Compact low cost current sensor and current transformer core...

Details Compact low cost current sensor and current transformer core... Compact low cost current sensor and current transformer core...

2005-01-18

2005-01-18

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

C336S08400R, C336S173000

Reexamination Certificate

active

06844799

ABSTRACT:
A current sensor and current transformer for monitoring electrical current is provided with a magnetic core having a mixture of magnetic materials to provide a low cost design in a compact configuration with an expanded dynamic range. The mixed material core can be fabricated either from stamped laminations or from coil stock and may include an air gap for activating a magnetic flux sensor. Multiple core configurations, including Figure-O, Figure-C, and Figure-8, having mixed material construction are disclosed and offer advantages over non-mixed material cores where dynamic range and frequency response characteristics are a consideration.

REFERENCES:
patent: 3621334 (1971-11-01), Burns et al.
patent: 5495169 (1996-02-01), Smith
patent: 6018239 (2000-01-01), Berkcan et al.
patent: 01300506 (1980-12-01), None
patent: 56-067915 (1981-06-01), None

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