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Secondary Selective Substations?

asked Sep 21, 2016 in Engineering by julien.cargill (1,080 points)

What does it mean by "secondary selective substations"?

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answered Sep 22, 2016 by antonjoh (2,870 points)
Secondary Selective Substations are substations that having two busses, each supplied by a normally-closed incoming line circuit breaker and connected together by a normally-open bus tie circuit breaker.  Although the name is derived from designs utilizing two transformers, the design is applicable (with appropriate functional deletions) to dual-fed substations without transformers.

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