Measurement shunt with compensation for induced error voltages

Details Measurement shunt with compensation for induced error voltages Measurement shunt with compensation for induced error voltages

1983-04-27

1985-01-15

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

338 49, G01R 120, H01C 500

Patent

active

044940688

ABSTRACT:
A measurement shunt comprises a resistance provided with first and second voltage terminals and intended to provide a voltage representative of an electric current passing through it, and an inductance connected to at least the first of said voltage terminals to produce between first and second measurement terminals a voltage free of error voltages induced in said resistance, even in the presence of a variable magnetic field. The resistance is essentially constituted by a plate (12) of electrically conductive material, the first and second voltage terminals (26,28) are disposed on the same edge of the plate at spaced apart points thereon, and the inductance comprises at least one open loop (36a) at least partly formed from an electrically conductive material extending from its first and second ends respectively disposed in the vicinity of the first and second voltage terminals, towards the interior of the surface of the plate in a plane having, at least approximately the same direction as the plate.

REFERENCES:
patent: 496501 (1893-05-01), Weston
patent: 1084721 (1914-01-01), Willis
patent: 1100708 (1914-06-01), Brooks
patent: 2640092 (1953-05-01), Fett et al.
patent: 3359488 (1967-12-01), Park

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