Panelboard having panel-mounted interlock for two main circuit b

Details Panelboard having panel-mounted interlock for two main circuit b Panelboard having panel-mounted interlock for two main circuit b

1994-03-23

1995-02-28

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

361627, H01H 926

Patent

active

053939425

ABSTRACT:
An interlock between two main circuit breakers comprises a bracket mounted to the interior panel transversely of the panel and a sliding interlock member mounted on a forward portion of the bracket, which portion fits within the unmodified opening of a panelboard cover and fills the space within the opening between the two main circuit breakers. Padlock hasps may be provided on the interlock member to additionally lock either or both main circuit breakers in an OFF condition. Tabs on the bracket overlie forward facing surfaces of the main circuit breakers to block removal of the main circuit breakers while the bracket is installed.

REFERENCES:
patent: 3196227 (1965-07-01), Carter et al.
patent: 3319020 (1967-05-01), Shaffer
patent: 3369100 (1968-02-01), Kussy et al.
patent: 3611048 (1971-10-01), Shelvik
patent: 3801758 (1974-04-01), Shand et al.
patent: 4270031 (1981-05-01), Borona et al.
patent: 4435739 (1984-03-01), Shelvik
patent: 4924041 (1990-05-01), Yee
patent: 5008499 (1991-04-01), Yee et al.
Two photographs marked "Cutler-Hammer, Jul. 27, 1988, Catalog CH063MEN60, Bell Labs, 3A. Photo No. CH P-16 and CH P-17."
Photograph marked "Cutler-Hammer CH7 BBSM". Records indicate this photograph was made Oct. 21, 1988.

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