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SPM Synchronous Motor Protection and Control

1. DC FIELD AMPS RECOMMENDED NUMBER OF DCCT PRIM RANGE DCCT CABLE SIZE TURNS SETPOINT 1to3A 18 AWG 40 3 01 to8 A 16 AWG 20 10 8 01 to 15A 10 AWG 10 20A 15 01 to 24A 8 AWG 6 33A 24 01 to 34 A 6 ANG 4 50A 34 01 to 60A 4 AWG 2 100 60 01 to 75 A 2 AWG 2 100A 75 01 to 100A 2 AWG 1 200A 100 1 to 133A 1 0 AWG 1 200A 133 1 to 154 A 2 0 ANG 1 200A 5 6 SPM Synchronous Motor Protection and Control GE Multilin 5 SETPOINTS 5 2 SETPOINTS MENU 5 2 14 FIELD OVERTEMPERATURE HIGH FIELD OHMS PROTECTION HIGH FIELD OFF Collector Ring Range see below ENTER to modify Step see below HI EXC FLD OFF Brushless Range see below ENTER to modify Step see below FUNCTION The calculation of field exciter voltage divided by field exciter current yields field ohms Tripping action is ini tiated if the calculated resistance exceeds the HIGH FIELD HI EXC FLD setpoint indicating a field overtempera ture condition A separate accessory package PG2SPM or PG4SPM is required to utilize this feature Table 5 2 FIELD OVERTEMPERATURE RANGE STEP VALUES DC CT PRIM HIGH FIELD HIGH EXC FLD FIELD OHMS STEP SETPOINT MINIMUM MAXIMUM VALUE 5to 19A 100 4500 lt 10 0010 20 to 200A 10 400 lt 100 010 201 1000 0 20 5Q lt 450 Q0 10 MOTOR TYPE Collector Ring or Brushless APPLICATION This function emulates a resistance temperature detector RTD on the
2. FAD Run Time Allowable Zero Speed Stall Time N 1 0 10 20 30 40 50 60 70 80 90 100 Synchronous Speed 701761A7 CDR Figure 3 8 AMORTISSEUR WINDING PROTECTION GE Multilin SPM Synchronous Motor Protection and Control 3 7 3 2 COLLECTOR RING MOTORS 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 4 REDUCED VOLTAGE STARTING Many synchronous motor starting applications involve either reduced voltage starting reactor or autotrans former or part winding starting methods When these methods are used the available torque for acceleration is reduced from the torque that would result from a full voltage start Also the allowable stall time of a motor is extended during a reduced voltage start due to the reduced heating rate resulting from lower inrush currents The SPM has the ability to take advantage of the motor s extended stall time so that the motor and load can accelerate to synchronous speed in a time period longer than would be allowed with a full voltage start The acceleration torque is reduced as the square of the ratio of reduced voltage to full voltage and the motor heat ing rate is proportional to the square of the starting current Since the motor inrush current is reduced propor tionally with the voltage reduction due to the constant impedance of the synchronous motor at stall the following allowable stall time factor applies 2 where
3. AEL 10 8 10 9 EXCITER FIELD VOLTAGE METERING TEST 10 94 SETUP cn ni caet ttti ed cte mee e cys 10 9 2 RELAY PROGRAMMING 10 9 9 10 10 EXCITER FIELD CURRENT METERING TEST 10 10 17 SETUP rrt ti ite tee er n stet 10 10 2 RELAY PROGRAMMING TES Ta 3m odit e tera oderam e cernes A 1 COMMISSIONING AAA COLEECTOR RING SETTINGS ici etr AE A 1 1 22 BRUSHLESS SETTINGS eerte tret e einn drea A 2 B 1 WARRANTY AE dpge B 1 SPM Synchronous Motor Protection and Control GE Multilin 1 INTRODUCTION 1 1 OVERVIEW 1 1 1 GENERAL DESCRIPTION The SPM Synchronous Motor Protection and Control relay controls starting synchronizing and protection of collector ring and brushless type synchronous motors The SPM control functions for starting synchronous motors include accurate sensing of motor speed and rotor angle allowing the unit to apply excitation at optimum speed and angle This permits closer matching of the motor to the load Optimum application of excitation also reduces power system disturbance which occurs when the motor goes through a complete slip cycle with the field energized In addition the SPM can take advantage of the extended stall time of a reduced voltage start It also responds with the proper application of excitation in the event
4. 3 19 4 USER INTERFACE 4 1 1 GE Multilin 4 1 SPMPC SOFTWARE th anion ass 4 1 SPM Synchronous Motor Protection and Control i TABLE OF CONTENTS 41 2 2 86 0 4 2 4163 CONFIGURATION nter rr eterne recte tcr dece e t Rp pae ertet 4 3 41 4 CREATING A NEW SETPOINT FILE sese 4 4 4 1 5 EDITING A SETPOINT FILE 4 1 6 LOADING SETPOINTS 4 6 4 17 UPGRADING SETPOINT FILES TO A NEW 4 7 4 1 8 PRINTING SETPOINTS amp ACTUAL VALUES 4 459 TIRENDINQ nr tte epe epe ebd tea stas 4 2 KEYPAD INTERFACE 42 1 DESCRIPTION zie tte tice err n pe tre Ere 4 2 2 CHANGING SETPOINTS 4 23 CHANGING CALIBRATION 5 4 2 4 CHANGING 22 4 2 5 VIEWING amp CHANGING STATUS MODE PARAMETERS 4 26 ALTERNATE MENU 5 SETPOINTS 5 1 OVERVIEW 5 11 DESCRIPTION ett eite A avail oed 5 1 5 2 SETPOINTS MENU 5 24 POWERTFACTOR TRIP ioni rcr dene ba cea nre 5 2 2 POWER FACTOR DELAY ettet tnt dca eerte ena 5 2 3 POWER FACTOR SUPRESSION 524 POWER FACTOR MOBBE rtt
5. 6 2 FIELD OHMS MULTIPLIER osasse 5 7 BAUDJRATE RYE Y unease RE 5 12 FIELD OVERTEMPERATURE HIGH FIELD OHMS BRUSHLESS 3 17 PROTECTION 5 7 BRUSHLESS MOTOR annn 3 17 FIELD OVERTEMPERATURE RANGE STEP VALUES 5 7 FIELD OVERVOLTAGE TRIP COUNTER 6 3 5 8 C FIELD UNDERCURRENT DELAY 5 8 FIELD UNDERVOLTAGE 727 5 8 CALIBRATION ia he d 5 44 FIELD UNDERVOLTAGE 5 9 CHANGING CALIBRATION VALUES 4 12 FIRMWARE 4 42 2 7 15 CHANGING 4 13 FLOOR 5 11 CHANGING 5 2 2 4 4 4 4 11 FORMAT CODES 222 9 7 CHECK EXCITER TRIP COUNTER 6 3 FREQUENTLY ASKED QUESTIONS 7 13 COLLECTOR RING MOTOR 22 2 444 4 6 3 5 FULL SCALE EXCITER DC 5 14 COLLECTOR RING MOTOR FIELD APPLICATION TEST FULL SCALE EXCITER DC VOLTAGE 5 14 10 2 FULL SCALE MOTOR AC 9
6. 5 14 VVE e 555555950022 A 1 FUNCTIONAL OVERVIEW 1 1 CONFIGURATION 2 2 2 2 2 2 72 74 4 3 CONFIGURATOINS o r 5 12 CONTROL VOLTAGE 222 reen 27 CONTROLLER ACTION DURING PULL OUT 3 12 CREATING A NEW SETPOINT 4 4 MEBANE CALIBRATION MODULE 8 4 CURRENT TRANSFORMER 2 6 MEBANE CM PHYSICAL DIMENSIONS 8 5 GE MEBANE cccccccssesessesesecsteetecceceatseesecasseees 8 2 MEBANE DIMENSIONS enm 8 2 D GE MEBANE VOLTAGE DIVIDER NETWORK 8 2 GE MULTILIN CALIBRATION MODULE 8 3 DAMPER WINDINGS 2 0 0 00 0 7 7 00 3 1 GE MULTILIN CM PHYSICAL 8 8 4 DC CURRENT 22 1 1 2 8 6 GE MULTILIN MODULE 22222 8 3 DC FIELD CURRENT 2 6 GE MULTILIN 8 1 DCCT PHYSICAL DIMENSIONS ces 8 6 GE MULTILIN DIMENSIONS 8 1 DCCT SETUP ss 0000000 5 6 MULTILIN VOLTAGE DIVIDER NETWORK 8 1 DESCRIPTION 2 1 2 4 4 1 4 10 5 10 6 1 8 6 10 1 GENERAL 1 1
7. nennt is 2 6 RELUCTANCE 3 1 RELUCTANCE TORQUE SYNCHRONIZING 3 6 REMOVING THE DRAWOUT 2 2 REQUIRED SETPOINTS trn rr nennen nhu 5 2 RESYNCRONIZATION ATTEMPTS TRIP COUNTER 6 2 REVISION HIS TORY sire tpe eoo ot ntn rer ors ert orna 7 15 ROTOR angular displacement 3 3 RS485 COMMUNICATIONS 2 8 RS9485 WIRING 2 8 RITU ADDRESS oi erronee noob Hn ea rn cR 5 12 RUNTIME e ront A CE 5 5 S SALIENT POLE SYNCHRONOUS MOTOR 3 1 SETPOINT atona a Eie aian A 1 SETPOINT E 9 1 SINGLE LINE 1 2 SOFTWARE INSTA AON ss E 4 2 SPECIFICATIONS rnt ern Enni ain ex a 1 4 iulio 7 13 SPMIMESSAGES eio 7 3 SPM MOUNTING ACCESSORIES 2 2 SPM SPECIFICATIONS 1 4 SPM TEST CHECKS aandie 7 1 SPM TROUBLESHOOTING Sheet 1 of 2 7 6 SPMPG SOFTWARE recorrer tir tenenda 4 1 SQUIRREL CAGE TRIP COUNTER 6 3 STABILITY GT 5 10 STALL PROTECTION net tn nn hn 3 19
8. SPM Synchronous Motor Protection and Control iii TABLE OF CONTENTS 10 FUNCTIONAL TESTS A COMMISSIONING B WARRANTY iv 10 1 INTRODUCTION 10 1 7 DESCRIPTION iE 10 1 10 2 COLLECTOR RING MOTOR FIELD APPLICATION TEST 10 21 SETUP eter e ee dne i ee eie tre epe 10 2 10 2 2 RELAY 10 2 10 23 ES T 10 2 10 3 COLLECTOR RING MOTOR POWER FACTOR TEST 10 31 SETUP odit etnia brem 10 3 2 RELAY PROGRAMMING LUKE 10 4 COLLECTOR RING MOTOR POWER FACTOR TRIP TEST 10421 SETUP 10 4 2 RELAY PROGRAMMING 10 4 3 TEST eerte idee aee va ete 10 5 BRUSHLESS MOTOR FIELD APPLICATION TEST JR XE 10 5 10 5 2 RELAY PROGRAMMING isssseenee ee ene nen nen emen enne nnns 10 5 JM IR 10 5 10 6 BRUSHLESS MOTOR POWER FACTOR TEST 10 61 SETUP iiu i attire ne dict ea oy 10 6 2 RELAY PROGRAMMING nu cgcq 10 7 BRUSHLESS MOTOR POWER FACTOR TRIP TEST USE Pcr 10 7 2 RELAY PROGRAMMING CMT 10 8 AC CURRENT METERING AND PULL OUT TEST 10 81 SETUP TEES 10 8 10 8 2 RELAY 10 8 10 8 9 DATAE
9. 3 15 3 11 POLE 3 10 3 19 ROQUIAT ON 3 16 3 19 POWER FACTOR DELAY 5 2 POWER FACTOR 5 3 POWER FACTOR 2 6 POWER FACTOR 5 12 POWER FACTOR REGULATION OUTPUT 2 7 POWER FACTOR 5 10 POWER FACTOR 5 2 POWER FACTOR TRIP 5 2 POWER FACTOR TRIP COUNTER 6 3 PRINTING SETPOINTS amp ACTUAL VALUES 4 8 PROGRAMMING rne haere ihnen neat pen 7 8 PROGRAMMING 7 8 PROGRAMMING EXAMPLE Sheet 1 of 4 7 8 PULL OUT TRIP 0 6 2 ii SPM Synchronous Motor Protection and Control R REDUCED VOLTAGE STARTING 3 8 REFERENCE VOLTAGE INPUT CONNECTIONS 2 7 REGULATOR atento Ua Lotta sta 5 10 REGULATOR OUTPUT LIMIT 5 11 REGULATOR 0 7 5 RELAY OUTPUTS ete treo
10. 7 6 1 DOs 1 Always connect the MX input up to an auxiliary b contact from the motor contactor It is this contact that indicates to the SPM that the motor has been started or stopped Protection and synchro nization routines will not run properly if this input is not connected 2 Ensure that all ground connections are made to the ground bus Grounding to doors or other painted surfaces may cause the noise immunity of the SPM to be reduced 7 6 2 DON Ts 1 Don t use the VDN module that was supplied with the old version MSPM C0192 with the SPM The VDN module has changed and is incompatible Damage or miss operation will occur if used 2 Don t use a 1A secondary CT with the SPM The SPM has been designed to work with 5A CTs only 3 Don t mount the SPM display remotely The display must be mounted to the case when in operation Noise problems may result if it is wired remotely 4 Do not enable the FIELD VOLTS setpoint if the exciter is not powered up prior to starting the motor Field volts are monitored prior to starting and while the motor is running A missing voltage start block will be is sued if the SPM detects field volts less than the setpoint level while the motor is stopped and prevent starting of the motor 7 12 SPM Synchronous Motor Protection and Control GE Multilin 7 TESTING AND TROUBLESHOOTING 7 7 FREQUENTLY ASKED QUESTIONS 7 7 1 SPM FAQ 1 Is the SPM a drop in replacement for the uSPM Func
11. Range for brushless motors 1 The access password must be written correctly before any setpoints can be written via Modbus The password is initially the same as the default password but the two passwords are stored separately so the keyboard can not be used to change the communications password and vice versa 2 The allowable range of FLA is as follows the minimum full load amps value is 2 5 times the CT ratio the maximum is equal to the CT ratio 3 The locked rotor current is range dependent on the FLA setpoint the minimum is twice the full load amps and the maximum value is 12 times the FLA 4 REGULATOR OUTPUT must be greater than or equal to FLOOR VOLTS likewise FLOOR VOLTS must be less than or equal to REGULATOR OUTPUT GE Multilin SPM Synchronous Motor Protection and Control 9 2 MEMORY MAPPING 9 MODBUS COMMUNICATIONS Table 9 2 MODBUS MEMORY MAP Sheet 3 of 5 GROUP ADDR DESCRIPTION FORMAT FACTORY hex CODE DEFAULT DIGITAL 024C MX Status Switchstate N A INPUTS 024D NX Status Switchstate 024 Reserved 0254 Reserved STATISTICS 0255 Motor Running Hours can be written 0256 as holding registers 0257 Field Loss Trip Counter 0258 Pull Out Trip Counter 0259 Resynchronization Trip Counter 025A Missing External PF Voltage Reference 025B Check Exciter Trip Counter Incomplete Sequence Trip Counter 025C Power Factor Trip Co
12. 2 1 1 DESCRIPTION The SPM can be incorporated in synchronous motor control equipment as a complete controller including an AC power switching device for the motor starter or as a field panel AC power switching supplied by other device 2 1 2 ELEMENTS OF A SYNCHRONOUS MOTOR CONTROLLER A complete synchronous motor controller has the ability to switch the motor on to and off of the power system and protect the motor from damage that can occur if the motor is running in an abnormal condition such as out of synchronization A complete synchronous motor controller consists of a motor starter and switching device typically a contac tor which controls the main power to the motor In addition protective relaying is provided for both the stator and the rotor such as a 469 SPM combination Controls for starting and stopping the motor start stop push buttons are also included Indicating and metering devices such as line ammeters are supplied if not included in the relays All of these features are common with motor controllers of all types Figure 2 1 EXPLODED VIEW OF THE SPM GE Multilin SPM Synchronous Motor Protection and Control 2 1 2 2 MECHANICAL INSTALLATION 2 INSTALLATION 2 2 1 UNPACKING THE SPM When the SPM is shipped separately carefully unpack the module and report any observable damage or miss ing components to the carrier and to GE Multilin All included parts are shown in Figure 2 1 EXPLODED VIEW OF THE S
13. e Printing Setpoints and Actual Values Using Trending The following minimum requirements must be met for the software to operate properly e Processor minimum 486 Pentium recommended Memory minimum 4 MB 16 MB minimum recommended 540 K of conventional memory Hard Drive 20 MB free space required before installation of PC program O S minimum Windows 3 1 Windows NT or Windows 95 98 2000 recommended Windows 3 1 Users must ensure that SHARE EXE is installed If a version of the SPMPC software is currently installed note the path and directory name as this information will be needed when upgrading GE Multilin SPM Synchronous Motor Protection and Control 4 1 4 1 SPMPC SOFTWARE 4 USER INTERFACE 4 1 2 SPMPC INSTALLATION Installation of the SPMPC software is accomplished as follows 1 Ensure that Windows is running on the local PC 2 Insert the GE Multilin Products CD into your CD ROM drive or point your web browser to the GE Multilin website at www GEindustrial com pm With Windows 95 98 the Product CD will launch the welcome screen automatically Since the Products CD is essentially a snapshot of the GE Multilin website the pro cedures for installation from the CD and the web are identical Power Management Microsoft Internet Explorer File Edit View Go Favorites Help 2 QiadjamgSelmmus Address Je D HOMEPAGE INDEX HTM GE Industrial Systems GEHome GElndustrial Ho
14. 5 2 SPM Synchronous Motor Protection and Control GE Multilin 5 SETPOINTS 5 2 SETPOINTS MENU 5 2 4 POWER FACTOR MODE PF MODE ridethru Range ridethru ENTER to modify FUNCTION Ridethru Mode This mode allows the motor to ride through power factor dips of less duration than the PF DELAY but will protect against cyclical power factor dips Brushless motors are automatically in ridethru mode Resync Mode Upon measuring a power factor below the PF TRIP setpoint the unit de energizes the FAR and FCX relays and attempts to resynchronize the motor The motor continues to run with the field removed for the programmed PF DELAY and if resynchronization does not occur within this time a PWR FACTOR TRIP occurs operating the trip relay and stopping the motor MOTOR TYPE Collector Ring 5 2 5 FIELD APPLICATION RELAY DELAY FAR DELAY 05 Range 0 to 90 seconds ENTER to modify Step 1 FUNCTION This setpoint provides for a time delay in closing the field application relay FAR to apply DC to the exciter after the stator windings are energized MOTOR TYPE Brushless 5 2 6 FIELD CONTACTOR AUXILIARY RELAY DELAY FCX DELAY 1s Range 1 to 6 seconds for Collector Ring ENTER to modify 1 to 90 seconds for Brushless Step 1 FUNCTION Program FCX DELAY time to enable power factor protection field overtemperature protection field loss protec tion and auto loading FCX relay operation Timing begins with FAR relay operation
15. 5 4 6 PARITY 5 12 SAT TURNAROUND ena itera ise tied 5 13 548 STATUS MODE ertt rtr ben retro i qe lad NER nian 5 13 54 9 1 PASSWORD teu cried rp tel ene de roe aa tue 5 13 5 5 CALIBRATION MENU 5 5 1 FULL SCALE EXCITER DC VOLTAGE 5 5 2 FULL SCALE EXCITER DC AMPS S 5 5 3 FULL SCALE MOTOR AC AMPS 22 ee ee nee een nennen 5 14 ii SPM Synchronous Motor Protection and Control Multilin TABLE OF CONTENTS 6 ACTUAL VALUES 7 TESTING AND TROUBLESHOOTING 8 ACCESSORIES 9 MODBUS COMMUNICATIONS GE Multilin 6 1 DISPLAY SCROLLING 6 1 DESCRIPTION tette a ee dtu n 6 1 6 2 STATUS 6 21 MOTOR RUNNING 6 2 6 2 2 INCOMPLETE SEQUENCE TRIP 0 6 2 6 2 3 FIELD LOSS TRIP COUNTER 6 2 6 24 PULL OUT TRIP COUNTER 6 2 6 2 5 RESYNCRONIZATION ATTEMPTS TRIP COUNTER 6 2 6 2 6 MISSING EXTERNAL PF VOLTAGE REFERENCE COUNTER 26 2 6 2 7 CHECK EXCITER TRIP 6 2 8 POWER FACTOR TRIP 6 2 9 SQUIRREL CAGE TRIP COUNTER 6 2 10 FIELD OVERVOLTAGE TRIP COUNTER 7 1 START UP PROCEDURE PAA 4 0 bee ten d tere c ec edet ea c pe
16. DIRECT CURRENT CT PRIMARY RATING 5 6 GROUNDING 2 2 00000000 2 6 DISPLAY 7 3 DISPLAY AND 7 8 DISPLAY SCROLLING o ar 6 1 l DONT ewe e a A 7 12 DOSC uM me E A M 7 12 IMPLEMENTATION 9 1 DOs AND 5 7 12 INCOMPLETE SEQUENCE DELAY 5 9 DOWNLOADING SETPOINT FILES 4 6 INCOMPLETE SEQUENCE TRIP COUNTER 6 2 INSERTING THE DRAWOUT 2 2 5 nnne 7 1 INSTALLATION T 4 2 EDITING A SETPOINT 4 5 INSTRUCTIONS 2 2 44 4 01 1 4 7 5 ELECTRICAL 2 4 10 1 ELEMENTS A SYNCHRONOUS MOTOR CONTROLLER 2 1 EXCITER VOLTAGE OUTPUT MONITOR 26 EXECUTE OPERATION COMMAND CODES COIL NUMBERS eee ene tete 9 1 KEYPAD INTERFACE seen 4 10 EXPLODED VIEW OF THE 2 1 GE Multilin SPM Synchronous Motor Protection and Control i L LINE FREQUENCY ane
17. STALL TME rtr reno nhan eterne ep turbam prr Rn 5 5 STANDBY MODE te eng are 7 1 STARTING AND 21 3 5 STARTING 3 7 STARTING THE BRUSHLESS 3 18 STARTING TORQUE saiia iernii deiae aa anne 3 1 START UP 7 2 START UP PROCEDURE cancao ainda ki 7 1 SI ATUS eE apte ESE EEA Ek eda mus 6 2 STATUS MODE set e En nnm nk 5 13 SYNCHRONOUS 5 5 SYNCHRONOUS TORQUE 3 1 T 7 1 TORQUE Sta MNJ a ES 3 1 ine e 3 1 TORQUE VS SPEED Pep rex inde 3 3 audacem O ms 4 9 GE Multilin 7 6 TROUBLESHOOTING 2 7 6 TURNAROUND tote reete ha tied ene ho 5 13 TYPICAL ROTOR FLUX AND CURRENT AT PULL IN 3 2 TYPICAL TRANSFORMER ACTION OF ROTOR FLUX AND CURENT CONSTANT SLIP 3 2 TYPICAL WIRING 0 2 4 U UNPACKING THE 00 1 2 2 GE VIEWING amp CHAN
18. 3 SYNCHRONOUS MOTOR DESCRIPTION cene ern cte PITE e dA Dess 2 4 GROUNDING a FIELD AND EXCITER VOLTAGE INPUTS sesenta 2 6 RELAY OUTPUTS 2 6 CURRENT TRANSFORMER INPUT 2 6 POWER FACTOR OUTPUT 2 6 DC FIELD CURRENT INPUT 2 6 EXCITER VOLTAGE OUTPUT MONITOR 2 6 POWER FACTOR REGULATION OUTPUT 22 7 CONTROL 2 7 EXTERNAL VOLTAGE PF REFERENCE 2 7 RS485 COMMUNICATIONS 2000 2 8 3 1 OVERVIEW APPLICATIONS 3 1 3 2 COLLECTOR RING MOTORS 3 2 1 STARTING AND SYNCHRONIZING tts 3 5 3 22 RELUCTANCE TORQUE SYNCHRONIZING 226 3 23 STARTING 23 7 324 REDUCED VOLTAGE 3 8 3 2 5 POWER FACTOR PULL OUT PROTECTION s 3 10 326 POWER FACTOR OPERATION nnne 3 2 7 CONTROLLER ACTION DURING PULL OUT 328 EFFECT OF VOLTAGE DIPS ON MOTOR POWER 3 13 3 2 9 POWER FACTOR DETECTION amp INDICATION OVERHAULING LOAD 3 15 3 2 10 POWER FACTOR REGULATION 3 16 3 3 BRUSHLESS CONTROLLER 3 31 DESCRIPTION ttt 332 BRUSHLESS MOTOR REVIEW 33 3 STARTING THE BRUSHLESS MOTOR 334 STALL PROTECTION ttt 3 3 5 POWER FACTOR PROTECTION 3 19 3 3 6 POWER FACTOR REGULATION
19. Pressing the GE key gain will then return the display to the SPM READY display 4 2 6 ALTERNATE MENU OPERATION In order to view setpoints without changing values or to view setpoints if the password is unknown the alter nate menu can be used When the SPM is in the ready mode Collr Ring Motor SPM READY press the Enter key and the SPM will automatically switch into the alternate menu The SPM will begin to auto matically scroll through the setpoints Pressing either of the z zx keys once will halt the display Pressing either of the z z keys repeatedly will allow the user to scroll through the setpoints manually This allows the user to scroll through the setpoints using the z zx keys but does not allow setpoints to be changed To return to the SPM READY display press the Enter key 4 14 SPM Synchronous Motor Protection and Control GE Multilin 5 SETPOINTS 510 VERVIEW PROGRAMMING MODE 5 PASSWORD __ ENTER VERIFY ENTER T PROGRAMMING MODE GE SCROLL PASSWORDS 5 5 5 CONFIGURATIONS lt gt CALIBRATION lt gt SETPOINTS 4 ULATOR TUNI ENTER FOR MENU ENTER FOR MENU ENTER FOR MENU ITER FOR MEN E E 1 MOTOR BRUSHLESS FS EXC VOLT 100 PF TRIP 0 60 fs s s LINE FREQ 60 Hz FS EXC AMPS 1 00 PF DELAY 5 0s s 4s s 1 PF REF INTERNAL FS MTR AMPS 1 00 PF
20. Right Em 4 Selectthe File Print menu item and click OK to send the setpoint file to the connected printer 4 8 SPM Synchronous Motor Protection and Control GE Multilin 4 USER INTERFACE 4 1 SPMPC SOFTWARE 4 1 9 TRENDING Trending from the SPM can be accomplished with the SPMPC software Many different parameters can be trended and graphed at sampling periods ranging from 1 second up to 1 hour The parameters which can be Trended by the SPMPC program are Filter Line Current Filter Exciter Current Filter Line Voltage Filter Exciter Voltage Filter Power Factor Filter Field Ohms Filter Phase Angle Demo Trending 1 To use the Trending function run SPMPC and establish communications with a connected SPM relay 2 Select the Actual Values gt Trending menu item open the Trending window Mode Select Level Waveform Click on these buttons to view Displays the value of the Graph The trended data Cursor Line 1 Cursor Line 2 or Delta difference Ot the active Cursor Line from the SPM values for the graph Actual Values Trending x CURSOR 1 CURSOR 2 DELTA CURSOR 1 at 5s LEGEND X Demo Trending 1 01 Units Filter Line Current _ Filter Line Voltage _ Filter Power Factor 4 Filter Phase Angle Filter Exciter Current Filter Field Ohms Check Box Buttons Cursor Lines Toggle the Check Box to Print Setup to edit Graph Attribute Move Lin
21. This can be accom plished with the motor either off or in running mode Use the following procedure to enter the STAT MODE 1 With the display indicating the following press the GE key items in bold italics indicate that they should be blinking on the screen Collr Ring Motor SPM READY 2 The display should now indicate that the unit is in STAT MODE STAT MODE SCROLL for menus Use the keys to scroll through the STAT MODE parameters If the SPM is configured such that status mode parameters are read only then these values can only be viewed and cannot be changed If the SPM is configured such that status mode parameters are read write then these values can be changed as follows 5 Once the parameter that is to be changed is displayed on the display press ENTER to select the parameter MOTOR HRS 0 SELECT to modify 6 Use the A Z keys to change the values of the selected parameter and then press the Enter key to con tinue If you choose not to change the parameter once it has been selected pressing the GE key deselects the parameter MOTOR HRS 0 SCROLL to change 7 Additional parameters can be changed using the above procedure When all parameter changes have been accomplished press the GE Key This will return the display to the STAT MODE main menu Press the GE key again and the display will change to the PROGRAMMING MODE main menu Pressing the GE key again puts the display into the TEST MODE main menu
