Current transformer for three-phase systems
AssigneeMoeller GmbH
InventorRupprecht Gabriel
Life of this patent
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Abstract
The invention relates to a current transformer for three-phase systems and it used to detect currents, for example with three-phase current meters or electronic devices which trigger low voltage protection breakers. The invention aims at developing a current transformer that can be produced and fixed in a simple and low cost fashion and permitting to measure total current. Therefore, four mutually spaced apart, parallel, identical cylindrical conversion coils (4-7) are provided. In each case, a three-phase current lead (1, 2, 3) runs between two conversion coils (4-5, 5-6, 6-7) arranged adjacent and substantially normal to their longitudinal axes (10). Conversion coils (4-7) are held headwise through two low coercivity yokes (8, 9) extending in their longitudinal axes plane.
Claims21
A current transformer for three phase current systems consisting of:
- four like cylinder-shaped transformer coils (4 through 7) are disposed parallel relative to each other;
- and further comprising:
- three current conductors forming a three phase current conductor unit, wherein
- in each case one of the three phase current conductors (1;
- 2;
- 3) runs between in each case two neighboring transformer coils (4,5;
- 5,6;
- 6,7) and substantially perpendicular to longitudinal axes (10) of the transformer coils (4, 5;
- 5, 6;
- 6, 7);
- wherein the transformer coils (4 through 7) are supported between two soft magnetic yokes (8,9) extending in a common plane of the longitudinal axes (10) of the transformer coils (4 through 7) in a direction disposed perpendicular to a direction of the longitudinal axes.
A current transformer for three phase current systems consisting of:
- four like cylinder-shaped transformer coils disposed parallel relative to each other and at a distance from each other and each having a longitudinal axis;
- and comprising:
- three current conductors forming a three phase current conductor, wherein each one of the three phase current conductors runs between two respective neighboring cylinder-shaped transformer coils and wherein each one of the three phase current conductors runs essentially perpendicular to a plane spanned by the longitudinal axes of the transformer coils;
- two soft magnetic yokes supporting the transformer coils, wherein the two soft magnetic yokes extend in a plane of the longitudinal axes of the transformer coils and in a direction perpendicular to a direction of the longitudinal axes of the transformer coils.
A current transformer for three phase current systems consisting of
- exactly four like cylinder-shaped transformer coils disposed parallel relative to each other and at a distance from each other and each having a longitudinal axis;
- and comprising
- three current conductors forming a three phase current conductor, wherein each one of the three phase current conductors runs between two respective neighboring cylinder-shaped transformer coils and wherein each one of the three phase current conductors runs essentially perpendicular to a plane spanned by the longitudinal axes of the transformer coils;
- two soft magnetic yokes supporting the transformer coils on an end side, wherein the two soft magnetic yokes extend in a plane of the longitudinal axes of the transformer coils and in a direction perpendicular to a direction of the longitudinal axes of the transformer coils.
Dependencies are inferred from the claim text.