AC current sensor

Details AC current sensor AC current sensor

1989-07-27

1991-10-15

Wieder, Kenneth

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

324117R, 324107, 336174, G01R 3300

Patent

active

050577697

ABSTRACT:
An AC current sensor comprising a generally C-shaped main coil with a fixed gap between its ends. A pair of compensating coils are positioned at fixed locations in the main coil's gap. The longitudinal axes of the compensating coils lie on an imaginary straight line which extends between the centers of the main coil's ends; and their electrical centers are each spaced the same distance from their respective ends of the main coil. A compensating coil gap is defined between the electrical centers of the compensating coils. The main coil defines a measuring recess in which the sensed AC current carrying conductor is located when a measurement is taken. When the ratio of the size of the main coil gap to the size of the compensating coil gap is equal to the square root of three, the AC current sensor's accuracy and outside signal rejection increase most rapidly with increased distance of the sensed AC current carrying conductor from the compensating coil gap, and the AC current sensor's size can be minimized. The main coil and the compensating coils are connected to a suitable amplifier and meter display.

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patent: 4482862 (1984-11-01), Leehey
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patent: 4839600 (1989-06-01), Kuurstra
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Universal Ammeter Holder (Universal Chuck Adapter); p. F-9 from 1985 Hastings Fiber Glass Products, Inc., Catalog, 12/85.

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