EZCT-2000 - Vanguard Instruments Company, Inc.
Contents
1. 9 3 2 EZCI2000XInputVoltageWarhiis ca 11 2 Peron M RE 12 3 3 1 Entering Test Record Header Information 12 3 3 2 Performing Resistance Excitation and Ratio TEStS 15 3 4 With Test ee EE 24 3 4 1 Restoring and Printing a Test Record From Flash EEPROM 24 3 4 2 Printing a Restored Test Record 27 3 4 3 Printing a Directory of Test Records Stored in the EZCT 2000 s Memory 28 3 4 4 Erasing Test Records From the Flash EEPROM 30 3 5 WORKING With Test PIAS peri aaa 32 3 5 1 Extracting the Test Plan From a Test Record 32 3 5 2 Printing a Directory of Test Plans Stored in the EZCT 2000 s Memory 34 Pina Ripoli 36 3 5 4 Erasing Test Plans From the Flash EEPROM nnne 38 3 5 5 Loading a Test Plan from the EZCT 2000 s Flash 40 3 5 6 Running a Test Using a Loaded Test 41 3 5 7 Unloading a Test Plan from the Working MemMOory i 44 4 0 CHANGING SETUP PARAMETER ccssssscssosssscssosssscsccssssscsccsssscsscsessencoussssensouessensousnss 45 41 Setting the Knee Point Marker 45 4 2 Selecting the Buried CT in Transformer Delta2. 21 Figure 7 Typical EZCT 2000 Graphic 23 Figure 8 Typical EZCT 2000 Graphic Report with Multiple Plot 23 Figure 9 Typical Internal Test Record Directory Printout 8 29 Figure 10 Typical EZCT 2000 Flash EEPROM Test Plan Directory 35 Figure TT Typical Test Plan Printout sini on ER Figure 12 Graphic Report Showing Knee Point Marker 46 Figure 13 Buried CT in a Delta Transformer Illustration 1 48 Figure 14 Buried CT in a Delta Transformer Illustration 2 48 Figure 15 EZCT 2000 V Verification Test Connections 53 Figure 16 EZCT 2000 Verification Test COonnections 54 Figure 17 EZCT 2000 Turns Ratio Verification Test Connections 55 a m p 57 a Cc 58 2411 3 TT 59 guia e 60 FICUFO Z 61 1 992 Tc 62 FISUF eege 63 SI 63 REV 2 2000 USER S MANUAL CONVENTIONS USED IN THIS DOCUMENT This
3. Enter the month date time 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 REV3 EZCT 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 RUN TEST 09 24 09 SETUP 08 20 14 TEST PLANS DIAGNOSTIC Press the 4 key DIAGNOSTIC b The following screen will be displayed SELECT TAP 1 1 3 X1 X3 5 NEXT PAGE 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 c The following screen will be displayed SELECT VOLTAGE RANGE 1 50V 4 LeOOV 300V 5 Q2000V SOOV Select the maximum output voltage on the X terminals by pressing the corresponding key 1 5 d The following screen will be displayed CAUTION CABLES WILL BE ENERGIZED ENTER TO CONTINUE Press the ENTER key to continue e The follo
4. 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 11 Test plan elements are described in Table 4 REV 3 EZCT 2000 USER S MANUAL EET Y cnr lt 4 NUMBER OF TESTS KNEE lil COMPANY APPARATUS TESTING zx STATION CA_ CCUFP Masses CIRCUIT MARIN CT_ T MER MODEL COMMENTS TEST TxyPE ExCIT RAT 4 0 TESTED TAP 225 TEST NUMBER A TEST YTG RANGE BOO v TEST CUR RANGE gt CH m lt NAME PLATE RATIO 100 5 TST NOT E EUST NUMBER Tre s ExCIT RAT TESTED TAP z PS 1 2628 T YTG RANGE Tea TT CUR RANGE 2 O A NA ME PLATE RATIO Z200 5 TST NOT E Item Number 1 o P Soo Figure 11 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 2000 USER S
5. 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 REV 3 EZCT 2000 USER S MANUAL I 1 fa 1 tt ae 1 TTT PLOT TrEEE 309 KNEE MARKER err EE E MITA cz CT EXCITATION O 1 ALA 101 UL Figure 7 Typical EZCT 2000 Graphic Report EE 8 0 EHE 1 mE Xin d 020 tr SERATE gt ECK 009033 HERI 24 YA I LITT LAL IEEE Sa ie 410 Sa CY eS 12 24 ee Ye 29 2 a I a Se ae 2 es Haier d ee E 1 11 A Ar gt MOL A DE 018 LOA lA Figure 8 Typical EZCT 2000 Graphic Report with Multiple Plot Curves GI PLOT eee pe KNEE MARKER LI EZCT 2000 USER S MANUAL REV 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 2000
6. 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 paper EZCT 2000 USER S MANUAL REV 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 Unscrew the two large printer cover screws and remove the printer cover Remove the leftover thermal paper roll from the paper holder Unroll the new thermal paper roll 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 Place the paper roll into the paper holder Lift the thermal head and align the thermal paper if necessary Re install the printer cover 2 6 Computer Interface Ports The EZCT 2000 features one USB and one RS 232C PC interface port A Windows based Current Transformer Analysis software application is supplied with the EZCT 2000 For further information please see the software user s manual REV3 EZCT 2000 USER S MANUAL 3 0 OPERATING PROCEDURES 3 1 EZCT 2000 Cable Connections Always connect the EZCT 2000 to the substation ground before connecting any test cables The EZCT 2000 is supplied with five 20 foot X test cables and one 35 foot H cable The X cable connections are required to
7. or the 3 key ASA 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 12 EZCT 2000 USER S MANUAL REV 100 E on sas EE CERE 1 ae Sr ti 11 gd 11 N 811111 2 O M i _____ H ee a 7 Hu I Y AH H 0 af H ZA EECH EE EE H Ou H fires rover tie EL AH 14 LLA n Figure 12 Graphic Report Showing Knee Point Marker REV3 EZCT 2000 USER S MANUAL 4 2 Selecting the Buried CT in Transformer Delta Option The EZCT 2000 can be used to measure the turns ratio of a CT buried in the transformer Delta windings see Figure 13 and Figure 14 for further information However in order for the unit to correctly calculate the turns ratio of a CT buried in the transformer Delta windings the CT Buried in Delta option must first be selected Use the steps below to set the Buried CT in Delta option a Start from the START UP menu RUN TEST 09 24 09 SETUP 08 20 14 TEST PLANS DIAGNOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID PRINT RECORD RESTORE RECORD NEXT PAG
