Vanguard EZCT-2000B User Manual
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Vanguard EZCT-2000B User Manual

Digital current-transformer tester
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DIGITAL CURRENT-TRANSFORMER TESTER
Vanguard Instruments Company, Inc.
1520 S. Hellman Ave.
Ontario, California 91761, USA
TEL: (909) 923-9390
FAX: (909) 923-9391
EZCT-2000B
USER'S MANUAL
TM
July 2009
Revision 1

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  • Page 1 EZCT-2000B DIGITAL CURRENT-TRANSFORMER TESTER USER’S MANUAL Vanguard Instruments Company, Inc. 1520 S. Hellman Ave. Ontario, California 91761, USA TEL: (909) 923-9390 July 2009 FAX: (909) 923-9391 Revision 1...
  • Page 2 SAFETY WARNINGS AND CAUTIONS The EZCT-2000B can produce a voltage up to 2,000 Vac that can cause severe injury and/or equipment damage. Due to this reason, the EZCT-2000B shall be used only by trained operators.

  • Page 3: Table Of Contents

    Restoring and Printing a Test Record From a USB Flash Drive ......46 3.4.3. Printing a Restored Test Record ................48 3.4.4. Printing a Directory of Test Records Stored in the EZCT-2000B’s Memory ... 50 3.4.5. Printing a Directory of Test Records Stored in a USB Flash Drive ......53 3.4.6.
  • Page 4 LIST OF FIGURES Figure 1. EZCT-2000B Controls and Indicators ................6 Figure 2. Typical EZCT-2000B Excitation and Ratio Test Cable Connection ......... 10 Figure 3. EZCT-2000B Insulation Resistance Test Cable Connection ..........11 Figure 4. EZCT-2000B CT Burden Test Cable Connection ............. 12 Figure 5.

  • Page 5: Conventions Used In This Document

    CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions: [KEY] • A key or switch on the EZCT-2000B is indicated as • Menu options are referenced as (MENU OPTION). • Screen and menu names are referenced as “SCREEN/MENU NAME”.

  • Page 6: Introduction

    Knee point voltages (ANSI 10/50, IEC 10/50, IEEE-30, IEEE-45) are calculated and printed on the test report. All of the EZCT-2000B’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.
  • Page 7 USB port, or via the USB Flash drive interface port. Internal Test Plan Storage Capacity The EZCT-2000B can store up to 128 CT test plans in Flash EEPROM. 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 and CT load burden test definitions.

  • Page 8: Furnished Test Accessories

    PC. A Windows® XP/Vista-based Current Transformer Analysis software application is provided with the EZCT-2000B and can be used to transfer test records from the EZCT-2000B to a PC. Test plans can also be created with the provided software. Additionally, tabulated test records can be exported to Microsoft®...

  • Page 9: Technical Specifications

    REV 1 EZCT-2000B USER’S MANUAL Technical Specifications Table 1. EZCT-2000B Technical Specifications TYPE Portable current-transformer test set PHYSICAL SPECIFICATIONS 19”W X 13”H x 15.8” D (48.3 cm x 33.0 cm x 40.1 cm); Weight: 73 lbs (33.1 INPUT POWER 100 – 120 Vac or 200 – 240 Vac (factory pre-set), 50/60 Hz MEASUREMENT METHOD ANSI/IEEE C57.12.90, IEC 60044-1, and ANSI/IEEE C57.13.1 standards...

  • Page 10: Ezct-2000B Controls And Indicators

    REV 1 EZCT-2000B Controls and Indicators The EZCT-2000B’s controls and indicators are shown in Figure 1 below. A leader line with an index number points to each control and indicator, which is cross-referenced to a functional description in Table 2. The table describes the function of each item on the control panel. The purpose of the controls and indicators may seem obvious, but users should become familiar with them before using the EZCT-2000B.

  • Page 11: Table 2. Functional Descriptions Of Ezct-2000B Controls And Indicators

    RESISTANCE METER Current transformer excitation voltage connectors. Each set of connectors contains a test voltage connector and sensing connector. The EZCT-2000B’s X X1, X2, X3, X4, X5 output terminals are rated to 2000 Vac working voltage. Any voltage above 2000 Vac will damage the input circuitry.

