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EZCT-2000A User`s Manual - Vanguard Instruments Company, Inc.

1. WLA MLA M 101 UL Figure 14 Graphic Report Showing Knee Point Marker EZCT 2000A USER S MANUAL REV1 4 2 Enabling and Disabling the Buried CT in Transformer Delta Option 4 2 1 Enabling the Buried CT in Transformer Delta Option If you are measuring the turns ratio of a CT buried in the transformer Delta windings see Figure 15 and Figure 16 for further information you must first enable the Buried CT in Delta option from the SETUP menu using the steps below a Start from the START UP menu 16 168 SETUP 10 24 25 i TEST PLANS i DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID FRIHT RECORD RECORD DIRECTORY SAVE RES RECORD ERASE RECORD HEAT E Le Pl e Press the 6 key NEXT PAGE The following screen will be displayed EIE BURIED CT DELTA a ENEE MAREEE 4 DATA Press the 2 key BURIED CT IN DELTA d The following screen will be displayed 1 BURIED CT DELTA OW 2 BURIED CT DELTA OFF Press the 1 key BURIED CT DELTA ON REV1 EZCT 2000A USER S MANUAL e 4 2 2 The following screen will be displayed RATIOS HILL ADILUZSTED BY 2 3 OL SURE 1 YES ee HO Press the 1 key YES The following screen will be displayed BUEIED CT DELTA RATIOS
2. 50 3 5 2 Printing a Directory of Test Plans Stored in the EZCT 2000A s Memory 52 3 5 3 X Printing a Directory of Test Plans Stored in a USB Flash Drive 54 354 Pre a Test temi oque d tun RMI 56 3 5 5 Erasing Test Plans From the Flash 0 0 0 08 6 58 3 5 6 Erasing Test Plans From a USB Flash 61 3 5 7 Loading a Test Plan from the EZCT 2000A s Flash EEPROM 64 3 5 8 Loading a Test Plan from a USB Flash 66 3 5 9 Running a Test Using a Loaded Test 68 3 5 10 Unloading a Test Plan from the Working Memory 73 4 0 CHANGING SETUP 5 1 0 74 4 1 Setting the Knee Point Marker 1 00 2 2 4444 1 4 ns 74 4 2 Enabling and Disabling the Buried CT in Transformer Delta Option 76 4 2 1 Enabling the Buried CT in Transformer Delta 76 4 2 2 Disabling the Buried CT in Transformer Del
3. lt OHMS gt o 4 O O o Ooz L 2 Soo O Ob OOO 7Lo bo gt gt 5 gt 5 wu Odot3co sors O o oio e gt 2 lt o Oo _ 1 lt O40 54 1 2 5 5 5 lt gt 2 5 lt lt wrt Ottoc 1256 O LSF O o LOOO La 22 LIS o zoo 1 4 lt A rar 400 1 5535 e 22 o Sooo ALLE 2521 2 gt gt gt 20900 3 L coc Lei B 292 m OHMS WINDING RES o 5 AMPS o gt gt gt mrir ASA Aao S0 Er ASA Loro I Hp p N x CT 5 gt lt YKP XC ESEEES 5 gt lt gt IE aos 7 VOLTS o AMPS r EEE 45S VK p EEE 45S I Neame PLATE RATIO TE MEASURED RATIO 200 gt lt A7 gt gt o os 25 115 gt 1 ty IN PHASE PPHASE ANGLE gt o oB 79 5 VOLTS o lt gt 5 5 gt AMPS gt lt 0 TAT ION CUR CURRENT RATIO ERROR TABLE BURDEN PERCENT RATED CURRENT 5 0 A UA COS 50 100 120 200 0 22 0 13 0 08x O 06x 0 05 Figure 6 Typical EZCT 2000A Tabulated Report Printout REV1 7 2000 USER S MANUAL Item Number N Oo RP OQ 11 12 13 14 15 16 17
4. AMY TO COHTIHLE Press any key to continue The following screen will be displayed TEST RESULTS b 2 MO Press the 1 key YES if you would like to print the test results Press the 2 key NO if you do not want to print the test results REV1 2 2000 USER S MANUAL g The following screen will be displayed Press the 1 key YES to keep the test results h The following screen will be displayed Press any key to continue i Thefollowing screen will be displayed Press the 1 key YES to save the record The following screen will be displayed momentarily EZCT 2000A USER S MANUAL REV1 The following confirmation screen will then be displayed Press any key to return to the START UP menu REV1 2 2000 USER S MANUAL 3 5 10 Unloading a Test Plan from the Working Memory To unload the test plan from the working memory and clear all the test plan parameters b Start from the START UP menu TEST le 1 18 24 29 TEST PLANHS 4 DIAGHOSTIC Press the 3 key TEST PLANS The following screen will be displayed LOAD PLA UNLOAD TEST PLAH FLAW DIRECTORY ES TRACT TEST Jw TEST FLAN ERASE TEST PLAH CORY TO THUME DRIVE m Lei Press the 2 key UNLOAD TEST PLAN The following screen will be displayed TEST
5. MODEL COMMENTS TEST PLAN NUMBER OF COMPANY STAT ION T MEF MOGEL Comment S TEST PLAM OF COMP aris STAT I OMN T gt TEST PLAN COMPAN rir r MODEL Comment gt 1rT1E3E F TEST TESTS APPARATUS TEST ING AN SHASTA SWI T CHYARD SHA Soca MITSUBISHI ESL EECCT EIC D 1 Ooc y 25 oO0 r1 rJLUFAESE F at TESTS ic APPARATUS TESTING CCe cCur 1 5 MAIN CTT SaD TESTS 2 LAB Figure 11 Typical EZCT 2000A Flash EEPROM Test Plan Directory Printout C l EZCT 2000A USER S MANUAL REV1 3 5 3 Printing a Directory of Test Plans Stored in a USB Flash Drive To print a directory of all the test plans stored in a USB Flash drive a Make sure the USB Flash drive is inserted the EZCT 2000A s Flash drive port USB MEM port Then start from the START UP menu TEST Ba le 1 24 ie FUE 15 24 25 TEST PLANHS 4 DIAGHOSTIC Press the 3 key TEST PLANS b The following screen will be displayed LOAD FLAW UNLOAD TEST FLA DIRECTORY ESTRACT TEST PLAN TEST PLA ERASE TEST FLAW a TO THUME DRIVE LH F3 with CH 1 Press the 3 key PLAN DIRECTORY
6. You can continue to erase additional records or press the STOP key to exit to the START UP menu REV1 EZCT 2000A USER S MANUAL 2 ERASE ALL RECORDS Press the 2 key ERASE ALL RECORDS if you would like to erase all of the test records stored in the USB Flash drive The following confirmation screen will be displayed ERASE ALL DRIVE BE CORT YOU SURE ENTER TO COMTIHUE If you would like to cancel the erasure process press the STOP key No records will be erased and you will be returned to the START UP menu Press the ENTER key to continue with the erasure process The following screen will be displayed while the records are being erased ERASING ALL THUMB DRIVE FECORDS FLEASE WAIT The following screen will be displayed after all of the test records have been erased ALL DEIVE RECORDS ERASED Press any key to return to the START UP menu EZCT 2000A USER S MANUAL 1 3 5 Working With Test Plans A test plan is comprised of the saturation test voltage current range selection CT nameplate ratios and CT winding terminal combinations X1 to X5 for each test Up to 10 test definitions can be stored per test plan up to 128 CT test plans can be stored in the EZCT 2000A s Flash EEPROM The ability to use test plans makes CT testing an extremely simple process To perform a test the EZCT 2000A is connected to the CT te
7. ID da PRIHT FECORD 5 RECORD DIRECTORY SAVYE RES RECORD a ERASE RECORD HEST Press the 4 key SAVE RES RECORD c The following screen will be displayed RESTORE 1 ENTER RECORD HUMBER If you have a USB Flash drive inserted in the EZCT 2000A s USB port the following screen will be displayed instead of the above screen NOTE 1 RESTORE RECORD 2 TO THUME DRIVE Press the 1 key RESTORE RECORD The following screen will be displayed EZCT 2000A USER S MANUAL REV1 1 INTERNAL STORAGE 2 DRIVE Press the 1 key INTERNAL STORAGE The following screen will then be displayed REZTOURE 1 EHTER RECORD HUMBER gt SCROLL TO SELECT Continue with the steps below 1 ENTER RECORD NUMBER If you know the record number that you would like to restore press the 1 key The following screen will be displayed RESTORE HUMBER Type the record number using the alpha numeric keypad and then press the ENTER key The test record s graph will be displayed as shown below 1000 00 F SATURATION PLOT Press any key to continue REV1 EZCT 2000A USER S MANUAL The following screen will be displayed RECORD RESTORED RECORD Ne les a If you do not want to print the test record press the 2 key NO test record will b
8. REV1 7 2000 USER S MANUAL 2 COPY ALL RECORDS Press the 2 key COPY ALL RECORDS if you would like to copy all the test records from the EZCT 2000A to the USB Flash drive The following screen will be displayed SAVIHG RECORD 1 TO THUME DRIVE PLEASE WAIT The above progress screen will be displayed for each test record being copied When all the test records have been copied the following screen will be displayed ALL RECORDS TEAHSFERRED TO THUME DRT WE Press any key to return to the START UP menu EZCT 2000A USER S MANUAL REV1 3 4 7 Erasing Test Records From the Flash EEPROM You can erase individual or all test records stored in the EZCT 2000A s Flash EEPROM To erase a test record a Start from the START UP menu FUH TEST He 16 18 SETUP 10 24 25 a TEST FLAHS i DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed ID 2 RECORD xc RECORD DIRECTORY 4 SAVE EES RECORD ERASE RECORD HEST Press the 5 key ERASE RECORD c The following screen will be displayed ERASE RECORD 1 ERASE SINGLE REC 2 ERASE ALL RECORDS The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000A s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 ERASE INTERNAL REC 2 E
9. The following screen will be displayed 1 IHTERHAL DIRECTORY 2 DRIVE DIR Press the 2 key THUMB DRIVE DIR d The following screen will be displayed while the test plan directory is being printed FERIHTIHG DIRECTOR You will be returned to the START UP menu once printing is finished A typical USB Flash drive test plan directory printout is shown in Figure 12 200 REV1 7 2000 USER S MANUAL THUE Dr FPBPEILCENAME F L rar c2c TEST S OF S G U A FL LAB C Ir 2 ANT ST AT I OMN CIRCUIT MODEL EZCT THUMS DF F rLIE FIer1E FJLIFTESECF OF TEST S LE CIF COME eJ Y ST aT roe CIRCUIT MODEL E ITCCTY ODEV BEIL ENAN ARN O gt Z OF TEST a1 sAN G U A D Lee CIE emu ST aT I OMN CIRCUIT MODEL EZCT S Figure 12 Typical USB Flash Drive Test Plan Directory Printout EZCT 2000A USER S MANUAL REV1 3 5 4 Printing a Test Plan To print a test plan Start from the START UP menu TEST Ba le 1 Sa 18 24 25 TEST PLANHS 4 DIAGHOSTIC Press the 3 key TEST PLANS
10. USER S MANUAL Type the test plan number that you would like to load and press the ENTER key If you do not know the test plan number you can print a test plan directory using the instructions in section 3 5 2 d The following screen will be displayed Press any key to return to the START UP menu EZCT 2000A USER S MANUAL REV1 3 5 8 Loading a Test Plan from a USB Flash Drive To load a test plan from a USB Flash drive a Make sure the USB Flash drive is inserted in the EZCT 2000A s USB Flash drive port USB MEM port Then start from the START UP menu TEST mz le 1a 24 ie FUE 15 24 25 TEST PLANHS 4 DIAGHOSTIC Press the 3 key TEST PLANS b The following screen will be displayed LOAD TEST PLAH 2 UNLOAD TEST PLAN a PLAN DIRECTORY 4 EXTRACT TEST PLAN TEST PLA gt ERASE TEST CORY TO THUME DRIVE Press the 1 key LOAD TEST PLAN The following screen will be displayed 1 INTERHAL STORAGE 2 THUME DRIVE Press the 2 key THUMB DRIVE d The following screen will be displayed LOAD TEST HUMBER Type the test plan number that you would like to load and press the ENTER key If you do not know the test plan number you can print a test plan directory using the instructions in section 3 5 3 REV1 2 2000 USER S MANUAL e The following screen will be displayed FLAW maa LOSTET SAVE FLA
