H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 71/12 (2006.01) H01H 71/74 (2006.01) H01H 73/02 (2006.01)
Patent
CA 2577561
An electrical switching apparatus includes a housing, separable contacts within said housing, an operating mechanism structured to open and close said separable contacts, and a trip assembly cooperating with said operating mechanism to trip open said separable contacts in response to a trip signal. The trip assembly includes a sensor structured to sense current flowing through said separable contacts, a number of breakpoint trip mechanisms providing a number of breakpoint trips in response to a number of time-current functions of said sensed current over a number of ranges of predetermined values of said sensed current, and a mechanism structured to provide said trip signal responsive to said number of breakpoint trips. A method of operating the electrical switching apparatus and a power distribution system incorporating the electrical switching apparatus are also provided.
Beatty William E. Jr.
Carlino Harry J.
Lagree James L.
Scheuring Leonard S.
Shaak Todd M.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Corporation Eaton
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