22. W TOP SID Figure 8 4 GE MEBANE VDN DIMENSIONS GE Multilin SPM Synchronous Motor Protection and Control 8 ACCESSORIES 8 2 FIELD CURRENT CALIBRATION MODULE 8 2 1 GE MULTILIN MODULE The Calibration Module CM provides the proper AC excitation voltage to the DCCT and provides a calibration adjustment to obtain a proper field amperes reading This calibration is performed with a potentiometer The Calibration Module is required to utilize field current and or field overtemperature features It is included in the optional PG2SPM or PG4SPM accessory packages Figure 8 5 GE MULTILIN CALIBRATION MODULE The Calibration Module for DCCT5 GE part 1 740 0008 shall not be used with DCCT2 NOTE The Calibration Module for DCCT2 part 1740 0005 if used with DCCT5 for DC currents higher than 200A may not perform as expected and can damage the calibration module WARNING GE Multilin SPM Synchronous Motor Protection and Control 8 3 8 2 FIELD CURRENT CALIBRATION MODULE 8 ACCESSORIES TOP VIEW SIDE VIEW 6 60 22 168 70 i ay e C 004 SY S
23. a SQUIRREL CAGE TRIP is received FIRMWARE REVISION 210 000 Field Amps Loss delay added Field Volts Loss delay added GE Multilin SPM Synchronous Motor Protection and Control 7 15 7 8 REVISION HISTORY 7 TESTING AND TROUBLESHOOTING 7 16 SPM Synchronous Motor Protection and Control GE Multilin 8 1 VOLTAGE DIVIDER NETWORK 8 ACCESSORIES 8 1 1 GE MULTILIN VDN The VDN is provided to connect the SPM to field and or exciter voltages The VDN is included as a standard accessory Figure 8 1 GE MULTILIN VOLTAGE DIVIDER NETWORK VDN BOARD TOP VIEW VDN BOARD SIDE VIEW 1 45 5 250 133 37 1 78 121 O0 222 i c3 E MULTILIN VDN 1240 0006 Inches mm VDN BOARD PANEL DRILLING 4 78 121 0 200 DIA 5 08mm 2 PLACES Figure 8 2 GE MULTILIN VDN DIMENSIONS GE Multilin SPM Synchronous Motor Protection and Control 8 ACCESSORIES 8 1 VOLTAGE DIVIDER NETWORK 8 1 2 GE MEBANE VDN Figure 8 3 GE MEBANE VOLTAGE DIVIDER NETWORK 0 156 DIA 2 PLACES 8 8 NINE NES SS DO d SO 560 122 VQ 100 SO 100 SS 120 Fol cm 6 4 1 E 8 050 701403A2 DWG
24. p programmed full voltage locked rotor current lt Measured inrush current This ratio can be used as a factor for increasing the stall time above the full voltage allowable stall time for any given speed See Figure 19 The SPM calculates the ratio squares it and factors this value into the stall time algorithm approximately one tenth of a second after motor starts When the final step contactor closes and applies full voltage to the motor windings a N O interlock from this contactor is wired to the SPM to signal that the motor is now at full voltage The correction factor for reduced voltage starts then immediately becomes unity If for any reason it is not desirable to have this ratio correction factored in a jumper may be placed across inputs NX1 and NX2 Conversely if the motor is started from a weak system and significant voltage dips are expected during starting the factory jumper from NX1 to NX2 may be removed The SPM will automatically extend the stall and accelerating time per the reduced voltage factor To find the protective characteristic used plot the programmed value for 50 run time and draw in the complete curve through the plotted point using the above curves as a guide ee The curves shown in the following diagram demonstrate how the trip characteristic of the amortisseur winding protection is adjusted for reduced voltage starts For this example curve 1 is taken from one of the family of curves in F
25. password other then the factory default to restrict access to programma ble feature on the SPM GE Multilin SPM Synchronous Motor Protection and Control 5 13 5 5 CALIBRATION MENU 5 SETPOINTS 5 5 1 FULL SCALE EXCITER DC VOLTAGE FS EXC VOLT Range 0 60 to 1 50 V ENTER to modify Step 0 01 FUNCTION Use this setpoint to fine tune the metered DC exciter voltage input to the SPM from the VDN To calibrate the exciter voltage compare the reading on the SPM with the measured value of an external meter and adjust this setpoint as necessary Note that this must be done while the motor is running thus it is advisable that the EX FLD VOLTS setting be turned OFF until calibration is complete 5 5 2 FULL SCALE EXCITER DC AMPS FS EXC AMPS Range 0 60 to 1 50 ENTER to modify Step 0 01 FUNCTION Use this setpoint to fine tune the metered DC exciter current input to the SPM from the calibration module and DCCT Coarse adjustment should be made via the calibration module potentiometer To calibrate the exciter amps compare the reading on the SPM with the measured value of an external meter and adjust this setpoint as necessary Note that this must be done while the motor is running thus it is advisable that the EX FLD AMPS setting be turned OFF until calibration is complete 5 5 3 FULL SCALE MOTOR AC AMPS FS MTR AMPS Range 0 60 to 1 50 A ENTER to modify Step 0 01 FUNCTION Use this setpoint to fine tune the metered AC motor curre
26. terminals TRP1 TRP2 to close and the SPM to display SPM READY Refer to Figure 2 4 PANEL AND TERMINAL LAYOUT on page 2 5 for trip relay contact locations and Figure 2 3 TYPICAL WIRING DIAGRAM on page 2 4 for wiring details Pressing the START button picks up relay MX which in turn energizes the coil of main contactor M When M closes and applies AC power to the motor induced field current flows through the field discharge resistor and an associated voltage drop appears across terminals and Ve The frequency of this induced field voltage decreases as the motor speed increases and the speed sensing circuits of the SPM cause the FAR relay to close as the motor reaches the programmed slip value When the FAR relay contacts terminals FAR1 FAR2 close the field contactor FC closes and applies excitation to the motor from the exciter After the programmed FCX DELAY the FCX relay picks up and closes its contacts allowing the customer s auto matic loading circuits to be activated 7 2 SPM Synchronous Motor Protection and Control GE Multilin 7 TESTING AND TROUBLESHOOTING 7 2 DISPLAY AND MESSAGES 7 2 1 DISPLAY The SPM uses the alphanumeric display to indicate the following information programming prompts SPM trip explanations readout of the desired motor running parameters The motor running parameters are displayed as follows Before start the SPM displays SPM READY While starting the power factor and lin
27. the 3 phase tester to SPM terminals B9 and B10 control power and PF voltage reference respectively Program for 120 V AC To test the OPTIONAL PF REFERENCE input connect Va and Vb to terminals A4 and A5 and 120 V AC to B9 and B10 2 Connect Ic of the 3 phase tester terminals B3 and B4 Polarity is critical Note la and Ib outputs of 3q tester may have to be shorted if they cannot be turned off Program for 4A 3 Connect the function generator s output AC sinewave 5 to 10 V to the VF terminals A18 and A19 Set to 3 Hz 4 Connect the Switch to terminals A11 and A12 of the SPM MX input Close switch Connect multimeter to TRIP relay outputs to monitor relay status 10 3 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 except for following exceptions e MOTOR Collector Ring e REF External if testing the external PF volt age reference b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 3 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close 2 Turn on current source and function generator Open MX switch 4 FAR contact should close followed by FCX contact FIELD IS APPLIED message should momentarily flash on screen PF metered value will now be displayed along with other metered values Vary voltage angle as in table below and ch
28. the existing value of LR AMPS to 226 SCROLL Key s to select value of 226 and then SELECT ENTER key to accept new value SYNC SLIP 0 5 ENTER to modify SCROLL DOWN key to the SYNC SLIP set point and then SELECT ENTER key to select the setpoint GE Multilin SYNC SLIP 4 0 SCROLL to change Change the existing value of SYNC SLIP to 4 0 SCROLL Key s to select value of 4 and then SELECT ENTER key to accept new value SPM Synchronous Motor Protection and Control 7 9 7 5 PROGRAMMING 7 TESTING AND TROUBLESHOOTING Table 7 2 PROGRAMMING EXAMPLE Sheet 3 of 4 KEYPRESS DISPLAY STALL TIME 40s ENTER to modify COMMENTS SCROLL DOWN key to move to the STALL TIME setpoint then SELECT ENTER to select the setpoint STALL TIME 7s SCROLL to change Change the existing value of STALL TIME to 7 seconds SCROLL 5 to select value of 7s and then SELECT ENTER key to accept new value RUNTIME 3 00 x ST ENTER to modify SCROLL DOWN key to move to the RUNTIME setpoint then SELECT ENTER to select the setpoint RUNTIME 1 46 x ST SCROLL to change Change the existing value of RUNTIME to 1 46 times the stall time SCROLL Key s to select value of 1 46 and then SELECT ENTER key to accept new value DCCTPRIM 20A ENTER to modify SCROLL DOWN key to move to the DC CT PRIM setpoint then SELECT ENTER to select the setpoint DC CT PRIM 100A SCROLL to change Change the existing value of D
29. the following Applying power to the stator at full voltage or reduced voltage e Shunting the field with a discharge resistor FDRS e Sensing rotor speed e Sensing rotor angle Applying excitation at optimum speed and angle e Reluctance torque synchronizing The first step in starting a synchronous motor is to apply power to the stator by means of a magnetic contactor or circuit breaker Shunting a resistor around the motor field during starting is accomplished with a field contactor Optimum appli cation of excitation that is closing the field contactor requires accurate sensing of motor speed and rotor angle This SPM provides this function Optimum speed for pull in varies with motor design and with the field discharge resistor value Adjustment of the control to apply field at various values of motor speed is important The correct rotor angle for field application does not vary and is always the point where induced field current passes through zero going from negative to positive the point of maximum rotor flux see Figure 3 3 TYPI CAL ROTOR FLUX AND CURRENT AT PULL IN on page 3 2 Maximum utilization of motor pull in capability depends upon the degree to which the control can accurately sense speed and rotor angle Rotor frequency is the most positive electrical parameter available for indicating speed and can be sensed by detecting the frequency of the voltage across FDRS Voltage across FDRS is not actually induce
30. to dampen power angle oscillations after the motor has synchronized Unlike induction motors no continuous squirrel cage torque is developed at normal running speeds Examine the figure below Squirrel cage bars Stator Stator core Field Winding Slip Rings Slots V 4 for AC winding Rotor To DC suppl i y L y Figure 3 1 SALIENT POLE SYNCHRONOUS MOTOR When the motor accelerates to near synchronizing speed about 95 synchronous speed DC current is intro duced into the rotor field windings This current creates constant polarity poles in the rotor causing the motor to operate at synchronous speed as the rotor poles lock onto the rotating AC stator poles Torque at synchronous speed is derived from the magnetic field produced by the DC field coils on the rotor link ing the rotating field produced by the AC currents in the armature windings on the stator Magnetic polarization of the rotor iron is due to the rotor s physical shape and arrangement and the constant potential DC in coils looped around the circumference of the rotor Synchronous motors possess two general categories of torque characteristics One characteristic is deter mined by the squirrel cage design which produces a torque in relation to slip some speed other than syn chronous speed The other characteristic is determined by the flux in the salient field poles on the rotor as it runs at synchronous
31. 10ns Ontario Hydro A 28M 82 IEC255 4 Impulse High Frequency Distur bance Class III Level IEC 255 5 0 5J 5kV C37 90 2 Electromagnetic Interference at 150 MHz and 450 MHz 10V m IEC801 2 Static Discharge Sinusoidal Vibration 8 0g for 72 hrs With the use of an isolation transformer Please contact GE Multilin technical support for recommended products CERTIFICATION UL PHYSICAL Shipping Box Ship Weight UL listed for the USA and Canada 12 50 x 10 50 x 9 75 L x H x D 318 mm x 267 mm x 248 mm L x H x D 14 25 Ib 6 45 kg It is recommended that the SPM be powered up at least once per year to prevent deterioration Specifications are subject to change without notice CT Primary 5101000 Conversion range 0 05 to 1 x CT Accuracy 2 EXCITER VOLTAGE INPUTS Conversion 0 to 350 V DC prior to VDN Accuracy 1 POWER FACTOR Range 0 01 to 1 to 0 01 Time Delay 0 1 to 10 seconds Accuracy 5 SWITCH INPUTS MX AND NX Type Dry contact Internal interrogation voltage 85 to 265 V AC control voltage PF ANALOG OUTPUT Type Active Output 0 to 10 V DC max at RL gt 1 KW min load Accuracy 10 0 1 V Isolation 36 V pk CONTROL VOLTAGE Input 85 to 265 V AC at 48 to 60 Hz Power 10 VA nominal Holdup 100 ms typical at 120 V AC RELAY CONTACT 17 of electrolytic capacitors the power supply NOTE 1 4 SPM Synchronous Motor Protection and Control GE Multilin 2 INSTALLATION 2 1 OVERVIEW
32. 2 Connect the Switch to terminals A11 and A12 of the SPM MX input Close switch Connect the function generator s output AC sinewave 5 to 10 V to the VF terminals A18 and 19 Set to 60 Hz 4 Connect multimeters to TRIP FAR and FCX relay outputs to monitor relay status Note a timer may be hooked up to start on FAR relay closure and stop on FCX closure to check timing 10 2 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 except for following exceptions e MOTOR Collr Ring b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 2 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close Set function generator to 60 Hz and turn on Open MX switch Lower frequency to 5 Hz Relay should not apply field ak V N Lower frequency to just under 3 Hz 5 of 60 Hz FAR contact should close followed by FCX contact 1 second later FIELD IS APPLIED message should momentarily flash on screen Table 10 1 COLLECTOR RING MOTOR FIELD TEST RESULTS SETPOINTS INPUT EXPECTED RESULTS SLIP FCX TIME FREQUENCY FAR OPERATION FAR OPERATION FCX TIME 10 2 SPM Synchronous Motor Protection and Control GE Multilin 10 FUNCTIONAL TESTS 10 3 COLLECTOR RING MOTOR POWER FACTOR TEST 10 3 1 SETUP 1 Connect the Va and Vb terminals of
33. 315 270 0 Rotor Angle Applied lg Trapped Flux i Field Discharge Loop Opened D Induced Figure 3 3 TYPICAL ROTOR FLUX AND CURRENT AT PULL IN 3 2 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 1 OVERVIEW Approximate Stator Position For Maximum Field Pole Flux Depending Upon Design amp Ras Rotation p self 45 4 Approximate Stator Position For Maximum rf Torque When Maximum Rotor Flux Occurs At 45 Note Angular displacement of rotor with respect to stator is given a negative sign to indicate the motoring condition Figure 3 4 ANGULAR DISPLACEMENT OF ROTOR It has been established that salient pole torque near synchronous speed is a function of both slip and field dis charge resistance The combined effects of cage torque and salient pole torque for a typical motor are shown below The effect of a higher value of discharge resistance on a medium torque motor are shown in Figure 3 6 FIELD DISCHARGE RESISTANCE MEDIUM STARTING TORQUE Obviously without salient pole torque the motor would cease to accelerate certain loads at some point on the speed axis Rois Total Cage Total Contribution 2 Cage x Contribution 8 z 100 8 Salient Pole Y Contribution x Salie
34. 71 2 SPM TEST CHECKS 7 1 3 START UP DESCRIPTION 7 2 DISPLAY AND MESSAGES 17 2 DISPLAY ie ier a ete 7 3 7 2 2 SPM 55 209 7 3 7 3 REGULATOR TUNE UP 7 31 INSTRUCTIONS esses nennen tnnt tete iterat inane tn ate ita trinitate anas 7 5 7 4 TROUBLESHOOTING 7 4 08 TROUBLESHOOTING 2 ene nenne 7 6 7 5 PROGRAMMING 7 5 1 PROGRAMMING EXAMPLE ssssseenee ee ee e e een ene 7 8 7 6 DOS AND DON TS DOS TEE 7 12 726 20 DONS cce 7 12 7 7 FREQUENTLY ASKED QUESTIONS TIA SPM FAQ CS 7 13 7 8 REVISION HISTORY 1297 EIRMWARE Snt a a E eti er E 7 15 8 1 VOLTAGE DIVIDER NETWORK 8 1 1 GE MUETILIN VDN erm recie ines 8 1 842 GE MEBANE VDN tret once D ru ended 8 2 8 2 FIELD CURRENT CALIBRATION MODULE 82 1 GE MULTILIN MODULE tnter teret rn teda 8 3 8 3 DC CURRENT TRANSFORMER 8 31 DESCRIPTION tette eene m ne ee ee citer iier 8 6 9 1 IMPLEMENTATION MODBU S PROTOGCOQDL net 9 1 2 PERFORMANCE REQUIREMENTS 9 1 3 SETPOINTS 9 1 4 EXECUTE OPERATION COMMAND CODES COIL NUMBERS 9 2 MEMORY MAPPING 9 2 1 MODBUS MEMORY oe 9 22 FORMAT CODES riens pande ie anteriori 9 7
35. C CT PRIM to 100A SCROLL Key s to select value of 100 and then SELECT ENTER key to accept new value HIGH FIELD 10 00 ENTER to modify SCROLL DOWN key to move to the HIGH FIELD setpoint This value will remain as is FIELD AMPS OFF ENTER to modify FIELD AMPS 45 SCROLL to change SCROLL DOWN key to move to the FIELD AMPS setpoint then SELECT ENTER to select the setpoint Change the existing value of FIELD AMPS to 45 SCROLL Key s to select value of 45 and then SELECT ENTER key to accept new value FIELD VOLTS 25 ENTER to modify SCROLL DOWN key to move to the FIELD VOLTS setpoint then SELECT ENTER to select the setpoint FIELD VOLTS 125 SCROLL to change Change the existing value of FIELD VOLTS to 125 SCROLL Key s to select value of 125 and then SELECT ENTER key to accept new value INC SEQ DLY 100 s ENTER to modify SCROLL DOWN key to move to INC SEQ DLY setpoint then SELECT ENTER to select the setpoint INC SEQ DLY 15s SCROLL to change Change the existing value of INC SEQ DLY to 15 seconds SCROLL Key s to select value of 15 and then SELECT ENTER key to accept new value 7 10 REG PF OFF ENTER to modify SPM Synchronous Motor Protection and Control SCROLL DOWN key to move to REG PF set point then SELECT ENTER to select the setpoint GE Multilin 7 TESTING AND TROUBLESHOOTING 7 5 PROGRAMMING Table 7 2 PROGRAMMING EXAMPLE Sheet 4 of 4 KEYPRESS DISPLAY COMME
36. D LOSS TRIP The field current is less than the field current setpoint The exciter should be checked for proper output and the field current setpoint should be checked e MISSING VOLTAGE The SPM is NOT receiving a power factor reference voltage input to terminals V4gxr and and PF REF is set to External 5801 CAGE TRIP The SPM has tripped the motor off line due to a squirrel cage protection trip The motor must be allowed to cool for the amount of time displayed by the SPM e PULL OUT TRIP A trip has been caused by motor line current exceeding 4 times the full load current set point for longer than the PF delay time NCOM SEQ TRIP The SPM has tripped the motor due to an incomplete sequence fault The source of the fault should be located before the motor is restarted e PULL OUT TRIP The SPM has tripped the motor due to pull out e FIELD OVERTEMP The SPM has tripped the motor due to overtemperature on the field windings FAIL TO RESYNC The SPM has tripped the motor due to a failure to resynchronize e START INHIBITED Ready in xxx min The SPM has tripped the motor and will not allow a restart attempt for xxx minutes GE Multilin SPM Synchronous Motor Protection and Control 7 3 7 2 DISPLAY AND MESSAGES 7 TESTING AND TROUBLESHOOTING RUN TIME FAULT The CPU has calculated a series of values within a set time limit that are out of their valid ranges Power must be cycled to the unit to correct th
37. E is set to 3 00 then the motor can run at 3 00 x 10 sec 30 seconds at 50 speed GE Multilin SPM Synchronous Motor Protection and Control 5 5 5 2 SETPOINTS MENU 5 SETPOINTS 5 2 13 DIRECT CURRENT CT PRIMARY RATING DC CT PRIM 5A Range 5 to 1000 A ENTER to modify Step 1 FUNCTION The primary ampere rating not the ratio stamped on the DC Current Transformer DCCT is entered here if one turn is passed through the DCCT window If more than one turn is used divide the DCCT primary ampere rating by the number of turns and enter this number here MOTOR TYPE Collector Ring and Brushless NOTE The DCCT is available as a separate accessory in the PG2SPM or PG4SPM packages along with the neces sary CM calibration module These packages are required for overtemperature or current loss protection The value entered here affects the valid range of the HIGH FIELD HI EXC FIELD setpoint APPLICATION The standard DCCT200 from PG2SPM package has a rated 200 A primary and a 50 mA secondary 4000 1 ratio The DCCT terminals connect to CM terminals 7 and 8 the polarity not important Multiple turns of field cable through the DCCT window may be required to obtain the proper effective CT ratio Determine your motor rated field or exciter field current and use the following table to determine the number of field cable turns through the DCCT and effective rating to enter as the DCCT PRIM setpoint Table 5 1 DCCT SETUP
38. GE Industrial Systems SPM SYNCHRONOUS MOTOR PROTECTION AND CONTROL Instruction Manual Software Revision 210 000 Manual P N 1601 0072 A9 GEK 113045B Copyright 2008 GE Multilin GE Multilin 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 201 2098 US IND CONT EQUI 2 57838 Internet http www GEmultilin com 1509001 2000 UA TABLE OF CONTENTS 1 INTRODUCTION 1 1 OVERVIEW 1 13 1 GENERALE DESCRIPTION taie tette divans 1 1 1 1 2 FUNCTIONAL OVERVIEW entretenir terree dete dnd 1 1 1 2 ORDERING 1 2 4 ORDER CODES eene ure dioec kis 1 3 12 2 YWACCESSORIES 42 1 3 1 3 SPECIFICATIONS 1 3 1 2 INSTALLATION 24 1 24 2 TECHNICAL 07 1 4 2 1 OVERVIEW DESCRIPTION E ELEMENTS A SYNCHRONOUS MOTOR CONTROLLER 2 2 MECHANICAL INSTALLATION 2 2 1 2 2 2 2 2 3 2 2 4 2 2 5 UNPACKING THE cco sot cscs cos cos eet 2 2 REMOVING THE DRAWOUT 2 2 INSERTING THE DRAWOUT 2 2 MOUNTING THE SPM SPM MOUNTING ACCESSORIES 2 3 ELECTRICAL INSTALLATION 2 3 1 2 3 2 2 3 3 2 3 4 2 3 5 2 3 6 2 3 7 2 3 8 2 3 9 2 3 10 2 3 11 2 3 12
39. GING STATUS MODE PARAMETERS 4 14 VOLTAGE DIVIDER NETWORK 8 1 WARRANTY RA 1 WEBS sinet E Ph cuite 4 2 SPM Synchronous Motor Protection and Control iii INDEX iv SPM Synchronous Motor Protection and Control GE Multilin NOTES GE Multilin SPM Synchronous Motor Protection and Control GE POWER MANAGEMENT WEBSITE The latest product information for the SPM Synchronous Motor Protection and Control relay is available on the Internet via the GE Multilin home page http www GEmwultilin com GE Industrial Systems GEHome GE Industrial Home GEPowerManagement Online Store AboutUs Feedback 1 Order Your Next _ Relay Online gi 5 Today A gt E P Man t 7 Personal Home Page j ower anagemen ML 1 2 Online Store Index By Product Name Press Releases Index By Function Advertisements y INFO PLAYER o mma 2m Xd IO a Ordering Sales Offices Contact Us Feedback Comments Online Store Contact Information Resources QUICK SEARCH Support Subscriptions AboutUs Related Links Call Center Employment Technical Documents Training WHAT S NEW System Solutions See the solutions we can provide you with b A new generation of relays arrives GE Industrial Systems PU more Privacy Policy Terms and Conditions 91997 1998 1999 General Electric Company Click her