11. b The following screen will be displayed LOAD TEST FLAH UNLOAD TEST FLAW FLAW DIRECTOR ES TRACT TEST PRINT TEST PLANH ERASE TEST FLAW CORY TO THUME DRIVE i oiu O Roi Big Press the 5 key PRINT TEST PLAN The following screen will be displayed FEINT TEST HUMBER Type the test plan number that you would like to print and press the ENTER key If you do not know the test plan number you can first print the test plan directory using the instructions in section 3 5 2 The test plan will be printed on the thermal printer and you will be returned to the START UP menu A typical test plan printout is shown in Figure 13 Test plan elements are described in Table 4 REV1 7 2000 USER S MANUAL EET Y cnr lt 4 NUMBER OF TESTS KNEE LEEBE COMPANY APPARATUS TEST ING zx STAT I ON cCcA CUF Masses CC I FeCLTT MAITIN CT T MEEF r1ODEE L COMMENT S TEST TYPE 2 ExCIT RAT 4 0 TESTED TAP gt lt 2 gt gt lt 25 T EST NUMBEF A TEST YTG RANGE Soo v TEST CUR RANGE gt m lt FERAE PLATE RATIO 100 5 TST NOT E l T EUST NUMBSEF VEN VT wv PEE s gt lt RAT TESTED TAP 26 1 2628 T YTG RANGE Tea TT CUR RANGE 2 O A NeME PLATE RATIO Z200 5 TST NOT E Item N
12. 18 19 Table 3 Descriptions of Tabulated Test Results Elements Description Test record header information The EZCT 2000A X terminals taps that were selected for this test Test note for this particular test The test note can be up to 20 characters long Recorded excitation current readings on the CT secondary winding Recorded excitation test voltages applied to the CT secondary winding Impedance calculated at each data point The voltage current and impedance data points recorded on the graph grid marks Measured DC resistance value of CT under test ASA 10 50 knee point voltage and excitation current This is equivalent to the 10 50 and ANSI 10 50 knee point voltage and excitation current IEEE 30 knee point voltage and excitation current IEEE 45 knee point voltage and excitation current CT nameplate turns ratio Measured turns ratio Turns ratio percentage error Polarity of the CT Measured phase angle Excitation voltage used in CT turns ratio test Excitation current in turns ratio test Current ratio error table This information will be printed only if you selected YES for the CALC ERR VS BURDEN option when running a test See section 3 3 2 step h for details EZCT 2000A USER S MANUAL REV1 Hh HEB xe iam nee nt ker HHH CH Exe a Ss i Ee eee eee m
13. 2 RUN AUTONOMOUSLY Press the 2 key to run the test autonomously The following screen will be displayed CABLES WILL EMERGIZED START TO BEGIN Press the START key and the EZCT 2000A will start running the test per the test plan settings The screen will be updated with the test status REV1 EZCT 2000A USER S MANUAL When the test has finished the following screen will be displayed Press the 1 key YES to save the record The following screen will be displayed momentarily Then the following confirmation screen will be displayed Press any key to return to the START UP menu 3 UNLOAD TEST PLAN Press the 3 key to unload the test plan and run a test without a test plan This will unload the test plan from the working memory and bring up the standard RUN TEST menu Please see section 3 3 2 step b EZCT 2000A USER S MANUAL REV1 C The following screen will be displayed EHTER TEST 1 Tl TO POSITION ENTER TO ACCEPT Use the alpha numeric keys on the keypad to enter a test note and press the ENTER key d The following confirmation screen will be displayed showing the test parameters 21 PARAMETERS a START TO Press the START key to begin the test The EZCT 2000A will start performing the test per the test plan parameters When the f ee test has finished the following screen will be displayed
14. PLOT os DE Da DS GEESS ES O E E E tt E 3 _ S E S E EESE H LI THERE TET DE 0 CT EXCITATION LY MLA ALA 1A 101 UL Figure 7 Typical EZCT 2000A Graphic Report F Ht a eden EE 4 SS es MEM eT mum Ht 3 3 L I T b 2 7 4 FT AT 12 TI TT LAL AA TIE LL ELE EET ETT TEL ie 410 CY eS ee ee Ye E BR B a Ce a Se ae 2 es I d ee 1211 a oe a tr 7 ET E TTE DE 01a LOA 10A Figure 8 Typical EZCT 2000A Graphic Report with Multiple Plot Curves EACITATION PLOT NESS MARKER REV1 EZCT 2000A USER S MANUAL 3 4 Working With Test Records 3 4 1 Restoring and Printing a Test Record From Flash EEPROM You can restore a test record from the EZCT 2000A s Flash EEPROM to the working memory You can then print the restored test record on the unit s built in thermal printer To restore a test record a Start from the START UP menu 4 FUR TEST Ae 16 18 SETUP 1B 24123 5 TEST FLAHS 4 DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed
15. secondary winding as an auto transformer When using this method the effect of the shunt reactor winding is totally eliminated The turns ratio X1 X5 X2 X5 measured by the EZCT or any electronic TTR will be as follows V1 Ratio V2 H1 H2 Figure 25 From the name plate of the CT show in table below the turns ration can be calculated as follows 1200 5A X1 X5 1000 5A X2 X5 Ratio 1 5 240 Ratio 2 5 200 00 Calculated Ratio 1 20 EZCT 2000A USER S MANUAL REV1 A common practice for verifying the CT turns ratio in the field is to apply an AC voltage to the CT secondary full winding X1 X5 A volt meter can be used to verify the voltage drop across the CT terminals For example if a 120Vac voltage is applied to the X1 X5 of this CT the voltage reading across X2 X5 shall be expected as follows V X1 X5 _ 1200 _ 12 V X2 X5 1000 120v 2 12 V X2 X5 V x2 x5 100V H1 v42120V V2 100V H2 Figure 26 This method also eliminates the effect of the auto transformer or reactor windings REV1 2 2000 USER S MANUAL ALSTOM SHUNT REACTOR SERIAL NUMBER INSTRUCTION BOOK 111 583 5 0 PHASE 3 STANDARD COOLING TYPE FREQUENCY Hz INSULATING LIQUID NAPHTHENIC ASTM D 3487 88 MINERAL OIL CONTAINS NO PCB YEAR IMPEDANCE PER PHASE AT amp 0Hz AND 75 2373 2 OHMS CORF TYPE
16. t i WT M O 7 gun gm _ 4 1 2 1 BEA USER S MANUAL Vanguard Instruments Company Inc 1520 S Hellman Ave Ontario California 91761 USA 909 923 9390 June 2014 909 923 9391 Revision 1 4 EZCT 2000A USER S MANUAL REV1 SAFETY SUMMARY FOLLOW EXACT OPERATING PROCEDURES Any deviation from the procedures described in this User s Manual may create one or more safety hazards may damage the EZCT 2000A or cause errors in the test results Vanguard Instruments Company Inc assumes no liability for unsafe or improper use of the EZCT 2000A safety precautions provided in this manual must be observed during all phases of testing including test preparation test lead connection actual testing and test lead disconnection SAFETY WARNINGS AND CAUTIONS The EZCT 2000A can produce a voltage up to 2 000 Vac that can cause severe injury and or equipment damage Due to this reason the EZCT 2000A shall be used only by trained operators EZCT 2000A s X output terminals are rated to 2 000 Vac working voltage Any voltage above 2 000 Vac will damage the input circuitry Please see section 3 2 for further information devices under test shall be off line and fully isolated Never attempt to test any current transformer still connected to a circuit All current transformer terminals shall be isolated before conducting any test with the EZCT 2000A Always ground the EZCT 2000A to
17. 0 2 200 Vac Accuracy 1 0 of reading 1 volt 0 10A Accuracy 1 0 of reading 0 02A 0 8 999 0 196 1000 1999 0 396 2000 5000 196 0 360 degrees Accuracy 1 0 degree 100 micro ohms 10 ohms Accuracy 2 of reading 1 count 10 ohms Back lit LCD Screen 240 x 128 dot graphic 114mm x 64mm viewable in bright sunlight and low light levels Built in 4 5 inch wide thermal printer One RS 232C port 115k baud One USB port Windows XP Vista based CT Analysis software is included with purchase price One USB Flash drive interface port Flash drive not included Stores 140 test records Each test record may contain up to 10 sets of excitation resistance and ratio data Stores 128 test plans Each test plan can store 10 excitation test voltage and current settings Designed to meet UL 61010A 1 and CAN CSA C22 2 No 1010 1 92 standards Operating 10 to 50 C 15 F to 122 Storage 30 C to 70 C 22 F to 158 F One 20 foot X cable set One 35 foot H cable power cord One cable carrying duffel bag One year on parts and labor EZCT 2000A USER S MANUAL REV1 1 4 EZCT 2000A Controls and Indicators The EZCT 2000A s controls and indicators are shown in Figure 1 below A leader line with an index number points to each control and indicator which is cross referenced to a functional description in Table 2 The table describes the function of each item on the control p
18. 2000A s Flash EEPROM using the steps below a Start from the START UP menu ia EUH TEST Ba 16 1 eee PUP 18 24 25 5 TEST 4 DIAGHOSTIC Press the 3 key TEST PLANS b The following screen will be displayed LOAD TEST PLAN 2 UNLOAD TEST PLAN PLAH DIRECTORY 4 EXTRACT TEST PLAN Ja PRIHT TEST FLAH Sa ERASE TEST FLAH TO EL UU Press the 3 key PLAN DIRECTORY c The following screen will be displayed while the test plan directory is printed on the thermal printer 1 DIRECTORY The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000A s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 INTERNAL DIRECTORY da SET Dd Press the 1 key INTERNAL DIRECTORY Continue with the steps below REV1 2 2000 USER S MANUAL You will be automatically returned to the START UP menu after the directory printing is finished A typical Flash EEPROM test plan directory printout is shown in Figure 11 below TEST F L enr cot Fe MUOMBE OF cCoOMmMrParn tT ST AT I ON rir _ Comment gt TEST PLAN NUMBER OF STAT Ii OMN CIRCUIT mere MODEL Comment gt rest PLAN NUMBER OF COMPANY STATION CIRCUIT MEFR MODEL COMMENT e TEST PLAN NUMBER OF COMPANY STATI ON CIRCUIT MEF
