Switching current and a relay device employed therein

Details Switching current and a relay device employed therein Switching current and a relay device employed therein

1988-03-10

1989-08-08

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307115, 307134, 361 8, 361 13, 361100, 361104, H01H 3359

Patent

active

048556122

ABSTRACT:
A switching circuit for supplying electric power to a load from a power source includes a first relay device having a first switch and a semiconductor switching element connected in series with the first switch, power source and load. A second relay device is provided which is defined by a second switch connected parallelly to the semiconductor switching element and an actuating switch for enabling and disabling the semiconductor switching element. The second relay device is so arranged as to effect the make of the actuating switch and second switch in said order and to effect the break of the same in the opposite order. A delay circuit is provided for controlling the first and second relay devices such that when supplying a current to the load, the first and second relay devices are turned on in said order so that the first switch, the actuating switch and the second switch are turned on in said order. And, when cutting off the current to the load, the first switch, the actuating switch and the second switch are turned off in the opposite order.

REFERENCES:
patent: 3430063 (1969-02-01), Webb
patent: 3558910 (1971-01-01), Dale
patent: 3588605 (1971-06-01), Casson
patent: 3639808 (1972-02-01), Ritzow
patent: 3783305 (1974-01-01), Lefferts
patent: 3868549 (1975-02-01), Schaefer et al.
patent: 4038584 (1977-07-01), Tarchalski et al.
patent: 4156885 (1979-05-01), Baker et al.
patent: 4251845 (1981-02-01), Hancock
patent: 4389691 (1983-06-01), Hancock
patent: 4525762 (1985-06-01), Norris

Affiliated with

Also associated with

Rating

Switching current and a relay device employed therein does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switching current and a relay device employed therein, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching current and a relay device employed therein will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-907868