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EPM 9900 Electronic Meter Chapter 1

1. Panel Mounting Brackets Grooves 8 Screw EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 3 3 CHAPTER 5 MECHANICAL INSTALLATION 3 2 Mounting the Optional External I O Modules Secure the mounting brackets to the I O module using the screws supplied 440 pan head screws Next secure the brackets to a flat surface using a 8 screw with a lock washer e f multiple I O modules are connected together as shown in Figure 3 5 secure a mounting bracket to both ends of the group Connect multiple modules using the RS485 side ports The EPM 9900 meter does not have internal power for I O modules use an additional power supply such as the GE Digital Energy PSIO See Using the Options Chapter for additional information Figure 3 7 External I O Modules Mounting Dimensions Front View mounting bracket MBIO mounting bracket MBIO 1 25 31 75mm Y per module 2 20 55 87mm 3 44 87 38mm Y 1 13 31 37mm Figure 3 8 External 1 0 Module Communication Ports and Mounting Brackets 2 x 1 10 27 93mm mouting brackets MBIO female RS485 side port output port male R5485 side port EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 5 MECHANICAL INSTALLATION Figure 3 9 External I O Modules Mounting Diagram Overhead
2. at PM Bargraph Brings you to a Bargraph display consisting of the following Phase A N Voltage e Phase B N Voltage e Phase C N Voltage ki 2008 08 27 00 21 57 Touch the Up Down arrows to move the vertical axis up down Touch the buttons to zoom in out Touch Show All to display all of the bars in the screen Touch Volts PH PH to view the Voltage Phase to Phase Bargraph screen Touch Current to view the Amps Bargraph screen The Current button is displayed on the Voltage Phase to Phase Bargraph screen EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Reset Brings you to the Meter Reset Command screen From this screen you can reset the following values e and Demand e Hour l2T and V2T counters e Alllogs e for current month e TOU active RESETS And Demand Current Month Hour 127 2 Counters jg TOU Active AllLogs 2008 08 27 00 22 15 WARNING RESETS CAUSE DATA TO BE LOST Touch the box es to select the Reset you want to perform gt Touch Reset All boxes are unchecked after a reset is performed and a check mark is displayed next to each item that was reset If password protection is enabled for the meter a keyboard screen displays when you press the Reset button Use the keyboard to enter the password If a valid passw
3. 187 53 M 5 ms altAB 109 75 104 00 203 84 0 00 1d MER lt 0 01 HMagwvA 10 00 2008 08 27 01 42 29 Touch Next Previous arrows to view all of the Limits Flicker Brings you to Flicker Instantaneous information consisting of the following e Time Start Reset Stop Current Next PST PLT Status Active or Stopped e Frequency e Base Voltage e Voltage readings Flicker ae n Time Base Voltage 120 Volts Sta Current 06 05 2011 14 08 16 Hest PST 01 44 Nest PLT 111 44 FrequencylHz FS En Voltage Readings Current 59 990 Wo std 169 093k 168 37 4l 168 981 1 201 1 06 03 14 08 16 Touch PST Short Term or PLT Long Term to view other flicker screens Flicker Short Term Displays the following information e Volts A B C e Volts A B C EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY e Volts A B C Flicker Wolts Volts B Volts Max Volts Max Volts Max Volts Min volts Min Volts Min Volts E IF Touch PINST Instantaneous or PLT Long Term to view other flicker screens Flicker Long Term Displays the following information e Volts A B C e Volts A B C e Min Volts A B C 05 0572011 0603720 11 b5 03 2011 5 03 2011 05 03 2011 5 03 2011
4. ZI VYZL9 unge V vvv Figure 3 3 Meter Side View 6 86 17 42cm lt gt 1 76 4 47 cm 5 10 12 95 lt P u1960 S L v6 G Figure 3 4 Optional Octagonal Cutout Dimensions Figure 3 5 Optional Rectangular Cutout Dimensions 4 96 4 56 11 58cm 135 0 50 0 50 3 1 3 Mounting Instructions 1 Slide the meter into the panel 2 Fromthe back of the panel slide 4 mounting brackets into the grooves on the top and bottom of the meter housing 2 fit on the top and 2 fit on the bottom 3 Snap the mounting brackets into place 4 Secure the meter to the panel with lock washer and a 8 screw in each of the 4 mounting brackets see Figure 3 4 3 2 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 5 MECHANICAL INSTALLATION 5 Tighten the screws with a 2 Phillips screwdriver Do not over tighten If necessary replacement mounting brackets Part number E145316 may be purchased from GE Digital Energy NOTE Figure 3 6 Mounting the Meter
5. 01 2 3 4 5 To view power quality information click Power Quality on the left side of the webpage You see the webpage shown below mer Oui y Windows Internet Explorer htte 80 0 0 LITWY LI pa him Multilin EPM 9900 POWER METERING SYSTEM Home Volte Ampe Power Lnergy Power Qealty Pulse Accemeletion Inputs Meter Information Lets Diagnostic Tools Power Quality Meter Name 0000000089977949 Date Time 2012 05 07 15 07 38 Voltage Current L wmo 1 ss 11 1335 15 0 00 0 00 00 0 00 7 0 00 00 0 00 Last PQ Events Events Date TimeoftastEvent Waveform 19 n 2012 05 07 14 35 05 PQ Gd 2012 05 07 14 35 02 Transient 3 2Q 3 3 2012 05 07 14 35 02 222 4 8 8 8 8 8 212 22 _ 2012 Genera Erect Company Digital Energy Ifernation Privacy Terns EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 6 Toview pulse accumulation data click Pulse Accumulation on the left side of the webpage You see the webpage shown below vf gt ase Ag Check amp Travelate Multilin EPM 9900 POWER METERING SYSTEM Home SB JI EM UU MEL Puise Accemeletion Inputs Meter Iaformetion a Pulse Accumulations Meter Name 0000000089977949
6. Universal Auto ranging Phase to Neutral Va Vb Vc Vaux to Neutral 5 347 VAC Phase to Phase to Vb Vb to Vc Vc to Va 10 600 VAC Supported hookups 5 Element Wye 2 5 Element Wye 2 Element Delta 4 Wire Delta Input 5M Ohm Phase Bai re 0 072 VA Phase Max at 600 Volts 0 003VA Phase Max at 120 Volts Pickup VOM OGG 5 VAC CONDECION 6 Pin 0 600 Pluggable Terminal Block Torque 5 Lb in AWG 12 24 Solid or Stranded Meets IEEE 3 7 90 1 pfo ERE TT Programmable Full Scale to any PT Ratio CURRENT INPUTS a NAI 5 A Nominal 20 A Maximum Wo E 1A Nominal 2 A Maximum 0 008 VA Per Phase at 20 Amps Pickup 0 196 of nominal COPE CONS O Lug or U Lug electrical connection Figure 4 1 Tighten with 2 Philips screwdriver Torque 8 Lb In Pass through wire 0 177 4 5mm Maximum Diameter Figure 4 2 Quick connect 0 25 Male Tab Figure 4 3 Current Surge Withstand at 23 C 100 A 10 sec 300 A 3 sec 500 A 1 sec Programmable Full Scale to any CT Ratio Continuous Current Withstand 20 Amps for sustained loads greater than 10 Amps use Pass through wiring method see Chapter 4 for instructions FREQUENCY ROD OC NEN 45 69 9 Hz EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER G
7. Min Volts A Current Min Volts B Min Volts 0 192 01 02 2011 23 20 00 08 Base Voltage 120 2 Fl cke r M on ito ri n g Polling Flicker R eading Pst Readings Displayed e Current Pst values for Va Vb and Vc and the time of computation e Current Pst Max values for Va Vb and Vc since the last reset and the time of the last reset e Current Pst Min values for Va Vb and Vc since the last reset and the time of the last reset EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 10 9 CHAPTER 10 FLICKER ANALYSIS Long Term Readings Click on the Long Term tab to view the Plt readings EN50160 IEC 61000 4 30 Flicker fl SANNOUS Short Term Start Reset PLT Time Current Vols Next PST Next PLT Oo Max Volts B Max Volts C Hass Min Volts A Current Min Volts Min Volts C Frequency Base Voltage Flicker Monito ring Polling Time Readings Displayed e Current Plt values for Va Vb and Vc and the time of computation e Current Plt Max values for Va Vb and Vc since the last reset and the time of the last reset Current Plt Min values for Va Vb and Vc since the last reset and the time of the last reset Click OK to exit the EN50160 IEC61000 4 30 Flicker Polling screen click Print to print all of the Readings views 10 10 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE
8. wye FPGAState DSP2 State Healthy Device Information peve pe fe ee Password Password Protection Disabled _ 30000 Ethernet 1 Info oser Boot 1 IDsPimenTime 3 Address 00 01 58 00 74 28 ma MESS 19091 Subnet Mask 255 255 255 0 0046 0000 Subnet Mask XS REOO469061 Default Gatewa 9 0 0 0 internal Serial amp 0000000089977949 Digital Energy Corea pe Tees 9 Toview alarm email information click Emails on the left side of the webpage You see the webpage shown below Scroll to see all of the information treads Windows Inberget Eimlorer tts alex Es 20 Multilin EPM 9900 POWER METERING SYSTEM Heme PowerfEnergy Power Pulse Accumelation laputs Meter latormation Emad Diageostic Tools Emails Last 10 stored emalls Emall ID Alarm In ASS arm names ha T EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 10 To view detailed information for the meter click Diagnostic on the left side of the webpage You see the webpage shown below The available diagnostic screens are listed on the page click on any of the listed items to view its detailed information Interne Explorer alf xj 8 B Et Weep Fawkes Took
9. https f 10 0 0 LI CITWSIGE vnitage htm File Edt wiew Pavontes Tools Help x Google JE ETE Du p Bose Ap check gt Gy FEET ERES A Favorites E B Suggested Sites P Web Gallery 7 a df insideGE Home volage Freg Current x fa E mm Pages Safety Took Multilin EPM 9900 POWER METERING SYSTEM Home Volte Amps Powerfl nergy Power Quality Puks Accumulation apts Meter Information maila Diagnestic Tools Voltage Freq Current Meter Name 000000008997 949 Dale Tirri 2012 05 07 15 05 30 Voltage Frequency Instantaneous 0 00 0 00 voc 75e 0 00 Last Reset 2012 04 19 13 40 04 8 Digital Energy M EI TOR a ae EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 9 5 CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 4 Toview power and energy readings click Power Energy on the left side of the webpage You see the webpage shown below Scroll to see all of the information reer and Energy Windows Internet Explorer z Multilin EPM 9900 POWER METERING SYSTEM Home Volte Ampe Power Laergy Power Quality Puise Accemeletion Inputs Meter Iaformietion Dlegneoestic Toole Power and Energy 0000000089977949 2012 05 07 15 06 47 WattHour Q1 4 Watt Hour Q 3 amp 01 2 VAR Hour Q3 4
10. main GE Communicator screen EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 10 FLICKER ANALYSIS 10 4 1 61000 4 30 Harmonic and Interharmonic Limits Screen In order to adhere to the IEC61000 4 30 Class A Flicker Meter standard the EPM 9900 meter calculates group and sub group values for harmonics and interharmonics up to the 51st order You can also set thresholds for these readings The thresholds are used to trip a flag a bit inside the status reading mapped into the modbus register The sub group readings and over threshold status are available through the Flicker logs and Modbus register IEC 61000 4 30 Harmonic and Interharmonic limits Harmonic Subgroup Interharmonic Subgroup Harmonic Group nterharmanic Group Threshold Threshold Threshold E Threshald 0 00 0 00 0 00 0 00 0 00 0 00 0 00 i 0 00 0 00 2 0 00 0 00 3 0 00 0 00 4 0 00 0 00 5 0 00 0 00 6 0 00 0 00 0 00 7 0 00 0 00 0 00 8 0 00 0 00 0 00 9 0 00 0 00 0 00 0 0 00 0 00 11 0 00 1 0 00 0 00 2 0 00 2 0 00 0 00 I3 0 00 3 0 00 0 00 4 0 00 14 0 00 0 00 5 0 00 5 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 1 2 3 4 5 6 cJ ncn ca n3 Frequency Bins 1 Click in a field to enter a threshold for that reading use the scroll bars to view all of the readings Whenever the meter s reading goes above the threshold the flag status bit is tripped 2
11. x Google Buen Ap check Spin 4 Uy oe B Sprid Steg He Web Shee Gallery Multilin EPM 9900 1 POWER METERING S STER home Woltn jAmps Power ileergy Power Pubes Accumulate Meter Delormation Dsagmantis Toni Diagnostic Screens Mt ER Fuevebes H Google 086 Buen Deed Fi 7 amh 4 dig 3 BB Suggested Shes QR Web hee Galery me Pages El Multilin EPM 9900 p HOMER METERING SYSTEM home Ampar Power Quality Pues Arcemelation lapisi Hater Information Imad Tonle Webtaols Firmware Upgrade amp Digital Energy rmi x To upgrade the meter s firmware click Firmware Upgrade EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 9 9 CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS You can also upgrade the meter s firmware using GE Communicator software Refer to the GE Communicator User Manual for instructions NOTE 11 You will see a log on screen See the example screen shown below The server mymetermeter com at The Meter requires a username and password Warning This server is requesting that your username and password be sent in an insecure manner basic authentication without a secure connection Password
12. Current Neutral Calculated A 2 096 F S 1 0 15 to 5 45 65 Hz Active Power Total W 0 2 of reading 0 15 to 5 A 69 to 480 0 5 to 1 lag lead PF Active Energy Total Wh 0 2 of reading 0 15 to 5 A 69 to 480 0 5 to 1 lag lead PF Reactive Power Total VAR 0 2 of reading 0 15 to 5 A 69 to 480 0 5 to 1 lag lead PF Reactive Energy Total VARh 0 296 of reading 0 15 to 5 A 69 to 480 4 0 5 to 1 lag lead PF Apparent Power Total VA 0 2 of reading 0 15 to 5 A 69 to 480 0 5 to 1 lag lead PF Apparent Energy Total VAh 0 2 of reading 0 15 to 5 A 69 to 480 V 0 5 to 1 lag lead PF Power Factor 0 2 of reading 0 15 to 5 A 69 to 480 0 5 to 1 lag lead PF Frequency Hz 0 05Hz 45 to 65 Hz Load Bar 1 segment 0 005 to 6 A 1 For 2 5 element programmed units degrade accuracy by an additional 0 5 of reading e For 1A Class 2 Nominal degrade accuracy by an additional 0 596 of reading For 1A Class 2 Nominal input current range for accuracy specification is 2096 of the values listed in the table For unbalanced voltage inputs where at least one crosses the 150V autoscale threshold for example 120V 120V 208V system degrade the accuracy to 0 496 of reading 5 With reference voltage applied VA VB or VC Other
13. Remember my credentials Enter the correct Username and Password to access the meter and click OK If password protection is not enabled for the meter the default username and password Jg are both anonymous NOTE 12 The webpage update1 htm opens See the example webpage shown below 2 Update Meter Windows Internet Explorer 7 7 p y V fe http mymetermeter com update 1 8 X jo Bing Update Meter File 1 Click on the Browse button to select the meter file 2 Click on the Update Meter File button to continue Please note the update process could take several minutes KE Browse Update MeterFile et f f Twedses a kion 4 13 Click the Browse button to locate the Upgrade file You must be using the PC on which the upgrade file is stored Ww NOTE 9 10 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 14 Click the Update Meter File button to begin the upgrade process The upgrade starts immediately it may take several minutes to complete 15 Once the upgrade is complete you see a webpage with a confirmation message shown below Click the Reset Meter button to reset the meter http mymetermeter com ge update mete Windows Internet Explorer 1619 le http mymetermeter com ge update mete 93 5 Bing P Meter file received 69857 bytes Parsing Module
14. SUBET MASK UM GATEWAY Bo o o MAC ADRESS 00 2008 09 24 17 42 15 ee EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 94 Total Web Solutions The EPM 9900 meter s Network card supports GE s Total Web Solutions which is a Web server that lets you view meter information over any standard Web browser The EPM 9900 meter default webpages can be viewed by Internet Explorer Firefox Chrome and Safari web browsers They can be viewed on PCs tablet computers and smart phones The default webpages provide real time readings of the meter s voltage current power energy power quality pulse accumulations and high speed digital inputs as well as additional meter information alarm email information and diagnostic information You can also upgrade the meter s firmware through the webpages You can customize the default webpages see Chapter 7 in the GE Communicator User Manual for instructions on setting up Total Web Solutions and customizing webpages 9 4 1 Viewing The following is information on accessing the default webpages Webpages 1 OpenaWeb browser on your PC tablet computer or smart phone 2 Typethe Ethernet Card s IP address in the address bar preceded by http For example http 10 0 0 1 3 You will see the Volts Amps webpage shown below It shows voltage and current readings F Vnltagr Freep Current Windows Internet Fuplorer Ge
15. oV AR 1 16 0 00 Status 2008 08 27 00 34 08 Touch Accu to view TOU Accumulations Touch Next Previous arrows to scroll Registers 1 8 and Totals Touch Next Previous arrows to scroll Frozen Prior Month Active and Current Month EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 13 6 14 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY NOTE If password protection is enabled for the meter a keyboard screen displays allowing you to enter the password If a valid password is entered the TOU data readings are displayed otherwise a message displays indicating that the password is invalid Phasors Brings you to Phasor Analysis Information e Phase Phasor arrow buttons change the rotation of the diagram e Phase Mag button shows the phase magnitude of e Phase angle or magnitude Van bn cn e Phase angle or magnitude la b c e Phase angle or magnitude Vab bc ca e The PH PH check box shows hides the phase to phase voltage Wolts A walts walts C 240 02 Amps 029 52 Amps Amps 269 55 Wolts 330 37 Wolts BC 089 65 volts 210 33 FreglHzi 60 001 ees Hookup ABC Phase Phasor p 2010 01 07 14 41 51 Harmonics Spectrum Brings you to Harmonic Spectrum Analysis information consisting of the following e 96THD e TDD current only e KFactor e Frequency Phase A N Voltage EPM 9900 MULTI FUNCTION POWER METERING SYS
16. 11 8 DIGITAL INPUT OPTION CARD D1 WIRING essere tenente 11 9 TOC 2 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE A INSTALLING THE USB VIRTUAL COMM PORT B POWER SUPPLY OPTIONS EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE OPTIONAL EXTERNAL MODULES mcer Pm 11 10 PORT 11 11 INSTALLING OPTIONAL EXTERNAL I O MODULES 11 11 POWER SOURCE FOR EXTERNAL I O MODULES ens 11 12 USING PSIO WITH MULTIPLE I O MODULES nenne 11 13 FACTORY SETTINGS AND RESET BUTTON 11 14 ANALOG TRANSDUCER SIGNAL OUTPUT MODULES 11 15 DIGITAL DRY CONTACT RELAY OUTPUT FORM MODULE 11 16 DIGITAL SOLID STATE PULSE OUTPUT KYZ MODULE 22 11 17 ANALOG INPUT MODULES dit ener cu matu icc A UE 11 18 ADDITIONAL EXTERNAL MODULE SPECIFICATIONS 11 20 1 amp oer 1 INSTALLING TRE VIRTUAL PORTS DRIVES Eo metr A 1 CONNECTRA TD EHE VISUAL POOR c Sir iasi A 3 TOC 3 TOC 4 GE Energy EPM 9900 Electronic Meter Chapter 1 Three Phase Power Measurement This introduction to three phase power and power measurement is intended to provide only a brief overview of the subject The professional meter engineer or meter technician should refer to more advanced documents such as the Handbook fo
17. 4 kVAR bM MEME NN NES ME N E Enter Value at Transformer Base for each quantity from calculations above Enter Trf Factor value from Base Conversion Factor calculations above Calculate M T Factor with Exponent by raising the M T Factor to the power indicated in the Exp or Exponent column Calculate the Value at Meter Base by multiplying the M T Factor w Exp times the Value at Trf Base Loss Watts Percentage Values Meter Base kVA 600 PT Multiplier CT Multiplier 1000 600 A 1000 Calculate Load Loss Values Quantity Value at Meter Meter Base 96 Loss at Meter Quantity Base kVA Base No Load Loss 96 Loss VARs FE kVAR Enter Value at Meter Base from Normalize Losses section Enter Meter Base kVA from previous calculation Calculate 96 Loss at Meter Base by dividing Value at Meter Base by Meter Base kVA and multiplying by 100 Enter calculated 96 Loss Watts values into the EPM 9900 meter using GE Communicator software Refer to Appendix B of the GE Communicator User Manual for instructions EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 7 7 CHAPTER 7 TRANSFORMER LOSS COMPENSATION 7 8 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 8 Time of Use Function 8 1 Introduction A Time of Use TOU usage structure takes into account the quantity of energy used and the time at whic
18. CTs C BCN SERVICE WYE 4WIRE 3CTs See Wiring the Monitored Inputs Vaux section EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 13 CHAPTER 4 ELECTRICAL INSTALLATION Figure 4 9 3 Wire 2 Element Open Delta with 2 PTs and 2 CTs malt J wu L LL _ _ SERVICE DELTA 3WIRE 2 PTs 2 See Wiring the Monitored Inputs Vaux section 4 14 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 4 ELECTRICAL INSTALLATION Figure 4 10 3 Wire 2 Element Open Delta Direct Voltage with 2 CTs SERVICE DELTA 3WIRE 2 PTs 2 See Wiring the Monitored Inputs Vaux section EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 15 CHAPTER 4 ELECTRICAL INSTALLATION 4 16 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 5 Communication Installation 5 1 Communication Overview This chapter contains instructions for using the EPM 9900 meter s standard and optional communication capabilities The EPM 9900 meter offers the following communication modes RJ45 100BaseT Ethernet connection standard e ANSI Optical port standard USB 2 0 connection standard Two RS485 communication ports optional Second Ethernet connection either RJ45 or Fiber Optic optional 5 2 RJ45 and Fiber Ethernet Connections The standard RJ
19. Click OK to save your settings 3 Click Update Device to send the new settings to the meter and return to the main GE Communicator screen EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 10 7 CHAPTER 10 FLICKER ANALYSIS 10 5 EN50160 1EC61000 4 30 Flicker Polling Screen From the GE Communicator Title bar select Real Time Poll gt Power Quality and Alarms gt Flicker You will see the screen shown below 50160 IEC 61000 4 30 Flicke lC I instantaneous Short Term Star Reset e uzu 1555 PINST Voltage Reading Current Volts A Next PST Volts B Next PLT Volts C Base Frequency Base Voltage Flicker Monito ring Polling Flicker Readings This section describes the Main screen functions These functions are found on the left side of the screen Time e Start Reset is the time when flicker was started or reset A reset of flicker causes the Max Min values to be cleared A reset should be performed before you start using Flicker logging to update the Start time e Current is the current clock time e Next Pst is the countdown time to when the next Pst value is available e Next Plt is the countdown time to when the next Plt value is available Status e Indicates the current status Active on Frequency e Base is the operating frequency 50 or 60 Hz selected in the EN50160 Flicker screen see Section 10 3 e
20. Current Inputs Software I O Modules Slot 1 Slot 2 Slot 3 Slot 4 PL9900 AC HI Description EPM 9900 Multi function metering system 100 to 240 VAC Power Supply 90 to 265 VAC or 100 to 370 VDC 50 Hz AC frequency system 60 Hz AC frequency system 1 Amp 5 Amps 128 MB with 512 samples cycle 1 GB memory with 1024 samples cycle 1 GB memory with 1024 samples cycle 10MHz Transient Recording 2 ports RS485 and 4 Pulse outputs Empty slot 1A 5 n gt ET Second Ethernet Port 10 100BaseTX RJ45 E2 Second Ethernet Port 100FX Multimode ST connector X Empty slot R1 6Relay outputs D1 16 Status inputs X Empty slot R1 6Relay outputs D1 16 Status inputs X Empty slot EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 2 OVERVIEW AND SPECIFICATIONS 2 6 Specifications POWER SUPPLY 115 Option UL Rated to 100 240 VAC 10 HI Universal 90 265 VAC 50 60Hz or 100 370 VDC Power Consumption 18 to 25 VA 15 to 17 W depending on the meter s hardware configuration ue echar 3 Pin 0 300 Pluggable Terminal Block Torque 3 5 Lb In AWG 12 24 Solid or Stranded Branch circuit protection size should be 15 Amps VOLTAGE INPUTS UL Measurement Category Category Ill
