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Commissioning of MV & HV cables

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Commissioning of cable systems in accordance with IEC, IEEE or Cenelec.. Advanced cable diagnosis with Damped AC reveals and locates weaknesses in terminations, joints and cable, as well as the general insulation aging. The system is tested with an overvoltage so that weaknesses that are triggered by earth faults are also revealed. Cable systems from 6.3 to 250 kV with a length of up to 30 km can be tested. 

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Partial discharges (PD) measurements during SOAK test

Partial discharge is considered as the largest contributor to insulation degradation.

PD measurements can be performed on most types of systems from 6 to 420 kV without the need for downtime. The equipment can also be temporarily mounted for monitoring over time. Periodic PD measurements help to avoid accidents

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Smaller capacitive loads can be tested with 50 Hz equipment. e.g. short cables with a capacitance up to 5.3 nF can be tested with 60 kV. Lower test voltage gives higher test capacitance.

 

The test can be combined with PD measurements. We have equipment to test up to 120 kV.

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VLF Tan Delta verifies that the cable system can withstand overvoltage, which detects water / moisture in the cable / joints.

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Cable diagnosis with
Line Resonance Analysis (LIRA)

The diagnosis detects and locates changes in the electrical parameters in the cable. Used on all types of cables up to 250 km 

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HiPOT insulation test 0,1 Hz

The cable system is exposed to an overvoltage with the intention of provoking a controlled breakthrough in weaknesses in the cable, joints and terminations.

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