Switchboard cell for receiving switchgear movable by positioning

Details Switchboard cell for receiving switchgear movable by positioning Switchboard cell for receiving switchgear movable by positioning

1986-12-19

1988-02-09

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

H01H 920

Patent

active

047242884

ABSTRACT:
A safety device against movement of switchgear in a switchboard cell with the door of the switchboard cell open, comprises a latch which cooperates with the recesses of a guide rod, the front end of which carries a stop. The stop precedes the head piece on the operating side of a threaded spindle of a positioning drive for a switchgear and can, with the door of the switching installation closed, be displaced by a tool provided for operating the threaded spindle, until the tool comes into engagement with the head. If the door of the switchboard cell is not closed, the latch engages one of the recesses of the guide rod of the stop and thereby prevents engagement of the tool with the head of the threaded spindle.

REFERENCES:
patent: 2673260 (1954-03-01), Lester et al.
patent: 2888615 (1959-05-01), Tusing
patent: 2921998 (1960-01-01), Pokorny et al.
patent: 3534186 (1970-10-01), Meyer
patent: 3783209 (1974-01-01), Cleaveland et al.
patent: 4041260 (1977-08-01), Swindler et al.
patent: 4112269 (1978-09-01), Nelson et al.
patent: 4419549 (1983-12-01), Osborne

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