Operating device for a circuit breaker

Details Operating device for a circuit breaker Operating device for a circuit breaker

1994-12-12

1996-08-06

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Plural magnets or flux sources

335242, 335172, H01H 900

Patent

active

055437664

ABSTRACT:
An electro-magnetic operating device 10 for a circuit breaker includes a coil 12 which defines a cavity 14. A pair of elements 34, 44 are slidably arranged within the cavity 14, a first element 34 being operable to cause a time delay tripping of the circuit breaker and a second element 34 being operable to cause a substantially instantaneous tripping of the circuit breaker. A first pole piece 22 is associated with the first element. A linkage 64 is carried by the second element 44 for linking the second element to a moving contact carrier 66 of the circuit breaker. A frame 18, which defines a magnetic path, is arranged about at least a part of the coil 12, the magnetic frame 18 defining a second pole piece 40 which is aligned with the first pole piece 22. The first pole piece 22 and the elements 34, 44 are displaceable towards the second pole piece 40 to effect tripping of the circuit breaker.

REFERENCES:
patent: 3533033 (1970-10-01), Allen
patent: 5343178 (1994-08-01), Bagalini
patent: 5402092 (1995-03-01), Bagalini

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