  • Page 12: Pre-Test Setup

    EZCT-2000B USER’S MANUAL REV 1 PRE-TEST SETUP Operating Voltages The EZCT-2000B’s operating voltage is preset at the factory for 100-120 Vac, 50/60 Hz or 200- 240 Vac, 50/60 Hz. LCD Screen Contrast Control [PAPER ∧ Contrast] To increase the LCD screen contrast, press and hold the key for two seconds.
  • Page 13 The thermal paper will show a red stripe to indicate that the roll is about to run out of paper. Computer Interface Ports The EZCT-2000B features one USB and one RS-232C PC interface port. A Windows-based “Current Transformer Analysis” software application is supplied with the EZCT-2000B. For further information, please see the software user’s manual.

  • Page 14: Operating Procedures

    Always connect the EZCT-2000B to the substation ground before connecting any test cables. The EZCT-2000B 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.

  • Page 15: Figure 3. Ezct-2000B Insulation Resistance Test Cable Connection

    REV 1 EZCT-2000B USER’S MANUAL Figure 3. EZCT-2000B Insulation Resistance Test Cable Connection...

  • Page 16: Figure 4. Ezct-2000B Ct Burden Test Cable Connection

    EZCT-2000B USER’S MANUAL REV 1 Figure 4. EZCT-2000B CT Burden Test Cable Connection...

  • Page 17: Figure 5. Ezct-2000B Typical Current Source Connection

    REV 1 EZCT-2000B USER’S MANUAL Figure 5. EZCT-2000B Typical Current Source Connection...

  • Page 18: Figure 6. Bushing Ct Connection On Delta Transformer

    EZCT-2000B USER’S MANUAL REV 1 Figure 6. Bushing CT Connection on Delta Transformer Figure 7. Bushing CT Connection on Y Transformer...

  • Page 19: Ezct-2000B X Input Voltage Warning

    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-2000B and the excitation test is performed on the X1-X2 terminals, the voltage induced at the X1-X4 terminals will exceed 2,000 Vac as the voltage across the X1-X2 terminals increases above 250 Vac.

  • Page 20: Performing Tests

    EZCT-2000B USER’S MANUAL REV 1 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.
  • Page 21 REV 1 EZCT-2000B USER’S MANUAL d. The following screen will be displayed: STATION: ↑↓ TO POSITION "enter" to accept [ENTER] Type the station name using the alpha-numeric keypad and then press the key. e. The following screen will be displayed:...
  • Page 22 EZCT-2000B USER’S MANUAL REV 1 h. The following screen will be displayed: SERIAL NUMBER: 26002 ↑↓ TO POSITION "enter" to accept [ENTER] Type the serial number using the alpha-numeric keypad and then press the key. i. The following screen will be displayed:...

  • Page 23: Performing Resistance, Excitation, And Ratio Tests

    The following procedure describes the general steps for performing excitation, resistance, and ratio tests. a. When the EZCT-2000B is turned on, it will first go through a start-up cycle and load the firmware. Then the “START-UP” menu will be displayed as shown below: 1.
  • Page 24 EZCT-2000B USER’S MANUAL REV 1 e. If the selected test included an excitation test, the following screen will be displayed: SET TEST CURRENT: 1. 0.2A 2. 0.5A 3. 1A 4. 2A 5. 5A 6. 10A Select the maximum test current for the excitation test by pressing the corresponding key ( f.
  • Page 25 REV 1 EZCT-2000B USER’S MANUAL [ENTER] Press the key. The following screen will be displayed: ENTER PLATE RATIO: ENTER PLATE RATIO: 1000 : 0.0 1000 : 5.0 [ENTER] Type the second number using the keypad and then press the key.
  • Page 26 EZCT-2000B USER’S MANUAL REV 1 i. The following screen will be displayed: ENTER BURDEN VA: (500.0 max) [ENTER] Type the burden value using the keypad and then press the key. j. The following screen will be displayed: ϕ ENTER cos (0.00 - 1.00)
  • Page 27 REV 1 EZCT-2000B USER’S MANUAL m. If the selected test included a resistance test, the following screen will be displayed momentarily: CABLES ENERGIZED! 300V 1.0A x1-x2 DC RESISTANCE TEST The following screen will then be displayed: CABLES ENERGIZED! 300V 1.0A x1-x2 Ω...
  • Page 28 (YES) if you would like to print the test results. The test results will be printed on the thermal printer. A typical EZCT-2000B tabulated test report printout is shown in Figure 9. A typical graphic report is shown in Figure 10.
  • Page 29 REV 1 EZCT-2000B USER’S MANUAL r. The following screen will be displayed: RUN ANOTHER TEST? 1. YES 2. NO Press the key (NO). s. The following screen will be displayed: RUN INSUL RES TEST? 1. YES 2. NO Press the key (NO).
  • Page 30 The following confirmation screen will then be displayed: RECORD NUMBER 1 has been saved! The test record number is automatically assigned to each test record stored in the EZCT-2000B’s Flash EEPROM. NOTE Press any key to return to the “START-UP” menu.

