Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Reexamination Certificate
2007-05-22
2007-05-22
Jackson, Stephen W. (Department: 2836)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Magnetic saturation
C324S421000, C361S042000
Reexamination Certificate
active
10480090
ABSTRACT:
A combined toroid/shunt device for detecting residual current in an electrical installation comprising a plurality of conductors such as a live conductor (2) and a neutral conductor (3) is described. The device comprises a toroid means (1, 4) for detecting an AC residual current within a first range and a plurality of resistive shunts (6a) to (6d) for connection in respective ones of the plurality of conductors. A current detection means (5, 7, 13) responsive to current flowing in each of said shunts for detecting a DC residual current and/or an AC residual current within a second range is described. The first range of AC residual current is an AC residual current resulting from earth leakage or cross-leakage between conductors up to a saturation level at which the toroid or electronic means associated means therewith becomes saturated. The second range includes an AC residual current of said saturation level.
REFERENCES:
patent: 3024389 (1962-03-01), Van Cortlandt Warrington
patent: 4068276 (1978-01-01), Pintell
patent: 4278938 (1981-07-01), Morriss
patent: 4420721 (1983-12-01), Dorey et al.
patent: 5701253 (1997-12-01), Mayell et al.
patent: 6018700 (2000-01-01), Edel
patent: 6058354 (2000-05-01), Adame et al.
patent: 6646430 (2003-11-01), Skerritt et al.
patent: 6788067 (2004-09-01), Skerritt et al.
patent: 6791315 (2004-09-01), Skerritt et al.
patent: 0540379 (1992-09-01), None
patent: 2 430 680 (1980-03-01), None
patent: 2 590 030 (1987-05-01), None
patent: 2178915 (1987-02-01), None
patent: 2295284 (1996-05-01), None
Crosier Mark David
Murray Martin Anthony
Reeder Brian Martin
Benenson Boris
Eaton Electric Limited
Eckert Seamans Cherin & Mellott , LLC
Houser Kirk D.
Jackson Stephen W.
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