Electricity: electrical systems and devices – Safety and protection of systems and devices – Arc suppression at switching point
Patent
1977-09-06
1980-01-15
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Arc suppression at switching point
361 57, 361 58, H02H 308
Patent
active
041841867
ABSTRACT:
This current limiting device comprises a normally-closed source-side circuit interrupter, a normally-closed load-side circuit interrupter, an electrical conductor connected between the interrupters for connecting the interrupters in series, and a normally-open switch that can be closed to connect the conductor to ground via a low-impedance conductive path located electrically between the interrupters. A switch operator acts to rapidly close the switch in response to a fault on the power circuit extending through the series combination of interrupters, thereby connecting the conductor to ground through the switch. The switch operator closes the switch within 1/4 cycle of power frequency current after fault inception, thereby effecting current-limiting action with respect to current through the series combination of interrupters on the load side of the conductive path to ground. The interrupters are opened in response to the fault by the switch operator acting through a mechanical connection between the switch operator and the interrupters. Such interrupter-opening occurs sufficiently rapidly that the source-side interrupter interrupts the current therethrough at the first natural current zero following fault-inception. An impedance connected in parallel with the series combination of the interrupters conducts current, limited in magnitude by impedance, around the interrupters when the two interrupters have interrupted the currents therethrough following their opening.
REFERENCES:
patent: 1667662 (1928-04-01), Holbrook
patent: 3227924 (1966-01-01), Wutz
patent: 3660721 (1972-05-01), Baird
patent: 3873887 (1975-03-01), Barkan et al.
Freedman William
General Electric Company
Pellinen A. D.
Silverman Carl L.
LandOfFree
Current limiting device for an electric power 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 Current limiting device for an electric power system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current limiting device for an electric power system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1030476