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

1. 55 REV1 EZCT 2000C USER S MANUAL Figure 19 Typical USB Flash Drive Record Directory Printout 57 Figure 20 Typical EZCT 2000C Flash EEPROM Test Plan Directory 70 Figure 21 Typical USB Flash Drive Test Plan Directory 72 Figure 22 Typical Test Plan din 74 Figure 23 Graphic Report Showing Knee Point 91 Figure 24 Buried CT in a Delta Transformer Illustration 1 95 Figure 25 Buried CT in a Delta Transformer Illustration 2 95 Figure 26 EZCT 2000C V Verification Test 105 Figure 27 EZCT 2000C Verification Test eene 106 Figure 28 EZCT 2000C Turns Ratio Verification Test Connections 107 lu I 109 dU ilm aea Eaa 110 FIBULG 31 sec eb ipn reet ime Her 111 dj 112 a fc5 113 Un H
2. 114 Figure 35 coser E emet ied tele ke ERFURT QR CHAR VUE ARE TE DEKA HERR U 115 I Alp 116 dip EU 116 REV1 2 2000 USER S MANUAL CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions e Akeyorswitch on the EZCT 2000C is indicated as KEY e Menu options are referenced as MENU OPTION e Screen and menu names are referenced as SCREEN MENU e Theterms test record and test shot used interchangeably e The terms USB Flash drive and USB thumb drive are used interchangeably e EZCT 2000C LCD screen output is shown as e Warning messages are indicated as e Important notes are indicated as re EZCT 2000C USER S MANUAL REV 1 1 0 INTRODUCTION 1 1 General Description and Features The EZCT 2000C is Vanguard s third generation microprocessor based current transformer test set The EZCT 2000C is available in two models the EZCT 2000C and EZCT 2000C Plus Designed specifically for CT testing the EZCT 2000C has the following outstanding features that can greatly increase productivity and save time during the commissioning stage Performs CT excitation current ratio polarity and phase angle tests Automatically demagnetize CT under test when performing excitation tests Measure the DC resistance of transformer windings from 100 micro ohms to 20 ohms Stand alone or computer cont
3. 2 2000 DIGITAL CURRENT TRANSFORMER TESTER USER S MANUAL Vanguard Instruments Co Inc Ontario California USA www VANGUARD INSTRUMENTS COM JN Vanguard Instruments Company Inc y 1520S Hellman Ave Ontario California 91761 USA TEL 909 923 9390 June 2014 FAX 909 923 9391 Revision 1 4 EZCT 2000C 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 2000C or cause errors in the test results Vanguard Instruments Company Inc assumes no liability for unsafe or improper use of the EZCT 2000C 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 2000C can produce a voltage up to 2 000 Vac that can cause severe injury and or equipment damage Due to this reason the EZCT 2000C shall be used only by trained operators The EZCT 2000C s X output terminals are rated to 2 200 Vac working voltage Any voltage above 2 200 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 isol
4. 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 EZCT 2000C USER S MANUAL REV1 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 2000C s working memory using the steps below a Make sure the USB Flash drive containing the test record s is inserted in the EZCT 2000C s USB Flash drive port USB MEM port Then start from the START UP menu a TEST 4 17 13 SETUP TEST DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP The following screen will be displayed 1 RECORD 2 PRIMT RECORD 5 RECORD DIRECTORY 4 SAYE RESTORE RECORD a ERASE RECORD PAGE Press the 4 key SAVE RESTORE RECORD The following screen will be displayed 1 RESTORE RECORD 2 COPY TO THUMB DRIVE Press the 1 key RESTORE RECORD The following screen will be displayed 1 INTERHAL STORAGE 2 THUMB DRIVE Press the 2 key THUMB DRIVE REV1 2 2000 USER S MANUAL e The following screen will be displayed RESTORE THUME DRIVE REC Type the record number that you would like to restore and press
5. 14 TO POSITION TO ACCEPT Type the station name using the keypad and then press the ENTER key e The following screen will be displayed f CIRCUIT CIREUIT 1 14 TO POSITION ENTER TO ACCEPT Type the circuit information using the keypad and then press the ENTER key The following screen will be displayed MANUFACTURER 14 TO POSITION EHTER TO ACCEPT Type the manufacturer name using the keypad and then press the ENTER key g The following screen will be displayed MODEL ESCT 26880 Ti TO POSITIOH TO ACCEPT Type the model information using the keypad and then press the ENTER key EZCT 2000C USER S MANUAL REV1 h The following screen will be displayed Type the serial number using the keypad and then press the ENTER key i The following screen will be displayed Enter any relevant comments using the keypad and then press the ENTER key j The following screen will be displayed Type the operator s name using the keypad and then press the ENTER key All header information will be saved and you will be returned to the START UP menu REV1 EZCT 2000C USER S MANUAL 3 3 2 Performing Resistance Excitation and Ratio Tests The following procedure describes the general steps for performing excitation resistance and ratio tests a b C d When the EZCT 2000C is turned on it will first go throu
6. crre a VANGUARD 2 zooE SN NO COMMENT TESTS 5 5 2 MAN 1c MoD SN NO COMMENT La 56 Figure 18 Typical Internal Test Record Directory Printout EZCT 2000C USER S MANUAL REV1 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 stored in a USB Flash drive using the steps below a b C d Make sure the USB Flash drive is inserted in the EZCT 2000C s USB Flash drive port USB port Then start from the START UP menu a TEST 4 17 13 a SETUP 18 14 25 TEST DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP The following screen will be displayed RECORD ID FRIHT RECORD RECORD DIRECTORY SAYE RESTORE RECORD ERASE HERT PAGE Press the 3 key RECORD DIRECTORY The following screen will be displayed 1 INTERMAL DIRECTORY 2 THUMB DRIVE DIR Press the 2 key THUMB DRIVE DIR The following screen will be displayed while the directory is printed FRIHTIHMG DIRECTOR When printing is finished you will be returned to the START UP menu A sample directory printout is shown in Figure 19 2 REV1 EZCT 2000C USER S MANUAL THUMB Dres DATE T IME NUMBER OF STATION CIRCUIT mere MODEL s N COMMENTS THUMB DRY DATE T IME NUMBER OF ST
7. 100 micro ohms 10 ohms Accuracy 2 of reading 1 count 10 micro ohms 2 Mega ohms 500 Mega ohms Accuracy 396 of reading 500 1000 Vdc test voltage Backlit LCD Screen 240 x 128 pixels 114mm x 64mm viewable in bright sunlight and low light levels Built in 4 5 inch wide thermal printer One USB port and Bluetooth wireless intaerface One USB Flash drive interface port Flash drive not included Windows 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 6110A 1 and CAN CSA C22 2 No 1010 1 92 standards Operating 10 C to 50 C 15 F to 122 F Storage 30 C to 70 C 22 F to 158 F One 20 foot cable set X1 X5 one 35 foot H cable set current source cables insulation test cables power cord ground cable A transportation case is included with the purchase price One year on parts and labor REV1 EZCT 2000C USER S MANUAL 1 6 EZCT 2000C Controls and Indicators The EZCT 2000C 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 3 The table describes the function of each item on the control panel The purpose of the control
8. PUSH 15 Built in 4 5 inch wide thermal printer 16 USB PC USB PC interface 17 USB MEM USB Flash drive interface AC CURRENT AC current source connectors EZCT 2000C Plus Only 18 SOURCE 0 20A 19 BLUETOOTH Bluetooth indicator Optional REV1 EZCT 2000C USER S MANUAL 2 0 PRE TEST SETUP 2 1 Operating Voltages The EZCT 2000C 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 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 v 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 key To retract the thermal printer paper press and release the v key 2 4 Printer Paper The EZCT 2000C 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 TP4 CS 24 rolls TP4 3R 3 rolls BG Instrument Co
9. The following screen will be displayed Press the 2 key NO If you would like to run the burden test as well press the 1 key and then follow the instructions in section 3 3 3 steps c to e u The following screen will be displayed Press the 1 key YES to save the record EZCT 2000C USER S MANUAL REV 1 The following screen will be displayed momentarily v The following confirmation screen will then be displayed Press any key to return to the START UP menu REV1 EZCT 2000C USER S MANUAL CT EXCITATION TEST RESULTS COMPANY VANGUARD INSTRUMENTS STATION Les CIRCUIT a MER ABB MODEL EZcCT2000B SAN 2z6002 COMMENTS NO COMMENT OPERATOR VN TESTED TAP x1 x2 NOTE DATA POINTS CUR lt A gt VTG lt onms gt i o ooic o Aai 360 0 2 o ooia 41 25 gt 1 are 2 a 2 s 2 5 95 6 1 22 esi 2 62 6 3 49 Teo gt LI 8121 1 was o o0o06o s es waa 5 212 as o o0ize waa o cass as gt aces 7 6 wae ze o0a 2126 7 war o c2e4 33 99 2 216 45 69 1304 6 26 eo
10. 1 5 240 Ratio QS _ 24 1 20 Ratio X2 X5 200 Calculated Ratio REV1 EZCT 2000C USER S MANUAL 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 1 5 _ 1200 1 2 V X2 X5 1000 120v 12 V X2 X5 V x2 x5 100V H1 X1 X2 X3 V1 120V V2 100V X4 X5 H2 Figure 35 This method also eliminates the effect of the auto transformer or reactor windings 115 EZCT 2000C USER S MANUAL REV1 ALSTOM SHUNT REACTOR SERIAL NUMBER INSTRUCTION BOOK 111583 510 N or PHASE 3 STANDARD ANS COOLING TYPE FREQUENCY 60 Hz INSULATING LIQUID NAPHTHENIC ASTM D 3487 88 MINERAL OIL CONTAINS NO PCB YEAR IMPEDANCE PER PHASE AT 60Hz AND 75 C 23732 CORF TYPE DESIGN SOUND LEVEL 5OMVAr dB WINDING CONDUCTOR COPPER RATED VOLTAGE kV PHASORIAL DIAGRAM TEMPERATURES CORE AND COILS MASS 70768 Jib 32100 kg 345 H2 MAXIMUM AMBIENT TEMPERATURE 40 Amen TEMPERATURE 30 ass 48921 ip 22190 kg WINDING AVERAGE RISE RATED POWER MVAr nor ssor nar VOLUME 6586 24930 TANK AND FITTINGS MASS 4
