Protection switch device

Details Protection switch device Protection switch device

1994-06-06

1996-03-26

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Multiple contact type

335172, H01H 6702

Patent

active

055024262

ABSTRACT:
A protection switch device has power poles whose mobile contacts are carried by a contact-holder, a magnetically and/or thermally tripped protection system to detect overloads or overcurrents on each pole current path and an actuator mechanism operated manually by an actuator button. This mechanism includes a permanent magnet lever cooperating with a magnetizable contact operating arm and a magnetizable tripping arm, movement of which is controlled by the protection system. The mechanism also includes a manual actuator for directly opening the power contacts of a overload relay or like device or, after turning the manual actuator button, opening an auxiliary contact to interrupt the current in a coil of a solenoid actuating a contactor/overload relay or like device.

REFERENCES:
patent: 4973929 (1990-11-01), Duchemin
patent: 5012215 (1991-04-01), Floc'h
patent: 5300906 (1994-04-01), Blanchard et al.

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