发明名称 |
SHIELDED CURRENT SENSING DEVICE FOR A WATTHOUR METER |
摘要 |
A current sensing device includes a secondary coil positioned within the curved portion of a U-shaped primary conductor or coil. The secondary coil is surrounded by a non-ferromagnetic metallic shield to prevent capacitive coupling between the windings of the secondary coil and other nearby metallic objects. A nonconductive material is integrally formed about the U-shaped conductor and provides a cavity for receiving the secondary coil and shield in a predetermined position with respect to the U-shaped conductor. A flux guide of ferromagnetic metal, formed in an elliptical-cylindrical shape, surrounds the U-shaped conductor and the secondary coil to provide a flux steering effect to steer flux around the secondary or pick-up coil. The current sensing device is useful in measuring current in electrical utility power monitoring or watthour meter applications.
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申请公布号 |
CA2081809(C) |
申请公布日期 |
1996.07.02 |
申请号 |
CA19922081809 |
申请日期 |
1992.10.30 |
申请人 |
LANDIS & GYR METERING, INC. |
发明人 |
VOISINE, JOHN T.;ANDERSON, CHRISTOPHER LEE;SLAVEN, ROBERT EDWARD;TATE, RONALD CHARLES |
分类号 |
G01R11/067;(IPC1-7):G01R11/00;G01R11/32 |
主分类号 |
G01R11/067 |
代理机构 |
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