TTR300 - BiddleMegger.com
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1. 2008 622. 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR300 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles Connect the heavy duty clamps marked 1 2 and H3 of the test lead to the corresponding high voltage winding terminals of the transformer under test Refer to Table 4 2 for test lead markings With delta connected windings is not used With wye connected windings neutral connection for HO is normally available Connect the heavy duty clamps marked 0 X1 X2 and X3 of the test lead to the corresponding low voltage winding terminals of the transformer under test Refer to Table 4 2 for test lead markings With delta connected windings is not used With wye connected windings a neutral connection for is normally available On OFF Switch It is only after all of the above connections ate safely made and all safety precautions of sections 2 and 3 are satisfied should the On OFF switch be turned to the ON position Table 4 2 Test Lead Markings for Three Phase Transformers Test Lead Marking Transformer Heavy Duty Test Lead Clamp ANSI CEI IEC Australian Terminal Voltage Boot Color Color Band HO 1N N Neutral Red White H1 1U A GA High Red Red H2 1V B B High Red Yellow H3 1W C
3. Measurements Default Units Metric v Temperature Units C w Left C Program Files PowerDB Inc PowerDB powerdb megger slug Right C Program Files PowerDB Inc PowerDB your_company_logo br E Cancel m Logos AVTMTTR300 Rev Sept 2008 56 TTR Series PowerDB Lite User Manual 12 Additional Notes a Additional forms can be filled out by repeating steps 2 3 and 6 b Forms can be printed with the File gt Print menu item or type CTRL P or press the Print toolbar button help guide may be found in the Help PowerDB Lite Help menu item Frequently Asked Questions FAQ s 1 CanI change the forms No You must have the full version of PowerDB to change forms 2 Can I synchronize forms to a database No You must have the full version of PowerDB for database support and to synchronize multiple field databases to a single master database 3 Can I import PowerDB Lite files into PowerDB Yes You can use the File Import menu item in PowerDB to import files from PowerDB Lite AVTMTTR300 Rev B Sept 2008 57 Specific Form Help Instructions Operating Instructions for the Multiple Quick Test Form Type in the asset ID and then press the Enter key Use the left and right arrow keys to select the high side winding configuration Press the Enter or Tab key Use the left and right arrow keys to select the low side winding configuration Press the Enter o
4. or C POLARITY This message shows that the H or X test leads are incotrectly connected or the test transformer connections or markings do not comply with the requirements of ANSI IEC or the Australian standard Upon completion of TEST Powering down 6 1 6 2 6 3 6 4 6 5 Upon completion of testing once directed by the on screen instruction Switch the ON OFF Switch to OFF Using an adequately grounded Safety Ground Stick ground all exposed high voltage connections Then while wearing the appropriately rated rubber gloves connect Safety Ground Jumpers from all exposed high voltage cable terminals to Local Station Earth Ground It is a good idea to leave the jumpers in place for at least as long as the specimen was at test voltage Remove the Test Instrument clamps from the Transformer leaving the Safety Ground Jumper in place to drain any stored charge Disconnect the Power Cord from the Input Power Source Lastly disconnect the safety ground cable AVTMTTR300 Rev Sept 2008 31 300 2008 32 6 Service Maintenance Maintenance should be performed only by qualified persons familiar with the hazards involved with high voltage test equipment Read and understand Sections 2 3 4 and 5 before performing any service The TTR300 requires only periodic inspection Periodically inspect all hardware items including the cable assemblies to ensure
5. 8610 Fax WWW 1 699er COM TABLE CONTENTS I GELTING TO KNOW THE TE ROOU spede aq inisa 5 Product OVERVIEW dob Are spa oes 5 1 1 Top Panel Controls s r g Z SAFE TEY JE EE ET ied ae pa 9 Safetyis the responsibility of the eneren 9 Getieral Safety Aoin TOEA AE A NN E 9 Tiiput Power u qaa manaa exte ndi aida mas bf A aa 10 9 PREPARING FOR TEST eee NR 13 3 1 Site PRATA 13 3 2 Miles 13 4 CONNECTING TO THE TRANSFORMERE 15 Single Phase Two Winding 16 Three Phase Two Winding Transformers od EXER E add e 19 Thre e Phase Tel Lranst rmersu uq W h aa uh aaa 20 Curtent Torsnes sauser seg kaun a S aa nai 20 TE Type Transformers gir ee ripam 27 S OPERATION EE EEE i EE 29 Powet up Susa testa MU M 29 Remote Control Operation for LTC Testis cruisin th Ne tq itat dira A bi I 20 Error MESS S tac A TI Don MM EM 30 Upon completion of TEST Powering P el 31 OSERVICE Hae 22 Nie 33 Fo 33 GA EE NN dena naha npuy NE 34 TIRSO0 Self dekke ak t ve ERR re AE be n 34 AVT
6. Rev B Sept 2008 50 TTR Series PowerDB Lite User Manual Select a Form i X TRANSFORMERS 1 TTR QUICK TEST 2 TTR MULTIPLE QUICK TESTS 3 TTR MULTIPLE SINGLE PHASE QUICK TESTS 4 SIMPLE 3PH TTR 56365 3PH TTR WITH CHANGER 3 Enter Test Data Header and nameplate information can be manually typed into a form b Click the Initialize Instrument button initialize the test set Form fields with automation will now be colored cyan Right clicking these fields will start the test He Edt vem Tods G m d mx 7 Press F for kvm operavon ms rucbons TRANSFORMER meen TURNS RATIO TEST SUBSTATION POSITION PAGE FOPT LOCATION DATE ASSETIO TEMPERATURE zz HMOTY Jor INVENTORY NO TESTED DY AE TAP ee ee Z L UL U E er BR 1 x9 T Has Tertary 7 Round TapVotagesTo Tap Onela Listed TestVotsge xe HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS Hz HUI 33 COMMENTS DEFICIENCIES AVTMTTR300 Rev B Sept 2008 d To change the settings of the place the mouse on the form right click Then select TTR Settings TTRPrefs x TTR Settings Show Diag Number 7 Standard ANSI Test Voltage This dialog box allows you to change the TTR settings The settings that can be changed are as follows 1 Show Diagram Number W
7. in the field Refer to Repair section Refer to Section 7 for a list of spare parts Table 6 1 MALFUNCTION Unit is not communicating responding to commands Error message ANALOG OFFSET VOLTAGE HIGH and or ANALOG GAIN OUT OF TOLERANCE appears after self test is complete Red TEST VOLTAGE ON lamp does not light on statt of testing One of the following messages appear on the test result screen CHECK CONNECTIONS PHASE or B or EXCITATION CURRENT TOO HIGH TURNS RATIO TOO LOW 0 8 or PHASE or B or C TURNS RATIO TOO HIGH CHECK PHASE or B ot C CONNECTIONS REVERSED CHECK PHASE or B or C POLARITY RATIO and or Iexc mA readings etratic Troubleshooting Guide POSSIBLE CAUSE No service power Defective line cord Defective fuse s Defective display or electronics Out of tolerance condition s in measurement circuit Defective lamp EMERGENCY TEST OFF switch is not released Problem in measuring circuit Abnormal operating condition Incorrect setting of TRANSFORMER in the quick test setup or the full test setup 1 menus Incorrect connection of leads Defective test leads Incorrect marking of a transformer Problem in test specimen Problem in measuring circuit Defective test leads open circuit poor connection Severe abnormal transient in service power Problem in test specimen p
