GDZX ZXHQ-A+ CT User manual

ZXHQ-A+ CT/PT
Characteristics Tester

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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. Excitation...........................................................................................................- 6 -
4. Degauss Test................................................................................................... - 9 -
5. AC Current:Current Output.......................................................................... - 10 -
6. Ratio：Ratio and Polarity Test....................................................................- 10 -
7. Error Test........................................................................................................ - 12 -
8. Load Test........................................................................................................ - 13 -
9. Resistance Test............................................................................................. - 14 -
10. AC Hipot (Voltage Withstand Test of Alternating Current).................. - 15 -
11. Index (Query)............................................................................................... - 16 -
12. PC Software................................................................................................. - 17 -
Ⅵ. Precautions...................................................................................................... - 18 -
Ⅶ. Packing List......................................................................................................- 18 -
Appendix.................................................................................................................- 20 -

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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
convenient operation.
Ⅱ. Test Function
Current Transformer (CT）
Voltage Transformer (PT）
●Magnetization Curve
●Excitation Characteristic Test
●Transformation Ratio Test
●Transformation Ratio Test
●Polarity
●Polarity
●5% and 10% error curve
●Withstand Test of Power Frequency
●Current Injecting
●Degauss
●Degauss
●Calculation of Knee Point Value
●Withstand Test of Power Frequency
Alternating Current
●Actual Secondary Load Test
●Automatic Calculation of Excitation
Knee Point Value
●Resistance Test
●Actual Secondary Load Test
●Resistance Test
Ⅲ. Technical Parameter
Operational Power Supply
AC220V±20V, 50～60Hz
Equipment Power Supply Output Waveform
Sine Wave
Single Machine Output Voltage of Excitation
Characteristic
0～2500V
Excitation Output Current
0～20A

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Ⅳ. Panel Introduction
Figure 1
Note of Panel:
1—— Grounding
2—— Printer
3—— Monitor
Single Machine Output Current of
Transformation Ratio Test
0～1000A
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

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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 —— Connected to Secondary Side for PT Transformation Ratio Test
11 —— The Port of Resistance Test
12 —— Output (turned left for on and right for off.)
13 —— Power Switch
14 —— Power Socket
15、16、17、18、19、20 —— The wiring diagram of the test project
Figure 2 Figure 3
(CT Excitation Connection Diagram) (PT Excitation Connection Diagram)

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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
for Withstand Test of Alternating for Withstand Test of Alternating Current)

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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. Main Menu
The main menu has seven items of “Excitation”、 “Load”、 “Ratio”、 “Error”、 “AC Hipot”、
“AC Current”、“Query”、“Degauss” and “Back”, which can be selected and set with
Controller.
Note: before test please set the number settings which will be saved as index information
to facilitate the user to inquire.
NO.: (0000～9999)
3. Excitation
Move the controller to Excitation For example to enter CT Test interface(Figure 14).
1) CT Excitation Characteristic Test: the connection mode is as shown in Figure 2.
Current:the setting range for output current is 0～20A (It is usually set to be 1A)
Voltage: The setting range for output voltage is 0～2500V
The function of calibration: mainly used to view the tester output voltage and current values
for the test project, Not to be used to test, The specific content to see Appendix I.
1Test
After ensuring the correct wiring, turn on the output, press the “Test” key to start the test,
After the completion of the test, the tester will automatically draw the figure of
magnetization curve(Figure 15).

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Figure 14 Figure 15
2Excitation 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
voltages and currents (shown in Figure 16). Page up and down through turning the
controller.
Save:select “Save” item to save the current test results in the memory of the equipment
and display “Saved”.
ErrCurve: as shown in the interface of Figure 15, select “ErrCurve” item and the screen
will display the setting menu for corresponding error curve(see Figure 17).
After the completion of the settings, the tester will automatically work out the error curve (as
shown in Figure 18). The specific content to see Appendix .
Return: return to the previous interface.
PrintSet:select “PrintSet” item and the screen will display the menu for the Data Set,you
can select “Custom” to setting the current value to be printed ,or select“Default” (see
Figure 19).

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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.
Error Curve Function Items
Print：print the error curve graphics and data.
Data：inquire error curve graphics and data.
Back：return to the previous menu.
2) PT Excitation Characteristic Test (with connection mode shown in Figure 3)
Move the controller to Excitation , to enter PT Test interface(Figure 20)
U-sn : 100V、100/√3V、100/3V、150V、220V.
Current : the setting range for output current is 0～20A (It is usually set to be 1A)

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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. Degauss Test
1) CT Degauss Test (The connection mode is as shown in Figure 2.)
Parameter Setting: as shown in Figure 21,
I-sn：1A or 5A.
Move the controller to“CT”, Select Degauss to enter CT Degauss test interface (Figure
22).Select Test key to start the test. When the test is completed, the interface displays
"success"，According to the actual situation, select “Test” or “Back”.
2) PT Degauss Test (See Figure 3 for connection mode)
Parameter Setting: as shown in Figure 22,
U-sn：100V、100/√3V、100/3V、150V、220V.
Move the controller to“PT”, Select Degauss to enter PT Degauss test interface (Figure
22).Select Test key to start the test. When the test is completed, the interface displays
"success"，According to the actual situation, select “Test” or “Back”.