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Power System

Electrical Busbar Systems

November 25, 2019November 12, 2019

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 …

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Maintenance of Lightning Arrestors (Lighting Arresters)

August 23, 2019July 16, 2019

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 …

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Maintenance of Current Transformer

September 12, 2019July 15, 2019

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 …

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Maintenance of Potential Transformer (PT and CVT)

September 11, 2019July 14, 2019

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 …

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Maintenance of Electrical Isolators and Earth Switches

August 14, 2019July 14, 2019

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 …

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Maintenance of SF6 Circuit Breaker

August 14, 2019July 14, 2019

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 …

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Maintenance of Minimum Oil Circuit Breaker

August 14, 2019July 14, 2019

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 moreMaintenance of Minimum Oil Circuit Breaker

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