  • Page 31: Figure 9. Typical Ezct-2000B Tabulated Report Printout

    REV 1 EZCT-2000B USER’S MANUAL Figure 9. Typical EZCT-2000B Tabulated Report Printout...

  • Page 32: Table 3. Descriptions Of Tabulated Test Results Elements

    Number Test record header information. The EZCT-2000B X terminals (taps) that were selected for this test. Test note for this particular test. The test note can be up to 20-characters long. Recorded excitation current readings on the CT secondary winding.

  • Page 33: Figure 10. Typical Ezct-2000B Graphic Report With Multiple Plot Curves

    REV 1 EZCT-2000B USER’S MANUAL Knee Point Marker Figure 10. Typical EZCT-2000B Graphic Report with Multiple Plot Curves...

  • Page 34: Performing A Ct Burden Test

    EZCT-2000B USER’S MANUAL REV 1 3.3.3. Performing a CT Burden Test 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.
  • Page 35 REV 1 EZCT-2000B USER’S MANUAL Press the key (RUN TEST). c. The following screen will be displayed: 1. Res, excit & ratio 2. excitation & ratio 3. excitation only 4. ratio only 5. resistance & excit 6. burden test only 7.
  • Page 36 EZCT-2000B USER’S MANUAL REV 1 g. The following screen will be displayed: CABLES ENERGIZED! I=0.0016 AMPS V= 1.2 The “HIGH VOLTAGE PRESENT” light will be illuminated to indicate that high voltage is present. NOTE The following screen will be displayed momentarily: CABLES ENERGIZED! PLEASE WAIT...
  • Page 37 REV 1 EZCT-2000B USER’S MANUAL Then, the following screen will be displayed: print test results? 1. YES 2. NO Print the 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 11.

  • Page 38: Figure 11. Ezct-2000B Typical Burden Test Results Report Printout

    SAVING RECORD... PLEASE WAIT... l. The following confirmation screen will then be displayed: RECORD NUMBER 1 has been saved! [ENTER] Press the key and you will be returned to the “START-UP” menu. Figure 11. EZCT-2000B Typical Burden Test Results Report Printout...

  • Page 39: Performing An Insulation Resistance Test

    REV 1 EZCT-2000B USER’S MANUAL 3.3.4. Performing an Insulation Resistance Test To perform an insulation resistance test: a. Make connections per the figure below: b. Start from the “START-UP” menu: 1. RUN TEST 06/17/09 2. SETUP 10:14:25 3. TEST PLANS 4.
  • Page 40 EZCT-2000B USER’S MANUAL REV 1 c. The following screen will be displayed: 1. Res, excit & ratio 2. excitation & ratio 3. excitation only 4. ratio only 5. resistance & excit 6. burden test only 7. insulation tst only Press the key (INSULATION TST ONLY) d.
  • Page 41 REV 1 EZCT-2000B USER’S MANUAL g. The following screen will be displayed: CABLES ENERGIZED! INSULATION RES TEST The “HIGH VOLTAGE PRESENT” light will be illuminated to indicate that high voltage is present. NOTE When the test is completed, the test results will be displayed temporarily: CABLES ENERGIZED! 493.7 V...
  • Page 42 EZCT-2000B USER’S MANUAL REV 1 h. The following screen will be displayed: KEEP THIS TEST? 1. YES 2. NO Press the key (YES) to keep the test results. i. The following screen will be displayed: TEST 1 SAVED [ENTER] Press the key to continue.

  • Page 43: Figure 12. Ezct-2000B Typical Insulation Resistance Test Results Report Printout

    PLEASE WAIT... l. The following confirmation screen will then be displayed: RECORD NUMBER 1 has been saved! [ENTER] Press the key and you will be returned to the “START-UP” menu. Figure 12. EZCT-2000B Typical Insulation Resistance Test Results Report Printout...

