Explosion-proof switching installation with a bus bar duct

Details Explosion-proof switching installation with a bus bar duct Explosion-proof switching installation with a bus bar duct

1983-06-02

1985-09-24

Pellinen, A. D.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

361335, 361378, H01H 2700

Patent

active

045434557

ABSTRACT:
A switching installation of explosion-proof design comprises a bus bar duct of the German protection class "Increased Safety" (Sch)e and housings of the German protection class "Explosion-Proof Enclosure" for accommodating switching devices. The electrical connection of the (Sch)d housings to the bus bar duct is accomplished by means of connectors, the jack part of which is fastened at the bus bar duct, and the plug part at the (Sch)d housings. Fastening means insure that the (Sch)d housings are connected to the bus bar duct sufficiently by the time the contact elements of the connectors come in contact with each other. In this condition, the plug connections already correspond to the protection class (Sch)d. In addition, an end switch is provided which makes it possible to attach the (Sch)d housings to the bus bar duct without load or without voltage. A protective lid can be flipped over the jack part of the connector if the (Sch)d housing is removed, in order to operate the end switch.

REFERENCES:
patent: 1793846 (1931-02-01), Durbin
patent: 3437768 (1969-04-01), Miller et al.
patent: 3763891 (1973-07-01), Buxton
patent: 4001653 (1977-01-01), Olashaw et al.
patent: 4041358 (1977-08-01), Donahue et al.
patent: 4068287 (1978-01-01), Kruzic et al.
patent: 4337972 (1982-07-01), Gill
patent: 4414440 (1983-11-01), De Coste

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