11. 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 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 PLAN 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 I REV1 EZCT 2000C USER S MANUAL 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 EZCT 2000C USER S MANUAL 1 3 5 6 Erasing Test Plans From a USB Flash Drive To erase one or all test plans stored on a USB Flash drive a Make sure the USB Flash drive is inserted in the EZCT 2000C s USB Flash drive port USB port Then start from the START UP menu a EUH
12. DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP The following screen will be displayed 1 RECORD 2 PRIMT RECORD 5 RECORD DIRECTORY 4 SAVYE RFESTORE RECORD 5 ERASE RECORD PAGE Press the 5 key ERASE RECORD The following screen will be displayed 1 ERASE REC 2 ERASE THUMB DRY REC Press the 2 key ERASE THUMB DRV REC REV1 7 2000 USER S MANUAL 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 You can continue to erase additional records or press the STOP key to exit to the START UP menu EZCT 2000C USER S MANUAL 1 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 THUMB DRIVE RECORDS ARE OL SURE ENTER TO 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
13. Suggested Solution Check CT shorting screws Check X lead connections e Check the CT terminal connection e Raise the excitation voltage setting in the test plan Re run the excitation test e You can quickly verify if the CT was de magnetized by looking at the last excitation graph e Remove X cables from the EZCT 2000 and the CT terminals e Check cable integrity using an Ohm Meter Check the cable connection Check the V cable integrity with an Ohmmeter e See Figure 9 REV1 7 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 29 H1 X1 ee v X2 H2 Figure 29 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 109 EZCT 2000C USER S MANUAL REV1 Figure 30 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
14. The following screen will be displayed while the records are being erased ERASING ALL THUME DRIVE RECORDS PLEASE WAIT The following screen will be displayed after all of the test records have been erased ALL THUMB DRIVE RECORDS ERASED Press any key to return to the START UP menu REV1 EZCT 2000C USER S MANUAL 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 and also includes the insulation resistance test and CT load burden test definitions Up to 10 test definitions can be stored per test plan and up to 128 CT test plans can be stored in the EZCT 2000C s Flash EEPROM The ability to use test plans makes CT testing an extremely simple process To perform a test the EZCT 2000C 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 perform a test see section 3 2 or recall a test record see section 3 4 1 that you would like to extract the test plan from b Start from the START
15. VANGUARD STATION CIRCUIT mer MODEL gt s N COMMENTS OF TST NOTE BURDEN TEST RESULTS AMP BURDEN TEST MEAS CURRENT 5 A MEAS VOLTAGE 2 V 23 129 IMPEDANCE OHMS BURDEN e cos sa Figure 13 EZCT 2000C Typical Burden Test Results Report Printout REV1 EZCT 2000C USER S MANUAL 3 3 4 Performing an Insulation Resistance Test To perform an insulation resistance test a Make connections per Figure 12 13 or 14 below e 999 ook x 9 Figure 14 Connections for a typical high resistance measuring application X2 X3 X4 X5 Figure 16 Connections for a typical insulation resistance measurement for a CT with 2 terminals EZCT 2000C USER S MANUAL REV1 b e Start from the START UP menu RUH TEST B4 17 13 SETUP aT 1l iz TEST FLAHS DIAGHOSTICS CURRENT SOURCE Press the 1 key RUN TEST The following screen will be displayed a RES EXCIT amp RATIO EXCITATION amp RATIO EXCITATION RATIO OHLY RESISTANCE amp ERCIT BURDEH TEST ONLY INSULATION TST ONLY Press the 7 key INSULATION TST ONLY The following screen will be displayed ENTER TEST 1 Ti TO POSITIOH EHTER TO ACCEPT Use the alpha numeric keypad to enter a test note and then press the ENTER key The fol
16. VOLTAGE 495 5 v CURRENT MI CRO AMPS RESISTANCE ss 29 MEG OHMS Figure 17 EZCT 2000C Typical Insulation Resistance Test Results Report Printout EZCT 2000C USER S MANUAL REV1 3 3 5 Performing a Current Source Test EZCT 2000C Plus Only The EZCT 2000C Plus s programmable current source can be used to verify CT loads EZCT 2000C Plus can output up to a 20A current 0 15Vac To perform a current source test a Make connections per the figure below b Start from the START UP menu 1 RUM TEST B417 135 2 SETUP 18 15 25 5 TEST FLAHS 4 DIAGHOSTICS s CURRENT SOURCE Press the 5 key CURRENT SOURCE REV1 7 2000 USER S MANUAL The following screen will be displayed Press and hold the key to increase the current Press and hold the v key to decrease the current A timer will display the elapsed time that the current has been on d Press the STOP key to turn off the current source and return to the START UP menu EZCT 2000C USER S MANUAL REV 1 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 2000C 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 RUM TEST B4 17 135 SE
17. 0 78 3 5 7 Loading a Test Plan from the EZCT 2000C s Flash EEPROM 81 3 5 8 Loading a Test Plan from a USB Flash 83 3 5 9 Running a Test Using a Loaded Test 85 3 5 10 Unloading a Test Plan from the Working 89 EZCT 2000C USER S MANUAL REV1 4 0 CHANGING SETUP PARAMETERS rote VE M 90 4 1 Setting the Knee Point Marker 1 41 1 44 12011 2200 04 00 2 2 44 840 0000000000000000000000000000040 90 4 2 Enabling and Disabling the Buried CT in Transformer Delta Option 92 4 2 1 Enabling the Buried CT in Transformer Delta 92 4 2 2 Disabling the Buried CT in Transformer Delta 93 4 3 Setting 97 4 4 Setting the Preferred Interface Language 22 98 45 Printing Raw Memory Buffer 100 4 6 Disabling the Voltage Checking 101 5 0 DIAGNOSTICS VERIFICATION AND TROUBLESHOOTING 1
18. Buried CT in Transformer Delta Option a Start from the START UP menu Press the 2 key SETUP EZCT 2000C USER S MANUAL REV 1 b The following screen will be displayed C a RECORD IL RECORD RECORD DIRECTORY SAYE RES RECORD ERASE FECORD HEAT PAGE Press the 6 key NEXT PAGE The following screen will be displayed 4 SET LANGUAGE BURIED CT DELTA POINT MARKER FAM DATA DISABLE H VTG CHECK Press the 3 key BURIED CT IN DELTA The following screen will be displayed 1 BURIED CT DELTA 2 BURIED CT DELTA OFF Press the 2 key BURIED CT DELTA OFF The following screen will be displayed BURIED CT IH DELTA IS RATIOS DISPLAYED AS MEASURET Press any key to return to the START UP menu REV1 EZCT 2000C USER S MANUAL 081121EZCT2kV667D Figure 24 Buried CT in a Delta Transformer Illustration 1 081121EZCT2kV667E Figure 25 Buried CT a Delta Transformer Illustration 2 EZCT 2000C USER S MANUAL REV 1 REV1 EZCT 2000C USER S MANUAL 4 3 Setting the Clock To set the EZCT 2000C s internal clock a Start from the START UP menu a TEST 85 82 13 SETUP 14 14 25 TEST DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP b The following screen will be displayed RECORD IL FRINT RECORD DIRECTORY SAV
19. EZCT 2000C automatically demagnetizes the CT under test when performing an excitation test Winding Resistance Test The EZCT 2000C can measure the DC resistance of transformer windings from 100 micro ohms to 10 ohms Ratio and Polarity Tests The CT current ratio is determined using the ANSI IEEE C57 12 90 measurement method A test voltage is applied on any two terminals X1 to X5 of the CT and the induced voltage is measured through the H1 and H2 terminals of the CT The CT current ratio is displayed and also stored in memory The current ratio is measured from 0 8 to 5 000 The CT winding polarity is REV1 EZCT 2000C USER S MANUAL un displayed as a sign in phase or a sign out of phase and is annotated with the phase angle in degrees The CT current ratio error and phase displacement is also calculated based on the CT burden or rated power and rated current Current Ratio and Phase Error Tables As part of the tabulated test results the EZCT 2000C can also print the current ratio and current phase error tables Test Record Header Information Test record header information including the company substation name circuit ID manufacturer mode CT serial number and the operator s name can be stored with each record 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 User Interface and Display The EZCT 2000C f
20. S MANUAL DATE TIME NUMBER OF STATION CIRCUIT mer MODEL en COMMENTS DATE TIME NUMBER OF STATION CIRCUIT MER MODEL s N COMMENTS T IME NUMBER OF STAT ION CIRCUIT rar re MODEL SAN COMMENTS DATE TIME NUMBER OF STAT ION CIRCUIT rar re MODEL s N COMMENTS DATE TIME NUMBER OF STAT ION CIRCUIT mere MODEL s N COMMENT DATE T IME NUMBER OF STATION CIRCUIT rar re MODEL SAN COMMENTS DATE TIME NUMBER OF STAT ION CIRCUIT MER MODEL S N COMMENTS TEST DI RECT ORY RECORD NUMBER RECORD NUMBER RECORDO NUMBER RECORD NUMBER RECORD NUMBER RECORD NUMBER RECORD NUMBER obr 2S5 TESTS LAB CIR 1 ABB 2 22 lt SN 1 NO COMMENT 32 27 e ober 2570909 TESTS 2 LABS FEE 2 LOGOGoE SN NO COMMENT O6 Oe Oto ALES 4 1 4 TESTS LAS VANGUARD 2 IOOGOE SN 4 NO COMMENT a Ce Ote 2 5 25 5 O5 TESTS LAS VANGUARD 2 gt SN NO COMMENT ALES 29 TESTS L exE CIR VANGUARD 2 IGooE SN x NO COMMENT Om LES s 2 5 2 22 TESTS 1 lt
