Patent ID: 6504693
Filing Date: 2003-01-07
Classification: H02H

Abstract:
A network protector relay for controlling a circuit breaker connected between a polyphase feeder bus and a polyphase network bus, said network protector relay comprising:means for providing a positive sequence network voltage from polyphase network voltages on said network bus; means for providing a positive sequence phasing voltage from said polyphase network voltages on said network bus and polyphase feeder voltages on said feeder bus; means for automatically reclosing said circuit breaker in response to a function of a plurality of setpoints and said positive sequence phasing voltage which indicates a first flow of power from said polyphase feeder bus to said polyphase network bus; means for receiving a close command; and means for temporarily changing at least one of said setpoints in response to said received close command, in order to conditionally close said circuit breaker for a second flow of power from said polyphase feeder bus to said polyphase network bus, said second flow of power being less than said first flow of power.