Electric current sensing device

Details Electric current sensing device Electric current sensing device

1988-10-14

1990-08-07

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324 99R, 324127, G01R 118, G01R 1706

Patent

active

049471082

ABSTRACT:
A magnetic circuit is coupled with a primary conductor in which flows the current to be sensed. The magnetic circuit has at least one air gap with a magnetic field detector and is coupled with at least one measuring coil producing a magnetic flux for compensating the flux generated by the primary current. The necessary current in the measuring coil to achieve such flux compensation is a measure for the primary current. A magnetic shielding part is provided in the vicinity of the air gap inside the measuring coil.

REFERENCES:
patent: 2134589 (1938-10-01), Stanek
patent: 2928048 (1960-03-01), Postal
patent: 3885212 (1975-05-01), Herbert
patent: 4413230 (1983-11-01), Miller
patent: 4656418 (1987-04-01), Boston et al.
patent: 4700131 (1987-10-01), Miller

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