21. UP menu RUM TEST 04 1812 SETUP 19 14 25 TEST PLANS DIAGHOSTICS CURRENT SOURCE Press the 3 key TEST PLANS c The following screen will be displayed LOAD TEST FLAH UHLIA TEST FLAH FLAH DIRECTORY EXTRACT TEST PLAN FEIHT TEST FLAH ERASE TEST FLAH COPY TO THUME DRIVE a D P e Press the 4 key EXTRACT TEST PLAN EZCT 2000C USER S MANUAL REV1 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 2000C s Flash EEPROM as a new test plan The test plan number will be automatically incremented by the EZCT 2000C Press any key to return to the START UP menu REV1 7 2000 USER S MANUAL 3 5 2 Printing a Directory of Test Plans Stored in the EZCT 2000C s Memory You can print a directory of all the test plans stored in the EZCT 2000C s Flash EEPROM using the steps below a Start from the START UP menu a EUH TEST a4 13713 15 11 19 TEST PLANS DIAGHOSTICS CURRENT SOURCE Press the 3 key TEST PLANS b The following screen will be displayed 1 LOAD TEST FLAH 2 UNLOAD TEST PLAH 5 PLAN DIRECTORY EXTRACT TEST FLAH FRIHT TEST PLA ERASE TEST FLAH T COPY TO THUMB DRIVE Press the 3 key PLAN DIRECTORY The following screen will be displayed while the test plan directory is printed on the thermal printer FRIHTIHMG DIRE
22. below a Start from the START UP menu RUM TEST B4 17 135 SETUP 19 19 55 TEST PLAHS DIAGHOSTICS CURREHT SOURCE 1 2 ce 4 d Press the 2 key SETUP The following screen will be displayed RECORD ID FRIHT RECORD RECORD DIRECTORY SAVE RESTORE RECORT ERASE RECORD PAGE Press the 3 key RECORD DIRECTORY The following screen will be displayed FRIHT DIRECTORY 1 FULL BIBEBTDURY 2 SHORT DIRECTORY The above screen will be displayed only if a USB Flash drive is connected to the EZCT 2000C s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 INTERMAL DIRECTORY 2 THUMB DRIVE DIF Press the 1 key INTERNAL DIRECTORY The following screen will be displayed EZCT 2000C USER S MANUAL 1 Press the 1 key to print a full directory listing of all the test records stored in the EZCT 2000C 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 18 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 2000C s Flash EEPROM The short directory listing will be printed on the thermal printer and you will be returned to the START UP menu REV1 EZCT 2000C USER
23. test plans are being erased EZCT 2000C USER S MANUAL REV 1 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 REV1 7 2000 USER S MANUAL 3 5 7 Loading a Test Plan from the EZCT 2000C 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 2000C s Flash EEPROM into the working memory a Start from the START UP menu a RUM TEST a4 13713 SETUP 18 15 20 TEST PLANS DIAGHOSTICS CURRENT SOURCE Press the 3 key TEST PLANS b The following screen will be displayed 1 LOAD TEST a UNLOAD TEST PLAH FLAH DIRECTORY TEST FRIHT TEST FLAH ERASE TEST FLAH TO THUMB DRIVE Uh CD Press the 1 key LOAD TEST PLAN c The following screen will be displayed LOAD TEST PLAN HUMBER The above screen will be displayed only if a USB Flash drive is connected to the EZCT 2000C s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 INTERNAL STORAGE 2 THUMB DRIVE Press the 1 key INTERNAL STORAGE The following screen will be displayed EZCT 2000C USER S MANUAL REV1 Type the test plan number that you would like to load and press the ENTER key If you do not know the te
24. 03 5 1 Performing a Diagnostics osea ee digi 103 5 2 Verifying the EZCT 2000C s V Sense Circuit Using an External Meter 105 5 3 Verifying the EZCT 2000C s Sense Circuit Using an External Meter 106 5 4 Quickly Verifying the EZCT 2000C s Turns Ratio 107 5 Troubleshooting GUB Ede das 108 6 0 Appendix A Calculating Turns Ratio on a Shunt 109 LIST OF TABLES Table 1 Ordering Mnrarmallofis 5 Table 2 2 2000 Technical Specifications 6 Table 3 Functional Descriptions of EZCT 2000C Controls 8 Table 4 Descriptions of Tabulated Test Results 30 Table 5 Description of Test Plan 74 LIST OF FIGURES Figure 1 EZCT 2000C Controls and Incdicators iuie ice 7 Figure 2 Typical EZCT 2000C Excitation and Ratio Test Cable Connections 11 Figure 3 Connections for a typical high resistance measuring applicat
25. 1006 Jib 718600 kg SHUNT REACTOR TERMINALS UNE HT WO RATED VOLTAGE V RATED CURRENT 300 INSULATION LEVELS NEUTRAL wed SHIPPING WITHOUT OIL MASS 100751 Jib 45700 kg COMPLETE REACTOR MASS 160695 Jib 72890 Jkg CT s 7 TO 12 mmo emen 299 54 x xs 509 54 1000 54 xz xs 1000 34 xr x 90 54 x32x5 3500 54 5 xi xe 5 xz x 2500 94 x2 x 500 34 xy x 2000 94 400 5 1500 5 200 54 xi xz 500 54 LFUNCTION MADE IN BRAZIL ALSTOM Grid Energia Lida AV GUILHERME SCHELL 11500 CANOAS RS CNPJ 05 356 949 0009 08 Figure 37 0 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 2000C User s Manual e Revision 1 4 e June 6 2014 e TA
26. 13607 E Trent Avenue Spokane WA 99216 Tel 509 893 9881 Fax 509 893 9803 Part Number VIC TP 4 paper EZCT 2000C USER S MANUAL REV1 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 e Re install the printer cover REV1 EZCT 2000C USER S MANUAL 3 0 OPERATING PROCEDURES 3 1 EZCT 2000C Cable Connections Always connect the EZCT 2000C to the substation ground before connecting any test cables The EZCT 2000C is supplied with five 20 foot X test cables 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 shown in Figure 2 The insulation resistance test connection is shown in Figure 3 The burden test connection is shown in Figure 6 The current source test connection is shown in Figure 7 Tran
27. ATION CIRCUIT S MER MODEL S N COMMENTS THUMB Dres DATE T IME NUMBER OF STATION S rar re MODE t SMAN COMMENT S 21 25 25 5 2 2 FILENAME gt 1 lt lt lt TESTS 2 LAB CIR ABB 2 22 lt lt SN NO COMMENT 13 29O FILENAME gt 140 TESTS LARS 1 ABS 2 ILOGOoE SN c NO COMMENT REC OOZ Lo 55 FILENAME gt gt 6 2 lt gt gt lt gt TESTS CAB Cr VANGUARD IGooEg SN NO COMMENT Figure 19 Typical USB Flash Drive Record Directory Printout EZCT 2000C USER S MANUAL REV 1 3 4 6 Copying Test Records to a USB Flash Drive You can easily copy test records stored in the EZCT 2000C 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 2000C s Flash drive port USB MEM port Then start from the START UP menu a FUH TEST 4 18 13 SETUP 19 11 12 TEST DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP The following screen will be displayed 1 RECORD 2 PRIMT RECORD 5 RECORD DIRECTOR 4 SAYE RESTORE RECORD a ERASE RECORD PAGE Press the 4 key SAVE RESTORE RECORD The following screen will be displayed 1 RESTORE RECORD 2 COPY TO THUMB DR
28. BIZET START TO Press the START key and the EZCT 2000C will start running the test per the test plan settings The screen will be updated with the test status EZCT 2000C USER S MANUAL REV1 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 REV1 EZCT 2000C USER S MANUAL c The following screen will be displayed EHTER TEST 1 14 TO POSITIONH EHTER TO ACCEPT Use the keypad to enter a test note and press the ENTER key d The following confirmation screen will be displayed showing the test parameters the screen will vary depending on which test is being performed as defined in the test plan TEST 1 PARAMETERS B 2A START TO Press the START key to begin the test e The EZCT 2000C will start performing the test per the test plan parameters When the test has finished the following screen will be displayed AHY KEY TO COHTIHLE 5174 I 8 8324 199 95
29. CTOR The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000C s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 INTERNAL DIRECTORY 2 THUMB DRIVE DIF Press the 1 key INTERNAL DIRECTORY Continue with the steps below EZCT 2000C USER S MANUAL REV1 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 20 TESE PLAN DI Fr TEST PLAN NUMBER NUMBER OF TESTS COMPANY VANGUARD STATION LAB CIRCUIT MER VANGUARD MODEL 22 lt lt lt COMMENTS NO COMMENT TEST PLAN NUMBER NUMBER OF Tests ccor1rmenrx VANGUARD STAT ION LAB CIRCUIT crre MER VANGUARD MODEL E LZCCTIOOOE COMMENTS NO COMMENT Figure 20 Typical EZCT 2000C Flash EEPROM Test Plan Directory Printout REV1 EZCT 2000C USER S MANUAL 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 in the EZCT 2000C s USB Flash drive port USB port Then start from the START UP menu a EUH TEST a4 13713 SETUP 14 21 29 TEST PLANS DIAGHOSTICS CURRENT SOURCE Press the 3 key TEST PLANS b The following screen will b
30. CURRENT SOURCE 0 20 Figure 28 EZCT 2000C Turns Ratio Verification Test Connections 107 EZCT 2000C USER S MANUAL REV1 5 5 PROBLEM DESCRIPTION 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 transformer bushing is incorrect Troubleshooting Guide Probable Cause The EZCT 2000C X cables are driving a short circuit The EZCT 2000C 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 2000C 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 2000C 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 Transformer windings opposite side of CT windings is not shorted
