Zero-phase current transformer

Details Zero-phase current transformer Zero-phase current transformer

1979-12-27

1982-04-13

Kozma, Thomas J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

336 83, 336100, 336174, 336212, H02H 328, H01F 4006

Patent

active

043250963

ABSTRACT:
A zero-phase current transformer for use as a leakage current detecting element in a leakage current interrupter in which two magnetic materials of different permeabilities are provided so as to eliminate a range where the leakage current interrupter is inoperable without lowering its ability to distinguish noise components. The different magnetic materials may be provided as a single core constructed by mixing the materials of different permeabilities. Otherwise, the materials can be provided as annually-shaped magnetic pieces stacked one on top of the other. Still further, the materials of different magnetic permeability may be provided as bands of materials interwound to form alternating layers or one of the materials may be provided as at least a portion of a protective case.

REFERENCES:
patent: 1736994 (1929-11-01), Clayton et al.
patent: 1880805 (1932-10-01), Christopher
patent: 3170133 (1965-02-01), Kernick
patent: 3315087 (1967-04-01), Ingenito
patent: 3739255 (1973-06-01), Leppent
patent: 3748618 (1973-07-01), Kaiserswerth et al.
patent: 3781740 (1973-12-01), Kirmis et al.

Affiliated with

Also associated with

Rating

Zero-phase current transformer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zero-phase current transformer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zero-phase current transformer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1419727