Single or multipole circuit breaker

Details Single or multipole circuit breaker Single or multipole circuit breaker

1994-03-17

1995-09-19

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Operating means

200 50C, 200307, 200339, H01H 300, H01H 902

Patent

active

054517290

ABSTRACT:
A single- or multi-pole circuit breaker has a housing that includes a housing shell and a closure shell attached thereto to form a hollow chamber. The closure shell and the housing shell each having an inside wall surface extending parallel to a shell plane. The circuit breaker includes n-1, where n is an integer greater than 1, intermediate housing shells inserted between the housing shell and the closure shell, and having first and second wall surfaces corresponding to the housing shell wall surface and the closure shell wall surface, respectively. The first wall surface faces the closure shell wall surface, and the second wall surface faces the housing shell wall surface to form n hollow pole chambers. A switching mechanism for tripping the circuit breaker includes a switch lever located within each pole chamber. The switch lever has at least one of a trip lever and a latching lever. Each switch lever is attached to a respective wall surface and is axially seated to pivot in a plane of movement extending approximately parallel to the shell plane. At least one one-piece coupling rod penetrating each switch lever and each intermediate housing shell in a direction perpendicular to the shell plane is provided for coupling each switch lever together for common triggering of all poles.

REFERENCES:
patent: 3256407 (1966-06-01), Klein
patent: 3340374 (1967-09-01), Shiraishi et al.
patent: 3383486 (1968-05-01), Powell
patent: 3431517 (1969-03-01), Ellenberger
patent: 4167720 (1979-09-01), Krasser
patent: 4727226 (1988-02-01), Comtois et al.
patent: 4931762 (1990-06-01), Fierro
patent: 4937548 (1990-06-01), Sdunek
patent: 5079530 (1992-01-01), Tsuchiyama
E-T-A prospectus, "Program Overview: Thermal-Magnetic Circuit Breakers", Mar. 9, 1980.
E-T-A prospectus, "Switching, Protective and Control Devices, Overcurrent Circuit Brakers, Thermal, 1- and 3- Pole".

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