High voltage DC relays

Details High voltage DC relays High voltage DC relays

1990-02-02

1992-01-14

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

H01H 930

Patent

active

050815580

ABSTRACT:
A high voltage DC relay with arc suppression in which a MOSFET in parallel with the relay contacts is turned on during contact break mode by the controlled discharge of a capacitor between the MOSFET source and drain through a constant current diode to suppress arcing. A sensing coil positioned near the relay coil generates current used to charge the charging capacitor during the make contact mode to suppress arcing.

REFERENCES:
patent: 3639808 (1972-02-01), Ritzow
patent: 4658320 (1987-04-01), Hongel
patent: 4959746 (1990-09-01), Hongel

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