8. 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 displayed Press the ENTER key Continue to step g EE REV EZCT 2000 USER S MANUAL 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 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 The following screen will be displayed if the selected test included a resistance test 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
9. will be erratic cables problem Transformer windings opposite side of CT windings is not shorted Check CT shorting screws Check X lead connections Check the CT terminal connection Raise the excitation voltage setting in the test plan Re run the excitation test You can quickly verify if the CT was de magnetized by looking at the last excitation graph Remove X cables from the EZCT 2000 and the CT terminals Check cable integrity using an Ohm Meter Check the V cable connection Check the cable integrity with an Ohmmeter See Figure 4 REV3 EZCT 2000 USER S MANUAL 6 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 18 H1 H2 Figure 18 The EZCT applies a test voltage V1 to the CT secondary winding The induced voltage V2 is sensed through the CT primary winding In this case a single conductor is used By definition the turns ratio is the voltage ratio V1 Ratio V2 EZCT 2000 USER S MANUAL REV 3 Figure 19 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 t
10. 2000 CURRENT TRANSFORMER TESTER HERE 7 8 CONTRAST Pans ruv ba 88 EMERGENCY TURN OFF PUSH HIGH VOLTAGE PRESENT Mm Vanguard Instruments Inc Ontario California USA Figure 17 EZCT 2000 Turns Ratio Verification Test Connections EZCT 2000 USER S MANUAL REV 5 5 Troubleshooting Guide PROBLEM DESCRIPTION Probable Cause Suggested Solution When running the excitation test the voltage is always zero The excitation current can be raised during a test When running the excitation test the 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 ona transformer bushing is incorrect The EZCT 2000 X cables are driving a short circuit The EZCT 2000 X cable is driving an opened circuit CT may not be completely de magnetized If the user runs a dc resistance test the CT will be magnetized The next test the EZCT 2000 executes is an excitation test If the excitation current did not reach at least 0 8A the CT is not completely de magnetized The EZCT 2000 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
11. 2000 USER S MANUAL e 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 2000 s Flash EEPROM as a new test plan The test plan number will be automatically incremented by the EZCT 2000 Press any key to return to the START UP menu EZCT 2000 USER S MANUAL REV 3 5 2 Printing a Directory of Test Plans Stored in the EZCT 2000 s Memory You can print a directory of all the test plans stored in the EZCT 2000 s Flash EEPROM using the steps below a Start from the START UP menu 1 RUN TEST 09 24 09 SETUP 08 20 14 3 TEST PLANS 4 DIAGNOSTIC Press the 3 key TEST PLANS b The following screen will be displayed l LOAD TEST PLAN UNLOAD TEST PLAN 3 PLAN DIRECTORY 4 NEXT PAGE Press the 3 key PLAN DIRECTORY c The following screen will be displayed while the test plan directory is printed on the thermal printer PRINTING DIRECTORY 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 10 REV3 EZCT 2000 USER S MANUAL F L ewnr DI Fe TEST PLAN NUMBER OF COMPANY STATION CIRCUIT mer MODEL COMMENTS TEST PLAN NUMBER OF COMPANY STATI ON CIRCUIT MFF MODEL 2 1 TEST FLAT FJLJ FA1ES
12. Figure 6 The following screen will be displayed Type the burden value using the keypad and then press the ENTER key I e EZCT 2000 USER S MANUAL REV The following screen will be displayed Type the Cos 0 value using the keypad and then press the ENTER key k The following screen will be displayed Select the rated secondary current by pressing the 1 key 5A or 2 key 1A I The following 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 n Ifthe selected test included a ratio test the following screen will be displayed momentarily IS REV3 EZCT 2000 USER S MANUAL CABLES ENERGIZED 1 X1l Xe I 0 0004 AMPS V 34 2 VAC O The following screen will then be displayed RATIO TEST 74 5 Vh 0 3970 0 053 RAT 200 04 When the ratio test is complete the final results will be displayed KEY TO CONTINUE 79 5 Vh 0 3970 0530 00 09 Press any key on the keypad to continue The following screen will be displayed PRINT TEST RESULTS 1 YES NO 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 2000 tabulated test report printout is shown in Figure 6 Typical