8. neutral and ground type input source The voltage to ground from the live pole of the power source must be within the following rated operating voltage For Cat No TTR300 120 V 10 single phase sine 50 60 2 Hz For Cat No TTR300 47 230 V 10 single phase sine 50 60 2 Hz The neutral pole must be at ground potential Before making connection to the power source determine that the instrument rating matches the voltage of the power source The power input plug must be inserted only into a mating receptacle with a ground contact Do not bypass the grounding connection Any interruption of the grounding connection can create an electric shock hazard Determine that the receptacle is properly wired before inserting the plug For test sets energized with 230 V input TTR300 47 the neutral terminal of the input supply cord white or blue lead must be connected to the neutral pole of the line power source The ground terminal of the input supply cord green or yellow green lead must be connected to the protective ground earth terminal of the line power source The black or brown lead is the live hot lead The control circuits of the instrument are protected by two mains circuit fuses These fuses are located in the ON OFF switch module and replaceable by the operator To avoid electric shock and fire hazard use only the fuse specified in Sections 1 and 8 that is identical in respect to type voltage rating and curren
9. on Multiple Tap CT AVTMTTR300 Rev B Sept 2008 22 Connecting to the Transformer Bushing Current Transformer BCT Mounted on Single Phase Two Winding Transformer turn ratio test be performed after it has been mounted circuit breaker or power transformer entrance bushing The test can be performed without removal of the BCT from the equipment Proceed as follows 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR300 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles Using user supplied shorting jumper leads short circuit the winding on the opposite voltage side of the power transformer core Connect the heavy duty clamps marked H1 and H2 of the test leads to the respective X1 and X2 terminals of the BCT as shown in figure 4 7 Connect the heavy duty clamp marked X1 to the power transformer terminal on which the BCT is mounted and the X2 heavy duty clamp to the terminal on the opposite side of the power transformer winding H2 side of BCT Check to make sure that the BCT is mounted with proper polatity with respect to power transformer entrance bushing and that connection polarities ate correct BCT POLARITY MARKER TYP X1 LEAD Q H1 LEAD H2 LEAD JUMPER LEAD X2 LEAD POWER TRANSFORM
10. 4 InstallShield Wizard will complete the installation of PowerDB Lite Click Finish to close the installation program r PowerDB InstallShield Wizard InstallShield Wizard Complete Setup has finished installing PowerDB on your computer Cancel AVTMTTR300 Rev B Sept 2008 48 TTR Series PowerDB Lite User Manual Using PowerDB Lite 1 Home 1 Select your Instrument from the Instrument Setup screen You can always view the Instrument Setup screen from the Tools menu or F3 b Select the appropriate row in the Description column Then click the button in the Setup column Instruments Setup Description Setup Current Transformer Earth Forms Megohmmeter Power Factor Test Set Time Domain Reflectometer Transformer Turns Ratio Em EM Learn more about PowerDB http www powerdb com about View all forms shipped with PowerDB http www powerdb com forms For technical support cal 1 800 723 2851 3513 c The 300 310 only uses serial communicate so never check Use Ethernet if you are using a 300 or 310 Select the appropriate communication settings the Serial Device Configuration screen Use the Refresh button to find any ports that may have not been connected at the startup of PowerDB Lite If you are using a USB serial port and do not know the port assigned to it please perform the following 1 2 R
11. AVTMTTR300 Rev B Sept 2008 Instruction Manual for Three Phase TTR Transformer Turn Ratio Test Set TTR300 series Catalog Numbers TTR300 TTR300 47 HIGH VOLTAGE EQUIPMENT Read this entire manual before operating equipment Megger Valley Forge Corporate Center 2621 Van Buren Avenue Notristown PA 19403 2329 U S A 610 676 8500 WWW IMEGET COM Copyright O 2008 Megger rights reserved The information presented in this manual is believed to be adequate for the intended use of the product The products described herein should not be used for purposes other than as specified herein Specifications are subject to change without notice WARRANTY Products supplied by Megger are warranted against defects in material and workmanship for period of one year following shipment Our liability is specifically limited to replacing or repairing at our option defective equipment Equipment returned to the factory for repair must be shipped prepaid and insured This warranty does not include batteries lamps or other expendable items where the original manufacturer s warranty shall apply We make no other warranty The warranty is void in the event of abuse failure to follow recommended operating procedures or failure by the customer to perform specific routine maintenance as indicated in this manual Megger Valley Forge Corporate Center 2621 Van Buren Ave Notristown PA 19403 2329 610 676 8500 Telephone 610 676
12. C High Red Blue 2N N Neutral Black White X1 2U Low Black Red X2 2V b b b Low Black Yellow X3 2W GT oU Low Black Blue Note According to Australian standard wye and delta transformer winding connections have a numerical suffix of 1 and 2 The zigzag transformers have numerical suffix of 4 See Table A 3 AVTMTTR300 Rev Sept 2008 19 Megger Three Phase Three Winding Transformers This type of transformers has primary secondary and tertiary windings Primary and secondary windings tested as regular three phase two winding transformer test tertiary winding perform the following setup procedure 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR300 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles Connect the heavy duty clamps marked HO 1 2 and H3 of the test lead to the corresponding terminals of the transformer under test Refer to Table 4 2 for test lead markings With delta connected windings is not used With wye connected windings neutral connection for is normally available Connect the heavy duty clamps marked 0 X1 X2 and X3 of the test lead to the corresponding tertiary low voltage winding terminals YO Y1 Y2 and of the transformer under test Ref
13. ER NOTE TEST PER DIAGRAM NO FOR ANSI CEIZIEC amp AUSTRALIAN STANDARDS Figure 4 7 Setup for Testing BCT Mounted on Single Phase Two Winding Transformer AVTMTTR300 Rev B Sept 2008 23 BCTs Mounted Transformers turn ratio test be performed on all three 5 using single setup Figure 4 8 shows how to make the proper connections when the BCTs are mounted on typical delta winding and Figure 4 9 shows how when mounted on typical wye winding 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR300 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles Short circuit all windings on the opposite voltage side of the power transformer core using jumper leads Check to make sure that all BCTs are mounted with proper polarity with respect to the power transformer entrance bushing Ensure that all connection polarities are correct Make connections as shown in figure 4 8 for delta winding configurations and figure 4 9 for wye winding configurations AVTMTTR300 Rev B Sept 2008 24 Connecting to the Transformer X2 LEAD HIO 1 1 O H3 JUMPER 1 X1 LEAD H3 LEAD H1 LEAD X3 LEAD HO LEAD X2 X2 w