21. Register Rollover A point at which a Register reaches its maximum value and rolls over to zero Reset Logs are cleared or new default values are sent to counters or timers Rolling Window Average Power The Rolling Sliding Window Average is the average power calculated over a user set time interval that is derived from a specified number of sub intervals each of a specified time For example the average is calculated over a 15 minute interval by calculating the sum of the average of three consecutive 5 minute intervals This demand calculation methodology has been adopted by several utilities to prevent customer manipulation of KW demand by simply spreading peak demand across two intervals RS232 A type of serial network connection that connects two devices to enable communication between the devices An RS232 connection connects only two points Distance between devices is typically limited to fairly short runs Current standards recommend a maximum of 50 feet but some users have had success with runs up to 100 feet Communications speed is typically in the range of 1200 bits per second to 57 600 bits per second RS232 connection can be accomplished using Port 1 of the EPM 9900 9450 9650 meter RS485 A type of serial network connection that connects two or more devices to enable communication between the devices An RS485 connection allows multi drop communication from one to many points Distance between devices is
22. YWARh 39931 5431 2008 09 24 17 40 29 Touch TOU to view the TOU Register Accumulations screen TOU Brings you to Accumulations Information consisting of the following Watthr Quadrant 2 Quadrant 3 Primary VAhr Quadrant 2 Primary VARhr Quadrant 2 Primary VAhr Quadrant 3 Primary EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY e VARhr Quadrant 3 Primary e Watthr Quadrant 1 Quadrant 4 Primary e VAhr Quadrants 1 Quadrant A Primary e VARhr Quadrant 4 Primary e Status Active or Stopped TOU Readings an bo fom foo Begin 08 07 2009 00 00 00 End 09 0172 Register Accumulation WARK 78 5431040 M 68 1479680 M 32 3269120 53 3690880 DEL Wh 2 REC Wh 2Bbl238954K 792051100 865274880 YAR 39 0412800 M VARR 48 5395520 M YARR 10 0305920 M 2008 08 27 00 20 31 Touch Peak to view the Register Peak Demand screen Touch Next Previous arrows to scroll Registers 1 8 and Totals Touch Next Previous arrows to scroll Frozen Prior Month Active and Current Month TOU Brings you to Register Demand information consisting of the following e Block Fixed Window Watthr VARhr Watthr kVARh Coin Coin VARh TOU Readings Begin 0870772 109 00 00 End 09 0172 Del Wyatt 0 10 Rec Watt 0 00 Del VAR 1 40 Rec VAR n nu
23. requirement of 4 000 watts If the load were served for one hour it would absorb four kWh If the load were served for 15 minutes it would absorb 1 4 of that total or one kWh Figure 1 7 shows a graph of power and the resulting energy that would be transmitted as a result of the illustrated power values For this illustration it is assumed that the power level is held constant for each minute when a measurement is taken Each bar in the graph will represent the power load for the one minute increment of time In real life the power value moves almost constantly The data from Figure 1 7 is reproduced in Table 2 to illustrate the calculation of energy Since the time increment of the measurement is one minute and since we specified that the load is constant over that minute we can convert the power reading to an equivalent consumed energy reading by multiplying the power reading times 1 60 converting the time base from minutes to hours EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 1 THREE PHASE POWER MEASUREMENT Figure 1 7 Power use over time 80 70 60 50 40 50 20 10 0 1 2 3 4 5 6 9 30 11 414272 16 1 1 Time minutes Table 1 2 Power and energy relationship over time Time Interval Power kW Energy kWh Accumulated Minute Energy kWh 1 50 0 50 0 50 2 50 0 85 1 53 3 40 0 67 2
24. 3 V CHAPTER A INSTALLING THE USB VIRTUAL COMM PORT Click the plus sign next to Ports COM amp LPT The COM ports will be displayed The USB Serial Port is the Virtual port See the example screen shown on the next page Ham 2 Ports COM amp LPT E Communications Pork 1 if ECP Printer Port LPT1 Mr j USB serial Port COMS m Processors In this example is the Virtual port is the port you select in the Connect screen EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 26 GE Energy EPM 9900 Electronic Meter Chapter B Power Supply Options The EPM 9900 meter offers the following power supply options UL Rated AC Power Supply 100 2401 VAC High Voltage DC 100 2401VDC 90 265 VAC EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 CHAPTER B POWER SUPPLY OPTIONS
25. C runtime Module C update successful Reset Meter EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 9 11 CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 9 12 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 10 Flicker Analysis 10 1 Overview Flicker is the sensation that is experienced by the human visual system when it is subjected to changes occurring in the illumination intensity of light sources The primary effects of flicker are headaches irritability and sometimes epileptic seizures IEC 61000 4 15 and former IEC 868 describe the methods used to determine flicker severity This phenomenon is strictly related to the sensitivity and the reaction of individuals It can only be studied on a statistical basis by setting up suitable experiments among people The EPM 9900 meter has compliance for flicker and other power quality measurements Refer to Chapters 16 and 17 of the GE Communicator User Manual for additional information on flicker and compliance monitoring 10 2 Theory of Operation Flicker can be caused by Voltage variations that are in turn caused by variable loads such as arc furnaces laser printers and microwave ovens In order to model the eye brain change which is a complex physiological process the signal from the power network has to be processed while conforming with figure 10 1 e Block 1 consists of scaling circuitry and
26. Current is the real time frequency measurement of the applied Voltage Base Voltage e The Voltage reference based on the Standard s specification calculated automatically by the EPM 9900 meter Flicker Monitoring Click Reset to cause the Max Min values to be cleared 10 8 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 10 FLICKER ANALYSIS uy The Reset function may be restricted to a level 2 password If so and if you have not signed on with a level 2 password you will not see the Reset button NOTE Use the tabs at the top of the screen view to the Instantaneous Short Term and Long Term readings Instantaneous Readings The Instantaneous view is the default of this screen see the screen shown on the previous page If you are in the Short or Long Term views click on the Instantaneous tab to display this view NOTE The PU values Pinst for Voltage Inputs Va Vb and Vc are displayed here and are continuously updated The corresponding current Voltage values for each channel are displayed for reference Short Term Readings Click on the Short Term tab to view the Pst readings EN50160 IEC 61000 4 30 Flicker O_o instantaneous Short Termi Start Reset Time PST Current Volts Next PST Next PLT FONS D 01 13 2011 15 30 00 05 Volts Status Max Volts A Max Volts B Max Volts C 02251 12 27 2010 19 50 00 24 Frequency
27. I O Card into the Meter yo CARD ma Elles oa Tt 1 Remove the screws at the top and the bottom of the Option card slot covers 2 There is a plastic track on the top and the bottom of the slot The Option card fits into this track Make sure the I O card is inserted properly into the track to avoid damaging the card s components 5 Slide the card inside the plastic track and insert it into the slot You will hear a click when the card is fully inserted Be careful it is easy to miss the guide track Refer to Figure 11 1 11 3 Configuring Option Cards FOR PROPER OPERATION RESET ALL PARAMETERS IN THE UNIT AFTER HARDWARE MODIFICATION The EPM 9900 meter auto detects any Option cards installed in it Configure the Option cards through GE Communicator software Refer to Chapter 19 of the GE Communicator User Manual for detailed instructions EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE I O OPTIONS 11 4 Pulse Output RS485 Option Card S Option Pulse Output RS485 Port Specifications Dual RS485 Transceiver meets or exceeds EIA TIA 485 Standard Two wire half duplex Min Input Impedance 96 kO Isolation Between Channels AC 1500 V Wh Pulse 4 KYZ output contacts Pulse Width Programmable from 5 msec to 655 msec Selectable from Form A or Form C Solid State SPDT INO C NO
28. Plt Min values for long term recording Figure 10 1 Simulation of Eye Brain Response Simulation Of Eye Brain Response Block 1 Block 2 Block 3 Block 4 Block 5 Voltage Detector High Pass AID and Gain Filter Converter Minimum Output Control DC 1st Sampling 64level Square Removal Weighting Squaring Order Rate Classifier Law Filter Multiplier 19119 gt 50 2 Demodulator Low Mean Pass Filter Filter Input Carrier Voltage Removal Adaptor Programming of short and long observation periods Output Recording Instantaneous Flicker in Perceptibility Units Pinst Output and Data Display Pst Max Min Pst Plt Max Min EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 10 3 10 4 CHAPTER 10 FLICKER ANALYSIS 10 3 EN50160 1EC61000 4 30 Flicker Logging The EPM 9900 meter can record flicker values in independent logs When flicker recording is enabled entries are made into the logs in accordance with the times the associated values occur Pst Pst Max Pst Min Plt Pit Max Plt Min and Reset times are all recorded You can download the Flicker logs to the Log Viewer and graph or export the data to another program such as Excel Refer to Chapter 8 of the GE Communicator User Manual for detailed information on retrieving and viewing logs with the Log Viewer You must set up several parameters to properly configure f
29. Power Factor It is called Total PF because it is based on the ratios of the power delivered The delivered power quantities will include the impacts of any existing harmonic content If the voltage or current includes high levels of harmonic distortion the power values will be affected By calculating power factor from the power values the power factor will include the impact of harmonic distortion In many cases this is the preferred method of calculation because the entire impact of the actual voltage and current are included A second type of power factor is Displacement Power Factor Displacement PF is based on the angular relationship between the voltage and current Displacement power factor does not consider the magnitudes of voltage current or power It is solely based on the phase angle differences As a result it does not include the impact of harmonic distortion Displacement power factor is calculated using the following equation Displacement PF cos where is the angle between the voltage and the current see Fig 1 9 In applications where the voltage and current are not distorted the Total Power Factor will equal the Displacement Power Factor But if harmonic distortion is present the two power factors will not be equal EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 1 THREE PHASE POWER MEASUREMENT 1 4 Harmonic Distortion Harmonic distortion is primarily the result of high concentrations of
30. The opening accommodates up to 0 177 4 5mm maximum diameter CT wire Figure 4 2 Pass Through Wire Electrical Connection CT wire passing through meter with current gills removed Close up of CT openings For sustained loads greater than 10 Amps use 10 AWG wire NOTICE EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 4 ELECTRICAL INSTALLATION 4 4 Quick Connect Crimp on Terminations You can use 0 25 Quick Connect Crimp on connectors for quick termination or for portable applications Figure 4 3 Quick Connect Electrical Connection Quick Connect Crimp on termination For sustained loads greater that 10 Amps use pass through wiring method Section NO TICE 4 3 using 10 AWG wire EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 5 CHAPTER 4 ELECTRICAL INSTALLATION 4 5 Wiring the Monitored Inputs and Voltages Select a wiring diagram from Section 4 12 that best suits your application and wire the meter exactly as shown For proper operation the voltage connection must be maintained and must correspond to the correct terminal Program the CT and PT ratios in the Device Profile section of the GE Communicator software see the GE Communicator User Manual for details Figure 4 4 Voltage and Power Supply Connections RS485 Pulse Outputs IRIG B 10 100BaseT Ethernet High Speed Inputs Fiber Optic Connection and Relay Outputs 10 100BaseT Ethernet RS485 Co
31. Vaux connection is an auxiliary voltage input that can be used for any desired purpose such as monitoring two different lines on a switch The Vaux Voltage rating is the same as the metering Voltage input connections 4 9 Wiring the Monitored Inputs Currents Mount the current transformers CTs as close as possible to the meter The following table illustrates the maximum recommended distances for various CT sizes assuming the connection is via 14 AWG cable GE Digital Energy Recommendations CT Size Maximum distance ui to EPM 9900 Meter DO NOT leave the secondary of the CT open when primary current is flowing ANWARNING This may cause high voltage on open secondary CT which could be potentially lethal to humans and destructive to equipment itself EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 7 4 8 CHAPTER 4 ELECTRICAL INSTALLATION If the CT is not connected provide a shorting block on the secondary of the CT It is important to maintain the polarity of the CT circuit when connecting to the EPM 9900 meter If the polarity is reversed the meter will not provide accurate readings CT polarities are dependent upon correct connection of CT leads and the direction CTs are facing when clamped around the conductors Although shorting blocks are not required for proper meter operation GE Digital Energy recommends using shorting blocks to allow removal of the EPM 9900 meter from an energized circui
32. an automatic gain control function that normalizes input Voltages to Blocks 2 3 and 4 e Block 2 recovers the Voltage fluctuation by squaring the input voltage scaled to the reference level This simulates the behavior of a lamp e Block 3 is composed of a cascade of two filters and a measuring range selector In this implementation a log classifier covers the full scale in use so the gain selection is automatic and not shown here The first filter eliminates the DC component and the double mains frequency components of the demodulated output For 50 Hz operation the configuration consists of a first order high pass EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 10 1 10 2 CHAPTER 10 FLICKER ANALYSIS filter with 3db cut off frequency at about 0 05 Hz and a 6 order butterworth low pass filter with 35 Hz 3 db cut off frequency The second filter is a weighting filter that simulates the response of the human visual system to sinusoidal Voltage fluctuations of a coiled filament gas filled lamp 60 W 230 V The filter implementation of this function is as specified in IEC 61000 4 15 e Block 4 is composed of a squaring multiplier and a Low Pass filter The human flicker sensation via lamp eye and brain is simulated by the combined non linear response of Blocks 2 5 and A e Block 5 performs an online statistical cumulative probability analysis of the flicker level Block 5 allows direct calculation of the evaluation paramete
33. at 25 are as follows Minimum input O V input shorted to V voltage Maximum input DC 150 V diode protected against polarity voltage reversal Filtering De bouncing with 10 ms delay time AC 2500 V system to inputs The general specifications are as follows Operating 20 to 70 C temperature Storage temperature 30 to 80 Relative air humidity Maximum 9596 non condensing EMC Immunity EN61000 4 2 Interference Dimensions inches 0 75 x 4 02 x 4 98 WxHxL Card slot Option slots 3 and 4 External connection Wire range 16 to 26 AWG Strip length 0 250 Torque 2 2 Ib in 18 pin 3 5 mm pluggable terminal block y This feature allows for either status detect or pulse counting Each input can be assigned an independent label and pulse value NOTE 11 8 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE OPTIONS 11 7 1 Digital Input Option Card D1 Wiring SLOT 3 4 DIGITAL INPUTS Inputs 1 2 16 For dry contacts V Inputs 1 2 16 For wet contacts MEM V Loop V V Loop Alternate for wet contacts Inputs 1 2 16 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 9 11 10 CHAPTER 11 USING THE I O OPTIONS 11 8 Optional External I O Modules All EPM 9900 external I O modules have the following components Female RS485 Female RS485 Side Port use to conn
34. first scientific basis for poly phase metering His theorem states If energy is supplied to any system of conductors through N wires the total power in the system is given by the algebraic sum of the readings of N wattmeters so arranged that each of the N wires contains one current coil the corresponding potential coil being connected between that wire and some common point If this common point is on one of the N wires the measurement may be made by the use of N 1 wattmeters The theorem may be stated more simply in modern language In a system of N conductors N 1 meter elements will measure the power or energy taken provided that all the potential coils have a common tie to the conductor in which there is no current coil Three phase power measurement is accomplished by measuring the three individual phases and adding them together to obtain the total three phase value In older analog meters this measurement was accomplished using up to three separate elements Each element combined the single phase voltage and current to produce a torque on the meter disk All three elements were arranged around the disk so that the disk was subjected to the combined torque of the three elements As a result the disk would turn at a higher speed and register power supplied by each of the three wires According to Blondell s Theorem it was possible to reduce the number of elements under certain conditions For example a three phase three wire delta
35. inaccuracies in electromechanical compensators e Performs Bidirectional Loss Compensation e Requires no additional wiring the compensation occurs internally e mposes no additional electrical burden when performing Loss Compensation Loss Compensation is applied to 1 second per phase Watt VAR readings and because of that affects all subsequent readings based on 1 second per phase Watt VAR readings This method results in loss compensation being applied to the following quantities Total Power e Demands per phase and total Thermal Block Fixed Window Rolling Sliding Window and Predictive Window e Maximum and minimum Demand Energy accumulations e KYZ output of Energy accumulations EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 7 3 7 2 1 Loss Compensation in Three Element Installations CHAPTER 7 TRANSFORMER LOSS COMPENSATION 7 2 9900 Meter s Transformer Loss Compensation The EPM 9900 meter provides compensation for active and reactive power quantities by performing numerical calculations The factors used in these calculations are derived either e By clicking the TLC Calculator button on the Transformer Loss screen of the Device Profile to open the GE Digital Energy Loss Compensation Calculator in Microsoft Excel e figuring the values from the worksheet shown here and in Appendix B of the GE Communicator User Manual Either way you enter the derived values into the GE Com
36. is used to scale the value of the current from a secondary value up to the primary side of an instrument transformer Cumulative Demand The sum of the previous billing period maximum demand readings at the time of billing period reset The maximum demand for the most recent billing period is added to the previously accumulated total of the maximum demands Demand The average value of power or a similar quantity over a specified period of time Demand Interval A specified time over which demand is calculated Display User configurable visual indication of data in a meter DNP 3 0 A robust non proprietary protocol based on existing open standards DNP 3 0 is used to operate between various systems in electric and other utility industries and SCADA networks Nonvolatile memory Electrically Erasable Programmable Read Only Memory that retains its data during a power outage without need for a battery Also refers to meter s FLASH memory Energy Register Programmable record that monitors any energy quantity Example Watt hours VAR hours VA hours Ethernet A type of LAN network connection that connects two or more devices on a common communi cations backbone An Ethernet LAN consists of at least one hub device the network backbone with multiple devices connected to it in a star configuration The most common versions of Ethernet in use are 10BaseT and 100BaseT as defined in IEEE 802 3 standards Howeve
37. plug see Figure 5 2 e The maximum length of the USB cable is 5 meters Greater lengths require hubs or active extension cables active repeaters Figure 5 1 USB Type B Plug The GE Communicator automatically installs the drivers for the EPM 9900 meter The driver configures the computer s USB Host port as a virtual serial port compatible with the EPM 9900 meter s USB device port See Appendix A for instructions on installing the driver 5 5 RS485 Connections The optional RS485 connections allow multiple EPM 9900 meters to communicate with another device at a local or remote site All RS485 links are viable for a distance of up to 4000 feet 1219 meters RS485 ports 1 and 2 on the EPM 9900 meter are optional two wire RS485 connections with a baud rate of up to 115200 You need to use an RS485 to Ethernet converter such as GE Digital Energy s Multinet See Section 5 5 1 for information on using the Multinet with the EPM 9900 meter You can order the Multinet from GE Digital Energy s webstore www gedigitalenergy com Figure 5 3 shows the detail of a 2 wire RS485 connection NOTE Figure 5 2 2 wire RS485 Connection From other RS485 device Connect Jto 9 e 10 e Shield SH to Shield SH ge EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 5 COMMUNICATION INSTALLATION NOTES on RS485 Communication e Use a shielded twisted pair cable 22 AWG 0
38. profile The interval is typically 15 minutes So Average Amps is the thermal average of Amps over the previous 15 minute interval The thermal average rises to 9096 of the actual value in each time interval For example if a constant 100 Amp load is applied the thermal average will indicate 90 amps after one time interval 99 amps after two time intervals and 99 9 amps after three time intervals Average Input Pulse Accumulations When applied to Input Pulse Accumulations the Average refers to the block fixed window average value of the input pulses Average Power When applied to power values Watts VARs VA the average is a calculated value that corresponds to the thermal average over a specified time interval The interval is specified by the user in the meter profile The interval is typically 15 minutes So the Average Watts Is the thermal average of Watts over the previous 15 minute interval The thermal average rises to 90 of the actual value in each time interval For example if a constant 100 kW load is applied the thermal average will indicate 90 kW after one time interval 99 kW after two time intervals and 99 9 kw after three time intervals Bit A unit of computer information equivalent to the result of a choice between two alternatives Yes No On Off for example Or the physical representation of a bit by an electrical pulse whose presence or absence indicates data Binary Relating to a syst
