manualshive.com logo in svg

GDZX ZXHQ-A+ CT, Manual, Page: 3 / 23

Share
Download
GDZX ZXHQ-A+ CT Manual Download Page 3

- 2 -

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

Summary of Contents for ZXHQ-A+ CT

Page 1: ...ZXHQ A CT PT Characteristics Tester ...

Page 2: ...ontroller 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 ...

Page 3: ...rent 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 Excitatio...

Page 4: ...on 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 ...

Page 5: ...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 ...

Page 6: ...ction 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 ...

Page 7: ...re 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 volta...

Page 8: ... 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 Ret...

Page 9: ...alculate 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 th...

Page 10: ...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 D...

Page 11: ...about 2MIN the holding time is about 3S for the setting current greater than 500A During the test process the controller will be displayed on the Test item and flashes constantly unless automatically escaped when the test is completed or the test is interrupted manually 6 Ratio Ratio and Polarity Test 1 CT Transformation Ratio and Polarity Test connection mode shown in Figure 4 Move the controller...

Page 12: ...n controller After the completion of the test select Print Save or Print Figure 24 Figure 25 2 PT Transformation Ratio and Polarity Test connection mode shown in Figure 6 Parameter Setting as shown in Figure 25 U p Setting range of output voltage 0 2500V U s 100V 100 3V 100 3V 150V 220V After checking the correct wiring Turn on the output Move the controller to start item of the transformation rat...

Page 13: ...ht load of two kinds of state values light load to full 25 After checking the correct wiring Turn on the output Move the controller to Test item to start the test With increasing of AC output to the primary side of CT the current values measured on the circuits on the primary and secondary sides will be displayed on the screen in real time After the test the error test result will be worked out au...

Page 14: ...ure 29 During the test process the controller will be displayed on the Test item and flashes 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 If the display is 9 then the error exceeds the display range please check the setting valu...

Page 15: ...Resistance Test 1 CT Resistance Test Parameter Setting as shown in Figure 32 Move the controller to CT or PT Select Resistance to enter CT resistance test interface Figure 23 The test should be preceded by a test line to zero Zero One side connect to D1 and D2 Another side should to be shorted The connection mode is as shown in Figure 8 and select the zero after the end of the zero the interface z...

Page 16: ... shown in Figure 10 CT short circuit the secondary side S1 and S2 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 If the flashover phenomenon occurs in the test then CT secondary insulation against ground is deemed to be un...

Page 17: ...the test results Excitation Load Ratio Error Resistance Each piece of record will be displayed through Number and Save Date 8 pieces of data are displayed on each page use controller to page up and down If the user wants to inquire certain group of file he can move controller to the files of this group and then click it The LCD screen will display the result 2 Dump Data Under the Figure 35 interfa...

Page 18: ...st option and then click Open to open transformation ratio and polarity data in USB disk If you open transformation ratio and polarity data in the interface of voltage current characteristic test it can not be display correctly 3 Click Print in the interface of voltage current characteristic to print voltage current characteristic curve and data Click Print in the interface of deviation curve to p...

Page 19: ...sed or persons or equipment may be damaged Touching the connection terminals in the test is strictly forbidden The tested CT must be in offline state or the normal application may be affected or the test result may be incorrect The tester shall be operated by professional technicians Individually opening the equipment may lead to permanent damage Ⅶ Packing List No Model Name Quantity 1 Host 1 ...

Page 20: ...able 1 3 Test Clamp 2 4 High Current Test Line 2 5 Test Line Including Crocodile Clip 2 6 Ground Wire Including Crocodile Clips 1 7 Fuse 5 8 Printer Paper 2 9 Manual 1 10 Test Report 1 11 Certificate Warranty Card 1 ...

Page 21: ...riod of time After the completion of the test click controllers end of the test The connection mode of Current Calibration is as shown in Figure39 Voltage setting value is slightly higher than the Current setting value A Load Ω After the completion of the setting turn on the output and select Test item When the output voltage or current of the equipment reaches the setting value it will be held fo...

Page 22: ...ad of the protection type current transformer shall meet the requirement of 5 error curve Once the actual secondary load of the current transformer is less than the load permissible by the 5 error curve the measurement error of the qualified current transformer is within 5 based on the rating current multiple If the secondary load is great the core of the current transformer is easy to get saturat...

Page 23: ...rent 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 Figure 40 Error curve calculation formula M I P N ZII U I Z2 K I I Current U Voltage N 1 1A Rating Current I Current N 5 5A Current Z2 CT Secondary Side Impedance P 20 5 Error Curve K 19 ...

Reviews:

No comments