Test Requirements for Lightning Protection Insulation Resistance Tester



Lightning protection insulation resistance tester is used in lightning protection device testing to test the performance of zinc oxide arrester insulation materials. Insulation materials mainly use their insulating properties to isolate live or different potential conductors, allowing current to flow in a certain direction. Regardless of the material used, the insulation resistance should at least meet the requirements specified by the standard, which is also the reason why this insulation resistance must be tested. Insulation resistance testing is mainly used when adopting S-type linked network, except at the Earthing Reference Point (EPR), to determine whether the specified insulation requirements and SPD insulation resistance test requirements are met. In addition to using a megohmmeter, a 1.2/50 us waveform impulse current generator can also be used for impulse testing to test the insulation of S-type network except at the ERP.



 



Lightning protection insulation resistance tester technical features:

1. The maximum error should not exceed ±30%

2. DC test voltage should be used.

3. When connected in series with a 5μF capacitor with the resistance under test (Ri=Un•1000Ω/V), the test result should differ from that without the capacitor and be greater than 10%.

4. The test voltage should not exceed 1.5•Un

5. The test current flowing through the resistance under test Un•1000Ω/V should be at least 1mA.

6. The test current should not exceed 15mAp, and the AC component should not exceed 1.5mA

7. External AC or DC voltage connected to the test equipment for 10 seconds should not damage the equipment.