Electric protection device

Details Electric protection device Electric protection device

1982-06-11

1983-07-05

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 44, 361113, H02H 3347

Patent

active

043921744

ABSTRACT:
A protection device has first and second differential transformers each with a toroidal magnetic core through which pass the neutral and phase conductors of an alternating current distribution network, and a secondary winding. The secondary winding of the first transformer is coupled to the input of an amplifier followed by a rectifier, a threshold comparator and a control device adapted to release a circuit-breaker. The secondary winding of the second transformer is coupled to the output of the amplifier. The improvement is constituted by an auxiliary amplifier inserted between the output of the first amplifier and the terminals of the secondary winding of the second differential transformer.

REFERENCES:
patent: 3772569 (1973-11-01), Wible
patent: 3801871 (1974-04-01), Loh
patent: 3936699 (1976-02-01), Adams
patent: 3953766 (1976-04-01), Howell et al.
patent: 3973171 (1976-08-01), Howell

Affiliated with

Also associated with

Rating

Electric protection device does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1443032