There are numbers of incoming and outgoing feeders and transformers connected together in an electrical substation. But practically it is not possible to connect all the feeders and transformers together at a particular point or … Read more
The lightning arrestors are those types of equipment which operate during high voltage lighting and switching pulses. It bypasses the surge current to the ground during overvoltage surge. It becomes a low impedance path for … Read more
The current transformer (CT) is the essential equipment of a substation. Not only for metering purposes, but CT also takes a vital role in protections. Any malfunction of a current transformer can generate huge damage … Read more
The maintenance of a potential transformer is somewhat similar to the maintenance of a current transformer. The potential transformer performs a vital role in voltage measurement and distance protection scheme of the system. There is … Read more
Since an electrical isolator is a mechanical switch, it often suffers from mechanical problems. To avoid such problems and to ensure reliable operations, proper maintenance of electrical isolators and earth switches is essential. Isolators in … Read more
This breaker uses SF6 or sulfur hexafluoride as arc quenching or arc extinguisher medium. Although SF6 has very good dielectric property. But like minimum oil circuit breaker, the SF6 CB only utilizes the extinguishing property … Read more
Needs for Maintenance of Minimum Oil Circuit Breaker (MOCB) The bulk oil circuit breaker (BOCB) had become obsolete many years ago. Nowadays, the minimum oil circuit breaker (OCB) has also become almost obsolete. But there … Read more