Solid state inverse overcurrent relay

Details Solid state inverse overcurrent relay Solid state inverse overcurrent relay

1976-02-27

1977-10-18

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361103, H02H 308

Patent

active

040549348

ABSTRACT:
A solid state inverse overcurrent relay having a long slender wire connected to respond to a current which is proportional to the line current in a power system. An infrared detector or phototransistor is positioned to sense a predetermined color of radiation from the wire and is connected to fire a silicon controlled rectifier which is connected in series with a trip coil for a circuit breaker. The trip coil and silicon controlled rectifier are connected to an independent DC power source. The long slender wire on energization responds to the current which is proportional line current with the same time current characteristic as a fuse. In an alternate embodiment of the invention the relay is connected to the power system through a bridge rectifier which provides the DC current for operating both the heat responsive wire as well as the infrared detector.

REFERENCES:
patent: 3312895 (1967-04-01), Garbuny
patent: 3511999 (1970-05-01), Pelenc
patent: 3546531 (1970-12-01), Miner

Affiliated with

Also associated with

Rating

Solid state inverse overcurrent relay does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Solid state inverse overcurrent relay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid state inverse overcurrent relay will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1450567