14. MTTR300 Rev B Sept 2008 i Megger kao ib Pe DEO 36 daas dinde tn padded efr 37 7 REPLACEMENT PARTS LIST AND OPTIONAL ACCESSORIES 00 00 0000 39 S SPECIFICATIONS wi 41 E RUE 41 Environmental Conditions 43 cdidit nr cedet te on dades Did bete te bes E 45 300 SERIES POWERDB LITE USER MANUAL 45 Introduction 45 Software Installation aaa 47 Usna Power DB tot ub E dS 49 Frequently Asked Questions FAD SY uia aiat Mr nia nie b Re ERE 57 Specific Form Help TOstr ttons n du cbr a ated En diu eeu ai RE OU 58 AVTMTTR300 Rev B Sept 2008 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Table 4 1 Table 4 2 Table 4 3 Table 6 1 Table 7 1 Table of Contents List of Figures Setup for Testing Single Phase 16 Setup for Testing Single Phase Autotransformetr nanan 17 Setup for Testing Single Phase Type Straight Design Step Volta
15. ON PAGE DATE AMBIENT TEMPERATURE sk HUMIDITY JOB TESTED BY Has Tertiary D Test Voltage Tap One Is Listed HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS Ha X1 X Hp Ht X2 XI AVTMTTR300 Rev Sept 2008 60 TTR Series PowerDB Lite User Manual Operating Instructions for the 3PH TTR with TAP Changer Form The procedure for this form is the same as the Simple TTR form The only difference is that it allows the user to enter additional nameplate information PowerDB Lite Transformer Turns Ratio inl xl File Edit View Tools Help D S gt EENE Press F1 for form operation instructions a TRANSFORMER g Piz Megger TURNS RATIO TEST coim l Logo SUBSTATION POSITION PAGE LOCATION DATE ASSET ID AMBIENT TEMPERATURE bi HUMIDITY JOB EQPT INVENTORY NO TESTED BY NAMEPLATE DATA Has Tertiary Round Tap Voltages To Tap One Is Listed Test Voltage Diag tt Hz BUSHNGWNAMEPLA SERNO I I WEATHER SERALNUM TYPE CLASS kv AMP c Li Ht 4 Ratio Mult 3 TYPE BIL 2 CLASS PHASES 1 3 X1 COOLANT Diagram 36 REASON Test Voltage OIL VOLUME _ rn First Tap Voltage LastTap Voltage HIGH SIDE TAPS TO LOW SIDE NOMINAL TURNS RATIO TESTS number Of Tests Z gt 2 300 2008 61 300
16. User friendly menu driven operation via PC AVTMTTR300 Rev Sept 2008 5 Test turn ratio phase shift in both degree centiradian excitation current Easy measuring of regular windings tertiary windings and CTs Checking reverse polarity at start of each test Via ethernet port an external PC or laptop is connected to operate the in remote control mode and to transfer test results to provide full transformer test report Quick test mode provides the fastest testing of a transformer Three excitation test voltages 80 V 40 V and 8 V Testing to ANSI IEC and Australian standards Leads marked to ANSI IEC and Australian standards Multi lingual support Meets the requirements of both the European EMC and Low Voltage Directives It is recommended that the user becomes familiar with the TTR300 before ever connecting to a transformer AVTMTTR300 Rev Sept 2008 Getting to Know the TTR300 1 1 Top Panel Controls Figure 1 1 Top Panel Controls Power input receptacle ON OFF switch and fuse holder ON OFF power switch and input power receptacle provides power to the test set Emergency OFF switch This red push button interrupts testing When pressed the switch is locked in off position reset the switch twist the button in the direction indicated by the atrows Voltage ON light Red indicator lamp indicates when lit that test voltage is being supplie
17. acitive coupling within the transformer windings If abnormal operating conditions occur during transformer testing error messages may appear such as below and may be accompanied by three short beeps CHECK CONNECTIONS This message indicates that the transformer is not connected to the test set The message may be caused by poor connection of one of the test leads as well PHASE or B or C EXCITATION CURRENT TOO HIGH This message indicates that excitation current exceeds 500 mA Excitation current can be reduced by using lower test voltages 40 V or 8 V TURNS RATIO TOO LOW 0 8 This message shows that a transformer under test turn ratio 1s less than 0 8 The TTR is not designed to test a transformer turn ratio under 0 8 PHASE A or B or C TURNS RATIO TOO HIGH This message shows that a transformer under test turn ratio is higher than 10 000 if 80 V or 40 V is used or is higher than 4 000 if 8 V is used The message may be caused by poor connection of one of the test leads as well CHECK PHASE A or B or C CONNECTIONS REVERSED This message is caused by incorrect connection of the H and X leads The H and X leads have either been reversed or the test transformer connections or AVTMTTR300 Rev B Sept 2008 30 Operation markings do not comply with the requirements of ANSI IEC or the Australian standard message may be caused by wrong diagram number specified as well CHECK PHASE or B
18. aking this connection Ensure the Input Power Source meets the requirements as listed in AVTMTTR300 Rev Sept 2008 13 3 2 4 3 2 5 3 2 6 3 2 7 Section 2 and Specifications Section 8 Also make sure that the ON OFF switch Figure 1 1 No 1 is in the OFF position Connect the input power cable to the TTR300 first then to the power source At this time leave the ON OFF switch in the OFF position Connect the Serial cable For operation of the TTR300 remote control mode using PowerDB PC software then connect the Serial cable between the TTR300 and the PC at this time Connect the Load Tap Changer cable optional If the user chooses to operate the Test button of the TTR300 from remote distance then connect the LTC cable at this time Connect the H and X leads to the TTR300 end only at this time With the clamps disconnected from the UUT connect the Bayonet Plug on the Cable labeled H to the panel connector also labeled H Repeat this process for the X labeled cable Ensure each connector is securely fastened using a clockwise rotation Connect the H and X clamps With the ON OFF Switch in the OFF position connect the H and X clamps in accordance with Section 4 as appropriate for the specific transformer type and test to be conducted AVTMTTR300 Rev B Sept 2008 14 4 Connecting to the Transformer The setup and connection instructions included i
19. all is in good condition The TTR300 may be cleaned periodically In so doing do not allow water to penetrate panel holes An all purpose household spray cleaner can be used to clean the panel Polish with soft dry cloth taking care not to scratch the display screen cover Clean the cables and mating panel receptacles with isopropyl or denatured alcohol applied with a clean cloth Fuse Replacement The TTR300 is protected by two mains fuses Fuse replacement is indicated if the electronic circuits do not function Refer fuse replacement to qualified personnel only avoid electric shock and fire hazard use only the fuses specified on Instrument panel WARNING Before replacing the fuses disconnect the power input plug from the live power source To replace fuse s proceed as follows 1 Disconnect the power cord from the TTR test set 2 Using a small flathead screwdriver carefully pry out the fuse holder of the input power module item 1 of figure 1 1 AVTMTTR300 Rev Sept 2008 33 3 Remove and properly dispose of spent fuse s 4 Install new fuse s making sure to use the type specified on Instrument panel 5 Reinstall the fuse holder in its receptacle in the input power module Connect the power cord to the test set and to an energized power source If the electronic circuits still do not function properly contact the factory for setvice Calibration complete performance and ca