40. HEN MOTOR RUNNING ONLY SEEN WHEN MOTOR G E KEY ENTER KEY SCROLL KEY RUNNING 701769A4 CDR 5 2 SETPOINTS MENU 5 SETPOINTS 5 2 1 POWER FACTOR TRIP PF TRIP 0 60 Range 0 60 to 1 00 ENTER to modify Step 0 01 FUNCTION The PF TRIP setpoint represents the value of lagging power factor that causes a trip or resynchronizing attempt during motor operation For example if the trip power factor is set at 0 85 lagging 0 85 the SPM trips if the power factor falls below 0 85 for a time longer than the PF DELAY setpoint MOTOR TYPE Collector Ring and Brushless NOTE The SPM automatically suppresses the power factor trip element until the programmed FCX DELAY times out 5 2 2 POWER FACTOR DELAY PF DELAY 1 05 Range 0 1 to 10 0 seconds ENTER to modify Step 0 1 FUNCTION The PF DELAY setpoint represents the elapsed time delay after the power factor dips below the PF TRIP setpoint or after the line current remains greater than four times the FL AMPS setpoint before the SPM initiates tripping action for power factor trip or pull out trip MOTOR TYPE Collector Ring and Brushless 5 2 3 POWER FACTOR SUPRESSION PF SUPP 6 FLC Range 6 50 FLC ENTER to modify FUNCTION Power factor suppression is used to inhibit PF TRIP or PULL OUT trip action when the line current is less than the setpoint percentage of the full load current FL AMPS setpoint MOTOR TYPE Collector Ring and Brushless
41. IEW 3 22 2 00 82 51 4 25 108 PANEL DRILLING s 3 40 ae 86 2 mim 0 228 5 8 DIA PLACES Figure 8 10 DCCT PHYSICAL DIMENSIONS 2 00 51 70177541 DWG 8 6 SPM Synchronous Motor Protection and Control GE Multilin 9 MODBUS COMMUNICATIONS 9 1 IMPLEMENTATION 9 1 1 MODBUS PROTOCOL The SPM supports a subset of the AEG Modicon Modbus RTU serial communication standard using a 2 wire RS485 interface The following commands are supported Modbus names are in brackets 03 Read Setpoints and Actual Values read holding registers 04 Read Setpoints and Actual Values read input registers 05 Execute Operation force single coil coil number 1 emulates the relay reset function 06 Store Single Setpoint preset single register 07 Read Device Status read exception status 16 Store Multiple Setpoints preset multiple registers 9 1 2 PERFORMANCE REQUIREMENTS Baud rates 300 600 1200 2400 4800 9600 19200 38400 57600 115200 Turn around time less than 50 ms from receipt of last character to transmission of first character Two wire RS485 connection Data frame fixed at 1 start 8 data and 1 stop bit 9 1 3 SETPOINTS The following setpoints are required to set up the Modbus communications port CONFIGURATIONS RTU ADDRESS Range 1 to 254 Set to the SPM address must be unique for each relay on the channel CO
42. L em CONTRAST DIAL and actual values for easy reference pes Pa K J Lightens or darkens display Power Factor DC Amps DC Volts Exciter Field Ohms FOX Delay CONTRAST STAT SCROLL Motor Hours ISP Trip Ctr FLP Trip Cir PULLDOWN DOOR PO Trip Ctr n Resync Ctr C y Hides menu when not in use NO V Trp Ctr Exc Trip Ctr PF Trip Ctr SCP Trip Ctr Incomplete Sequence Delay FOT Trip Ctr REAR VIEW 51 CASE Compact S1 rugged metal bakelite case Fits standard cutout TERMINAL BLOCK A RELAYS TRIP Normally open failsafe trip relay FAR Field application relay FCX Autoloading of the motor EXCITER Exciter voltage inputs Connected via DCCT and CM FIELD DC field voltage input REDUCED VOLTAGE Contact input for reduced voltage starting Motor ON input Exciter current input Power Factor reference voltage for seperately powered option INPUTS RS485GND OUTPUTS POWER FACTOR 0 10VDC analog signal MOTOR LINE CURRENT 2 Phase current inputs Accept 8 wire 701750AF CDR Figure 2 4 PANEL AND TERMINAL LAYOUT GE Multilin SPM Synchronous Motor Protection and Control 2 5 2 3 ELECTRICAL INSTALLATION 2 INSTALLATION 2 3 2 GROUNDING The SPM relay must be solidly grounded to a suitable system ground Extensive filtering and transient protec tion has bee
43. MOTOR TYPE Collector Ring and Brushless GE Multilin SPM Synchronous Motor Protection and Control 5 3 5 2 SETPOINTS MENU 5 SETPOINTS 5 2 7 AC CT PRIMARY RATING 50 5 5 2000 ENTER to modify Step 5 FUNCTION The phase CT ratio supplied with the starter must be entered here Enter only primary amperes A 5 A second ary is assumed MOTOR TYPE Collector Ring and Brushless NOTE The value entered here affects the valid range of the motor full load current FL AMPS setpoint 5 2 8 MOTOR FULL LOAD AMPS FL AMPS 25 Range 2 to 2000 ENTER to modify Step 1 Dependent on the AC CT RTG setpoint FUNCTION This setpoint is the motor nameplate full load current It is related to the AC CT RTG setpoint The minimum and maximum current is determined by the formula below Changes to the AC CT RTG setpoint may cause this set point to become invalid out of range minimum FL AMPS 2 x CERIS maximum FL AMPS AC CT RTG MOTOR TYPE Collector Ring and Brushless NOTE The value entered here affects the valid range of the motor locked rotor current LR AMPS setpoint 5 2 9 MOTOR LOCKED ROTOR AMPS LR AMPS 200 Range 4 to 24000 A ENTER to modify Step 1 Dependent on the FL AMPS setpoint FUNCTION This setpoint represents the motor locked rotor current and is related to the FL AMPS setpoint The minimum and maximum current is determined by the formula below Changes to th
44. N E DE 00 N amp 3 40 102 3 AN 88 a i e 4 m 6 107 xia 155 i PANEL DRILLING 6 25 159 d Inches mm 0 203 5 DIA gt ACES 4 4 PLACES 6 Figure 8 6 GE MULTILIN CM PHYSICAL DIMENSIONS AN Figure 8 7 GE MEBANE CALIBRATION MODULE 8 4 SPM Synchronous Motor Protection and Control GE Multilin 8 ACCESSORIES 8 2 FIELD CURRENT CALIBRATION MODULE 1 L a 4 16 0 22 0 46 MTG SLOT ra 4 PLACES 701402A2 DWG SIDE VIEW E RONT VIEW Figure 8 8 GE MEBANE CM PHYSICAL DIMENSIONS GE Multilin SPM Synchronous Motor Protection and Control 8 5 8 3 DC CURRENT TRANSFORMER 8 ACCESSORIES 8 3 1 DESCRIPTION The standard DCCT primary has a rated 200 A primary and a 50 mA rated secondary 4000 1 ratio DCCT ter minals connect to CM points 7 and 8 polarity not important Multiple turns of field able through the DCCT window may be required to obtain the proper effective CT ratio The DCCT is required to utilize field current and or field overtemperature features It is available in the optional PG2SPM or PG4SPM accessory packages Figure 8 9 DC CURRENT TRANSFORMER FRONT VIEW SIDE V
45. NFIGURATIONS BAUD RATE Set from 300 to 115k baud CONFIGURATIONS PARITY Set to none even or odd depending on configuration CONFIGURATIONS TURNAROUND Enter the minimum Modbus turnaround time 0 to 1000 ms 9 1 4 EXECUTE OPERATION COMMAND CODES COIL NUMBERS The following table lists the coil numbers which may be used in the Modbus force coil command Table 9 1 EXECUTE OPERATION CODES COIL NUMBER FUNCTION Simulate a keypad reset i e reset a trip after the condition has cleared Force the FAR into the energized state Force the FAR into the de energized state Un force the FAR reverting it to program control Force the FCX relay into the energized state Force the FCX relay into the de energized state Un force the FOX relay reverting it to program control Force the TRP relay into the energized state Force the TRP relay into the de energized state Un force the TRP relay reverting it to program control GE Multilin SPM Synchronous Motor Protection and Control 9 1 9 2 MEMORY MAPPING 9 MODBUS COMMUNICATIONS 9 2 1 MODBUS MEMORY MAP Table 9 2 MODBUS MEMORY MAP Sheet 1 of 5 GROUP ADDR DESCRIPTION RANGE STEP UNITS FORMAT FACTORY hex VALUE CODE DEFAULT Product ID Input registers at addresses 0000 to 007F PRODUCT GE Product Device Code N A N A N A U16 40 ID Product Hardware Revision 1 to 26 N A Alpha N A Product Software Revision N A N A Revcode N A Pro
46. NTS Change the existing value of REG PF to 0 85 leading SCROLL REG PF 0 85 Key s to select value of 0 85 and then SELECT ENTER key to SCROLL to change accept new value SCROLL DOWN key to move to REG GAIN setpoint This setpoint is correct REG GAIN 10 ENTER to modify SCROLL DOWN key to move to STABILITY setpoint This STABILITY 1 setpoint is correct ENTER to modify SCROLL DOWN key to move to REG OUTPUT setpoint then REG OUTPUT 5V SELECT ENTER to select the setpoint ENTER to modify Change the existing value of REG PF to 10V SCROLL Key s to REG OUTPUT 10 V select value of 10 and then SELECT ENTER key to accept new SCROLL to change value SCROLL DOWN key to move to FLOOR VOLTS setpoint then FLUUR VOLTS 00 SELECT ENTER to select the setpoint ENTER to modify Change the existing value of FLOOR VOLTS to 5 00 SCROLL FLOOR VOLTS 5 00 Key s to select value of 5 00 and then SELECT ENTER key to SCROLL to change accept new value Exit out to SETPOINT SETPOINTS xit out to S OINTS menu ENTER for menus SAVE CHANGES ENTER to save PROGRAMMING MODE SCROLL PASSWORD TEST MODE SCROLL for tests Coll Ring Motor SPM READY Save setpoint changes Exit out to PROGRAMMING MODE menu Exit out to TEST MODE menu Ready mode display Multilin SPM Synchronous Motor Protection and Control 7 11 7 6 DOs AND DON Ts 7 TESTING AND TROUBLESHOOTING
47. OMMISSIONING APPENDIXA A 1 2 BRUSHLESS SETTINGS DESCRIPTION PF TRIP DEFAULT 0 60 USER VALUE PF DELAY 1 0s PF SUPP 6 FLC PF MODE ridethru FAR DELAY Os FCX DELAY 1s AC CT RTG 50 5 FL AMPS LR AMPS 25 SYNC SLIP STALL TIME RUNTIME DC CT PRIM HI EXC FIELD EX FLD AMPS FLD IE DLY EX FLD VOLTS EX VLT DELAY INC SEQ DLY REG PF REG GAIN STABILITY REG OUTPUT FLOOR VOLTS DESCRIPTION DEFAULT USER VALUE CONFIGURATIONS MOTOR Coll Ring LINE FREQ 60 Hz PF REF internal RTU ADDRESS 1 BAUD RATE 19 2k PARITY None TURNAROUND 5 STAT read only PASSWORD 0000 CALIBRATION FS EXC VOLT FS EXC AMPS FS MTR AMPS SPM Synchronous Motor Protection and Control GE Multilin APPENDIX B B 1 WARRANTY B 1 1 WARRANTY GE MULTILIN RELAY WARRANTY General Electric Multilin Inc GE Multilin warrants each relay it manu factures to be free from defects in material and workmanship under normal use and service for a period of 24 months from date of ship ment from factory In the event of a failure covered by warranty GE Multilin will undertake to repair or replace the relay providing the warrantor determined that it is defective and it is returned with all transportation charges prepaid to an authorized servic
48. OUS MOTOR APPLICATIONS lA V ine gt gt E Load Angle 1 Motor at Unity PF Normal Load Parallel with Line Volts 4 1 D 2 gt lt 3 gt 4 4 5 A POWER Line e 15 Drop FACTOR LEAD 07 08 LEAD 0 9 2 Motor PF Swings AS 09 Leading When Line Voltage Drops and Excitation Remains 0 8 Constant Due to Field Time Constant 07 LAG gg 0 5 04 IA Vine 0 05 10 15 20 gt gt Motor Does Not Pull Out PF Approx 1 0 Time Seconds Motor PF Becomes Slightly Lagging When Excitation Drop Equals Line Drop Qm SK 09 4 Motor PF Dips Heavily Lagging Eg Generated EMF When Line Voltage is Restored la 7 Line Amperes Ra Armature Resistance XA Arm Reactance Figure 3 11 POWER FACTOR RESPONSE TO LINE VARIANCE 3 14 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 COLLECTOR RING MOTORS 3 2 9 POWER FACTOR DETECTION amp INDICATION OVERHAULING LOAD Many synchronous motor applications require that the motor operate with an overhauling load in generating mode The power factor protection must be able to provide pull out protection during overhauling load condi tions The SPM provides pull out protection for the synchronous motor operating in both the generating and the motoring mode However conventional power factor detection and indication for moto
49. PM on page 2 1 2 2 2 REMOVING THE DRAWOUT RELAY 1 Remove the faceplate assembly carefully by pushing in on the quick release tabs on the front of the SPM and pulling the faceplate assembly forward Once the faceplate has pivoted forward gently lower the face plate so that it clears the tabs on the bottom of the frame 17 DO NOT let the faceplate assembly dangle from the connecting wires NOTE 2 Carefully disconnect the ribbon cable from the cradle assembly 3 Remove the paddle and open the top and bottom locking tabs The relay can now be removed from the case 2 2 3 INSERTING THE DRAWOUT RELAY 1 Slide the relay into the case and close the top and bottom locking tabs Insert the paddle into the opening at the bottom of the relay Carefully re connect the ribbon cable to the cradle assembly 17 DO shift or skew the ribbon connector NOTE 4 Re mount the faceplate assembly to the case from the front panel Slide the faceplate onto the tabs on the bottom of the frame and then pivot it up into position over the quick release tabs The faceplate should gen tly snap into place 2 2 4 MOUNTING THE SPM Mounting the SPM requires careful attention to the following instructions DE ENERGIZE ALL EXISTING EQUIPMENT BEFORE INSTALLING NEW EQUIPMENT CAUTION 1 Remove the relay from the case 2 Prepare the mounting hole in the panel to dimensions shown in Figure 2 2 PHYSICAL DIMENSIONS 3 Slide the case into the panel from
50. Power Factor Test in the previous section 2 Connect timer to TRIP relay 10 7 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 7 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close 2 Turnon current source Open MX switch FAR contact should close followed by FCX contact FIELD IS APPLIED message should momentarily flash on screen PF metered value will now be displayed along with other metered values Vary voltage angle as in table below and check PF reading Table 10 6 BRUSHLESS MOTOR PF TRIP TEST RESULTS SETPOINTS INPUT EXPECTED RESULTS PF TRIP PF DELAY ANGLE EXPECTED PF TRIP TIME GE Multilin SPM Synchronous Motor Protection and Control 10 7 10 8 AC CURRENT METERING AND PULL OUT TEST 10 FUNCTIONAL TESTS 10 8 1 SETUP 1 Connect as for Collector Ring or Brushless PF Test 10 8 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 except for the following MOTOR Collr Ring if testing for Collector Ring application b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 except for the following FLAMPS 50 10 8 3 TEST 1 Apply control power to relay and
51. R WITH SYNCHRONOUS MOTOR GE Multilin SPM Synchronous Motor Protection and Control 3 17 3 3 BRUSHLESS CONTROLLER 3 SYNCHRONOUS MOTOR APPLICATIONS 3 3 3 STARTING THE BRUSHLESS MOTOR The brushless motor is started by first applying power to the stator windings then applying DC to the exciter field See Figure 2 3 TYPICAL WIRING DIAGRAM on page 2 4 for details There are two basic timing func tions a brushless controller must provide during start 1 Apply DC to exciter not main field a given preset time after stator windings are energized 2 Enable the power factor pull out protection and provide a contact for signaling external automatic motor loading devices for motor loading This is determined by a second given pre set time delay that allows suf ficient time after the application of the exciter field for the motor to synchronize and stabilize Both of these times can be entered as setpoint parameters in the SPM See programming Section 4 9 2000 1500 12771 Stall Time 30 Sec Locked Rotor 6XFLC 1000 900 B Stall Time 10 Sec 800 Locked Rotor 6XFLC 700 Stall Time 2 Sec 600 Locked Rotor 6XFLC 500 400 300 200 100 90 80 70 60 50 40 Trip Time seconds 30 8 91 15 2 3 4 5 6 7 8 10 Trip Current Multiples of Programmed Full Load Curr
52. READY mes sage and TRIP relay should close 2 on current source and function generator for Collector Ring Open MX switch 4 FAR contact should close followed by FCX contact FIELD IS APPLIED message should momentarily flash on screen DC VOLTS metered value will now be displayed along with other metered values Vary DC voltage as in table below and record reading Table 10 8 EXCITER FIELD VOLTAGE METERING RESULTS INPUT DC VOLTS EXPECTED ACTUAL TOLERANCE READING READING V DC GE Multilin SPM Synchronous Motor Protection and Control 10 9 10 10 EXCITER FIELD CURRENT METERING TEST 10 FUNCTIONAL TESTS 10 10 1 SETUP 1 Connect as in Section 10 3 COLLECTOR RING MOTOR POWER FACTOR TEST on page 10 3 or Sec tion 10 6 BRUSHLESS MOTOR POWER FACTOR TEST on page 10 6 2 Connect DC Voltage source to terminals A24 and A25 ensure correct polarity Note this test is done as secondary injection testing without the CM or DCCT 10 10 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 except for the following MOTOR Collector Ring if testing for Collector Ring application b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 10 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close 2 on curren
53. SCRIPTION RANGE FORMAT FACTORY CODE DEFAULT SYSTEM FULL SCALE EXCITER DC VOLTAGE 0 610 1 5 U16 100 CALIBRATION FULL SCALE EXCITER DC AMPS 0 6 to 1 5 U16 100 FULL SCALE MOTOR AC AMPS 0 6 to 1 5 U16 100 Reserved Reserved POWER PF TRIP 0 60 to 1 00 2decS16 FACTOR PF DELAY 0 1 to 10 0 1decU16 PF SUPPRESSION 6 or 50 U16 PF MODE 0 or 1 PFmode Reserved 4 Reserved FIELD LOAD FAR DELAY APPLICATION FCX DELAY Reserved Reserved MOTOR AC CT RATIO 5 to 2000 AC SYSTEM FULL LOAD AMPS 2 to 2000 2 LOCKED ROTOR AMPS 4 to 24000 Reserved Reserved STARTING SYNCHRONOUS SLIP 0 5 to 10 0 1decU16 SETPOINTS STALL TIME 11040 U16 RUN TIME 1 05 1 46 Runtime 2 05 3 00 stall time INCOMPLETE SEQUENCE DELAY 1 to 100 or OFF S U16 max 1 OFF 1 to 200 or OFF Reserved Reserved Range for collector ring motors Range for brushless motors 1 The access password must be written correctly before any setpoints can be written via Modbus The password is initially the same as the default password but the two passwords are stored separately so the keyboard can not be used to change the communications password and vice versa 2 The allowable range of FLA is as follows the minimum full load amps value is 2 5 times the CT ratio the maximum is equal to the CT ratio 3 The locked rotor current is range dependent on the FLA se
54. SUPP 6 FLC 5 RTU ADDRESS 1 t BAUD RATE 19 2K 4 5 TURNAROUND 5 _ STAT READ WRITE a PASSWORD 000 GE Multtilin PF MODE RIDETHRU 5 5 DELAY 1s RTG 50 5 FL AMPS 25 gs LR AMPS 200 0 5 SYNC SLIP 5 096 STAL TIME 105 En RUNTIME 1 05xST ENE UNE DC CT PRIM 5A 5 5 FLD AMPS OFF 5 FLD IE DLY N A EX FLD VLTS OFF EX VLT DLY N A po INC SEQ DLY OFF REG 0 00 REG GAIN 1 STABILITY 1 CYC REG OUTPUT IV FLOOR VOLT 0 0 Figure 5 1 SPM DISPLAY STRUCTURE SPM Synchronous Motor Protection and Control OUTPUT VOLT HIGH FIELD OFF FIELD AMPS OFF Pl FIELD VOLTS OFF SC PROT TEST SYNC AND PF TES PEO G E 5 5 1 1 DESCRIPTION ONLY SEEN WHEN MOTOR STAT MODE SCOLL FOR MENUS 5 MOTOR HRS O i ISP TRIP CTR FLP TRIP CTR gs PO TRIP CTR s RESYNC CTR 4s NO V TRP CTR NE IN EXC TRIP CTR O 4s PF TRIP CTR O SCR TRIP CTR FOT TRIP RUNNING AND WITH OPTIONAL PF REGULATION OPTIONAL PF REGULATION BRUSHLESS ONLY RING TYPE ONLY NOT SEEN W
55. Software number of the setpoint file e g 20x is different than the Main Software number of the firmware noted in Step 2 as 201 use the pull down tab to select the revision code that matches the firmware and click OK File Properties PLEASE NOTE When downloading setpoint file information the K version and options entered in the FILE PROPERTIES section should match the information in the SPM relay Cancel SETPOINT FILE OPTIONS Comment i Print Screen Software Version Revision 2 1 Revision 2 0 INSTALLED OPTION Power Factor Regulation Feature NOT INSTALLED 5 Select the File gt Save menu item to save the setpoint file See the previous section for instructions on loading this setpoint file to the SPM relay GE Multilin SPM Synchronous Motor Protection and Control 4 7 4 1 SPMPC SOFTWARE 4 USER INTERFACE 4 1 8 PRINTING SETPOINTS amp ACTUAL VALUES 1 Start the SPMPC software 2 Select the File gt Open menu item to open a previously saved setpoint file or establish communications with a connected SPM to print the current setpoints 3 Select the File gt Print Setup menu item and select one of the printing options actual values setpoints or setpoints for enabled features Click OK to continue Print Setup Lx C Actual Values C Setpoints All Cancel 6 Setpoints Enabled Features Printer Setup Font Setup Top fa Em Left Em Bottom 2 Em
56. Step 0 1 for values 10 A 1 for values 210 A EX FLD AMPS OFF Brushless Range OFF 0 1 to 1000 A ENTER to modify Step 0 1 for values 10 A 1 for values 210 A FUNCTION The value programmed here determines the minimum permissible field current that the SPM recognizes as valid If the field current falls below this setpoint the SPM will trip and display a FIELD LOSS TRIP fault A sepa rate accessory package PG2SPM or PG4SPM is required to utilize this feature MOTOR TYPE Collector Ring or Brushless 5 2 16 FIELD UNDERCURRENT DELAY FLD IE DLY 0 3 s Range 0 3 to 5 0 seconds ENTER to modify Step 0 1 second FUNCTION The field undercurrent delay represents the time delay that will elapse after the Field Amps falls below the pro grammed setpoint before the SPM initiates tripping action for Field Undercurrent FIELD LOSS TRIP The Field Amps Option must be enabled before this feature can be used MOTOR TYPE Collector Ring or Brushless 5 2 17 FIELD UNDERVOLTAGE FIELD VOLTS OFF Collector Ring Range OFF 1 to 200 V ENTER to modify Step 1 EX FLD VLTS OFF Brushless Range OFF 1 to 200 V ENTER to modify Step 1 FUNCTION This parameter determines the field undervoltage that will initiate a CHECK EXCITER condition For example if the exciter normally provides 100 V to the field circuit and this setpoint is programmed for 30 V then the SPM will trip and display CHECK EXCITER if the field voltage falls below the setpo
57. T TEST An internal SCP test frequency is inserted into the SCP program After a time delay corresponding to the STALL TIME setpoint the display reads SQL CAGE TRIP Press any key to reset e Synchronization and Power Factor Test SYNC AND PF TEST An internal slip frequency is injected into the synchronizing circuitry and slowly glides downward simulating an accelerating motor When this frequency matches the SYNC SLIP setpoint the display flashes FIELD IS APPLIED and the FAR relay picks up followed by the FCX after the FCX DELAY time setpoint Next the SPM automat ically tests the power factor circuitry by internally generating a test power factor signal No operator interface is required to proceed from the synchronizing test to the power factor test This signal slowly decreases until it dips below the PF TRIP setpoint After the PF DELAY setpoint time the dis play reads PWR FACTOR TRIP Press any key to reset the unit If SPM is in the RESYNC mode the SPM may attempt to re synchronize If it does the FIELD IS APPLIED message is displayed momen tarily before a power factor trip occurs 5 Toleave TEST MODE press and release the GE key until SPM READY is displayed again BE SURE TO STOP THE MOTOR AND DE ENERGIZE ALL POWER BEFORE CHANGING ANY LEADS WARNING 7 1 3 START UP DESCRIPTION Closing the feeder to the controller unit provides power to the control circuits and to the SPM Energizing the SPM causes the TRIP relay contacts