39. relay contact outputs up to 2 Relay Output cards can be installed in the meter Optional Digital Input card with 16 status inputs up to 2 Digital Input cards can be installed in the meter Optional External I O modules consisting of up to 4 Analog Output modules 1 Digital Dry Contact Relay Output module up to 4 Digital Solid State Pulse Output modules and up to 4 Analog Input Modules See Chapter 11 for detailed information on the options e NOTE Logging of Modbus slave devices for RTU concentrator functions Extensive Memory and Communication Onboard mass memory over 1 GigaByte compact Flash that enables the EPM 9900 meter to retrieve and store multiple logs Standard 10 100BaseT RJ45 Ethernet that allows you to connect to a PC via Modbus TCP a second optional Ethernet connection can be either RJ45 or Fiber Optic A USB Virtual Com Port compatible with USB1 1 USB2 0 that provides serial communication Optional RS485 Pulse Output card that provides two RS485 ports and 4 pulse outputs that are user programmable to reflect VAR hours Watt hours or VA hours Advanced Power Quality analysis that includes measuring and recording Harmonics to the 255th order and Real Time Harmonics to the 128th order Multiple Protocols that include DNP V3 00 see Section 2 2 for more details 200msec high speed updates that are available for Control applications Software Option technology that allows you to upgrade the meter in the fiel
40. system could be correctly measured with two elements two potential coils and two current coils if the potential coils were connected between the three phases with one phase in common In a three phase four wire wye system it is necessary to use three elements Three voltage coils are connected between the three phases and the common neutral conductor A current coil is required in each of the three phases In modern digital meters Blondell s Theorem is still applied to obtain proper metering The difference in modern meters is that the digital meter measures each phase voltage and current and calculates the single phase power for each phase The meter then sums the three phase powers to a single three phase reading Some digital meters calculate the individual phase power values one phase at a time This means the meter samples the voltage and current on one phase and calculates a power value Then it samples the second phase and calculates the power for the second phase Finally it samples the third phase and calculates that phase power After sampling all three phases the meter combines the three readings to create the equivalent three phase power value Using mathematical averaging techniques this method can derive a quite accurate measurement of three phase power EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 1 THREE PHASE POWER MEASUREMENT More advanced meters actually sample all three phases of voltage and cur
41. the EPM 9900 meter s baud rate Selected Modem Strings Cardinal modem AT amp FEOF8 amp KONOS3 7 9 Zoom Faxmodem VFX AT amp FO amp KOSO 1 amp 8WO amp VYO V 52BIS 14 AK Zoom Faxmodem 56Kx Dual AT amp FO amp KO amp COSOZ1 amp WOS amp YO Mode USRobotics Sportster 33 6 AT amp FO amp N6 amp WOYO for 9600 baud Faxmodem Up Up Down Down Up Up Up DIP switch setting Down USRobotics Sportster 56K AT amp FOSWOVO Faxmodem DIP switch setting Up Up Down Down Up Up Up Down EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 5 COMMUNICATION INSTALLATION 5 9 High Speed Inputs Connection The EPM 9900 meter s built in High Speed Inputs can be used in two ways e Attaching status contacts from relays breakers or other devices for status or waveform initiation e Attaching the KYZ pulse outputs from other meters for pulse counting and totalizing Even though these inputs are capable of being used as high speed digital fault recording inputs they serve a dual purpose as KYZ counters and totalizers The function in use is programmable in the meter and is configured via GE Communicator Refer to the GE Communicator User Manual for instructions on programming these features The High Speed Inputs can be used with either dry or wet field contacts For wet contacts the common rides on a unit generated Nominal 15 VDC No user programming is necessary to use either wet or dry field contacts Figure 5 6 High Speed Inputs Co
42. 00 4 55 0 92 2 92 5 60 1 00 5 92 6 60 1 00 4 92 7 70 1 17 6 09 8 70 117 7 26 9 60 1 00 8 26 10 70 1 17 9 43 11 80 1 53 10 76 12 50 0 85 12 42 13 50 0 85 12 42 14 70 Ly 13 59 15 80 1535 14 92 As in Table 1 2 the accumulated energy for the power load profile of Figure 1 7 is 14 92 KWh Demand is also a time based value The demand is the average rate of energy use over time The actual label for demand is kilowatt hours hour but this is normally reduced to kilowatts This makes it easy to confuse demand with power But demand is not an instantaneous value To calculate demand it is necessary to accumulate the energy readings as illustrated in Figure 1 7 and adjust the energy reading to an hourly value that constitutes the demand In the example the accumulated energy is 14 92 kWh But this measurement was made over a 15 minute interval To convert the reading to a demand value it must be normalized to a 60 minute interval If the pattern were repeated for an additional three 15 minute intervals the total energy would be four times the measured value or 59 68 kWh EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 9 1 10 CHAPTER 1 THREE PHASE POWER MEASUREMENT The same process is applied to calculate the 15 minute demand value The demand value associated with the example load is 59 68 kWh hr or 59 68 kWd Note that the peak instantaneous value of power is 80 kW significantly more than the demand val
43. 0603720 11 5 03 2011 5 03 2011 m 14 19 24 00 14 19 24 00 14 19 24 00 14 19 24 00 14 13 24 00 14 19 24 00 14 19 24 00 14 19 24 00 14 19 24 00 2011 06 03 14 19 34 Flicker eu Volts vnlts Wolts Volts Max valts Max valts Min volts Min valts Min Volts PLT 15 431 15 351 15 452 15 491 15 3557 15 452 15 431 15 357 15 452 re E IF Touch PINST Instantaneous or PST Short Term to view other flicker screens EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 3 2011 72 011 3 2011 3 2011 6rg3 2011 0603720 11 0 70372011 0603720 11 2011 06 05 14 13 24 14 13 16 00 14 12 16 00 14 13 16 00 14 13 16 00 14 13 16 00 14 13 16 00 14 13 16 00 14 13 16 00 14 13 16 00 PST CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY NOTE If password protection is enabled for the meter a keyboard screen displays when you press any action button e g Reset Use the keyboard to enter the password If a valid password is entered the requested Flicker action takes place otherwise a message displays indicating that the password is invalid FLICKER
44. 09 2009 5 20 08 PM m a m am Real Time Power Real Time Power Readings Details e instant Watt VAR VA PF e Thermal Watt VAR VA PF e Predicted Watt VAR VA 0 95 98 0 058 Lead 0 662 Lag 2008 08 27 00 18 35 Touch Demand to go to the Demand Power screen shown below Demand Power Demand Power Readings Details e Thermal Window Average Maximum Watt VAR Coln VAR e Block Fixed Window Average Maximum Watt VAR Coln VAR EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 11 6 12 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Predictive Rolling Sliding Window Maximum Watt VAR Coln VAR Demand Power Thermal Black Rolling iyi att amp 16 0 10 Watts 0 00 0 00 0 00 i atts Coin YARS 2 24 1 16 0 31 Watts Coin YARS 0 00 0 00 0 00 HARS 3 58 1 40 0 94 2008 08 27 00 19 55 Touch R T to view the Real Time Power screen Energy Brings you to Accumulated Energy Information consisting of the following Watthr Quadrant 2 Quadrant 3 Primary VAhr Quadrant 2 Primary VARhr Quadrant 2 Primary VAhr Quadrant 3 Primary VARhr Quadrant 3 Primary Watthr Quadrant 1 Quadrant 4 Primary VAhr for all quadrants Primary VARR 34417 8323 34430 5903 03016 9833 DEL Wh 422 REC Wh g582 1275 i VAh 16742 7670 1 UAR 41806 2226 VARh 16731 0584
45. 160 1EC61000 4 30 logging in Historical logs 7 and 8 NOTE 4 Make the following selections entries IEC 61000 4 30 Class A e Enter the nominal Voltage in secondary range from 40V to 600V e Select the frequency 50 or 60Hz IEC 61000 4 30 Flicker e Select the short term test time 1 10 minutes in minute increments e Select the long term test time 10 240 minutes in ten minute increments EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 10 5 CHAPTER 10 FLICKER ANALYSIS EN 50160 e Select the number of allowed rapid Voltage changes per day 1 50 e Select the synchronous connection status Yes or No Yes for a system with a synchronous connection to another system No if there is no such synchronous connection e Select the number of allowed long interruptions 0 100 e Select how often RMS is updated for rapid Voltage data source 1 cycle 10 12 cycles e Select the upper limit for the supply Voltage unbalance less than or equal to 296 or 396 e Select the Voltage dip concern threshold greater than or equal to 10 85 e Select the first day of the week Sunday or Monday e Enter the Mains signalling threshold e Enter the Mains signalling Interharmonic frequency Phase Conductors to Earth Thresholds in percentage of Full Scale e Enter the value for A E B E and C E e Enter the value for N E 5 Click OK 6 Click Update Device to send the new settings to the meter and return to
46. 2 2 P 3 4 3 P 10s 6 P 8 P 10 P 13 P 17 5 505 30 50 80 3 The 3 second memory time constant in the flicker meter ensures that P 0 1 cannot change abruptly and no smoothing is needed for this percentile Long Term Flicker Evaluation The 10 minute period on which the short term flicker severity is based is suitable for short duty cycle disturbances For flicker sources with long and variable duty cycles e g arc furnaces it is necessary to provide criteria for long term assessment For this purpose the EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 10 2 1 Summary CHAPTER 10 FLICKER ANALYSIS long term Plt is derived from the short term values over an appropriate period By definition this is 12 short term values of 10 minutes each over a period of 2 hours The following formula is used EQ 10 2 where Psti i 1 2 3 are consecutive readings of the short term severity Pst Flicker changes in the illumination of light sources due to cyclical voltage variations Pinst instantaneous flicker values in perceptibility units PU Pst value based on 10 minute analysis value based on 12 Pst values Measurement Procedure 1 Original signal with amplitude variations 2 Square demodulator 3 Weighted filter 4 Low pass filter 1st order 5 Statistical computing Data available Pst Pst Max Pst Min values for long term recording Plt Max
47. 33 mm or thicker and ground the shield preferably at one location only e Establish point to point configurations for each device on a RS485 bus connect terminals to terminals connect terminals to terminals e Connect up to 31 meters on a single bus using RS485 Before assembling the bus each meter must have a unique address refer to Chapter 19 of the GE Communicator User Manual for instructions Protect cables from sources of electrical noise Avoid both Star and Tee connections see Figure 5 5 e Connect no more than two cables at one point on an RS485 network whether the connections are for devices converters or terminal strips e Include all segments when calculating the total cable length of a network If you are not using an RS485 repeater the maximum length for cable connecting all devices is 4000 feet 1219 meters e Connect shield to RS485 Master and individual devices as shown in Figure 5 4 You may also connect the shield to earth ground at one point Termination Resistors RT may be needed both ends for longer length transmission TICE lines However since the meter has some level of termination internally Termination Resistors may not be needed When they are used the value of the Termination Resistors is determined by the electrical parameters of the cable Figure 5 4 shows a representation of an RS485 Daisy Chain connection Refer to Section 5 5 1 for details o
48. 45 connection allows an EPM 9900 meter to communicate with multiple PCs simultaneously The RJ45 jack is located on the back of the meter The EPM 9900 meter s Ethernet port conforms to the IEEE 802 3 10BaseT and 100BaseT specifications using unshielded twisted pair UTP wiring GE Digital Energy recommends 5 for cabling For details on this connection see the EPM 9900 Network Communications chapter The optional second Ethernet connection for the EPM 9900 meter consists of either an RJ45 E1 or a Fiber Optic E2 Communication card See Chapter 11 for details 5 3 ANSI Optical Port The Optical port lets the EPM 9900 meter communicate with one other device e g a PC Located on the left side of the meter s face it provides communication with the meter through an ANSI C12 13 Type Il Magnetic Optical Communications Coupler EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 5 1 CHAPTER 5 COMMUNICATION INSTALLATION 5 44 USB Connection The USB connection allows the EPM 9900 meter to communicate with a computer that has a USB 1 1 or USB 2 0 Host port The meter s USB port is configured to operate as a virtual serial communication channel that the PC sees as a simple COM port with a baud rate of up to 921600 The USB virtual serial communication channel e Supports legacy applications that were designed to only work with a serial communication channel e Is compatible with standard USB cables that terminate with a USB Type B
49. 4cm CHAPTER 11 USING THE I O OPTIONS Figure 11 8 1 0 Modules Front View Mounting Bracket 6 879 13 088cm e Power In Be JING A 3 437 8 729cm Power Supply Max Power 12 VA 2 2007 5 588cm Input Voltage 12 60V DC o 90 240V Ac Dc eo e 9 9 99 999 Output Voltage 12V DC 618 1 570cm 1 3017 3 305cm Each I O module in a group must be assigned a unique address See the GE Communicator User Manual for instructions on configuring and programming the modules Starting with the left module and using a slotted screwdriver fasten the first O module to the left mounting bracket The left mounting bracket is the one with the PEM Fasten the internal screw tightly into the left mounting bracket Slide the female RS485 port into the male RS485 side port to connect the next I O module to the left module Fasten together enough to grab but do not tighten yet Combine the modules together one by one Attach a PSIO power supply to the right of each group of I O modules it is supplying with power see Figure 11 6 The PSIO supplies 12 VA at 125 V AC DC See sections 11 8 6 11 8 8 for I O modules power requirements Once you have combined all of the I O modules together for the group fasten them tightly This final tightening locks the group together as a unit Attach the right mounting bracket to the right side of the group using the small Phillips Head screws provided Mo
50. CHAPTER 10 FLICKER ANALYSIS 10 6 Polling through Communications The Pinst Pst Pst Max Pst Min Plt Max Min values can be polled through the communications port Refer to the EPM 9900 meter s Modbus and DNP Mapping manuals for register assignments and data definitions 10 7 Log Viewer 1 Click the Open Log icon from GE s Communicator Icon bar 2 Log Viewer opens Using the menus at the top of the screen select a meter time ranges and values to access 3 Click the Flicker icon The values and the associated time stamps when the values occurred are displayed in a grid box Use the buttons at the bottom of the screen to create a graph or export the data to another program e Graphed values include Pst and Plt Va Vb and Vc e Displayed values include Pst and Plt Max and Min for Va Vb and Vc Max and Min values are only displayed they cannot be graphed However Max and Min values are available for export NOTE 10 8 Performance Notes e Pst and average time are synchronized to the clock e g for a 10 minute average the times will occur at 0 10 20 etc The actual time of the first average can be less than the selected period to allow for initial clock synchronization fthe wrong frequency is chosen e g 50Hz selection for a system operating at 60H2 flicker will still operate but the computed values will not be valid Therefore you should select the frequency setting with care e User setti
51. DISCONNECTING DEVICE FOR THE EQUIPMENT EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 4 ELECTRICAL INSTALLATION 4 2 CT Leads Terminated to Meter The EPM 9900 meter is designed to have current inputs wired in one of three ways Figure 4 1 shows the most typical connection where CT Leads are terminated to the meter at the current gills This connection uses nickel plated brass rods with screws at each end This connection allows the CT wires to be terminated using either an O or a U lug Tighten the screws with a 2 Phillips screwdriver Torque 8 Lb In Figure 4 1 CT Leads terminated to Meter 8 Screw for Lug Connection Nickel plated brass rod Current gills Other current connections are shown in sections 4 2 and 4 3 Voltage and RS485 KYZ connections can be seen in Figure 4 4 Wiring diagrams are shown in the Wiring Diagrams section of this chapter Communications connections are detailed in the Communication Installation chapter For sustained loads greater than 10 Amps use pass through wiring method Section NO TICE 4 3 using 10 AWG wire EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 3 4 4 CHAPTER 4 ELECTRICAL INSTALLATION 4 3 CT Leads Pass Through No Meter Termination The second method allows the CT wires to pass through the CT inputs without terminating at the meter In this case remove the current gills and place the CT wire directly through the CT opening
52. Date Time 2012 05 07 15 08 56 Pulse Accumulations source Totals 3 40 07 3 40 07 AccumulatorS o 9 2012 13 40 07 anion 2032 04 29 12 40107 Accumulators 0 9 2012 04 19 13 40107 Totals Average Maximum Timestamp e Digital Energy 7 Toview Inputs data click Inputs on the left side of the webpage You see the webpage shown below sees cm Gee Bee Multilin EPM 9900 POWER METERING SYSTEM Volte Ampe Power Lnergy Power Quelty Puise Accemeletion Inputs Meter Information Omet Diagnostic Tools Inputs Meter Name 0000000089977949 Date Time 2012 05 07 15 10 13 Internal Digital Inputs 5 Input 1 Open Open HS Input 5 Open Open Open Digital Energy IET Og FPl w EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 9 7 CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 8 Toview general meter information click Meter Information on the left side of the webpage You see the webpage shown below 7 Meter Info ation Windows Int t Explor IO E E T T Multilin EPM 9900 POWER METERING SYSTEM Home Voits Amps Power Energy ed LR mI Meter Information Meter Information System Run Time Status CT Ratio 5 00 5 00 COM State PTRatio 120 00 120 00 DSPIState Hexthy System
53. EPM 9900 METER S TOUCH SCREEN DISPLAY Log Status Brings you to Logging Status information consisting of an overview of the meter s logs For each log the following information is listed The number of records Record size of memory used Log Name Records Record Size Memory Used Interval 01 Interval 02 Interval 03 Interval 04 Interval 05 Interval 06 2008 08 27 00 22 46 Touch the Next Previous arrows to view additional logs Firmware Version This screen displays the current firmware version for the EPM 9900 meter as well as the meter designation and serial number The following information is displayed e Device name e Serial number e Comm Boot 2 5075 e Comm Runtime 2 5145 DSP1 Boot 1 e 5 1 Runtime DV DSP2 S 0000 e FPGA 2 11 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY e Touch Screen 7 03 Firmware Version ft Device Hame SerialNumber 4000000000000003 COMM BOOT COMM RUNITME DSF1 BOOT DSF 1 RUNTIME DSP2 5 0000 FPGA TOUCH SCREEN 2011 06 03 13 27 28 DISPLAY SETTING Brings you to a screen where you can configure settings for the LCD display Set the following e Contrast touch Left Right arrows to increase decrease the contrast for the display e Backlight the number of minutes after use that the display s backlight turns off Touch Left Right arrows t
54. GE Energy Multilin EPM 9900 Electronic Meter Instruction Manual Software Revision 1 0x Manual P N 1601 0036 A1 Manual Order Code 113631 GE Digital Energy 215 Anderson Avenue Markham Ontario C Canada L6E 183 GE Multilin s Quality Tel 905 294 6222 Fax 905 201 2098 Internet http www gedigitalenergy com C UL US HA LISTED Copyright 2012 GE Multilin Inc All rights reserved Multilin EPM 9900 Electronic Meter Instruction Manual for product revision 1 0x The contents of this manual are the property of GE Multilin Inc This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Multilin The manual is for informational use only and is subject to change without notice Part number 1601 0036 1 April 2012 GENERAL SAFETY PRECAUTIONS EPM 9900 ANCAUTION e Failure to observe and follow the instructions provided in the equipment manual s could cause irreversible damage to the equipment and could lead to property damage personal injury and or death Before attempting to use the equipment it is important that all danger and caution indicators are reviewed fthe equipment is used in a manner not specified by the manufacturer or functions abnormally proceed with caution Otherwise the protection provided by the equipment may be impaired and can result in Impaired operation and injury e Caution H
55. NPUT 1 INPUT 2 INPUT 3 INPUT 4 INPUT 5 oacuadco lt INPUT 6 INPUT 7 INPUT 8 11 8 2 Installing Optional External I O Modules modules must use the EPM 9900 meter s ports 3 or 4 Six feet of RS485 cable harness is supplied Attach one end of the cable to the port connectors may not be supplied insert the other end into the communication pins of the module s male RS485 side port see Figure 11 2 See Section 11 8 4 1 for details on using multiple modules Installing the External I O Modules 1 Connect the and terminals on the EPM 9900 meter to the and terminals of the male RS485 port 2 Connectthe shield to the shield S terminal The S terminal on the EPM 9900 meter is used to reference the EPM 9900 meter s port to the same potential as the source It is not an earth to ground connection You must also connect the shield to earth ground at one point 4 Puttermination resistors at each end connected to the 4 and lines RT is 120 Ohms EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 11 11 8 3 11 12 Power Source for External I O Modules CHAPTER 11 USING THE I O OPTIONS Connect a power source to the front of the module The EPM 9900 meter does not have internal power for the external I O modules You must use a power supply such as the GE Digital Energy PSIO
56. NS M TIE Am 9 3 ORR CONNECTION Lec 9 3 Darm ce 9 5 VIEWING WEBPAGES 9 5 10 FLICKER ANALYSIS EE 10 1 1 4 cC 10 1 SUMMARY A w 10 3 EN50160 IEC61000 4 30 FLICKER LOGGING 10 4 IEC61000 4 30 HARMONIC AND INTERHARMONIC LIMITS SCREEN 10 7 EN50160 IEC61000 4 30 FLICKER POLLING SCREEN tnn 10 8 POLLING THROUGH COMMUNICATIONS anaana 10 11 10 11 PERFORMANCE NOTES 10 11 11 USING THE I O E Gne iuc UEM MEM E MM ELEME cni ED CMM M EM Sl HM 11 1 OPTIONS INSTALLING OPTION CARDS dE neo clip LE pre b 11 2 LONFRSURINO OPTION CARDS ERN MPH ER pan NA 11 2 PULSE OUTPUT RS485 OPTION CARD S OPTION 11 3 PULSE OUTPUT RS485 OPTION CARD S OPTION WIRING 11 4 ETHERNET OPTION CARD RJ45 OR FIBER OPTIC 11 5 RELAY OUTPUT OFTON CARDIRI 11 6 RELAY OUTPUT OPTION CARD R1 WIRING 11 7 DIOHSLINPEFAZFHON 7
57. OM Failure Bit 2 1 2 Checksum for Communications settings bad Bit 3 1 Checksum for Programmable settings bad Bit 4 1 1 or more Communications settings are invalid Bit 5 1 1 or more Programmable settings are invalid Bit 6 1 1 or more Programmable settings have been modified Bit 7 1 Forced default by reset value Bit 15 1 Normal operation of the device is disabled 11 8 9 Analog Input Modules Operating Temperature 20 to 70 4 to 158 F Factory Settings Modbus Address 8AI1 136 8AI2 140 8AI3 144 8AI4 148 Default Settings Reset Button Overview The Analog Input Modules 0x1 mA 0x20 mA 0 5 and 0 10 Vdc are available in 8 channel format Maximum registers per request read or write is 17 registers All inputs share a single common point This is also an isolated connection from ground 11 18 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE I O OPTIONS Normal Mode In Normal Mode the Input Module 1 Reads and averages the A D and adjusts values for process 2 2 Calculates the percentage of Input Value The percentage value of the Input is stored in Input Value Registers Registers 04097 to 04104 NOTE The device operates with the following default parameters Address 247 F7H Baud Rate 57600 Baud Transmit Delay Time 20 msec EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 19 11 20 CHAPTER 11 USING THE I O O