13. SHTI ECT FA1C3DOE L Dadda 395Ho 33M Sei 4 F E C O F O MH UMBE Fe OAT E T I ME _ dia de TESTS STAT I OMN t een E AL T Ub em mm E mer rA1AODE L SPJ 11 NUMNBEF Oe T Em T I ME aaa FAIL rFAESE CF OF TESTS sch STAT I OMN m t CIRCUIT em en E Maier MODEL Sea COMMENT S FE E OF Ge T E ME I aa gt gt 231 Fe Ge TEST 5S ic STAT I OM CA CUF 1 ES 2 CIRCUIT er CTT MF MODEL Ses 4 1 S Feb CORO DATE T I ME C a ECH Za FAL OF TEST es z ST eat I cori CIRCUIT rar re FAC3EDSE ZL See Figure 9 Typical Internal Test Record Directory Printout EZCT 2000 USER S MANUAL REV 3 4 4 Erasing Test Records From the Flash EEPROM You can erase individual or all test records stored in the EZCT 2000 s Flash EEPROM To erase a test record a Start from the START UP menu RUN TEST 09 24 09 SETUP 08 20 14 PLANS DIAGNOSTIC Press the 2 key SETUP b The following screen will be displa
14. built in RS 232C or USB interfaces Computer Interface The EZCT 2000 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 application is provided with each EZCT 2000 This software can be used to retrieve test records from the EZCT 2000 create test plans download test plans to the EZCT 2000 and can also be used to run CT tests from the PC Tabulated test records can be exported in Microsoft Excel format 1 2 Furnished Accessories The EZCT 2000 comes furnished with the following e 1 Cord e 5 20 foot X Cable Sets e 1 35 foot Cable Set e One RS 232C serial cable e One USB cable e Ground Cables e Duffel bag e Transportation Case K EZCT 2000 USER S MANUAL REV 1 3 Technical Specifications Table 1 EZCT 2000 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 INTERNAL TEST RECORD STORAGE INTERNAL TEST PLAN STORAGE SAFETY ENVIRONMENT CABLES WARRANTY Portable current transformer test set 16 8 W 12 6 H 14 D 42 7 cm x 32 0 cm x 35 6 cm Weight 56 Ibs 25 4 Kg 100 120 Vac or 200 240 Vac factory pre set 5
15. document uses the following conventions A key or switch on the EZCT 2000 is indicated as KEY and SWITCH Menu options are referenced as WENU OPTION Screen and menu names are referenced as SCREEN MENU NAME The terms test record and test shot are used interchangeably EZCT 2000 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 Important notes are indicated as w EZCT 2000 USER S MANUAL REV 1 0 INTRODUCTION 1 1 General Description and Features The EZCT 2000 is Vanguard s second generation microprocessor based current transformer test set The EZCT 2000 can perform the current transformer CT excitation test measure the CT winding resistance and CT current ratio automatically All of the EZCT 2000 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 2000 without any operator intervention With up to 2000 Vac excitation test voltage available the EZCT 2000 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 AC test voltage range for the CT excitation test 50 Vac 300 Vac 500 Vac 1200 Vac or 2000 Vac can
16. 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 The following screen will be displayed KEEP THIS TEST 1 YES NO Press the 1 key YES to keep the test results EZCT 2000 USER S MANUAL REV q 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 t The following confirmation screen will then be displayed Press any key to return to the START UP menu REV3 EZCT 2000 USER S MANUAL CT EXCITATION TEST RESULTS COMPANY VANGUARD STATION LAB CIRCUIT MER MODEL ooo SIN 2 5 5 31 COMMENTS OPERATOR TA TESTED TAP 2 112 28 RR ER TST NOTE 5 CT DATA POINTS CN cOoOHMmMsS gt 4 CUR lt A gt VTG E o HCH gt 450 O DOZZA 2 2 Soo 2 2 5 HEH E 1 5 569 lt OSSEE gt lt gt o OO 36 2 f 5 0do t3 5 lt gt e b DOOS5O eren 6 5 o 2 e 655 5 a OOPS a O so 5 LO 116 LO sas L 1 o OL35 L3 dA EE 4 1 CH a LO2z6 lt 1 5 CH He CHE naz o
17. 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 shown in Figure 2 Transformer bushing CT connections for Delta and Y transformers are shown in Figure 3 and Figure 4 respectively H1 2 3 4 5 T T 1 Vu 91 EZCT 2000 URRENT TRANSFORMER TESTER EMERGENCY TURN OFF PUSH VOLTAGE PRESENT Mm Vanguard Instruments Co Inc Ontario California USA Figure 2 Typical EZCT 2000 Excitation and Ratio Test Cable Connection EZCT 2000 USER S MANUAL REV 0 1 JUMPER INSTALLATION ON SECONDARY WINDING H1 JUMPER EZCT CABLES TYP 3 PLACES H2 1 amp 2 x2 EZCT B PHASE BUSHING CT 1 A PHASE C PHASE BUSHING CT BUSHING CT oe ei 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 xa 1 JUMPER INSTALLATION ON PRIMARY WINDING e X1 amp X2 EZCT gt 7 B PHASE HRF S BUSHING CT H2 1 EZCT p d xi Hi 1 iu A 1 1 amp X2 A PHASE EZCT BUSHING CT H1 EZCT EZCT 2 4 2 A RED K
18. which is cross referenced to a functional description in Table 2 The table describes the function of each item on the control panel The purpose of the controls and indicators may seem obvious but users should become familiar with them before using the EZCT 2000 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 ENS SDN DNE iN 1 5 x x a x A um EOT 2000 m ren D Vanguard Instruments Co Inc e A US Figure 1 EZCT 2000 Controls and Indicators EZCT 2000 USER S MANUAL REV Table 2 Functional Descriptions of EZCT 2000 Controls and Indicators Item Number 1 5 0 11 12 13 14 15 16 Panel Markings X1 X2 X4 X5 H GROUND 110 120 Vac 12A 50 60Hz HIGH VOLTAGE PRESENT EMERGENCY TURN OFF PUSH USB RS 232C Functional Description Current transformer excitation voltage connectors Each set of connectors contains a test voltage connector and sensing connector The EZCT 2000 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 graphic LCD screen 128 x 64 viewable in bright sunlight and low light levels Power switch wi
