Thermally tripped circuit breaker with adjustable tripping sensi

Details Thermally tripped circuit breaker with adjustable tripping sensi Thermally tripped circuit breaker with adjustable tripping sensi

1991-04-05

1992-10-06

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337 74, 337 82, H01H 7116

Patent

active

051535521

ABSTRACT:
A push button operated circuit breaker with thermal tripping by way of a bimetal strip includes an angled contact bridge which is mounted within a switch housing to be freely pivotal and is urged in a tripping direction by a tripping spring against a contact lug of the bimetal strip projecting laterally for engagement with a contact piece of the contact bridge. The circuit breaker further including a connecting arm which is coupled for movement with the bimetal strip. The cylindrical exterior surface of a drum-shaped rotary body lies against the connecting arm and thus creates a kinematic connection between the rotary body and the connecting arm. When the switch housing is fully assembled, the drum-shaped rotary body is operative as an adjustment eccentric which is externally manipulatable by way of a hexagonal recess so as to adjust the tripping characteristic of the circuit breaker.

REFERENCES:
patent: 3265832 (1966-08-01), Powell
patent: 4044325 (1977-08-01), Krasser et al.

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