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GDZX ZXHQ-A+ CT Manual

Characteristics tester
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ZXHQ-A+ CT/PT
Characteristics Tester

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Summary of Contents for GDZX ZXHQ-A+ CT

  • Page 1 ZXHQ-A+ CT/PT Characteristics Tester...

  • Page 2: Table Of Contents

    Contents Ⅰ. Introduction......................- 2 - Ⅱ. Test Function..................... - 2 - Ⅲ. Technical Parameter..................- 2 - Ⅳ. Panel Introduction..................... - 3 - Ⅴ. Operation Method..................... - 6 - 1. Controller......................- 6 - 2. Main Menu......................- 6 - 3.

  • Page 3: Ⅰ. Introduction

    Ⅰ. Introduction ZXHQ-A+ CT/PT Characteristics Tester is mainly used for field testing of P class CT and PT. The test items mainly include excitation characteristic,transformation ratio, polarity, Degauss,5% and 10% error curves,secondary circuit check,withstand test of power frequency alternating current and secondary load.Adopt LCD,self-equipped minitype printer supporting field printing;supporting to use USB flash disk to dump data,with simple and...

  • Page 4: Ⅳ. Panel Introduction

    Single Machine Output Current of 0～1000A Transformation Ratio Test CT ratio measurement range 5～25000A/5A（5000A/1A） PT ratio measurement range 1～500KV Load Range 5～1000VA Resistance measurement range 0.1～300Ω Error ≤0.5% （0.2%*Reading+0.3%*Range） Operating Temperature －10℃～+40℃ Relative Humidity ＜90RH% Altitude ≤1000m Overall Dimension(Length×Width×Height) 400 *200 * 260（mm） Weight ≤23 Kg Ⅳ.
  • Page 5 4 —— USB 5 —— Controller 6 —— Current Output Terminal 7 —— Current Input Terminal(Connected to Secondary Side for CT Transformation Ratio Test) 8 —— Excitation Characteristic Power Output/The Port of Actual Secondary Load Test 9 —— Connected to Primary Side for PT Transformation Ratio Test 10 ——...
  • Page 6 Figure 4 (CT Current Figure 5(CT Connection Diagram Output Connection Diagram) for Transformation Ratio, Polarity) Figure 6(PT Connection Diagram Figure 7(CT/PT Actual Transformation Ratio, Polarity) Secondary Load Connection Diagram) Figure 8 (CT/PT Test line Figure 9(CT/PT Resistance zero Connection Diagram) Connection Diagram) Figure 10(CT Connection Diagram Figure 11(PT Connection Diagram...

  • Page 7: Ⅴ. Operation Method

    Ⅴ. Operation Method 1. Controller The controller has three states: “Left Rotation”, “Right Rotation” and “Pressing down”. It is used to move the controller, input data and select the test item. Figure 12 (CT Main Menu) Figure 13 (PT Main Menu) 2.
  • Page 8 Figure 14 Figure 15 Excitation Characteristic Function Items (as shown in Figure 15) All operating function items on the interface are as following: Print: select “Print” item to print the excitation curve graphics and data.  Data: Select “Data” item and the screen will display the list of excitation characteristic ...
  • Page 9 Figure 16 Figure 17 Figure 18 Figure 19 Setting of error curve VA：CT secondary side impedance value. I-sn：CT secondary side rating current (1A or 5A). Kalf：As for protection type CT (5P10 20VA)，“10”is Kalf 5%：Calculate the 5% error curve data and display the error curve. 10%：Calculate the 10% error curve data and display the error curve.

  • Page 10: Degauss Test

    Warning: the zero terminal of primary winding of the voltage transformer shall be grounded before the test, or high voltage will be output. Please refer to the CT excitation characteristic test for the explanation of the operation method and test result. Figure 20 Figure 21 4.

  • Page 11: Ac Current:current Output

    Figure 22 Figure 23 5. AC Current:Current Output (connection mode shown in Figure 5) Set Currrent: 0～1000A, Selection of output current (Figure 23): maximum output current from P1 and P2 terminals of the tester. With the changing of the operating voltage, the actual output current will change with a deviation of 15%, which won’t affect the application.
  • Page 12 measured on the circuits on the primary and secondary sides will be displayed on the screen in real time. After the test, the transformation ratio and the polarity state will be worked out automatically. Polarity Discrimination Method: the homochromatic terminal of the tester is in-phase terminal, namely P1 connected to P1 of CT, and S1 connected to S1 of CT.

