Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1983-12-08
1985-04-16
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200144AP, 335 16, 335195, H01H 3320, H01H 3316
Patent
active
045117748
ABSTRACT:
Current limiting stationary (2) and movable (6) contacts are arranged to provide spaced, parallel oppositely directed current paths therein whereby fault currents generate electromagnetic forces for repelling the movable contact (6) from the stationary contact (2). An electrically resistive arc runner (20) has an arc transfer segment (20a) disposed along the path of movement of the movable contact (6) and is biased at one end (20b) into current carrying engagement with a stop (22) on stationary contact (2). The other end of the transfer segment (20a) is connected through a major length of the arc runner (20) to the stationary contact (2) at a point distinct from stop (22). An arc drawn between the contacts (2, 6) at separation initially passes current to the transfer segment (20a) and the stationary contact (2) through stop (22). Gas pressure from the arc subsequently forces a separation of the arc runner end (20b) from the stop (22) whereby current is directed through the major length of the arc runner to the stationary contact for increasing the resistance of the arc for extinguishing the arc.
REFERENCES:
patent: 3092699 (1963-06-01), Latour
patent: 3555471 (1971-01-01), Mitskevich et al.
patent: 3728505 (1973-04-01), McConnell
patent: 3943473 (1976-03-01), Khalid
patent: 4237355 (1980-12-01), Fechant et al.
patent: 4430631 (1984-02-01), Forsell et al.
patent: 4451718 (1984-05-01), Yamagata et al.
Eaton Corporation
Grace C. H.
Macon Robert S.
Vande Zande L. G.
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