Point-on-Wave (PoW) Switching
Definition Point-on-Wave (PoW) switching is a technique used in power systems to control the precise timing of circuit breaker operations in relation to the waveform of the alternating current (AC) …
IEC Current Transformer Accuracy Class
Current transformer (CT) accuracy class refers to how precisely a current transformer can replicate the primary current in its secondary winding, within certain tolerances, under defined conditions. CT accuracy is …
Hazardous Area Classification Impact on Earthing Systems in Oil & Gas Installations
Hazardous Area Classification Oil & gas installation has areas which are classified as being Zone 1 or Zone 2 according to IEC 60079. With regards to explosion ignition of flammable …
Earthing System in Oil & Gas Installations
In oil and gas installations, earthing systems play a crucial role in ensuring safety and mitigating risks associated with electrical faults and preventing hazardous incidents such as fires, explosions, and …
Electric Motors Derating factors
Like any other power system equipment, motors need to be derated to suit a high ambient temperature. Equipment that are usually manufactured in America, UK and Europe are based on …
Power System Overvoltages and Insulation Coordination – Part 2
This is Part 2 of this series, the first part could be found here. Insulation coordination is the “selection of the dielectric strength of equipment in relation to the voltages …