Secondary contacts for drawout switchgear

Details Secondary contacts for drawout switchgear Secondary contacts for drawout switchgear

1977-01-05

1979-02-13

Scott, James R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

H01H 920

Patent

active

041397487

ABSTRACT:
Retractable secondary contacts characterized by stationary and movable secondary contacts, one of which stationary and movable contacts is retractably mounted on a drawout circuit breaker, the other of which stationary and movable secondary contact is mounted on a cell into which the drawout circuit breaker is movable, one of the movable and fixed secondary contacts being retractably mounted to enable closing of the stationary and movable secondary contacts before closing of primary terminal means and after opening of the primary terminal means, whereby remote breaker operations, such as metering, may be tested prior to closing of the primary contact means.

REFERENCES:
patent: 2647247 (1953-07-01), Fulton et al.
patent: 2777024 (1957-01-01), West
patent: 2858389 (1958-10-01), Cuorato et al.
patent: 2883483 (1959-04-01), Horn
patent: 3188415 (1965-06-01), Netzel
patent: 3578925 (1971-05-01), Drown et al.
patent: 4020301 (1977-04-01), Ericson et al.

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