20. as type PowerDB XML File Y Cancel 300 2008 53 Megger 7 Opening an Existing File Select the File gt Open menu item File name pdbxML Files of type PowerDB SML File v Cancel Open as read only b Browse to the file you would like to open c Press the Open dialog button d d Ifthe file contains multiple test dates select the date that you would like to open for editing or select New to append a new set of results to the file To remove a set of results click on the selected file and press the delete button Form name 4 SIMPLE 3PH TTR view or edit set of results select a test date and press the Test Date Open Open button 0 18 2007 14 27 02 06 07 14 26 28 New Delete Em To remove a set of results select a test date and press the Delete button Press the New button to enter another set of test results AVTMTTR300 Rev B Sept 2008 54 TTR Series PowerDB Lite User Manual 8 Loading Data Files When testing with the TTR 320 or TTR 330 you may load files saved on the instrument s USB drive Refer to Step 7 for instructions on selecting and opening files 9 Setting the Logos Options Language Measurements Default Units Metric v Select the Tools Options menu item The Logos section specifies paths to the left and right logos files to USE To change the lef
21. ay cause erroneous results as it is very difficult to have all four sides within the two clamps make contact with each other as the TTR300 utilizes Kelvin type leads it is necessary for this 1 1 quick check that all four sides of each clamp pair are electrically common Also make sure the leads properly connected and that H X pairs are not electrically in contact with each other 3 test set power on 4 After self test is complete and the unit is ready for testing 5 Enter transformer type DIAG 07 YNynO WARNING Do not continue functional test if the diagram type DIAG 07 YNynO transformer type is not listed Keep the leads which are energized clear of ground and personnel and each of the other lead pair sets 6 Start TEST 7 readings for phases B and C should be RATIO 1 0000 30 0020 PHASE min 0 5 Iexc mA 0 0 to 0 5 8 If needed as identified on the Preference screen perform the test according to steps 1 through 7 for all the excitation voltages of 8V 40 V and or 80V The readings should be the same as shown in step 7 AVTMTTR300 Rev B Sept 2008 35 Troubleshooting The Troubleshooting Guide Table 6 1 is arranged to help you evaluate the reasons for test set malfunction The table lists possible test set malfunctions which may be encountered during operation and lists possible causes Electronic circuit repairs should not be attempted
22. d to the Unit Under Test UUT Remote Trigger receptacle Plug receptacle for connecting Remote Trigger cable for testing transformers with Load Tap Changers H Cable receptacle Plug receptacle for connecting test leads to the high voltage H winding of a transformer X Cable receptacle Plug receptacle for connecting test leads to the low voltage X winding of a transformer Ground lug Wing nut terminal allows connection of test set to Station Earth ground AVTMTTR300 Rev B Sept 2008 300 2008 2 Safety Safety is the responsibility of the user Only qualified and trained operators should operate the TTR300 system Operator must read and understand this entire Instruction Manual prior to operating the equipment Operator must follow the instructions of this Instruction Manual and attend the equipment while the equipment is in use In the event of equipment malfunction the unit should immediately be de energized and returned to Megger for repair The Safety precautions herein are not intended to replace your Company s Safety Procedures Refer to IEEE 510 1983 IEEE Recommended Practices for Safety in High Voltage and High Power Testing for additional information General Safety Precautions The TTR300 and the Unit Under Test UUT should both be considered as sources of instantaneously lethal levels of electrical energy Observe the following safety precaut
23. emove the USB serial adapter Press Refresh Click on the port drop down and record the options Plug the adapter back in Press refresh AVTMTTR300 Rev B Sept 2008 49 Megger 6 Select the port that was not in the original list Verify that the baud rate is set to 9600 Parity is set to none Byte Size is set to 8 and Stop Bits is set to 1 d Only check Use Ethernet if connected to the TTR330 If you leave the IP address blank PowerDB Lite will discover the unit If you have problems with the discovery enter the IP address which is displayed on the instrument s Preferences screen Serial Device Configuration Instrument Use Transformer Tums Ratio 005905050200 Manufacturer AVO Z Meger Model T ype Series vs n Supported Models 3 Phase TTR Serial Port Refresh Byte Size 8 v Baud Rate 3600 v Parity None h Stop Bits 1 Use Ethernet Cancel e Then Click OK on the Instrument Setup Screen to finish 2 Form Select the File gt New menu item or type CTRL N or press the New toolbar button b The forms associated with the detected instrument will be shown in the Select a Form screen c Choose form by double clicking or navigating with the arrow keys and pressing the OK key d See Specific Form Help Instructions for further instruction on test steps You can view the Form Help by pressing the F1 key once the form is loaded AVTMTTR300
24. er to Table 4 2 for test lead markings With delta connected windings is not used With wye connected windings a neutral connection for is normally available On OFF Switch It is only after all of the above connections ate safely made and all safety precautions of sections 2 and 3 are satisfied should the On OFF switch be turned to the ON position Current Transformers CTs Connections to CTs are made backwards compared to power or potential transformers The H terminals on the test set must be connected to the X terminals on the CT and the X terminals on the test set must be connected to the H terminals on the CT NOTE Dots on the housing of the transformer are commonly used to identify terminals of the same polarity AVTMTTR300 Rev B Sept 2008 20 Connecting to the Transformer WARNING Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or CT Failure to observe voltage rating of low current X winding may result in damage to the CT CAUTION Never use AUTO mode of operation when testing the current transformers with the rated voltage below 80 V ac Most of the CTs are tested at 8 V ac excitation voltage NOTE Most of the current transformers are tested at 8 V ac excitation voltage Some current transformers with turn ratio of 100 5 and less get saturated at 8V ac They require lower excitation voltage for testing and therefore can n
