Fault indicator with flux concentrating means

Details Fault indicator with flux concentrating means Fault indicator with flux concentrating means

1980-03-20

1983-03-01

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonquantitative

324 51, 324115, 324127, 340664, G01R 3102, G01R 1914, G01R 1510

Patent

active

043756174

ABSTRACT:
A fault indicator for indicating the occurrence of a fault current in an electrical conductor includes an externally viewable target which is positioned to a fault-indicating position by a trip circuit within the indicator upon occurrence of a fault current. The trip circuit is responsive to a magnetic field within a predetermined sensing plane generally parallel to the conductor. To increase the sensitivity of the indicator to the magnetic field of the conductor, the fault indicator includes flux concentrating pole pieces which form a low reluctance magnetic circuit between the circumference of the conductor and the sensing plane.

REFERENCES:
patent: 3518544 (1970-06-01), Tachick
patent: 3528009 (1970-09-01), Astrove
patent: 3600293 (1971-08-01), Hyduh et al.
patent: 3816816 (1974-06-01), Schweitzer, Jr.
patent: 3906477 (1975-09-01), Schweitzer, Jr.
patent: 4086529 (1978-04-01), Schweitzer, Jr.

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