19. ADTUSTED THO THIFDS Press any key to return to the START UP menu Disabling the Buried CT in Transformer Delta Option To disable the Buried CT in Transformer Delta option d b Start from the START UP menu RUM TEST SETUP TEST FLAWS 4 DIAGHOSTIC Press the 2 key SETUP The following screen will be displayed RECORD ID FRIHT RECORD RECORD DIRECTORY SAVE RES RECORD ERASE RECORD HEAT n 4 5 Press the 6 key NEXT PAGE LIUM EZCT 2000A USER S MANUAL REV1 C The following screen will be displayed Press the 2 key BURIED CT IN DELTA The following screen will be displayed Press the 2 key BURIED CT DELTA OFF The following screen will be displayed Press any key to return to the START UP menu REV1 7 2000 USER S MANUAL Vh 081121EZCT2kV667D Figure 15 Buried CT in a Delta Transformer Illustration 1 081121EZCT2kV667E Figure 16 Buried CT in a Delta Transformer Illustration 2 EZCT 2000A USER S MANUAL REV1 REV1 2 2000 USER S MANUAL 4 3 Setting the Clock To set the EZCT 2000A s internal clock a Start from the START UP menu FUH TEST A 15 18 SETUP 10 24 25 TEST 4 DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID FRIHT RECORD RECORD DIRECTORY SAVE RES RECORD ERAS
20. COMMENT 5 OPERATOR TA TESTED TAP 1 19 TST NOT E 5 DATA POINTS lt V gt a c OHMS gt 4 lt gt TG o O 450 O 0oo o 2 2 Soo D 5 22 L 5 569 22 ob 5 22 gt lt gt ex o 5 2 f 7os 5 6 2 lt lt 5 lt gt 77 gt gt 6 gt 793 6 5 3 o zZ 2 e55 lt 0c O lt 5 5 2 lt gt o oro 945 5 11 o 1566 L3 lt 4 oB 1 o AL 1 22 lt 1 Ss ozoe atum o B 1_ lt 5 5 1 lt O25 29 LL42 lt 15 0 0 soe 2 2 22222 1 o 5 lt 2 52 7 5 ob 22 ofc 5 1435 Obo os ogo 1 L569 5 1 21 125 LEOS 2 gt lt gt 2 2 lt 5 L495 6 TE 1 o 107S8 L38 gt L295 O HZZ o i 330 145 LoBoO lt 22 5 o 1666 ALS soos Bat 22 lt 1 L49 74o lt 22 o 23834 L52 635 1 22 o Le lt gt sic B o 361 Z Lem 4209 6 HZS 44 5 L56 Z 352 1 HZZO S5530 B P 5 lt gt 22 L59 4 232 S 1 22 1sco 5 avo B 5 22 1 1623 lt L59 TABULATED GRAPH POINTS CUF gt YTG CN
21. FLAN UNLOADED Press any key to return to the START UP menu EZCT 2000A USER S MANUAL REV1 4 0 4 1 CHANGING SETUP PARAMETERS Setting the Knee Point Marker Use the steps below to change the knee point marker for the excitation graph b Start from the START UP menu IEEE Ae 16 168 SETUP 10 24 25 FLAHS i DIAGHOSTIC Press the 2 key SETUP The following screen will be displayed RECORD ID RECORD RECORD DIRECTORY SAVE RES RECORD ERASE RECORD HEAT E Le Pl ee C Press the 6 key NEXT PAGE The following screen will be displayed BURIED CT DELTA KNEE POINT MARKER 4 DATA Press the 3 key KNEE POINT MARKER REV1 2 2000 USER S MANUAL d The following screen will be displayed IEEE DEGREE 2 IEEE 45 DEGREE LEC lix V mBXI Press either the 1 key 30 DEGREE the 2 key EEE 45 DEGREE or the 3 key IEC 10 gt 50 to select the desired knee point marker The knee point marker will be set and you will be returned to the START UP menu A graphic report showing the knee point marker is shown in Figure 14 i E EIE ES eee pon maner FTT aT SOI i D l gt LLL LLL E HU 1 TY H 0 Q0 Xn AA T H U Ou H SE mur
22. L CIRCUIT cir rier E LITCCT gt S J Srl 2 Comment lt gt no ccor4qr1d1E rAT RECORDO NUMBEF DecTE T I ME Ka gm Lo Ca Em oo aC 15 25 Lc rFJLt4r1E3E F2 OF TEST Loc cir aL STAT C IEFCCLUI T mF gt MOGEL gt SM SM an S F E C O F oS Te T I ME ue D 14 o 506 Se FJLJIFT1ES3E CF2 OF TEST STAT XI OM ST CI a MEF FIA F Srl MHO gt Figure 9 Typical Internal Test Record Directory Printout REV1 EZCT 2000A USER S MANUAL 3 4 5 Printing a Directory of Test Records Stored in a USB Flash Drive You can print a directory of all the test records in a USB Flash drive using the steps below b C Make sure the USB Flash drive is inserted in the EZCT 2000A s USB Flash drive port USB MEM port Then start from the START UP menu a FUH TEST Ae 16 168 SETUP 10 24 25 i TEST PLANS i DIAGHOSTIC Press the 2 key SETUP The following screen will be displayed RECORD ID RECORD RECORD DIRECTOR OHWESZRES RECORD ERASE RECORD HEST LH F3 pg
23. M hex Copy this file to the root of a USB Flash drive Make sure the EZCT 2000A s power if OFF and then insert the USB Flash drive containing the firmware file in the EZCT 2000A s Flash drive interface port USB MEM port While holding down the STOP key turn on the EZCT 2000A Continue to hold down the STOP key while the EZCT 2000A powers up After the initial logo screen the following screen will be displayed START HANDSHARE CF IHSERT DEY Continue to hold down the STOP key The firmware upgrade process will start and the following screen will be displayed ERASING ERT 4 LOADTHG CODE FROM FLASH DRY You can release the STOP key at this point The EZCT 2000A will continue the upgrade process and display the following screen REV1 2 2000 USER S MANUAL When the firmware upgrade has finished the following screen will be displayed You will hear a series of beeps as the unit re boots Once the unit has re booted the START UP menu will be displayed EZCT 2000A USER S MANUAL REV1 7 0 Appendix A Calculating Turns Ratio on a Shunt Reactor The Vanguard EZCT line of products use the voltage method to measure the turns ratio on current transformers A typical connection for a stand alone CT is shown in Figure 20 H1 H2 Figure 20 The EZCT applies a test voltage V1 to the CT secondary winding The induced voltage V2 is sensed through the CT prim
24. UP menu REV1 2 2000 USER S MANUAL 5 0 DIAGNOSTICS VERIFICATION AND TROUBLESHOOTING 5 1 Performing a Diagnostics Test The Diagnostics test mode displays the output voltage at the selected X leads V the voltage sensed by the leads Vp and the X voltage excitation current Ix These values can then be verified using an external volt meter and ampere meter To perform a diagnostic test a Start from the START UP menu TEST Ae 16 18 SETUP Taree SS TEST FLAWS DIAGHOSTIC a Press the 4 key DIAGNOSTIC b The following screen will be displayed SELECT Alma 1 84 al s2 HEST DH md PRO n Select the tap connection by pressing the corresponding key 1 4 If the tap connection is not listed press the 5 key to view the next page of options and then select the correct tap connection The following screen will be displayed SELECT VOLTAGE E SHAY cb 128 ZEB DH bei PRO z Select the maximum output voltage on the X terminals by pressing the corresponding key 1 5 EZCT 2000A USER S MANUAL 1 d The following screen will be displayed CAUTION CABLES WILL BE EHERDGIZELD ENTER TO CONTINUE Press the ENTER key to continue The following screen will be displayed and the Vy Vh and values will be continuously updated for 15 second
25. Verifying the EZCT 2000A s lx Sense Circuit Using an External Meter You can verify the excitation current 1 sensed by the EZCT 2000A by using an external RMS ampere meter Follow the steps below to verify the EZCT 2000A s sense circuit a Connect the X cables to a power resistor and an RMS ampere meter as shown in Figure 18 b Select the EZCT 2000A s Diagnostics mode see section 5 1 c Pressthe PAPER Contrast key to raise the V voltage d Verify the voltage displayed on the EZCT 2000A s LCD screen against the value displayed on the external RMS ampere meter e Press the STOP key to end the test POWER RESISTOR Li ps qe AMPERE METER PAPER A ONTRAST T 8 9 fv eaRs ruv wxvz hd EMERGENCY TURN OFF PUSH gt Vanguard Instruments Co Inc Ontario California USA Figure 18 EZCT 2000A Verification Test Connections REV1 7 2000 USER S MANUAL 5 4 Quickly Verifying the EZCT 2000A s Turns Ratio Circuit You can quickly verify the EZCT 2000 s turns ratio circuit by performing the following ratio test a Connect the X1 test lead to the H1 test lead as shown in Figure 19 b Connect the X2 test lead to the H2 test lead as shown in Figure 19 c Runaturns ratio test see section 3 3 2 d Observe the turns ratio test on the LCD screen The turns ratio should be 1 000 since the excitation voltage is the same as the sensed
26. a substation ground before connecting the test cables to a transformer DO NOT MODIFY TEST EQUIPMENT To avoid the risk of introducing additional or unknown hazards do not install substitute parts or perform any unauthorized modification to any EZCT 2000A test unit To ensure that all designed safety features are maintained it is highly recommended that repairs be performed only by Vanguard Instruments Company factory personnel or by an authorized repair service provider Unauthorized modifications can cause safety hazards and will void the manufacturer s warranty WARNING Do not remove test leads during a test Failure to heed this warning can result in electrical shock to personnel and damage to the equipment REV1 2 2000 USER S MANUAL TABLE OF CONTENTS CONVENTIONS USED IN THIS DOCUMENT oo nnn 1 L0 JNTRODUCTION a UNUS MM UM DD 2 1 1 General Description and Features nitri Sdn 2 L2 Furnished AtcessDEIDSu 4 L3 Jecnnieg lt 6 55 NU ibat 5 1 4 EZCT 2000A Controls and Indicators ioci iavras ku ea ter nhi ua Ea uoa da crm CFR rU TE VE 6 202 SETUP 5 Mas 8 2 41 Operating Voltages 8 22 LCD aean Cona aaa 8 ZS Prnter Paper 8 2 erne ER 8 20 OPERATING PROC
27. following screen will be displayed 00 EZCT 2000A USER S MANUAL RESTORE THUME DRIVE REC Type the record number that you would like to restore and press the ENTER key If you do not know the record number you can print a test record directory Please see section 3 4 4 for details f The following screen will be displayed while the record is being restored REZTORIHG THUME REC Gel PLEASE MAIT Once the record has been restored the record s graph will be displayed as shown below 10001 c TOO CT SATURATION PLOT Press any key to continue g The following screen will be displayed RECORD 881 RESTORED PRIHT RECORD 1 YES HO If you do not want to print the test record press the 2 key NO The test record will be restored to the working memory and you will be returned to the START UP menu If you would like to print the test record press the 1 key YES Continue to step h REV1 2 2000 USER S MANUAL h The following screen will be displayed Press the 1 key to print the full tabulated data and graphics results on the thermal printer After printing is finished you will be returned to the START UP menu Press the 2 key to print the test report and graphic results on the thermal printer without the excitation voltage and current data points After printing has finished you will be returned to the STA