31. ECI AU OIG Rm UT 6 1 6 2 2000 Controls and InGICBEOFrs o estne ceca teer 7 2 0 I 23i ciui Rente TE 9 2 1 ATH PRU 9 12 LCD Screen Contrast sse iei nep acredita dense onus uir cuu uva 9 23 Papel e aiitem et odes 9 2 4 Printer Paper t ERR ER 9 3 0 OPERATING PROCEDURES aient M 11 3 1 EZCPZDODC Cable ConnectlofiS 11 3 2 200 X Input Voltage Warning 2 ad ain cu td o e a tun 17 3 8 Performing 18 3 3 1 Entering Test Record Header Information 1 0 18 3 3 2 Performing Resistance Excitation and Ratio 21 3 3 3 Performing a CT Burden Test EZCT 2000C Plus 32 3 3 4 Performing an Insulation Resistance 37 3 3 5 Performing a Current Source Test EZCT 2000C Plus 42 3 4 Working With Test RecordS recien te
32. HING CT i da C PHASE BUSHING CT x3 A PHASE BUSHING CT H1 H2 EZCT EZCT 1 amp X2 1 amp 2 2 2 041122ATRTO1 Figure 8 Bushing CT Connection on Delta Transformer H2 ee H3 CABLES CABLES TYP 3 PLACES TYP 3 PLACES H1 EZCT X1 amp X2 NOTES EZCT 4 B PHASE 1 JUMPER INSTALLATION ON PRIMARY WINDING BUSHING CT H2 X1 amp X2 EZCT EZCT X1 amp X2 EZCT A PHASE BUSHING CT H1 EZCT C PHASE H1 BUSHING 4 2 041122ATRTO2 x3 Figure 9 Bushing CT Connection on Y Transformer REV1 EZCT 2000C USER S MANUAL 3 2 EZCT 2000C X Input Voltage Warning The EZCT 2000C X output terminals are rated to 2 200 Vac working voltage Any voltage present at these terminals above 2 200 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 10 below Figure 10 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 2000C and the excitation test is performed on the X1 X2 terminals the voltage ind
33. HO The V3 voltage will be included and the turns ratio will be Ratio 7 V3 H1 e H2 2 30 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 REV1 EZCT 2000C 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 31 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 H1 v2 gt V1 X1 Install Jumper H2 x2 Figure 31 111 EZCT 2000C USER S MANUAL REV1 Figure 32 shows a CT mounted on an auto transformer This configuration is very similar to the CT mounted on a single phase transformer the main difference being that the secondary winding is part of the primary winding The turns ratio in this case will be v Ratio V2 V3 v2 5 V1 X1 Jumper 0 0 32 By shorting out the transformer s secondary winding X1 to we can eliminate the voltage induced from X1 to The voltage cannot be eliminated and will create an error in the CT turns ratio measurement The amount of error depends on the amou
34. IVE Press the 2 key COPY TO THUMB DRIVE The following screen will be displayed COPY REC TO THUMB 1 COP SIHGLE RECORD 2 COPY ALL RECORDS REV1 2 2000 USER S MANUAL 1 COPY SINGLE RECORD Press the 1 key COPY SINGLE RECORD if you would like to copy a single record from the EZCT 2000C 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 EZCT 2000C USER S MANUAL REV1 2 COPY ALL RECORDS Press the 2 key COPY ALL RECORDS if you would like to copy all the test records from the EZCT 2000C to the USB Flash drive The following screen will be displayed SAVING RECORD 1 TO THUMB 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 HAVE TRAHSFERRED TO DRIVE Press any key to return to the START UP menu REV1 7 2000 USER S MANUAL 3 4 7 Erasing Test Records From t
35. OH EHTER TO ACCEPT Use the alpha numeric keypad to enter a test note and then press the ENTER key e The following screen will be displayed TEST 1 1A 2 uH Select the burden test current by pressing either the 1 key 1A the 2 key 5A EZCT 2000C USER S MANUAL REV 1 f Thefollowing screen will be displayed Press the START key to begin the test g The following screen will be displayed The following screen will be displayed momentarily Then the following screen will be displayed When the test is completed the test results will be displayed temporarily REV1 7 2000 USER S MANUAL Then the following screen will be displayed Print 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 burden test results report is shown in Figure 13 Press the 2 key NO if you do not want to print the test results h The following screen will be displayed Press the 1 key YES to keep the test results i The following screen will be displayed Press the 1 key YES to save the test record The following screen will be displayed momentarily 9 EZCT 2000C USER S MANUAL 1 The following confirmation screen will be displayed Press any key to return to the START UP menu EXCITATION TEST RESULTS COMPANY
36. PS CURRENT RATIO ERROR TABLE BURDEN PERCENT RATED CURRENT 5 0 A cos e 100 120 200 10 00 0 20 0 10 0 08 0 07 0 06 5 00 0 20 0 07 0 06 0 06 0 05 2 50 2 0 20 0 06 0 05 0 05 0 04 1 25 0 20 O 0 04 0 00 1 00 0 0 03 va 2 40 10 00 2 0 20 O 10x 5 00 0 20 0 08 2 50 2 0 20 0 07 1 25 0 20 0 06 0 00 1 00 0 CURRENT PHASE ERROR TABLE lt PHASE ERROR IN MINUTES gt BURDEN PERCENT RATED CURRENT 5 0 A 2 cose Sox 100 120 200 10 00 0 20 0 17 0 23 0 25 0 30 5 00 0 20 0 64 0 43 0 40 0 29 2 50 2 0 20 1 07 0 80 0 73 0 60 1 25 0 20 1 31 0 99 0 92 0 7 0 00 1 00 1 54 1 18 1 10 0 93 7 cns 5 10x 20 40 10 00 0 20 O O9 O O09 0 09 0 13 5 00 0 20 1 03 1 02 1 02 0 69 2 50 2 0 20 1 53 1 54 1 53 1 18 1 28 0 20 1 80 1 80 1 81 1 45 0 00 2 1 00 2 07 2 07 2 07 1 70 BURDEN TEST RESULTS a AMP BURDEN TEST MEAS CURRENT A MEAS VOLTAGE es ses v 2 IMPEDANCE 47 330 OHMS BURDEN vA cose o ec INSULATION RES TEST VOLTAGE 498 6 v CURRENT 5 03 MICRO AMPS RESISTANCE 1 lt MEG OHMS Figure 11 Typical EZCT 2000C Tabulated Report Printout 29 EZCT 2000C USER S MANUAL REV 1 Table 4 Descriptions of Tabulated Test Results Elements ace Description 1 Test record header information 2 The EZCT 2000C X terminals taps tha
37. Press any key to continue f The following screen will be displayed PRINT TEST RESULTS 1 WES 2 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 EZCT 2000C USER S MANUAL REV1 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 the 1 key YES to save the record The following screen will be displayed momentarily The following confirmation screen will then be displayed Press any key to return to the START UP menu REV1 EZCT 2000C 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 a Start from the START UP menu 1 RUM TEST 2 eETUF 11 13 15 5 TEST PLAHS 4 DIAGHOSTICS a CHUREREHT SOURCE Press the 3 key TEST PLANS b The following screen will be displayed 1 LOAD TEST PLAH 2 UNLOAD TEST FLAN DIRECTORY EXTRACT TEST PLAH FRIHT TEST PLA ERASE TEST COPY TO THUME DRIVE Press the 2 key UNLOAD TEST PLAN c The following screen will be displayed TEST UNLOADED Press any key to return to the START UP menu EZCT 2000C USER S MANUAL REV1 4 0 CHANGING SETUP PARAMETERS 41 Setting the Knee Point Marker Use the ste
38. S b The following screen will be displayed LOAD TEST PLA UHLIA TEST FLAH FLAH DIRECTORY TEST FLAH PRIHT TEST ERASE TEST FLAH COPY TO THUME DRIVE C Cn Ra e Press the 5 key PRINT TEST PLAN c The following screen will be displayed FRIHT TEST FLAW 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 22 Test plan elements are described in Table 5 EZCT 2000C USER S MANUAL REV1 TEST PLAN NUMBER OF TESTS A ASA 1OoO t5co VANGUARD INSTRUMENTS LAB KNEE COMPANY STAT ION MER ABS MODEL COMMENT S NO COMMENT TEST NUMBER TEST TYm RES EXCI T X RAT 500V INS RES 3 i AMP BURDEN 4 TESTED TAP xix aO TEST YTG RANGE 4 TEST CUR RANGE 2 0 eoo NAME PLAT E RATIO Looo TST NOTE tL Figure 22 Typical Test Plan Printout Table 5 Description of Test Plan Elements enr Description Number 1 Number of tests in test plan 1 2 Tests to be performed Resistance excitation turns ratio insula
39. TEST a4 13713 SETUP 15 12 TEST PLANS DIAGHOSTICS CURRENT SOURCE Press the 3 key TEST PLANS b The following screen will be displayed LOAD TEST FLAH TEST FLAH FLAH DIRECTORY EXTRACT TEST FLAH FRIHT TEST 6 ERASE TEST PLAH T COPY TO THUMB DRIVE On LA hi Press the 6 key ERASE TEST PLAN c The following screen will be displayed 1 ERASE IHTERHAL PLA 2 ERASE DRY PLAN Press the 2 key ERASE THMB DRV PLAN d The following screen will be displayed ERASE TEST FLAH ERASE SINGLE PLAH ERASE ALL FLAWS 1 ERASE SINGLE PLAN NE REV1 7 2000 USER S MANUAL 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 2 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 returned to the START UP menu Press the ENTER key to continue with the erasure process The following screen will be displayed while the
40. TUP 52 55 TEST PLAHS DIAGHOSTICS CURREHT SOURCE 1 2 3 4 d Press the 2 key SETUP b The following screen will be displayed 1 RECORD 2 RECORD 5 RECORD DIRECTORY 4 SAVE RESTORE RECORD a ERASE RECORD PAGE Press the 4 key SAVE RESTORE RECORD c The following screen will be displayed RESTORE RECORD 1 ENTER RECORD HUMBER 2 SCROLL TO SELECT If you have a USB Flash drive inserted the EZCT 2000C s USB port the following screen will be displayed instead of the above screen NOTE 1 RESTORE RECORD 2 COPY TO THUMB DRIVE Press the 1 key RESTORE RECORD The following screen will be displayed REV1 EZCT 2000C USER S MANUAL 1 INTERNAL STORAGE 2 THUME TRIVE Press the 1 key INTERNAL STORAGE The following screen will then be displayed RESTORE RECORD 1 ENTER RECORD HUMBER 2 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 RECORD HUMBER Type the record number using the keypad and then press the ENTER key The following screen will be displayed RECORD RESTORED PRIHT RECORD 1 YES 2 If you do not want to print the test record press the 2 key test record will be restored to the working memory and you