19. 0 60 Hz ANSI IEEE C57 12 90 IEC 60044 1 and ANSI IEEE C57 13 1 standards 0 50 10 max 0 300 Vac 10 max 0 500 Vac 5A max 0 1200 Vac 2A max 0 2000 Vac 1 2 A max 0 2 200 Vac Accuracy 1 0 of reading 1 volt 0 10 Accuracy 1 0 of reading 0 02A 0 8 999 0 1 1000 1999 0 3 2000 5000 1 0 360 degrees Accuracy 1 0 degree 100 micro ohms 10 ohms Accuracy 2 of reading 1 count 10 ohms Back lit LCD Screen 20 characters by 4 lines 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 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 41598 Five 20 foot X cable sets One 35 foot H cable set power cord One cable carrying duffel bag One year on parts and labor REV 3 EZCT 2000 USER S MANUAL 1 4 EZCT 2000 Controls and Indicators The EZCT 2000 s controls and indicators are shown in Figure 1 below A leader line with an index number points to each control and indicator
20. 8 ces 5 LA 025Z 268 868 2201 0125 lt 15 ob DO soe 2v 1222 1 o 5 e lt 252 7 ob 22 oc 5 1435 5 4 1 CH HES sch 1 L569 3 1a gt Ca 21 1215 LEOS Oo 2 22 lt 55 14a gt 55 5 o 1 0 136 5 L295 O 22 2 gt o 1525 gt ALL LOBO 22 5 D 1645 Lea 3 lt 5 22 dA 22 lt 1 aso TAO lt EIE o 23834 25 635 1 22 o 153 5 27 o 361 Z 155 2 4209 6 22 4 5 155 2 352 3 sea CH 5560 P 5 lt gt o 22 L59 A 2 S 1 DO BALZ lt 5 avo B 5 22 1 1623 lt L59 4 TABULATED GRAPH POINTS CUR gt SIT Gi c OH dH o DOLO DS I O O o ECH 22 lt 2 2 Soo O OOO gt FLO Oo 3 er EZ DOOBO 5 O o oio e x o OZO i 25 1 lt o O40 SA 1 1353 0 wrt lt 4 21 OB 12 5 O as37 lt gt o LOOO 135 2 2 5 52 gt O o ZOOO LAS5 A rar FOOO 1 5535 F 399 Sooo 2 55 O BILIA 1 gt gt gt LG6O ZOO 5 1 DOSSO Lei B 292 m OHMS WINDING RES VOL T SS 2 lt AMPS 123 VOLTS 4 6 Co 06580502 mrir ASA LC WkKkp ASA LO 5
21. E Press the 4 key NEXT PAGE c The following screen will be displayed RECORD DIRECTORY ERASE RECORD KNEE POINT MARKER NEXT PAGE Press the 4 key NEXT PAGE d The following screen will be displayed 1 SET TIME BURIED CT IN DELTA Press the 2 key BURIED CT IN DELTA e The following screen will be displayed BURIED CT IN DELTA RATIOS ADJUSTED BY TWO THIRDS Press any key to return to the START UP menu LIUM 0 EZCT 2000 USER S MANUAL REV 3 Vh 081121EZCT2kV667D Figure 13 Buried CT in a Delta Transformer Illustration 1 081121EZCT2kV667E Figure 14 Buried CT in a Delta Transformer Illustration 2 REV3 EZCT 2000 USER S MANUAL EZCT 2000 USER S MANUAL REV Setting the Clock To set the EZCT 2000 s internal clock Start from the START UP menu RUN TEST 09 24 09 SETUP 08 20 19 TEST PLANS DIAGNOSTIC Press the 2 key SETUP The following screen will be displayed RECORD ID PRINT RECORD RESTORE RECORD NEXT PAGE Press the 4 key NEXT PAGE The following screen will be displayed RECORD DIRECTORY ERASE RECORD KNEE POINT MARKER NEXT PAGE Press the 4 key NEXT PAGE The following screen will be displayed l SET TIME BURIED IN DELTA Press the 1 key SET TIME The following screen will be displayed ENTER MM DD YY HH MM SS
22. E F OF Come Ars STAT I OMN rir r FACOLDOE L TEST enr NUMBER OF COMPANY STATION CIRCUIT mer MODEL comments TEST PLAN NUMBER OF COMPANY STATION CIRCUIT MER MODEL COMMENTS TEST PLAN NUMBER OF COMPANY STAT I ON CIRCUIT mer MODEL COMMENTS TEST PLAN NUMBER OF COMPE ex CIRCUIT MEER MODEL COMmmeriTtiss TEST PLAN NOMEE OF Come my STATION CIRCUIT MEER MODEL COMMENTS NUMEER A Tes TS am 5 TESTS SHA Sam Lec FJLIFTESE F TESTS ic arrarAaTt US TESTING CACCLUE 5 NUMBER TESTS gt AT E T e t 25 Figure 10 Typical EZCT 2000 Flash EEPROM Test Plan Directory Printout EZCT 2000 USER S MANUAL REV 3 5 3 Printing a Test Plan To print a test plan a Start from the START UP menu RUN TEST 09 24 09 SETUP 08 20 19 TEST PLANS DIAGNOSTIC Press the 3 key TEST PLANS The following screen will be displayed LOAD TEST PLAN UNLOAD TEST PLAN PLAN DIRECTORY NEXT PAGE Press the 4 key NEXT PAGE The following screen will be displayed 1 EXTRACT TEST PLAN PRINT TEST PLAN ERASE TEST PLAN Press the 2 key PRINT TEST PLAN The following screen will be displayed PRINT TEST PLAN NUMBER
23. I Sense Circuit Using an External Meter You can verify the excitation current 1 sensed by the EZCT 2000 by using an external RMS ampere meter Follow the steps below to verify the EZCT 2000 s sense circuit a Connect the X cables to a power resistor and an RMS ampere meter as shown in Figure 16 b Select the EZCT 2000 s Diagnostics mode see section 5 1 Press the PAPER Contrast key to raise the V voltage d Verify the voltage displayed on the EZCT 2000 s LCD screen against the value displayed on the external RMS ampere meter Press the STOP key to end the test POWER RESISTOR AMPERE METER EZCT 2000 CURRENT TRANSFORMER TESTER 5 PAPER 7 8 9 CONTRAST 5 ruv wxvz EMERGENCY TURN OFF PUSH HIGH VOLTAGE PRESENT Mm Vanguard Instruments Co Inc Ontario California USA Figure 16 EZCT 2000 I Verification Test Connections E REV3 EZCT 2000 USER S MANUAL 5 4 Quickly Verifying the EZCT 2000 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 17 b Connect the X2 test lead to the H2 test lead as shown in Figure 17 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 voltage EZCT
24. MANUAL REV 3 5 4 Erasing Test Plans From the Flash EEPROM To erase one or all test plans from the EZCT 2000 s Flash EEPROM Start from the START UP menu RUN TEST 09 24 09 SETUP 08 20 19 TEST PLANS DIAGNOSTIC Press the 3 key TEST PLANS The following screen will be displayed LOAD TEST PLAN UNLOAD TEST PLAN PLAN DIRECTORY NEXT PAGE Press the 4 key NEXT PAGE The following screen will be displayed 1 EXTRACT TEST PLAN PRINT TEST PLAN 3 ERASE TEST PLAN Press the 3 key ERASE TEST PLAN The following screen will be displayed ERASE TEST PLAN 1 ERASE SINGLE PLAN ERASE ALL PLANS 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 PLAN NUMBER Type the test plan number that you would like to erase and press the ENTER key 2 2000 USER S MANUAL The selected test plan will be erased and the following screen will be displayed 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 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 T