28. 000A X output terminals are rated to 2 000 Vac working voltage Any voltage present at these terminals above 2 000 Vac may damage the X sense circuitry cause false readings or both An example of a typical situation where this may occur is shown in Figure 5 below Figure 5 Sample CT Name Plate For the above example CT the turns ratio between X1 X4 is 3150 to 1 The turns ratio between X1 X2 is 400 to 1 The turns ratio between X1 X4 and X1 X2 is 7 88 3150 400 If a test voltage of 300 Vac is applied to the X1 X2 terminals a voltage of 2 364 Vac 300 Vac x 7 88 will be induced at the X1 X4 terminals If all the test leads are connected to the EZCT 2000A and the excitation test is performed on the X1 X2 terminals the voltage induced at the X1 X4 terminals will exceed 2 000 Vac as the voltage across the X1 X2 terminals increases above 250 Vac A Flash Over condition may occur and damage the EZCT 2000A In this case the user should only connect the X1 X2 leads and run its excitation test then connect the X4 lead before running the X1 X4 excitation test REV1 EZCT 2000A USER S MANUAL 3 3 Performing Tests 3 3 1 Entering Test Record Header Information You can enter the test record header information before performing tests The record header includes identifying information such as the company station circuit model number etc Once the header information has been entered it will apply to all subsequent test records To enter
29. CIRCUIT CIRCUIT 1 FOSITIOH ENTER TO ACCEPT Type the circuit information using the alpha numeric keypad and then press the ENTER key f Thefollowing screen will be displayed To POSITION ENTER TO ACCEPT Type the manufacturer name using the alpha numeric keypad and then press the ENTER key g The following screen will be displayed MOTEL TL POSITION ENTER TO ACCEPT Type the model information using the alpha numeric keypad and then press the ENTER key 200 REV1 EZCT 2000A USER S MANUAL h The following screen will be displayed SERIAL HUMBER T TO FOSITIOH ENTER TO ACCEPT Type the serial number using the alpha numeric keypad and then press the ENTER key The following screen will be displayed COMMENTS amp To POSITION ENTER TO ACCEPT Enter any relevant comments using the alpha numeric keypad and then press the ENTER key The following screen will be displayed TA TL To POSITION ENTER TO ACCEPT Type the operator s name using the alpha numeric keypad and then press the ENTER key All header information will be saved and you will be returned to the START UP menu EZCT 2000A USER S MANUAL REV1 3 3 2 Performing Resistance Excitation and Ratio Tests The following procedure describes t
30. DESIGN SOUND LEVEL 50 lt 06 4 WINDING CONDUCTOR COPPER RATED VOLTAGE kV TEMPERATURES CORE AND COILS MASS 70768 Jib 32109 kg 345 MAXIMUM AMBIENT TEMPERATURE 40 45 AMBIENT TEMPERATURE OlL MASS 38821 2715071 TOP Gil ASE WINDING AVERAGE RISE RATED POWER MVA _ CEA OIL VOLUME CEE gai 23836 i TANK AND FITTINGS MASS 41006 ip 718600 kg SHUNT REACTOR TERMINALS UME H2 M3 NEUTRAL H RATED VOLTAGE v RATED CURRENT 380 se O SHIPPING WITHOUT Oi masa 1807511 45700 kg COMPLETE REACTOR MASS 160695 Jib 72890 Jkg RATIO TERMINAL 5000 5 14000 58 CONSERVATOR AND RADIATORS WITHSTAND FULL VACUUM WARRANTY PERIOD 60 MONTHS AFTER ENERGIZATION OR 66 MONTHS AFTER DELIVERY 2 ALSTOM Grid Energia Lido AV GUILHERME SCHELL 11500 CANOAS RS CNR 05 356 949 0008 08 MADE IN BRAZIL Figure 27 1 mA gt peste 2 Vanguard Instruments Company Inc 1520 S Hellman Ave e Ontario CA 91761 USA Phone 909 923 9390 e Fax 909 923 9391 www vanguard instruments com Copyright 2014 by Vanguard Instruments Company Inc EZCT 2000A User s Manual e Revision 1 4 e June 4 2014 e TA
31. E RECORD HEAT ee u u Press the 6 key NEXT PAGE c The following screen will be displayed SET TIME BURTED CT DELTA POIHT MARKER EAH DATA wks LE PJ e Press the 1 key SET TIME d The following screen will be displayed EHTEE Enter the month date year hours minutes and seconds in 24 hour format using the alpha numeric keypad When the last digit is entered the clock will be set and you will be returned to the START UP menu EZCT 2000A USER S MANUAL REV1 4 4 Printing Raw Memory Buffer Data You can print the raw data from the EZCT 2000A s memory buffer for diagnostic purposes This will print a table of current and voltage values stored in the unit s working memory To print the raw buffer data a Start from the START UP menu a FUH TEST Ae 16 168 SETUP 10 24 25 i TEST PLANS i DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID FRIHT RECORD RECORD DIRECTORY SAVE RES RECORD ERASE RECORD HEAT ee C Press the 6 key NEXT PAGE The following screen will be displayed TIME BURIED CT DELTA i KHEE MARKER 4 PRINT RAWH DATA Press the 4 key PRINT RAW DATA The raw buffer data will be printed and you will be returned to the START
32. EDURES 10 S 7 20 00 CONNECHONS NA 10 3 2 EZCT 2000A X Input Voltage Warning menn 12 SS PENADE Ee tmm 13 3 3 1 Entering Test Record Header Information 40 024 4 1 6 13 3 3 2 Performing Resistance Excitation and Ratio 16 SA Working With 225 eoe suo Ge load sso IIa N E 27 3 4 1 Restoring and Printing a Test Record From Flash EEPROM 27 3 4 2 Restoring and Printing a Test Record From a USB Flash Drive 31 3 4 3 Printing a Restored Test Record 5i ces ve cies Fa abun 34 3 4 4 Printing a Directory of Test Records Stored in the EZCT 2000A s Memory 36 3 4 5 Printing a Directory of Test Records Stored in a USB Flash Drive 39 3 4 6 Copying Test Records to a USB Flash 41 3 4 7 Erasing Test Records From the Flash EEPROM 44 3 4 8 Erasing Test Records From a USB Flash Drive 47 25 50 3 5 1 Extracting the Test Plan From a Test Record
33. RASE THUME DRY Press the 1 key ERASE INTERNAL REC The following screen will be displayed REV1 2 2000 USER S MANUAL ERASE RECORD la EFASE SIHGLE REC 2 ERASE ALL RECORDS Continue with the steps below 1 ERASE SINGLE REC Press the 1 key if you would like to erase a single record The following screen will be displayed ERASE RECORD HLIMBER Type the record number to be erased and press the ENTER key e Youcan press the STOP key to cancel the process e f you do not know the record number you can first print a test NOTES record directory using the instructions in section 3 4 4 The following screen will be displayed momentarily ERASING RECORD HUMBER 81 WAIT Then the following confirmation screen will be displayed RECORD HUMBER 1 ERASED Press any key to return to the START UP menu PO ll EZCT 2000A USER S MANUAL REV1 2 ERASE ALL RECORDS Press the 2 key if you would like to erase all of the test records stored in the EZCT 2000A s flash EEPROM The following confirmation screen will be displayed ERASE ALL RECORDS YOU SURE ENTER TO COMTIHUE If you would like to cancel the erasure process press the STOP key No records will be erased and you will be returned to the START UP menu Press the ENTER key to continue with the erasure process The following screen will be
34. RT UP menu EZCT 2000A USER S MANUAL REV1 3 4 3 Printing a Restored Test Record You can print a test record at the time that it is restored from the Flash EEPROM see section 3 4 1 or you can restore it to the working memory and print it later To print the current test record in the working memory Start from the START UP menu ia EUH TEST O 2 SETUP Brizu i9 2 TEST PLANS 4 DIAGHOSTIC Press the 2 key SETUP The following screen will be displayed a FEC RD I PRINT RECORD a RECORD DIRECTORY 4 SAVE EES RECORD ERASE RECORD 2 HEST Press the 2 key PRINT RECORD The following screen will be displayed PRINT OFTIONS FULL DATA DATA If there is no test record in the working memory the following screen will be displayed NOTE SHOTS TO PRIHT Press any key to return to the START UP menu Please see section 3 4 1 for instructions on how to restore a test record REV1 2 2000 USER S MANUAL Press the 1 key to print the tabulated data and graphics results on the thermal printer The test record will be printed on the thermal printer and you will be returned to the START UP menu Press the 2 key to print the test report and graphic results on the thermal printer without the excitation voltage and current data points The test record will be printed on the thermal printer and you w
35. SINGLE FLAW 2 ERASE ALL PLAS Continue with the steps below 1 ERASE SINGLE PLAN Press the 1 key if you would like to erase a single test plan The following screen will be displayed ERASE TEST FLAH HUMBER Type the test plan number that you would like to erase and press the ENTER key e You can press the STOP key to cancel the process e If you do not know the test plan number you can print a test NOTES plan directory using the instructions in section 3 5 2 The selected test plan will be erased and the following screen will be displayed TEST FLAW HUMBER 1 ERASED Press any key to return to the START UP menu 2 ERASE ALL PLANS Press the 2 key if you would like to erase all test plans The following screen will be displayed EZCT 2000A USER S MANUAL 1 If you would like to cancel the erasure process press the STOP key No test plans will be erased and you will be returned to the START UP menu Press the ENTER key to continue with the erasure process The following screen will be displayed while the test plans are being erased The following screen will be displayed after all of the test plans have been erased Press any key return to the START UP menu REV1 2 2000 USER S MANUAL 3 5 6 Erasing Test Plans From a USB Flash Drive To erase one or all test plans stored on a USB Flash drive Make sure the USB Flash drive is inserted in
36. W IHTERHBALL i YES 2 HO 1 YES Press the 1 key if you would like the loaded test plan to be also saved in the EZCT 2000A s Flash EEPROM Any existing test plans in the EZCT 2000A s Flash EEPROM will not be over written The EZCT 2000A will automatically assign a new test plan number and store the test plan in the next available memory location The following screen will be displayed TEST PLAN SAVED Press any key to return to the START UP menu 2 NO Press the 2 key if you do not want to save the loaded test plan in the EZCT 2000A s Flash EEPROM It will be loaded into the working memory and you will be returned to the START UP menu EZCT 2000A USER S MANUAL REV1 3 5 9 Running a Test Using a Loaded Test Plan Once a test plan has been loaded into the working memory see sections 3 5 7 and 3 5 8 for directions it can be used to run a test To run a test using a loaded test plan a Make sure a test plan has been loaded into the working memory and then start from the START UP menu TEST 0216 10 2a te UF 18 24 25 TEST PLAS 4 DIAGHOSTIC Press the 1 key RUN TEST b The following screen will be displayed this screen will be displayed only if a test plan has been loaded first TEST PLAN LOADED RUM WITH PROMPTS 2 RUM AUTOMOMOUSL Y a UNLOAD PLAN 1 RUN WITH PROMPTS Press the 1 key to run the test with prompts Continue to step c