  • Page 44: Performing A Current Source Test

    REV 1 3.3.5. Performing a Current Source Test The EZCT-2000B’s programmable current source can be used to verify CT loads. The EZCT- 2000B can output up to a 20A current (0-15Vac). To perform a current source test: a. Make connections per the figure below: b.
  • Page 45 A timer will display the elapsed time that the current has been on. The EZCT-2000B is thermally protected and will automatically shut off if the transformer reaches an over-temperature condition. Since the EZCT-2000B can provide up to a 20A current, the transformer can get to thermal NOTE protection mode if operated for a long time at a high current.

  • Page 46: 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-2000B’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.
  • Page 47 REV 1 EZCT-2000B USER’S MANUAL 1. INTERNAL STORAGE 2. THUMB DRIVE Press the key (INTERNAL STORAGE). The following screen will then be displayed: RESTORE RECORD 1. enter record number 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 key.
  • Page 48 EZCT-2000B USER’S MANUAL REV 1 2. SCROLL TO SELECT Press the key if you would like to scroll through a directory of the stored test records. The following screen will be displayed: RECORD DIRECTORY "UP" TO SCROLL FWD "DWN" TO SCROLL RVS [PAPER ∧...
  • Page 49 REV 1 EZCT-2000B USER’S MANUAL d. The following screen will be displayed: PRINT OPTIONS: 1. FULL DATA 2. ABBREVIATED data Press the 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”...

  • Page 50: Restoring And Printing A Test Record From A Usb Flash Drive

    REV 1 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-2000B’s working memory using the steps below: a. Make sure the USB Flash drive containing the test record(s) is inserted in the EZCT- 2000B’s USB Flash drive port (“USB MEM”...
  • Page 51 REV 1 EZCT-2000B USER’S MANUAL e. The following screen will be displayed: RESTORE THUMB DRIVE REC_ [ENTER] Type the record number that you would like to restore and press the key. If you do not know the record number, you can print a test record directory. Please see section 3.4.5 for details.

  • Page 52: Printing A Restored Test Record

    EZCT-2000B USER’S MANUAL REV 1 3.4.3. Printing a Restored Test Record You can print a test record at the time that it is restored from the Flash EEPROM (see section 3.4.1), or you can restore it to the working memory and print it later. To print the current test record in the working memory: a.
  • Page 53 REV 1 EZCT-2000B USER’S MANUAL Press the 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 key to print the test report and graphic results on the thermal printer, without the excitation voltage and current data points.

  • Page 54: Printing A Directory Of Test Records Stored In The Ezct-2000B's Memory

    REV 1 3.4.4. Printing a Directory of Test Records Stored in the EZCT-2000B’s Memory You can print a directory of all the test records stored in the EZCT-2000B’s Flash EEPROM using the steps below: a. Start from the “START-UP” menu: 1.
  • Page 55 The short directory option prints the last 10 records stored in the EZCT-2000B’s Flash EEPROM. The short directory listing will be printed on the thermal printer and you will be...

  • Page 56: Figure 13. Typical Internal Test Record Directory Printout

    EZCT-2000B USER’S MANUAL REV 1 Figure 13. Typical Internal Test Record Directory Printout...

  • Page 57: 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. Make sure the USB Flash drive is inserted in the EZCT-2000B’s USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu: 1.

  • Page 58: Figure 14. Typical Usb Flash Drive Record Directory Printout

    EZCT-2000B USER’S MANUAL REV 1 Figure 14. Typical USB Flash Drive Record Directory Printout...

  • Page 59: Copying Test Records To A Usb Flash Drive

    EZCT-2000B USER’S MANUAL 3.4.6. Copying Test Records to a USB Flash Drive You can easily copy test records stored in the EZCT-2000B’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-2000B’s Flash drive port (“USB MEM”...
  • Page 60 1. COPY SINGLE RECORD Press the key (COPY SINGLE RECORD) if you would like to copy a single record from the EZCT-2000B to the USB Flash drive. The following screen will be displayed: ENTER RECORD NUMBER to copy to flash drv...
  • Page 61 2. COPY ALL RECORDS Press the key (COPY ALL RECORDS) if you would like to copy all the test records from the EZCT-2000B to the USB Flash drive. The following screen will be displayed: SAving record 1 to thumb drive Please wait...