58. Option card Slot 2 settings Option card Slot 3 settings Option card Slot 4 settings See the example screen below The Back button returns you to the initial Fixed System screen Ethemet 1 Digital board Front panel Shot 1 EA0031 test passed RS485 zZ Pulse Out 4 Shot 2 EFAQO0S test passed Erherz TP Shot 3 Slat 4 baard Device Status This screen displays the following information COMM runtime state DSP1 state 5 2 state Meter On Time Ethernet port link state See the example screen below The Back button returns you to the initial Fixed System screen 6 4 STATE Healthy OSP1 STATE Healthy EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY System Message This screen displays any system messages The bottom of the screen will show Prev Page and Next Page buttons only if there is more than one page of messages See the example screen below SCREEN CONFIGURATION FILE USER RESOURCE FILE SYSTEM RESOURCE FILE SOME PICTURE FILE 15 HOT ASvAILSBLE SOME FONT FILE I AVAILABLE POLLED DATA FILE poll data 15 NOT AVAILABLE POLLED DATA FILE poll data 1 xml 15 NOT POLLED DATA FILE poll data 2 xml 15 NOT POLLED DATA FILE poll data 3 xml 15 NOT POLLED DATA FILE
59. PTIONS 11 9 Additional External I O Module Specifications Analog Transducer Signal Outputs Up to four modules can be used 1mAONA 4 Analog Outputs scalable bidirectional 1mAONS 8 Analog Outputs scalable bidirectional 20mAONA 4 Analog Outputs scalable 20mAONS 8 Analog Outputs scalable Digital Dry Contact Relay Outputs One module can be used 4RO1 4 Relay Outputs 10 Amps 125 Vac 30 Form C Digital Solid State Pulse Outputs Up to four modules can be used 1 4 Solid State Pulse Outputs Form A KYZ pulses Analog Transducer Inputs Up to four modules can be used 8AI1 8 Analog Inputs O to 1 mA scalable and bidirectional 8AI2 8 Analog Inputs to 20 mA scalable 8AI3 8 Analog Inputs 0 to 5 V DC scalable 8AI4 8 Analog Inputs O to 10 V DC scalable Other I O Module Accessories MBIO Bracket for surface mounting external 1 0 modules to any enclosure PSIO 12 V external power supply which is necessary whenever you are connecting an external I O module to a EPM 9900 meter EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter A Installing the USB Virtual Comm Port A 1 Introduction As mentioned in Chapter 5 GE Digital Energy provides a driver that allows you to configure the EPM 9900 meter s USB port as a Virtual Serial port The driver is on the CD that came with your meter Follow the instructions in this chapter to instal
60. STEM USER GUIDE TOC 1 Pn roS je USING TAE MULTINET 5 4 REMOTE COMMUNICATON 5 5 PROGRAMMING MODEMS FOR REMOTE COMMUNICATION 5 5 SELEC EEE NOLEN ero 5 6 RIOR SPEED INPUTS CONNECTION 5 7 i44 8 ee cc 5 8 TIME SYNCHRONIZAHON ALTERNATIVES d nad 5 10 6 USING THE EPM 9900 em PE EM 6 1 METER S TOUCH 6 1 SCREEN DISPLAY SUD LE ascia Ee DNI UN 6 7 7 TRANSFORMER niji vE 7 1 LOSS COMPENSATION EPM 9900 METERS TRANSFORMER LOSS COMPENSATION 7 4 LOSS COMPENSATION IN THREE ELEMENT INSTALLATIONS eere 7 4 8 TIME OF USE JOE wa 8 1 FUNCTION TAE CFM 9900 METERS TOU CALENDAR ead beris 8 1 TOU PRIOR SEASON ANO MONTH lop MM poni 8 2 UPDATING RETRIEVING AND REPLACING TOU CALENDARS rn 8 2 DAYLIGHT SAVINGS DEMAND 8 3 9 EPM 9900 NETWORK HARDWARE 9 1 COMMUNICATIO
61. TEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY HARMONICS SR Scroll Soom 100 0 2010 01 07 14 12 55 Touch Waveform to see the channel s waveform Touch Volts B to view the Harmonics screen for Phase B N voltage Use the Scroll Zoom radio buttons to select the mode of the directional arrows e If Scroll is selected the directional arrows move the axes horizontally vertically e f Zoom is selected the directional arrows cause the display to zoom in out Harmonics Brings you to the Waveform Real Time Graph showing the following information e Y THD e TDO current only e KFactor e Frequency HARMONICS 300 0 TET 2 40 0 a ie 4 1 B 0 J 0 120 0 15 24 32 Touch Spectrum to see the Harmonic Spectrum Analysis screen for the channel Touch Volts B to view the Harmonics screen for Phase B N voltage Alarms Brings you to Alarm Limits Status information consisting of the following e Current Limits settings for the meters ID 1 32 e For each ID number the type of reading value status and setting is shown EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 15 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY e The green rectangle indicates a Within Limits condition and the red rectangle indicates an Out of Limits condition e The first screen displays the settings for Meters ID 1 to 4 ALARMS 9 STATUS SETTING
62. TI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Real Time Trending Table A Table of logs for the selected channel Volts AN is shown here Touch Graphic to return to the Trending Graphic screen Touch Setting to select another log and or channel TRENDS 4 Begin 2008 0872 eee 13h VOLTS End 200870872 TIME LOGS TIME LOGS TIME LOGS 11 51 11 52 MI Lines 1 11 51 11 62 1 I 11 51 11 52 1 ge sel 11 51 11 53 I 11 54 15 l l l l l l l 1 E Lr1 ra m r2 o i T LI T LI 17 LI 2 T LI 11 51 11 53 11 54 11 52 11 53 11 54 11 52 11 53 11 54 11 52 11 53 11 54 nr 2008 08 26 13 12 40 r AB E ER oe oe uu uu um mm mm um um Em E mu mu mu mui mui ui n nAn A An NA nA A mu mu mu mu m m l Ir NA N gi A n ERI E ERI ER E us If password protection is enabled for the meter a keyboard screen displays when you press any channel button Use the keyboard to enter the password If a valid password is entered the Trend graphic Tables are displayed otherwise a message displays indicating that the password is invalid NOTE TRENDS 2n m 2009 5 04 11 PM EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 21 6 22 CHAPTER 6 USING THE
63. The calculated loss compensation values are added to or subtracted from the measured Watts and VARs The selection of adding or subtracting losses is made through the meter s profile when programming the meter see the following section for instructions The meter uses the combination of the add subtract setting and the directional definition of power flow also in the profile to determine how to handle the losses Losses will be added to or subtracted from depending on whether add or subtract is selected the Received Power flow For example if losses are set to Add to and received power equals 2000 kW and EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 7 TRANSFORMER LOSS COMPENSATION losses are equal to 20 kW then the total metered value with loss compensation would be 2020 kW for these same settings if the meter measured 2000 kW of delivered power the total metered value with loss compensation would be 1980 kW Since transformer loss compensation is the more common loss compensation method the meter has been designed for this application Line loss compensation is calculated in the meter using the same terms but the percent values are calculated by a different methodology EPM 9900 Meter Transformer Loss Compensation e Performs calculations on each phase of the meter for every measurement taken unbalanced loads are accurately handled e Calculates numerically eliminating the environmental effects that cause
64. U RE Pm 5 1 INSTALLATION MOUNTING THE EPM 9900 METER eere ononenoaeaen nonne 5 1 METER AND PANEL CUT OUT DIMENSIONS 5 2 MOUNTING INSTRUCTIONS m 5 2 MOUNTING THE OPTIONAL EXTERNAL I O MODULES ntes 5 4 4 ELECTRICAL SAFETY CONSIDERATIONS WHEN INSTALLING METERS 4 1 INSTALLATION GT LEADS TERMINATED TO METER o 4 3 CT LEADS PASS THROUGH NO METER TERMINATION 4 4 QUICK CONNECT CRIMP ON TERMINATIONS 4 5 WIRING THE MONITORED INPUTS AND VOLTAGES 4 6 GROUND ru rade etas 4 7 FUSING THE VOLTAGE CONNECTIONS 4 7 WIRING THE MONITORED INPUTS sirsie 4 7 WIRING THE MONITORED INPUTS CURRENTS 4 7 ISOLATING ACT CONNECTION REVERSAL rt EH tr mte obiter ib 4 8 INSTRUBIERIT POWER COMME EON trie 4 9 WIRING DIAGRAMS binas titii RE RU Pot EHE SR HE Dna UU RA 4 9 5 COMMUNICATION VERDI SN 5 1 INSTALLATION KMS AND FIBER ETHERNET CONNECTIONS 5 1 pas mcr 5 1 BE LEGS R 5 2 EPM 9900 MULTI FUNCTION POWER METERING SY
65. UIDE 2 11 CHAPTER 2 OVERVIEW AND SPECIFICATIONS OPTIONAL RS485 PORT SPECIFICATIONS RS485 Transceiver meets or exceeds EIA TIA 485 Standard P Two wire half duplex Min Input Impedance 96 Max Output Current 60 mA ISOLATION All Inputs to Outputs are isolated to 2500 VAC ENVIRONMENTAL RATING 20 to 70 30 80 up to 95 RH Non condensing Pollution 2 Maximum Rated 2000 M MEASUREMENT METHODS VOM Gs sessionis 5 High speed readings 200 msec Revenue accurate readings 1 sec COMMUNICATION 10 100BaseT Ethernet ANSI Optical Port USB 1 1 2 0 Port Full speed Optional through I O card slot Dual RS485 Serial Ports Second 10 100 BaseT Ethernet or 100Base FX Fiber Optic Ethernet Protocol M Modbus RTU Modbus ASCII DNP 3 0 Com Port Baud Rate 9600 to 115200 bps Com Port Address 1 247 Modbus protocol 1 655535 DNP protocol Data 8 Bit No Parity MECHANICAL PARAMETERS Dimensions see Chapter 3 WaN ena 5 9 105 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 2 OVERVIEW AND SPECIFICATIONS COMPLIANCE Test Ref
66. View Mounting Bracket uu 1 25 3 175cm 2x1125 4 7 2 85cm 0 125 3175cm 4 Mounting E a 4 2 10 77cm 3 5 3 6 CHAPTER 3 MECHANICAL INSTALLATION EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 4 Electrical Installation 4 1 Safety Considerations When Installing Meters e Installation of the EPM 9900 meter must be performed only by qualified personnel who follow standard safety precautions during all procedures Those personnel should have appropriate training and experience with high voltage devices Appropriate safety gloves safety glasses and protective clothing are recommended e During normal operation of the EPM 9900 meter dangerous voltages flow through many parts of the meter including Terminals and any connected CTs Current Transformers and PTs Potential Transformers all I O Inputs and Outputs and their circuits All Primary and Secondary circuits can at times produce lethal voltages and currents Avoid contact with any current carrying surfaces e Do not use the meter for primary protection or in an energy limiting capacity The meter can only be used as secondary protection e Do not use the meter for applications where failure of the meter may cause harm or death e Donotuse the meter for any application where there may be a risk of fire e meter terminals should be inaccessib
67. ault Gateway 0 0 0 0 NOTE You can use different settings for the main Network card check with your Network Administrator for the correct settings NOTE The main Network card and Network card 2 must be in different subnets 3 Once the above parameters have been set GE Communicator connects the network using a Device Address of 1 and the assigned IP Address when you follow these steps Open GE Communicator i Click the Connect icon in the icon tool bar The Connect screen opens iii Click the Network button at the top of the screen Enter the following information Device Address 1 Host The Network card s IP Address Network Port 502 Protocol Modbus TCP EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 9 3 CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS iV Click the Connect button at the bottom of the screen GE Communicator connects to the meter via the network Network Information Through Display You can see the Network settings through the meter s Touch Screen display 1 From the Main screen select Setting 2 Pressthe Next button twice to go to the Network Settings screen shown on the next page Click the button next to Network 1 to see the settings for the standard Ethernet connection Click the button next to Network 2 to see the settings for the second optional Network card if installed Network Setting 8 n Metwok 1 igh Network 2 IP ADDRESS 192 fice Jo 2
68. ave an average of the subintervals 12 00 12 05 and 12 05 12 10 which we know and 12 10 12 15 which we do not yet know As a guess we will use the last subinterval 12 05 12 10 as an approximation for the next subinterval 12 10 12 15 As a further refinement we will assume that the next subinterval might have a higher average 12096 than the last subinterval As we progress into the subinterval for example up to 12 11 the Predictive Window Demand will be the average of the first two subintervals 12 00 12 05 12 05 12 10 the actual values of the current subinterval 12 10 12 11 and the prediction for the remainder of the subinterval 4 5 of the 12096 of the 12 05 12 10 subinterval EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 2 OVERVIEW AND SPECIFICATIONS of Subintervals n Subinterval Length Len Partial Subinterval Length Cnt Prediction Factor Pct Len EE Len Len Cnt Len EQ 2 20 Len Cnt 1 n 2 EQ 2 21 n 2 Value Y Value gt Sub Partial Partial x Pct ee re qne x E x Pct Cnt n n n 1 1 2 4 2 Measured The EPM 9900 submeter provides the following Measured Values all in Real Time and some Values additionally as Avg Max and Min values Table 2 1 EPM 9900 Meter Measured Values Measured Values Real Time Avg Max Min Voltage L N X Voltage L L Current Per Phase Current Neutral Watts A B C To
69. ay Dewice Information Communication Settings Board Settings system Message Touch screen Calibration Back EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 1 NOTES CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY You will only see the System Message option if there are messages for you to view See the page 6 4 for additional information on the System Message screen If you want to calibrate the touch screen perform the following actions 1 Press and hold the Backlight button on the right front panel of the meter for about 2 seconds 2 Pressthe i button at the top of the Dynamic screen within ten seconds of pressing the Backlight button 3 You will see the Fixed System screens menu shown above Touch Touch Screen Calibration See the instructions for using the Touch Screen Calibration screen on page 6 5 Device Information This screen displays the following information about the EPM 9900 meter Device type Device name Serial number COMM boot version COMM runtime version DSP1 boot version DSP1 runtime version DSP2 runtime version FPGA version Touch screen version CF Compact Flash model CF Compact Flash serial number CF Compact Flash FAT type CF Compact Flash size V switch level enabled currently Sealing switch status Security Password status Current ran
70. azardous voltages can cause shock burns or death e nstallation service personnel must be familiar with general device test practices electrical awareness and safety precautions must be followed e Before performing visual inspections tests or periodic maintenance on this device or associated circuits isolate or disconnect all hazardous live circuits and sources of electric power e Failure to shut equipment off prior to removing the power connections could expose you to dangerous voltages causing injury or death All recommended equipment that should be grounded and must have a reliable and un compromised grounding path for safety purposes protection against electromagnetic interference and proper device operation e Equipment grounds should be bonded together and connected to the facility s main ground system for primary power e Keep all ground leads as short as possible Atall times equipment ground terminal must be grounded during device operation and service e In addition to the safety precautions mentioned all electrical connections made must respect the applicable local jurisdiction electrical code e Before working CTs they must be short circuited To becertified for revenue metering power providers and utility companies must verify that the billing energy meter performs to the stated accuracy To confirm the meter s performance and calibration power providers use field test standards to ensure that
71. between two or more devices connected on a network PT Ratio Potential Transformer Ratio used to scale the value of the voltage to the primary side of an instrument transformer Also referred to as VT Ratio Pulse The closing and opening of the circuit of a two wire pulse system or the alternate closing and opening of one side and then the other of a three wire system which is equal to two pulses Q Readings Q is the quantity obtained by lagging the applied voltage to a wattmeter by 60 degrees Values are displayed on the Uncompensated Power and Q Readings screen Quadrant Programmable Values and Factors on the 9900 meter Watt and VAR flow is typically represented using an X Y coordinate system The four corners of the X Y plane are referred to as quadrants Most power applications label the right hand corner as the first quadrant and number the remaining quadrants in a counter clockwise rotation Following are the positions of the quadrants 1st upper right 2nd upper left 3rd lower left and 4th lower right Power flow is generally positive in quadrants 1 and 4 VAR flow is positive in quadrants 1 and 2 The most common load conditions are Quadrant 1 power flow positive VAR flow positive inductive load lagging or positive power factor Quadrant 2 power flow negative VAR flow positive capacitive load leading or negative power factor Register An entry or record that stores a small amount of data
72. cept for the number of processes performed by the modules Both devices 1 Accept new values through communication 2 Output current loops scaled from previously accepted values The 0 to 1 mA module includes one more process in its Normal mode 3 Reads and averages the A D and adjust values for Process 2 above The device operates with the following default parameters Address 247 F7H Baud Rate 57600 Baud Transmit Delay Time 20 msec EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 15 CHAPTER 11 USING THE I O OPTIONS 11 8 7 Digital Dry Contact Relay Output Form C Module 11 16 Only one of these modules may be connected to a EPM 9900 meter 9 Digital Dry Contact Relay Output Module Specifications i ITE Default Settings Reset Button Transmit Delay Time 20 msec Overview The Relay Output module consists of four latching relay outputs In Normal mode the device accepts commands to control the relays Relay Output modules are triggered by limits programmed with the GE Communicator software See the GE Communicator User Manudl for details on programming limits Each latching relay will hold its state in the event of a power loss Communication Maximum registers per request read or write is 4 registers The device operates with the following default parameters Address 247 F7H Baud Rate 57600 Baud Transmit Delay Time 20 msec Normal Mode Normal mode consists of one process the dev
73. d without removing it from installation EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 2 OVERVIEW AND SPECIFICATIONS 2 2 DNPV3 00 Level 2 The EPM 9900 meter supports DNP V3 00 Level 2 over both serial and dual Ethernet ports DNP Level 2 Features Upto 136 measurements 64 Binary Inputs 8 Binary Counters 64 Analog Inputs can be mapped to DNP Static Points over 3000 in the customizable DNP Point Map Report by Exception Processing DNP Events Deadbands can be set on a per point basis Freeze Commands Available commands are Freeze Freeze No Ack Freeze with Time and Freeze with Time No Ack Freeze with Time Commands enable the EPM 9900 meter to have internal time driven Frozen and Frozen Event data When the EPM 9900 meter receives the time and interval the data is created Visit the GE website http www gedigitalenergy com for more details NOTE EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 3 2 3 1 2 4 Upgrading the Meter s Software Option Key CHAPTER 2 OVERVIEW AND SPECIFICATIONS 23 Software Option Technology The EPM 9900 meter is equipped with Software Option technology a virtual firmware based switch that allows you to enable meter features through software communication Software Option technology allows the unit to be upgraded after installation without removing it from service Available Software Option key upgrades e Software Option k
74. e clock GPS does not supply the year 3 Connect the terminal of the EPM 9900 meter to the terminal of the signal generating device connect the terminal of the EPM 9900 meter to the terminal of the signal generating device EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 5 COMMUNICATION INSTALLATION Troubleshooting Tip The most common source of problems is a reversal of the two wires If you have a problem try reversing the wires Figure 5 1 IRIG B Communication IRIG B Port IRIG B Time Signal Generating Device NO TICE Please make sure that the selected clock can drive the amount of wired loads EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 5 9 CHAPTER 5 COMMUNICATION INSTALLATION 5 11 Time Synchronization Alternatives See the GE Communicator User Manual for details IRIG B All EPM 9900 meters are equipped to use IRIG B for time synchronization e f IRIG B is connected this form of time synchronization takes precedence over the internal clock If the GPS Signal is lost the internal clock takes over time keeping at the precise moment the signal is lost Line Frequency Clock Synchronization All EPM 9900 meters are equipped with Line Frequency Clock Synchronization which may be enabled or disabled for use instead of IRIG B If Line Frequency Clock Synchronization is enabled and power is lost the internal clock takes over at the precise mome
75. eason and month is defined by a programmable start billing date which is also the end date of the prior season or month A season ends at midnight of the day before the start of the next season A month ends at midnight of the month s billing day If the year ends and there is no new calendar TOU accumulations stop The last accumulation for the year ends on 12 31 23 59 59 If a calendar is present for the following year TOU accumulations continue until the next monthly bill date or next start of season is reached Accumulation can span into the following year 8 5 TOU Prior Season and Month The EPM 9900 meter stores accumulations for the prior season and the prior month When the end of a billing period is reached the current season or month is stored as the prior data The registers are then cleared and accumulations resume using the next set of TOU schedules and register assignments from the stored calendar Prior and current accumulations to date are always available 8 4 Updating Retrieving and Replacing TOU Calendars GE Communicator software retrieves TOU calendars from the EPM 9900 meter or from the computer s hard drive for review and edit Up to a maximum of twenty yearly calendars can be stored in the EPM 9900 meter at any given time You may retrieve them one at a time a new calendar can be stored while a current calendar is in use Accumulations do not stop during calendar updates If a calendar is replaced while in u