25. for single phase two winding transformets 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 2 Connect the H and X test cables to the respective H and X receptacles of the TTR300 Make sure that the connectors securely fastened using clockwise rotation to the receptacles 3 Connect the heavy duty clamps marked H1 and H2 of the test lead to the corresponding high voltage winding terminals of the transformer under test Figures 4 1 and 4 2 show test setups for single phase transformers Figures 4 3 and 4 4 show test setups for regulators 4 Connect the heavy duty clamps marked X1 and X2 of the test lead to the corresponding low voltage winding terminals of the transformer under test Figures 4 1 and 4 2 show test setups for single phase transformers Figures 4 3 and 4 4 show test setups for regulators 5 On OFF Switch Itis only after all of the above connections ate safely made and all safety precautions of sections 2 and 3 are satisfied should the On OFF switch be turned to the ON position 1 LEAD gt O O 21 LEAD HI X1 SO TTR H2 X2 H2 LEAD X2 LEAD TRANSFORMER Figure 4 1 Setup for Testing Single Phase Transformer AVTMTTR300 Rev B Sept 2008 16 Connecting to the Transformer AUTOTRANSFORMER H2 LEAD 5 2 LEAD Figure 4 2 Setup for Testing Single Phase Autotransformer To test windings
26. ge Regulator 18 Setup for Testing Single Phase Type Inverted Design Step Voltage Regulator 18 Setup for Testing Unmounted Current Transformetr oie pria dite pedea 22 Setup for Testing Taps on Multiple Tap CT tao Quiet tbt duh quosque 22 Setup for Testing BCT Mounted on Single Phase Two Winding Transformer 23 Setup for Testing BCT Mounted on Delta Winding on a Three Phase Power Timer re 25 Setup for Testing BCT Mounted on Wye Winding of a Three Phase Transformer 26 LIST OF TABLES Test Lead Markings fot Single Phase Transformers 17 Test Lead Markings for Three Phase Transformers 19 T type Transformer Winding Phase Relationship 21 TxoublesBeopme Crude 36 Replacement Patts Lise ses mares 39 AVTMTTR300 Rev 2008 iti Megger Upon Receipt of Product Prior to operation check for loosened hardware or damage incutred during transit If these conditions are found a safety hazard is likely DO NOT attempt to operate equipment Please contact Megger as soon as possible TTR300 Transformer Turn Ratio test set AVTMTTR300 Rev Sept 2008 1 Getting to know the TTR300 Product Overview The Three Phase TTR Test Set is fully automatic self checking unit which is designed to be controlled via a computer runni
27. hen enabled this will display a numeric field below the winding configuration diagram on the form The diagram can then be changed by entering a number in this field 2 Standard This enables you to choose between the ANSI Australian or IEC Standard 3 Test Voltage This enables you to choose the test voltage at which the test is run Auto allows the instrument to choose an acceptable test voltage for testing You may choose between Auto 8 40 or 80 4 Running an Automated Test Select the Initialize Instrument button Automated fields should now turn cyan colored Right click on the cyan colored fields Follow the on screen instructions specific to the test AVTMTTR300 Rev B Sept 2008 52 TTR Series PowerDB Lite User Manual 5 Comments Deficiencies When imported into the full version of PowerDB the comments and deficiencies on each form are used to generate summary reports These summary reports repeat the notations and lists the page number where reported This allows the user to scroll to a particular page to view a reported anomaly For more information on features of PowerDB visit us at our website at www PowerDB com 6 Save the Data a Select the File gt Save menu item or press CTRL S or press the Save toolbar button b Save screen will allow you to specify location and file name for your Powet DB Lite XML file Save in PowerDB vi EI et Fr File name Save
28. ion and type of transformer Display Via external PC user supplied Memory Storage Via external PC user supplied Interface RS232 Serial Environmental Conditions Operating 23 to 122 F 5 to 50 C temperature Tange Storage temperature 58 to 140 F 50 to 60 C range Relative humidity 0 to 90 noncondensing operating 0 to 95 noncondensing storage Physical Data Dimensions 21 5 x 13 5 x 8 5 in 44 5 x 26 5 x 17 5 cm L x W x H Weight test set 25 Ibs 11 5 kg Case Ruggedized plastic case with removable lid and carrying strap AVTMTTR300 Rev B Sept 2008 43 300 2008 44 Addendum A TTR 300 Series PowerDB Lite User Manual Introduction PowerDB Lite is a free but limited capability version of the PowerDB software tool that is designed specifically to control and or extract data from Megger instruments The primary difference between PowerDB Lite and PowerDB is that PowerDB is designed to work with all manufacturers equipment and has field and office synchronization capabilities PowerDB Lite will present your test data into a professional looking data form that can be sent to a printer or pdf file distiller such as PDF995 PowerDB Lite allows you to use sub set of the standard PowerDB forms that are appropriate for specific Megger instruments PowerDB Lite detects the instrument and enables the appropriate form s Data can be entered on
29. ions Observe all safety warnings the equipment They identify areas of immediate hazard that could result in injury or death Use this equipment only for the purposes described in this manual Observe strictly the Warning and Caution information provided in this manual s Treat all terminals of high voltage power equipment systems as potential electric shock hazards Use all practical safety precautions to prevent contact with energized parts of the equipment and related circuits Use suitable barriers barricades or warnings to keep persons not directly involved with the work away from test activities Never connect the test equipment to energized equipment AVTMTTR300 Rev B Sept 2008 9 Do not use in explosive atmosphere Use grounding connection procedures recommended this manual Always disconnect test leads from power equipment before attempting to disconnect them at the test set The ground connection must be the first made and the last removed Any interruption of the grounding connection can create an electrical shock hazard Personnel using heart pacemakers should obtain expert advice on the possible risks before operating this equipment or being close to the equipment during operation Input Power Precautions This instrument operates from a single phase sine wave power source It has a three wire power cord and requires a two pole three terminal live
30. libration check should be made at least once every year This will ensure that the test set is functioning and calibrated properly over the entire measurement range The 3 phase TTR calibration is performed on each new or repaired unit before sending it to a customer There is a special 3 phase TTR final calibration procedure which requires a NIST traceable test equipment to be used As a result of such calibration procedute each TTR test set may be NIST certified To check the 3 phase TTR calibration at a customer site or in the field the Megget Calibration Standard Cat No 550055 or equivalent standard should be used To perform a quick simplified calibration check the Megger Calibration Standard Cat No 550555 may be used The last standard has eleven switchable turns ratio settings which cover the turns ratio range from 1 1 to 2000 1 TTR300 Self check customer may want to make sure that the test set is functioning properly before testing a transformer Traditionally for transformer turns ratio testets a customer performed this test by connecting H1 X1 and H2 X2 test leads The 1 1 turns ratio was expected to be measured Additionally the displayed test results were interpreted as a test set calibration check The 3 phase TTR test set is designed and optimized for the transformer turns ratio testing It uses a mixed analog digital technique to provide the high accurate readings of the tested transformer turns ratio The te