37. and Features The EZCT 2000A is Vanguard s third generation microprocessor based current transformer test set The EZCT 2000A can perform the current transformer CT excitation test measure the winding resistance and CT current ratio automatically All of the EZCT 2000A s test leads can be connected to the CT output terminals X1 X2 X3 X4 and X5 eliminating the need for lead switching during testing Test voltage output is automatically raised and lowered by the EZCT 2000A without any operator intervention With up to 2000 Vac excitation test voltage available the EZCT 2000A can easily perform excitation tests on very large CT s Excitation Test The CT excitation test is performed using the ANSI IEEE C57 13 1 IEC 60044 1 test method The test voltage range for the CT excitation test 50 Vac 300 Vac 500 Vac 1200 Vac or 2000 Vac can be selected and then the test voltage is raised and lowered automatically by the EZCT 2000A The excitation test voltage and current data is collected and stored in the unit s internal memory Any of the 10 possible combinations of X1 to X5 can be tested since all of the unit s test leads can be connected to all of the CT output terminals at the same time Up to 10 excitation tests can be stored in one record Once the test is completed test results can be printed and excitation curves can be plotted on the built in 4 5 inch wide thermal printer CT Ratio and Polarity Test The EZCT 2000A determines
38. anel The purpose of the controls and indicators may seem obvious but users should become familiar with them before using the EZCT 2000A Accidental misuse of the controls will usually cause no serious harm Users should also be familiar with the safety summary found on the front page of this User s Manual 110 120Vac 12A 50 60Hz D Vanguard Instruments Co Inc Figure 1 EZCT 2000A Controls and Indicators REV1 7 2000 USER S MANUAL Item Number 1 5 ON 11 12 13 14 15 16 17 Table 2 Functional Descriptions of EZCT 2000A Controls and Indicators Panel Markings X1 X2 X4 X5 H GROUND 110 120 Vac 12A 50 60Hz HIGH VOLTAGE PRESENT EMERGENCY TURN OFF PUSH USB USB MEM RS 232C Functional Description Current transformer excitation voltage connectors Each set of connectors contains a test voltage connector and sensing connector The EZCT 2000A s X output terminals are rated to 2000 Vac working voltage Any voltage above 2000 Vac will damage the input circuitry Current transformer primary input test cable connector Grounding stud AC receptacle Back lit LCD Screen 240 x 128 dot graphic 114mm x 64mm Power switch with built in circuit breaker Rugged alpha numeric membrane keypad LED warning indicator that is illuminated when high voltage is present Emergency turn off switch Built in 4 5 inch wide thermal printer USB PC interface USB Fl
39. ary winding In this case a single conductor is used By definition the turns ratio is the voltage ratio V1 Ratio V2 REV1 2 2000 USER S MANUAL Figure 21 shows a typical connection of a CT mounted on the primary bushing of a single phase transformer When the voltage V1 is introduced to the CT s secondary winding there is an induced voltage V3 on the primary winding of this single phase transformer Since the only access to the transformer is between terminals H1 HO The V3 voltage will be included and the turns ratio will be V1 V2 V3 Ratio 1 V2 X1 V3 H2 X2 Figure 21 Ideally we would like to eliminate the V3 voltage and only see the V2 voltage If the induced V3 voltage on the transformer winding cannot be eliminated the turns ratio measured will be wrong EZCT 2000A USER S MANUAL REV1 Since this is a single phase transformer and the transformer secondary winding is accessible the user can apply a jumper to short out the transformer secondary winding as shown in Figure 22 By shorting out the transformer secondary winding the user can eliminate most of the V3 voltage V3 0V Now the turns ratio will be V1 Ratio V2 H1 Install ov Jumper P H2 X2 Figure 22 REV1 2 2000 USER S MANUAL Figure 23 shows a CT mounted on an auto transformer This configuration is very similar to the CT mounted on a single phase transformer the main dif
40. ash drive interface port RS 232C PC interface Baud rate is set for 115KB 8 data bits 2 stop bits EZCT 2000A USER S MANUAL REV1 2 0 PRE TEST SETUP 2 1 Operating Voltages The EZCT 2000A s operating voltage is preset at the factory for 100 120 Vac 50 60 Hz or 200 240 Vac 50 60 Hz 2 2 LCD Screen Contrast Control To increase the LCD screen contrast press and hold the PAPER Contrast key for two seconds Release the button when the desired contrast level has been reached To decrease the LCD screen contrast press and hold the PAPER v Contrast key for two seconds Release the button when the desired contrast level has been reached 2 3 Printer Paper Control To advance the thermal printer paper press and release the PAPER Contrast key To retract the thermal printer paper press and release the PAPER v Contrast key 2 4 Printer Paper The EZCT 2000A s built in thermal printer uses 4 5 inch wide thermal paper for printing test results To maintain the highest print quality and to avoid paper jams the use of thermal paper supplied by Vanguard Instruments Company is highly recommended Additional paper can be ordered from the following sources Vanguard Instruments Co Inc 1520 S Hellman Avenue Ontario CA 91761 Tel 909 923 9390 Fax 909 923 9391 Part Number VIC TP 4 paper BG Instrument Co 13607 E Trent Avenue Spokane WA 99216 Tel 509 893 9881 Fax 509 893 9803 Part Number VIC TP 4 pap
41. ation Test 86 Figure 19 EZCT 2000A Turns Ratio Verification Test 5 87 2 92 93 205 94 aues E E E 95 96 A 97 98 22 99 T 99 a REV1 2 2000 USER S MANUAL CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions A key or switch on the EZCT 2000A is indicated as KEY and SWITCH Menu options are referenced as MENU OPTION Screen and menu names are referenced as SCREEN MENU The terms test record and test shot are used interchangeably EZCT 2000A LCD screen output is shown as When instructions are provided the menu item that should be selected is shown in bold as shown below option 3 should be selected Warning messages are indicated as Important notes are indicated as le EZCT 2000A USER S MANUAL REV1 1 0 INTRODUCTION 1 1 General Description
42. cn 4 Press the 3 key RECORD DIRECTORY The following screen will be displayed 1 INTERHAL DIREECTURY 2 THUMB DRIVE DIR Press the 2 key THUMB DRIVE DIR The following screen will be displayed while the directory is printed FEIHTIHG DIRECTORY When printing is finished you will be returned to the START UP menu A sample directory printout is shown in Figure 10 DIM 0 EZCT 2000A USER S MANUAL REV1 T HUME oe F E C a DOA T I MAME o E Scot a3 353 11 FL A oor TESTS 2 ST I ee 1 mer Sri 21 THUME E DF F IL E ndexrt1E REC JI OAT T I ME E taxa L3 eo oF T EST STAT I OM ee CIECHI T C I F 2 rir r E mr COMAENT S MO COMAN T HUME F IIL E nrJea r1E DODATE TIME Ocec ic oc 10o NUMBER OF TESTS STATION LAB CIRCUIT CIR MEF 7 AMN G UOU A F O MODEL SScrscoom S N sN 1 COMMENTS NO COMMENT Figure 10 Typical USB Flash Drive Record Directory Printout REV1 2 2000 USER S MANUAL 3 4 6 Copying Test Records to a USB Flash Drive You can easily test records stored in the EZCT 2000A
43. displayed while the records are being erased ERASING RECORDS PLEASE WAIT The following screen will be displayed after all of the test records have been erased RECORDS ERASED Press any key to return to the START UP menu REV1 EZCT 2000A USER S MANUAL 3 4 8 Erasing Test Records From a USB Flash Drive You can erase individual or all test records stored in a USB Flash drive To erase a test record a Make sure the USB Flash drive is inserted in the EZCT 2000A s USB Flash drive port USB MEM port Then start from the START UP menu a FUH TEST Ae 16 168 SETUP 10 24 25 i TEST PLANS i DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID RECORD RECORD DIRECTOR SAVE RES RECORD ERASE RECORD HEST Sun E bei BIG u u Press the 5 key ERASE RECORD c The following screen will be displayed 1 ERASE IHTERHAL REC 2 ERASE THUMB DEY Press the 2 key ERASE THUMB DRV REC EZCT 2000A USER S MANUAL REV1 d The following screen will be displayed 1 ERASE SINGLE REC Press the 1 key ERASE SINGLE REC if you would like to erase a single record The following screen will be displayed Type the record number to be erased and press the ENTER key The following screen will be displayed Press any key to continue The following screen will be displayed
44. e restored to the working memory and you will be returned to the START UP menu If you would like to print the test record press the 1 key YES Continue to step d SCROLL TO SELECT Press the 2 key if you would like to scroll through a directory of the stored test records The following screen will be displayed RECORD DIRECTORY UPU SCROLL FHI TO SCROLL RMS Press the PAPER Contrast button or the PAPER v Contrast key to display the next or previous test record respectively The test record information will be displayed as shown Ti Heel 161 18 Ss TESTS LAE CIR 1 AEE SH 1 When you have located the test record that you would like to restore press the ENTER key The test record s graph will be displayed as shown below 7 100 CT SATURATION PLOT EZCT 2000A USER S MANUAL REV1 Press any key to continue The following screen will be displayed pote p DTE EP SS ERES RECORD If you do not want to print the test record press the 2 key NO The test record will be restored to the working memory and you will be returned to the START UP menu If you would like to print the test record press the 1 key YES Continue to step d d The following screen will be displayed OF TIONS 1 FULL DATA 2 ABBREVIATED DATA Press the 1 key to print the tabulated data and graphics results on the t