25. O I Hp p N d CT YKP IEEE Lk LCE E VOLTS 250 0552 AMPS IEEE s i Sr VK ES ESESES lt NAME PLATE RATIO Zeene 5 lt gt MEASURED RATIO zoo 2 pePERCENT ERROR o os 25 15 PPOLARITY IN PHASE Ka gt PHASE ANGLE CHE 79 5 VOLTS D5 0O0532 AMPS GE EX CITATION CUR CURRENT RATIO ERROR TABLE BURDEN PERCENT RATED CURRENT 5 0 A UA COS 50 100 120 200 Figure 6 Typical EZCT 2000 Tabulated Report Printout EZCT 2000 USER S MANUAL REV Item Number N Oo WW 11 12 13 14 15 16 17 18 19 Table 3 Descriptions of Tabulated Test Results Elements Description Test record header information The EZCT 2000 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 IEC 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
26. Option 47 Seine ee EEUU MUI EU UE MUN EMEN Nn UE 50 5 0 DIAGNOSTICS VERIFICATION AND TROUBLESHOOTING 51 b Performing Diagnostics Test 51 5 2 Verifying the EZCT 2000 s V Sense Circuit Using an External Meter 53 5 3 Verifying the EZCT 2000 s Sense Circuit Using an External Meter 54 54 Quickly Verifying the EZCT 2000 s Turns Ratio CIFCU t 55 5 5 PFO UII SOON SUNG 56 6 0 Appendix A Calculating Turns Ratio on a Shunt 57 EZCT 2000 USER S MANUAL REV LIST OF TABLES Table 1 EZCT 2000 Technical Specifications 4 Table 2 Functional Descriptions of EZCT 2000 Controls and 6 Table 3 Descriptions of Tabulated Test Results Elements 22 Table 4 Description of Test Plan Elements Lira 37 LIST OF FIGURES Fiedre 1 EZCT 2000 Controls i 5 Figure 2 Typical EZCT 2000 Excitation and Ratio Test Cable Connection 9 Figure 3 Bushing CT Connection on Delta Transformer 10 Figure 4 Bushing CT Connection on Y Transformer 10 Heure 5 Sample er Name Pecora 11 Figure 6 Typical EZCT 2000 Tabulated Report PrINtOUt
27. TM EZCT 2000 DIGITAL CURRENT TRANSFORMER TESTER USER S MANUAL Vanguard Instruments Company Inc 7 1520 S Hellman Ave Ontario California 91761 USA TEL 909 923 9390 March 2014 FAX 909 923 9391 Revision 3 EZCT 2000 USER S MANUAL REV 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 2000 or cause errors in the test results Vanguard Instruments Company Inc assumes no liability for unsafe or improper use of the EZCT 2000 All 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 2000 can produce a voltage up to 2 000 Vac that can cause severe injury and or equipment damage Due to this reason the EZCT 2000 shall be used only by trained operators The EZCT 2000 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 All 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 2000 Always ground the EZCT 2000 to a substation ground be
28. Type the station name using the alpha numeric keypad and then press the ENTER key The following screen will be displayed CIRCUIT T L TO POSITION ENTER TO ACCEPT Type the circuit information using the alpha numeric keypad and then press the ENTER key The following screen will be displayed MANUFACTURER T L TO POSITION ENTER TO ACCEPT Type the manufacturer name using the alpha numeric keypad and then press the ENTER key The following screen will be displayed MODEL T L TO POSITION ENTER TO ACCEPT Type the model information using the alpha numeric keypad and then press the ENTER key The following screen will be displayed SERIAL NUMBER T L TO POSITION ENTER TO ACCEPT Type the serial number using the alpha numeric keypad and then press the ENTER key EZCT 2000 USER S MANUAL REV i The following screen will be displayed COMMENTS T L 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 OPERATOR T L 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 REV3 EZCT 2000 USER S MANUAL 3 3 2 Performing Resistance Excitation and Ratio Tests The foll
29. 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 and up to 128 CT test plans can be stored in the EZCT 2000 s Flash EEPROM The ability to use test plans makes CT testing an extremely simple process To perform a test the EZCT 2000 is connected to the CT terminals 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 performa 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 1 RUN TEST 09 24 09 SETUP 05 20 19 TEST PLANS DIAGNOSTIC Press the 3 key TEST PLANS c The following screen will be displayed 4 LOAD TEST PLAN 2 UNLOAD TEST PLAN 3 PLAN DIRECTORY 4 NEXT PAGE Press the 4 key NEXT PAGE d The following screen will be displayed 1 EXTRACT TEST PLAN 2 PRINT TEST PLAN 3 ERASE TEST PLAN Press the 1 key EXTRACT TEST PLAN REV3 EZCT
