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Transient recovery voltage considerations in the application of medium-voltage circuit breakers

机译:中压断路器应用中的瞬态恢复电压注意事项

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摘要

Medium-voltage circuit breakers can fail to interrupt three-phase fault currents when power systems have transient recovery voltage (TRV) characteristics which exceed the rating of the circuit breaker. This paper examines the application of 13.8-kV generation and load switchgear for an oil refinery in which circuit parameters as originally designed would have exceeded the 13.8-kV circuit breakers' TRV ratings had corrective measures not been taken. This paper illustrates this case and discusses the basis of TRV, how TRV is assessed, and alternative actions taken to bring circuits to within the 13.8-kV circuit breaker ratings.
机译:当电力系统具有超过断路器额定值的瞬态恢复电压(TRV)特性时,中压断路器可能无法中断三相故障电流。本文研究了在没有采取纠正措施的情况下,原设计的电路参数将超过13.8kV断路器的TRV额定值的炼油厂13.8kV发电和负荷开关设备的应用。本文说明了这种情况,并讨论了TRV的基础,TRV的评估方式,以及为使电路达到13.8kV断路器额定值而采取的替代措施。

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