41. V 1 Internal Test Plan Storage The EZCT 2000C can store up to 128 CT test plans in Flash EEPROM A test plan is comprised of the excitation test voltage current range selection CT nameplate ratios and CT winding terminal combinations X1 to X5 for each test and also includes the insulation test definition Up to 10 test definitions can be stored per test plan The ability to store test plans makes CT testing an extremely simple process To perform a test the EZCT 2000C is connected to the CT terminals and a test plan is selected to run Creating test plans for the EZCT 2000C is also a simple process A test plan can be created using the EZCT 2000C s keypad or can be created on a PC with provided software and then downloaded to the EZCT 2000C via the USB port or Bluetooth For added convenience test plans can also be copied from a USB Flash drive to the EZCT 2000C via the USB Flash drive interface External Data Storage The EZCT 2000C features a USB Flash drive interface that makes it very convenient to store and transfer test records and test plans By using a USB Flash drive test records and test plans can be quickly transferred between a computer and the EZCT 2000C without the need to connect the unit to the computer 1 3 EZCT 2000C Plus Features CT Winding Insulation Resistance Test Feature The EZCT 2000C Plus can also measure the insulation resistance of the CT s secondary winding using a test voltage up to 1000 Vdc The DC
42. YE RESTORE RECORD ERASE 6 HEST PAGE Press the 6 key NEXT PAGE c The following screen will be displayed 1 SET TIME SET LANGUAGE BURIED CT DELTA POINT MARKER FAM DATA DISABLE H vTG CHECK Press the 1 key SET TIME d The following screen will be displayed HH MM SS Enter the month date time hours minutes and seconds 24 hour format using the keypad When the last digit is entered the clock will be set and you will be returned to the START UP menu EZCT 2000C USER S MANUAL REV1 4 44 Setting the Preferred Interface Language Follow the steps below to set the preferred language for the EZCT 2000C s interface English Spanish and Turkish are supported a Start from the START UP menu FUH TEST 85 62 13 SETUP 14 14 25 TEST PLAHS DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP b The following screen will be displayed RECORD FRIHT RECORD RECORD DIRECTOR SAVE RESTORE RECORD ERASE RECORD 6 HEST PAGE Cn E LH hi Press the 6 key NEXT PAGE c The following screen will be displayed 1 SEL FINE 2 SET LANGUAGE BURIED CT DELTA MARKER FAM DATA DISABLE H vTG CHECK Press the 2 key SET LANGUAGE d The following screen will be displayed 1 EHGLISH 2 TURKISH 5 SPANISH Select the preferre
43. ated before conducting any test with the EZCT 2000C Always ground the EZCT 2000C to 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 2000C 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 EZCT 2000C USER S MANUAL TABLE OF CONTENTS CONVENTIONS USED IN THIS 5 LU aua usu LAUDE 1 4407 pr S X 2 11 General Description and Features cernerent rne remeare mae etn annonam chan 2 1 2 Features EZCT 2000C and EZCT 2000C 2 1 3 EZCT 2000C Plus Feats aureo aen Po nb dad dn pn a rede baie dus 4 14 Ordering InformabiOl uuo ester tonta a Rote Du Maa etate sac ria Ue MERE EU media 5 1 5 Technical SP
44. cable set with banana jacks Replacement X cable set Replacement current and Megger cable set USB cable Large cable carrying duffel bag thermal printer paper case of 24 rolls EZCT 2000C USER S MANUAL REV1 1 5 Technical Specifications Table 2 EZCT 2000C Technical Specifications TYPE PHYSICAL SPECIFICATIONS INPUT POWER MEASUREMENT METHOD OUTPUT TEST VOLTAGES CURRENT SOURCE EZCT 2000C Plus Only CURRENT SOURCE DISPLAY EZCT 2000C Plus Only VOLTAGE READING RANGE CURRENT READING RANGE CT CURRENT RATIO RANGE PHASE ANGLE MEASUREMENT RESISTANCE READING RANGE INSULATION RESISTANCE TEST FEATURE EZCT 2000C Plus Only DISPLAY PRINTER COMPUTER INTERFACES EXTERNAL DATA STORAGE PC SOFTWARE INTERNAL TEST RECORD STORAGE INTERNAL TEST PLAN STORAGE SAFETY ENVIRONMENT CABLES WARRANTY Portable current transformer test set 19 W x 13 H x 16 D 48 3 cm x 33cm x 40 1 cm Weight 73 Ibs 33 1 kg 100 120 Vac or 200 240 Vac factory pre set 50 60 Hz ANSI IEEE C57 12 90 and ANSI IEEE C57 13 1 standards 0 50 Vac 10A max 0 300 Vac 10A max 0 500 Vac max 0 1200 Vac 1 2A max 0 2000 Vac 1A max 1 20 0 15 Vac Test current and current on time 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
45. d language by pressing the corresponding number on the keypad REV1 EZCT 2000C USER S MANUAL e Aconfirmation message will be displayed as shown below Press any key to return to the START UP menu Menu items and messages will now be displayed in the selected language EZCT 2000C USER S MANUAL REV1 4 5 Printing Raw Memory Buffer Data You can print the raw data from the EZCT 2000C 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 1 RUM TEST gemis 2 SETUP 15 14 25 5 TEST 4 DIAGHOSTICS a SOURCE Press the 2 key SETUP b The following screen will be displayed a RECORD ID FRIHT RECORD RECORD DIRECTORY SAVE RES RECORD ERASE HEAT PAGE Press the 6 key NEXT PAGE c The following screen will be displayed 1 SET TIME 2 SET LANGUAGE 5 BURIED CT IM DELTA 4 KHEE POINT MARKER 2 PRIHT RAW DATA DISABLE H VTG Press the 5 key PRINT RAW DATA The raw buffer data will be printed and you will be returned to the START UP menu REV1 7 2000 USER S MANUAL 4 6 Disabling the H Voltage Checking Feature The EZCT 2000C s H Voltage input can only handle voltage up to 100 Vac When a saturation test is being performed the unit monitors the H voltage and st
46. e Circuit Using an External Meter You can verify the excitation current lx sensed by the EZCT 2000C by using an external RMS ampere meter Follow the steps below to verify the EZCT 2000C s sense circuit a Connect the X cables to a power resistor and an RMS ampere meter as shown in Figure 27 b Select the EZCT 2000C s Diagnostics mode see section 5 1 Pressthe key to raise the V voltage d Verify the voltage displayed on the EZCT 2000C s LCD screen against the value displayed on the external RMS ampere meter e Press the STOP key to end the test POWER RESISTOR AC CURRENT SOURCE 0 20 EZCT 2000C Current Transformer Tester WAHL SH Vanguard Instruments Co Inc Ontario California USA EMERGENCY TURN OFF Figure 27 EZCT 2000C Verification Test Connections REV1 EZCT 2000C USER S MANUAL 5 4 Quickly Verifying the EZCT 2000C s Turns Ratio Circuit You can quickly verify the EZCT 2000C 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 28 b Connect the X2 test lead to the H2 test lead as shown in Figure 28 c Run a turns 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 AC
47. e displayed 1 LOAD TEST 2 UNLOAD TEST PLAH 5 PLAN DIRECTORY 4 EXTRACT TEST FLAH 5 TEST FLAW ERASE TEST FLAH T COPY TO THUMB DRIVE Press the 3 key PLAN DIRECTORY c The following screen will be displayed 1 IHTERHAL DIRECTORY 2 THUMB DRIVE DIR Press the 2 key THUMB DRIVE DIR d The following screen will be displayed while the test plan directory is being printed FRIHTIHG 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 21 EZCT 2000C USER S MANUAL REV1 THUMb DIR THUMB DRY FILENAME 1 lt lt lt NUMBER OF TESTS ccorrgexnmx STATION CIRCUIT CIRCUIT MODEL 2 22 lt lt lt COMMENTS VANGUARD LAB ax THUMB DRY FILENAME NUMBER OF TESTS COMPANY STATION CIRCUIT CIRCUIT MODEL EzcTz0o0095B5 COMMENT S VANGUARD LABS CIR 1 THUMS DRY FILENAME PLAN oo NUMBER OF TESTS a COMPANY STAT ION CIRCUIT CIRCUIT MODEL IOG0o0E E COMMENTS VANGUARD LAS 1 Figure 21 Typical USB Flash Drive Test Plan Directory Printout REV1 EZCT 2000C USER S MANUAL 3 5 4 Printing a Test Plan To print a test plan a Start from the START UP menu 1 RUM TEST 2 eETUF 18 14 25 3 TEST PLANS 4 DIAGHOSTICS a CURREHT SOURCE Press the 3 key TEST PLAN
48. e displayed Type the first number using the keypad REV1 EZCT 2000C USER S MANUAL Press the ENTER key The following screen will be displayed FLATE RATIO EHTER PLATE RATIO 1808 m a lama 3 8 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 EHTER TEST 1 NOTE Ti TO POSITIOH EHTER TO ACCEPT Use the keypad to enter a test note The test note field is 20 characters long One test note can be saved for each test Press the ENTER key when you are done typing the note h The following screen will be displayed CALC ERR VS 1 YES z H Press the 1 key YES Selecting this option will print the current ratio error table and current phase error table as part of the tabulated test results Please see Figure 11 items 19 and 20 EZCT 2000C USER S MANUAL REV1 j The following screen will be displayed Type the burden value using the keypad and then press the ENTER key The following screen will be displayed Type the Cos 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 The following screen will be displayed showing a summary
49. eatures a back lit LCD screen 240 x 128 pixels that is clearly viewable in both bright sunlight and low light levels An QWERTY style membrane keypad is used to enter test information and to control the unit s functions Built in Thermal Printer A 4 5 inch wide built in thermal printer can print the CT test results and excitation curves Computer Interface The EZCT 2000C can be used as a stand alone unit or can be computer controlled It can be connected to a PC via the USB port or wirelessly via Bluetooth In computer controlled mode using the included CT Analysis Software test records can be downloaded from the EZCT 2000C s memory or CT tests can be run from the PC Test plans can also be created with the provided software A test plan defines the various test parameters test voltage current range nameplate ratios etc and can be used to quickly perform tests Additionally tabulated test records are automatically exported to PDF Excel and XML formats for further analysis Internal Test Record Storage The EZCT 2000C can store up to 140 test records in Flash EEPROM Each record may contain up to 10 excitation curves burden test reports current ratio readings and polarity and DC resistance readings Test records can be recalled and printed on the built in thermal printer They can also be transferred to a PC using the USB port wirelessly via Bluetooth or via the USB Flash drive interface port EZCT 2000C USER S MANUAL RE
