Apparatus for equipment unit protection switching

Details Apparatus for equipment unit protection switching Apparatus for equipment unit protection switching

1991-09-27

1993-03-09

Shoap, Allan N.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200292, 200318, 200322, 340687, 361399, H01H 304, H01H 320

Patent

active

051919702

ABSTRACT:
An equipment unit protection switch from an in-service equipment unit to a standby equipment unit is realized prior to any movement of the active equipment unit about to be removed from an equipment frame in which it is inserted. This is achieved by advantageously incorporating apparatus for generating an equipment unit removal indication signal that enables a controller to anticipate the removal of the equipment unit from the equipment frame. To this end, the equipment units employ an equipment unit latch and an associated switch to generate the equipment removal indication signal. Initial movement of the latch causes the equipment unit removal indication signal to be generated prior to any movement of the equipment unit in the frame in which it is inserted.

REFERENCES:
patent: 4596907 (1986-06-01), LaGreco et al.
patent: 4614389 (1986-09-01), Albert et al.
patent: 4914550 (1990-04-01), Filsinger et al.
patent: 4949035 (1990-08-01), Palmer, II
patent: 4952758 (1990-08-01), Dara et al.
patent: 4967312 (1990-10-01), Ozawa et al.
patent: 5065141 (1991-11-01), Whitsitt

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