Device Features



1. Large output capacity, high output voltage, and the ability to freely combine reactors for AC withstand voltage tests on different test objects.

2. Compact size and lightweight, especially convenient for field tests.

3. Excellent protection functions, including overvoltage protection, overcurrent protection, time protection, flashover protection, overheating protection, and module protection.

4. Extremely simple operation, with both manual and automatic modes.

5. Large screen for clear test data display, and test results can be printed.

6. No overvoltage risk after test object breakdown, minimizing damage to the test object.

7. Requires small power supply capacity, only a fraction of that needed for power frequency transformer tests, solving the problem of difficult on-site power supply.



Equipment Application Scope



Standards referenced and implemented in equipment manufacturing



DL/T849.6—2004      "High Voltage Resonant Test Device"

GB 6450—1986        "Dry-type Power Transformer"

DL/T848.2—2004      "Test Transformer" 

GB/10229—1988       "Reactor" 

GB/T11920—1989      "General Technical Conditions for Control Devices"

GB/T16927.1—1997    "High Voltage Test Techniques"

IEC358—1990         "Coupling Capacitors and Capacitor Dividers"

GB311.1              "Insulation Coordination for High Voltage Transmission and Transformation Equipment"

DL/T846—2004        "General Technical Conditions for High Voltage Test Equipment"

Q/CSG10007—2004     "Regulations for Preventive Tests of Power Equipment"

GB7328—87           "Measurement of Sound Level of Transformers and Reactors"

DL474.4—1992       "AC Withstand Voltage Test"



Specific Equipment Configuration



1 Test requirements:

  1.1. AC withstand voltage test for 300mm2/10kV cable, length 3 km. Test time 5 min, test voltage 22kV, test frequency 30~300Hz, equivalent capacitance 0.418uF/km.

2 Reactor design:

  2.1. AC withstand voltage test for 300mm2/10kV cable, length 3 km. Test time 5 min, test voltage 22kV, test frequency 30~300Hz, equivalent capacitance 1.254uF. When frequency is 35Hz.

Test current I=ωCXU test=2×3.14×35×1.254×22×10-3=6A

Corresponding reactor inductance L=1/ω2C =16.5H

3 Reactor configuration: