Auto Recloser Relay – Function, Block & Lockout mode

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Auto recloser function is used for transmission line protection system to avoid tripping during transient fault of the line. The function is available in the distance protection relay however separate auto recloser relay is also available for using the function. Auto Recloser Relay Function: We know that the distance protection relay is used to protect … Read more

What is STUB Protection? application and working principle

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Stub protection uses a simple overcurrent protection system to protect the transmission line when the line isolator remains open. Stub protection works mainly in a one-and-a-half breaker busbar scheme. In this scheme, two lines connect to two buses through three circuit breakers, as shown in the diagram. When one line shuts down or switches off, … Read more