30. YPE FREQUENCY Hz INSULATING LIQUID NAPHTHENIC ASTM D 3487 88 MINERAL OIL CONTAINS NO PCB YEAR IMPEDANCE PER PHASE AT AND 75 2373 2 OHMS CORF TYPE DESIGN SOUND LEVEL 50 lt B 6 dB WINDING CONDUCTOR COPPER RATED VOLTAGE kV 00 TEMPERATURES CORE AND COILS MASS 70768 Jib 32100 kg 345 MAXIMUM AMBIENT TEMPERATURE 40 45 ven AMBIENT TEMPERATURE OlL MASS 48821 2715071 TOP Gil RISE WINDING AVERAGE RISE RATED POWER _ DIL VOLUME CEE gal 23836 i TANK AND FITTINGS MASS 41006 ip 18600 kg SHUNT REACTOR TERMINALS LIME HI M3 NEUTRAL H RATED VOLTAGE v RATED CURRENT 380 se O SHIPPING WITHOUT Oi Mass 1807511 45700 kg COMPLETE REACTOR MASS 160695 Jib 72890 Jkg ramo TERMINAL 5000 5 4000 54 4 CONSERVATOR AND RADIATORS WITHSTAND FULL VACUUM WARRANTY PERIOD 60 MONTHS AFTER ENERGIZATION OR 66 MONTHS AFTER DELIVERY Gi ALSTOM Grid Energia Lido AV GUILHERME SCHELL 11500 CANOAS RS CNR 05 356 949 0009 08 MADE IN BRAZIL Figure 24 1 SEN gt peste de C Vanguard Instruments Company Inc 1520 S Hellman Ave e Ontario CA 91761 e USA Phone 909 923 9390 e Fax 909 923 9391 www vanguard instruments com Copyright 2014 by Vanguard Instruments Company Inc EZCT 2000 User s Manual e Revisi
31. a 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 REV3 EZCT 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 Record Storage Capacity The EZCT 2000 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 2000 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 2000 is connected to the CT terminals and a test plan is simply selected and run Test plans can be created on the EZCT 2000 itself or created on a PC and downloaded to the EZCT 2000 via the unit s
32. be selected and then the test voltage is raised and lowered automatically by the EZCT 2000 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 2000 determines the CT current ratio using the ANSI IEEE C57 12 90 measurement method An AC 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 The 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 2000 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 2000 features a back lit LCD screen 4 lines by 20 characters that is viewable in both bright sunlight and low light levels A rugged alph
33. e following screen will be displayed ENTER TEST 1 NOTE T L 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 TEST 1 PARAMETERS 300V c DA X1 Xe START TO BEGIN Press the START key to begin the test The EZCT 2000 will start performing the test per the test plan parameters When the test has finished the following screen will be displayed ANY KEY TO CONTINUE Vx 77 b Vh 0 3876 I 0 O5ee RAT 200 08 Press any key to continue SS REV 3 EZCT 2000 USER S MANUAL f The following screen will be displayed PRINT TEST RESULTS l YES 2 N 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 g The following screen will be displayed KEEPA THIS TEST 1 YES 2 N Press the 1 key YES to keep the test results h The following screen will be displayed TEST 2 SAVED Press any key to continue i The following screen will be displayed KEEP THIS RECORD L YES 2 0 Press the 1 key YES to save the record The following screen will be displayed momentarily SAVING RECORD PLEASE WAIT The following confirmation screen will then be displayed RECORD NUMBER HAN BEEN SAVED Press any key to return
34. est 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 a Start from the START UP menu Press the 2 key SETUP b The following screen will be displayed Press the 2 key PRINT RECORD c The following screen will be displayed 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 will be returned to the START UP menu B DD EZCT 2000 USER S MANUAL REV 3 4 3 Printing a Directory of Test Records Stored in the EZCT 2000 s Memory You can print a directory of all the test records stored in the EZCT 2000 s Flash EEPROM using the steps below d b d Start from the START UP menu RUN TEST 09 24 09 SETUP 05 20 19 TEST PLANS DIAGNOSTIC Press the 2 key SETUP The following screen will be displayed RECORD ID PRINT RECORD RESTORE RECORD NEXT PAGE Press the 4 key NEXT PAGE The following screen will be di
35. fore 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 2000 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 REV EZCT 2000 USER S MANUAL TABLE OF CONTENTS CONVENTIONS USED IN THIS DOCUMENT 1 LO NIN TARO CO Nis 2 1 1 General Description Features 2 1 2 Green BEE 3 1 29 Technical 08611124 ei E 4 L4 221 2000 gel EE Te ele s ol rino 5 20 cee MEE eae neva Coens Come MEM TIE DTE 7 24 Operating tea 7 2 2 LCD Screen Contrast Control 7 23 Primer raper OnO Tm 7 2A PART eS E 30 VRPERATING PROGEDURES Ria iaia 9 3 1 EZCT 2000 Cable
36. he CT turns ratio in this situation since there is no secondary winding and a jumper can t be used REV3 EZCT 2000 USER S MANUAL Figure 22 show a CT with 5 taps The turns ratio of the CT can be measured by treating the CT secondary winding as an auto transformer When using this method the effect of the shunt reactor winding is totally eliminated The turns ratio measured by the EZCT or any electronic TTR is calculated as follows V1 Ratio V2 H1 H2 Figure 22 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 Calculated Ratio 1 20 EZCT 2000 USER S MANUAL REV 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 Voltage X2 X5 120 V x 55 100 V H1 V1 120V V2 100V H2 Figure 23 This method also eliminates the effect of the reactor winding on the H1 H2 terminals REV3 EZCT 2000 USER S MANUAL L ALSTOM SHUNT REACTOR SERIAL NUMBER INSTRUCTION BOOK 111 583 510 PHASE 3 STANDARD COOLING T
