Coordination of Surge Arresters
Coordination of Surge Arresters
(OP)
Folks, please answer the following:
Is it good design practice from a coordination point of view to have station class arresters connected to a 69kV Bus in close proximity to surge arresters connected directly to the primary inputs of a 20MVA 69kV/12.47kV transformer connected to the same bus?
Thanks,
hidalgoe
Is it good design practice from a coordination point of view to have station class arresters connected to a 69kV Bus in close proximity to surge arresters connected directly to the primary inputs of a 20MVA 69kV/12.47kV transformer connected to the same bus?
Thanks,
hidalgoe






RE: Coordination of Surge Arresters
RE: Coordination of Surge Arresters
This is economical and may be OK for small substations but may compromise on protection to the equipment to some extent (depending on the margins in BIL of equipment vis-a-vis the expected residual voltage across the surge arrestor at the time of lightning strike).
RE: Coordination of Surge Arresters