Cross-field ground fault sensor

Details Cross-field ground fault sensor Cross-field ground fault sensor

1975-12-03

1977-05-03

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324117R, 324127, 336175, 340255, 361 45, G01R 3102, G01R 1916

Patent

active

040217299

ABSTRACT:
A differential transformer having a core of low permeability ferromagnetic material, a pair of identical primary windings and a secondary winding of relatively few turns capable of producing a large voltage output for a small magnitude ground fault current. A cross-field winding is utilized to periodically saturate a portion of the flux path in the transformer core to produce sudden changes in magnetic flux, which flux changes vary in magnitude proportional to the amount of fault current. During the time interval when the cross-field portion of the sensor is not saturated by a pulse of sampling current, a second pulse of current is introduced into the sensor secondary winding for detecting a grounded neutral wire by sensing the output voltage produced in response thereto.

REFERENCES:
patent: 2739285 (1956-03-01), Windsor
patent: 3135911 (1964-06-01), Van Allen
patent: 3183498 (1965-05-01), Midis et al.
patent: 3617809 (1971-11-01), Penn et al.
patent: 3699442 (1972-10-01), Riley
patent: 3732463 (1973-05-01), Dale
patent: 3786356 (1974-01-01), MacPhee
patent: 3812428 (1974-05-01), Trenkler

Affiliated with

Also associated with

Rating

Cross-field ground fault sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cross-field ground fault sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cross-field ground fault sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-347941