  • Page 62: Erasing Test Records From The Flash Eeprom

    EZCT-2000B USER’S MANUAL REV 1 3.4.7. Erasing Test Records From the Flash EEPROM You can erase individual or all test records stored in the EZCT-2000B’s Flash EEPROM. To erase a test record: a. Start from the “START-UP” menu: 1. RUN TEST 06/17/09 2.
  • Page 63 REV 1 EZCT-2000B USER’S MANUAL ERASE RECORD 1. ERASE SINGLE REC. 2. ERASE ALL RECORDS Continue with the steps below: 1. ERASE SINGLE REC. Press the key if you would like to erase a single record. The following screen will be displayed:...
  • Page 64 REV 1 2. ERASE ALL RECORDS Press the key if you would like to erase all of the test records stored in the EZCT-2000B’s flash EEPROM. The following confirmation screen will be displayed: ERASE ALL RECORDS! Are you sure? "ENTER" TO CONTINUE.

  • Page 65: 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-2000B’s USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu: 1.
  • Page 66 EZCT-2000B USER’S MANUAL REV 1 d. The following screen will be displayed: ERASE RECORD 1. ERASE SINGLE REC. 2. ERASE ALL RECORDS "STOP" TO EXIT 1. ERASE SINGLE REC. Press the key (ERASE SINGLE REC.) if you would like to erase a single record.
  • Page 67 REV 1 EZCT-2000B USER’S MANUAL 2. ERASE ALL RECORDS Press the 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...

  • Page 68: Working With Test Plans

    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-2000B’s Flash EEPROM. The ability to use test plans makes CT testing an extremely simple process. To perform a test, the EZCT-2000B is connected to the CT terminals and a test plan is selected to run.
  • Page 69 The test plan will be extracted from the test record in the working memory and will be saved to the EZCT-2000B’s Flash EEPROM as a new test plan. The test plan number will be automatically incremented by the EZCT-2000B.

  • Page 70: Printing A Directory Of Test Plans Stored In The Ezct-2000B's Memory

    REV 1 3.5.2. Printing a Directory of Test Plans Stored in the EZCT-2000B’s Memory You can print a directory of all the test plans stored in the EZCT-2000B’s Flash EEPROM using the steps below: a. Start from the “START-UP” menu: 1.

  • Page 71: Figure 15. Typical Ezct-2000B Flash Eeprom Test Plan Directory Printout

    EZCT-2000B USER’S MANUAL You will be automatically returned to the “START-UP” menu after the directory printing is finished. A typical Flash EEPROM test plan directory printout is shown in Figure 15. Figure 15. Typical EZCT-2000B Flash EEPROM Test Plan Directory Printout...

  • Page 72: 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-2000B’s USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu: 1.

  • Page 73: Figure 16. Typical Usb Flash Drive Test Plan Directory Printout

    REV 1 EZCT-2000B USER’S MANUAL Figure 16. Typical USB Flash Drive Test Plan Directory Printout...

  • Page 74: Printing A Test Plan

    EZCT-2000B USER’S MANUAL REV 1 3.5.4. Printing a Test Plan To print a test plan: a. Start from the “START-UP” menu: 1. RUN TEST 06/17/09 2. SETUP 10:14:25 3. TEST PLANS 4. DIAGNOSTICS 5. CURRENT SOURCE Press the key (TEST PLANS).

  • Page 75: Table 4. Description Of Test Plan Elements

    REV 1 EZCT-2000B USER’S MANUAL Figure 17. Typical Test Plan Printout Table 4. Description of Test Plan Elements Item Description Number Number of tests in test plan (1) Tests to be performed (Resistance, excitation, turns ratio, insulation, and CT load burden)

  • Page 76: Erasing Test Plans From The Flash Eeprom

    2. ERASE ALL PLANS The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT-2000B’s USB Flash drive port. If a USB Flash drive is connected, the following screen will be displayed: NOTE 1.
  • Page 77 REV 1 EZCT-2000B USER’S MANUAL ERASE TEST PLAN 1. ERASE SINGLE PLAN 2. ERASE ALL PLANS Continue with the steps below: 1. ERASE SINGLE PLAN Press the key if you would like to erase a single test plan. The following...
  • Page 78 EZCT-2000B USER’S MANUAL REV 1 ERASE ALL PLANS! Are you sure? "ENTER" TO CONTINUE. [STOP] If you would like to cancel the erasure process, press the key. No test plans will be erased and you will be returned to the “START-UP” menu.

