Circuit breaker including power supply monitor circuit to...

Details Circuit breaker including power supply monitor circuit to... Circuit breaker including power supply monitor circuit to...

H - Electricity

01

H

H01H 71/00 (2006.01) H01H 75/00 (2006.01) H02H 1/06 (2006.01)

Patent

CA 2398980

A circuit breaker includes separable contacts, an operating mechanism, a power supply, and a trip mechanism powered from a first power supply output. A power supply monitor circuit includes a terminal adapted for electrical connection to a ground, a first resistor electrically connected in series with a power supply regulator, a first transistor having an output and two inputs electrically connected in parallel with the first resistor, a first capacitor electrically connected between the first power supply output and the first transistor output, a second resistor electrically connected in series with the first capacitor between power supply outputs, a second transistor having a first input electrically interconnected with the first transistor output, a second input and an output, a diode electrically connected between the terminal and the second transistor second input, and an interface between the second transistor output and a trip mechanism input for disabling the tripping.

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