45. ed to the START UP menu Press the ENTER key to continue with the erasure process The following screen will be displayed while the test plans are being erased REV1 7 2000 USER S MANUAL The following screen will be displayed after all of the test plans have been erased from the USB Flash drive Press any key to return to the START UP menu EZCT 2000A USER S MANUAL REV1 3 5 7 Loading a Test Plan from the EZCT 2000A s Flash EEPROM To use a test plan for running a test it must first be loaded into the working memory To load a test plan from the EZCT 2000A s Flash EEPROM into the working memory a Start from the START UP menu ia EUH TEST Ba 16 1 eee PUP 18 24 25 5 TEST 4 DIAGHOSTIC Press the 3 key TEST PLANS b The following screen will be displayed LOAD TEST PLANH 2 UNLOAD TEST PLAN a PLAN DIRECTORY 4 EXTRACT TEST PLAN Ja PRIHT TEST FLAH Sa ERASE TEST FLAH TO THUME HB dE n ss Press the 1 key LOAD TEST PLAN The following screen will be displayed LOAD TEST HLIMBER The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000A s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 INTERNAL STORAGE da 1 DRIVE Press the 1 key INTERNAL STORAGE The following screen will be displayed REV1 7 2000
46. er REV1 2 2000 USER S MANUAL 2 5 Replacing the Thermal Printer Paper The roll of thermal paper is housed inside a dispenser underneath the printer cover To replace the paper follow the steps below e Unscrew the two large printer cover screws and remove the printer cover e Remove the leftover thermal paper roll from the paper holder e Unroll the new thermal paper roll e Feed the thermal paper into the slot between the paper pocket and the rubber roller The printer will automatically pull the paper under the thermal head e Place the paper roll into the paper holder e Lift the thermal head and align the thermal paper if necessary e Re install the printer cover 2 6 Computer Interface Ports The EZCT 2000A features one USB and one RS 232C PC interface port A Windows based Current Transformer Analysis software application is supplied with the EZCT 2000A For further information please see the EZCT 2000 Software User s Manual EZCT 2000A USER S MANUAL REV1 3 0 OPERATING PROCEDURES 3 1 EZCT 2000A Cable Connections Always connect the EZCT 2000A to the substation ground before connecting any test cables The EZCT 2000A is supplied with one 20 foot X cable set and one 35 foot H cable The X cable connections are required to run the current transformer excitation test The H and X cable connections are required to run the transformer turns ratio test A typical excitation and ratio test connection is s
47. ference being that the secondary winding is part of the primary winding The turns ratio in this case will be V1 V1 Ratlo V24V3 V2 S V1 V4 1 V3 X1 Jumper 0 0 Figure 23 By shorting out the transformer s secondary winding X1 to 0 0 eliminate the voltage induced from X1 to HO XO The voltage V3 cannot be eliminated and will create an error in the CT turns ratio measurement The amount of error depends on the amount of turns of the secondary windings The alternative method to verify the CT turns ratio is shown in Figure 25 and Figure 26 EZCT 2000A USER S MANUAL REV1 Figure 24 show a CT mounted on a typical shunt reactor This configuration is very similar to the CT mounted on a single phase transformer the main difference being the lack of the secondary winding The turns ratio in this case will be Ratio V2 V3 Figure 24 Since there is no secondary winding on the shunt reactor the V3 voltage cannot be eliminated from the connection The turns ratio measurement from using this method will always have some built in error The amount of error depends on the size of the reactor winding and the number of turns on the CT s secondary winding The alternative method to verify the CT turns ratio is shown in Figure 25 and Figure 26 REV1 2 2000 USER S MANUAL Figure 25 show a CT with 5 taps The turns ratio of the CT can be measured by treating the CT
48. he general steps for performing excitation resistance and ratio tests a When the EZCT 2000A is turned on it will first go through a start up cycle and load the firmware Then the START UP menu will be displayed as shown below TEST 0214 10 24 ele UF 18 24 25 FLANS 4 DIAGHOSTIC Press the 1 key RUN TEST to start a test b The following screen will be displayed RES EXCIT BATIO EACITATION OHLY RATIO OHLY FESISTAHCE ERCIT EH Ee bei pP a Select the test type by pressing the corresponding key 1 5 c The following screen will be displayed ELECT E PIE z m HES T PAC 15 Select the tap connection by pressing the corresponding key 1 4 If the tap connection is not listed press the 5 key to view the next page of options d If the selected test included an excitation test the following screen will be displayed SELECT VOLTAGE ERHGE E ESSE TZAR TARH m 4 Select a test voltage range by pressing the corresponding key 1 5 REV1 2 2000 USER S MANUAL e If the selected test included an excitation test the following screen will be displayed Select the maximum test current for the excitation test by pressing the corresponding key 1 6 CT f Ifthe selected test included a ratio test the following scree
49. he short directory option prints the last 10 records stored in the EZCT 2000A s Flash EEPROM The short directory listing will be printed on the thermal printer and you will be returned to the START UP menu EZCT 2000A USER S MANUAL REV1 TEST DIRECT OY RECORDO NUMBER rf DAT eT ME SoS ors Se F NUnmMeaere OF TEST S 2 STAT I OMN L CIRCUIT c IF MODEL SmI Srl CoMmMnmoLriT ao ccorir31E rAT RECORDO NUMA ODAT T I ME oS ua OG CES PHUT EBG E F OF TESTS STAT Ii OMN Lee C IFECCLUOITTOT C I a MHE A Z O 0O cnr Sri C oOr1dr1E raT gt ao CCr1r1E rT RECORDO FJLIFESE E T I ME ara Em 0c LS eL 1 OF TEST LAB CI a1 STAT ror MFR VANGUARD MODEL SSctr coonm SAN sN COMMENTS NO COMMENT RECORDO T I ME oS X E o7 CO 35 OSS MUOU B E F OF TESTS AL STAT I OMN L C IFeCCLU IT T C Ir Fe 1 rier G Sl Srl i C CFIFAESDPT mic Conner T RECORDO NUMEBEBEF OAT eT I ME lt gt CC EM Lc 45 5 OF TESTS STAT I OMN
50. hermal printer The test record will be restored to the working memory and will be printed on the thermal printer and then you will be returned to the START UP menu Press the 2 key to print the test report and graphic results on the thermal printer without the excitation voltage and current data points The test record will be restored to the working memory and will be printed on the thermal printer and then you will be returned to the START UP menu REV1 EZCT 2000A USER S MANUAL 3 4 2 Restoring and Printing a Test Record From a USB Flash Drive You can restore a test record from a USB Flash drive to the EZCT 2000A s working memory using the steps below a Make sure the USB Flash drive containing the test record s is inserted in the EZCT 2000A s USB Flash drive port USB MEM port Then start from the START UP menu FUH TEST iG ea 59 29 i TEST PLANS i DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID a FRIHT RECORD RECORD DIRECTORY SAVYE RES RECORD ERASE RECORD HEST Je pek Press the 4 key SAVE RES RECORD The following screen will be displayed 1 RESTORE RECORD da LUPY THUME Press the 1 key RESTORE RECORD d The following screen will be displayed 1 IHTERHAL STORAGE 2 DEIVE Press the 2 key THUMB DRIVE e The
51. hown in Figure 2 Transformer bushing CT connections for Delta and Y transformers are shown in Figure 3 and Figure 4 respectively 7 optional ground JIN 2 DUE E AU HIGH VOLTAGE B TOP EMERGENCY TURN OFF PUSH UY Vanguard Instruments Co Inc Ontario California USA Figure 2 Typical EZCT 2000A Excitation and Ratio Test Cable Connection REV1 7 2000 USER S MANUAL 0 NOTE 1 JUMPER INSTALLATION ON SECONDARY WINDING H1 JUMPER EZCT CABLES TYP 3 PLACES H2 1 amp 2 x2 2 PHASE BUSHING CT 1 9 A PHASE C PHASE BUSHING CT BUSHING CT Hie H1 H2 EZCT EZCT X1 amp X2 X1 amp X2 EZCT EZCT 041122ATRTO1 Figure 3 Bushing CT Connection on Delta Transformer 9 JUMPER JUMPER CABLES CABLES TYP 3 PLACES TYP 3 PLACES H1 EZCT X1 amp X2 NOTES EZCT X2 1 JUMPER INSTALLATION ON PRIMARY WINDING e X1 amp X2 EZCT f B PHASE HRF S BUSHING CT s H2 xi 2 p d xi 1 1 H2 A L 1 amp X2 2 BUSHING CT H1 H2 EZCT EZCT 2 2 2 A RED y PHASE S H1 BUSHING CT EZCT 041122ATRTO2 Figure 4 Bushing CT Connection on Y Transformer EZCT 2000A USER S MANUAL REV1 3 2 EZCT 2000A X Input Voltage Warning The EZCT 2
52. ill be returned to the START UP menu EZCT 2000A USER S MANUAL REV1 3 4 4 Printing a Directory of Test Records Stored in the EZCT 2000A s Memory You can print a directory of all the test records stored in the EZCT 2000A s Flash EEPROM using the steps below a Start from the START UP menu RUM TEST SETUP sa PLANS 4 DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed ID a PRIHT FECORD RECORD DIRECTORY 4 SAVE RES RECORD a ERASE RECORD HEST Press the 3 key RECORD DIRECTORY c The following screen will be displayed DIRECTORY la FULL DIRECTORY da SHORT DIRECTORY The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000A s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 INTERNAL DIRECTORY 2 THUMB DEIVE DIE Press the 1 key INTERNAL DIRECTORY The following screen will be displayed REV1 7 2000 USER S MANUAL Press the 1 key to print a full directory listing of all the test records stored in the EZCT 2000A s Flash EEPROM The directory listing will be printed on the thermal printer and you will be returned to the START UP menu A sample directory listing printout is shown in Figure 9 Press the 2 key to print a short directory listing of the stored test records T
