Cable Testing for HV, MV and LV
1). LV Cables – Common Tests
Visual inspection and installation verification.
Continuity test.
Insulation Resistance (IR) test.
Conductor resistance test.
Polarity verification.
Phase identification.
2). MV Cables – Common Tests
Cable and installation visual inspection.
Continuity test.
Insulation Resistance (IR) test.
Conductor resistance test.
Sheath integrity test.
Phasing / phase identification.
VLF withstand test, where specified.
Tan Delta / diagnostic testing, where required.
3). HV Cables – Common Tests
Cable and installation inspection.
Continuity and conductor resistance testing.
Insulation Resistance (IR) test, where applicable.
Sheath integrity / sheath voltage test.
AC withstand or other specified withstand testing.
Tan Delta / diagnostic testing, where required.
Why Cable Testing is Important?
Cable testing is not simply a checklist activity. It helps to:
Detect insulation or installation defects before energization.
Verify cable integrity and installation quality.
Reduce the risk of failures and unplanned outages.
Minimize rework and commissioning delays.
Provide documented evidence for inspection and commissioning.