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US 5,177,433 AGranted
Current-voltage transformer for electronic house-service meter
AssigneeSiemens Aktiengesellschaft
InventorsManfred Schwendtner, Gunter Steinmuller, Wolfgang Dohmstreich
Life of this patent
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Abstract
The current transformer of an electronic house-service meter has a ferromagnetic core which, except for an air gap, is closed. A measuring coil is inserted in the air gap and is fastened, and dimensioned so that it lies within the cross sectional area of the core.
Claims8
A current-voltage transformer for electronic house-service meters comprising:
- a winding having a current flowing in it to be measured by the electronic house-service meter;
- a ferromagnetic core having an air gap;
- and
- a measuring coil, magnetically coupled with said winding via said ferromagnetic core, wherein said measuring coil is inserted into the air gas with the coil axis in the direction of field lines, which arise in said air gap due to said current flowing in said winding, and is fastened, and dimensioned so that said measuring coil lies within the cross sectional area of the core, whereby said measuring coil measures a magnetic field in said air gap and thus said current flowing in said winding.
1 more element
Dependencies are inferred from the claim text.