53. ill then be displayed REV1 EZCT 2000A USER S MANUAL TEST When the testing is finished the test results graph will be displayed inn 1n 1 f mi Press any key on the keypad to continue The following screen will be displayed TEST RESULTS 2 HO Press the 1 key YES if you would like to print the test results The test results will be printed on the thermal printer A typical EZCT 2000A tabulated test report printout is shown in Figure 6 Typical graphic reports are shown in Figure 7 and Figure 8 Press the 2 key NO if you do not want to print the test results p The following screen will be displayed TESTE a HO Press the 1 key YES to keep the test results CO EZCT 2000A USER S MANUAL REV1 The following screen will be displayed Press any key to continue The following screen will be displayed Press the 2 key NO s The following screen will be displayed Press the 1 key YES to save the record The following screen will be displayed momentarily REV1 7 2000 USER S MANUAL t The following confirmation screen will then be displayed Press any key to return to the START UP menu EZCT 2000A USER S MANUAL REV1 EXCITATION TEST RESULTS COMPANY VANGUARD STAT I ON LAB CIRCUIT MER MODEZL Oc SAN 933 1
54. ith links for the requested files Fields in RED are required fields Thank you Name EMail Company Phone Comments 19140 Enter the security code shown above in the field below Circuit Breaker Timers Product PC Firmware Software User s Spanish Product Serial Number Software Manual Manual Manual Demo CBPS 300 O 3500 O SS ADBXI creso O Fill out all required fields marked with red labels and then click on the Firmware checkbox to the right of the EZCT 2000A label Then fill out the serial number field on the right Click on the Submit button once all form fields have been filled out The following confirmation page will be displayed EZCT 2000A USER S MANUAL 1 REQUEST SOFTWARE MANUAL DOWNLOADS We have received your download request an email will be sent to you with the download links within the next 24 hours Thank you You will also receive an email confirming the receipt of your download request Once your request has been received you will receive a second email usually within 1 2 business hours containing a download link for the firmware file Click on this link and download the firmware file to your computer The downloaded file will be in ZIP compressed format Unzip this file to an empty directory you can use a utility like Winzip 7Zip Winrar etc Once un compressed you should see a file named EZCT2A
55. mer windings opposite side of CT windings is not shorted Suggested Solution Check CT shorting screws e Check X lead connections e Check the CT terminal connection e Raise the excitation voltage setting in the test plan e Re run the excitation test e You quickly verify if the CT was de magnetized by looking at the last excitation graph e Remove X cables from the EZCT 2000A and the CT terminals Check cable integrity using Ohm Meter Check the V cable connection e Check the V cable integrity with an Ohmmeter e SeeFigure 4 REV1 EZCT 2000A USER S MANUAL 6 0 UPGRADING FIRMWARE The EZCT 2000A s firmware is user upgradeable You can download the latest firmware from the Vanguard Instruments Company web site at http www vanguard instruments com Use the steps below to download and install the latest EZCT 2000A firmware a Visit the Vanguard web site at http www vanguard instruments com and click on the Downloads button Company Products Contact Data Sheets Software Versions Downloads Product Demos Support b You will be taken to the Downloads page and presented with a Download Request Form REQUEST SOFTWARE MANUAL DOWNLOADS Please select the check boxes for the items you would like to download For each selected item please be sure to provide your products serial number Once we receive your download request you will receive an email w
56. n will be displayed 1 YES Press the 1 key if you would like to enter the CT nameplate values The following screen will be displayed Type the first number using the keypad You can press the CLEAR key to restart a field entry if necessary Press the ENTER key The following screen will be display ed EZCT 2000A USER S MANUAL REV1 PLATE RATIO PLATE RATIO led ALA 1988 5 6 Type the second number using the keypad and then press the ENTER key Continue to step g 2 NO Press the 2 key if you do not want to enter the CT nameplate values Continue to step g g The following screen will be displayed TEST 1 TL To POSITION EHTER TO ACCEPT Use the alpha numeric keys on the keypad to enter a test note The test note field is 20 characters long One test note can be saved for each test When pressing a key the corresponding number on the key will be displayed first Pressing the key again will display the first letter on the key Pressing the key again will display the second letter on the key For example to type the letter A you must press the 2 key twice To erase the character at the cursor position press the CLEAR key Press the PAPER Contrast button to move to the next character Press the PAPER v Contrast key to move to the previous character Press the ENTER key when you are done typing the note h The following scree
57. n will be displayed if the selected test included a resistance test CALC VS BURDEN 2 MO Press the 1 key YES Selecting this option will print the current ratio error table as part of the tabulated test results Please see item 19 in Figure 6 i Thefollowing screen will be displayed REV1 2 2000 USER S MANUAL If you had selected a test current greater than 1 Amp in step e the following screen will be displayed NOTE SATURATION CLE WILL BE REDUCED TO 1 PRESS AMY FEY 2 Press any key to continue ENTER BURDEN Type the burden value using the keypad and then press the ENTER key The following screen will be displayed ENTER COS Ce 1 882 Type the Cos value using the keypad and then press the ENTER key The following screen will be displayed RATED SECONDARY CUR 1 Select the rated secondary current pressing the 1 key 5A or 2 key 1 EZCT 2000A USER S MANUAL REV1 l Thefollowing screen will be displayed showing a summary of the test parameters Press the START key to start the test m If the selected test included a resistance test the following screen will be displayed momentarily The following screen will then be displayed n Ifthe selected test included a ratio test the following screen will be displayed momentarily The following screen w
58. on is provided with each EZCT 2000A This software can be used to retrieve test records from the EZCT 2000A create test plans download test plans to the EZCT 2000A and can also be used to run CT tests from the PC Tabulated test records can be exported in Microsoft Excel format EZCT 2000A USER S MANUAL REV1 1 2 Furnished Accessories The EZCT 2000A comes furnished with the following e 1 Power e 1 20 Cable Set e 135 foot H Cable e One RS 232C serial cable e One USB cable e Ground Cables e Duffel bag e Transportation Case REV1 2 2000 USER S MANUAL 1 3 Technical Specifications Table 1 EZCT 2000A Technical Specifications TYPE PHYSICAL SPECIFICATIONS INPUT POWER MEASUREMENT METHOD TEST OUTPUT VOLTAGES VOLTAGE READING RANGE CURRENT READING RANGE CURRENT RATIO RANGE PHASE ANGLE MEASUREMENT RESISTANCE READING RANGE DISPLAY PRINTER COMPUTER INTERFACES PC SOFTWARE EXTERNAL DATA STORAGE INTERNAL TEST RECORD STORAGE INTERNAL TEST PLAN STORAGE SAFETY ENVIRONMENT CABLES WARRANTY Portable current transformer test set 16 8 W x 12 6 H x 14 D 42 7 cm x 32 0 cm x 35 6 cm Weight 60 Ibs 27 2 Kg 100 120 Vac or 200 240 Vac factory pre set 50 60 Hz ANSI IEEE C57 12 90 IEC 60044 1 and ANSI IEEE C57 13 1 standards 0 50 Vac 10A max 0 300 Vac 10A max 0 500 Vac max 0 1200 Vac 0 2A max 0 2000 Vac 1 2 A
59. onnection 10 Figure 3 Bushing CT Connection on Delta 11 Figure 4 Bushing CT Connection on Y Transformer 11 Fiere 5 Sample CT Name Pl CC ee ore 12 Figure 6 Typical EZCT 2000A Tabulated Report 24 Figure 7 Typical EZCT 2000A Graphic 26 Figure 8 Typical EZCT 2000A Graphic Report with Multiple Plot 26 Figure 9 Typical Internal Test Record Directory 2 2000 nene 38 Figure 10 Typical USB Flash Drive Record Directory Printout 4 40 Figure 11 Typical EZCT 2000A Flash EEPROM Test Plan Directory Printout 53 Figure 12 Typical USB Flash Drive Test Plan Directory 55 Figure 135 Typical Test Plan PEHBEOULU E RV Tad rien 57 Figure 14 Graphic Report Showing Knee Point 75 Figure 15 Buried CT in a Delta Transformer Illustration 1 4 79 Figure 16 Buried CT in a Delta Transformer Illustration 2 79 Figure 17 EZCT 2000A V Verification Test 5 85 Figure 18 EZCT 2000A Verific
60. rd Storage Capacity The EZCT 2000A can store up to 140 test records in Flash EEPROM Each test record may contain up to 10 excitation curves current ratio readings polarity and DC resistance readings Test records can be recalled and printed on the built in thermal printer Internal Test Plan Storage Capacity The EZCT 2000A can store up to 128 CT test plans in Flash EEPROM A test plan defines the excitation test voltage and current range selection CT nameplate ratio and CT winding terminals X1 to X5 for each of the tests Up to 10 test definitions can be stored per test plan The use of a test plan greatly simplifies the CT testing process the EZCT 2000A is connected to the CT terminals and a test plan is simply selected and run Test plans can be created on the EZCT 2000A itself or created on a PC and downloaded to the EZCT 2000A via the unit s built in RS 232C or USB interfaces External Data Storage The EZCT 2000A features a standard USB Flash drive interface that makes it very convenient to store and transfer test records and test plans By plugging in a USB Flash drive you can quickly transfer your test records and test plans between a computer and the EZCT 2000A without the need to connect the unit to the computer Computer Interface The EZCT 2000A can be used as a stand alone unit or can be computer controlled via the built in RS 232C or USB interfaces A Windows XP Vista based Current Transformer Analysis software applicati
61. rminals and a test plan is selected to run 3 5 1 Extracting the Test Plan From a Test Record A test plan can be extracted from a test record for immediate or future use You can extract the test plan immediately after performing a test or you can extract the test plan from a restored test record see section 3 4 1 for instructions on how to restore a test record To extract a test plan from a test record a Either perform a test see section 3 3 or restore a test record see section 3 4 1 that you would like to extract the test plan from b Start from the START UP menu RUM TEST Ba le 18 24 29 TEST PLANS DIAGHOSTIC Press the 3 key TEST PLANS c The following screen will be displayed LOAD UNLOAD TEST FLAW PLAH DIRECTORY EXTRACT TEST PLAH TEST PLA ERASE TEST FLAH TO THUME DRIVE Press the 4 key EXTRACT TEST PLAN REV1 7 2000 USER S MANUAL d The following screen will be displayed The test plan will be extracted from the test record in the working memory and will be saved to the EZCT 2000A s Flash EEPROM as a new test plan The test plan number will be automatically incremented by the EZCT 2000A Press any key to return to the START UP menu EZCT 2000A USER S MANUAL REV1 3 5 2 Printing a Directory of Test Plans Stored in the EZCT 2000A s Memory You can print a directory of all the test plans stored in the EZCT
