Short circuit detector and isolator

Details Short circuit detector and isolator Short circuit detector and isolator

1992-07-29

1995-03-21

Hoff, Marc S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 65, 361 93, 361 55, H02H 308

Patent

active

054002036

ABSTRACT:
An isolation circuit, which draws essentially zero current in a normal or stand-by state, uses a normally closed relay in combination with a storage element. A capacitor can be used as the storage element to energize the relay, using previously stored energy, in the event that a communication line to which the isolator is coupled exhibits a short circuit or low voltage condition. In this instance, the prestored energy on the capacitor activates the relay for a predetermined period of time, thereby open circuiting the communication line. When voltage is reapplied to one side of the isolator circuit, the relay is continuously energized and maintained in its open circuit condition until the low voltage or short circuit has been remedied.

REFERENCES:
patent: 3970898 (1976-07-01), Baumann et al.
patent: 4369435 (1983-01-01), Adachi et al.
patent: 4528610 (1985-07-01), Payne
patent: 5097259 (1992-03-01), Testa et al.

Affiliated with

Also associated with

Rating

Short circuit detector and isolator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Short circuit detector and isolator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Short circuit detector and isolator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1153901