1. Overview of international standards

High voltage tester supplier demiks believes that high voltage cable testing follows strict international protocols to ensure safety and reliability. Key standards include:

2. Factory Acceptance Tests (FAT)

Conducted by manufacturers before delivery:

1. Partial Discharge Test (IEC 60885-3)

• Voltage: 1.5-2U₀

• Acceptance: <10 pC for new cables

2. AC Voltage Test (IEC 60502)

• 2.5U₀ for 4 hours (routine test)

• 3U₀ for 4 hours (type test)

3. Impulse Voltage Test (IEC 60060-1)

• Lightning impulse: ±95kV for 22kV cables

• Switching impulse for EHV cables

3. Field Installation Tests

Performed after installation/before commissioning:

4. Diagnostic/Maintenance Tests

For in-service cable condition assessment:

1. Tan Delta Mapping (IEC 60840)

• Voltage sweep from 0.5U₀ to 2U₀

• Warning threshold: >0.5% at U₀

2. Partial Discharge Mapping (IEC 62478)

• Ultra-wideband detection

• Critical levels: >50 pC (investigate)

3. Time Domain Reflectometry (IEEE 1222)

• Fault location accuracy: ±0.5% of length

5. Special Tests for EHV Cables (>150kV)

1. Load Cycle Test (IEC 62067)

• 180 heating/cooling cycles

• Includes thermal stability evaluation

2. Bending Test

• Minimum bending radius verification

• 20 cycles at rated tension

3. Water Penetration Test

• 1m water head for 24 hours

• No measurable water ingress

6. Regional Variations

• North America (IEEE Standards)

• More emphasis on DC testing

• Higher VLF test voltages (2-3U₀)

• Europe (IEC Standards)

• Preference for AC testing

• Stricter PD requirements

• Middle East (GCC Specifications)

• Mandatory 72-hour soak test

• Enhanced UV resistance checks

7. Safety Standards

• IEC 61936: Safety distances

• IEEE 1584: Arc flash calculations

• OSHA 1910.269: Live work procedures

8. Emerging Standards

• IEC 62895: HVDC cable tests

• CIGRE TB 728: Damped AC testing

• IEEE P2096: Smart cable monitoring

Best Practice Tip: Always combine multiple test methods (e.g., VLF + tan delta + PD) for comprehensive assessment, especially for aged cables.

The above content is published by demiks, please specify, demiks is a substation equipment manufacturer, specializing in the production of high-voltage tester, transformer tester, circuit breaker test equipment, relay tester, SF6 gas analyser, cable fault tester and other products, if you have power test testing needs, please feel free to contact demiks power science and technology limited company or send an email! Give us: contact@demikspower.com