Dual power source retrofit kit with power source selection inter

Details Dual power source retrofit kit with power source selection inter Dual power source retrofit kit with power source selection inter

1997-12-05

1999-11-02

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

200 5033, H01H 920

Patent

active

059774924

ABSTRACT:
A dual power source retrofit kit for a single power source service entrance panel. The retrofit kit is a field installable kit for retrofitting a single power source service entrance panel to a dual power source service entrance panel. The kit includes a power source selection assembly and a mounting bracket for attaching to the service entrance panel. A deadfront trim plate having a cut-out to accept the power source selection assembly is also supplied to replace the old trim plate of the service entrance panel. The power source selection assembly permits only the selected one of the primary or auxiliary power sources to provide power to the service entrance panel at any one time. The power source selection assembly is also designed such that overload protection devices/disconnect switches for both the primary power source and the auxiliary power source must be in the OFF position before switching from one power source to the other is permitted.

REFERENCES:
patent: 2647964 (1953-08-01), Merkel
patent: 2929002 (1960-03-01), Wurgler
patent: 3432628 (1969-03-01), Puetz
patent: 3801758 (1974-04-01), Shand et al.
patent: 4924041 (1990-05-01), Yee
patent: 5008499 (1991-04-01), Yee et al.
patent: 5393942 (1995-02-01), Reiner et al.
patent: 5648646 (1997-07-01), Flegel
Square D Catalog, 3 pp., Jan. 1996.

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