Q. What is the need of doing insulation resistance test for cables?
A. In order to verify the electrical isolation between core to earth,core to core.
resistance ∝ 1 / temperature.
PROCEDURE:
1. Remove all external connections before conducting test.
A. In order to verify the electrical isolation between core to earth,core to core.
- while doing the test, specify the temperature
resistance ∝ 1 / temperature.
PROCEDURE:
1. Remove all external connections before conducting test.
2. Connect the cable gland and remaining cores (which are not going under test) to earth.
3. Confirm that no person in contact with cable are at other end.
4. Apply megger voltage to core which is being under test.
5. Discharge the charge after test.
6. Repeat the same procedure for remaining cores (in case of multi core cables).
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