Features of the Testing Device



1. It has large output capacity and high output voltage, and can arbitrarily combine reactors for AC withstand voltage tests on different test objects.

2. It is small in size and light in weight, especially convenient for field tests.

3. It has good protection functions, including overvoltage protection, overcurrent protection, time protection, flashover protection, overheat protection, module protection, etc.

4. It is extremely simple to operate and has both manual and automatic modes.

5. It uses a large screen, making test data clear at a glance, and can print test results.

6. After the test object breaks down, there is no risk of overvoltage, and the damage to the test object is quite small.

7. The power supply capacity required for the test is small, only a fraction of that required for power frequency transformer tests, solving the problem of difficulty in finding a power source on site.



Scope of Application of the Equipment



Standards referenced and implemented in the manufacturing of the equipment



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

GB 6450—1986        "Dry-type Power Transformers"

DL/T848.2—2004      "Test Transformers" 

GB/10229—1988       "Reactors" 

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 Configuration of the Equipment



1 Test requirements:

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

2 Design of reactors:

  2.1. AC withstand voltage test for 300mm2/10kV cable, length 3 km. Test time 5 minutes, test voltage 22kV, test frequency 30-300Hz, equivalent capacitance 1.254uF. When the 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 Configuration of reactors: