High Voltage Cable Testing

LIVE HV can provide Online PD testing services for cables rated from 3.3 kV to 750 kV and use cable mapping to pinpoint any discharge detected to within 0.5% of the cable’s length. High Frequency Current Transformers (HFCT’s) are used to detect discharge from the entire cable length including any joints or terminations.

Key Benefits

• Provide accurate condition assessment of cables
• Check cable joint & termination integrity to prevent failures
• No requirement for outage during testing
• Cable mapping for PD location while cable is energised
• Advanced noise filtering for electrically ‘noisy’ conditions
• Periodic and Continuous monitoring options available

LIVE HV provides off-line commissioning, testing, maintenance and fault location for cables up to 220 kV including Partial Discharge (PD) and Tan Delta (TD) measurements.

When VLF cable testing is combined with diagnostic Partial Discharge (PD) and Tan Delta (TD) measurements we gain a far greater insight into the cable condition and can detect cable failure modes. PD testing is the best tool for detecting localised faults such as poorly terminated joints or terminations. TD testing which measures if there is any resistive component to the insulation provides us with overall health or condition of the cable insulation. Combined, PD and TD testing provides the ultimate in cable condition assessment.

LIVE HV’s specialised cable fault location techniques have been developed to accurately locate faults without placing undue stress on the cable. Rather than using a destructive ‘thumper,’ LIVE HV employ a combination of HV Bridge, Arc Reflection, Time Domain Reflectometry and Electromagnetic Wave Detection to pinpoint sheath to earth and core to screen faults for LV and HV cables.

Cable faults are an unexpected inconvenience. We understand your urgency and make it our priority to be on site quickly, pinpointing the cable fault and enabling you to resume operation with minimal business interruption.