Switching circuit and a relay device employed to prevent arcing

Details Switching circuit and a relay device employed to prevent arcing Switching circuit and a relay device employed to prevent arcing

1984-11-27

1988-09-20

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

3071414, 307137, 307135, 361 8, 361 13, H02H 722

Patent

active

047728094

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: 1857828 (1932-05-01), Wagar
patent: 2264986 (1941-12-01), Kovalsky
patent: 2449086 (1948-09-01), Price
patent: 2861147 (1958-11-01), Gouveld et al.
patent: 2902565 (1959-09-01), Angold
patent: 3156799 (1964-11-01), Depner
patent: 3330992 (1967-07-01), Perrins
patent: 3372303 (1968-03-01), Knott
patent: 3430063 (1969-02-01), Webb
patent: 3534222 (1970-10-01), Epler
patent: 3558910 (1971-01-01), Dale
patent: 3588605 (1971-06-01), Casson
patent: 3633069 (1972-01-01), Bernard
patent: 3639808 (1972-02-01), Ritzow
patent: 3736537 (1973-05-01), Dietsch et al.
patent: 3783305 (1974-01-01), Lefferts
patent: 3868549 (1975-02-01), Schaefer et al.
patent: 4038584 (1977-07-01), Tarchalski et al.
patent: 4125885 (1978-11-01), Lowther et al.
patent: 4156885 (1979-05-01), Baker et al.
patent: 4176388 (1979-11-01), Palmer
patent: 4251845 (1981-02-01), Hancock
patent: 4360740 (1982-11-01), Conard
patent: 4379237 (1983-04-01), Mosteller
patent: 4389691 (1983-06-01), Hancock
patent: 4420733 (1983-12-01), Palandri
patent: 4525762 (1985-06-01), Norris
Engineer, vol. 237, No. 6136, Oct. 13, 1973, pp. 52-57, London (GB), "Out of Its Splended Isolation Comes the Solid State Relay".

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