31. ment circuit shorting relays Heavy duty vatistots transient voltage suppressors and gas surge voltage protectors Output Test Voltage and Current 3 test voltages 80 V rms 40 V rms 8 V rms Current up to 500 mA Test Frequency Same as line frequency Loading of Test Transformer Less than 0 2 VA AVTMTTR300 Rev B Sept 2008 41 Megger Measuring Ranges ratio 80 V ac 0 8 to 45 000 5 digit resolution 40 V ac 0 8 to 25 000 5 digit resolution 8V ac 0 8 8 000 5 digit resolution Excitation Current 0 to 500 mA 3 digit resolution Phase Angle 90 degrees 1 decimal point for the minutes display 2 Deviation decimal point for the degree display 2 decimal points for the centiradian display Accuracy ratio 80 V ac 0 1 0 8 to 2000 0 15 2001 to 4000 0 25 4001 to 10000 0 3 10001 to 45000 40 V ac 0 1 0 8 to 2000 0 15 2001 to 4000 0 3 4001 to 10000 0 35 10001 to 25000 8 V ac 0 1 0 8 to 2000 0 25 2001 to 4000 0 35 4001 to 8000 Excitation Current rms 2 of reading 1 digit Phase Angle Deviation 3 minutes Measurement Method In accotdance with ANSI IEEE C57 12 90 Transformer Winding Phase Relationship ANSI C57 12 70 1990 CEI IEC 76 1 1993 and Publication 616 1978 AS 2374 Part 4 1997 Australian Standard AVTMTTR300 Rev B Sept 2008 42 Specifications Measuring Time 10 to 20 seconds depending on mode of operat
32. n Section 4 herein pertaining to ratio polarity and phase relation assume that the transformer under test connections and terminal markings comply with the requirements of ANSI C57 12 70 1990 American National Standards Terminal Markings and Connections for Distribution and Power Transformers The H test leads of the test set are the exciting high voltage leads 8 V 40 V or 80 V The X test leads are the low voltage leads When testing high voltage transformers caution must be used at all times and all safety precautions followed Read understand and employ all safety precautions and circuit connections described in Sections 2 and 3 herein WARNING Ensure that the transformer to be tested is completely de energized Check every winding Ensure that all terminals of the transformer are disconnected from line or load at the transformer Connections to ground may be left in place WARNING For all testing as described herein care shall be taken to ensure any and all unused clamps shall be isolated from each other from ground and from personnel WARNING Except for CTs as described herein never interchange connections between the high and low voltage transformer terminals Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or transformer AVTMTTR300 Rev Sept 2008 15 Megger Single Phase Two Winding Transformers Perform the following setup procedure
33. ng either PowerDB or PowerDB Lite software programs test set measures the turn ratio phase shift and excitation current of power distribution and instrument transformers 47 suffix added to the catalog number denotes a 230 V input power supply rather than the standard 120 V supply The test set is a portable instrument housed in a sturdy plastic case with removable lid and carrying strap The inside lining of case is metal shielded canvas carrying bag is supplied to hold all accessories The test set can be used to test single phase and three phase transformers both with and without taps in accordance with the requirements of the IEEE C57 12 90 1997 standards For three phase measurements the test set is connected to all three phases of the transformer to be tested lead selection circuitry permits automatic measurement of all phases without changing connections This feature eliminates the need to refer to hook up charts when testing three phase transformers Transformer excitation current as well as phase shift angle helps to detect transformer shorted turns or an unequal number of turns connected in parallel Operating condition error messages identify incorrect test connections abnormal operating condition or winding problems Test results are saved to an external personal computer PC via RS232 serial port Features include Fully automatic operation Self checking at power up
34. onnecting to Bushing clamps 6 pcs Instruction manual Optional Accessories Calibration Standard for Operation Check Inverter with 3 ft 0 91 m cigarette adapter cord 12 V de to 120 V ac 60 Hz 12 V de to 120 V ac 50 Hz 12 V de to 230 V ac 60 Hz 12 V de to 230 V ac 50 Hz Cat No TTR300 TTR300 47 30915 211 17032 4 4702 7 30915 220 35248 MC7144 AVTMTTR300 550555 35271 1 35271 3 35271 2 35271 4 AVTMTTR300 Rev Sept 2008 39 Item Cat No Test Leads 1 phase lead set shielded clamp end terminated H and X windings 30 ft 9 1 m 37095 3 phase lead sets shielded clamp end terminated H and X windings 30 ft 9 1 m 37093 H and X windings 50 ft 15 m 37094 Transit case for instrument leads and accessoties 37009 Field Upgrade kits TTR330 Interface panel 37089 1 TTR320 Interface panel 37089 2 TTR310 Interface panel 37089 3 TTR300 Interface panel 37089 4 AVTMTTR300 Rev B Sept 2008 40 8 Specifications Electrical Input Power Cat No TTR300 120 V ac 10 single phase sine 50 2 Hz or 60 2 Hz 100 VA IEC 1010 1 installation category II Cat No TTR300 47 230 V 10 single phase sine 50 2 Hz 60 2 Hz 100 VA IEC 1010 1 installation category II Protective Devices Fuses 2 Cat No TTR300 Type T 250 V 3 5A IEC 127 designation Cat No TTR300 47 250 V 1 5 IEC 127 designation High voltage and low voltage measure
35. ontrol Operation for LTC Testing Use the remote control mode of the TTR for load tap changer LTC testing The remote control mode provides two way communication between the operator and the allowing you to stay close to LTC change taps and initiate the test routine Connect the hand held control unit Megger p n 30915 220 to the Remote Trigger Receptacle pott of the TTR The remote control unit pushbutton lamp will illuminate Now an operator may come to the remote location and set for example the LTC to the desired position and would then deptess the remote control unit pushbutton for short time then release it The pushbutton lamp extinguishes AVTMTTR300 Rev Sept 2008 29 until the is ready for the next test When the current testing is complete the test results are automatically saved the pushbutton lamp lights and the TTR test set is ready for the next remote test Error Messages When an error message appears indicating abnormal operating condition verify the condition by taking a repeat measurement before attempting to take any cofrective action Open connections wrong connections open windings shorted windings high resistance windings other abnormal transformer problems or a combination of these may cause a large deviation from normal turn ratio or indicate an unusual message The unusual operating conditions may be caused by an abnormal leakage reactance or cap
