The insulation resistance tester under UHV power can help many power workers conduct various power tests more conveniently.

As a means of checking whether electrical equipment can operate normally, high-voltage testing is widely used. What are the high-voltage testing projects? What are the corresponding high-voltage testing equipment?

1. Insulation testing of coil equipment

The tests include: insulation resistance, absorption ratio (polarization index) test, leakage current test, dielectric loss tangent Tan δ test, external power frequency withstand voltage test, induction withstand voltage test, and partial discharge test.

The high-voltage testing equipment used includes: digital display meter, fully automatic dielectric loss tester, complete set of power frequency withstand voltage testing device, induction withstand voltage testing device, partial discharge detector, etc.

2. Characteristic testing of coil equipment

The testing includes: ratio, polarity and wiring group testing, DC resistance testing, no-load and short-circuit characteristic testing, zero sequence impedance testing, tap changer testing, winding deformation testing, and excitation characteristic testing.

The high-voltage testing equipment used includes: fully automatic transformer ratio tester, transformer no-load load characteristic tester, transformer DC resistance tester, transformer winding deformation tester, etc.

3. Switchgear testing

The tests include: insulation resistance test, leakage current test, dielectric loss tangent Tan δ test, circuit breaker, GIS circuit resistance test, circuit breaker, GIS withstand voltage test, GIS partial discharge test.

The high-voltage testing equipment used includes: insulation resistance tester, fully automatic dielectric loss tester, circuit breaker mechanical performance tester, circuit resistance tester, partial discharge tester, etc.

4. Testing of insulators and bushings

The tests include: insulation resistance test, dielectric loss tangent value Tan δ and capacitance test, AC withstand voltage test, and partial discharge test.

The high-voltage testing equipment used includes: insulation resistance tester, fully automatic dielectric loss tester, portable withstand voltage tester, partial discharge detector, etc.

5. Overhead line cable testing

The testing content includes insulation resistance testing, phase inspection, cable AC (DC) withstand voltage and DC leakage testing, overhead line and cable line power frequency parameter testing, and capacitance current testing.

The high-voltage testing equipment used includes: insulation resistance tester, insulation resistance tester, DC high-voltage generator, power frequency line parameter tester, power frequency line parameter tester, etc.

6. Capacitance test

The tests include: insulation resistance test, capacitance test, dielectric loss tangent Tan δ test, and AC withstand voltage test.

The high-voltage testing equipment used includes: insulation resistance tester, fully automatic dielectric loss tester, portable withstand voltage tester, etc.

7. Lightning arrester testing

Tests include: insulation resistance test, conductive current test, power frequency discharge voltage test, discharge counter test, leakage current test under DC 1mA voltage (U1mA) and 0.75u1mA, AC leakage current test under working voltage, power frequency parameter current test under power frequency reference voltage, etc

The high-voltage testing equipment used includes: insulation resistance tester, lightning arrester discharge counter calibrator, power frequency line parameter tester, etc.

8. Grounding device testing

The tests include: grounding resistance test, grounding down conductor and grounding grid conductivity test, soil resistivity test, contact voltage, step voltage and potential distribution test.

The high-voltage testing equipment used includes: grounding lead wire tester, digital grounding resistance tester, insulator distribution voltage detector, etc.

9. Testing of commonly used electrical insulation tools and instruments

Testing includes insulation tool testing, protective tool testing, and device and equipment testing.

The high-voltage testing equipment used includes a digital grounding resistance tester.