Leakage Current and Monitoring of GIS Lightning Arresters

In an earlier blog, we discussed the techniques and methodologies for health assessment of lightning/surge arresters.  We also shared our knowledge on the various methods of measuring resistive leakage current or power loss. In the following blog, we answered the 10 most frequently asked questions on the various aspects of testing and measuring lightning/surge arresters. …

Partial Discharge Testing: Need, Testing Methodologies and Addressing Defects

Studies show that over 85% of disruptive failures in high voltage (HV) and medium voltage (MV) equipment are Partial Discharge related. Partial Discharge (PD) activity provides evidence  of deterioration in assets, which can propagate and increase, until the insulation is no longer able to withstand the electrical stress therefore leading to flash-over and finally equipment failure. Therefore, early detection …

9 Fundamental Tests For High Voltage Circuit Breakers

When it comes to the cohesive protection of man, machine and infrastructure from electrical mishaps, Circuit Breakers (CBs) play a linchpin role, especially in the high-voltage (HV) environment of Substations. With rapid advancements in technology, while the quality of HV CBs has definitely improved over the last few years leading to a significant drop in …