76. ect to another module s male RS485 side port Male RS485 Side Port use to connect to the EPM 9900 meter s Port 3 or 4 or to another module s female RS485 side port See Figure 11 2 for wiring details I O Port used for functions specific to the type of module Size and pin configuration vary depending on the type of module Reset Button press and hold for three seconds to reset the module s baud rate to 57600 and its address to 247 for 30 seconds LEDs when flashing the LEDs signal that the module is functioning Mounting Brackets MBIO used to secure one or more modules to a flat surface Figure 11 2 1 0 Module Components Mounting Brackets MBIO Side Port Port Size and Pin Male RS485 Configuration Vary Side Port EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE I O OPTIONS 11 8 1 Port Overview All of the optional external 1 0 modules have ports through which they interface with other devices The port configurations are variations of the four types shown below Figure 11 3 External I O Module Ports Four Analog Outputs Eight Analog Outputs 0 1mA and 4 20mA 0 1mA and 4 20mA 3 spo 8 5 lt RESET Eight Analog Inputs Four Relay Outputs 0 1mA 0 20mA 0 5 or Four KYZ Pulse Outputs 0 10Vdc or Eight Status Inputs 5 Ed 5 I
77. em of numbers having 2 as its base digits O and 1 Block Window Avg Power The Block Fixed Window Average is the average power calculated over a user set time interval typically 15 minutes This calculated average corresponds to the demand calculations performed by most electric utilities in monitoring user power demand See Rolling Window Average Byte A group of 8 binary digits processed as a unit by a computer device and used especially to represent an alphanumeric character CBEMA Curve A voltage quality curve established originally by the Computer Business Equipment Manufacturers Association The CBEMA Curve defines voltage disturbances that could cause malfunction or damage in microprocessor devices The curve is characterized by voltage magnitude and the duration which the voltage is outside of tolerance See ITIC Curve Channel The storage of a single value in each interval in a load profile Cold Load Pickup This value is the delay from the time control power is restored to the time when the user wants to resume demand accumulation CRC Field Cyclic Redundancy Check Field Modbus communication is an error checksum calculation that enables a Slave device to determine if a request packet from a Master device has been corrupted during transmission If the calculated value does not match the value in the request packet the Slave ignores the request CT Current Ratio A Current Transformer Ratio
78. erage value every 15 minutes at 12 00 12 15 12 30 etc for power reading over the previous fifteen minute interval 11 45 12 00 12 00 12 15 12 15 12 30 etc EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 7 2 8 CHAPTER 2 OVERVIEW AND SPECIFICATIONS Rolling Sliding Window Demand Rolling Window Demand functions like multiple overlapping Block Window Demands The programmable settings provided are the number and length of demand subintervals At every subinterval an average arithmetic mean of power readings over the subinterval is internally calculated This new subinterval average is then averaged arithmetic mean with as many previous subinterval averages as programmed to produce the Rolling Window Demand Example With settings of 5 five minute subintervals subinterval averages are computed every 5 minutes 12 00 12 05 12 15 etc for power readings over the previous five minute interval 11 55 12 00 12 00 12 05 12 05 12 10 12 10 12 15 Further every 5 minutes the subinterval averages are averaged in groups of 5 12 00 12 05 12 10 12 15 etc to produce a fifteen 5x3 minute average every 5 minutes rolling sliding every 5 minutes 11 55 12 10 12 00 12 15 Thermal Demand Traditional analog Watt hour Wh meters use heat sensitive elements to measure temperature rises produced by an increase in current flowing through the meter A pointer moves in proportion to the te
79. erence Standard Level Class Electrostatic Discharge EN IEC61000 4 2 Level 3 RF immunity EN IEC61000 4 3 10 V m Fast Transient Disturbance EN IEC61000 4 4 Level 3 Surge Immunity EN IEC61000 4 5 Level 3 Conducted RF Immunity EN IEC61000 4 6 Level 3 Radiated amp Conducted Emissions EN IEC61000 6 4 Class A CISPR 11 Power magnetic frequency EN IEC61000 4 8 Level 4 Voltage Dip amp interruption EN IEC61000 4 11 0 40 70 80 dips 250 300 cycle interrupts Power quality measurement IEC61000 4 50 Class A Harmonics EN IEC61000 4 2 Class A Flicker Limits EN IEC61000 3 3 APPROVALS Applicable Council Directive According to CE compliance Low voltage directive EN IEC61010 1 EMC Directive EN61000 6 2 EN61000 6 4 North America cULus Listed UL61010 1 PICQ C22 2 No 61010 1 PICQ7 ISO Manufactured under a registered quality program 1509001 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 7 Test conditions e 25 5 phase balanced load 50 or 60 Hz as per order e 5A Class 10 Nominal unit CHAPTER 2 OVERVIEW AND SPECIFICATIONS Accuracy For full Rating specifications see 2 6 Specifications Parameter Accuracy Accuracy Input Range Voltage L N V 0 196 of reading 69 to 480 V Voltage L L V 0 296 of reading 120 to 600 V Current Phase A 0 196 of reading 0 15 to 5
80. es EN 50160 H__oy yoye y1 oaij4j4j4j444qxg Allowed Rapid Voltage changes day Synchronous Connection Allowed long interruptians in a pear Rapid voltage change data source AMS updated every Supply voltage unbalance upper limit Less than or equal to Voltage dip concern threshold Greater than or equal to First day of week Maing Signalling Threshold Maine Signalling Interharmonics Frequency Phase Conductors to Earth Thresholds in percentage of fullecale B E and C E M E To enable Historical Logs and 8 press the Enable Logs and 8 button below If Historical Logs and 8 are reenabled 50160 logging will no longer be correct 3 The EPM 9900 meter uses Historical logs 7 and 8 to record the data required for EN50160 report generation when EN50160 1EC61000 4 30 logging has been enabled if it has not been enabled Historical logs 7 and 8 function in the same way as the other Historical logs You will see the first screen if EN50160 IEC61000 4 30 logging has not been enabled for the meter you will see the second screen if it has already been enabled e Ifyou see the first screen click Auto Configure Historical logs 7 and 8 will now be used for EN50160 1EC61000 4 30 logging only It takes a week for the meter to collect all the necessary data for the analysis NOTE If EN50160 1EC61000 4 30 recording is already active and you want to disable it click Enable Logs 7 and 8 This will disable the EN50
81. es of 208 120 and 480 277 where the first number represents the phase to phase voltage and the second number represents the phase to ground voltage Figure 1 1 Three Phase Wye Winding ld gt C The three voltages are separated by 120 electrically Under balanced load conditions with unity power factor the currents are also separated by 120 However unbalanced loads and other conditions can cause the currents to depart from the ideal 120 separation EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 1 THREE PHASE POWER MEASUREMENT Three phase voltages and currents are usually represented with a phasor diagram A phasor diagram for the typical connected voltages and currents is shown in Figure 1 2 Figure 1 2 Phasor diagram showing Three phase Voltages and Currents Vcn Vbn The phasor diagram shows the 120 angular separation between the phase voltages The phase to phase voltage in a balanced three phase wye system is 1 732 times the phase to neutral voltage The center point of the wye is tied together and is typically grounded Table 1 1 shows the common voltages used in the United States for wye connected Systems Table 1 1 Common Phase Voltages on Wye Services Phase to Ground Voltage Phase to Phase Voltage 120 volts 208 volts 271 volts 480 volts 2 400 volts 4 160 volts 7 200 volts 12 470 volts 7 620 volts 13 200 volts Usually a wye connected service w
82. ew of Real Time Readings consisting of the following e Volts AN BN CN AB BC CA e Amps A B C e Watts e VARS e VA e FREQ Real Time VOLTS AMPS E 10228 0 02 10236 0 01 00 ic 0 01 ogam 1 43 2008 08 27 00 18 31 Volts Brings you to Voltage readings details consisting of the following e Realtime Volts AN BN CN AB BC CA e Maximum Volts AN BN CN AB BC CA e Minimum Volts AN BN CN AB BC CA Realtime Voltage Realtime Maximum 111 48 0 00 volts B 111 47 228 1 0 00 111 43 228 15 0 00 volts 0 00 94 92 0 00 Volts 0 00 32 25 0 00 Touch or PH E to view details of Phase to Neutral Phase to Phase or Phase to Earth readings 6 8 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Volts Voltage Readings PH N Volts AN BN CN Touch the Back button to return to the Volts screen gt Touch the Next Previous arrows to go to Voltage Reading PH PH and Current Reading A B C Touch the Home button to go to the Dynamic Home screen Realtime Voltage e m 4 VOLTS 177 31 BN 76 50 177 37 2008 08 27 00 26 06 Volts Voltage Readings PH PH Volts AB BC CA Touch Back to return to the Volts screen Touch Next Previous arrows to go to Voltage Reading PH E and PH N Readings Touch the Home button to go to the Dyna
83. exception of the Logo screen all of the Dynamic screens have buttons on the top that allow you to navigate to the Fixed Main screen the next screen in sequence the previous screen and the Dynamic Main screen There is also a Play Pause button that stops and starts the scrolling between Dynamic screens You can adjust the screen rotation which lets you mount the meter vertically and you can select English or Spanish for the display language see Display Settings 6 23 for instructions Home Screen This is the first Dynamic screen shown after the system boots up Touch the buttons to access the following screens Trends the Dynamic Trends screen Alarms the Dynamic Alarms screen Real Time the Real Time Readings screen Power Quality the Harmonics screen Main the Dynamic Main screen TRENDS POWER QUALITY 2011 09 25 00 11 13 Dynamic Main Screen This is a navigation screen for the Dynamic screens that are in scroll mode lt TO IS Hn al n a SENE 2000 LOGO ENERGY BARGRAPH REAL TIME TOU RESETS VOLTAGE PHASOR TRENDS CURRENT HARMONICS LOG STATUS POWER ALARMS DEMAND FLICKER 2011 08 25 00 11 13 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 7 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Touch the button of the screen you want to access Each of the screens is described in the following sections Real Time Brings you to an overvi
84. ey 1 A Standard meter with 128 Megabytes memory 512 samples per cycle e Software Option key 2 B A plus 1 Gigabyte memory 1024 samples per cycle e Software Option key 3 C B plus 10MHz transient recording To upgrade your meter to a higher Software Option key e g B follow these steps 1 Toobtain a higher Software Option upgrade key contact Digital Energy s inside sales You will be asked for the following information e Serial number s of the meter you are upgrading e Desired Software Option upgrade e Credit card or Purchase Order number 2 Digital Energy will issue you the Software Option upgrade key To enable the key follow these steps Open GE Communicator software e Power up your EPM 9900 meter e Connect to the meter via GE Communicator See the GE Communicator User Manual for detailed instructions you can open the manual online by clicking Help Contents from the GE Communicator Main screen e Click Tools Change Software Option from the Title Bar of the Main screen A screen opens requesting the encrypted key e Enter the upgrade key provided by Digital Energy Click OK The Software Option key is enabled and the meter is reset EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 2 OVERVIEW AND SPECIFICATIONS 2 4 Measurements and Calculations The EPM 9900 meter measures many different power parameters Following is a list of the formulas used to perform calculations with samp
85. ge The current range class of the meter EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY See the example screen below The Back button returns you to the initial Fixed System screen Device Type 9900 Device Mame 9900 Serial 4 FFFFFFFFFFFFFFFF C t boot 25079 2 5149 5 1 boot 1 OSP1 runtime DU SP2 runtime FPGA Touch screen CF senal AF CF CF FAT FAT3Z CF SIZE 40760339057 v zuiEch 1 Sealing switch Mat installed Secunty Disabled Curent Range Class 20 Communication Settings This screen displays the following Communication port information RS485 Port 1 settings RS485 Port 2 settings USB port settings Optical port settings Ethernet Port 1 settings Ethernet Port 2 settings See the example screen below The Back button returns you to the initial Fixed System screen 4 57600 5 NONE 1 Modbus ATU 4 57600 5 NONE 1 Modbus RTU 1 115200 8 NONE 1 Modbus ATU 1 57600 8 1 Modbus ATU In 197 168 0 10 0 0 0 0 192 168 1 12 0 0 0 0 Board Settings This screen displays the following information Analogue board settings Ethernet 1 board settings Digital board settings EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 3 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Front panel settings Option card Slot 1 settings
86. h it was consumed The EPM 9900 meter s TOU function available with the GE Communicator software is designed to accommodate a variety of programmable rate structures The EPM 9900 meter s TOU function accumulates data based on the time scheme programmed into the meter See Chapter 10 of the GE Communicator User Manual for details on programming the EPM 9900 meter s 20 year TOU calendar and retrieving TOU data 8 2 TheEPM 9900 Meter s TOU Calendar An EPM 9900 TOU calendar sets the parameters for TOU data accumulation You may store up to twenty calendars in the EPM 9900 meter and an unlimited amount of calendar files on your computer The EPM 9900 TOU calendar profile allows you to assign a programmable usage schedule eg Weekday Weekend or Holiday to each day of the calendar year You may create up to 16 different TOU schedules Each TOU schedule divides the 24 hour day into fifteen minute intervals from 00 00 00 to 23 59 59 You may apply one of eight different programmable registers e 9 Peak Off Peak or Shoulder Peak to each fifteen minute interval The EPM 9900 meter stores e Accumulations on a seasonal basis up to four seasons per year weekly daily or hourly basis active frozen registers Accumulations on a monthly basis EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 8 1 CHAPTER 8 TIME OF USE FUNCTION Seasonal and monthly accumulations may span from one year into the next Each s
87. he Virtual Port 1 Open GE Communicator 2 Click the Connect icon You will see the Connect screen shown on the right Connect le Serial Port Network Baud Rate 9 Available Ports Ports Port COM1 Communications Port Protocol Flow Control Echo Mode 5 Click the Serial Port and Available Ports radio buttons and select the virtual COM Port To determine which COM Port is the USB virtual COM port follow these steps On your PC click Start Settings Control Panel ii Double click on the System folder System Properties System Restore Automatic Updates Remote General Computer Name Hardware Advanced Device Manager The Device Manager lists all the hardware devices installed on your computer Use the Device Manager to change the properties of any device Drivers Driver Signing lets you make sure that installed drivers are compatible with Windows Windows Update lets you set up how Windows connects to Windows Update for drivers Hardware Profiles Hardware profiles provide a way for you to set up and store different hardware configurations Hardware Profiles ii Click the Hardware tab You will see the screen shown on the right iv Click the Device Manager button You will see a list of your computer s hardware devices EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE
88. ice accepts new commands to control the relays EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE OPTIONS 11 8 8 Digital Solid State Pulse Output KYZ Module Mode Number Operating Temperature 20 to 70 4 to 158 F Memory 256 Byte IC EEPROM for storage of programmable settings and non volatile memory Default Settings Reset Button Overview The KYZ Pulse Output modules have 4 KYZ pulse outputs and accept Read and Write commands with at least 4 registers of data per command Digital Solid State Pulse Output KYZ modules are user programmed to reflect VAR hours WATT hours or VA hours NC Normally Closed NO Normally Open C Common Communication Maximum registers per request read or write is 4 registers The device operates with the following default parameters Address 247 F7H Baud Rate 57600 Baud Transmit Delay Time 20 msec Normal Mode Energy readings are given to the device frequently The device generates a pulse at each channel after a certain energy increase Normal operation consists of three processes 1 Thefirst process accepts writes to registers 04097 to 04112 Writes can be up to four registers long and should end on the fourth register of a group register 04100 or registers 04103 to 04112 or registers 04109 to 04112 These writes can be interpreted as two byte four byte six byte or eight byte energy readings The reception of the firs
89. ill have four wires three wires for the phases and one for the neutral The three phase wires connect to the three phases as shown in Fig 1 1 The neutral wire is typically tied to the ground or center point of the wye refer to Figure 1 1 In many industrial applications the facility will be fed with a four wire wye service but only three wires will be run to individual loads The load is then often referred to as a delta connected load but the service to the facility is still a wye service it contains four wires if you trace the circuit back to its source usually a transformer In this type of connection the phase to ground voltage will be the phase to ground voltage indicated in Table 1 1 even though a neutral or ground wire is not physically present at the load The transformer is the best place to determine the circuit connection type because this is a location where the voltage reference to ground can be conclusively identified EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 3 CHAPTER 1 THREE PHASE POWER MEASUREMENT 1 1 2 Delta Connection Delta connected services may be fed with either three wires or four wires In a three phase delta service the load windings are connected from phase to phase rather than from phase to ground Figure 1 3 shows the physical load connections for a delta service Figure 1 3 Three Phase Delta Winding Relationship A Vca B Ica In this example of a delta service three wires
90. ion in the EPM 9900 meter Refer to Appendix B of the GE Communicator User Manual for detailed explanation and instructions for using the Transformer Line Loss Compensation feature of the EPM 9900 meter The computational corrections used for transformer and transmission line loss compensation are similar In both cases no load losses and full load losses are evaluated and a correction factor for each loss level is calculated However the calculation of the correction factors that must be programmed into the meter differ for the two different applications For this reason the two methodologies will be treated separately in this chapter In the EPM 9900 meter Loss Compensation is a technique that computationally accounts for active and reactive power losses The meter calculations are based on the formulas below These equations describe the amount of active Watts and reactive VARs power lost due to both iron and copper effects reflected to the secondary of the instrument transformers Total Secondary Watt Loss Measured Voltage Cal point Voltage 2 x LWFE Measured Current Cal Point Current 2 96LWCU J x Full scale Secondary VA Total Secondary VAR Loss Measured Voltage Cal point Voltage 4 x LVFE Measured Current Cal Point Current 2 x LVCU x Full scale Secondary VA The Values for LWFE LWCU LVFE and LVCU are derived from the transformer meter information as demonstrated in the following sections
91. it Data size Protocol Tx delay Address Mode Serial Setting OPTICAL PORT LSB 485 1 R 485 2 lt prev NExT 2008 09 24 17 42 06 ee Touch Next Prev to go to the Network Setting Display Setting screens EPM 9900 Network Communication Settings Use the following fields to configure the meter s Network settings Network click the Radio Button next to Network 1 or Network 2 IP address Subnet mask Default gateway MAC address Network Setting Network 1 W Metwork 2 IP ADDRESS 132 fies o fiz Suse D o jo MAC ADRESS oo 2008 09 24 7 42 15 Touch Next Prev to go to the Display Setting Serial Setting screens 6 24 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 7 Transformer Loss Compensation 7 1 Introduction The Edison Electric Institute s Handbook for Electricity Metering Ninth Edition defines Loss Compensation as A means for correcting the reading of a meter when the metering point and point of service are physically separated resulting in measurable losses including I2R losses in conductors and transformers and iron core losses These losses may be added to or subtracted from the meter registration Loss compensation may be used in any instance where the physical location of the meter does not match the electrical location where change of ownership occurs Most often this a
92. l the driver and connect to the meter s Virtual port A 2 Installing the Virtual Port s Driver 1 Insert the EPM 9900 Meter Series CD into your PC s CD drive The screen shown below opens in your Browser 2 Click the EPM 9900 Technical Documents button The following screen opens in your browser 3 Click the USB Driver button 4 Thesetup program opens a DOS command screen on your PC as shown below You will see a message indicating that the driver is being installed C IDOCUME 1V OCALS TiTemp ckz TJUBYDPInst MonxB6 exe 32 bit 05 deterted C SDOCUME 1 LOCALS 1 Temp ckz_TJUS DPInstx 6 exe Installing driver Once the driver installation is complete you will see the following message on the DOS command screen 5 Press Enter The DOS screen closes EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE A 1 CHAPTER A INSTALLING THE USB VIRTUAL COMM PORT OCALS TiTemp ckz TJUBYDPInst MonxB6 exe 32 bit 05 deterted C SDOCUME 1 LOCALS 1 Tempckzez TJUS DPInstx 6 exe Installing driver FTDI CDM Driver Installation process completed Press enter 6 Plug a USB cable into your PC and the EPM 9900 meter s USB port You will see pop up message windows telling you that new hardware has been found and that it is installed and ready to use EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER A INSTALLING THE USB VIRTUAL COMM PORT A 3 Connecting to t
93. le after installation e Do not apply more than the maximum voltage the meter or any attached device can withstand Refer to meter and or device labels and to the Specifications for all devices before applying voltages e To prevent hazardous voltage conditions the use of fuse branch circuit protection for voltage leads and the power supply are required To prevent CT damage and potential injuries shorting blocks for CT circuits are required if the meter needs to be removed from service e Branch circuit protection size should be 15 Amps e For sustained loads greater than 10 Amps the CT wires should be wired directly through the CT opening pass through wiring method see CT Leads Pass Through No Meter Termination using 10 AWG wire EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 1 4 2 NOTICE CHAPTER 4 ELECTRICAL INSTALLATION IF THE EQUIPMENT IS USED IN A MANNER NOT SPECIFIED BY THE MANUFACTURER THE PROTECTION PROVIDED BY THE EQUIPMENT MAY BE IMPAIRED THERE IS NO REQUIRED PREVENTIVE MAINTENANCE OR INSPECTION NECESSARY FOR SAFETY HOWEVER ANY REPAIR OR MAINTENANCE SHOULD BE PERFORMED BY THE FACTORY DISCONNECT DEVICE The following part is considered the equipment disconnect device A SWITCH OR CIRCUIT BREAKER SHALL BE INCLUDED IN THE END USE EQUIPMENT OR BUILDING INSTALLATION THE SWITCH SHALL BE IN CLOSE PROXIMITY TO THE EQUIPMENT AND WITHIN EASY REACH OF THE OPERATOR THE SWITCH SHALL BE MARKED AS THE
