Electrical transmission or interconnection systems – Plural load circuit systems – Selectively connected or controlled load circuits
Patent
1986-08-29
1989-06-20
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural load circuit systems
Selectively connected or controlled load circuits
307 101, 307 39, 307 35, 361 92, 361104, 219497, 340642, H02J 314, G08B 1900
Patent
active
048411590
ABSTRACT:
A switching system for powering first and second electrical loads from a voltage supply, the electrical loads being operable from controls and adapted to be connected to the voltage supply by the switching system. The switching system includes switching circuitry having a control element which is responsive to a control voltage difference to cause the switching circuitry to become conductive, the switching circuitry having a switch terminal connected to a first supply line and another switch terminal connected to the first electrical load. The switching system also includes additional circuitry responsive to the controls for generating the control voltage difference when the voltage supply is connected to the first supply line thereby powering the first electrical load from the first supply line. The switching system further includes further circuitry responsive to the controls for generating first and second control signals. Also included in the switching system is a contactor responsive to the second control signal for connecting the voltage supply to a second supply line, the second electrical load connected to the second supply line and another contactor responsive to the first control signal for connecting the second supply line to the first supply line thereby connecting the voltage supply to the first supply line and for disconnecting the second supply line from the first supply line to interrupt power through the switching circuitry thereby discontinuing the supply of power to the first electrical load. Other forms of the switching system and a testing system are also disclosed.
REFERENCES:
patent: 2874337 (1959-02-01), Sorensen
patent: 2991397 (1961-07-01), Place
patent: 3066284 (1962-11-01), McKinley et al.
patent: 3532936 (1970-10-01), Kuster
patent: 3609459 (1971-09-01), Thompson
patent: 3946279 (1976-03-01), Paice et al.
patent: 3975663 (1976-08-01), Moorey
patent: 4038584 (1977-07-01), Tarchalski et al.
patent: 4042864 (1977-08-01), Norris
patent: 4053868 (1977-10-01), Cox et al.
patent: 4159501 (1979-06-01), White
patent: 4259659 (1981-03-01), Ariyoshi et al.
patent: 4296450 (1981-10-01), Paice et al.
patent: 4340920 (1982-07-01), Gill et al.
patent: 4451822 (1984-05-01), Verse et al.
patent: 4454555 (1984-06-01), DeLacy
patent: 4499385 (1985-02-01), Slavik
patent: 4509102 (1985-04-01), Ayer
patent: 4554439 (1985-11-01), Cross et al.
patent: 4589049 (1986-05-01), Krumrein
patent: 4612595 (1986-09-01), Gill et al.
patent: 4629976 (1986-12-01), Pipkorn
patent: 4639609 (1987-01-01), Floyd et al.
patent: 4659942 (1987-04-01), Volp
Evans Vernon C.
Heidinger George H.
Ip Paul
Peabody Coal Company
Shoop Jr. William M.
LandOfFree
Switching and testing system 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 and testing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching and testing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-526991