62. s jn Ix T HAIA STOF TO EXIT You can press the PAPER Contrast or PAPER v Contrast key to increase or decrease the V voltage respectively You can press the STOP key to end the test immediately and return to the START UP menu The test will automatically end after 15 seconds and you will be returned to the START UP menu REV1 2 2000 USER S MANUAL 5 2 Verifying the EZCT 2000A s V Sense Circuit Using an External Meter The excitation voltage V sensed by the EZCT 2000A can be verified using an external RMS volt meter Follow the steps below to verify the EZCT 2000A s V sense circuit a Connect the X cables to an RMS volt meter as shown in Figure 17 b Select the EZCT 2000A s Diagnostics mode see section 5 1 c Press the PAPER Contrast key to raise the V voltage d Verify the V voltage displayed on the EZCT 2000A LCD screen against the value displayed on the external volt meter e Press the STOP key to end the test X2 o P3 En hes es inest VOLT METER X1 C 7 2000A Current Transformer Tester 5 PAPER E3 7 8 9 eans ruv wxvz e o EMERGENCY TURN OFF PUSH UY Vanguard Instruments Co Inc Ontario California USA Figure 17 EZCT 2000A V Verification Test Connections EZCT 2000A USER S MANUAL REV1 5 3
63. s Flash EEPROM to a connected USB Flash drive using the steps below a Make sure a USB Flash drive is inserted in the EZCT 2000A s Flash drive port USB MEM port Then start from the START UP menu a FUH TEST He 16 18 SETUP 10 24 25 i TEST PLANS i DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID a FRIHT RECORD RECORD DIRECTORY SAVYE RES RECORD ERASE RECORD HEST pek Press the 4 key SAVE RES RECORD The following screen will be displayed 1 5 RECORD 2 COPY TO THUMB DRIVE Press the 2 key COPY TO THUMB DRIVE d The following screen will be displayed COPY REC TO THUMB 1 COPY SIHGLE RECORD VPE EE RM RU ES EZCT 2000A USER S MANUAL REV1 1 COPY SINGLE RECORD Press the 1 key COPY SINGLE RECORD if you would like to copy single record from the EZCT 2000A to the USB Flash drive The following screen will be displayed Type the record number that you would like to copy to the USB Flash drive and then press the ENTER key The following screen will be displayed showing the status of the copy process After the record has been copied the following screen will be displayed Press the 1 key YES if you would like to copy another record and repeat the process above Press the 2 key NO to return to the START UP menu
64. ta 77 1 1 2 2 D EZCT 2000A USER S MANUAL 1 2 RO CO K n E 81 5 0 DIAGNOSTICS VERIFICATION AND TROUBLESHOOTING 44 83 5 1 Performing a Diagnostics 0 00 6 000000 nsns 83 5 2 Verifying the EZCT 2000A s V Sense Circuit Using an External Meter 85 5 3 Verifying the EZCT 2000A s Sense Circuit Using an External 86 5 4 Quickly Verifying the EZCT 2000A s Turns Ratio 2020 87 5 5 X Troubleshooting Guide 0 110 2 2 00 2 4 6 nen 88 7 0 Appendix A Calculating Turns Ratio a Shunt 92 LIST OF TABLES Table 1 EZCT 2000A Technical 5 5 5 Table 2 Functional Descriptions of EZCT 2000A Controls and Indicators 7 Table 3 Descriptions of Tabulated Test Results 25 Table 4 Description of Test Plan Elements 57 LIST OF FIGURES Figure 1 EZCT 2000A Controls and 6 Figure 2 Typical EZCT 2000A Excitation and Ratio Test Cable C
65. the CT current ratio using the ANSI IEEE C57 12 90 measurement method A test voltage is applied on any two terminals of the CT X1 to X5 and the induced voltage is measured through the CT s H1 and H2 terminals The CT current ratio is displayed on the screen and stored in memory The current ratio measuring range is from 0 8 to 5 000 to 1 CT winding polarity is displayed as a sign in phase or a sign out of phase and is annotated with the phase angle in degrees CT Winding Resistance Test The EZCT 2000A can also measure the DC resistance of the CT winding under test The DC winding resistance measuring range is from 100 micro ohms to 10 ohms User Interface and Display The EZCT 2000A features a back lit LCD screen 240 x 128 dot graphic that is viewable in both bright sunlight and low light levels A rugged alpha numeric membrane keypad is used to control the unit Built in Thermal Printer A built in 4 5 inch wide thermal printer can print the current transformer test report and plot the excitation curves REV1 2 2000 USER S MANUAL Test Record Header Information Test record header information can include the company name substation name circuit ID manufacturer CT serial number operator s name and test record comments In addition to the test record header a 20 character test description for each test in the record 10 tests per record can also be entered Internal Test Reco
66. the EZCT 2000A s USB Flash drive port USB MEM port Then start from the START UP menu TEST Ba le 1 24 ie FUE 22 TEST PLANS 4 DIAGHOSTIC Press the 3 key TEST PLANS The following screen will be displayed LOAD UNLOAD TEST PLAN PLAH DIRECTORY ESTRACT TEST PLAN TEST PLA ERASE TEST PLAH CORY TO THUME DRIVE e u Press the 6 key ERASE TEST PLAN The following screen will be displayed 1 ERASE FLA 2 ERASE THMB PLAN Press the 2 key ERASE DRV PLAN The following screen will be displayed TEST FLAH 1 ERASE SINGLE FLAW 2 ERASE ALL FLAWS EZCT 2000A USER S MANUAL 1 1 ERASE SINGLE PLAN Press the 1 key ERASE SINGLE PLAN if you would like to erase a single plan from the USB Flash drive The following screen will be displayed Type the test plan number that you would like to erase and press the ENTER key The selected test plan will be erased and the following screen will be displayed Press any key to return to the START UP menu ERASE ALL PLANS Press the 2 key ERASE ALL PLANS if you would like to erase all the test plans on the USB Flash drive The following screen will be displayed If you would like to cancel the erasure process press the STOP key No test plans will be erased and you will be return
67. the header information a When the unit is turned on and the firmware has been loaded you will be presented with the START UP menu as shown below la EUH TEST B14 18 2 SETUP 1B 14 25 2 TEST PLANS 4 DIAGHOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD FRIHT RECORD RECORD DIRECTORY SAVE RES RECORD ERASE RECORD HEST Ea Lei Press the 1 key RECORD ID The following screen will be displayed COMPANY YAMGUART To POSITION ENTER TO ACCEPT Type the company name using the alpha numeric keypad When pressing a key the corresponding number on the key will be displayed first Pressing the key again will display the first letter on the key Pressing the key again will display the second letter on the key For example to type the letter you must press the 2 key twice To erase the character at the cursor position press the CLEAR key Press the PAPER Contrast key to move to the next character Press the PAPER Contrast key to move to the previous character Press the ENTER key when you are done typing the company name 0 EZCT 2000A USER S MANUAL REV1 d The following screen will be displayed STATION LAE T TO FOSITIOH ENTER TO ACCEPT Type the station name using the alpha numeric keypad and then press the ENTER key e The following screen will be displayed
68. umber 1 o Oc W Soo Figure 13 Typical Test Plan Printout Table 4 Description of Test Plan Elements Description Number of tests in test plan 2 Tests to be performed Excitation and Turns Ratio Terminals used for excitation test X2 X3 Maximum excitation voltage 300 V Maximum excitation current 2 0 A CT nameplate ratio 100 5 Test notes if any EZCT 2000A USER S MANUAL REV1 3 5 5 Erasing Test Plans From the Flash EEPROM To erase or all test plans from the EZCT 2000A s Flash EEPROM a Start from the START UP menu RUH TEST 2 SETUP TEST PLANS 4 DIAGHOSTIC Press the 3 key TEST PLANS b The following screen will be displayed LOAD TEST FLAH UNLOAD TEST PLAN FLAW DIRECTORY 4 EXTRACT TEST PLAN TEST PLA ERASE TEST PLAH CORY TO THUME DRIVE iei P pee a I Un CF Press the 6 key ERASE TEST PLAN The following screen will be displayed ERASE TEST FLAH 1 ERASE SINGLE FLAW 2 ERASE ALL PLAS 3 The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000A s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 ERASE INTERNAL PLANH 2 ERASE DRY PLAN Press the 1 key ERASE INTERNAL PLAN The following screen will be displayed REV1 2 2000 USER S MANUAL ERASE TEST FLAH 1 ERASE
69. voltage C T 2000A Current Transformer Tester o o 110 120Vac 12A 50 60Hz EMERGENCY TURN OFF PUSH gt Co Inc Figure 19 EZCT 2000A Turns Ratio Verification Test Connections EZCT 2000A USER S MANUAL REV1 5 5 Troubleshooting Guide PROBLEM DESCRIPTION Probable Cause When running the excitation test the V voltage is always zero The excitation current can be raised during a test When running the excitation test the V voltage can be raised but the excitation current is always zero during a test CT excitation knee point voltages and turns ratio readings are incorrect When running the excitation test the V reading is erratic Saturation test is correct but turns ratio test is erroneous Turns ratio test of a CT mounted on a transformer bushing is incorrect The EZCT 2000A X cables are driving a short circuit The EZCT 2000A X cable is driving an opened circuit CT may not be completely de magnetized If the user runs dc resistance test the CT will be magnetized The next test the EZCT 2000A executes is an excitation test If the excitation current did not reach at least 8 the CT is not completely de magnetized The EZCT 2000A X cable may be opened Each X cable has two conductors going from the clip end to the banana jacks If one of the conductors is opened the V readings Will be erratic cables problem Transfor

EZCT-2000A User`s Manual - Vanguard Instruments Company, Inc.

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