58. UX CONTACT RM 1 FROM THE FINAL STEP CONTACTOR HERE TO EXCITER POWER SUPPLY 1 1 E gt topic OR COMPUTER gt FIELD PF ANALOG OUTPUT OR CONTACTOR PF REG CONTROL SIG OUTPUT IF PF REGULATOR OPTION USED FOR SEPARATELY SUPPLIED POWER FACTOR REFERENCE VOLTAGE OPTIONAL CONNECTION FIELD CURRENT CALIBRATION MODULE CM BRUSHLESS amp COLLECTOR RING 701756AN CDR COLLECTOR RING 701751 DWG BRUSHLESS 701753 DWG Figure 2 3 TYPICAL WIRING DIAGRAM 2 4 SPM Synchronous Motor Protection and Control GE Multilin 2 3 ELECTRICAL INSTALLATION FRONT VIEW QUICK RELEASE TABS Used to remove display for easy access to drawout GE KEY Used to enter or exit the different modes of the SPM These are Syne Protection Control Standby Test Statistics and yac Programming modes LCD DISPLAY Back lit 32 character display for setpoints actual values and status Programmable auto scan sequence for unattended operation LOCKING PROVISION A wire lead seal can be used to prevent unauthorized removal of relay SCROLL ENTER KEY SCROLL KEYS Used to scroll through the various menus and change setpoint parameter values Used to make a selection or acts as an enter key DISPLAY FUNCTIONS Items in green and white come standard DISPLAY FUNCTION MENU items Menu of all accessible setpoints DISPLAY SCROLL SETPOINT SCROL
59. as failed during self test e INCOMPLETE SETUP The internal configuration information not user selectable has been lost and the unit will not function The SPM must be returned to GE Multilin for correction of this problem e CALIBRATION REQD The SPM has lost the calibration information stored in its non volatile memory The unit must be returned to GE Multilin for correction of this problem e FORCED WDT TRIP The TRIP relay has been told to de energize but is still showing as energized In this condition the CPU forces a watchdog timer trip in an attempt to de energize the TRIP relay Users Manual Consult the user manual for correction Press any key to clear a trip messages such as PWR FACTOR TRIP or SQL CAGE TRIP NOTE DO NOT DEFEAT THE MOTOR RESTART PROTECTION PROVIDED BY THE SPM BY SWITCH ING THE CONTROL POWER ON AND OFF THE ABOVE ACTION RESETS THE STALL TIME caution COUNTERS WHICH DEFEATS MOTOR PROTECTION FROM FREQUENT RESTARTS 7 4 SPM Synchronous Motor Protection and Control GE Multilin 7 TESTING AND TROUBLESHOOTING 7 3 REGULATOR TUNE UP 7 3 1 INSTRUCTIONS Following these instructions will permit tune up of the regulator during the initial start up of the motor Perform all start up procedures in Section 7 1 START UP PROCEDURE on page 7 1 before proceeding 1 Enter the following initial values into the SPM see Section 5 3 OPTIONAL POWER FACTOR REGULA TION SETPOINTS on page 5 10 for additional info
60. ase voltage source to SPM terminals B9 and B10 control power and PF voltage reference respectively Program for 120 V AC 2 Connect the Switch to terminals A11 and A12 of the SPM MX input Close switch Connect multimeters to TRIP and FCX relay outputs to monitor relay status 4 Connect a timer to start on MX switch opening and stop on FAR closure to check timing Repeat with FAR and FCX respectively for FCX timing 10 5 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 5 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close Open MX switch FAR contact should close after FAR DELAY expires followed by FCX contact FIELD 15 APPLIED message should momentarily flash on screen Table 10 4 BRUSHLESS MOTOR FIELD APPLICATION TEST RESULTS SETPOINTS RESULTS FAR DELAY FCX DELAY FAR OPERATION FCX OPERATION 0 1 10 5 60 10 GE Multilin SPM Synchronous Motor Protection and Control 10 5 10 6 BRUSHLESS MOTOR POWER FACTOR TEST 10 FUNCTIONAL TESTS 10 6 1 SETUP 1 Connect the Va and Vb terminals of the 3 phase tester to SPM terminals B9 and B10 control power and PF voltage reference respectively Program for 120 V AC To test the OPTIONAL PF REFERENCE input connect Va an
61. can be decreased by selecting a higher RUNTIME curve setting or by setting a longer STALL TIME Note If either of these changes are done make sure that you have not gone beyond the motor manufacturer s specifi cations To avoid lockouts entirely tripping or stopping the motor during or shortly after a start should be avoided where possible 7 14 SPM Synchronous Motor Protection and Control GE Multilin 7 TESTING AND TROUBLESHOOTING 7 8 REVISION HISTORY 7 8 1 FIRMWARE FIRMWARE REVISION 109 000 Original firmware revision for BETA test units delivered from GE Multilin in Plainville FIRMWARE REVISION 151 000 All features made standard except power factor regulation e Check exciter field disabled while starting e Off settings added to exciter field voltage current and resistance elements Transient immunity improved via disabling unused inputs to processor FIRMWARE REVISION 152 000 Display now refreshed every 30 seconds FIRMWARE REVISION 200 000 e Modbus communications added Self test changed e Off settings made uniform FIRMWARE REVISION 201 000 FAR relay not being released upon motor stopping error corrected FIRMWARE REVISION 202 000 Removed runtime error on starts when measured locked rotor exceeds programmed locked rotor Improved communications integrated FIRMWARE REVISION 203 000 incomplete sequence function will not operate when the motor type is selected as Collector Ring Instead
62. ccumulated numbers of resynchronization attempts Present when PF MODE is set to resync Available only when motor is collector ring type 6 2 6 MISSING EXTERNAL PF VOLTAGE REFERENCE COUNTER CTR 0 SELECT to modify FUNCTION Accumulated number of missing voltage trips Present when PF REF is set to external 6 2 SPM Synchronous Motor Protection and Control GE Multilin 6 ACTUAL VALUES 6 2 STATUS 6 2 7 CHECK EXCITER TRIP COUNTER EXC TRP CTR 0 SELECT to modify FUNCTION Accumulated number of check exciter trips 6 2 8 POWER FACTOR TRIP COUNTER PFTRPCTR 0 SELECT to modify FUNCTION Accumulated number of power factor trips 6 2 9 SQUIRREL CAGE TRIP COUNTER SCPTRPCTR 0 SELECT to modify FUNCTION Accumulated number of squirrel cage trips 6 2 10 FIELD OVERVOLTAGE TRIP COUNTER FOTTRPCTR 0 SELECT to modify FUNCTION Accumulated number of field overtemperature trips GE Multilin SPM Synchronous Motor Protection and Control 6 3 6 2 STATUS 6 ACTUAL VALUES 6 4 SPM Synchronous Motor Protection and Control GE Multilin 7 TESTING AND TROUBLESHOOTING 7 1 START UP PROCEDURE 7 1 1 INSPECTION Inspect all wiring and verify that the connections are clean tight and there is adequate clearance for all de vices All external wiring from the controller must be made in strict accordance with the main connection dia gram supplied with the controller While referring to the main con
63. d Vb to terminals 4 and 5 and 120VAC to B9 and B10 2 Connect la of the 3 phase tester terminals B3 and B4 and Ib to terminals B1 and B2 Polarity is critical Note outputs of 3 phase tester may have to be shorted if they cannot be turned off Program for 4 A Connect the Switch to terminals A11 and A12 of the SPM MX input Close switch 4 Connect multimeter to TRIP relay outputs to monitor relay status 10 6 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 except for the following REF External if testing the external PF voltage reference b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 6 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close 2 Turn on current source Open MX switch 4 FAR contact should close after programmed delay followed by FCX contact FIELD IS APPLIED message should momentarily flash on screen PF metered value will now be displayed along with other metered values Vary voltage angle as in table below and check PF reading Table 10 5 BRUSHLESS MOTOR PF TEST RESULTS ANGLE EXPECTED PF ACTUAL PF 10 6 SPM Synchronous Motor Protection and Control GE Multilin 10 FUNCTIONAL TESTS 10 7 BRUSHLESS MOTOR POWER FACTOR TRIP TEST 10 7 1 SETUP 1 Connect as for Brushless Motor
64. d current is obtained press ENTER to deselect FLOOR VOLTS Press x until the PF REG setpoint appears Program the desired power factor typically between 0 8 and 1 0 The control of the motor field current should now be in control of the closed loop power factor regula tor Press ENTER again to deselect the PF REG setpoint 6 Reset the REG OUTPUT setpoint to the original factory setting This setpoint has been chosen to match the input of the separate variable exciter 7 The regulator gain setpoint can probably be left at 10 However should instability hunting occur or if more optimum response is desired the gain may be increased or decreased as desired Press until REG GAIN appears the display and enter new setpoints range 1 to 100 using the same procedure as for the FLOOR and REG PF setpoints The optimum gain is the highest possible gain setting without power factor instability detectable by a fluctuating exciter output and power factor If instability still occurs then increase the value of the STABILITY setpoint as required to dampen the fluctuating power factor These parameters are automatically stored in the E2PROM when the motor is shut down Do not attempt to regulate 1 0 power factor with an unloaded or lightly loaded machine A synchro nous machine running unloaded at or near unity power factor is inherently unstable and will probably be tripped from power factor protection Adjust the FLOOR setpoint high enou
65. d field volt age but is the voltage which is essentially in time phase relation to the current through the resistor That is the current goes through zero at the same time the voltage goes through zero The SPM detects the proper rotor speed PRS and rotor angle PRA signal implemented in the Field Pro grammable Gate Array FPGA Outputs from the PRS and the circuits are used to determine the proper time to close the Field Application Relay FAR based on the percent synchronous slip setpoint When the proper rotor speed and the proper rotor angle conditions are met as determined by the FPGA the CPU delivers a sig nal to the FAR Relay so it can close its contact FAR1 FAR2 FAR picks up field contactor FC to apply excitation to the motor field and to open the field discharge resistor loop See Figure 2 4 PANEL AND TERMINAL LAY OUT on page 2 5 for details The speed at which the motor is to synchronize PRS be programmed from 90 to 99 596 of synchronous speed GE Multilin SPM Synchronous Motor Protection and Control 3 5 3 2 COLLECTOR RING MOTORS 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 2 RELUCTANCE TORQUE SYNCHRONIZING A lightly loaded synchronous motor connected to a low inertial load may pull into synchronism before the rotor poles are externally magnetized This is commonly known as reluctance torque synchronizing This magnetiza tion can result in sufficient torque to hold the salient poles in direct alignment with corre
66. duct Modification Number 0 to 999 N A U16 N A Reserved 4 Reserved Actual Values Input registers at addresses 0200 to OFFF MOTOR 0200 Motor Status Motorstatus STATUS 0201 Estimated Time to Trip for Stall U16 0202 Reserved Lo dl 020 Reserved TRIP 0210 Cause of Trip Tripcause N A 0211 Lockout Time 016 0212 Reserved L v l l l 021 Reserved LINE 0220 Instantaneous Line Current U16 N A CURRENT 0221 Filtered Line Current 016 N A 0222 Reserved 0223 Reserved 0224 Reserved LINE 0225 Instantaneous Motor Voltage U16 N A VOLIRGE 0226 Filtered Motor Voltage U16 N A 0227 Reserved 0228 Reserved 0229 Reserved Range for collector ring motors Range for brushless motors 1 The access password must be written correctly before any setpoints can be written via Modbus The password is initially the same as the default password but the two passwords are stored separately so the keyboard can not be used to change the communications password and vice versa 2 The allowable range of FLA is as follows the minimum full load amps value is 2 5 times the CT ratio the maximum is equal to the CT ratio 3 The locked rotor current is range dependent on the FLA setpoint the minimum is twice the full load amps and the maximum value is 12 times the FLA 4 REGULATOR OUTPUT must be greater than or equal to FLOOR VOLTS likewise FLOOR VOLTS
67. e AC CT RTG and or the FL AMPS set points may cause this setpoint to become invalid out of range minimum LR AMPS 2 x FL AMPS maximum LR AMPS 12 x FL AMPS MOTOR TYPE Collector Ring and Brushless 5 4 SPM Synchronous Motor Protection and Control GE Multilin 5 SETPOINTS 5 2 SETPOINTS MENU 5 2 10 SYNCHRONOUS SLIP SYNC SLIP 5 0 Range 0 5 to 10 ENTER to modify Step 0 1 FUNCTION The value stored here is the slip at which the SPM will close the field contactor FAR It is expressed as per cent slip MOTOR TYPE Collector Ring EXAMPLE To close the field contactor apply the field when the motor reaches 94 5 of synchronous speed the SYNC SLIP setpoint is determined as follows 100 speed 94 5 speed 5 5 sync slip 5 2 11 STALL TIME STALL TIME 10s Range 1 to 40 seconds ENTER to modify Step 1 FUNCTION This setpoint determines the allowable time that power may be applied to the motor during locked rotor condi tions This information may normally be found on the motor control data sheet available from the motor manu facturer MOTOR TYPE Collector Ring and Brushless 5 2 12 RUN TIME RUN TIME 1 05 x ST Range 1 05 1 46 2 05 3 00 x STALL TIME ENTER to modify FUNCTION Run time is the time that the motor may run at 5096 speed and is expressed as a multiple of the allowable motor stall time MOTOR TYPE Collector Ring EXAMPLE If the motor stall time is 10 seconds and RUN TIM
68. e amperes are displayed e When the field contactor closes the SPM momentarily displays FIELD IS APPLIED followed by the normal running display of line current field current if this option is furnished and motor power factor The indi cates leading power factor motor generating reactive power while indicates lagging power factor motor consuming reactive power The unity 1 0 power factor display may have or sign indicat ing that power factor is just slightly leading or lagging Once the motor has synchronized the SPM displays power factor line current field volts if optioned field current if optioned and field ohms if optioned 7 2 2 SPM MESSAGES The SPM has a number of built in messages that may appear during normal operation or if an error is detected Errors may occur because the CPU detects a problem internal to the SPM These messages are explained in detail below e FIELD IS APPLIED This message appears when the SPM has closed the field contactor It is displayed briefly and is a normal SPM function PWR FACTOR TRIP The motor has been operating below the power factor setpoint too long causing a trip e CHECK EXCITER The field voltage is below the minimum entered the field undervoltage setpoint The exciter should be checked to determine that it is functioning properly Also the setpoint should be exam ined to see if it is set too high for the normal exciter output e FIEL
69. e any setpoints can be written via Modbus The password is initially the same as the default password but the two passwords are stored separately so the keyboard can not be used to change the communications password and vice versa 2 The allowable range of FLA is as follows the minimum full load amps value is 2 5 times the CT ratio the maximum is equal to the CT ratio 3 The locked rotor current is range dependent on the FLA setpoint the minimum is twice the full load amps and the maximum value is 12 times the FLA 4 REGULATOR OUTPUT must be greater than or equal to FLOOR VOLTS likewise FLOOR VOLTS must be less than or equal to REGULATOR OUTPUT 9 6 SPM Synchronous Motor Protection and Control GE Multilin 9 MODBUS COMMUNICATIONS 9 2 MEMORY MAPPING 9 2 2 FORMAT CODES Table 9 3 MEMORY MAP FORMAT CODES Sheet 1 of 2 ENUMERATION WARE 1decS16 Signed integer with 1 decimal place i e 10 times the real value 1decU16 Unsigned integer with 1 decimal place i e 10 times the real value 20 516 Signed integer with 2 decimal places i e 100 times the real value 2decU16 Unsigned integer with 2 decimal places i e 100 times the real value Alpha An alphabetic letter 1 N 2 p 7 300 baud 600 baud 1200 baud 2400 baud 4800 baud 9600 baud 19200 baud 38400 baud 57600 baud 115200 baud Disable Enable 60 Hz 50 Hz Off Starting n2
70. e centre or the factory Repairs or replacement under warranty will be made without charge Warranty shall not apply to any relay which has been subject to mis use negligence accident incorrect installation or use not in accor dance with instructions nor any unit that has been altered outside a GE Multilin authorized factory outlet GE Multilin is not liable for special indirect or consequential damages or for loss of profit or for expenses sustained as a result of a relay mal function incorrect application or adjustment For complete text of Warranty including limitations and disclaimers refer to GE Multilin Standard Conditions of Sale GE Multilin SPM Synchronous Motor Protection and Control B 1 B 1 WARRANTY APPENDIX B B 2 SPM Synchronous Motor Protection and Control GE Multilin INDEX EXTERNAL VOLTAGE PF 2 7 A AC CT PRIMARY RATING 54 F ACCESSORIES 22 04001 01 1 3 ALTERNATE MENU 4 44 FIELD AND EXCITER VOLTAGE INPUTS 2 6 AMORTISSEUR WINDINGS oien 3 1 FIELD APPLICATION RELAY 5 3 ANGULAR DISPLACEMENT OF ROTOR 3 3 FIELD CONTACTOR AUXILIARY RELAY DELAY 5 3 FIELD CURRENT CALIBRATION MODULE 8 3 FIELD DISCHARGE 2 24 3 4 B FIELD LOSS TRIP COUNTER
71. e for viewers download page This site provides access to the following customer services e Digital Products Directory e Instruction Manuals A brief description of products can be viewed online Manuals for many products are now available online e Product Catalog GE Product Software Individual product brochures can be downloaded and The latest working versions of product software inted dus e Technical Drawings Product Selector Guide Many technical drawings are available in either A graphical tool for finding the product you are inter AutoCAD CorelDRAW or PDF formats ested in Order Codes Sales Offices Order codes for many products can be downloaded A complete listing of world wide sales offices and printed e Technical Support e Technical Publications Complete contact information is available Papers related to power management Much more is also available Visit us online at www GEmultilin com SPM Synchronous Motor Protection and Control GE Multilin
72. e of 115 V AC or 230 VAC Terminal points and have been added to accommodate the separate PF reference voltage 2 3 11 EXTERNAL VOLTAGE PF REFERENCE When terminal points and are used to accommodate a separate PF reference voltage as described above a standard protective function will alert the user should this external voltage drop below the acceptable limits for the SPM power supply This protection will not allow the motor to start while the external voltage is missing but the SPM will not require a reset before the motor can be restarted If the external refer ence voltage is lost while the motor is running the SPM will trip the motor and will require a reset before the motor can be restarted MISSING VOLTAGE will be displayed until reset JOSINOO LX 338 WNOlLdO gt STABILIZED VOLTAGE 115 VAC TRANSFORMER 230 VAC 30VA Min STABILIZED UNSTABILIZED INPUT VOLTAGE MOTOR PHASES A AND B 701768A1 DWG Figure 2 5 REFERENCE VOLTAGE INPUT CONNECTIONS GE Multilin SPM Synchronous Motor Protection and Control 2 7 2 3 ELECTRICAL INSTALLATION 2 INSTALLATION 2 3 12 RS485 COMMUNICATIONS PORT One two wire RS485 port is provided Up to 32 SPMs can be daisy chained together on a communication channel without exceeding the driver capability For larger systems additional serial channels must be added It is also possible
73. e programmed here is the exact output voltage from the SPM For example if the floor is programmed at 1 5 the SPM will output 1 5 volts minimum MOTOR TYPE Collector Ring NOTE This value must be less than or equal to the REG OUTPUT setpoint APPLICATION Certain conditions of operation require a floor so that the motor power factor will not become unstable if the field cur rent is drastically reduced 5 3 6 FLOOR VOLTS When the floor overrides the regulator the power factor moves in a more leading condition than the regulator setpoint As the load and or system force the motor power factor toward the lagging condition such that the power factor falls below the regulator setpoint the regulator will once again take control and boost the field above the floor so that the power factor will not dip below the setpoint The power factor regulator must be tuned during initial start up See section 6 6 for regulator tune up instructions GE Multilin SPM Synchronous Motor Protection and Control 5 11 5 4 CONFIGURATIONS MENU 5 SETPOINTS 5 4 1 MOTOR TYPE MOTOR Collr Ring Range Collr Ring Brushless ENTER to modify FUNCTION The type of motor is selected here Different setpoints are used for the two different motors and operation of the relay is altered This configuration setpoint must be entered correctly 5 4 2 LINE FREQUENCY LINE FREQ 60 Hz Range 50 Hz 60 Hz ENTER to modify FUNCTION Enter line frequency here for
74. eck PF reading Table 10 2 COLLECTOR RING MOTOR PF TEST RESULTS EXPECTED PF ACTUAL PF 1 GE Multilin SPM Synchronous Motor Protection and Control 10 3 10 4 COLLECTOR RING MOTOR POWER FACTOR TRIP TEST 10 FUNCTIONAL TESTS 10 4 1 SETUP 1 Connect as for Collector Ring Power Factor Test in the previous section 2 Connect timer to TRIP relay 10 4 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 except for following exceptions e MOTOR Collector Ring b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 4 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close 2 Turn on current source and function generator Open MX switch FAR contact should close followed by FCX contact FIELD IS APPLIED message should momentarily flash on screen PF metered value will now be displayed along with other metered values Vary voltage angle as in table below and check PF reading Table 10 3 COLLECTOR RING MOTOR PF TRIP TEST RESULTS SETPOINTS INPUT EXPECTED RESULTS PF TRIP PF DELAY ANGLE EXPECTED PF TRIP TIME 10 4 SPM Synchronous Motor Protection and Control GE Multilin 10 FUNCTIONAL TESTS 10 5 BRUSHLESS MOTOR FIELD APPLICATION TEST 10 5 1 SETUP 1 Connect the Va and Vb terminals of the 3 ph
75. eger SPM Synchronous Motor Protection and Control GE Multilin 10 FUNCTIONAL TESTS 10 1 INTRODUCTION 10 1 1 DESCRIPTION The purpose of this section is to demonstrate the procedures necessary to perform a complete functional test of all the SPM hardware while also testing firmware hardware interaction in the process Since the SPM is packaged in a drawout case a demo case metal carry case in which an SPM may be mounted may be useful for creating a portable test set with a wiring harness for all of the I O Testing of the relay during commissioning using a primary injection test set will ensure that CTs and wiring are correct and complete 17 Cycle power to SPM to clear lockout times that occur during testing After testing is complete it is a good idea to zero all statistics NOTE The following equipment is recommended to test the SPM s functionality and calibration 3 phase variable ac test set voltage and current 0 to 15 V DC voltage source needed to test Exciter Field volts or current inputs Function generator needed to test collector ring field application Timer Multimeters Switch oa amp ON gt GE Multilin SPM Synchronous Motor Protection and Control 10 1 10 2 COLLECTOR RING MOTOR FIELD APPLICATION TEST 10 FUNCTIONAL TESTS 10 2 1 SETUP 1 Connect the Va and Vb terminals of the 3 phase tester to SPM terminals B9 and B10 control power and PF voltage reference respectively Program for 120 V AC
