Reclosing relay apparatus

Details Reclosing relay apparatus Reclosing relay apparatus

H - Electricity

02

H

348/18

H02H 3/06 (2006.01) H02H 3/07 (2006.01)

Patent

CA 1245336

ABSTRACT OF THE INVENTION A reclosing relay for reclosing a circuit breaker in an electrical power system. The reclosing relay is a multi-shot reclosing relay (i.e., providing more than one reclosure command to the circuit breaker) and includes primary and redundant lockout circuits for each reclose circuit. The primary lockout scheme employs a flip-flop, with a reset timer for resetting if the breaker remains closed after the first reclosure. The flip-flop is set when the circuit breaker recloses to lockout the first reclosure circuit. The redundant lockout circuit locks out the first reclosure circuit after a trip, reclose, and retrip sequence. The second reclose circuit includes similar primary and redundant lockout circuits.

482794

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