Transformer zero-phase current transformer
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMasahiro Ishikawa, Osamu Hasegawa, Yasuhiko Ookubo, Morio Machida
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Abstract
A control unit accommodates various equipment, such as a circuit breaker, an electromagnetic switch, a zero-phase current transformer, and an operating transformer. The zero-phase current transformer is generally triangular-shaped to fit more compactly within the control unit. More specifically, the zero-phase current transformer comprises an annular core having a shape which is substantially triangular, wherein the annular core encloses an aperture region having a shape which is also substantially triangular. A primary conductor is disposed within the aperture region, and a secondary conductor is wound on the annular core.
Claims4
A zero-phase current transformer comprising:
- an annular core having a shape which is substantially triangular, said annual core enclosing an aperture region having a shape which is also substantially triangular;
- three primary conductors disposed within and passing through said aperture region for carrying an AC current;
- and
- a secondary conductor wound on said annular core.
A control unit including:
- an enclosure;
- a zero-phase current transformer disposed within said enclosure;
- said zero-phase current transformer comprising:
- an annular core having a shape which is substantially triangular, said annular core enclosing an aperture region having a shape which-is also substantially triangular;
- three primary conductors disposed within and passing through said aperture region for carrying an AC current;
- and
- a secondary conductor wound on said annular core.
Dependencies are inferred from the claim text.