50. er To print the current test record in the working memory a Start from the START UP menu 1 FUH TEST 4 17 13 2 SETUP 18 14 25 5 TEST PLANS 4 DIAGHOSTICS a CURREMT SOURCE Press the 2 key SETUP b The following screen will be displayed RECORD ID PRIHT RECORD RECORD DIRECTOR SAVE RESTORE RECORD ERASE RECORD HEST PAGE rn be Press the 2 key PRINT RECORD c The following screen will be displayed FRIHT PTIOHS 1 FULL DATA 2 ABBREVIATED DATA If there is no test record in the working memory the following screen will be displayed NOTE HO SHOTS TO 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 EZCT 2000C USER S MANUAL REV1 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 REV1 7 2000 USER S MANUAL 3 4 4 Printing a Directory of Test Records Stored in the EZCT 2000C s Memory You can print a directory of all the test records stored in the EZCT 2000C s Flash EEPROM using the steps
51. firmation screen will be displayed Press any key to return to the START UP menu To re enable the H Voltage checking feature follow the steps above but select option 2 in step d REV1 EZCT 2000C 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 Vi and the X voltage excitation current 1 These values can then be verified using an external volt meter and ampere meter To perform a diagnostic test a 103 b C Start from the START UP menu 1 TEST BST 2 eETUF 15125 5 TEST PLAHS 4 DIAGNOSTICS d CURRENT SOURCE Press the 4 key DIAGNOSTICS The following screen will be displayed SELECT TAP 1 2 nl 55 3 ml n4 4 5 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 The following screen will be displayed SELECT VOLTAGE RANGE ag Tagy izay zaga 1 2 5 4 da Select the maximum output voltage on the X terminals by pressing the corresponding key 11 EZCT 2000C USER S MANUAL REV1 d The following screen will be displayed Press the ENTER key to c
52. gh a start up cycle and load the firmware Then the START UP menu will be displayed as shown below RUM TEST 04 15 15 SETUP 11 18 25 TEST DIAGHOSTICS CURRENT SOURCE Press the 1 key RUN TEST to start a test The following screen will be displayed 1 RES EXCIT RATIO EXCITATION amp RATIO ERCITATIONM ONLY RATIO OHLY RESISTAHCE amp EXCIT TEST OHLY IHSULATIOM TST Select the test type by pressing the corresponding key 1 5 The following screen will be displayed SELECT TAP 41 52 41 59 1 59 PAGE OF E LH pi e 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 If the selected test included an excitation test the following screen will be displayed SELECT VOLTAGE RANGE gy 208 208 1286 2080 EZCT 2000C USER S MANUAL REV 1 Select a test voltage range by pressing the corresponding key 1 5 Ifthe 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 If the selected test included a ratio test the following screen will be displayed 1 YES Press the 1 key if you would like to enter the CT nameplate values The following screen will b
53. gure 23 Graphic Report Showing Knee Point Marker M EZCT 2000C 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 24 and Figure 25 and also page 94 for further information you must first select the Buried CT in Delta option from the SETUP menu using the steps below a Start from the START UP menu 1 RUH TEST BSS 13 2 SETUP 16 24 25 5 TEST PLAHS 4 DIBGH STIC a CURREHT SOURCE Press the 2 key SETUP b The following screen will be displayed a RECORD IL FRIHT RECORD RECORD DIRECTORY SAVYE RES RECORD ERASE HEAT PAGE Press the 6 key NEXT PAGE c The following screen will be displayed TIME SET LANGUAGE BURIED CT IM DELTA POINT MARKER FRIHT RAM DATA DISABLE H VTG Press the 3 key BURIED IN DELTA d The following screen will be displayed 1 BURIED CT DELTA OW 2 BURIED DELTA REV1 EZCT 2000C USER S MANUAL Press the 1 key BURIED CT DELTA ON e The following screen will be displayed Press the 1 key YES f Thefollowing screen will be displayed Press any key to return to the START UP menu 4 2 2 Disabling the Buried CT in Transformer Delta Option To disable the
54. he Flash EEPROM You can erase individual or all test records stored in the EZCT 2000C s Flash EEPROM To erase a test record a Start from the START UP menu a RUM TEST 4 18 13 SETUP 18 14 25 TEST DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP b The following screen will be displayed lt RECORD ID a PRINT RECORD RECORD DIRECTORY SAVYE RESTORE RECORD ERASE RECORD HEST PAGE Press the 5 key ERASE RECORD c The following screen will be displayed ERASE RECORD 1 ERASE SINGLE REC 2 ERASE ALL RECORDS To The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000C s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed ERASE INTERNAL REC ERASE THUME IEY REC Press the 1 key ERASE INTERNAL REC The following screen will be displayed EZCT 2000C USER S MANUAL REV1 ERASE RECORD 1 ERASE SINGLE REC 2 ERASE ALL RECORDS STU TO 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 HUMBER Type the record number to be erased and press the ENTER key 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 instr
55. ion 12 Figure 4 Connections for insulation resistance measurement for a CT with 5 terminals 12 Figure 5 Connections for insulation resistance measurement for a CT with 2 terminals 13 Figure 6 EZCT 2000C CT Burden Test Cable Connection EZCT 2000C Plus Only 14 Figure 7 EZCT 2000C Typical Current Source Connection EZCT 2000C Plus Only 15 Figure 8 Bushing CT Connection on Delta 16 Figure 9 Bushing CT Connection on Y Transformer reni Rer tere n a e 16 Figure 10 Sample CT Name Plate odia epe le piper Mon 17 Figure 11 Typical EZCT 2000C Tabulated Report Printout 29 Figure 12 Typical EZCT 2000C Graphic Report with Multiple Plot Curves 31 Figure 13 EZCT 2000C Typical Burden Test Results Report 36 Figure 14 Connections for a typical high resistance measuring application 37 Figure 15 Connections for insulation resistance measurement for a CT with 5 terminals 37 Figure 16 Connections for insulation resistance measurement for CT with 2 terminals 37 Figure 17 EZCT 2000C Typical Insulation Resistance Test Results Report Printout 41 Figure 18 Typical Internal Test Record Directory
56. lowing screen will be displayed IHS RES TEST VOLTAGE 1 See 2 l gg Select the test voltage by pressing either the 1 key 500V or the 2 key 1000V REV1 7 2000 USER S MANUAL f Thefollowing screen will be displayed Connect the insulation resistance cables and then press the START key g The following screen will be displayed When the test is completed the test results will be displayed temporarily EZCT 2000C USER S MANUAL 1 The following screen will then be displayed 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 insulation resistance test results report is shown in Figure 17 Press the 2 key NO if you do not want to print the test results h The following screen will be displayed Press the 1 key YES to keep the test results i The following screen will be displayed Press the 1 key YES to save the record The following screen will be displayed momentarily j The following confirmation screen will then be displayed REV1 EZCT 2000C USER S MANUAL Press any key to return to the START UP menu EXCITATION TEST RESULTS COMPANY VANGUARD INSTRUMENTS STATION CIRCUIT MER ABB MODEL 2 22 lt lt lt SAN z600 2 COMMENT e NO COMMENT OPRERATOR YN TST NOTE Soov INSULATION RES TEST
57. n resistance test results This information will be printed only if you chose to run the insulation resistance test Please see section 3 3 2 step o for details REV1 EZCT 2000C USER S MANUAL 100 Y tte SA CHEATS E gt CT EXCITATION PLOT Tec 10750 KNEE MARKER MOL A MA 0 14 104 10A Figure 12 Typical EZCT 2000C Graphic Report with Multiple Plot Curves EZCT 2000C USER S MANUAL REV1 3 3 3 Performing a CT Burden Test EZCT 2000C Plus Only The CT burden test verifies the actual CT burden before putting the CT in service The CT s secondary burden is measured by injecting a 1A or 5A test current into the load To perform a CT burden test a Make connections per the figure below BURDEN AC CURRENT SOURCE 0 20 EZCT 2000C Current Transformer Tester EMERGENCY TURN OFF REV1 EZCT 2000C USER S MANUAL b Start from the START UP menu RUH TEST B4 16 13 sr TEST DIAGHOSTICS CURRENT SOURCE Press the 1 key RUN TEST c The following screen will be displayed a RES EXCIT RATIO EXCITATION amp RATIO EXCITATION RATIO OMLY RESISTANCE ERCIT BURDEN TEST ONLY INSULATION TST OHLY Press the 6 key BURDEN TEST ONLY d The following screen will be displayed ENTER TEST 1 Ti TO POSITI
58. n the EZCT 2000C s Flash EEPROM Any existing test plans in the EZCT 2000C s Flash EEPROM will not be over written The EZCT 2000C 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 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 2000C s Flash EEPROM It will be loaded into the working memory and you will be returned to the START UP menu REV1 EZCT 2000C USER S MANUAL 3 5 9 Running a Test Using a Loaded Test Plan Once a test plan has been loaded into the working memory see section 3 5 6 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 RUM TEST 83 719 713 SETUP pas 11 37 TEST PLAHS DIAGHOSTICS CURRENT SOURCE 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 LOATET 1 RUM WITH FROMPTS 2 RUM AUTOMOMOUSL 2 UNLOAD TEST FLAH 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 EHER
