Self-coordinated device for the control and protection of electr

Details Self-coordinated device for the control and protection of electr Self-coordinated device for the control and protection of electr

1991-03-08

1992-06-02

Tolin, Gerald P.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335172, 335185, H01N 7500

Patent

active

051190532

ABSTRACT:
Self-coordinated device for the control and protection of electric motors and electrical equipment, for example, comprising, in a housing (2), a single control solenoid (5), a magnetothermal release device (M), a movable main contact (4) with a double break for each phase, which main contacts (4) are mounted on a contact-carrying bar (25) which is slidable and elastically preloaded (31), with which there interacts a composite mechanism (A) for the control of circuit-opening comprising two interacting mechanisms (B; C). One mechanism (B) interacts with the control solenoid (5) for desired circuit openings and for current surges. Both mechanisms (B; C) cause circuit-opening when short-circuit currents occur, more precisely with a double pushing action on the contact-carrying bar (25). The mechanism (C) also interacts with a locking mechanism (D) interacting in turn with a control knob (3) for the manual opening of the main contacts (4).

REFERENCES:
patent: 4495538 (1985-01-01), Thomas
patent: 4973929 (1990-11-01), Duchenin
patent: 5012214 (1991-04-01), Faffart
patent: 5055811 (1991-10-01), Kakizoe et al.

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