Circuit breaker contact arm assembly having a magnetic carrier

Details Circuit breaker contact arm assembly having a magnetic carrier Circuit breaker contact arm assembly having a magnetic carrier

1984-09-28

1986-06-10

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 42, 335195, H01H 7502

Patent

active

045945675

ABSTRACT:
A blow open contact arm assembly is provided for a molded case circuit breaker. A ferromagnetic carrier is attached to the movable contact arm and is positioned thereabout for creating a magnetic field about the movable contact arm which attracts the contact arm to the open position during severe fault conditions. The molded case housing has reinforced walls to withstand the pressures exerted on the walls of the houses during a blow open operation of the contacts.

REFERENCES:
patent: 3824508 (1974-07-01), Terracol
patent: 3887888 (1975-06-01), Bayles et al.
patent: 4488133 (1984-12-01), McClellan et al.

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