Power limiter for electrical contacts

Details Power limiter for electrical contacts Power limiter for electrical contacts

1985-04-11

1987-11-10

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 2, H02H 324

Patent

active

047061510

ABSTRACT:
A bias control circuit controlling the power transistor Q2 in a transistor amplifier circuit for supressing the arc formed across the contacts 12, 14, 16 in a glow plug controller 10 for diesel engines. The bias circuit generates a load line for the contacts 12, 14, 16 which has a high voltage, low current portion and a high current, low voltage portion. The arc is formed when the contact 14, which may be slow operating, is required to break a high current, high voltage line.

REFERENCES:
patent: 3430063 (1969-02-01), Webb
patent: 3641407 (1972-02-01), Scott
patent: 4250531 (1981-02-01), Ahrens
patent: 4389691 (1983-06-01), Hancock
patent: 4636907 (1987-01-01), Howell

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