36. oor connection Problem in measuring circuit AVTMTTR300 Rev B Sept 2008 36 Replacement Parts List Optional Equipemtn Repairs Any service or repair of this equipment should be performed only by qualified persons who are aware of electrical hazards and the necessary precautions required to prevent injury Megget offers a complete Repair and Calibration Service and recommends that its customers take advantage of this service for routine maintenance or in the event of any equipment malfunction In the event Service is required contact your Megger representative for a product Return Authorization RA number and shipping instructions Ship the product prepaid and insured and marked for the attention of the Megget Repair Department Please indicate all pertinent information including catalog numbet serial number and problem symptoms AVTMTTR300 Rev B Sept 2008 37 300 2008 38 7 Replacement Parts List Optional Accessories Table 7 1 Replacement Parts List Item Three phase Transformer Turns Ratio Test Set 120 V 10 single phase 50 2 Hz or 60 2 Hz 100 VA 230 V ac 10 single phase 50 2 Hz or 60 2 Hz 100 VA Included Accessories Canvas catrying bag for test leads Power supply 8 ft 2 5 m Ground lead 15 ft 4 6 m Hand held switch assembly for LTC remote control testing PowerDB Lite Software Serial cable for c
37. ormers represent special type of thee phase transformer This transformer may be tested as single phase transformer In this case the jumpers indicated in Table 4 3 should be applied to the appropriate terminals of the T type transformers The measured turn ratio should be compared to the calculated turn ratio indicated in Table 4 3 pe Transformer Winding Phase Relationship Winding Connection Winding Tested Winding Tested IEC External Phase High Low Vector High Voltage Low Voltage jumpers tested Voltage Voltage Calculated Group Winding H Winding X Winding Winding Turn Ratio Remarks A B AVTMTTR300 Rev 2008 27 300 2008 28 5 Operation Power up Proceed only after reading and fully reading and understanding Sections 2 3 and 4 herein with particular attention on the Safety related precautions Once all Safety precautions are taken and all circuit connections are made then the user may safely turn the ON OFF switch to the ON position and operate the test instrument as described herein EMERGENCY SHUTDOWN For Emergency shutdown Push red EMERGENCY OFF button or toggle On OFF switch to OFF On power up a beep sounds the test set performs a self test check and all hardware and software variables initialized Proceed to Addendum for operation via external PC supplied by User Remote C
38. ot be tested with the Cat No TTR300 For this case use the TIR100 or 25 Unmounted CTs With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR300 Make sute that the connectors are securely fastened using clockwise rotation to the receptacles shown in Figure 4 5 connect the heavy duty clamps marked H1 and H2 of the test lead to the respective X1 and X2 terminals of the CT Note that the H and X leads are connected in reverse as compared to the Single and Three phase Transformer testing described in the previous sections shown Figure 4 5 connect the heavy duty clamps marked X1 X2 of the test lead to the respective H1 and H2 terminals of the CT Ensure correct polarity Note that the H and X leads are connected in reverse as compared to the Single and Three phase Transformer testing described in the previous sections AVTMTTR300 Rev B Sept 2008 21 POLARITY DOT H2 X2 Lak BUS OR USE HEAVY GAUGE LEAD WIRE X1 LEAD NOTE TEST PER DIAGRAM NO 1 FOR ANSI CE I IEC 4 AUSTRALIAN STANDARDS Figure 4 5 Setup for Testing Unmounted Current Transformer Figute 4 6 shows the setup for testing the taps on multiple tap CT NOTE TEST PER DIAGRAM 1 F R ANSI CEIZIEC amp AUSTRALIAN STANDARDS Figure 4 6 Setup for Testing Taps
39. other than H1 H2 and X1 X2 ensure that the heavy duty clamp marked H1 is connected to the lower numbered terminal and H2 to the higher numbered terminal of the high voltage winding Similarly X1 and X2 should be connected to the low voltage winding Test lead markings for the ANSI CEI IEC and Australian standards are as shown in Table 4 1 Table 4 1 Test Lead Markings for Single Phase Transformers Test Lead Marking Transformer Heavy Duty Test Lead Clamp ANSI Australian Terminal Voltage Boot Color Color Band H1 1U High Red Red H2 1 V A High Red Yellow X1 2U As Low Black Red X2 2V a Low Black Yellow AVTMTTR300 Rev Sept 2008 17 Megger X1 LEAD SERIES WIND ING RAISE DIRECTION SOURCE v LOAD 32 TTR SHUNT WINDING COMMON X2 LEAD Figure 4 3 Setup for Testing Single Phase Straight Design Step Voltage Regulator X1 LEAD SERIES WIND ING SOURCE L N LEAD 5 RAISE x TTR DIRECTION SHUNT WINDING H2 LEAD gt 1 COMMON Figure 4 4 Setup for Testing Single Phase Inverted Design Step Voltage Regulator AVTMTTR300 Rev B Sept 2008 18 Connecting to the Transformer Three Phase Two Winding Transformers Perform the following setup procedure for three phase two winding transformers
40. owerDB Lite CD into your CD ROM drive and follow the on screen instructions 1 Accept the terms of the License agreement License Agreement Please read the following license agreement carefully Press the PAGE DOWN key to see the rest of the agreement POWER DB INC SOFTWARE LICENSE AGREEMENT READ THE FOLLOWING TERMS AND CONDITIONS BEFORE INSTALLING THE SOFTWARE IF YOU DO NOT AGREE WITH THEM PROMPTLY RETURN THE SOFTWARE AND THE ACCOMPANYING ITEMS INCLUDING MANUALS TO POWER DB INC 4064 STATE HIGHWAY 6 SOUTH COLLEGE STATION TEXAS 77845 FOR REFUND OF THE PRICE PAID Do you accept all the terms of the preceding License Agreement If you select No the setup will close To install PowerDB you must accept this agreement 2 Choose the destination location for the PowerDB Lite files 5 5 Choose Destination Location Select folder where setup will install files Setup will install PowerDB in the following folder To install to this folder click Next To install to different folder click Browse and select another folder Destination Folder C Program Files PowerDB IncPowerDB Browse nstallShield lt Back Cancel AVTMTTR300 Rev B Sept 2008 47 Megger 3 Select Default Settings Default Settings Language American English Default Units InstallShield EN
41. r Tab key Select the test voltage from the dropdown menu then press Enter or Tab Type in the high side tap number and press the Enter key Type in the high side voltage and press the Enter key in the low side tap number and press the Enter key in the low side voltage and press the TEST key F2 or right click on the blue highlighted fields Hit the Enter key and repeat for each tap you would like to test AVTMTTR300 Rev Sept 2008 58 TTR Series PowerDB Lite User Manual PowerDB Lite Transformer Turns Ratio File Edit View Tools Help B l gt Yat Hz x eA pe Your m E n lt LJ A Hy Hs 3 Press F1 for form operation instructions ASSET ID Select Test Voltage Auto TEST DATE HighSide Low Side N H1 Hg X1 X Ho H1 Xo X Voltage Voltage Calc Actual 9 Phase Actual v TeP kv Ratio Ratio Error min Ratio Error mA min Ratio COMMENTS 6 20 2008 H X3 X Phase Error min Operating Instructions for the Simple 3PH TTR Form This form can be used for testing a two or three winding transformer with multiple taps on one or more of the windings If you are testing three winding transformer please check the Has Tertiary checkbox Next select the winding configuration by using the left and right arrow keys Press the En
