Three-phase combined type circuit breaker

Details Three-phase combined type circuit breaker Three-phase combined type circuit breaker

1981-02-18

1983-11-22

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148F, H01H 3342

Patent

active

044171110

ABSTRACT:
A three-phase combined type circuit breaker is disclosed which comprises a common housing, three-phase interrupting units in said common housing, movable contacts of the interrupting units connected through link mechanisms to operating devices for three phases respectively provided outside of the common housing, the switching operation thus being performed by phase. Rotary shafts are disposed in substantially the same plane in the link mechanisms. Each of the rotary shafts is provided with a connector for the movable contact, a connector for the operating device, and a sealing arrangement positioned between the two connectors for allowing the rotary shaft to rotate while holding the common housing in hermetic condition. This construction makes up a three-phase combined type circuit breaker capable of being operated by phase. The arrangement and construction of the three-phase rotary shafts simplifies maintenance and inspection of the interrupting units and the operating devices.

REFERENCES:
patent: 3740506 (1973-06-01), Yoshioka et al.
patent: 3857006 (1974-12-01), Daimon et al.
patent: 3943777 (1976-03-01), Kishi et al.
patent: 4293747 (1981-10-01), Perulfi

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