what type of protection and safety req. in the 220kv
substaion and area around the substation
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Answer Posted / atul pradhan
Protection:-
1)Distance prot. relay
2)local breaker back up LBB relay
3)differential prot. relay
4)pole discripency relay
5)trip ckt supervision of sf6 gas relay
6)air pressure monitoring relay
Safety precautions:-
1)remove all vegetation inside yard
2)proper earhing to fencing & gate
3)proper watering & checking of earth pits
4)periodical cleaning of all C.T.,P.T.,etc insulators
5)while opening or closing off load isolators always wears
H.T. gloves
6)while closing isolator ensure that all 3 poles fixed
properly
7)monitoring the leakage current of lightening arrestors
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