  • Page 79: Erasing Test Plans From A Usb Flash Drive

    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-2000B’s USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu: 1.
  • Page 80 EZCT-2000B USER’S MANUAL REV 1 Press the key (ERASE SINGLE PLAN) if you would like to erase a single plan from the USB Flash drive. The following screen will be displayed: ERASE THUMB DRIVE PLAN_ [ENTER] Type the test plan number that you would like to erase and press the key.
  • Page 81 REV 1 EZCT-2000B USER’S MANUAL ERASING all thumb drive test plans PLEASE WAIT... The following screen will be displayed after all of the test plans have been erased from the USB Flash drive: all thumb drive test plans erased! Press any key to return to the “START-UP” menu.

  • Page 82: Loading A Test Plan From The Ezct-2000B's Flash Eeprom

    LOAD TEST PLAN NUMBER: The above screen will be displayed only if a USB Flash drive is NOT connected to the EZCT-2000B’s USB Flash drive port. If a USB Flash drive is connected, the following screen will be displayed: NOTE 1.
  • Page 83 REV 1 EZCT-2000B USER’S MANUAL LOAD TEST PLAN NUMBER: Continue with the steps below: [ENTER] Type the test plan number that you would like to load and press the key. If you do not know the test plan number, you can print a test plan directory using the instructions in section 3.5.2.

  • Page 84: Loading A Test Plan From A Usb Flash Drive

    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-2000B’s USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu: 1.
  • Page 85 Press the key if you would like the loaded test plan to be also saved in the EZCT-2000B’s Flash EEPROM. Any existing test plans in the EZCT-2000B’s Flash EEPROM will not be over-written. The EZCT-2000B will automatically assign a new test plan number and store the test plan in the next available memory location.

  • Page 86: Running A Test Using A Loaded Test Plan

    The following screen will be displayed: CABLES WILL BE ENERGIZED! "START" TO BEGIN [START] Press the key and the EZCT-2000B will start running the test per the test plan settings. The screen will be updated with the test status.
  • Page 87 REV 1 EZCT-2000B USER’S MANUAL When the test has finished, the following screen will be displayed: SAVE THIS RECORD? 1. YES 2. NO Press the key (YES) to save the record. The following screen will be displayed momentarily: SAVING RECORD...
  • Page 88 "START" to begin [START] Press the key to begin the test. e. The EZCT-2000B will start performing the test per the test plan parameters. When the test has finished, the following screen will be displayed: ANY KEY TO CONTINUE =63.4 =0.3174...
  • Page 89 REV 1 EZCT-2000B USER’S MANUAL g. The following screen will be displayed: KEEP THIS TEST? 1. YES 2. NO Press the key (YES) to keep the test results. h. The following screen will be displayed: TEST 2 SAVED Press any key to continue.
  • Page 90 EZCT-2000B USER’S MANUAL REV 1 The following confirmation screen will then be displayed: RECORD NUMBER 2 has been saved! Press any key to return to the “START-UP” menu.

  • Page 91: Unloading A Test Plan From The Working Memory

    REV 1 EZCT-2000B 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. RUN TEST 06/17/09 2.

  • Page 92: Changing Setup Parameters

    EZCT-2000B USER’S MANUAL REV 1 CHANGING SETUP PARAMETERS Setting the Knee Point Marker Use the steps below to change the knee point marker for the excitation graph: a. Start from the “START-UP” menu: 1. RUN TEST 06/17/09 2. SETUP 02:16:58 3.

  • Page 93: Figure 18. Graphic Report Showing Knee Point Marker

    REV 1 EZCT-2000B USER’S MANUAL d. The following screen will be displayed: 1. IEEE 30 DEGREE 2. IEEE 45 DEGREE 3. IEC 10%V-->50%I Press either the key (IEEE 30 DEGREE), the key (IEEE 45 DEGREE), or the (IEC 10%V-->50%I) to select the desired knee point marker. The knee point marker will be set and you will be returned to the “START-UP”...

  • Page 94: Enabling And Disabling The Buried Ct In Transformer Delta Option

    EZCT-2000B USER’S MANUAL REV 1 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 19 and Figure 20 and also page 92 for further information), you must first select the “Buried CT...

