Interlock scheme for drawout high amperage multi-pole circuit br

Details Interlock scheme for drawout high amperage multi-pole circuit br Interlock scheme for drawout high amperage multi-pole circuit br

1985-02-01

1988-03-01

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

H01H 920

Patent

active

047287578

ABSTRACT:
An interlock scheme is provided for preventing access to a draw-out mechanism of a drawout circuit breaker which is in a contact "closed" position and preventing the contacts from being closed when the circuit breaker is only partially connected to the power bus. A sliding door, carried by the front cover of the circuit breaker, is movable between a first position providing access to a driver shaft assembly for operation of the drawout mechanism and a second position preventing access to the driver shaft assembly. A plunger and slider assembly is operable associated with the access door to prevent the door from being moved from the second position to the first position unless the contacts within the circuit breaker are open. A trip arm prevents the contacts from being closed when the circuit breaker is only partially connected to the power bus.

REFERENCES:
patent: 4002865 (1977-01-01), Kuhn et al.
patent: 4206329 (1980-06-01), Jarosz

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