Reclosing relay apparatus

Electricity: electrical systems and devices – Safety and protection of systems and devices – Automatic reclosing

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361 72, H02H 306, H02H 307

Patent

active

046046747

ABSTRACT:
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.

REFERENCES:
patent: 3560798 (1971-02-01), Tenebaum et al.
patent: 3801872 (1974-04-01), Zocholl et al.
patent: 3878436 (1975-04-01), Bogel
"Automatic Reclosing Relays", Bulletin 41-660--Westinghouse, May 1972.
"Type DRC Reclosing Relay", Bulletin 41-667--Westinghouse, Jul. 1973.
"Solid State Reclosing Relays", Bulletin 41-668--Westinghouse, Sep. 1972.

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