  • Page 95: Disabling The Buried Ct In Transformer Delta Option

    REV 1 EZCT-2000B USER’S MANUAL e. The following screen will be displayed: RATIOS WILL BE ADJUSTED by 2/3. ARE YOU SURE? 1. YES 2. NO Press the key (YES). f. The following screen will be displayed: -buried ct in delta- ratios adjusted by two-thirds.
  • Page 96 EZCT-2000B USER’S MANUAL REV 1 b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3. RECORD DIRECTORY 4. SAVE/RES RECORD 5. ERASE RECORD 6. NEXT PAGE Press the key (NEXT PAGE). c. The following screen will be displayed: 1.

  • Page 97: Figure 19. Buried Ct In A Delta Transformer Illustration 1

    REV 1 EZCT-2000B USER’S MANUAL Figure 19. Buried CT in a Delta Transformer Illustration 1 Figure 20. Buried CT in a Delta Transformer Illustration 2...
  • Page 98 • The CT turns ratio is now measured as Ratio = or Ratio = ). This measured turns ratio is higher than the actual turns ratio. • The EZCT-2000B will display the correct CT turns ratio by adjusting the measured turns ratio by...

  • Page 99: Setting The Clock

    REV 1 EZCT-2000B USER’S MANUAL Setting the Clock To set the EZCT-2000B’s internal clock: a. Start from the “START-UP” menu: 1. RUN TEST 06/17/09 2. SETUP 10:14:25 3. TEST PLANS 4. DIAGNOSTICS 5. CURRENT SOURCE Press the key (SETUP). b. The following screen will be displayed: 1.
  • Page 100 REV 1 Printing Raw Memory Buffer Data You can print the raw data from the EZCT-2000B’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.

  • Page 101: Diagnostics, Verification, And Troubleshooting

    REV 1 EZCT-2000B USER’S MANUAL DIAGNOSTICS, VERIFICATION, AND TROUBLESHOOTING Performing a Diagnostics Test The Diagnostics test mode displays the output voltage at the selected X leads (V ), the voltage sensed by the H leads (V ), and the X voltage excitation current (I ).
  • Page 102 EZCT-2000B USER’S MANUAL REV 1 d. The following screen will be displayed: caution! cables will be energized! "ENTER" to continue [ENTER] Press the key to continue. e. The following screen will be displayed and the V , and I values will be continuously...

  • Page 103: Verifying The Ezct-2000B's

    Verifying the EZCT-2000B’s V Sense Circuit Using an External Meter The excitation voltage (V ) sensed by the EZCT-2000B can be verified using an external RMS volt meter. Follow the steps below to verify the EZCT-2000B’s V sense circuit: a. Connect the X cables to an RMS volt meter as shown in Figure 21.

  • Page 104: Verifying The Ezct-2000B's I

    You can verify the excitation current (I ) sensed by the EZCT-2000B by using an external RMS ampere meter. Follow the steps below to verify the EZCT-2000B’s I sense circuit: a. Connect the X cables to a power resistor and an RMS ampere meter as shown in Figure b.

  • Page 105: Quickly Verifying The Ezct-2000B's Turns Ratio Circuit

    EZCT-2000B USER’S MANUAL Quickly Verifying the EZCT-2000B’s Turns Ratio Circuit You can quickly verify the EZCT-2000B’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 23.

  • Page 106: Troubleshooting Guide

    The excitation current can be raised during a test. When running the • The EZCT-2000B X cable is driving an • Check the CT terminal connection. excitation test, the V opened circuit. voltage can be raised but the excitation current is always zero during a test.

  • Page 107: Upgrading Firmware

    Fill out all required fields (marked with red labels) and then click on the “Firmware” checkbox to the right of the “EZCT-2000B” label. Then fill out the serial number field on the right. Click on the “Submit” button once all form fields have been filled out.
  • Page 108 EZCT2B_M.hex. Copy this file to the root of a USB Flash drive. f. Make sure the EZCT-2000B’s power if OFF, and then insert the USB Flash drive containing the firmware file in the EZCT-2000B’s Flash drive interface port (“USB MEM”...
  • Page 109 REV 1 EZCT-2000B USER’S MANUAL When the firmware upgrade has finished, the following screen will be displayed: loading code from flash drv. BOOT LDR R x.xx You will hear a series of beeps as the unit re-boots. Once the unit has re-booted, the...
  • Page 110 1520 S. Hellman Ave • Ontario, CA 91761 • USA Phone: 909-923-9390 • Fax: 909-923-9391 www.vanguard-instruments.com Copyright © 2009 by Vanguard Instruments Company, Inc. EZCT-2000B User’s Manual • Revision 1.4 • February 16, 2010 • TA...

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