H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 71/24 (2006.01) H01H 71/50 (2006.01) H01H 71/02 (2006.01) H01H 71/10 (2006.01) H01H 71/16 (2006.01) H01H 71/40 (2006.01) H01H 71/58 (2006.01) H01H 83/20 (2006.01)
Patent
CA 2336766
The toggle mechanism of a circuit breaker is connected at one end to the pivoted contact arm and at the other end to a pivoted latch lever which is engaged to latch the toggle mechanism by a latch member pivoted for movement in a plane perpendicular to the plane of the toggle mechanism. The latch member serves as an armature for a trip motor energized by a trip circuit responsive to an arc fault and/or a ground fault to unlatch the toggle mechanism and trip the circuit breaker open. The latch member is also tripped by a helical bimetal responsive to persistent overcurrents and coupled to the latch member through an ambient compensator bimetal cantilevered from the latch member. A flexible shunt connected between the helical bimetal and contact arm passes through an extension of the magnetic, circuit of the trip motor to generate a magnetic field of sufficient strength to trip the latch member instantaneously in response to a short circuit.
Hall Thomas Michael
Hetzmanseder Engelbert
Mccormick James
Moldovan Peter Klaus
Rollmann Paul Jason
Borden Ladner Gervais Llp
Corporation Eaton
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