Methods of arc suppression and circuit breakers with electronic

Details Methods of arc suppression and circuit breakers with electronic Methods of arc suppression and circuit breakers with electronic

1994-10-31

1997-05-13

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With arc-suppression or extinguishing means

218 4, H01H 930

Patent

active

056296584

ABSTRACT:
Methods of arc suppression connecting a PTC material in parallel with a pair of contacts but in series with a second pair of contacts. The PTC material could be doped-BaTiO.sub.3 -ceramics, conductive polymer, or metallic PTC materials. The two pairs of contacts should be so mechanically associated that the second pair of contacts must be always opened right after the opening of the first pair. It is enough for some applications to connect one pair of contacts in parallel with a polyswitch or BaTiO.sub.3 -ceramics. For medium and high voltage circuit breakers, more than two pairs of contacts may be needed, and all these contacts should be opened sequentially during a circuit interruption. According to the methods, simple structured circuit breakers can be made to protect circuits from a short circuit, an overload and a ground fault. The circuit breaker invented here can provide an electronic alarm signal when a fault current occurs. The principle of the electronic indication of a fault current is applicable to any circuit breakers. By adding a series coil around the same core of the trip coil in a common ground fault circuit interrupter or receptacle, the interrupter or receptacle can be improved to act as a circuit breaker.

REFERENCES:
patent: 2539567 (1951-01-01), Best
patent: 4282462 (1981-08-01), Peil et al.
patent: 4485283 (1984-11-01), Hurtle
patent: 4819120 (1989-04-01), O'Leary
patent: 4878038 (1989-10-01), Tsai
patent: 5105178 (1992-04-01), Krumme
patent: 5379176 (1995-01-01), Bacon et al.

Affiliated with

Also associated with

Rating

Methods of arc suppression and circuit breakers with electronic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods of arc suppression and circuit breakers with electronic , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of arc suppression and circuit breakers with electronic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1388286