CIRCUIT BREAKER INCLUDING UNDERVOLTAGE RELEASE MECHANISM AND CONTROL CIRCUIT

CIRCUIT BREAKER INCLUDING UNDERVOLTAGE RELEASE MECHANISM AND CONTROL CIRCUIT A circuit breaker including a solid-state circuit for providing regulated current to operate a holding coil for an undervoltage release mechanism. An alternating current control line feeds a full wave bridge rectifier in th...

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Bibliographic Details
Main Authors WILSON, JOHN T, LANG, WALTER W
Format Patent
LanguageEnglish
French
Published 25.09.1979
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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Summary:CIRCUIT BREAKER INCLUDING UNDERVOLTAGE RELEASE MECHANISM AND CONTROL CIRCUIT A circuit breaker including a solid-state circuit for providing regulated current to operate a holding coil for an undervoltage release mechanism. An alternating current control line feeds a full wave bridge rectifier in the control circuit to provide pulsating direct current to a reference voltage supply circuit, a current regulating circuit, and the holding coil of an undervoltage release mechanism. The current regulating circuit comprises two series connected units of an integrated circuit quad current differential operational amplifier. The output of the second unit controls the base current of a regulating transistor which is series connected to the holding coil. The reference voltage supply circuit includes a transistor connected as a variable resistor to provide operation of the circuit over a wide range of input voltages without excessive heat generation.
Bibliography:Application Number: CA19760255499