37. he 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 EZCT 2000 USER S MANUAL REV 3 5 5 Loading a Test Plan from the EZCT 2000 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 2000 s Flash EEPROM into the working memory a Start from the START UP menu 1 RUN TEST 09 24 09 SETUP 08 20 14 3 TEST PLANS 4 DIAGNOSTIC Press the 3 key TEST PLANS b The following screen will be displayed LOAD TEST PLAN UNLOAD TEST PLAN PLAN DIRECTORY NEXT PAGE Press the 1 key LOAD TEST PLAN c The following screen will be displayed LOAD TEST PLAN NUMBER 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 TEST PLAN LOADED Press any key to return to the START UP menu REV3 EZCT 2000 USER S MANUAL 3 5 6 Running a Test Using a Loaded Test Plan Once a test plan has been loaded into the working memory see section 3 5 5 for directions it can be used to run a test To run a test using a loaded test plan a Make sure a test pla
38. i PHASE BUSHING CT EZCT 041122ATRTO2 Figure 4 Bushing CT Connection on Y Transformer REV3 EZCT 2000 USER S MANUAL 3 2 EZCT 2000 X Input Voltage Warning The EZCT 2000 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 2000 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 2000 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 EZCT 2000 USER S MANUAL REV 3 3 Performing Tests 3 3 1 Entering Test Record Header Information You can enter the test record header information before performing
39. n has been loaded into the working memory and then start from the START UP menu RUN TEST 09 24 09 SETUP 05 20 19 TEST PLANS DIAGNOSTIC Press the 1 key RUN TEST b The following screen will be displayed this screen will only be displayed if a test plan has been loaded first TEST PLAN LOADED RUN WITH PROMPTS RUN AUTONOMOUSLY UNLOAD TEST PLAN 1 RUN WITH PROMPTS Press the 1 key to run the test with prompts Continue to step c 2 RUN AUTONOMOUSLY Press the 2 key to run the test autonomously The following screen will be displayed CABLES WILL BE ENERGIZED START TO BEGIN Press the START key and the EZCT 2000 will start running the test per the test plan settings The screen will be updated with the test status When the test has finished the following screen will be displayed SAVE THIS RECORD L YES 2 N Press the 1 key YES to save the record The following screen will be displayed momentarily lt 0 EZCT 2000 USER S MANUAL REV SAVING RECORD PLEASE WAIT Then the following confirmation screen will be displayed RECORD NUMBER HAN BEEN SAVED 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 c Th
40. o the transformer is between terminals H1 HO The V3 voltage will be included and the turns ratio will be V1 V2 V3 Ratio H1 V2 X1 V3 H2 2 Figure 19 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 REV3 EZCT 2000 USER S MANUAL 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 20 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 20 EZCT 2000 USER S MANUAL REV Figure 21 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 21 Since there is no secondary winding on the shunt reactor 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 user does not have an alternative method for verifying t
41. on 3 5 e March 25 2014 e TA
42. owing procedure describes the general steps for performing excitation resistance and ratio tests a When the EZCT 2000 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 RUN TEST 09 24 09 SETUP 08 20 19 TEST PLANS DIAGNOSTIC Press the 1 key RUN TEST to start a test b The following screen will be displayed e RES 8 RATIO EXCITATION amp RATIO EXCITATION ONLY RATIO 5 RESAEXC Select the test type by pressing the corresponding key 1 5 The following screen will be displayed SELECT TAP 1 1 1 X1 X3 4 Xb X5 5 NEXT PAGE 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 RANGE 1 50V 4 LeOOV 300V 5 2000V SOOV Select a test voltage range by pressing the corresponding key 1 5 EZCT 2000 USER S MANUAL REV If the selected test included excitation test the following screen will be displayed Select the maximum test current for the excitation test by pressing the corresponding key 1 6 If the selected test included a ratio test the following screen will be displayed 1 YES
43. 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 RUN TEST 09 24 09 SETUP 08 20 14 TEST PLANS DIAGNOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID PRINT RECORD RESTORE RECORD NEXT PAGE Press the 3 key RESTORE RECORD The following screen will be displayed RESTORE RECORD 1 ENTER RECORD NUMBER SCROLL TO SELECT 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 RECORD NUMBER Type the record number using the alpha numeric keypad and then press the ENTER key The following screen will be displayed RECORD RESTORED PRINT RECORD 1 YES NO REV3 EZCT 2000 USER S MANUAL 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 2 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 TO SCROLL FWD DUN TO SCROLL RVS Press the PAPER Contrast bu
44. splayed RECORD DIRECTORY ERASE RECORD KNEE POINT MARKER NEXT PAGE Press the 1 key RECORD DIRECTORY The following screen will be displayed PRINT DIRECTORY l FULL DIRECTORY SHORT DIRECTORY Press the 1 key to print a full directory listing of all the test records stored in the EZCT 2000 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 The short directory option prints the last 10 records stored in the EZCT 2000 s Flash EEPROM The short directory listing will be printed on the thermal printer and you will be returned to the START UP menu REV3 EZCT 2000 USER S MANUAL TEST DIRECTORY RECORDO NUMBEF Cali DODAT En T I ME dai a 13 S Lao LYFE OF TEST STAT I OF Aa mF SPI 4 Lee Corb 141 1 ES DODAT E T I ME car da ext ey LYE FS OF TESTER STAT I OF Ic KAES PLT mer FAODEzL Ses COMMAENT S FeECORODOD MNUIMB BEF 5 D3e TE T I dida DA 21 25 Lec 4 amp amp E FJLI FAESE CFZ OF TEST sz STAT I Ori SHASTA SUAI T CHYTY AFO CIRCUIT SHA ses mer HIT SUBI