76. ent 701762A5 CDR Figure 3 15 BRUSHLESS STALL ACCELERATION CHARACTERISTIC 3 18 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 3 BRUSHLESS CONTROLLER 3 3 4 STALL PROTECTION Stall protection is derived from stator current inputs from two lines feeding the motor The protection character istic is shown in Figure 3 15 BRUSHLESS STALL ACCELERATION CHARACTERISTIC on page 3 18 After the motor synchronizes the SPM monitors motor cool down approximately every 20 minutes rate to provide protection against motor abuse from too frequent starting The SPM will indicate on the display the required wait time period that must be allowed before attempting a restart on a motor that has been shutdown from a stall protective operation or one in which two or more rapidly successive start stop operations have been per formed 3 3 5 POWER FACTOR PULL OUT PROTECTION The power factor protection for brushless control operates as power factor protection for collector ring motors described in Section 3 2 6 However current 3 is derived internally to the SPM by algebraically summing cur rents at the and 2 inputs It is important to connect current inputs for and as shown in Figure 8 for brushless machines NOTE Only the ride through mode is available for brushless machines If an attempt to resynchronize is desirable set the PF trip delay parameter for one or two seconds If the motor slips a po
77. es Move mouse pointer view the desired graphs Zoom In Zoom Out over the cursor line Hold the left mouse button and drag the Cursor Line to the new location Press the Setup button to enter the Graph Attribute window Program the Graphs to be displayed by selecting the pull down menu beside each Graph Description Change the Color Style Width Group and Spline selection as desired Select the same Group for all parameters to be scaled together Select Save to store these Graph Attributes and OK to close this window Use the pull down menu to select the Sample Rate click the checkboxes of the Graphs to be displayed and select RUN to begin the trending sampling The Trending File Setup button can be used to write the graph data to a file in a standard spreadsheet format Ensure that the Write Trended Data to File box is checked and that the Sample Rate is at a min imum of 5 seconds Set the file capacity limit to the amount of memory available for trended data GE Multilin SPM Synchronous Motor Protection and Control 4 9 4 2 KEYPAD INTERFACE 4 USER INTERFACE 4 2 1 DESCRIPTION The SPM is a user programmable device with a wide range of setpoints configurations and calibration values that enable operation with a wide variety of ring type and brushless synchronous motors This section deals with programming the SPM for a ring type motor The setpoints will be explained and a practical example will be given The example
78. es the SPM into resync mode These modes are described in the next section ah ug Sequence PHASE TO NEUTRAL Ve VOLTAGES 12s V 21 V V21 l3 PHASE 3 CURRENT V3 l4 is same 3 l4 LAGS V l4 LEADS V phase as V4 3 3 A 90 Lead Figure 3 10 POWER FACTOR SENSING EXAMPLE GE Multilin SPM Synchronous Motor Protection and Control 3 11 3 2 COLLECTOR RING MOTORS 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 7 CONTROLLER ACTION DURING PULL OUT If excessive mechanical load is applied to the motor shaft during normal running of the motor in synchronism the resulting lagging power factor and or line current surge will be detected by the SPM Two forms of pull out protection are available They are as follows a RESYNC MODE Resync mode operation causes the Field Application Relay FAR to remove the motor field excitation Action will occur from either lagging power factor below the programmed setpoint or a line current surge above approximately four times motor full load current Relay FCX drops out at the same time as FAR Load is removed if an automatic loader is connected The motor will continue to run with field removed for the programmed power factor delay time and if resyn chronization does not occur within this time the TRIP relay will operate and the motor will stop The display will indicate FAIL TO RESYNC b RIDE THRU MODE If the alternate ride th
79. eur windings are built into the rotor pole tips to provide acceleration and damping torque during starting and normal operation During start the motor accelerates to near synchro nous speed When the rotor is close enough to synchronous speed for the field poles to pull the rotor into syn chronism DC is applied to the main field and the rotor pulls into step normally operating at a power factor equal to or more leading than unity The brushless motor has as its name implies no brushes or slip rings Instead it contains a rotating exciter with stator mounted DC windings and the armature winding on the rotor A rotor mounted solid state rectifier converts the AC from the exciter to DC for the main field poles The silicon controlled rectifiers SCRs and control circuitry are rotor mounted along with the field discharge resistor to control the application of DC to the main field at proper rotor speed and angle The schematic below shows that the actual field control is provided with the motor and is not part of the motor controller Motor Rotor Exciter Rotor Slip Armature and Angle Sensing e Grcuit I le Motor Exciter Field Motor Motor Exciter Rectifier Controller Iz Stator mcn Assembly E EE L Exciter Field Adjust T MERI Figure 3 14 ROTATING RECTIFIER EXCITE
80. field windings The resistance of an RTD is temperature dependent it increases as the temperature increases In this case the RTD behavior is emulated by examining the field voltage and current As the ratio of field voltage to field current increases the field resistance increases indicating an increase in temperature of the field windings The motor nameplate contains the motor s maximum temperature rise and field resistance This information is used with the multiplier from the table below to determine the maximum field ohms and therefore the maxi mum field winding temperature at which the motor should be allowed to operate Table 5 3 FIELD OHMS MULTIPLIER RISE c MULTIPLIER RISE C MULTIPLIER RISE C MULTIPLIER 0 1 0 40 115 110 142 5 1 02 50 1 19 120 146 10 1 04 60 123 130 1 50 15 1 06 70 127 140 1 54 20 1 08 80 1 31 150 1 57 25 1 10 90 1 35 160 1 60 30 142 100 1 39 170 1 64 EXAMPLE A motor with a nameplate field resistance of 2 at 25 C with insulated copper windings has a maximum tem perature rise of 80 C This corresponds to a field resistance of 1 31 times the resistance at 25 C So the FIELD OHMS setpoint is set to 1 31 x 2 Q 2 62 GE Multilin SPM Synchronous Motor Protection and Control 5 7 5 2 SETPOINTS MENU 5 SETPOINTS 5 2 15 FIELD UNDERCURRENT FIELD AMPS OFF Collector Ring Range OFF 0 1 to 1000 ENTER to modify
81. gh to override the regula NOTE tor and avoid the instability while allowing the PF to move near zero lead power factor GE Multilin SPM Synchronous Motor Protection and Control 7 5 7 4 TROUBLESHOOTING 7 TESTING AND TROUBLESHOOTING 7 4 1 TROUBLESHOOTING GUIDE Table 7 1 SPM TROUBLESHOOTING Sheet 1 of 2 SYMPTOM The SPM READY message is not displayed at power up motor not running Motor starts but will not synchronize FC does not close POSSIBLE CAUSE Control voltage missing CORRECTIVE ACTION Check control fuses in synchronous controller on primary and secondary of control power secondary Connection plug is missing Insert connection plug at bottom of cradle assembly see Figure Drawout cradle not fully engaged Check removable cradle assembly and confirm that the top and bottom rotating latches engage cradle and are positioned to engage connection to disconnecting sockets at rear of case Wrong voltage is applied to the V4 and V3 terminals Control voltage must be in the range of 85 to 265 V AC Display is frozen Drop control power momentarily to the SPM and reapply Some portion of the display should be actively blinking If not the CPU is not functioning Replace with a new SPM Missing or improper motor on motor off input to SPM Add or correct the isolated normally closed interlock from the main contactor or relay operated with the main contactor Interlock is
82. he changes SAVE CHANGES ENTER to save 10 Upon pressing the key to save the setpoint changes or the GE key not wanting to save setpoint changes the display returns to the PROGRAMMING MODE menu Press the GE key once to go into TEST MODE and a second time to return to the SPM READY display 4 12 SPM Synchronous Motor Protection and Control GE Multilin 4 USER INTERFACE 4 2 KEYPAD INTERFACE 4 2 4 CHANGING CONFIGURATIONS To change the SPM configuration the user must enter the PROGRAMMING MODE This can be accomplished with the motor either off or in the running mode To enter the PROGRAMMING MODE the following procedure must be used 1 With the display indicating the following press the GE key items in bold italics indicate that they should be blinking on the screen Collr Ring Motor SPM READY 2 The display should now indicate that the unit is in STAT MODE STAT MODE SCROLL for menus 3 Press the GE key The display should now indicate that the unit is in PROGRAMMING MODE PROGRAMMING MODE SCROLL PASSWORD 4 Use the amp z Zx keys to change the password and press Enter to enter the password PASSWORD 0000 ENTER to verify 5 The display should now indicate the CONFIGURATIONS menu or the CALIBRATION menu depending upon which scroll key was pressed Use the szj Zx keys to select the CONFIGURATIONS menu CONFIGURATIONS ENTER for menus 6 Press the Enter key to enter the setpoints menu Once i
83. he setpoint and then press the key to continue If you choose not to change this setpoint once it has been selected pressing the GE key deselects the setpoint PF TRIP 0 80 SCROLL to change 9 Additional setpoints can be changed using the above procedure When all setpoint changes have been accomplished press the GE key This will return the display to the SETPOINTS main menu Press the GE key again and the display will ask to verify that changes should be save Press Enter to save the setpoints otherwise press the GE key if you do not want to save the changes SAVE CHANGES ENTER to save 10 Upon pressing Enter to save the setpoint changes or the GE key not wanting to save setpoint changes the display returns to the PROGRAMMING MODE menu Press the GE key once to go into TEST MODE and a second time to return to the SPM READY display GE Multilin SPM Synchronous Motor Protection and Control 4 11 4 2 KEYPAD INTERFACE 4 USER INTERFACE 4 2 3 CHANGING CALIBRATION VALUES To change the calibration values on the SPM the user must enter the PROGRAMMING MODE This can be accomplished only when the SPM is off To enter the PROGRAMMING MODE use the following procedure 1 With the display indicating the following press the GE key items in bold italics indicate that they should be blinking on the screen Collr Ring Motor SPM READY 2 The display should now indicate that the unit is in STAT MODE STAT MODE SCROLL for men
84. ications this mode is preferred when SPMPC is being used without an attatched SPM Set Control Type to match the type of RS232 RS485 converter If connected through a GE Power Management F485 converter unit select MULTILIN 232 485 CONVERTOR If connected through a modem select Modem If a third party RS232 RS485 converter is being used select the appropriate control type from the available list based upon the manufacturer s specifications Set Parity to match the PARITY setpoint Set Baud Rate to match the BAUD RATE setpoint Set Communication Port to the COM port on your local PC where the SPM is connected e g COM1 or 2 On most PCs COMI is used by the mouse device leaving COM2 available for communications Set Slave Address to match the SLAVE ADDRESS setpoint programmed in the SPM Figure 4 2 COMMUNICATION COMPUTER WINDOW 4 To begin communications click the ON button in the Communication section of the dialog box above The Status section indicates the communication status If communication is successfully established the mes sage Program is now talking to a Multilin device is displayed As well the status at the bottom right hand corner of the screen indicates Communicating GE Multilin SPM Synchronous Motor Protection and Control 4 3 4 1 SPMPC SOFTWARE 4 USER INTERFACE 4 1 4 CREATING A NEW SETPOINT FILE Creating a new SPM setpoint file is accomplished as follow
85. ick OK File name Folders c gepm spmpc motor spm motor2 spm remotel spm Cancel Help Network List files of type Drives SPM Setpoint Files X c teasdals Select the File Send Setpoints to Relay menu item SPMPC will prompt to confirm or cancel the setpoint file transfer Click Yes to download the setpoints to the SPM or click No to cancel SPM Synchronous Motor Protection and Control GE Multilin 4 USER INTERFACE 4 1 SPMPC SOFTWARE 4 1 7 UPGRADING SETPOINT FILES TO A NEW REVISION It may be necessary to upgrade the revision code for a previously saved setpoint file when the SPM firmware is upgraded 1 To upgrade the revision of a previously saved setpoint file run SPMPC and establish communications with the SPM through the RS485 connector 2 Select the Actual Values gt Product Information menu item and record the Main Software number of the re lay s firmware e g 201 Actual Values Product Information x PRODUCT INFORMATION Product Code SPM Hardware A Main Software Revision 201 Modification No o 3 Next select the File gt Open menu item and enter the location and filename of the setpoint File to be downloaded to the connected relay When the file is open SPMPC will be in Editing File mode and Not communicating 4 Select the File gt Properties menu item and note the version code of the setpoint file If the Main
86. ied will create intense pulsations in torque at the motor shaft each time a stator pole passes a rotor pole Corresponding pulsations occur in line current Both types of pulsations can be damaging Torque pulsations can break a shaft coupling or other mechanical elements and current pulsa tions can interfere with smooth power system operation Slipping poles with field applied is always unaccept able for a synchronous motor therefore some means must be provided to prevent this condition from occurring One of the most reliable indicators of synchronous and asynchronous out of step operation is the motor power factor Power factor is related to the phase angle between voltage and current Synchronous motors sel dom if ever operate continuously at lagging power factor Synchronous motors run at either unity or some value of leading power factor Lagging power factor appears when the motor load angle increases beyond rated becoming almost fully lagging 90 as the motor slips out of step Therefore lagging power factor can be utilized to initiate action to prevent slipping Torque and power pulsations during slip can be reduced by removing field current to the rotor poles The motor will then run essentially as an induction motor on its amortisseur winding Slip with the field current removed is tolerable to the load and power system but intolerable for any length of time to the motor amortisseur winding itself since the winding is designed wi
87. igure 3 8 AMORTISSEUR WINDING PROTEC NOTE TION on page 3 7 3 8 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 COLLECTOR RING MOTORS N ao A N N E Run Time Zero Speed Stall 0 8 6 Line Voltage 5 50 4 3 65 2 80 1 5 909 100 0 10 20 30 40 50 60 70 80 9 100 Synchronous Speed Figure 3 9 PROTECTION FOR REDUCED VOLTAGE STARTS GE Multilin SPM Synchronous Motor Protection and Control 3 9 3 2 COLLECTOR RING MOTORS 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 5 POWER FACTOR PULL OUT PROTECTION Synchronous motors are designed to run at constant speed and drive shaft loads from torque derived from the magnetic poles on their rotors magnetically linking opposite stator poles Whenever the rotor turns at a speed less than that of stator rotating field the motor is said to be slipping poles Slip can occur with the field poles magnetized while running in synchronism from the following four major causes 1 A gradual increase in load beyond the pull out capabilities of the motor 2 A slow decrease in field current 3 sudden large impact load 4 A system fault or voltage dip lasting long enough to cause pull out Loss of synchronism with field appl
88. ing actual motor parameters which comprise stator current Power factor e DC field current DC field voltage DC field resistance Running time meter RTM Statistical data includes number and type of trips The SPM performs a complete system check prior to starting the motor Stator Protection 469 CLUTCH COUPLING ANS DEVICE NUMBERS 26F Feld overtem perature 27 Undervoltage 37 Undercurrent or underpower 48 Incomplete sequence 50 Instantaneous overcurrent 55 Power factor 56 Feld application 86 Lockout 94 Tipping 95 Reluctance torque sync resync 96 Autoloading relay 701767A9 CDR Figure 1 1 SINGLE LINE DIAGRAM 1 2 SPM Synchronous Motor Protection and Control GE Multilin 1 INTRODUCTION 1 2 ORDERING 1 2 1 ORDER CODES The SPM has all features built into the standard relay and programmable by the user to fit the specific applica tion The only option in the order code is for Power Factor Regulation Some of the standard features require an optional external hardware package that must be ordered in addition to the relay itself These separate packages are explained in the following section Base Unit SPM Configuration 0 Standard starting and protection relay with VDN board PF Power Factor regulation option Used on motors with SCR exciter not recommended for brushless applications Harsh Environment 0 Standard meter Harsh chemical environment co
89. int The SPM checks the exciter volt age before allowing the motor to start and will not allow a start if the voltage is not present but will not require a reset once voltage is reestablished The SPM displays CHECK EXCITER and initiates a trip anytime the motor is running and the field voltage is below this setpoint In this case a reset is required The exciter output must be hooked up to the SPM via the included VDN module See installation for more details MOTOR TYPE Collector Ring or Brushless APPLICATION This function is supplied for equipment that has exciters energized prior to starting the motor If the exciter is designed to be energized with motor starting as with shaft connected rotating exciters use the field current loss feature instead or a separate voltage relay for voltage check protection 5 8 SPM Synchronous Motor Protection and Control GE Multilin 5 SETPOINTS 5 2 SETPOINTS MENU 5 2 18 FIELD UNDERVOLTAGE DELAY EX VLT DLY 0 3 s Range 0 3 to 5 0 seconds ENTER to modify Step 0 1 second FUNCTION The exciter voltage delay setpoint is the time delay that will elapse after the exciter voltage falls below the pro grammed setpoint before the SPM initiates tripping action for field undervoltage CHECK EXCITER MOTOR TYPE Collector Ring or Brushless NOTE The EXCITER VOLTS option must be enable before this feature can be used 5 2 19 INCOMPLETE SEQUENCE DELAY INC SEQDLY OFF Collector Ring Range 1 to 100
90. ions Cancel SYSTEM CONFIGURATION store Motor Brushless Help Print Screen Line Frequency Power Factor Reference Internal RS485 Min Turnaround Time Statistics Mode Read write Lo 2 For setpoints requiring numerical values e g RS485 Min Turnaround Time change the value by clicking the up down arrows at the right side of the box Alternately you may click the mouse pointer anywhere inside the setpoint value box to display a numerical keypad showing the OLD value RANGE and INCRE MENT of the setpoint value being modified Enter RS485 Min Turnaround Time Value Old Value 5 ms Range 0 1000 Enter the new value by clicking the numerical keys Increment 1 Click Accept to exit the keypad and keep the new value Click Cancel to exit the keypad and keep the old value 3 For setpoints requiring non numerical values e g Motor Type clicking anywhere inside the setpoint box causes a selection menu to be displayed Brushless M Brushless Ring type Multilin SPM Synchronous Motor Protection and Control 4 5 4 1 SPMPC SOFTWARE 4 USER INTERFACE 4 1 6 LOADING SETPOINTS FROM A FILE Loading the SPM with setpoints from a file is accomplished as follows 1 Select the File gt Open menu item 2 SPMPC launches the Open window listing all filenames in the SPM default directory with the extension SPM Select the file to download and cl
91. is error e ROM FAILURE A PROM checksum error occurred during self test Consult GE Multilin to correct this prob lem NOVRAM FAILURE After the SPM writes data to its non volatile memory 2 the CPU immediately reads back the last value and compares it to what should have been written If the two values are not equal the SPM displays this message This generally indicates a problem with the CPU Board The SPM should be replaced FAILURE A RAM checksum error occurred during self test This error is sometimes cleared by cycling power through the unit Otherwise consult GE Multilin e FPGA FAILURE The Field Programmable Gate Array has failed to configure during self test Power can be cycled to the unit in an attempt to clear this error Otherwise consult the GE Multilin CHECK MX amp TRP CIRCUIT The motor is in a tripped state Either the MX contacts are still open and the TRIP relay is de energized or the TRIP relay is energized but the internal circuitry to sense this has failed or TRP FAILURE The MX circuit or the TRIP relay circuit has failed e COMM CARD FAILURE The communications card has failed or was not present during power up or SYSTEM TEST A periodic display of this error occurs only if a communication card test was passed during power up and subsequently fails during normal operation Only for units with the communications option CKT FAILURE The watchdog timer circuit h
92. is is the approach that is taken with the PF display for the SPM When the motor generator is producing reactive kVA the sign of the power factor is displayed plus indicating leading power factor regardless of the operating mode When it is consuming reactive kVA the power factor is negative Therefore whether the machine is motoring or generating pull out protection is provided by limiting the degree of lagging power factor under excitation as detected by the SPM The power factor regulation option also performs to force the field in advance of a pull out condition regardless of whether the machine is operating as a motor or a generator GE Multilin SPM Synchronous Motor Protection and Control 3 15 3 2 COLLECTOR RING MOTORS 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 10 POWER FACTOR REGULATION Power factor regulation is useful in those applications where motors are subjected to high level transient impact loads such as chipper drives The PF regulator senses the power factor dip that occurs when the motor is loaded and causes the SCR Exciter to respond with a boosted output As a result the pull out torque of the synchronous motor is increased for the duration of the transient load After the load subsides the regula tor senses an excessive leading power factor and causes the SCR to reduce its output This automatic boost ing of field current to avoid pull out is called field forcing The Power Factor regulator thus provides au
