Circuit breaker electronic trip unit with adjustable settings

Details Circuit breaker electronic trip unit with adjustable settings Circuit breaker electronic trip unit with adjustable settings

1997-04-25

1998-10-13

Friedhofer, Michael A.

Electricity: circuit makers and breakers

Multiple circuit control

Operating means

H01H 7174

Patent

active

058214852

ABSTRACT:
A circuit breaker trip unit enclosure is adapted to receive rotary knobs that are limited in rotation in proportion to the circuit breaker short circuit rating. The externally-accessible rotary knobs extend within the enclosure to contact with a potentiometer affixed to the circuit breaker trip unit printed circuit board. A stop member is inserted within the enclosure access opening to detent the rotary knob shank that extends through the access opening.

REFERENCES:
patent: 3593234 (1971-07-01), Charbonneau et al.
patent: 3831120 (1974-08-01), Powell et al.
patent: 3975701 (1976-08-01), Hendry et al.
patent: 4351012 (1982-09-01), Elms et al.
patent: 4649455 (1987-03-01), Scott
patent: 4672501 (1987-06-01), Bilac et al.
patent: 4870531 (1989-09-01), Danek
patent: 5027091 (1991-06-01), Lesslie et al.
patent: 5204798 (1993-04-01), Scott
patent: 5467069 (1995-11-01), Payet-Burin et al.

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