Insulation tests carried out as part of the commissioning procedure for cables have a simple goal: to maximise the reliability of the newly installed cable circuits by detecting defects before the circuits go into service.

Insulation testing, in all its many guises, is something that is almost taken for granted today, at least in everyday applications. But it wasn’t always so.

The dynamic resistance measurement (DRM) technique for circuit breaker diagnostics was invented by Megger and is used extensively on high voltage circuit breakers to determine the condition and deterioration of arcing contacts inside the breaker.

In response to the growing importance of rapid and accurate location for line faults in modern transmission and distribution networks, CIGRE Study Committee B5 has set up a new working group (WG B5.52) to analyse and compare fault location technologies for...