93. isorientation of the reluctance torque rotor magnetization PRA flag is set when VDIS falls within the range of 40V At this point PRS starts timing When PRS times out the PRS flag is set PRA and PRS flags now appear simultaneously the field is applied Figure 3 7 RELUCTANCE TORQUE MOTOR MAGNETIZATION 3 6 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 COLLECTOR RING MOTORS 3 2 3 STARTING PROTECTION The amortisseur or cage winding of a synchronous motor is probably the element most susceptible to thermal damage Its function is essentially operative only during starting and there are limitations on space available for its construction onto the rotor Hence it is usually made of lighter material than the cage winding of an induction motor The cage is also vulnerable to overheating should the motor be allowed to run out of synchro nism with no excitation In this case it runs as an induction motor at some value of slip which will produce cage current that develops running torque However the cage of a synchronous motor is not designed for continu ous operation Therefore an important protective function of the controller is to prevent overheating of the cage winding both during starting and running out of synchronism Monitoring the starting condition of a synchronous motor can be accomplished by looking at the frequency of induced field current the same procedure used to accomplish
94. istance in ohms Ww must fall between 200 and 1000 V at both zero and 95 speed For this example NOTE 21 Q x30 A 630 V zero speed check 21 x 17 A 357 V 95 speed check The criterion is thus met for this example If induced field voltage is greater than 1000 volts contact the factory Table 7 2 PROGRAMMING EXAMPLE Sheet 1 of 4 KEYPRESS DISPLAY COMMENTS Coll Ring Motor SPM READY STAT MODE SCROLL for menus In PROGRAMMING MODE t ter th PROGRAMMING MODE n PROG G MO must now enter the password SCROLL passwords Ready mode display Enter STAT mode on the way to PROGRAMMING MODE Use SCROLL keys to enter password and then press ENTER to PASSWORD 0000 verify the password ENTER to verify First menu after password entry is CONFIGURATIONS menu must scroll past it to get to SETPOINTS menu CONFIGURATIONS ENTER for menus Press SELECT ENTER key to enter setpoint menus SETPOINTS ENTER for menus First setpoint is PF TRIP SCROLL Key s to select value of 0 85 PF TRIP 0 80 and then SELECT ENTER key to accept new value ENTER to modify Change existing value of PF TRIP to new 0 85 value PF TRIP 0 85 9 ENTER to modify 7 8 SPM Synchronous Motor Protection and Control GE Multilin 7 TESTING AND TROUBLESHOOTING 7 5 PROGRAMMING Table 7 2 PROGRAMMING EXAMPLE Sheet 2 of 4 KEYPRESS DISPLAY PF DELAY 10 05 ENTER to modify COMMENTS Select the setpoint Use the
95. l be 90 behind gp Very significantly then the point of maximum induced flux occurs as the induced field current p passes through zero from negative to positive maximum rate of change of cur rent See the figure below 45 135 90 45 0 315 270 225 180 135 Electrical Degrees Rotor Angle 14 2 2 Figure 3 2 TYPICAL TRANSFORMER ROTOR FLUX AND CURRENT CONSTANT SLIP The rotor angle at which 4 1 2 go through zero depends upon the reactance to resistance ratio in the field circuit A very high value of reactance to resistance shifts the angle toward 90 Reactance is high at low speed high frequency At high speed low slip low frequency reactance decreases and the angle shifts toward 0 if the circuit includes a high value of resistance As the stator goes beyond 45 the torque increases due to increased stator flux At this point yields a convenient indicator of maximum flux and increasing torque from which excitation is applied for maximum effectiveness If the field discharge loop is opened at the point of maximum flux this flux is trapped Applying external exci tation in correct polarity to increase this trapped flux at this instant makes maximum use of its existence At this point the stator pole has just moved by and is in position to pull the rotor forward into synchronous alignment See the figure below 45 Pull in Electrical 360 Degrees 135 90 45 0
96. le in this condition the rotor mounted control device will remove the field instantaneously When and if the motor recovers from the disturbance the main field will be applied If it does not recover within the PF trip time delay the motor will trip If no attempt to resync is desirable set the PF trip time delay parameter to 0 1 second This time will be too short for the power factor to recover following a slipped pole condition and the motor will trip on lagging power factor 3 3 6 POWER FACTOR REGULATION Power factor regulation is not recommended on brushless machines due to instability problems arising from the long time constant of the rotating exciter field GE Multilin SPM Synchronous Motor Protection and Control 3 19 3 3 BRUSHLESS CONTROLLER 3 SYNCHRONOUS MOTOR APPLICATIONS 3 20 SPM Synchronous Motor Protection and Control GE Multilin 4 USER INTERFACE 4 1 SPMPC SOFTWARE 4 1 1 DESCRIPTION This chapter provides all the necessary information to install and or upgrade a previous installation of the SPMPC software and write edit setpoint files iy The SPMPC software is only compatible with firmware versions 200 and higher NOTE The following sections are included in this chapter e System requirements SPMPC software version for previous installation check SPMPC software installation upgrade procedure SPMPC software system configuration Creating Editing Upgrading Downloading Setpoint Files
97. ll appear containing the SPMPC icon 4 2 SPM Synchronous Motor Protection and Control GE Multilin 4 USER INTERFACE 4 1 SPMPC SOFTWARE 4 1 3 CONFIGURATION 1 Connect the computer running the SPMPC program to the relay via the RS485 port and start the SPMPC software 2 SPMPC will not automatically communicate with the relay unless that function is enabled see startup mode below The screen will display the SPM firmware revision if communications is established 3 To setup communications select the Communication gt Computer menu item COMMUNICATION COMPUTER COMPUTER SETTINGS y Slave Address Cancel Communication Port 8 COM2 Store ES Print Screen Baud Rate 9600 Le Lo EN gt Parity m gt Control Type MULTILIN 232 485 CONVERTOR gt gt Startup Mode File mode default settings Defaults COMMUNICATION CONTROL COMMUNICATION OPTIMIZATION Status SPMPC is not talking to a SPM SPMPC is now in Maximum time to wait setpoint editor mode for a response Maximum attempts 5s Communication ON OFF Locate Device before comm failure __ Set the Startup Mode based upon user preference In the Communicate with Relay mode SPMPC will attempt to establish communications immediately upon startup While in the File mode w default settings SPMPC waits for the user to click the ON button before attempting commun
98. load masses cannot be accelerated fast enough to allow synchronization if slip is in excess of ten percent Synchronous motor controllers which can accurately apply field at an optimum speed and a favorable angle permit matching the motor to the load with a greater degree of precision than might otherwise be possible The increase in load which can be pulled in due to precision application of field will vary from one motor design to another along with system inertia Applying excitation at the point of zero induced current favorable angle takes advantage of motor capability in two ways 1 It catches traps salient pole flux at significant magnitude provided there is a field discharge resistor of adequate value and uses it for torque during a 180 acceleration period 2 It catches the rotor in correct angular position to be pulled forward into step In addition to permitting closer matching of motor to load optimum application of excitation also reduces power system disturbance which occurs when the motor goes through a complete slip cycle with the field energized If the motor is large relative to the power system surges transmitted to the system will be at a minimum if field is applied to prevent slip at pull in 3 4 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 COLLECTOR RING MOTORS 3 2 1 STARTING AND SYNCHRONIZING Control functions for starting the synchronous motor include
99. may be followed step by step by the operator as a guide to program the SPM for their motor GE Key This key is used to enter or exit the different modes of the SPM STAT MODE PROGRAMMING MODE and TEST MODE It is also used to cancel an operation such as changing a setpoint SCROLL Keys These keys are used to scroll through the various menus setpoints configuration param eters etc When the motor is in running mode pressing either of these keys will halt the display from scroll ing They can then be used to step through the displayed values one at a time Pressing and holding this key will resume the automatic scrolling of the display When changing a setpoint or other parameter pressing and holding either of the SCROLL keys down will put the values being changed into a decade incremental scroll Thus changing a setpoint from 1 to 1000 the value would start to increment by the decade value 10 100 or 1000 after every decade after reach ing 10 it increments by 10 after reaching 100 it increments by 100 ENTER Key This key is used to make a selection or acts as an enter key as prompted by the menu on the display This key must be pressed when setpoints configuration parameters or calibration values are selected to be changed It must also be pressed to save such changes The SPM has a smart parameter menu for setpoints that does not allow the user to enter values outside of the valid range and automatically checks for setpoi
100. me GEPowerManagement Online Store AboutUs Feedback k Order Your Next xj Relay Online ndi a es Today 3 Management Online Store Products Index By Product Name Media PressReleases Index By Function Advertisements v INFO PLAYER Software Articles 1 Ordering Offices ContactUs Feedback Comments e 37 i F Online Store Contact Information z 2 vy QUICK SEARCH Support Subscriptions AboutUs Related Links rd Support Documents Technical Publications v HIGHLIGHTS OF THE MONTH System Solutions See the solutions we can provide you with p F35 Multiple Foeder Management Relay GE Power Management Privacy Policy Terms and Conditions 1997 1998 1999 General Electric Company Last Updated March 13 2000 Click here for viewers download page Figure 4 1 GE MULTILIN WELCOME SCREEN 3 Click the Index by Product Name item from the main page and select SPM Synchronous Motor Protec tion and Control from the product list to open the SPM product page Click the Software item from the Product Resources list to bring you to the SPM software page The latest version of the SPMPC software will be shown Click on the SPMPC Program item to download the installation program to your local PC Run the installation program and follow the prompts to install to the desired directory When complete a new GE Multilin group window wi
101. med locked rotor current Solution program LR AMPS with maximum current value seen during a start SPM measures the field ohms to be beyond range of DCCT Solution Turn the HIGH FIELD setpoint OFF and check calibration of DCCT and CM 4 What is the cause of an incomplete sequence trip and how do correct it An incomplete sequence trip is issued if the motor fails to synchronize in a set amount of time Check the fol lowing points e Has the INC SEQ DLY been set long enough to allow the motor to start e Check the wiring Is it properly connected across the field discharge resistor ring type motors e Has the SYNC SLIP setting been set to the correct level ring type motors Measure the frequency at the terminals and ensure it falls below the programmed slip level If not check wiring grounding and the motor 5 What is the SPM internal CT burden The CT burden is 16 mQ or 0 4 VA at 1 x CT 6 Whatis the power consumption to the SPM The SPM draws 10 VA nominal at 120 V AC GE Multilin SPM Synchronous Motor Protection and Control 7 13 7 7 FREQUENTLY ASKED QUESTIONS 7 TESTING AND TROUBLESHOOTING 7 Why do I get long lockout time if my motor trips or fails to start The lockout time is variable It is calculated to protect the motor from overheating and subsequent break down of the amortisseur winding This heating is caused during motor acceleration If the lockout time is too long it
102. must be less than or equal to REGULATOR OUTPUT 9 2 SPM Synchronous Motor Protection and Control GE Multilin 9 MODBUS COMMUNICATIONS 9 2 MEMORY MAPPING Table 9 2 MODBUS MEMORY MAP Sheet 2 of 5 GROUP ADDR DESCRIPTION RANGE STEP UNITS FORMAT FACTORY hex VALUE CODE DEFAULT POWER 022A Instantaneous Power Factor Pwrfactor N A FACTOR 022B Filtered Power Factor Pwrfactor N A 022C Instantaneous Phase Angle U16 N A 022D Filtered Phase Angle U16 N A 022E Reserved Lo j4 l 0231 Reserved EXCITER 0232 Instantaneous Exciter Current U16 N A CURRENT 0233 Filtered Exciter Current 016 N A 0234 Reserved 0235 Reserved 0236 Reserved EXCITER 0237 Instantaneous Exciter Voltage U16 N A VOLTAGE 0238 Filtered Exciter Voltage 016 N A 0239 Reserved 023A Reserved 023B Reserved FIELD 023C Instantaneous Field Ohms U16 N A ans 023D Filtered Field Ohms U16 N A 023E Reserved 023F Reserved 0240 Reserved INDUCED 0241 Field Voltage Frequency 0 00 to 99 99 2decU16 N A 0242 Percentage Slip 0 0 to 100 0 idecU16 0243 Reserved 0244 Reserved 0245 Reserved OUTPUT 0246 TRIP Relay Status Relaystate N A RELA 0247 FAR Relay Status Relaystate N A 0248 FCX Relay Status Relaystate N A 0249 Reserved 024A Reserved 024B Reserved Range for collector ring motors
103. n built into the SPM to ensure proper and reliable operation in harsh industrial environments Proper grounding of the chassis ground terminal is critical to en sure safety and filtering 2 3 3 FIELD AND EXCITER VOLTAGE INPUTS The field voltage inputs Vg and and exciter voltage inputs Vg and Vg are connected to the relay via the supplied voltage divider network VDN DO NOT ATTEMPT TO START THE MOTOR WITHOUT THE EXTERNAL RESISTOR ASSEMBLY WIRED SEVERE DAMAGE TO THE SPM MAY RESULT IF THE EXTERNAL RESISTOR ASSEM dme BLY IS NOT PROPERLY CONNECTED 2 3 4 RELAY OUTPUTS The following is a description of the relay outputs 1 TRIP Trip Relay This relay is normally energized and drops out on loss of power or when the module senses an abnormal condition 2 FAR Field Application Relay This relay picks up at the proper time to apply DC to the motor field FCX Loading Relay This relay picks up when the motor is fully synchronized and ready to be loaded It is controlled by the FCX Delay programmable setpoint 2 3 5 CURRENT TRANSFORMER INPUT The SPM is designed to work from a five ampere 5 A current transformer CT secondary The current trans former must be connected in the proper motor phase See Figure 2 3 TYPICAL WIRING DIAGRAM on page 2 4 to determine proper phase For brushless applications the SPM requires inputs from two motor phases 2 3 6 POWER FACTOR OUTPUT This output is a 0 to 10 V DC signal tha
104. n the CONFIGURATIONS menu use the A Z keys to move through the different setpoints 7 To change a configuration press the ENTER key as prompted MOTOR Collr Ring SELECT to modify 8 Once the configuration has been selected the value of the setpoint should blink Use the sz zx keys to change the value of the configuration and then press the key to continue If you choose not to change this setpoint once it has been selected pressing the GE key deselects the setpoint MOTOR Collr Ring SCROLL TO CHANGE 9 Additional configurations can be changed using the above procedure When all setpoint changes have been accomplished press the GE Key This will return the display to the CONFIGURATIONS main menu Press the GE key again and the display will ask to verify that changes should be save Press Enter to save the configurations otherwise press the GE key if you do not want to save the changes SAVE CHANGES ENTER to save 10 Upon pressing the key to save the setpoint changes or the GE key not wanting to save setpoint changes the display returns to the PROGRAMMING MODE menu Press the GE key once to go into TEST MODE and a second time to return to the SPM READY display GE Multilin SPM Synchronous Motor Protection and Control 4 13 4 2 KEYPAD INTERFACE 4 USER INTERFACE 4 2 5 VIEWING amp CHANGING STATUS MODE PARAMETERS To view or change the SPM status information the user must enter the STAT MODE
105. nection diagram supplied with the controller inspect the wiring to determine with certainty that the starting and field discharge resistor is connected in the motor field discharge circuit through the discharge closed contact of the field applying contactor FC While inspecting the field contactor manually pick up the contactor and confirm that the normally closed con tactor pole opens after the two normally open poles close It is important that all three poles are closed momentarily overlap during contactor pick up and drop out closed transition contacts To clean the face of the SPM wipe with a damp cloth and mild detergent 7 1 2 SPM TEST CHECKS After the wiring check is complete the equipment may be energized but DO NOT START MOTOR With con trol power on carefully follow the procedures below DO NOT TOUCH ANY CONNECTION POINT AT THE REAR OF THE SPM POTENTIALS UP TO 1000 V MAY BE PRESENT ACROSS INPUTS AND V CAUTION a STANDBY MODE 1 Apply control power ONLY do NOT start the motor 2 unit should power up and indicate that it is performing its power on self test When this test is success fully completed the motor type is shown collector ring or brushless and SPM READY should be blinking on the display If not then a problem exists with the microprocessor or a peripheral device 3 Obtain a list of the factory programmed setpoints and review the SPM setpoints See Section 5 2 SET POINTS MENU on
106. nformal coating 1 2 2 ACCESSORIES e PG2SPM External hardware package for overtemperature and current loss protection up to 200 A includes 1 DCCT200 and 1 CM e PGASPM External hardware package for overtemperature and current loss protection up to 400 A includes 1 DCCT400 or DCCT500 and 1 CM MSPM Mounting panel to retrofit existing SPM cutouts for SPM GE Multilin SPM Synchronous Motor Protection and Control 1 3 1 3 SPECIFICATIONS 1 INTRODUCTION 1 3 1 TECHNICAL SPECIFICATIONS PHASE CURRENT INPUTS CT primary CT secondary Conversion range Frequency Accuracy Current input burden 5 to 2000 A 5A 0 05 to 6 x CT 50 60 Hz at 2 x CT 0 5 of 2 x CT true RMS at gt 2 x CT 1 of 6 x CT true RMS 1 VAat5 A FIELD CURRENT INPUTS Type Rated load Break Max operating voltage ENVIRONMENT Humidity Operating Temp Storage Temp TYPE TESTS Dielectric Strength Insulation Resistance Transients Impulse Test EMI Static Vibration FAR TRP Form A FCX Form C 10 A AC continuous NEMA A300 1 A DC continuous NEMA R300 10 A at 250 V AC or 30 V DC 250 V AC 0 to 95 non condensing 20 C to 70 C 40 C to 85 C Per IEC 255 5 and ANSI IEEE C37 90 2 0 kV for 1 min from relays CTs VTs power supply to Safety Ground IEC255 5 500 VDC from relays CTs VTs power supply to Safety Ground ANSI C37 90 1 Oscillatory 2 5kV 1MHz ANSI C37 90 1 Fast Rise 5kV
107. nt input to the SPM from the connected CT s 5 14 SPM Synchronous Motor Protection and Control GE Multilin 6 ACTUAL VALUES 6 1 DISPLAY SCROLLING 6 1 1 DESCRIPTION The display auto scrolls through actual values when the motor is running The operator can use the scroll keys to view specific values EXC FIELD AC AMPS FUNCTION PWR FACTOR Displays the power factor of the motor 1 00 is unity positive values are leading and negative values are lagging DC AMPS Displays the exciter field current in DC Amps DC VOLTS Displays the exciter field voltage in DC Volts EXC FIELD Displays the exciter field resistance in Ohms AC AMPS Displays the motor phase current in AC Amps NOTE These values can only be seen when the motor is running GE Multilin SPM Synchronous Motor Protection and Control 6 1 6 2 STATUS 6 ACTUAL VALUES 6 2 1 MOTOR RUNNING HOURS MOTOR HRS 0 SELECT to modify FUNCTION Displays accumulated motor running hours 6 2 2 INCOMPLETE SEQUENCE TRIP COUNTER ISP TRIP CTR 0 SELECT to modify FUNCTION Accumulated number of incomplete sequence trips 6 2 3 FIELD LOSS TRIP COUNTER FLP TRIP CTR 0 SELECT to modify FUNCTION Accumulated number of field loss trips 6 2 4 PULL OUT TRIP COUNTER PO TRIP CTR 0 SELECT to modify FUNCTION Accumulated number of pull out trips 6 2 5 RESYNCRONIZATION ATTEMPTS TRIP COUNTER RESYNC CTR 0 SELECT to modify FUNCTION A
108. nt Pole Contribution 50 gt N 0 A 0 50 100 0 BE 95 0 25 50 75 100 Percent Speed 95 Percent Speed MEDIUM STARTING TORQUE MOTOR HIGH STARTING TORQUE MOTOR Figure 3 5 MOTOR TORQUE VS SPEED The upper limit of the discharge resistance is governed by the other function of the resistor which is reducing field voltage to safe levels during starting As the discharge resistance increases so does the induced voltage and at some point this voltage would be damaging to insulation or other components in the field circuit Solid state excitation and control components in the field circuit have had the effect of making the discharge resis tance and its voltage effect more significant There is a greater sensitivity to field voltage tolerance levels with solid state components GE Multilin SPM Synchronous Motor Protection and Control 3 3 3 1 OVERVIEW 3 SYNCHRONOUS MOTOR APPLICATIONS High Discharge Resistance 150 100 Pa 2 Ls 50 Low Discharge Resistance EN 0 0 50 100 95 Percent Speed Figure 3 6 FIELD DISCHARGE RESISTANCE MEDIUM STARTING TORQUE Selection of the value of the field discharge resistance is a decision that may require judicious application of several factors present on a particular drive such as torque excitation systems and control components The importance of speed for applying field cannot be over emphasized Rotor and
109. nt dependencies 4 10 SPM Synchronous Motor Protection and Control GE Multilin 4 USER INTERFACE 4 2 KEYPAD INTERFACE 4 2 2 CHANGING SETPOINTS To change SPM setpoints the user must enter the PROGRAMMING MODE This can be accomplished with the motor either off or in running mode Use the following procedure to enter the PROGRAMMING MODE 1 With the display indicating the following press the GE key items in bold italics indicate that they should be blinking on the screen Collr Ring Motor SPM READY 2 The display should now indicate that the unit is in STAT MODE Press the GE key STAT MODE SCROLL for menus 3 Press the GE key The display should now indicate that the unit is in PROGRAMMING MODE PROGRAMMING MODE SCROLL PASSWORD 4 Use the W E keys to change the password and then press the Enter key to enter the password PASSWORD 0000 ENTER to verify 5 The display should now indicate the CONFIGURATIONS menu or the CALIBRATION menu depending upon which scroll key was pressed Use the sz Zx keys to select the SETPOINTS menu SETPOINTS ENTER for menus 6 Press the Enter key to enter the setpoints menu Once in the SETPOINTS menu use the A Z keys to move through the different setpoints 7 To change a setpoint press the Enter key as prompted PF TRIP 0 80 SELECT to modify 8 Once the setpoint has been selected the value of the setpoint should blink Use the sz zx keys to change the value of t
