Lockout and cover interlock for circuit breaker

Details Lockout and cover interlock for circuit breaker Lockout and cover interlock for circuit breaker

1976-04-09

1977-07-19

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

200 50A, 335160, 335172, H01H 8300, H01H 3348

Patent

active

040371840

ABSTRACT:
A molded case multi-pole circuit breaker is provided with a solid state trip unit having removable and replaceable rating plug. A mechanical interlock trips the circuit breaker when a cover portion thereof is opened. This cover portion must be opened to gain access to the rating plug. A mechanical lockout device is actuated when rating plug is removed to maintain the breaker tripped and to prevent resetting thereof until a rating plug is reinserted in the trip unit.

REFERENCES:
patent: 3368053 (1968-02-01), Groves
patent: 3826951 (1974-07-01), Mater et al.
patent: 4000478 (1976-12-01), Jencks et al.

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