Electrical protection apparatus with circuit breaker and effecto

Details Electrical protection apparatus with circuit breaker and effecto Electrical protection apparatus with circuit breaker and effecto

1994-09-20

1996-07-23

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With arc-suppression or extinguishing means

218 17, H01H 930

Patent

active

055393659

ABSTRACT:
An electrical protection apparatus is disclosed, including a circuit breaker and an effector. The circuit breaker includes a first switch circuit including stationary and movable contacts, provided between input and output terminals. The effector includes a second switch circuit that is provided in series with the first switch circuit. Further, the circuit breaker includes an actuating mechanism for opening the contacts, electromagnetic and thermal trip devices for controlling the actuating mechanism, and first and second guiding horns spaced apart from each other and defining therebetween an arc extinguishing chamber. The first arc guiding horn is electrically connected with the movable contact to the input terminal, while the second arc guiding horn includes a switching electrode extending therefrom, the switching electrode being spaced apart from the stationery contact via an insulating gap. Upon forming an arc between the stationery and movable contacts by tripping of the apparatus, the arc switches to the switching electrode, thereby shunting the effector.

REFERENCES:
patent: 4616206 (1986-10-01), Bridges et al.
patent: 4654614 (1987-03-01), Chien et al.

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