High inrush current circuit breaker

Details High inrush current circuit breaker High inrush current circuit breaker

1984-06-01

1985-03-12

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Retarded or delayed type

335 63, 335239, H01H 703

Patent

active

045048070

ABSTRACT:
A magnetic circuit breaker has a U-shaped magnetizable plate between the solenoid coil and the plastic spool flange located below the pole piece that is engaged by the armature to trip the breaker. This U-shaped disc diverts some of the instantaneous flux created by an inrush current spike away from the pole piece to prevent premature or "instantaneous" tripping of the breaker until a predetermined multiple of rated current is exceeded. In the preferred embodiment this disc is provided in a slot formed in the plastic spool flange itself.

REFERENCES:
patent: 3740650 (1973-06-01), Grenier et al.
patent: 3777294 (1973-12-01), Grenier

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