Terrorism and the Electric Power Delivery System (2012) / Chapter Skim
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Appendix F: Substation Configurations
Appendix F: Substation Configurations
Pages 134-136
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From page 134... ...
If it becomes neces- opening of the sectionalizing breakers preventing outages on sary to remove a circuit breaker from service for maintenance other bus sections. It is important to distribute circuits onto or repairs, circuit operation can be maintained through use of bus sections in a balanced way, so that sufficient transmisthe isolating switches and bus transfer equipment.
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From page 135... ...
A maintenance outage of a circuit breaker or circuit · A bus fault does not interrupt service on any circuit, causes an "open ring." For open-ring operation, a subsequent and circuit breaker failure causes loss of only one or circuit outage may cause outage of additional circuits. two circuits; The advantages of this scheme include: · Flexible operation; · High reliability; and · Low cost -- only one circuit breaker per circuit; and · Double feed to each circuit.
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From page 136... ...
bus arrangement for a generator terminal to provide equal access to either main bus. The primary disadvantage of this scheme is high cost because two circuit breakers are required for each circuit.
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