110. o Baudrate Enable Linefreq Motorstatus Stabilizing Resynchronizing Running Motortype Brushless Ring type Ride thru Re sync PFmode No Parity Even Parity Odd Parity Internal External O N ojl OF OF A N OF CO OF CO N aj BY wy N Multilin SPM Synchronous Motor Protection and Control 9 7 9 2 MEMORY MAPPING 9 MODBUS COMMUNICATIONS Table 9 3 MEMORY MAP FORMAT CODES Sheet 2 of 2 Pwrfactor ENUMERATION MEANING Signed integer with 2 decimal places i e 100 times the real value Negative numbers are lagging power factors positive numbers are leading power factors Relaystate 0 De energized 1 Energized Revcode Unsigned integer interpreted as 4 BCD digits For example revision 1234 would be 1234 hex or 4660 decimal Runtime 0 1 05 x stall time 1 1 46 x stall time 2 2 05 x stall time 3 3 00 x stall time 16 Signed integer Statmode 0 Read only Read write Switchstate Open Closed Tripcause Squirrel cage protection Power Factor Check exciter Missing voltage Fail to resync Pull out Field loss Incomplete sequence protection N aj AJ j N ojl oj Restart 9 Field overtemperature Unsigned int
111. page 5 2 for information on setpoints b TEST MODE Built in diagnostics ensure the unit is operational prior to start up The SPM is placed in TEST MODE as follows 1 Press the GE key to enter the STAT MODE menu 2 Press the GE key again to enter the PROGRAMMING MODE menu 3 Press the GE key one more time to enter the TEST MODE menu 4 Select the required test then press ENTER to begin testing There are three tests to choose from system test SYSTEM TEST squirrel cage protection test SC PROT TEST and synchronization and power factor test SYNC AND PF TEST When entering test mode the SPM responds by opening de energizing the TRIP relay contacts When exiting test mode the SPM responds by closing energizing the TRIP relay contacts SYSTEM TEST The SPM performs a complete system test on internal memory input output devices timers and other system functions The results are displayed as the test progresses The test sequence will report any failures If a failure persists after two or three attempts the unit should be replaced The SPM must be reset if the test fails DO NOT DEFEAT THE SPM MOTOR RESTART PROTECTION BY SWITCHING THE CONTROL POWER ON AND OFF THIS ACTION RESETS THE STALL TIME caution COUNTERS AND DEFEATS MOTOR PROTECTION FROM FREQUENT RESTARTS GE Multilin SPM Synchronous Motor Protection and Control 7 1 7 1 START UP PROCEDURE 7 TESTING AND TROUBLESHOOTING Squirrel Cage Protection Test SC PRO
112. pe synchro nous motors Protection features include all of the following Cage winding and stall protection during start e Lockout feature to protect hot rotor after an incomplete start Incomplete sequence trip due to failed acceleration e Automatic acceleration time adjustment for reduced voltage starting Power factor pull out trip with auto resynchronizing feature Loss of DC field current trip e Loss of DC field voltage trip Field winding overtemperature trip After a successful start the relay automatically applies the DC field to the rotor at a prescribed slip and slip angle to minimize mechanical stresses to the shaft as well as minimizes possible electrical transients to the power system This is achieved by a dedicated output to close the DC field contactor The relay is also capable of reluctance torque synchronizing collector ring machines only A dedicated output is provided in the relay to enable the loading of the motor following the DC field application and unloading of the motor following a trip and or loss of synchronization pole slipping Control of an SCR type excitation system by means of an analog output to maintain power factor PF regula tion is available as an option GE Multilin SPM Synchronous Motor Protection and Control 1 1 1 1 OVERVIEW 1 INTRODUCTION The man machine interface MMI consists of a backlit alphanumeric display and a keypad to accommodate relay programming as well as view
113. r factor may be returned to its normal setting and the regulator will function normally MOTOR TYPE Collector Ring 5 3 3 REGULATOR GAIN REG GAIN 0 00 Range 1 to 100 ENTER to modify Step 1 FUNCTION Adjust this setpoint for optimum regulator performance MOTOR TYPE Collector Ring 5 3 4 STABILITY STABILITY 1 cyc Range 1 to 60 cycles ENTER to modify Step 1 FUNCTION This setpoint determines the number of most recent regulator output calculations to be averaged in order to help compensate for instability Regulator calculations are performed once every 100 milliseconds MOTOR TYPE Collector Ring NOTE This eliminates the need for an external RC lag compensation network 5 10 SPM Synchronous Motor Protection and Control GE Multilin 5 SETPOINTS 5 3 OPTIONAL POWER FACTOR REGULATION SETPOINTS 5 3 5 REGULATOR OUTPUT LIMIT REG OUTPUT 1V Range 0 to 10 V ENTER to modify Step 1 Dependent on the FLOOR VOLTS setpoint FUNCTION This setpoint is the upper limit of the range of the control signal output voltage This value must match the input range of the separate variable excitation equipment MOTOR TYPE Collector Ring NOTE This value must be greater than or equal to the FLOOR VOLTS setpoint FLOOR VOLTS 0 0 Range 0 0 to 10 V ENTER to modify Step 0 1 FUNCTION The floor value is the minimum limit for output control signal voltage that is connected to the field rectifier equipment The valu
114. rmation on these setpoints REG PF OFF STABILITY 1 cyc REG GAIN 10 REG OUTPUT 10 V FLOOR 5 0 V e Setting REG PF OFF places FLOOR in control of the motor field The power factor regulator is disabled e FLOOR 5 0 V is sufficiently high enough to not trip the motor due to underexcitation when started 2 Afterthe above values are stored in memory and SPM READY is displayed start the motor unloaded if pos sible and allow it to synchronize The display should indicate a leading positive power factor 3 To facilitate regulator tune up the five power factor regulator parameters can be changed while the motor is running These are the only parameters that can be changed while in the tuning mode To get in tuning mode while the motor is running enter programming mode and scroll to the REGULATOR TUNING menu Press the ENTER key to enter the menu 4 Press Vs until the FLOOR VOLTS setpoint is displayed Adjust the motor field current for a desired minimum typically between 80 to 100 of rated field current Change the floor value to a value above or below the initial value of 5 0 depending on whether more or less field current is desired The floor parame ter is the output voltage across the PF regulator output terminals N and N This method of parameter entry can only be employed while the motor is running and only for the five power factor regulator parameters NOTE 5 Once the desired minimum motor fiel
115. rminals Observing these guidelines will result in a reliable communication system immune to system transients Am Inf TING TERMINATING R CAPACITOR COM PORT RS232 225 PERSONAL COMPUTER SPM UNIT 1 SPM UNIT 2 SPM UNIT 32 GEPM RS485 RS485 CONVERTER OR EQUIVALENT power P 5232 701777A1 DWG 120 Ohm Inf TERMINATING TERMINATING RESISTOR CAPACITOR Figure 2 6 RS485 WIRING 2 8 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 1 OVERVIEW 3 1 1 GENERAL The most attractive and widely applied method of starting a synchronous motor is to utilize squirrel cage wind ings in the pole faces of the synchronous motor rotor The presence of these windings allows for a reaction or acceleration torque to be developed in the rotor as the AC excited stator windings induce current into the squirrel cage windings Thus the synchronous motor starts as an induction motor These rotor windings are frequently referred to as damper or amortisseur windings The other major function of these windings is
116. rotor field poles themselves This is usually 0 5 to 1 0 seconds The sequence of events transpiring during a voltage dip with a solid state exciter is shown in Figure 3 11 POWER FACTOR RESPONSE TO LINE VARIANCE on page 3 14 Assuming the condition of a line voltage decrease of 15 with the motor initially at unity power factor the power factor will swing leading momentarily because the generated EMF does not change until the rotor flux decreases determined by field time constant The motor will tend to maintain constant horsepower by slightly increasing line current As the field flux decreases generated EMF also decreases and the power factor will move back towards unity and there will be a load angle increase to permit motor torque to be restored to that required to drive the load During both of these sequences the motor power factor has not become significantly lagging so the power factor relay does not operate Finally when line voltage comes back to normal the power factor will momentarily swing over to lagging and the power factor protection relay will trip because the rotor flux does not respond as rapidly to change as the stator The generated EMF is low relative to line volts for a time period long enough to operate the relay A power factor device with a 1 0 second built in time delay should remain unaffected by these changes GE Multilin SPM Synchronous Motor Protection and Control 3 13 3 2 COLLECTOR RING MOTORS 3 SYNCHRON
117. rs and generators are opposite Simply the convention is that a motor has a leading power factor when it is overexcited producing reactive power A generator by convention is leading power factor when it is underexcited consuming reac tive power In order to understand this difference it is necessary to recognize that the definition of a motor voltage reference phasor is 180 displaced from its corresponding conventional generator voltage reference phasor Vap Conventional Motor Phasor VBa Vg VA Conventional Generator In VA i is VBA VAB gt Vg LEADS Wo Ia LAGS Vag IA Motoring Mode VA Vg LOAD TERMINAL VOLTAGE lA LOAD CURRENT PHASOR VBa Vag l LEADS Vg m wu la LAGS Vag Generating Mode Figure 3 12 POWER FACTOR SENSING MOTOR MODE VS GENERATOR MODE Therefore a given line current that leads the conventional generator voltage phasor will lag the corresponding conventional motor phasor The diagram above shows that IA is lagging VAB conventional motor phasor while it is leading VBA conventional generator phasor This confusion can be eliminated by defining one terminal voltage phasor for both generating and motoring modes Simply if VAB is used as the reference phasor then the leading power factor is always when the syn chronous machine is producing reactive power and lagging power factor when it is consuming reactive power Th
118. ru mode is selected the field is not removed immediately as in the resync mode Instead if the power factor dips below the trip point and persists for the PF time delay the TRIP relay will oper ate and the motor will stop Also a line current surge greater than approximately four times motor full load will cause TRIP operation if the PF time delay is exceeded Power factor trips are indicated by PWR FACTOR TRIP in the display Line current surges greater than four times rated line current are indicated by PULL OUT 3 12 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 COLLECTOR RING MOTORS 3 2 8 EFFECT OF VOLTAGE DIPS ON MOTOR POWER FACTOR Solid state excitation systems have an effect on the way motor power factor responds to line voltage dips The effect may be to cause a power factor relay to operate inadvertently This causes the motor to trip on lagging power factor caused by a transient condition which is not an actual pull out condition A solid state exciter differs from a rotating exciter in the way it responds to voltage dips The rotating inertia of a Motor Generator set may maintain excitation voltage relatively constant for several seconds but a solid state exciter has practically no built in delay in the way it responds to line voltage Therefore any delay in change of motor rotor flux following an excitation voltage change is determined by the time constant of the
119. s 1 Start the SPMPC software It is not necessary to have a SPM connected to the computer The SPMPC sta tus bar will indicate that the program is in Polling Relay mode and Not Communicating Choose an appropriate section of setpoints to program from the Programming menu e g Programming gt Configuration and enter the new setpoints When finished click OK The information is automatically stored to the computer s scratchpad memory Programming Configurations SYSTEM CONFIGURATION Motor Type ine Frequency Print Screen Power Factor Reference Internal z RS485 Min Turnaround Time 5m Statistics Mode Read write z Figure 4 3 PROGRAMMING CONFIGURATION WINDOW Repeat step 2 until all the desired setpoints are programmed Select the File gt Save As menu item to store this file to disk Enter the location and file name of the set point file with a file extension of SPM and select OK The setpoint file is now saved to disk See Section 4 1 6 LOADING SETPOINTS FROM A FILE on page 4 6 for instructions on downloading a setpoint file to the SPM relay SPM Synchronous Motor Protection and Control GE Multilin 4 USER INTERFACE 4 1 SPMPC SOFTWARE 4 1 5 EDITING A SETPOINT FILE The following example illustrates how to enter setpoints using the SPMPC program 1 Select the Programming gt Configuration menu item The following dialog box prompts for the configura tion information Programming Configurat
120. s 5 12 MECHANICAL 2 2 MEMORY 22 9 2 MISSING EXTERNAL PF VOLTAGE REFERENCE COUNTER entente tede 6 2 MODBUS MEMORY 9 2 MODBUS PROTOCOL see esu stra sagan 9 1 MOTOR FULL LOAD AMPS 5 4 MOTOR LOCKED ROTOR 5 4 MOTOR RUNNING 6 2 MOTOR Saee cte eene 5 12 MOUNTING THE SPM 2 2 OPTIONAL POWER FACTOR REGULATION SETPOINTS 5 10 ORDER CODES 1 3 ORDERING petere ien BEER EE EE 1 3 OVERHAULING LOAD power factor detection 3 15 OVERVIEW tette i qus 1 1 2 1 PANEL AND TERMINAL LAYOUT 2 5 E 5 12 PASSWORD Ex e it IINE 5 13 PERFORMANCE REQUIREMENTS 9 1 PHYSICAL 2 3 POWER FACTOR COTE 3 15 effect of voltage dips 3 13 WNGICAUON
121. scroll key s to select value of 5 0 seconds and then ENTER to accept new value PF DELAY 5 0s ENTER to modify Change the existing value of PF DELAY to 5 0 PF SUPP 6 FLC ENTER to modify This value will remain as is PF MODE ridethru ENTER to modify Select the setpoint Use the scroll keys to move to the PF MODE setpoint and then ENTER to select the setpoint PF MODE resync SCROLL to change Change the existing value of PF MODE to resync Use the scroll keys to select value of resync and then ENTER to accept new value FCX DELAY 1s ENTER to modify Press the scroll down key to move to the FCX delay setpoint This value will remain as is AC CT RTG 10 5 ENTER to modify SCROLL DOWN key to move to the AC CT RTG setpoint and then SELECT ENTER key to select the setpoint AC CT RTG 100 5 SCROLL to change FL AMPS 10 ENTER to modify Change the existing value of AC CT to 100 SCROLL Key s to select the value of 100 then SELECT ENTER key to accept new value SCROLL DOWN key to move to the FL AMPS setpoint and then SELECT ENTER key to select the setpoint FL AMPS 58 SCROLL to change Changes existing value of FL AMPS to 56 SCROLL Key s to select value of 58 and then SELECT ENTER key to accept new value LR AMPS 116 ENTER to modify SCROLL DOWN key to move to the LR AMPS setpoint and then SELECT ENTER to select the setpoint LR AMPS 226 SCROLL to change Change
122. seconds OFF ENTER to modify Step 1 INC SEQDLY OFF Brushless Range 1 to 200 seconds OFF ENTER to modify Step 1 FUNCTION If the SPM does not properly complete its starting sequence in the setpoint time the SPM will trip and display an in complete sequence condition COLLECTOR RING The time setting may be set to a value between 1 and 100 seconds but not less than the FCX delay setpoint BRUSHLESS The time setting may be set to a value between 1 and 200 seconds but not less than the sum of the FAR delay setpoint and the FCX delay setpoint MOTOR TYPE Collector Ring or Brushless GE Multilin SPM Synchronous Motor Protection and Control 5 9 5 3 OPTIONAL POWER FACTOR REGULATION SETPOINTS 5 SETPOINTS 5 3 1 DESCRIPTION The following parameters can be adjusted while the motor is running See Section 7 5 Regulator Tune Up Instructions 5 3 2 POWER FACTOR REGULATOR REG PF 0 00 Range 0 90 to 1 00 OFF ENTER to modify Step 0 01 FUNCTION The SPM is capable of providing a Closed loop PF Regulator with a very fast response The regulator may be set up to regulate motor power factor in a range between 0 9 lagging to 1 0 unity to 0 0 leading power factor This setpoint determines at what power factor the regulator will operate The regulator may be disabled in order to output the floor value see FLOOR VOLTS parameter by entering OFF This enables the operator to set up base field amperes then the regulator powe
123. sing or loose Loose electrical connections or CPU failure Connect or tighten missing or loose wires to proper terminal points on rear of unit Momentarily interrupt control power to unit and then re energize If still displaying incorrectly replace unit OR check ribbon connector between faceplate assemble and top of cradle It must not be loose shifted or skewed Contrast needs adjustment SPM Synchronous Motor Protection and Control Open lower flip door on faceplate assembly and rotate the contrast adjustment to obtain clear display 7 5 PROGRAMMING 7 TESTING AND TROUBLESHOOTING 7 5 1 PROGRAMMING EXAMPLE The following example uses the following motor data and should be referred to as the example progresses The data is for a 400 hp 4000 V ring type motor We will assume that all of the optional features available with the SPM have been installed The following pages show the keypresses made by the operator the SPM dis play response and comments concerning the programming operation The SPM READY message should be dis played at the beginning of the operation Refer to Chapter 7 for programming the SPM for brush less motors Motor 400 hp PF 0 8 720 RPM 4000 V Induced field current 0 SPD 30 A 95 SPD 17 Recommended field discharge resistance 21 Q Allowable stall time 7 seconds 50 percent run time 11 seconds The induced field voltage product of induced field in amperes and discharge res
124. speed The first characteristic is referred to as starting torque while the second character istic is usually referred to as synchronous torque In starting mode the synchronous motor salient poles are not excited by their external DC source Attempting to start the motor with DC applied to the field does not allow the motor to accelerate In addition there is a very large oscillating torque component at slip frequency produced by field excitation which could result in motor damage if full field current is applied during the entire starting sequence Therefore application of DC to the field is usually delayed until the motor reaches a speed where it can be pulled into synchronism without slip At synchronous speed the ferro magnetic rotor poles become magnetized resulting in a small torque reluc tance torque which enables the motor to run at very light loads in synchronism without external excitation Reluctance torque can also pull the motor into step if it is lightly loaded and coupled to low inertia It is convenient to make an analogy of a synchronous motor to a current transformer for the purpose of demon strating angular relationship of field current and flux with rotor position GE Multilin SPM Synchronous Motor Protection and Control 3 1 3 1 OVERVIEW 3 SYNCHRONOUS MOTOR APPLICATIONS If an equivalent current in the stator causing the transformer action then 4 will be about 180 from 2 or and the flux wil
125. sponding stator poles and run the motor at synchronous speed However when load is applied the rotor begins to slip since the torque developed is only a fraction of rated torque under separate excitation Furthermore the rotor is polar ized by the stator flux under this condition and can therefore be polarized in any direct axis alignment occur ring each 180 External excitation forces pole to pole alignment in only one orientation of the direct axis Should the rotor pull in to synchronism 180 away from the normal running alignment external excitation will build up rotor flux in opposition to the stator flux As the external excitation builds up correct alignment of rotor to stator occurs by slipping one pole and the motor will then run in normal synchronism The Field Application Control must respond in such a way as to proceed with proper application of excitation in the event the motor does synchronize on reluctance torque The following diagram demonstrates how the SPM automatically responds to reluctance torque synchronizing Excitation Applied Vpis ORIENTATION Operation For correct orientation of the reluctance torque rotor magnetization PRS times out first and the PRS flag is set PRA flag is set when VDIS falls below 40V Since both PRA and PRS flags are set simultaneously the field is applied Excitation Applied 180 Vpis PRA One Pole Slip DISORIENTATION Operation For 180 degree d
126. st be connected as shown below for proper power factor protection TYPICAL BRUSHLESS MOTOR CONNECTION 4 2 EF2 NOMENCLATURE CM FIELD CURRENT CALIBRATION MODULE DCCT DIRECT CURRENT CT DCCT M MAIN CONTACTOR VOLTAGE DIVIDER OL OVERLOAD RELAY NETWORK VDN T1 T2 T3 MOTOR TERMINALS Press OPTIONAL ACCESSORIES us ss n R Hm f i NOTES 5 lt 1 1 Fe E 1 Relays shown with no control power applied to relay EO EJ AA v 2 Trip Relay closed during normal operation J GE POWER MANAGEMENT FIELD CONTACTOR muc semen mme mem CM CM EXCITER EXCITER 7 8 V TYPICAL COLLECTOR RING MOTOR CONNECTION SUPPLY oo Ge JL 1 Foz T FIELD 5 RESISTOR 4 VOLTAGE DIVIDER FELD 11 NETWORK VDN CONTACTOR T rc R1 95 x 1 pect fh NR EUER LAO oun rers US ll u amp EXCITER z z i a gu ON REDUCED VOLTAGE 89 STARTERS REMOVE i 6 25 JUMPER AND CONNECT 5 ues A
127. synchronizing Motor designers always place a limit on the time a particular motor can be allowed to remain stalled allowable stall time An accelerated schedule can then be established for the motor in terms of running time at any speed less than synchronous as a percent of allowable stall time Increased air circulation from the rotor fan reduces the heating rate as the motor accelerates Frequency can be measured directly as an indication of speed and the designer s curves for speed versus time can be used for protection by software that integrates the time speed function The fig ure below shows the typical cage heating protection characteristics during acceleration The time speed function shown in below is determined internally by SPM software The motor speed is deter mined from the induced field voltage frequency The programmed values for maximum allowable stall time and 50 speed run time determine which characteristic of protection is required from the family of curves The SPM will cause a TRIP operation and display SQL CAGE TRIP if it calculates that the thermal limit of the cage winding is reached The SPM will also prevent an attempted restart if it calculates from learned start experience that the cage winding has not had sufficient cooling time to allow a successful start In this case the message START INHIBITED Ready in xxx min will be displayed 200 150 100 80 60 50 40 30 25 20