42. screen ot captured directly while using the test instrument Completed data forms can be saved as files to your computer Minimum Recommended System Operating System Windows 2000 ot later RAM 64 MB RAM minimum 512 MB RAM recommended Processor 300 MHz Pentium Class processor minimum 1 GHZ or better recommended For information about the features of the full version of PowerDB please visit our website at www powerdb com Get acquainted with the following features by scheduling a live demonstration at info powerdb com Synchronize All of Your Test Records Into a Single Corporate Database Reduce Test Time Improve Data Integrity AVTMTTR300 Rev B Sept 2008 45 Standardize Test Procedures Easily Use Historical Trending for Evaluation of Test Results Eliminates the Need to Install and Maintain a Software Application per Instrument Eliminates All Hand Written Test Sheets Create Your Own Test Forms Use or Modify One of Our 200 Built in Test Forms One Step Procedure To Generate Test Reports With Table of Contents and Deficiency Summaries Allows All Of Your Field Test Data Be Integrated With CMMS Systems Such As Maximo or SAP Imports gt From Many Other Industry Standard Software Applications Controls and Imports Data From Many non Megger Instruments AVTMTTR300 Rev B Sept 2008 46 TTR Series PowerDB Lite User Manual Software Installation To install PowerDB Lite load the P
43. st set measurement approach is based on high impedance input and output transformer voltage monitoring circuits The high impedance of the monitoring circuits is optimized for the accurate transformer turns ratio testing When performing a 3 phase TTR functional test the H and X test leads interconnect the input and output monitoring circuits without a transformer being connected Such connection cause an impedance mismatch and as a result of the mismatch the displayed turns ratio reading is not exactly 1 1 as it may be expected A customer should be aware that a functional test is not a real transformer turns ratio test Due to the intrinsic and inevitable impedance AVTMTTR300 Rev B Sept 2008 24 Replacement Parts List Optional Equipemtn mismatching the 3 phase TTR functional test readings may be from 0 9980 to 1 0020 The functional test readings do represent its calibration It simply shows that the test set circuitry functions properly check the 3 phase TTR calibration a customer should use the Calibration Standards mentioned in Calibration section of the manual To perform a 3 phase TTR functional test proceed as follows 1 Turn test set power off 2 Connect H1 and X1 clamps to electrically common point such as an unused bare wire Likewise electrically connect the H2 and X2 clamps the H3 and X3 clamps and lastly the HO and 0 clamps Directly connecting two clamps together m
44. t rating Refer to the Fuse Replacement procedure in the Service section AVTMTTR300 Rev B Sept 2008 10 Safety WARNING Before replacing the fuses disconnect the power input plug from the live power source AVTMTTR300 Rev B Sept 2008 11 300 2008 12 3 PREPARING FOR TEST 3 1 Site Preparation Choose a location that meets the following conditions z location is as dry as possible There is flammable material stored in the vicinity The test area is adequately ventilated Be sure all equipment is de energized and all terminals of the UUT are accessible Erect suitable safety barriers to protect the operator from traffic hazards and to prevent intrusion by unauthorized personnel User provided Warning lights are recommended Verify that the Local station ground is intact and has impedance continuity to earth 3 2 Making Circuit Connections Connections should be made in the order as listed below 3 2 1 Ground Use the Megger supplied Safety Ground Cable 15 ft 4 6 m to connect the TTR300 Wing Nut Ground Terminal directly to Local Station Earth ground Ensure the Transformer chassis also has impedance continuity to Local Station Earth ground potential 3 2 2 Input Power Source Ground Input Power Source Ground Terminal should be less than 100 milliohms of impedance to Local Station Farth Ground 3 223 Connect the Input Power Cord Before m
45. t logo press the 4 button by the left logo path The Open screen allows you to browse to a file location select a JPG or BMP file and press the Open button Repeat steps c and d for the right logo path Note that a logo will not be shown if the logo file path is blank or the file does not exist Note after specifying the logo files the image will not be shown until the next time a form is opened File Open or the File New menu items Note that the logos will look the best if the resolution of the file is pixels wide by 240 pixels high DPI is not important InternationalE nglish Temperature Units C Logos Left C Program Files PowerDB Inc PowerDB powerdb megger slug 2 Right C Program Files PowerDB Inc PowerDB your company logo br El Cancel AVTMTTR300 Rev B Sept 2008 55 Megger 10 How to change Languages Select the Tools gt Options menu item b Select the approptiate language in the dropdown menu Language InternationalE nglish Measurements Default Units Metric v Temperature Units C m Logos Left C Program Files PowerDB Inc amp PowerDB powerdb megger slug 2 Right C Program Files PowerDB Inc PowerDB your company logo br 11 How to change units of measurement a Select the Tools gt Options menu item b Select the units in the drop down Default Units under Measurements Language IntemationalE nalish
46. ter or Tab key to move to the next field default total number of tests is defined as follows 1 Test for each secondary or tertiary tap tested with the primary nominal tap 2 Test for each primary tap with the nominal secondary or tertiary tap If you do not wish to test all of the secondary or tertiary taps you can reduce the tests field for each category of tests primary secondary tertiary Once the total number of taps and the tests field are entered the form will display the cotrect number of rows to perform testing Once the voltage is entered for the first and last tap values from the transformer s nameplate tap voltage table the ratios for all taps will AVTMTTR300 Rev B Sept 2008 59 Megger automatically be calculated and populated Please note that the calculated values can be over written Right click on each of the blue highlighted fields in each table to run the tests PowerDB Lite Transformer Turns Ratio File Edit View Tools Help ALCEO Press F1 for form operation instructions Arz Megger SUBSTATION EQPT LOCATION ASSET ID EGPT INVENTORY NO TU 0 866 om 1 732 Diagram 36 First Tap Voltage LastTap Voltage Number Of Tests 5 mm L pe Off Load SECOND L 7 Round Tap Voltages To PRIMARY CALC Ja ao a 5 BE Em TRANSFORMER TURNS RATIO TEST POSITI
47. w 7 OR Xi XO X1 are LEADS lt TYP BCT TEST SELECTION WINDING STANDARD i DIAGRAM NO IEC VECTOR CODE ANS I 19 YNyO CE IZ IEC 30 YNyO AUSTRAL AN 14 YNyO PHASE A TEST MEASURES BCT ON H1 POWER TRANSFORMER TERMINAL BCT A PHASE B TEST MEASURES BCT ON H2 POWER TRANSFORMER TERMINAL BCT B PHASE C TEST MEASURES BCT ON H3 POWER TRANSFORMER RMINAL BCT C Figure 4 8 Setup for Testing BCT Mounted on Delta Winding on a Three Phase Power Transformer AVTMTTR300 Rev B Sept 2008 25 Megger H2 H2 OR HO H1 H3 JUMPER LEADS TYP H3 H1 LEAD HO LEAD H2 LEAD LEAD X1 O XO JUMPER BET TYP BCT POLARITY MARKER TYP X1 LEAD LEAD X3 I BCT TEST SELECTION WINDING STANDARD TABLE NO DIAGRAM NO ANS I 5 4 TA CEI IEC 29 AUSTRAL AN 13 PHASE A TEST MEASURES OWER TRANSFORMER PHASE B ST MEASURES OWER TRANS ER PHASE C ST MEASURES Te ne POWER TRANS ER EAD X2 EAD ERM I NAL ERM I NAL YNynO YNynO YNynO ERMINAL BCT BC1 BC1 IEC VECTOR CODE A r p T Figure 4 9 Setup for Testing BCT Mounted on Wye Winding of a Three Phase Transformer AVTMTTR300 Rev B Sept 2008 26 Connecting to the Transformer T Type Transformers T type transf
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