  • Page 13: Error Test

    constantly unless escaped from the au tomatic test interface when the test is completed or the test is interrupted manually through pressing down controller. After the completion of the test, select “Print”、“Save”or “Print”. 7. Error Test 1) CT Error Test (connection mode shown in Figure 4) Move the controller to“CT”, Select Error to enter CT Error test interface (Figure 26).

  • Page 14: Load Test

    Figure 28 Figure 29 2) PT Error Test (connection mode shown in Figure 6) Parameter Setting: as shown in Figure 28, U-pn: 0～2500V. U-sn: 100V、100/√3V、100/3V、150V、220V. Rated Load: The capacity of analyzer. Actual Load: According to the rated load setting, automatic calculation of load and light load of two kinds of state values (light load to full 25%).

  • Page 15: Resistance Test

    situation, select “Print”、“Save”or “Print”. 2) PT Load Test (See Figure 7 for connection mode) Parameter Setting: as shown in Figure 31, Line-Res：Set the resistance value of the test line. U-sn：100V、100/√3V、100/3V、150V、220V. Move the controller to“PT”, Select Load to enter CT load test interface.Select Test key to start the test and the test result will be displayed automatically.

  • Page 16: Ac Hipot (Voltage Withstand Test Of Alternating Current)

    Figure 32 10. AC Hipot (Voltage Withstand Test of Alternating Current) Move the controller to“CT”or“PT”, Select AC Hipot to enter AC Hipot test interface (Figure 33), The users can set the AC output voltage to be 0 ～ 2500V according to their requirements.

  • Page 17: Index (Query)

    The connection mode is as shown in Figure11(PT), short circuit the secondary side ‘a’ and‘x’ and connect them to the tester voltage output terminal K2, while the other voltage output terminal of the tester K1 is connected to the transformer shell. Move the controller to Test to increase the voltage and main it for 60S.

  • Page 18: Pc Software

    Figure 34 Figure 35 12. PC Software 1) Operating ambient, WINDOWS XP and backward compatibility WINDOWS operating system. 2) 2Function description: open host computer software Integrated Test Equipment of Mutualinductor. Choose the category of mutualinductor“CT”or“PT”. Choose corresponding test functions. If you want to open transformation ratio and polarity data, choose Transformation Ratio and Polarity Test option, and then click Open to open transformation ratio and polarity data in USB disk.

  • Page 19: Ⅵ. Precautions

    Figure 36 Ⅵ. Precautions  In order to ensure the safety of persons and equipment, please carefully read the operation manual before using the tester.  The tester shall be reliably grounded when used, or persons or equipment may be damaged.
  • Page 20 Power Cable Test Clamp High Current Test Line Test Line (Including Crocodile Clip) Ground Wire (Including Crocodile Clips) Fuse Printer Paper Manual Test Report Certificate / Warranty Card - 19 -...

  • Page 21: Appendix

    Appendix 1. The method of"Calibration" test (for example to CT) Figure 37 Figure 38 Figure 39 Move the controller to“CT”or“PT”, Select Verify to enter Verify test interface (Figure 37), Set Voltage: 0.1A ～ 5A Set Current: 1V～2500V The connection mode of Voltage Calibration is as shown in Figure 38. After the completion of the setting, turn on the output, and select “Test”...
  • Page 22 printer showing the smooth surface, take out a small amount of paper and press down the panel. If the printing condition is normal, but there are no words or curve on the paper, the paper is installed inversely. 3. Warranty period: 1 year. Error Curve Explanation According to the data of 5% and 10% error curves between the current multiple（M）and permissible secondary load （ZII）...
  • Page 23 If 10% error doesn’t conform to the requirements, the general measures taken are: Increasing the section area of the secondary cable area (decreasing the secondary impedance) Connecting the current transformers of the same type and transformation ratio in series (reducing the excitation current of the transformer) Using the winding with high excitation characteristic (increasing the excitation impedance) Increasing the transformation ratio of the current transformer (increasing the excitation impedance)

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