45. 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 the header information d When the unit is turned on and the firmware has been loaded you will be presented with the START UP menu as shown below RUN TEST 09 24 09 SETUP 05 20 19 TEST PLANS DIAGNOSTIC Press the 2 key SETUP The following screen will be displayed L RECORD ID PRINT RECORD RESTORE RECORD 4 NEXT PAGE Press the 1 key RECORD ID The following screen will be displayed COMPANY T L 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 A 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 v Contrast key to move to the previous character Press the ENTER key when you are done typing the company name REV EZCT 2000 USER S MANUAL d The following screen will be displayed STATION T L TO POSITION ENTER TO ACCEPT
46. th 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 RS 232C PC interface Baud rate is set for 115KB 8 data bits 2 stop bits REV 3 EZCT 2000 USER S MANUAL 2 0 PRE TEST SETUP 2 1 Operating Voltages The EZCT 2000 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 2000 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
47. to the START UP menu K EZCT 2000 USER S MANUAL REV 3 5 Unloading a Test Plan from the Working Memory To unload the test plan from the working memory and clear all the test plan parameters a Start from the START UP menu RUN TEST 09 24 09 SETUP 08 20 19 TEST PLANS DIAGNOSTIC Press the 3 key TEST PLANS b The following screen will be displayed LOAD TEST PLAN UNLOAD TEST PLAN PLAN DIRECTORY NEXT PAGE Press the 2 key UNLOAD TEST PLAN c The following screen will be displayed TEST PLAN UNLOADED Press any key to return to the START UP menu REV3 EZCT 2000 USER S MANUAL 4 0 CHANGING SETUP PARAMETERS 4 1 Setting the Knee Point Marker Use the steps below to change the knee point marker for the excitation graph a Start from the START UP menu RUN TEST 09 24 09 SETUP 08 20 14 TEST PLANS DIAGNOSTIC Press the 2 key SETUP b The following screen will be displayed RECORD ID PRINT RECORD RESTORE RECORD NEXT PAGE Press the 4 key NEXT PAGE c The following screen will be displayed 1 RECORD DIRECTORY ERASE RECORD 3 KNEE POINT MARKER 4 NEXT PAGE Press the 3 key KNEE POINT MARKER d The following screen will be displayed 1 IEEE 30 DEGREE IEEE 45 DEGREE ANA 1074 gt 5171 Press either the 1 key 30 DEGREE the 2 key EEE 45 DEGREE
48. tton or the PAPER v Contrast key to display the next or previous test record respectively The test record information will be displayed as shown 1 09 24 09 13 16 eet KS SHA 566 MITSUBISHI ELECTRIC When you have located the test record that you would like to restore press the ENTER key The following screen will be displayed RECORD RESTORED PRINT RECORD 1 YES NO 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 EZCT 2000 USER S MANUAL REV d The following screen will be displayed PRINT OPTIONS l FULL DATA ABBREVIATED DATA Press the 1 key to print the tabulated data and graphics results on the thermal 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 REV EZCT 2000 USER S MANUAL 3 4 2 Printing a Restored Test Record You can print a t
49. wing screen will be displayed and the Vi and values will be continuously updated for 15 seconds C EZCT 2000 USER S MANUAL REV 3 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 REV3 EZCT 2000 USER S MANUAL 5 2 Verifying the EZCT 2000 s V Sense Circuit Using an External Meter The excitation voltage V sensed by the EZCT 2000 can be verified using an external RMS volt meter Follow the steps below to verify the EZCT 2000 s V sense circuit a b C Connect the X cables to an RMS volt meter as shown in Figure 15 Select the EZCT 2000 s Diagnostics mode see section 5 1 Press the PAPER Contrast key to raise the V voltage Verify the V voltage displayed on the EZCT 2000 LCD screen against the value displayed on the external volt meter Press the STOP key to end the test 2 2000 CURRENT TRANSFORMER TESTER d 8 CONTRAST Pans 2 fore EMERGENCY TURN OFF PUSH HIGH VOLTAGE PRESENT Mm Vanguard Instruments Co Inc Ontario California USA Figure 15 EZCT 2000 V Verification Test Connections C EZCT 2000 USER S MANUAL REV 3 5 3 Verifying the EZCT 2000 s
50. yed RECORD ID PRINT RECORD RESTORE RECORD NEXT PAGE Press the 4 key NEXT PAGE c The following screen will be displayed RECORD DIRECTORY ERASE RECORD KNEE POINT MARKER NEXT PAGE Press the 2 key ERASE RECORD d The following screen will be displayed ERASE RECORD 1 ERASE SINGLE REC ERASE ALL RECORDS 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 ERASE RECORD NUMBER Type the record number to be erased and press the ENTER key ESS REV 2 2000 USER S MANUAL Te The following screen will be displayed momentarily Press any key to return to the START UP menu 2 ERASE ALL RECORDS Press the 2 key if you would like to erase all of the test records stored in the EZCT 2000 s flash EEPROM The following confirmation screen will be displayed 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 The following screen will be displayed after all of the test records have been erased Press any key to return to the START UP menu EZCT 2000 USER S MANUAL REV 3 5 Working
Download Pdf Manuals
Related Search