94. les for Wye and Delta services Samples for Wye va Vc lg lp ln Samples for Delta Vab Vbe Vcg la lp ic Root Mean Square RMS of Phase Voltages N 2 number of samples For Wye x a b c EQ 2 1 Root Mean Square RMS of Line Currents N number of samples For Wye b c n For Delta x a b c EQ 2 2 Root Mean Square RMS of Line Voltages N number of samples For Wye x y a b or b c or c a N 2 2 Y EQ 2 3 For Delta xy ab bc ca VRMSxy EQ 2 4 Power Watts per phase N number of samples For Wye x a b c N 2 Vxi ty t 1 DOMI mc EQ 2 5 X N EQ 2 5 Apparent Power VA per phase For Wye x a b VA VRMS IRMS EQ 2 6 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 5 CHAPTER 2 OVERVIEW AND SPECIFICATIONS Reactive Power VAR per phase For Wye x a b VAR EQ 2 7 Active Power Watts Total number of samples For Wye Wr W EQ 2 8 For Delta N gt Cabe few w 2 9 Reactive Power Total N 2 number of samples For Wye VAR VAR VAR VAR EQ 2 10 For Delta EQ 2 11 N N i 2 2 Vams laus N Vans Irus N Apparent Power VA Total For Wye VA VA VA VA EQ 2 12 For Delta VA VAR EQ 2 13 Power Fac
95. licker logging 1 Select the Profile icon from GE Communicator s Icon bar 2 From the Device Profile screen double click Power Quality and Alarm Settings EN50160 1EC61000 4 30 Depending on your current setting you will see one of the following screens EN 50160 IEC 61000 Settings 61000 4 30 Class Nominal Voltage in secondary Range 40 to BOD Frequency IEC 61000 4 30 Flicker Short term test time PST Minutes Long term test time PLT Minutes EM 50160 Allowed Rapid Voltage changes day Synchronous Connection Allowed long interruptians in year Rapid voltage change data source AMS updated every Supply voltage unbalance upper limit Less than or equal to Voltage dip concern threshold Greater than or equal to First day of week Maing Signalling Threshold Maine Signalling Interharmonics Frequency Phase Conductors to Earth Thresholds in percentage of fullecale A E B E and LE For EM 50160 logging to work properly the log and Historical Logs Doing so will averwrite the current Limit and Historical Logs 7 Auto Confiqure button to automatically setup the PQ and Historical Lo EN 50160 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 10 FLICKER ANALYSIS IEC 61000 4 30 Class A Nominal Voltage in secondary Range 404 to 120 00 Frequency Hz IEC 61000 4 30 Flicker Short term test time FST Minutes Long term test time PLT Minut
96. ltage is generally the nominal voltage of the secondary or low voltage winding For three phase transformers these values will typically be the three phase rating and the phase to phase voltage All of the test measurements are based on these two numbers Part of the process of calculating the loss compensation percentages is converting the transformer loss values based on the transformer ratings to the base used by the meter EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 7 TRANSFORMER LOSS COMPENSATION Correct calculation of loss compensation also requires knowledge of the meter installation In order to calculate the loss compensation settings you will need the following information regarding the meter and the installation Number of meter elements Potential transformer ratio PTR Current transformer ratio CTR Meter base Voltage Meter base current This section is limited to application of EPM 9900 meters to three element metering installations As a result we know that Number of metering elements 3 Meter base Voltage 120 Volts Meter base current 5 Amps Three Element Loss Compensation Worksheet Date mfBankNo Bank No e LS Transformer Data from Transformer Manufacturer s Test Sheet pm peu qp coe KW eas d lS Enter 3 Phase or 1 Phase values If 3 Phase val
97. ment 4W Wye 2 5 Element 4W Wye O Direct 2 5 Element Connect 3W Open Delta 2 2 Element 3W Open Delta 0 Direct 2 2 Element Connect With optional CT for current measurement only EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 9 CHAPTER 4 ELECTRICAL INSTALLATION Figure 4 5 4 Wire Wye or Delta 3 Element Direct Connect with 4 CTs AB CN i A BCN OR See Wiring the Monitored Inputs Vaux section Optional CT for current measurement only 4 10 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 4 ELECTRICAL INSTALLATION Figure 4 6 4 Wire Wye or Delta 3 Element with 3 PTs and 4 CTs AB CN L C A BCN ON OR 2 B SERVICE DELTA 4WIRE 3 PTs 4 CTs See Wiring the Monitored Inputs Vaux section Optional CT for current measurement only EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 4 11 CHAPTER 4 ELECTRICAL INSTALLATION Figure 4 7 4 Wire Wye 2 5 Element with 2 PTs and 3 CTs AB CN A I va P C A SERVICE WYE 4WIRE 2 15 3CTS See Wiring the Monitored Inputs Vaux section 4 12 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 4 ELECTRICAL INSTALLATION Figure 4 8 4 Wire Wye 2 5 Element Direct Connect with 3 CTs CN Ale
98. mic Home screen Realtime Voltage e u ft VOLTS AB 101 81 BC 101 88 CA 0 00 2006 08 27 00 27 17 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 9 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Volts Voltage Readings PH E Volts AE BE CE NE Touch Back to return to the Volts screen Touch Next Previous arrows to go to Current Reading A B C and Voltage Reading PH PH Touch the Home button to go to the Dynamic Home screen Realtime Voltage e Li 114 28 114 28 114 29 Amps Brings you to current readings details consisting of the following Realtime current A B C Maximum current A B C Minimum current A B C D D Current calculated Nc measured Nm gt Maximum Current calculated Nc measured Nm D Minimum Current Calculated Nc Measured Nm Healtime Current el ul els al Realtime Maximum Minimum Amps A Amps B 0 01 Amps 0 00 Amps 0 02 0 01 2008 08 27 00 19 17 Touch A B C to view Currents Detail 6 10 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Amps Current Readings A B C Real Time Current A B C gt Touch Back to return to the Amps screen Touch Next Previous arrows to go to Voltage Reading PH N and Voltage Reading PH PH Touch the Home button to go to the Dynamic Home screen Healtime Current 75
99. mperature change providing a record of demand The pointer remains at peak level until a subsequent increase in demand moves it again or until itis manually reset The EPM 9900 meter mimics traditional meters to provide Thermal Demand readings Each second as a new power level is computed a recurrence relation formula is applied This formula recomputes the thermal demand by averaging a small portion of the new power value with a large portion of the previous thermal demand value The proportioning of new to previous is programmable set by an averaging interval The averaging interval represents a 9096 change in thermal demand to a step change in power Predictive Window Demand Predictive Window Demand enables the user to forecast average demand for future time intervals The EPM 9900 meter uses the delta rate of change of a Rolling Window Demand interval to predict average demand for an approaching time period The user can set a relay or alarm to signal when the Predictive Window reaches a specific level thereby avoiding unacceptable demand levels The EPM 9900 calculates Predictive Window Demand using the following formula Example Using the previous settings of 5 five minute intervals and a new setting of 12096 prediction factor the working of the Predictive Window Demand could be described as follows At 12 10 we have the average of the subintervals from 11 55 12 00 12 00 12 05 and 12 05 12 10 In five minutes 12 15 we will h
100. municator software through the Device Profile Transformer and Line Loss Compensation screen The GE Communicator software allows you to enable Transformer Loss Compensation for Losses due to Copper and Iron individually or simultaneously Losses can either be added to or subtracted from measured readings Refer to Appendix B in the GE Communicator User for instructions Loss compensation values must be calculated based on the meter installation As a result transformer loss values must be normalized to the meter by converting the base voltage and current and taking into account the number of elements used in the metering installation For three element meters the installation must be normalized to the phase to neutral voltage and the phase current in two element meters the installation must be normalized to the phase to phase voltage and the phase current This process is described in the following sections Loss compensation is based on the loss and impedance values provided on the transformer manufacturer s test report A typical test report will include at least the following information Manufacturer Unit serial number e Transformer MVA rating Self Cooled Test Voltage No Load Loss Watts Load Loss Watts or Full Load Loss Watts Exciting Current 100 voltage Impedance The transformer MVA rating is generally the lowest MVA rating the self cooled or OA rating of the transformer winding The test vo
101. n RS485 connection for the Multinet Figure 5 3 RS485 Daisy Chain Connection Master device Last Slave device N Slave device 1 Slave device 2 SH amhununum BEN mmm esos oss roov o v V TP Twisted pair shielded SH cable Twisted pair shielded SH cable Twisted pair shielded SH cable Earth Connection preferably at single location EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 5 3 CHAPTER 5 COMMUNICATION INSTALLATION Figure 5 4 Incorrect T and Star Topologies Ebo 1 Long stub results T connection that can cause interference problem Fg d s 5B o m E m T aini nd 3 8 cnbie pair nh nkcied fief cade Earth Dorae une kno es My Re EH Mester denen ae cause interference a d air hii 088 cones per B4 cnin 5 5 1 Using the The Multinet provides RS485 Ethernet connection allowing an EPM 9900 meter with the Multinet optional RS485 port to communicate with a PC See the Multinet Installation and Operation Manual for additional information 5 4 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 5 COMMUNICATION INSTALLATION 5 6 Remote Communication with RS485 Use either optional RS485 port on the EPM 9900 meter The link using RS485 is viable for up to 4000 feet 1219 meters Use GE Communica
102. ngs Time See Chapter 19 of the GE Communicator User Manual for instructions To set Demand intervals from the Device Profile menu click Revenue and Energy Settings Demand Integration Intervals and set the desired intervals See Chapter 19 of the GE Communicator User Manual for instructions To set Cumulative Demand Type from the Device Profile menu click Revenue and Energy Settings Cumulative Demand Type and select Block or Rolling Window Average See Chapter 19 of the GE Communicator User Manual for instructions 8 4 CHAPTER 8 TIME OF USE FUNCTION EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 9 EPM 9900 Network Communications 91 Hardware Overview The EPM 9900 meter can connect to multiple PCs via Modbus TCP over the Ethernet or via a DNP LAN WAN connection Figure 9 1 EPM 9900 Meter Connected to Network The EPM 9900 meter s Network is an extremely versatile communications tool It Adheres to IEEE 802 3 Ethernet standard using TCP IP EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 9 1 CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS e Utilizes simple and inexpensive 10 100BaseT wiring and connections e Plugs into your network using built in RJ45 jack s programmable to any IP address subnet mask and gateway requirements e Communicates using the industry standard Modbus TCP and DNP LAN WAN protocols Multiple simultaneous connectio
103. ngs are stored If flicker is enabled and power is removed from the meter flicker will still be on when power returns This can cause gaps in the logged data e The Max and Min values are stored and are not lost if the unit is powered down e Flicker meets the requirements of IEC 61000 4 15 IEC61000 4 30 and former IEC 868 Refer to those specifications for more details if needed Refer to chapters 16 and 17 in the GE Communicator User Manual for additional information EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 10 11 CHAPTER 10 FLICKER ANALYSIS 10 12 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 11 Using the I O Options 11 1 Overview The EPM 9900 meter offers extensive I O expandability With its four Option card slots you can easily configure the meter to accept new I O Option cards without removing it from its installation The EPM 9900 meter auto detects any installed Option cards The meter also offers multiple optional external 1 0 modules EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 1 CHAPTER 11 USING THE OPTIONS 11 2 Installing Option Cards The Option cards are inserted into their associated Option card slots in the back of the EPM 9900 meter IMPORTANT Remove Voltage inputs and power supply to the meter before performing card installation Figure 11 1 Inserting an
104. nnection 8 7 6 5 4 3 2 1 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 5 7 CHAPTER 5 COMMUNICATION INSTALLATION 5 10 IRIG B Connections IRIG B is a standard time code format that synchronizes event time stamping to within 1 millisecond An IRIG B signal generating device connected to the GPS satellite system synchronizes EPM 9900 meters located at different geographic locations EPM 9900 meters use an un modulated signal from a satellite controlled clock such as Arbiter 1093B For details on installation refer to the User s manual for the satellite controlled clock in use Below are installation steps and tips to help you Connection Connect the terminal of the EPM 9900 meter to the terminal of the signal generating device connect the terminal of the EPM 9900 meter to the terminal of the signal generating device Installation Set Time Settings for the meter being installed 1 From GE Communicator Device Profile menu Click General Settings Time Settings gt one of the Time Settings lines to open the Time Settings screen i Set the Time Zone and Daylight Savings Select AutoDST or Enable and set dates iii Click Update Device Profile to save the new settings See Chapter 19 of the GE Communicator User s Manual for details 2 Before connection check that the date on the meter clock is correct or within 2 Months of the actual date This provides the right year for th
105. nnections Fiber Optic Connection Relay Outputs E 5 O o 3 3 2 5 quum vez 8 4 High Speed Pulse ones Inputs Outputs Ethernet Card The cable required to terminate the voltage sense circuit should have an insulation rating greater than 600VAC and a current rating greater than 0 1 A Voltage inputs Wire type Solid or stranded Wire gauge 12 24 AWG for either solid or stranded wire Strip length 7 8 mm Torque 5 Lb In Power supply connections Wire gauge 12 18 AWG for either solid or stranded wire Torque 3 5 Lb In Branch circuit protection size should be 15 A EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 4 ELECTRICAL INSTALLATION 4 6 Ground Connections The meter s PE GND terminal should be connected directly to the installation s protective earth ground Use green or green with yellow jacketed AWG 12 2 5 mm wire for this connection 4 7 Fusing the Voltage Connections For accuracy of the readings and for protection GE Digital Energy requires using 0 25 Amp rated fuses on all voltage inputs The EPM 9900 meter allows measurement up to a nominal 347VAC phase to neutral and up to 600VAC phase to phase Potential Transformers PTs are required for higher voltages to insure proper safety Use a 5 Amp Slow Blow fuse on the power supply for control power 4 8 Wiring the Monitored Inputs Vaux The Voltage Auxiliary
106. non linear loads Devices such as computer power supplies variable speed drives and fluorescent light ballasts make current demands that do not match the sinusoidal waveform of AC electricity As a result the current waveform feeding these loads is periodic but not sinusoidal Figure 1 10 shows a normal sinusoidal current waveform This example has no distortion Figure 1 10 Non distorted current waveform 6 oM on MMC IDE c ME S ME _ 500 Un Q z t 0 gt t 2a 2 500 4 ser Oe alee Sun Figure 1 11 shows a current waveform with a slight amount of harmonic distortion The waveform is still periodic and is fluctuating at the normal 60 Hz frequency However the waveform is not a smooth sinusoidal form as seen in Figure 1 10 Figure 1 11 Distorted current wave 1500 1000 300 4 gt t Current amps 500 1000 eee P Poona The distortion observed in Figure 1 11 can be modeled as the sum of several sinusoidal waveforms of frequencies that are multiples of the fundamental 60 Hz frequency This modeling is performed by mathematically disassembling the distorted waveform into a EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 13 Current amps 250 200 15075 100 5 CHAPTER 1 THREE PHASE POWER MEASUREMENT collection of higher frequency waveforms These higher frequency waveforms are referred to as harmonics Figure 1 12 shows the c
107. ns via LAN can be made to the EPM 9900 meter You can access the EPM 9900 meter with SCADA MV90 and RTU simultaneously Multiple users can run GE Communicator software to access the meter concurrently EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 9 EPM 9900 NETWORK COMMUNICATIONS 9 2 Specifications The EPM 9900 meter s main Network card standard has the following specifications at 25 Number of Ports 1 Operating Mode 10 100BaseT Connection type RJ45 modular Auto detecting ransmit and receive Diagnostic feature Status LEDs for LINK and ACTIVE Number of simultaneous Modbus connections 8 8 total connections over both the main Network card and optional Network card 2 93 Network Connection Use standard CAT5E network cables to connect with the EPM 9900 meter The RJ45 line is inserted into the RJ45 port on the back of the meter see figure 9 1 Set the IP Address using the following steps Refer to the GE Communicator User Manual for more detailed instructions 1 From the Device Profile screen double click General Settings Communications then double click on any of the ports The Communications Settings screen opens 2 Inthe Network Settings section enter the following data The settings shown below are the default settings of the main Network card See Chapter 11 for the default settings of optional Network card 2 e IP Address 10 0 0 1 Subnet Mask 255 255 255 0 Def
108. ns over both simultaneous Ethernet connections Modbus connections Number of 2 TCP and 1 UDP per communication channel simultaneous DNP connections The general specifications are as follows Operating Modes 10 100BaseT or 100Base FX Operating 20 to 70 C Temperature Storage 30 to 80 Temperature Relative air Maximum 9596 non condensing humidity EMC Immunity EN61000 4 2 Interference weight Dimensions 0 75 x 4 02 x 5 49 inches W XH xL Card slot Option slot 2 Connection Type RJ45 modular Auto detectingtransmit and receive 10 100BaseT OR Duplex ST Receptacle 100Base FX Fiber Optic Specifications are as follows Fiber Mode Multimode Fiber 62 5 125 um Wavelength 1310 nm EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 5 11 6 CHAPTER 11 USING THE I O OPTIONS Default Configuration The EPM 9900 meter automatically recognizes the installed Option card during power up If you have not programmed a configuration for the Ethernet card the unit defaults to the following configuration Main Network card 1 E1 IP Address 10 0 0 1 Subnet Mask 255 255 255 0 Default Gateway 0 0 0 0 Optional Network card 2 E2 IP Address 10 0 1 1 Subnet Mask 255 255 255 0 Default Gateway 0 0 0 0 The IP addresses of the EPM 9900 meter s standard main Network card and optional Network Card 2 must be in different subne
109. nt power is lost Internal Clock Crystal EPM 9900 meters are equipped with internal clocks crystals which are accurate to 20ppm and which can be used if IRIG B is not connected and or Line Frequency Clock Synchronization is not enabled DNP Time Synchronization e Using GE Communicator you can set the meter to request time synchronization from the DNP Master Requests can be made from once per minute to once per day Other Time Setting Tools Tools gt Set Device Time for manual or PC Time Setting Script amp Scheduler time Stamps Retrieved Logs and Data e MV90 can synchronize time on retrievals in the form of a time stamp refer to the GE Communicator User Manual HHF Converter for more MV 90 details EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 6 Using the EPM 9900 Meter s Touch Screen Display 6 1 Introduction The EPM 9900 meter s display is a QVGA 320 x 240 pixel LCD color display with touch screen capability The display screens are divided into two groups Fixed System screens e Dynamic screens 6 2 Fixed System Screens There are seven Fixed System screen options Device Information Communication Settings Board Settings Device Status System Message Touch Screen Calibration and CF S M A R T Tool In addition there is a Back option which brings you to the first Dynamic screen To view a screen touch the screen name on the displ
110. o increase decrease settings To turn the Backlight on press and hold the switch on the front panel beside the display for a few seconds e Volume touch Left Right arrows to increase decrease the speaker volume e Rotation degree touch Left Right arrows to set screen s rotation to 0 90 180 or 360 degrees This allows the meter to be mounted vertically Display Settings a Contrast 55 Ea Backlight min Eq Volume ra Rotation degree Eq Language 2011 06 03 13 27 53 e Language touch Left Right arrows to choose English or Spanish as the screen language You must press Apply for your Rotation and Language settings to be implemented Once you press Apply the screen darkens momentarily and then the Logo screen is redisplayed with the selected rotation language Touch Next Prev to go to the Serial Setting Network Setting screens EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 23 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY EPM 9900 Serial Communication Settings Select the serial communication mode you want to configure by checking the Radio Button to the left of it The setting for each port is described below Optical port Baud Parity Stop bit Data size Protocol Tx delay Address Mode USB Baud Parity Stop bit Data size Protocol Tx delay Address COMM 1 Baud Parity Stop bit Data size Protocol Tx delay Address COMM 2 Baud Parity Stop b
111. of the Modbus protocol that utilizes a different data transfer format This version is not dependent upon strict timing as is the RTU version This is the best choice for telecommunications applications via modems Modbus RTU The most common form of Modbus protocol Modbus RTU is an open protocol spoken by many field devices to enable devices from multiple vendors to communicate in a common language Data is transmitted in a timed binary format providing increased throughput and therefore increased performance Network A communications connection between two or more devices to enable those devices to send to and receive data from one another In most applications the network is either a serial type or a LAN type NVRAM Nonvolatile Random Access Memory able to keep the stored values in memory even during the loss of circuit or control power High speed NVRAM is used in the EPM 9900 meter to gather measured information and to insure that no information is lost Optical Port A port that facilitates infrared communication with a meter Using an ANSI C12 13 Type Il magnetic optical communications coupler and an RS232 cable from the coupler to a PC the meter can be programmed with GE Communicator software Packet A short fixed length section of data that is transmitted as a unit Example a serial string of 8 bit bytes Percent 96 THD Percent Total Harmonic Distortion See THD Protocol A language that is spoken