59. nt of turns of the secondary windings The alternative method to verify the CT turns ratio is shown in Figure 34 and Figure 35 REV1 EZCT 2000C USER S MANUAL Figure 33 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 V1 v3 Figure 33 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 34 and Figure 35 113 EZCT 2000C USER S MANUAL REV1 Figure 34 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 X1 X5 X2 X5 measured by the EZCT or any electronic TTR will be as follows Ratio v2 H1 X1 X2 X3 2 V2 4 5 H2 Figure 34 From the name plate of the CT show in table below the turns ration can be calculated as follows Ratio Terminal 1200 5A X1 X5 1000 5A X2 X5 Ratio
60. of the test parameters Press the START key to start the test REV1 7 2000 USER S MANUAL 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 will then be displayed EZCT 2000C USER S MANUAL REV1 When the testing is finished the test results graph will be displayed Press any key on the keypad to continue The following screen will be displayed 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 2000C tabulated test report printout is shown in Figure 11 A typical graphic report is shown in Figure 12 Press the 2 key NO if you do not want to print the test results p The following screen will be displayed Press the 1 key YES to keep the test results q The following screen will be displayed Press any key to continue EE REV1 EZCT 2000C USER S MANUAL r S t The following screen will be displayed Press the 2 key NO The following screen will be displayed Press the 2 key NO If you would like to run the insulation resistance test as well press the 1 key and then follow the instructions in section 3 3 4 steps c to f
61. ontinue e The following screen will be displayed and the V Vi and values will be continuously updated for 15 seconds You can press the or v 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 EZCT 2000C USER S MANUAL 5 2 Verifying the EZCT 2000C s V Sense Circuit Using an External Meter The excitation voltage V sensed by the EZCT 2000C be verified using an external RMS volt meter Follow the steps below to verify the EZCT 2000C s V sense circuit a b C Connect the X cables to an RMS volt meter as shown in Figure 26 Select the EZCT 2000C s Diagnostics mode see section 5 1 Press the key to raise the V voltage Verify the V voltage displayed on the EZCT 2000C LCD screen against the value displayed on the external volt meter Press the STOP key to end the test x2 VOLT METER x1 AC CURRENT SOURCE 0 20 EZCT 2000C Current Transformer Tester e w 9 DBE BA Vanguard Instruments Co Inc Ontario California USA EMERGENCY TURN OFF Figure 26 EZCT 2000C V Verification Test Connections EZCT 2000C USER S MANUAL REV1 5 3 Verifying the EZCT 2000C s I Sens
62. ops the saturation test if a voltage above 100 Vac is detected In certain noisy substation environments the unit may pick up a noise spike which may be interpreted as high voltage input to the H terminal causing the unit to stop the saturation test For such cases it may be necessary to disable the H Voltage monitoring feature so that a saturation test can be properly completed Follow the steps below to disable the H Voltage checking features If this feature is disabled an actual over voltage situation exists voltage over 100 Vac it will NOT be detected by the EZCT 2000C and can cause damage to the unit This feature should be disabled only after confirming that an actual over voltage situation does not exist WARNING a Start from the START UP menu T EUH TEST BST 13 2 SETUP 88 18 28 5 TEST PLANS 4 DIAGHOSTICS a CURREHT SOURCE Press the 2 key SETUP b The following screen will be displayed RECORD ID FRIHT RECORD RECORD DIRECTOR SAVE RES RECORD ERASE RECORD HEART PAGE Oy cn Le Ra ee Press the 6 key NEXT PAGE c The following screen will be displayed SET TIME SET LANGUAGE BURIED CT DELTA KHEE POINT MARKER FRIHT DATA DISABLE H YTG CHECK fe Le Press the 6 key DISABLE H VTG CHECK 101 EZCT 2000C USER S MANUAL 1 d The following screen will be displayed Press the 1 key YES e The following con
63. ps below to change the knee point marker for the excitation graph a Start from the START UP menu a TEST 85 82 15 SETUP Ae 115 28 TEST DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP b The following screen will be displayed a RECORD It RECORD RECORD DIRECTORY SAYE RESTORE RECORD ERASE HEST PAGE Press the 6 key NEXT PAGE c The following screen will be displayed 1 SET TIME 2 SET LANGUAGE 5 BURIED CT IM DELTA 4 POINT MARKER a FRIHT DATA DISABLE H VTG CHECK Press the 4 key KNEE POINT MARKER REV1 EZCT 2000C USER S MANUAL d The following screen will be displayed 1 IEEE DEGREE 2 IEEE 45 DEGREE 5 1644 5051 Press either the 1 key EEE 30 DEGREE the 2 key IEEE 45 DEGREE or the 3 key IEC 10 V gt 50961 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 23 ERRAN ERRAIN 100 j Knee Point Knee Point Marker L u pe 1 Y ji 11 gt J TH HL Ol Hl nan e Of a d 1 BEE D E E E f Ov RE ERG MLA MA 0 14 104 10 Fi
64. rolled via USB or optional Bluetooth wireless interface In addition to the above the EZCT 2000C Plus offers the following features e Measures the insulation resistance of the CT s secondary winding e Measures the CT s load burden e Provides a programmable current source 0 20 that be used to verify CT loads The EZCT 2000C s test leads can be connected to all the CT output terminals and the complete CT test can be performed automatically without any operator intervention 1 2 Common Features EZCT 2000C and EZCT 2000C Plus Excitation Test The CT excitation test is performed using the ANSI IEEE C57 13 1 test method Test voltage ranges from 50 300 500 1200 and 2000 Vac can be selected for the excitation test The test voltage is raised and lowered automatically by the EZCT 2000C The excitation test voltage and current data is collected and stored in the EZCT 2000C s internal memory Knee point voltages ANSI 10 50 IEC 60044 IEEE 30 IEEE 45 are calculated and printed on the test report All of the EZCT 2000C s test leads can be connected to the CT output terminals X1 X2 X3 X4 and X5 and there is no lead switching required during testing This convenient arrangement allows for testing any of the 10 possible combinations of X1 to X5 Up to 10 excitation tests can be stored in one record Once the test is completed the test report and CT excitation curves can be printed on the built in thermal printer Demagnetization The
65. s and indicators may seem obvious but users should become familiar with them before using the EZCT 2000C 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 ACCUWRZT E bm EZCT 2000C Transformer T Vanguard Instruments Co Inc Ontario California USA uw vanovano IMSTRUAMNTS COM Figure 1 EZCT 2000C Controls and Indicators EZCT 2000C USER S MANUAL REV1 Table 3 Functional Descriptions of EZCT 2000C Controls and Indicators kem Panel Markings Functional Description Number INSULATION Insulation resistance meter connectors 1 RESISTANCE METER Current transformer excitation voltage connectors Each set of connectors contains a test voltage connector and sensing connector The EZCT 2000C s X output terminals are rated to 2 200 Vac working voltage Any voltage above 2 200 Vac will damage the input circuitry 2 6 X1 X2 X3 X4 X5 H Current transformer primary input test cable connectors GROUND Grounding stud 9 AC receptacle 10 100 120Vac 12A Power switch with built in circuit breaker 50 60Hz 11 Back lit graphic LCD screen 128 x 64 viewable in bright sunlight and low light levels 12 HIGH VOLTAGE LED warning indicator that is illuminated when high voltage is present PRESENT 13 Rugged QWERTY style membrane keypad EMERGENCY Emergency turn off switch 14 TURN OFF
66. se se tu trem to EE decnaageecelosacdgedaugeteddonanadeennsedncdenioede 44 3 4 1 Restoring and Printing a Test Record From Flash EEPROM 44 3 4 2 Restoring and Printing a Test Record From a USB Flash Drive 48 3 4 3 Printing a Restored Test 4421 1 0 51 3 4 4 Printing a Directory of Test Records Stored in the EZCT 2000C s Memory 53 3 4 5 Printing a Directory of Test Records Stored in a USB Flash Drive 56 3 4 6 Copying Test Records to a USB Flash 58 3 4 7 Erasing Test Records From the Flash EEPROM 404 61 3 4 8 Erasing Test Records From a USB Flash Drive 64 3 5 Working With Test Plain 67 3 5 1 Extracting the Test Plan From a Test Record 67 3 5 2 Printing a Directory of Test Plans Stored in the EZCT 2000C s Memory 69 3 5 3 Printing a Directory of Test Plans Stored in a USB Flash Drive 71 35 4 Printing a Test Placa 73 3 5 5 Erasing Test Plans From the Flash EEPROM sss enne 75 3 5 6 Erasing Test Plans From a USB Flash 0022
