Sunday, June 9, 2013

PROTECTION FOR SPARE LINE




















The spare line portion can protect as below during temporary Energization or close the all cross bay CBs to connect 1A and 2A buses. 

There are two way to protect this portion 

1. Take any spare CT below the middle breaker for Bus bar protection to cover the spare line.
2. Enable the Over current and Earth Fault with 0.2 or 0.4 minimum setting in the Breaker failure relay.


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THIS IS SIVA T&C ENGINEER IN NCC LTD - SAUDI.