112. ontent of the harmonic frequencies that make up the distortion portion of the waveform in Figure 1 11 Figure 1 12 Waveforms of the harmonics 2100 4 S250 200 eb The waveforms shown in Figure 1 12 are not smoothed but do provide an indication of the impact of combining multiple harmonic frequencies together When harmonics are present it is important to remember that these quantities are operating at higher frequencies Therefore they do not always respond in the same manner as 60 Hz values Inductive and capacitive impedance are present in all power systems We are accustomed to thinking about these impedances as they perform at 60 Hz However these impedances are subject to frequency variation X and AC At 60 Hz w 377 but at 300 Hz 5th harmonic w 1 885 As frequency changes impedance changes and system impedance characteristics that are normal at 60 Hz may behave entirely different in presence of higher order harmonic waveforms Traditionally the most common harmonics have been the low order odd frequencies such as the 3rd 5th 7th and 9th However newer non linear loads are introducing significant quantities of higher order harmonics Since much voltage monitoring and almost all current monitoring is performed using instrument transformers the higher order harmonics are often not visible Instrument transformers are designed to pass 60 Hz quantities with high accuracy These device
113. ord is entered the reset takes place otherwise a message displays indicating that the password is invalid NOTE RESETS el 18 27 01 04 31 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 19 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Trends Brings you to the Trends Setting screen From this screen you can set the following for viewing Interval Log 1 or Log 2 touch the radio button of the log you want gt Channel select a channel by touching its button TRENDS o Interval Lag 1 Interval Log 2 WOLTS WOLTS AB VOLTS B WOLTS BC AMPS EB VOLTS C WOLTS AMPS 30 You will see the Trends Graphic screen NOTES e The active channel appears at the lower right of the display e Data from the previously active channel is lost if the channel is changed Real Time Trending Graphic Trending for the channel selected from the Trends Setting screen is shown on this screen e Touch the Directional arrows to see additional points on the graph You can view up to 240 points at a time Toseea table of logs for the Selected Channel touch Table to view the Trends Table screen e Touch Setting to select another log and or channel TRENDS a Begin 2008 08 28 13h WOLTS A End 2008 08 28 13h 11 57 11 45 11 51 11 56 12 07 15 2008 18 28 13 13 33 6 20 EPM 9900 MUL
114. poll data 4 xml 15 NOT POLLED DATA FILE poll data 5 xml 15 NOT AVAILABLE POLLED DATA FILE poll data amp xml 15 NOT POLLED DATA FILE poll data 7 xrml 15 POLLED DATA FILE poll data 8 xml 15 NOT POLLED DATA FILE poll data 98 xml 15 NOT POLLED OATS FILE poll data 10 15 NOT AwAILABLE Page 1 Prey Next The Back button returns you to the initial Fixed System screen NOTE This option only appears in the Fixed System screens menu if there are messages to display Touch Screen Calibration This screen is used to calibrate the touch screen display When you select this option a series of four messages directs you in performing screen calibration Each message tells you to touch a corner of the screen where a small crosshair is located Touching the crosshair calibrates the display Use a pointed tool to touch the calibration crosshairs See the example screen below showing the first of the four messages Calibrating Touch Screen Please touch the screen in the upper left crosshair When all four calibrations have been performed a Calibrating Test screen is shown EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 6 5 CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY Three crosshairs indicate places to touch After each touch a red crosshair is shown to verify the calibration If the calibration is correct p
115. ppears when meters are connected on the low voltage side of power transformers when the actual ownership change occurs on the high side of the transformer This condition is shown pictorially in the figure below Figure 7 1 Low Voltage Metering Installation Requiring Loss Compensation Ownership Change It is generally less expensive to install metering equipment on the low voltage side of a transformer and in some conditions other limitations may also impose the requirement of low side metering even though the actual ownership change occurs on the high voltage side EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 7 1 CHAPTER 7 TRANSFORMER LOSS COMPENSATION The need for loss compensated metering may also exist when the ownership changes several miles along a transmission line where it is simply impractical to install metering equipment Ownership may change at the midway point of a transmission line where there are no substation facilities In this case power metering must again be compensated This condition is shown in see figure below Figure 7 2 Joint Ownership Line Meeting Requiring Loss Compensation Point of Ownership Change A single meter cannot measure the losses in a transformer or transmission line directly It can however include computational corrections to calculate the losses and add or subtract those losses to the power flow measured at the meter location This is the method used for loss compensat
116. quiring both real power watts and reactive power VARs When the quadrature current leads the voltage the load is requiring real power watts but is delivering reactive power VARs back into the system that is VARs are flowing in the opposite direction of the real power flow e Reactive power VARs is required in all power systems Any equipment that uses magnetization to operate requires VARs Usually the magnitude of VARs is relatively low compared to the real power quantities Utilities have an interest in maintaining VAR requirements at the customer to a low value in order to maximize the return on plant invested to deliver energy When lines are carrying they cannot carry as many watts So keeping the VAR content low allows a line to carry its full capacity of watts In order to encourage customers to keep VAR requirements low most utilities impose a penalty if the VAR content of the load rises above a specified value EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 11 1 12 CHAPTER 1 THREE PHASE POWER MEASUREMENT A common method of measuring reactive power requirements is power factor Power factor can be defined in two different ways The more common method of calculating power factor is the ratio of the real power to the apparent power This relationship is expressed in the following formula Total PF real power apparent power watts VA This formula calculates a power factor quantity known as Total
117. r several other versions of Ethernet are also available Flicker Flicker is the sensation that is experienced by the human visual system when it is subjected to changes occurring in the illumination intensity of light sources IEC 61000 4 15 and former IEC 868 describe the methods used to determine Flicker severity Harmonics Measuring values of the fundamental current and voltage and percent of the fundamental 12T Threshold Data will not accumulate until current reaches programmed level Integer Any of the natural numbers the negatives of those numbers or zero Invalid Register In the EPM 9900 meter s Modbus Mop there are gaps between Registers For example the next Register after 08320 is 34817 Any unmapped Register stores no information and is said to be invalid ITIC Curve An updated version of the CBEMA Curve that reflects further study into the performance of microprocessor devices The curve consists of a series of steps but still defines combinations of voltage magnitude and duration that will cause malfunction or damage Ke kWh per pulse i e the energy kWh Kilowatt hours KW x demand interval in hours KYZ Output Output where the rate of changes between 1 and 0 reflects the magnitude of a metered quantity LCD Liquid Crystal Display LED Light Emitting Diode Maximum Demand The largest demand calculated during any interval over a billing period Modbus ASCII Alternate version
118. r Electricity Metering and the application standards for more in depth and technical coverage of the subject EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 1 1 1 1 Wye Connection CHAPTER 1 THREE PHASE POWER MEASUREMENT 11 Three Phase System Configurations Three phase power is most commonly used in situations where large amounts of power will be used because it is a more effective way to transmit the power and because it provides a smoother delivery of power to the end load There are two commonly used connections for three phase power wye connection or a delta connection Each connection has several different manifestations in actual use When attempting to determine the type of connection in use it is good practice to follow the circuit back to the transformer that is serving the circuit It is often not possible to conclusively determine the correct circuit connection simply by counting the wires in the service or checking voltages Checking the transformer connection will provide conclusive evidence of the circuit connection and the relationships between the phase voltages and ground The wye connection Is so called because when you look at the phase relationships and the winding relationships between the phases it looks like a wye Y Fig 1 1 depicts the winding relationships for a wye connected service In a wye service the neutral or center point of the wye is typically grounded This leads to common voltag
119. rcuit configurations involving delta connected loads EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 7 CHAPTER 1 THREE PHASE POWER MEASUREMENT Power Energy and Demand It is quite common to exchange power energy and demand without differentiating between the three Because this practice can lead to confusion the differences between these three measurements will be discussed Power is an instantaneous reading The power reading provided by a meter is the present flow of watts Power is measured immediately just like current In many digital meters the power value is actually measured and calculated over a one second interval because it takes some amount of time to calculate the RMS values of voltage and current But this time interval is kept small to preserve the instantaneous nature of power Energy is always based on some time increment it is the integration of power over a defined time increment Energy is an important value because almost all electric bills are based in part on the amount of energy used Typically electrical energy is measured in units of kilowatt hours kWh A kilowatt hour represents a constant load of one thousand watts one kilowatt for one hour Stated another way if the power delivered instantaneous watts is measured as 1 000 watts and the load was served for a one hour time interval then the load would have absorbed one kilowatt hour of energy A different load may have a constant power
120. record multiple cycles of all voltage and current waveforms in response to a transient condition EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 15 CHAPTER 1 THREE PHASE POWER MEASUREMENT 15 Power Quality Power quality can mean several different things The terms power quality and power quality problem have been applied to all types of conditions A simple definition of power quality problem is any voltage current or frequency deviation that results in mis operation or failure of customer equipment or systems The causes of power quality problems vary widely and may originate in the customer equipment in an adjacent customer facility or with the utility In his book Power Quality Primer Barry Kennedy provided information on different types of power quality problems Some of that information is summarized in Table 1 3 below Table 1 3 Typical power quality problems and sources Cause Disturbance Type Source Impulse Transient Transient voltage Lightning disturbance sub cycle Electrostatic discharge duration Load switching Capacitor switching Oscillatory transient with Transient voltage sub cycle Line cable switching decay duration Capacitor switching Load switching Sag swell RMS voltage multiple cycle Remote system faults duration Interruptions RMS voltage multiple System protection second or longer duration Circuit breakers Fuses Maintenance Undervoltage Overvol
121. rent simultaneously and calculate the individual phase and three phase power values The advantage of simultaneous sampling is the reduction of error introduced due to the difference in time when the samples were taken Figure 1 6 Three Phase Wye Load illustrating Kirchhoff s Law and Blondell s Theorem C B Phase B Phase C Phase A A N Blondell s Theorem is a derivation that results from Kirchhoff s Law Kirchhoff s Law states that the sum of the currents into a node is zero Another way of stating the same thing is that the current into a node connection point must equal the current out of the node The law can be applied to measuring three phase loads Figure 1 6 shows a typical connection of a three phase load applied to a threephase four wire service Krichhoff s Laws hold that the sum of currents A B C and N must equal zero or that the sum of currents into Node n must equal zero If we measure the currents in wires A B and C we then know the current in wire N by Kirchhoff s Law and it is not necessary to measure it This fact leads us to the conclusion of Blondell s Theorem that we only need to measure the power in three of the four wires if they are connected by a common node In the circuit of Figure 1 6 we must measure the power flow in three wires This will require three voltage coils and three current coils a three element meter Similar figures and conclusions could be reached for other ci
122. ress the Accept button otherwise press the Reject button which causes the calibration process to start again See the example screen below REJECT NOTE See page 6 1 for instructions on accessing Touch Screen Calibration CF S M A R T Tool This screen displays compact flash S M A R T Self Monitoring Analysis and Reporting Technology information The S M A R T must be supported and enabled to contain valid data The screen displays the following information 6 6 Compact flash model number Compact flash serial number Compact flash size in bytes Type of compact flash Regular S M A R T Status of S M A R T feature Supported Not Supported Enabled Disabled Status of S M A R T data Valid Invalid S M A R T Revision code S M A R T Firmware version and date code S M A R T number of Initial Invalid blocks number of bad Run Time blocks number of Spare blocks decimal S M A R T number of child pairs decimal Compact flash type SLC MLC Compact flash specification s maximum erase count 100000 if flash is SLC 5000 if flash is MLC Compact flash s average erase count Compact flash remaining 96 of life 100 Average erase count 100 Flash spec max erase count EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 6 USING THE EPM 9900 METER S TOUCH SCREEN DISPLAY 6 5 Dynamic Screens All of the Dynamic screens show the time and date at the bottom of the screen With the
123. rrent Wee TO For Transformer Voltage enter the Phase to Neutral value of Test Voltage previously calculated For Transformer Current enter the Full Load Current previously calculated For Multipliers enter the PT and CT multipliers previously calculated TrfIT Secondary is the Base Value of Voltage and Current at the Instrument Transformer Secondary of the Power Transformer These numbers are obtained by dividing the Transformer Voltage and Current by their respective Multipliers The Meter Trf values for Voltage and Current are obtained by dividing the Meter Base values by the TrflT Secondary values Load Loss at Transformer No Load Loss Watts kW 1 Phase kW No Load Loss No Load Loss VA kVA Exciting Current 1 Phase kVA Self Cooled Rating 100 Cd 100 kVA No Load Loss kVAR SORTI No Load Loss 2 No Load Loss kW 2 SQRT ja 2 SORTI E Full Load Loss Watts kW 1 Phase Kw Load Loss EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 7 TRANSFORMER LOSS COMPENSATION Full Load Loss VA kVA 968lmpedance 1 Phase kVA Self Cooled Rating 100 OO kVA Full Load Loss VAR KVAR SORT Full Load Loss kVA 2 Full Load Loss kW 2 SORT ja 2 SORTI SORTI Normalize Losses to Meter Base Quantity Value at M T Factor M T Factor Value M T Factor w Value at Trf Base Exp Meter Base No Load Loss V
124. rs Pst and Plt Flicker evaluation occurs in the following forms Instantaneous Short Term or Long Term Each form is detailed below Instantaneous Flicker Evaluation An output of 1 00 from Block 4 corresponds to the reference human flicker perceptibility threshold for 5096 of the population This value is measured in perceptibility units PU and is labeled Pinst This is a real time value that is continuously updated Short Term Flicker Evaluation An output of 1 00 from Block 5 corresponding to the Pst value corresponds to the conventional threshold of irritability per IEC 61000 3 3 2008 edition 2 and EN61000 3 5 2008 In order to evaluate flicker severity two parameters have been defined one for the short term called Pst defined in this section and one for the long term called Plt defined in the next section The standard measurement time for Pst is 10 minutes Pst is derived from the time at level statistics obtained from the level classifier in Block 5 of the flicker meter The following formula is used P 40 0314 F 0 0525 B 0 0657 P 0 28 FP 0 08 Po EQ 10 1 where the percentiles P 0 1 P 1 P 3 P 10 P 50 are the flicker levels exceeded for 0 1 1 2 20 and 5096 of the time during the observation period The suffix S in the formula indicates that the smoothed value should be used The smoothed values are obtained using the following formulas P 1s 7 P 1 1 5 3 P 3s P
125. s when designed for accuracy at low frequency do not pass high frequencies with high accuracy at frequencies above about 1200 Hz they pass almost no information So when instrument transformers are used they effectively filter out higher frequency harmonic distortion making it impossible to see EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 1 THREE PHASE POWER MEASUREMENT However when monitors can be connected directly to the measured circuit such as direct connection to 480 volt bus the user may often see higher order harmonic distortion An important rule in any harmonics study is to evaluate the type of equipment and connections before drawing a conclusion Not being able to see harmonic distortion is not the same as not having harmonic distortion It is common in advanced meters to perform a function commonly referred to as waveform capture Waveform capture is the ability of a meter to capture a present picture of the voltage or current waveform for viewing and harmonic analysis Typically a waveform capture will be one or two cycles in duration and can be viewed as the actual waveform as a spectral view of the harmonic content or a tabular view showing the magnitude and phase shift of each harmonic value Data collected with waveform capture is typically not saved to memory Waveform capture is a real time data collection event Waveform capture should not be confused with waveform recording that is used to
126. s INC CI Closed INO CJ Open General Specifications for Pulse Output RS485 Board Maximum 9596 non condensing Continuous load current 120 mA Weight 2 4 OZ Dimensions inches W x H x L 0 75 x 4 02 x 4 98 Card slot Option slot 1 External Connection Wire range 16 to 26 AWG Strip Length 0 250 Torque 2 2 Ib in 18 pin 3 5 mm pluggable terminal block EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 3 CHAPTER 11 USING THE OPTIONS 11 4 1 Pulse Output RS485 Option Card S Option Wiring 2 gt 2490 NO 7 C RELAY CONTACTS 0 NO C NC c NC z O Z y NOTE Refer to the Communication Installation chapter for RS485 setting instructions NOTE 11 4 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE OPTIONS 11 5 Ethernet Option Card RJ45 E1 or Fiber Optic E2 The Ethernet Option card provides data generated by the meter via Modbus It can be factory configured as a 10 100BaseT or as a 100Base FX Fiber Optic communication port Refer to Chapter 19 of the GE Communicator User Manual for instructions on performing Network configuration See Chapter 9 of this manual for details on configuring the standard main Network card The technical specifications at 25 are as follows Operating rate 10 100Mbit Diagnostic feature Status LEDs for LINK and ACTIVE Number of 8 Includes 8 total connectio
127. s a critical component of the total power picture because almost all real life applications have an impact on reactive power Reactive power and power factor concepts relate to both load and generation applications However this discussion will be limited to analysis of reactive power and power factor as they relate to loads To simplify the discussion generation will not be considered power and energy is the component of power that is the combination of the voltage and the value of corresponding current that is directly in phase with the voltage However in actual practice the total current is almost never in phase with the voltage Since the current is not in phase with the voltage it is necessary to consider both the inphase component and the component that is at quadrature angularly rotated 900 or perpendicular to the voltage Figure 1 9 shows a single phase voltage and current and breaks the current into its in phase and quadrature components Figure 1 9 Voltage and complex current e The voltage V and the total current I can be combined to calculate the apparent power or VA The voltage and the in phase current IR are combined to produce the real power or watts The voltage and the quadrature current IX are combined to calculate the reactive power The quadrature current may be lagging the voltage as shown in Figure 1 9 or it may lead the voltage When the quadrature current lags the voltage the load is re
128. s applied to the Va Vb and Vc terminals Table of contents 1 THREE PHASE TAREE PRASE SYSTEM CONFIGURA HOND uasa irit 1 2 POWER VV VE 1 2 MEASUREMENT NUR 1 4 BLONDELL S THEOREM AND THREE PHASE MEASUREMENT 1 6 uit ud Mau cie PAR 2 p Ser 1 8 REACTIVE ENERGY AND POWER FACTOR 1 11 wu e aoin aeiia 1 13 9 eR E 1 16 2 OVERVIEW AND MEIERUVENVIEE 2 1 SPECIFICATIONS PAE ee I Eo soto dene MUERE ER MEE 2 1 E CE ERE E N RECRUITMENT 2 5 SOFTWARE OPTION TECHNOLOGY eese etntntntntnetntntntntntnteneneneni 2 4 UPGRADING THE METER S SOFTWARE OPTION KEY 2 4 MEASUREMENTS AND CALCULATIONS 2 5 DEMAND INTEGRATORS ote Ira A LI 2 7 Miss 2 9 PIT VAP EKA EMA iM G 2 10 GRUER gt bol TENERE MEN 2 10 FEIRA aa EE 2 11 ACCURACY FOR FULL RATING SPECIFICATIONS SEE 2 6 Specifications 2 14 3 MECHANICAL s N
129. s section for meter certification details 2 1 1 Meter Revenue Metering Features Delivers laboratory grade 0 0696 Watt hour accuracy at full load Unity PF in a field mounted device Auto calibrates when there is a temperature change of more than 1 5 e Meets ANSI C12 and IEC 62053 22 accuracy specifications for Class 20 meters e Adjusts for transformer and line losses using user defined compensation factors e Automatically logs time of use for up to eight programmable tariff registers Counts pulses and aggregates different loads Power Quality e Records up to 1024 samples per cycle on an event on all inputs e Records sub cycle transients on voltage or current readings e Records high speed voltage transients at a 50MHz sample rate with accuracy to 10MHz e Offers inputs for neutral to ground voltage measurements e Synchronizes with IRIG B clock signal e Measures Flicker per IEC 61000 4 15 and IEC 61000 4 30 Class A standards Flicker analysis is available for Instantaneous Short Term and Long Term forms See Chapter 10 for more details EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 1 CHAPTER 2 OVERVIEW AND SPECIFICATIONS RTU Features Advanced monitoring capabilities that provide detailed and precise pictures of any metered point within a distribution network Extensive I O capability that is available in conjunction with all metering functions I O includes Optional Relay Output card with 6