67. sformer bushing CT connections for Delta and Y transformers are shown in Figure 8 and Figure 9 respectively CURRENT SOURCE Figure 2 Typical EZCT 2000C Excitation and Ratio Test Cable Connections EZCT 2000C USER S MANUAL REV1 Figure 3 Connections for a typical high resistance measuring application X2 X3 X4 TE 1 f Figure 4 Connections for a typical insulation resistance measurement for a CT with 5 terminals REV1 EZCT 2000C USER S MANUAL Figure 5 Connections for a typical insulation resistance measurement for a CT with 2 terminals EZCT 2000C USER S MANUAL REV1 CT LOAD BURDEN AC CURRENT SOURCE EZCT 2O000C Current Transformer Tester 0 20A 2 gite Figure 6 EZCT 2000C CT Burden Test Cable Connection EZCT 2000C Plus Only REV1 EZCT 2000C USER S MANUAL AC CURRENT SOURCE EZCT 2O000C Current Transformer Tester Y AP URN Vanguard Instruments Co Inc Q Ontario California USA Figure 7 EZCT 2000C Typical Current Source Connection EZCT 2000C Plus Only EZCT 2000C USER S MANUAL REV 1 0 NOTE JUMPER INSTALLATION ON SECONDARY WINDING H1 JUMPER EZCT CABLES TYP 3 PLACES H2 amp X2 x 1 EZCT B PHASE BUS
68. so asaa 21 o o0e7 1o 1638 4 22 o orses 124 69 1593 5 wes ace wea aam 1205 6 25 o ases 146 52 26 o 1e31 asae re 2 o 23e4 151 6 635 5 wee o 2721e 2 o 3624 155 091 s27 7 o se7rs ase 37 334 5 o asor 319 2 32 157 46 zeo0 9 35 7365 se 215 7 52 a6es 2 35 1 1eo07 ae1 27 s6 2 3521 161 81 aa 37 a v 163 17 23 0 16s eo a TABULATED GRAPH POINTS CUR lt A gt cv lt onms gt o o0ozo 1 06 2 89 723 5 o o0oso 3 92 eoe o o1ioo 5 o ozoo za re ss 25 1381 2 75 97 1519 5 125 79 52 1375 2 2000 aao rae c gt ass 50 156 721 313 4 159 26 160 160 6 o0o0oo a64 10 ez WINDING RES 307 1 m OHMS rec 107 50 az o0 VOLTS IEC 107 50 c o0m 5o AMPS reee 30 aza o0 o orTrre ames IEEE 30 vouTs o ceso AMPS reese 452 IEEE 45 Ikp 1 NAME PLATE RATIO 1000 5 MEASURED RATIO 199 97 PERCENT ERROR POLARITY OUT Or PHASE PHASE ANGLE 92 EXCITATION 78 9 VOLTS Sx lt CITATION cur 16 AM
69. st 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 REV1 EZCT 2000C USER S MANUAL 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 2000C s USB Flash drive port USB MEM port Then start from the START UP menu RUE TEST H4 19 13 SETUP 18 10 10 TEST PLANS DIAGHOSTICS CURRENT SOURCE Press the 3 key TEST PLANS The following screen will be displayed 1 LOAD TEST UNLOAD TEST FLAH DIRECTORY EXTRACT TEST FRIHT TEST FLAH ERASE TEST FLAH CORY TO THUME DRIVE Uh OB LH pd Press the 1 key LOAD TEST PLAN The following screen will be displayed 1 IHTERHRAL STORAGE 2 THUMB DRIVE Press the 2 key THUMB DRIVE The following screen will be displayed LOAD TEST HUMBER EZCT 2000C USER S MANUAL REV1 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 e The following screen will be displayed manc LOADED SAVE PLAH 1 YES 2 1 YES Press the 1 key if you would like the loaded test plan to be also saved i
70. t were selected for this test 3 Test note for this particular test The test note can be up to 20 characters long 4 Recorded excitation current readings on the CT secondary winding 5 Recorded excitation test voltages applied to the CT secondary winding 6 Impedance calculated at each data point 7 The voltage current and impedance data points recorded on the graph grid marks 8 Measured DC resistance value of CT under test 9 IEC 10 50 knee point voltage and excitation current IEC 60044 1 10 50 This knee point voltage is the same as the ANSI 10 50 knee point voltage 10 IEEE 30 knee point voltage and excitation current 11 IEEE 45 knee point voltage and excitation current 12 CT nameplate turns ratio 13 Measured turns ratio 14 Turns ratio percentage error 15 Polarity of the CT 16 Measured phase angle 17 Excitation voltage used in CT turns ratio test 18 Excitation current in turns ratio test 19 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 20 Current phase 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 21 Burden test results This information will be printed only if you chose to run the burden test Please see section 3 3 2 step p for details 22 Insulatio
71. the ENTER key If you do not know the record number you can print a test record directory Please see section 3 4 5 for details f The following screen will be displayed while the record is being restored RESTORIHG THUME DRIVE REC BB PLEASE WAIT The following screen will be displayed once the test record has been restored RECORD 861 RESTORED PRIHT RECORD 1 VES 2 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 g g The following screen will be displayed FRIHT OPTIONS 1 FULL DATA 2 ABBREVIATED DATA 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 EZCT 2000C USER S MANUAL REV1 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 START UP menu REV1 7 2000 USER S MANUAL 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 or a USB Flash drive see section 3 4 1 or you can restore it to the working memory and print it lat
72. tion and CT load burden 3 Insulation test voltage 500 Vdc 4 Injection current for load burden test 1 A 5 Terminals used for excitation test X1 X2 6 Maximum excitation voltage 300 V 7 Maximum excitation current 2 0 A 8 CT nameplate ratio 1000 5 9 Test notes if any REV1 EZCT 2000C USER S MANUAL 3 5 5 Erasing Test Plans From the Flash EEPROM To erase one or all test plans from the EZCT 2000C s Flash EEPROM a Start from the START UP menu a TEST 11 11 11 TEST PLANS DIAGHOSTICS CURRENT SOURCE Press the 3 key TEST PLANS b The following screen will be displayed 1 LOAD TEST 2 UNLOAD TEST PLAH 5 PLAH DIRECTORY 4 EXTRACT TEST FLAH PRIMT TEST 6 ERASE TEST T COPY TO THUMB DRIVE Press the 6 key ERASE TEST PLAN c The following screen will be displayed ERASE TEST FLAH ERASE SINGLE FLAH ERASE ALL PLANS The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT 2000C s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed NOTE 1 ERASE INTERNAL PLAH 2 ERASE DR FLAH Press the 1 key ERASE INTERNAL PLAN The following screen will be displayed EZCT 2000C USER S MANUAL 1 ERASE TEST FLAH 1 ERASE SIHGLE FLAH 2 ERASE ALL PLANS Continue with the steps below 1 ERASE SINGLE PLAN Press the
73. uced 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 2000C 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 2000C USER S MANUAL REV1 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 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 a TEST 4 15 13 SETUP 18 15 25 a TEST DIAGHOSTICS CURRENT SOURCE Press the 2 key SETUP b The following screen will be displayed 1 RECORD 2 FRIHT RECORD RECORD DIRECTORY SAVYE RESTORE RECORD ERASE FECORD HEST PAGE Press the 1 key RECORD ID c The following screen will be displayed COMPANY VAHGUART 14 TO POSITION TO ACCEPT Type the company name using the keypad and then press the ENTER key REV1 EZCT 2000C USER S MANUAL d The following screen will be displayed STRTIOH LAB
74. uctions in section 3 4 4 The following screen will be displayed momentarily ERASING RECORD HUMBER Gi PLEASE WAIT Then the following confirmation screen will be displayed RECORD HUMBER 1 ERASET Press any key to return to the START UP menu REV1 EZCT 2000C USER S MANUAL 2 ERASE ALL RECORDS Press the 2 key if you would like to erase all of the test records stored in the EZCT 2000C s flash EEPROM The following confirmation screen will be displayed ERASE ALL RECORDS ARE OU SURE ENTER TO CONTINUE 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 ERASIHG 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 EZCT 2000C USER S MANUAL REV1 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 2000C s USB Flash drive port USB port Then start from the START UP menu TEST 4 18 13 SETUP 11 27 59 TEST
75. 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 2000C USER S MANUAL REV 1 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 SCROLL TO SCROLL Press the or the v key to display the next or previous test record respectively The test record information will be displayed as shown tti B4 17 13 18 11 5 TESTS LAB CIR 1 EZCTZBaBBB oM 1 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 RECORD TES 2 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 d d The following screen will be displayed OPTIONS 1 FULL DATA 2 ABBREVIATED DATA REV1 EZCT 2000C USER S MANUAL 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
76. winding resistance reading range is from 2 to 500 Mega ohms The insulation resistance test results are displayed and printed on the report CT Burden Test The EZCT 2000C Plus can measure the CT s actual connected burden by injecting a 1A or 5A test current into the load The CT burden measurements Voltage current Cos and burden impedance are displayed on the screen and printed on the test report This important test verifies the actual CT measured burden before putting the CT in service thus avoiding any potential configuration conflicts Current Source The EZCT 2000C Plus offers an optional programmable current source 0 20A 0 15Vac that can be used to verify CT loads The on time timer and output current are displayed on the LCD screen REV1 EZCT 2000C USER S MANUAL 1 4 Ordering Information To order additional EZCT 2000C units or accessories please contact your Vanguard Instruments sales representative and reference the part numbers listed in Table 1 Please visit our web site at http www vanguard instruments com sales reps to find your nearest Vanguard Instruments sales representative Part Number 9019 UC 9034 UC 9019 SC 9019 IC 8000 0157 8000 0108 8000 0109 8000 0005 8000 0017 TP4 CS Table 1 Ordering Information Description EZCT 2000C 110V Unit and Cables EZCT 2000C 220V Unit and Cables EZCT 2000C Shipping Case EZCT 2000C Insulation Resistance Test and Current Source Feature Replacement H

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

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