H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/282
H01H 71/10 (2006.01) H01H 83/20 (2006.01)
Patent
CA 1118824
SHUNT TRIP MECHANISM FOR A CIRCUIT INTERRUPTING DEVICE ABSTRACT: A shunt trip mechanism includes a ratchet facility added to a self-contained, line potential stored- energy operating mechanism of a circuit interrupting device. Operation of the ratchet facility releases the stored energy to operate the device. A portion of the ratchet facility may also be operated to reset the device if it has previously been operated by either the shunt trip mechanism or the operating mechanism's current-responsive elements. The main portion of the shunt trip mechanism is at ground potential and is mechanically tied to and operates the ratchet facility by a movable insulated strut. The strut is moved by the shunt trip mechanism upon the occurrence of an event such as transformer overpressure. A ground level handle may be operated to reset the device whether it was operated by the operating mechanism or the shunt trip mechanism.
331139
Bernatt Joseph
Vojta Karel E.
Osler Hoskin & Harcourt Llp
S&c Electric Company
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