128. system 5 4 3 POWER FACTOR REFERENCE PF REF Internal Range Internal External ENTER to modify FUNCTION Enter the source for the voltage reference for power factor calculations See Section 2 4 Electrical installation for proper wiring details 5 4 4 RTU ADDRESS RTU ADDRESS 1 Range 1 to 254 ENTER to modify Step 1 FUNCTION Enter the Modbus slave address here which must be unique to all SPMs on the same communication link BAUD RATE 19 2k Range 300 600 2400 4800 9600 19 2k 38 4k 57 6k 115k ENTER to modify FUNCTION 5 4 5 BAUD RATE This setpoint allows the user to select the desired baud rate 5 4 6 PARITY PARITY None Range None Odd Even ENTER to modify FUNCTION Enter the type of parity necessary 5 12 SPM Synchronous Motor Protection and Control GE Multilin 5 SETPOINTS 5 4 CONFIGURATIONS MENU 5 4 7 TURNAROUND TURNAROUND 5 Range 0 to 1000 ms ENTER to modify Step 1 FUNCTION Turnaround is the delay before the relay changes from transmit to receive or vice versa This setpoint need not be adjusted unless operating on a very slow system STAT read only Range read only read write ENTER to modify FUNCTION 5 4 8 STATUS MODE This setpoint allows the user to configure the parameters in the STATUS MODE such that they are read only or read writeable 5 4 9 PASSWORD PASSWORD 0000 Range 0000 to 9999 ENTER to modify Step 1 FUNCTION This allows the user to program a new
129. t corresponds linearly to phase shift and sinusoidal to motor power fac tor 0 V is zero lagging power factor 5 V is unity power factor and 10 V is zero leading power factor Calibration 1 volt change corresponds to an 18 phase shift not available with power factor regulation Do not connect less than 1000 Q to this output 2 3 7 DC FIELD CURRENT INPUT DC field input must be sensed from a separately purchased DCCT Direct Current Current Transformer and CM Calibration Module 2 3 8 EXCITER VOLTAGE OUTPUT MONITOR The output of the field exciter must be connected to the SPM through a separate resistor when exciter voltage failure protection and or exciter voltage display is required 2 6 SPM Synchronous Motor Protection and Control GE Multilin 2 INSTALLATION 2 3 ELECTRICAL INSTALLATION 2 3 9 POWER FACTOR REGULATION OUTPUT This optional output replaces the power factor analog signal output It consists of a 0 to 10 V DC control signal which is used to control an SCR Variable Exciter output to obtain motor power factor regulation 2 3 10 CONTROL VOLTAGE If control voltage excursions occur outside the range of 85 to 265 V AC a provision is available that will allow the user to connect an external stabilizing transformer for operation with severe control power voltage dips The SPM has separate inputs for control power and power factor reference voltage This allows connection for control power from a stabilized voltage sourc
130. t source and function generator for Collector Ring Open MX switch FAR contact should close followed by FCX contact FIELD IS APPLIED message should momentarily flash on screen DC AMPS metered value will now be displayed along with other metered values Vary DC voltage as in table below and record reading Table 10 9 EXCITER FIELD CURRENT METERING RESULTS INPUT DC VOLTS EXPECTED ACTUAL TOLERANCE READING READING A DC 10 10 SPM Synchronous Motor Protection and Control GE Multilin APPENDIX A 1 COMMISSIONING DESCRIPTION PF TRIP DEFAULT 0 60 USER VALUE PF DELAY 1 0s PF SUPP 6 FLC PF MODE ridethru FAR DELAY 05 FCX DELAY 1s AC CT RTG 50 5 FL AMPS LR AMPS 25 SYNC SLIP STALL TIME RUNTIME DC CT PRIM HIGH FIELD FIELD AMPS FLD IE DLY FIELD VOLTS EX VLT DELAY INC SEQ DLY REG PF REG GAIN STABILITY REG OUTPUT FLOOR VOLTS GE Multilin DESCRIPTION CONFIGURATIONS MOTOR A 1 1 COLLECTOR RING SETTINGS DEFAULT Coll Ring USER VALUE LINE FREQ 60 Hz PF REF internal RTU ADDRESS 1 BAUD RATE 19 2k PARITY None TURNAROUND 5 STAT PASSWORD 0000 CALIBRATION FS EXC VOLT read only FS EXC AMPS FS MTR AMPS SPM Synchronous Motor Protection and Control A 1 C
131. th limited thermal capability and for short time operation Motor Power Factor during induction motor operation that is with field removed is always lagging However the degree to which the current lags the voltage is less than at pull out when field poles are excited Lagging power factor can again be utilized as an indicator of slip during induction motor operation For synchronous motors power factor monitoring can be employed to guard against pull out or loss of field conditions 3 10 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 2 COLLECTOR RING MOTORS 3 2 6 POWER FACTOR OPERATION Motor pull out protection is provided by a circuit which monitors power factor and has a built in time delay to prevent inadvertent tripping on transients The SPM senses power factor by monitoring the voltage across motor Phases One and Two and the current in Phase Three Figure 20 is a phasor diagram depicting the rela tionship of voltage and current for various power factors The SPM automatically suppresses power factor protection until the programmed setpoint FCX times out The SPM can be programmed to suppress power factor trip action if the line current is less than 6 percent or 50 percent of the rated full load current via the PF Suppression setpoint Selecting the Ridethru mode for the PF Mode setpoint places the SPM into ride through mode Selecting the Re sync mode for the PF Mode setpoint plac
132. that the motor synchronizes on reluctance torque The SPM provides the functions necessary to protect the motor during startup and in the event of asynchro nous operation During startup and restarting the SPM prevents overheating of the cage winding To protect against asynchronous operation the motor power factor is monitored Two modes of pull out protection can trip the motor if resynchronization does not occur after a programmed time delay Motor run time and the number and type of trips are recorded The SPM has an optional power factor regulator containing five adjustable setpoints that can be changed while the motor is running for convenient regulator tune up A backlit LCD display and keys allow user configurable setting ranges to meet many applications The unit comes in a compact S1 drawout case The SPM can be applied as part of a complete synchronous motor controller This consists of four parts A main device switches the motor on and off the power system Multifunction digital relays such as the GE Mul 469 Motor Management Relay provide stator protection DC field protection and control are provided by the SPM The field contactor and field discharge resistor completes the control assembly 1 1 2 FUNCTIONAL OVERVIEW The DC portion of the synchronous motor rotor assembly is protected and controlled using a drawout micro processor based multifunction relay The relay is adaptable to either collector ring or brushless ty
133. the front 4 Install the four mounting screws from the rear of the panel The case is now securely mounted and ready for panel wiring 2 2 5 SPM MOUNTING ACCESSORIES See Chapter 8 ACCESSORIES for physical dimensions and mounting requirements 2 2 SPM Synchronous Motor Protection and Control GE Multilin 2 INSTALLATION 2 2 MECHANICAL INSTALLATION 5 amp va a NaS ON NES FEN oN 5 ate N D Ow SPM PANEL CUT OUT 5 69 144 CUTOUT EX 4 Ros tO NG ae wm l NE 8 Nw 00 tO 14 il Boc P E Soe 2 z Te oe Ow t 2 1 1 DN Om e 0 Zip L gt 92 0 Y Y 38 eM 0 amp RN to an 1 2 2 i Os AN im 1 E gt AX 1 oo Figure 2 2 PHYSICAL DIMENSIONS GE Multilin SPM Synchronous Motor Protection and Control 2 3 2 3 ELECTRICAL INSTALLATION 2 INSTALLATION 2 3 1 DESCRIPTION Wire the SPM using one of the following wiring diagrams one each for brushless collector ring and brushless and collector ring Pay particular attention to the CT and PT inputs These inputs mu
134. tionally the SPM is a replacement for the older uSPM The following points detail the differences between the SPM and the uSPM when retrofitting SPM cutout size smaller An MPSPM retrofit panel can be ordered to retrofit the SPM into existing uSPM cutouts Terminal numbers have changed but terminal labels and functions remain the same VDN module has changed and the SPM must be used with the new VDN supplied with it The CM and DCCT are the same and can be used with the SPM or uSPM All uSPM options except for PF Regulation which can be ordered are standard on the SPM 2 What dol do if forget my password If a non 0000 password has been entered for access to programming it must be entered to gain write access If this password has been forgotten it may be recovered in the following manner 1 Using the GE key go to the programming section 2 Press the scroll up key 3 When asked to enter the password press and hold the scroll up key and then without releasing press and hold the enter key While both keys are held and encrypted password will appear on the screen 4 Record this password and contact the GE Multilin service center They can decode the password for you 3 What causes a run time fault A run time fault is initiated by the SPM when it calculates a metered value beyond its acceptable range The two most common causes of this are SPM measures a starting current higher than the program
135. tnt heec Ea ne pa De Een e 5 25 FIELD APPLICATION RELAY 5 2 FIELD CONTACTOR AUXILIARY RELAY DELAY 5 2 7 ACCT PRIMARY RATING cca teneret teer binant 5 2 8 MOTOR F LE LOAD nte tede cede 5 2 9 MOTOR LOCKED ROTOR AMPS 52 10 SYNCHRONOUS east cect teme e eet t 5 2 41 STALL TIME cree eie 5 2 12 RUN TIME trei ttt 5 2 13 DIRECT CURRENT CT PRIMARY 5 2 14 FIELD OVERTEMPERATURE HIGH FIELD OHMS PROTECTION 5 7 2 15 FIELD UNDERCURRENT siriusu eet titt eth ttt beri 5 8 5 2 16 FIELD UNDERCURRENT 2 444 85 5 8 5 2247 FIEED UNDERVOLTAQGE enne eot ritate nte 5 8 5 2 18 FIELD UNDERVOLTAGE DELAY 5 9 5 2 19 INCOMPLETE SEQUENCE 5 9 5 3 OPTIONAL POWER FACTOR REGULATION SETPOINTS 5 3 1 DESCRIPTION 5 10 5 82 POWER FACTOR REGULATOR 9 10 5 8 8 REGULATOR GAIN 5 10 5 3 4 STABILITY 9 10 5 3 5 REGULATOR OUTPUT LIMIT 9 11 5 26 EEOOR te en eb ett a e adt ete b E DH ed 5 11 5 4 CONFIGURATIONS MENU 5 4 44 MOTOR TYPE 5 12 5 4 2 LINE FREQUENCY 5 12 5 4 3 POWER FACTOR REFERENCE 5 4 4 ADDRESS 5 4 5 BAUD 5 12
136. to be placed across MX to MX1 interlocks NOTE This interlock must be open when the motor is engaged SPM not properly programmed Call each program address and check setpoint data against the desired setpoints usually listed in the controller elementary If the exciter voltage option is supplied exciter may not be energized Relay in tripped condition Internal connector cable loose Wiring to terminal points on rear of unit are missing loose Synchronizing slip set too low Motor cannot accelerate to slip level Correct the operation of the DC field exciter so it outputs DC Press any keyboard button to RESET Remove front panel and check ribbon connectors for tightness Ensure connectors are not skewed or partially connected to pins Connect or tighten missing loose wires to proper points on the rear of the unit Refer to the setpoint programming instructions Chapter 5 and program a higher value of percent slip FAR relay does not pick up SPM flashes FIELD IS APPLIED but contactor does not close Check external FAR contact circuit wiring Field discharge resistor sometimes shipped separately is not connected or incorrectly installed Check the connection of the field discharge resistor and correct if necessary Motor trying to accelerate excessive load A motor restart is aborted by SCP operation SQL CAGE TRIP displayed Unload or reduce load on motor shaft until FCX rela
137. to use commercially available repeaters to increase the number of relays on a single channel to more than 32 Suitable cable should have characteristic impedance of 120 Q e g Belden 9841 and total wire length should not exceed 4000 ft Commercially available repeaters will allow for transmission distances greater than 4000 ft Voltage differences between remote ends of the communication link are not uncommon For this reason surge protection devices are internally installed across all RS485 terminals Internally an isolated power supply is used to prevent noise coupling To ensure that all devices in a daisy chain are at the same potential it is imper ative that the common terminals of each RS485 port are tied together and grounded only once at the master Failure to do so may result in intermittent or failed communications The source computer PLC SCADA system should have similar transient protection devices installed either internally or externally to ensure maximum reliability To avoid ground loops ground the shield at one point only as shown below Correct polarity is also essential SPMs must be wired with all terminals connected together and all termi nals connected together Each relay must be daisy chained to the next one Avoid star or stub connected con figurations The last device at each end of the daisy chain should be terminated with a 120 Q 74 watt resistor in series with a 1 nF capacitor across the and te
138. tomatic boosting when field forcing is required and economical low field operation when the motor is idling Another application of the power factor regulator is to control power factor swings that result from various lev els of loading so as not to cause fluctuations in the plant system voltage The SPM provides the control signal to the variable SCR exciter when PF regulation is required See the fol lowing figure for a functional operation overview of this feature Main Contactor A DC Supply to Motor Field B Field Field Contactor Voltage Current SCR Input Input Proportional Exciter PF PF Feedback Detection PF Regulator 99090 Control Signal e e Setpoint Output Gain Stability Floor 701754A4 CDR Figure 3 13 POWER FACTOR REGULATION 3 16 SPM Synchronous Motor Protection and Control GE Multilin 3 SYNCHRONOUS MOTOR APPLICATIONS 3 3 BRUSHLESS CONTROLLER 3 3 1 DESCRIPTION A brushless controller provides functions relevant to starting and protecting a brushless synchronous motor To understand the functional requirements it is necessary to review the construction of a brushless motor 3 3 2 BRUSHLESS MOTOR REVIEW A brushless motor is like a conventional slip ring motor in that it has rotor mounted field poles These poles must have DC supplied to their windings so they can lock onto the rotating stator field and run in synchro nism Also like the slip ring motor amortiss
139. tpoint the minimum is twice the full load amps and the maximum value is 12 times the FLA 4 REGULATOR OUTPUT must be greater than or equal to FLOOR VOLTS likewise FLOOR VOLTS must be less than or equal to REGULATOR OUTPUT GE Multilin SPM Synchronous Motor Protection and Control 9 5 9 2 MEMORY MAPPING 9 MODBUS COMMUNICATIONS Table 9 2 MODBUS MEMORY MAP Sheet 5 of 5 GROUP ADDR DESCRIPTION RANGE STEP UNITS FORMAT FACTORY hex VALUE CODE DEFAULT DC SYSTEM 1140 DC CT PRIMARY 5 to 1000 1 A U16 5 1141 HIGH EXCITER FIELD 0 20 to 450 00 0 01 Q 2decU16 0 max 1 OFF or OFF 0 10 1 00 1142 EXCITER FIELD AMPS 0 1 to 1000 0 0 1 if lt 10A A 1decU16 0 zero OFF or OFF 1 0 if 210A 1143 EXCITER FIELD VOLTS zero OFF 1 to 200 or OFF 1 V U16 0 1144 EXCITER FIELD AMPS DELAY 0 3 to 5 0 0 1 5 1decS16 0 3 1145 EXCITER FIELD VOLTS DELAY 0 3 to 5 0 0 1 5 1decS16 0 3 1146 Reserved v 114F Reserved PF 1150 PF REGULATION LEVEL max 1 OFF 0 90 to 1 00 OFF 0 01 20 516 111 REGULATION 1151 REGULATOR GAIN 110100 1 016 1 1152 1 to 60 1 U16 1 1153 REGULATOR OUTPUT 010104 1 V U16 1 1154 FLOOR VOLTS 0 0 to 10 0 0 1 V 1decU16 0 1155 Reserved Lo dl 115F Reserved Range for collector ring motors Range for brushless motors 1 The access password must be written correctly befor
140. ty in field circuit Wiring to terminal points is missing or loose Motor has pulled out of step from excessive overload PF TRIP or PULL OUT TRIP is displayed Connect or tighten missing or loose wires to proper points on the rear of the unit Check condition of load bearing and other mechanical situations at drives Push any key to reset the SPM and restart Loss of excitation Transient power factor change occurring during system power disturbance Check exciter exciter fuse and connections to field Increase PF DELAY setting Motor is unloaded and power factor regulator reference setpoint at or near unity resulting in instability Increase REG FLOOR setpoint to override regulator to maintain stability during light load condition Wiring to terminal points on rear of unit missing or loose Exciter voltage too low causing SPM to attempt resynchronization Connect or tighten missing or loose wires to proper terminal points on rear of unit Adjust exciter transformer tap or exciter adjustment potentiometer to obtain higher exciter voltage output Field contactor closing too soon Motor cannot pull in to step since slip too high Reset SYNC SLIP to lower value Excessive shaft load greater than the motor s capability to pull into step Reduce load or unload motor during start Apply load after motor has synchronized and stabilized Wiring to terminal points on rear of unit mis
141. unter 025D Squirrel Cage Trip Counter 025 Field Overtemperature Trip Counter 025F Reserved OFFF Reserved SYSTEM ACCESS PASSWORD 0 to 9999 U16 CONFIGURATION MOTOR TYPE 00 1 Motortype LINE FREQUENCY 0 or 1 Linefreq POWER FACTOR REFERENCE 0 or 1 PFreg RTU ADDRESS 110254 U16 BAUD RATE 0 to 9 Baudrate RS485 PARITY 0102 Parity RS485 MIN TURNAROUND TIME 0 U16 STATISTICS MODE 0 or 1 Startmode NEW PASSWORD 0 to 9999 Reserved Reserved Range for collector ring motors Range for brushless motors 1 The access password must be written correctly before any setpoints can be written via Modbus The password is initially the same as the default password but the two passwords are stored separately so the keyboard can not be used to change the communications password and vice versa 2 The allowable range of FLA is as follows the minimum full load amps value is 2 5 times the CT ratio the maximum is equal to the CT ratio 3 The locked rotor current is range dependent on the FLA setpoint the minimum is twice the full load amps and the maximum value is 12 times the FLA 4 REGULATOR OUTPUT must be greater than or equal to FLOOR VOLTS likewise FLOOR VOLTS must be less than or equal to REGULATOR OUTPUT 9 4 SPM Synchronous Motor Protection and Control GE Multilin 9 MODBUS COMMUNICATIONS 9 2 MEMORY MAPPING Table 9 2 MODBUS MEMORY MAP Sheet 4 of 5 GROUP DE
142. us 3 The display should now indicate that the unit is in PROGRAMMING MODE PROGRAMMING MODE SCROLL PASSWORD 4 Use the A Z keys to change the password and then press the Enter key to enter the password PASSWORD 0000 ENTER to verify 5 The display should now indicate the CONFIGURATIONS menu or the CALIBRATION menu depending upon which scroll key was pressed Use the sz Zx keys to select the CALIBRATION menu CALIBRATION ENTER for menus 6 Press the Enter key to enter the set points menu Once in the CALIBRATION menu use the A Z keys to move through the different calibration parameters 7 change a calibration parameter press the Enter key as prompted FS EXC VOLT 1 00 SELECT to modify 8 Once the calibration parameter has been selected the value of the parameter should blink Use the xz Z keys to change the value of the setpoint and then press Enter to continue If you choose not to change this setpoint once it has been selected pressing the GE key deselects the setpoint FS EXC VOLT 7 00 SCROLL to change 9 Additional calibration parameters can be changed using the above procedure When all calibration param eter changes have been accomplished press the GE key This will return the display to the CALIBRATION main menu Press the GE key again and the display will ask to verify that changes should be save Press ENTER to save the setpoints otherwise press the GE key if you do not want to save t
143. wait for self test diagnostic to complete Should get SPM READY mes sage and TRIP relay should close 2 Turn on current source and function generator for Collector Ring Open MX switch 4 FAR contact should close followed by FCX contact FIELD IS APPLIED message should momentarily flash screen AC Amps metered value will now be displayed along with other metered values Vary current as in table below and record reading At greater than 4x motor full load a pull out trip should occur Table 10 7 AC CURRENT METERING AND PULL OUT RESULTS INPUT AMPS EXPECTED ACTUAL TOLERANCE READING READING AC AMPS 10 30 50 100 PULL OUT TRIP 10 8 SPM Synchronous Motor Protection and Control GE Multilin 10 FUNCTIONAL TESTS 10 9 EXCITER FIELD VOLTAGE METERING TEST 10 9 1 SETUP 1 Connect as in Section 10 3 COLLECTOR RING MOTOR POWER FACTOR TEST on page 10 3 or Sec tion 10 6 BRUSHLESS MOTOR POWER FACTOR TEST on page 10 6 2 Connect DC Voltage source to terminals A20 and A21 ensure correct polarity 10 9 2 RELAY PROGRAMMING a CONFIGURATIONS Program as defaults shown in Section 5 4 CONFIGURATIONS MENU on page 5 12 except for the following MOTOR Collector Ring if testing for Collector Ring application b SETPOINTS Program as defaults shown in 5 2 SETPOINTS MENU on page 5 2 10 9 3 TEST 1 Apply control power to relay and wait for self test diagnostic to complete Should get SPM
144. y picks up The motor is taking too long to start or the stall time or run time setpoint is set too low Correct as necessary Wiring to terminal points are missing or loose SPM Synchronous Motor Protection and Control Connect or tighten missing or loose wires to proper points on the rear of the SPM GE Multilin 7 TESTING AND TROUBLESHOOTING 7 4 TROUBLESHOOTING Table 7 1 SPM TROUBLESHOOTING Sheet 2 of 2 SYMPTOM Motor starts and synchronizes but shuts down immediately upon application of excitation Shutdown occurs during normal running after successful synchronization Motor starts applies DC to field and then immediately removes DC from field Display frozen garbled incorrect or unreadable GE Multilin POSSIBLE CAUSE TRIP PF setting too high CORRECTIVE ACTION Reduce TRIP PF value address 01 to no higher than 0 8 FCX DELAY setting too low Increase FCX DELAY setting to 3 seconds minimum Current voltage inputs are incorrectly wired or are from incorrect phases Check and correct wiring as required No excitation voltage Check for available DC excitation voltage If a rotating exciter driven by a motor shaft is used the exciter field should be forced rheo is shorted out during acceleration to cause exciter to build up its output as quickly as possible No excitation current open circuit at motor field brushes or leads Correct discontinui

SPM Synchronous Motor Protection and Control

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