Zero current circuit interruption

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor

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Details

361 87, 361102, 335 19, H02H 300

Patent

active

057711453

ABSTRACT:
Each pole of a multi-pole circuit breaker is equipped to individually separate the circuit breaker contacts within each pole upon overcurrent occurrence. A digital processor within the circuit breaker trip unit determines the occurrence of zero current crossing of phase current within the individual poles and initiates contact separation at zero current values.

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patent: 4301489 (1981-11-01), Stich
patent: 4583146 (1986-04-01), Howell
patent: 4645889 (1987-02-01), Howell
patent: 4672501 (1987-06-01), Bilac et al.
patent: 5453724 (1995-09-01), Seymour et al.
patent: 5563459 (1996-10-01), Kurosawa et al.
patent: 5566041 (1996-10-01), Rumfield

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