Electromechanical protection devcie

Details Electromechanical protection devcie Electromechanical protection devcie

1993-02-03

1995-04-25

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361102, 3611691, 361189, 361195, H02H 300, H01H 4714

Patent

active

054104424

ABSTRACT:
A hybrid switch is provided for switching a sink on and off. The hybrid switch contains a first semiconductor switch with a commutation switch. According to the present invention, a magnetic drive includes a first magnetic coil through which short-circuit current flows. A second semiconductor switch is connected in series with a second magnetic coil that series being connected in parallel to the series connection of the first magnetic coil and the sink. Short circuit flows through the first magnetic coil via the commutation switch which bridges at least the first semiconductor switch.

REFERENCES:
patent: 3985713 (1976-10-01), Frisch et al.
patent: 3999078 (1976-12-01), Udvardi-Lakos
patent: 4012673 (1977-03-01), Saarem et al.
patent: 4225895 (1980-09-01), Hjertman
patent: 4276631 (1981-06-01), Fujita et al.
patent: 4578734 (1986-03-01), Delbosse
patent: 4725911 (1988-02-01), Dieppedalle et al.

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