130. se the accumulations for the current period will continue until the set end date At that point the current time will become the new start time and the settings of the new calendar will be used Reset the current accumulations if you replace a calendar in use A reset clears only the current accumulation registers This causes the current accumulations to use the present date as the start and accumulate to the next new end date which will be taken from the new calendar Once stored prior accumulations are always available and cannot be reset See Chapter 19 of Communicator User Manual for instructions on resetting TOU accumulations At the end of a defined period current accumulations are stored the registers are cleared and accumulations for the next period begin When the year boundary is crossed the second calendar if present is used To retain continuity you have up to one year to replace the old calendar with one for the following year EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 8 TIME OF USE FUNCTION 8 5 Daylight Savings and Demand To enable Daylight Savings Time for the meter from the Device Profile menu click General Settings Time Settings In the Time Settings screen click Auto DST which sets Daylight Savings Time automatically for the United States only You can also select User Defined and enter the desired dates for Daylight Savi
131. t if necessary 4 10 Isolating a CT Connection Reversal For a Wye System you may either e Check the current phase angle reading on the EPM 9900 meter s display see Chapter 6 If it is negative reverse the CTs e Goto the Phasors screen of the GE Communicator software see the GE Communicator User Manual for instructions Note the phase relationship between the current and voltage they should be in phase with each other For a Delta System Go to the Phasors screen of the GE Communicator software program see the GE Communicator User Manual for instructions The current should be 30 degrees off the phase to phase voltage EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 4 ELECTRICAL INSTALLATION 4 11 Instrument Power Connections The EPM 9900 meter requires a separate power source 1 Connect the line supply wire to L terminal 2 Connectthe neutral supply wire to the N terminal on the EPM 9900 meter 3 Connect the PE GND terminal to earth ground GE Digital Energy recommends that you fuse the power supply connection with a 5 Amp fuse 4 12 Wiring Diagrams Choose the diagram that best suits your application Diagrams appear on the following pages If the connection diagram you need is not shown contact GE Digital Energy for a custom connection diagram Service Figure No Method 9 Wye Delta O Direct 3 4 3 Element Connect 4W Wye Delta 3 3 4 3 Ele
132. t value for a given channel provides the initial value for that channel Subsequent writes will increment the residual for that channel by the difference of the old value and the new value The previous value is then replaced with the new value Attempting to write value greater than the programmed rollover value for a given channel is completely ignored and no registers are modified If the difference is greater than half of the programmed rollover value for a given channel the write does not increment the residual but does update the last value Overflow of the residual is not prevented EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 17 CHAPTER 11 USING THE I O OPTIONS 2 second process occurs in the main loop and attempts to decrement the residual by the programmed Energy Pulse value If the residual is greater than the programmed Energy Pulse value and the Pending Pulses value for that channel has not reached the maximum limit then residual is decremented appropriately and the Pending Pulses value is incremented by two signifying two more transitions and one more pulse 3 The third process runs from a timer that counts off pulse widths from the Programmable Minimum Pulse Width values If there are pulses pending for a channel and the delay has passed then the Pending Pulses value is decremented for that channel and the output relay is toggled Operation Indicator 0000H OK 1000H Problem Bit 1 1 EEPR
133. tage RMS voltage steady state Motor starting multiple second or longer Load variations duration Load dropping Voltage flicker RMS voltage steady state Intermittent loads repetitive condition Motor starting Arc furnaces Harmonic distortion Steady state current or Non linear loads voltage long term duration System resonance It is often assumed that power quality problems originate with the utility While it is true that may power quality problems can originate with the utility system many problems originate with customer equipment Customer caused problems may manifest themselves inside the customer location or they may be transported by the utility system to another adjacent customer Often equipment that is sensitive to power quality problems may in fact also be the cause of the problem If a power quality problem is suspected it is generally wise to consult a power quality professional for assistance in defining the cause and possible solutions to the problem EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 2 Overview and Specifications 21 EPM 9900 Meter Overview The EPM 9900 meter is the latest in a generation of meters that combine high end revenue metering with sophisticated power quality analysis In European Union member state countries this meter is NOT certified for revenue N C E metering See the Safety Precaution
134. tal VAR A B C Total VA A B C Total A B C Total Watt Hr A B C Tot Watt Hr A B C Tot Watt Hr Net VAR Hr A B C Tot VAR Hr A B C Tot VAR Hr Net VA Hr A B C Total Frequency X X X X X X X X X X X X X X X X X X X Voltage Angles Current Angles of Load Bar X X X X X X X X X X X X X X X X X X EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 9 2 4 3 Utility Peak Demand PL9900 CHAPTER 2 OVERVIEW AND SPECIFICATIONS The EPM 9900 meter provides user configured Block Fixed Window or Rolling Window Demand This feature allows you to set up a Customized Demand Profile Block Window Demand is demand used over a user configured demand period usually 5 15 or 30 minutes Rolling Window Demand is a fixed window demand that moves for a user specified subinterval period For example a 15 minute Demand using 3 subintervals and providing a new demand reading every 5 minutes based on the last 15 minutes Utility Demand Features can be used to calculate kW KVAR and PF readings All other parameters offer Max and Min capability over the user selectable averaging period Voltage provides an Instantaneous Max and Min reading which displays the highest surge and lowest sag seen by the meter 2 5 Order Codes Table 2 2 EPM 9900 Order Codes Base Unit Control Power Frequency
135. the unit s energy measurements are correct mH This product cannot be disposed of as unsorted municipal waste in the European Union For proper recycling return this product to your supplier or a designated collection point For more information go to www recyclethis info NOTICE Safety words and definitions The following symbols used in this document indicate the following conditions Indicates a hazardous situation which if not avoided will result in death or serious injury Indicates a hazardous situation which if not avoided could result in death or serious injury Indicates a hazardous situation which if not avoided could result in minor or moderate injury Indicates practices not related to personal injury GLOSSARY 0 2 Second Values These values are the RMS values of the indicated quantity as calculated after approximately 200 milliseconds 3 cycles of sampling 1 Second Values These values are the RMS values of the indicated quantity as calculated after one second 60 cycles of sampling Alarm An event or condition in a meter that can cause a trigger or call back to occur Annunciator A short label that identifies particular quantities or values displayed for example kWh Average Current When applied to current values Amps the average is a calculated value that corresponds to the thermal average over a specified time interval The interval is specified by the user in the meter
136. to power any external I O modules Figure 11 4 PSIO Side View Figure 11 5 PSIO Side and Top Labels On Power In N DANGER Bi Power Supply Max Power 12 VA Input Voltage 12 60 DC O 90 240V AC DC 0 Output Voltage 12V DC EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE I O OPTIONS 11 8 4 Using PSIO with Multiple I O Modules y PSIO must be to the right of the I O modules when viewing its side label as shown in the figure below NOTE Figure 11 6 PSIO with Multiple External I O Modules LEDs Communication ONLY A B and Shield On 8 Side Port 7 p TX ES o2 Control INPUT 1 INPUT 1 Power INPUT 2 INPUT 2 DANGER Power Supply INPUT 4 INPUT 4 INPUT 5 INPUT 5 Max Power 12 VA INPUT 6 INPUT 6 Input Voltage 12 60 DC O INPUT 7 INPUT 7 90 240V Ac Dc O INPUTS INPUTS Output Voltage 12V DC Reset Button Mounting Bracket Port Size and pin configuration vary Steps for Attaching Multiple I O Modules I O Module Dimensions Figure 11 7 1 0 Modules Top View 5 629 14 30cm 1 3017 3 305cm 1 125 2 858cm 090 229cm a Mounting Bracket Mounting Bracket 4 188 10 638cm EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 13 Mounting Bracket 1 1007 2 5
137. tor PF For Wye abc T For Delta x T PF Watt EQ 2 14 VA 2 6 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 2 4 1 Integrators CHAPTER 2 OVERVIEW AND SPECIFICATIONS Phase Angles Z cos i PF EQ 2 15 96 Total Harmonic Distortion 96 THD For Wye x Va V Ve 10 lp Ie For Delta x ia ipi lec Vab Vibe Ven 127 RMS THD EQ 2 16 TER EQ 2 16 K Factor A 127 y he RMS J h 1 KFactor EX MEME EQ 2 17 Y RMS hi1 Watt hour Wh number of samples N Wh 0 2 18 VAR hour VARh number of samples VAR VARRh gt EQ 2 19 Power utilities take into account both energy consumption and peak demand when billing customers Peak demand expressed in kilowatts kW is the highest level of demand recorded during a set period of time called the interval The EPM 9900 meter supports the following most popular conventions for averaging demand and peak demand Block Window Demand Rolling Window Demand Thermal Demand and Predictive Window Demand You can program and access all conventions concurrently with the GE Communicator software see the GE Communicator User Manual Block Fixed Window Demand This convention records the average arithmetic mean demand for consecutive time intervals usually 15 minutes Example A typical setting of 15 minutes produces an av
138. tor software to set the port s baud rate to 9600 and enable Modbus ASCII protocol See Chapter 19 of the GE Communicator User Manual for instructions Remember Modbus RTU will not function properly with Modem communication You must change the protocol to Modbus ASCII You must use an RS485 to RS232 converter and a Null modem GE Digital Energy recommends using its F485 converter that enables devices with different baud rates to communicate It also eliminates the need for a Null modem and automatically programs the modem to the proper configuration Also if the telephone lines are poor Modem Manager acts as a line buffer making the communication more reliable Figure 5 5 Remote Communication PC at office Originate Modem Telephone Line Remote Modem EPM 9900 Meter A Ci F485 converter 5 7 Programming Modems for Remote Communication You must program a modem before it can communicate properly with most RS485 or RS232 based devices This task is often quite complicated because modems can be unpredictable when communicating with remote devices If you are not using the GE Digital Energy Modem Manager device you must set the following strings to communicate with the remote EPM 9900 meter s Consult your modem s User manual for the proper string settings or see Section 5 8 for a list of selected modem strings Modem Connected to a Computer the Originate Modem e Restore modem to factory settings This erases all previo
139. ts 11 6 Relay Output Option Card R1 The Relay Output card has 6 relay contact outputs for load switching The outputs are electrically isolated from the main unit The technical specifications at 25 are as follows _ Nariberofoutputs 6 Mechanical life 5 x 10 switching operations Electrical life 10 switching operations at rated current Breakdown voltage AC 1000 V between open contacts Isolation AC 2500 V surge system to contacts Reset Power down No change last state is retained state EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE OPTIONS The general specifications are as follows Operating 20 to 70 C temperature Storage 30 to 80 C temperature Relative air humidity Maximum 9596 non condensing EMC Immunity EN61000 4 2 Interference Dimensions inches 0 75 x 4 02 x 4 98 WxHxL Card slot Option slots 3 and 4 External connection Wire range 16 to 26 AWG Strip length 0 250 Torque 2 2 Ib in 18 pin 3 5 mm pluggable terminal block 11 6 1 Relay Output Option Card R1 Wiring SLOT 3 4 RELAY OUTPUT RELAY CONTACTS NC EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 11 7 CHAPTER 11 USING THE I O OPTIONS 11 7 Digital Input Option Card D1 The Digital Input Option card offers 16 wet dry contact sensing digital inputs The technical specifications
140. typically limited to around 2 000 to 3 000 wire feet Communications speed is typically in the range of 120 bits per second to 115 000 bits per second Sag A voltage quality event during which the RMS voltage is lower than normal for a period of time typically from 1 2 cycle to 1 minute Secondary Rated Any Register or pulse output that does not use any CT or PT VT Ratio Serial Port The type of port used to directly interface with a device using the RS232 standard Swell A voltage quality event during which the RMS voltage is higher than normal for a period of time typically from 1 2 cycle to 1 minute TDD The Total Demand Distortion of the current waveform The ratio of the root sum square value of the harmonic current to the maximum demand load current See equation below NOTE The TDD displayed in the Harmonics screen is calculated by GE Communicator software using the Max Average Demand I 1 1 100 p THD Total Harmonic Distortion is the combined effect of all harmonics measured in a voltage or current The THD number is expressed as a percent of the fundamental For example a 3 THD indicates that the magnitude of all harmonic distortion measured equals 396 of the magnitude of the fundamental 60Hz quantity The THD displayed is calculated by your EPM 9900 meter Time Stamp A stored representation of the time of an event Time Stamp can include year month day hour min
141. ue Figure 1 8 shows another example of energy and demand In this case each bar represents the energy consumed in a 15 minute interval The energy use in each interval typically falls between 50 and 70 kWh However during two intervals the energy rises sharply and peaks at 100 kWh in interval number 7 This peak of usage will result in setting a high demand reading For each interval shown the demand value would be four times the indicated energy reading So interval 1 would have an associated demand of 240 kWh hr Interval 7 will have a demand value of 400 kWh hr In the data shown this is the peak demand value and would be the number that would set the demand charge on the utility bill Figure 1 8 Energy Use and Demand 100 80 willl 1 oc 3 dH D X gt Intervals 15 mins oO O kilowatt hours NO As be seen from this example it is important to recognize the relationships between power energy and demand in order to control loads effectively or to monitor use correctly EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 1 THREE PHASE POWER MEASUREMENT 13 Reactive Energy and Power Factor e The real power and energy measurements discussed in the previous section relate to the quantities that are most used in electrical systems But it is often not sufficient to only measure real power and energy Reactive power i
142. ues are entered calculate 1 Phase values by dividing 3 Phase values by three Convert 1 Phase Loss Watts to 1 Phase kW by dividing 1 Phase Loss Watts by 1000 3 Phase MVA 1 Phase MVA 1 Phase kVA Enter 3 Phase or 1 Phase values If 3 Phase values are entered calculate 1 Phase values by dividing 3 Phase values by three Convert 1 Phase Self Cooled MVA to 1 Phase kVA by multiplying by 1000 p _ EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 7 5 7 6 CHAPTER 7 TRANSFORMER LOSS COMPENSATION Phase to Phase Phase to Neutral Test Voltage Volts Test Voltage is generally Phase to Phase for three phase transformers Calculate Phase to Neutral Voltage by dividing Phase to Phase Voltage by the square root of 3 Calculate Full Load Current by dividing the 1 Phase kW Self Cooled Rating by the Phase to Neutral Voltage and multiplying by 1000 Meter Installation Data Instrument Transformers Numerator Denominator Multiplier Potential Transformers po o o Current Transformers Eq o ee Power Multiplier Multiplier x CT Multiplier Enter the Numerator and Denominator for each instrument transformer For example a PT with a ratio of 7200 120 has a numerator or 7200 a denominator or 120 and a multiplier of 60 7200 120 60 1 Meter Secondary Voltage Volts Meter Secondary Current Amps Base Conversion Factors Quantity Multiplier Trf IT Sec Meter Trf Cu
143. unt the attached group of modules on a secure flat surface This insures that all modules stay securely connected 11 8 5 Factory Settings and Reset Button 11 14 Factory Settings All external I O modules are shipped with a preset address and a baud rate of 57600 See following sections for I O Module addresses Reset Button If there is a communication problem or if you are unsure of a module s address and baud rate press and hold the Reset button for 3 seconds the module resets to a default address of 247 at 57600 baud rate for 30 seconds EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 11 USING THE OPTIONS 11 8 6 Analog Transducer Signal Output Modules Analog Transducer Signal Output Module Specifications Power Requirement 12 20 VDC 950 200 mA Operating Temperature 20 to 70 C 4 to 158 F Maximum Load Impedance Ox1mA 10k Ohms 4 to 20mA 500 Ohms Factory Settings Modbus Address 1mAONA 128 1 8 128 20mAONA4 132 20mAONS 132 Baud Rate 57600 Default Settings Reset Button Overview The Analog Transducer Signal Output modules 0 1 mA or 4 to 20 mA are available in either a 4 channel or 8 channel configuration Maximum registers per request read or write is 17 registers All outputs share a single common point This is also an isolated connection from ground Normal Mode Normal mode is the same for the 0 to 1 mA and the 4 to 20 mA Analog Output modules ex
144. usly programmed settings Set modem to display Result Codes The computer will use the result codes EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 5 5 5 6 CHAPTER 5 COMMUNICATION INSTALLATION Set modem to Verbal Result Codes The computer will use the verbal result codes Set modem to use DTR Signal This is necessary for the computer to insure connection with the originate modem Set modem to enable Flow Control This is necessary to communicate with remote modem connected to the EPM 9900 meter Instruct modem to write the new settings to activate profile This places these settings into nonvolatile memory the setting will take effect after the modem powers up Modem Connected to EPM 9900 Meter the Remote Modem 5 8 Restore modem to factory settings This erases all previously programmed settings Set modem to auto answer on n rings This sets the remote modem to answer the call after n rings Set modem to ignore DTR Signal This is necessary for the EPM 9900 meter to insure connection with originate modem Set modem to disable Flow Control The EPM 9900 meter s RS232 communication does not support this feature Instruct modem to write the new settings to activate profile This places these settings into nonvolatile memory the setting will take effect after the modem powers up When programming the remote modem with a terminal program make sure the baud rate of the terminal program matches
145. ute second and Daylight Savings Time indication TOU Time of Use Uncompensated Power VA Watt and VAR readings not adjusted by Transformer Loss Compensation V2T Threshold Data stops accumulating when voltage falls below programmed level Voltage Imbalance The ratio of the voltage on a phase to the average voltage on all phases Voltage Quality Event An instance of abnormal voltage on a phase The events the meter tracks include sags swells interruptions and imbalances VT Ratio The Voltage Transformer Ratio is used to scale the value of the voltage to the primary side of an instrument transformer Also referred to as PT Ratio Voltage Vab Vab Vbc Vca are all Phase to Phase voltage measurements These voltages are measured between the three phase voltage inputs to the meter Voltage Van Van Vbn Vcn are all Phase to Neutral voltages applied to the monitor These voltages are measured between the phase voltage inputs and Vn input to the meter Technologically these voltages can be measured even when the meter is in a Delta configuration and there is no connection to the Vn input However in this configuration these voltages have limited meaning and are typically not reported Voltage Vaux This is the fourth voltage input measured frombetween the Vaux and Vref inputs This input can be scaled to any value However the actual input voltage to the meter should be of the same magnitude as the voltage
146. will transmit the power to the load In a true delta service the phase to ground voltage will usually not be balanced because the ground is not at the center of the delta Fig 1 4 shows the phasor relationships between voltage and current on a three phase delta circuit 1 4 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE CHAPTER 1 THREE PHASE POWER MEASUREMENT In many delta services one corner of the delta is grounded This means the phase to ground voltage will be zero for one phase and will be full phase to phase voltage for the other two phases This is done for protective purposes Figure 1 4 Phasor diagram showing three phase voltages currents delta connected Vca Vbc Vab Another common delta connection is the four wire grounded delta used for lighting loads In this connection the center point of one winding is grounded On a 120 240 volt four wire grounded delta service the phase to ground voltage would be 120 volts on two phases and 208 volts on the third phase Figure 1 5 shows the phasor diagram for the voltages in a three phase four wire delta system Figure 1 5 Phasor diagram showing Three phase Four wire Delta Connected System Vca 120V 120V Vab EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 1 5 CHAPTER 1 THREE PHASE POWER MEASUREMENT 1 1 3 Blondell s Theorem and Three Phase Measurement In 1893 an engineer and mathematician named Andre E Blondell set forth the
147. wise degrade accuracy to 0 296 See hookup diagrams 8 9 and 10 in Chapter 4 EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE GE Energy EPM 9900 Electronic Meter Chapter 3 Mechanical Installation 3 1 Overview The EPM 9900 meter can be installed on any wall The various models use the same installation See Electrical Installation chapter for wiring diagrams Mount the meter in a dry location which is free from dirt and corrosive substances The figures shown in this chapter depict horizontal installation but you can also mount the meter vertically You can then rotate the display screens to support vertical installation NS see Chapter 6 for instructions 3 1 1 Mounting EPM 9900 Meter The EPM 9900 meter is designed to mount in a panel Refer to Section 3 2 for meter and panel cut out dimensions and Section 3 5 for mounting instructions To clean the unit wipe it with a clean dry cloth Maintain the following conditions e Operating Temperature 20 C to 70 4 0 F to 158 F e Storage Temperature 30 C to 80 C 22 F to 176 F e Relative Humidity 95 non condensing EPM 9900 MULTI FUNCTION POWER METERING SYSTEM USER GUIDE 3 1 CHAPTER 5 MECHANICAL INSTALLATION 3 1 2 Meter and Panel Cut out Dimensions Figure 3 1 Meter Dimensions Front Figure 3 2 Meter Back View 4 7 49 19 02cm 10 74 27 28cm

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