Ground leakage current protection system

Details Ground leakage current protection system Ground leakage current protection system

1974-12-16

1977-09-06

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 85, H02H 328

Patent

active

040470792

ABSTRACT:
A circuit interrupter responsive to ground-fault conditions is disclosed that is rendered relatively immune to many possible failures of components and connections. A differential current transformer has a pair of differential primary windings in series with the conductors of the protected load circuit (or a ground-fault-current primary winding in a modification), and a secondary winding in control of an AC-energized SCR that controls a "hold-in" coil of a circuit interrupter, and an AC - excited biasing winding. The arrangement is such that, in the absence of ground fault current, the hold-in coil is energized, whereas in case of a ground fault the AC biasing flux is opposed so as to be cancelled or reversed, releasing the circuit interrupter for opening.

REFERENCES:
patent: 3558980 (1971-01-01), Florance et al.

Affiliated with

Also associated with

Rating

Ground leakage current protection 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 Ground leakage current protection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground leakage current protection system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2164874