The topic for the Questions and Answers section in this edition of Electrical Tester is the testing of gas-insulated switchgear (GIS). This is a complex subject that our technical support department receives many questions about, so we asked Boel Ekberg, a...

In the December 2019 issue of Electrical Tester, we looked at the history of dielectric testing of transformers and why there are so many tests currently used to assess this important aspect of transformer health (Table 1, middle column). We also mentioned...

In recent years, there have been significant advances in the on-line testing of motors, motor diagnostics and motor monitoring. Voltage and current signature analyses have greatly improved the quality of predictive maintenance (PdM) programs compared with...