Molded case circuit breaker actuator-accessory module
AssigneeGeneral Electric Company
InventorRonald R. Russell
Life of this patent
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Abstract
An integrated protection unit is a circuit breaker which includes basic overcurrent protection facility along with selective electrical accessories. A molded plastic accessory access cover secured to the integrated protection unti cover protects the accessory components contained within the integrated protection unit cover from the environment. A combined overcurrent trip actuator and multiple accessory module is either field-installed or factory-installed within the integrated protection unit. A separate actuator-accessory module is selected for different combinations of accessory functions.
Claims40
A circuit breaker actuator-accessory module circuit comprising:
- an undervoltage release electromagnetic coil;
- a spring-biased plunger associated with said coil;
- an undervoltage control circuit connected with said coil, said undervoltage circuit including means for interrupting holding current to said coil and allowing said plunger to propel into contact with a trip lever upon receipt of a predetermined undervoltage signal to said undervoltage circuit;
- and
- an overcurrent control circuit interacting with said undervoltage circuit through an opto-isolator said overcurrent circuit including means for interrupting said holding current upon receipt of a predetermined overcurrent signal to said overcurrent circuit.
A circuit breaker actuator-accessory module circuit comprising:
- an undervoltage release electromagnetic coil;
- a spring-biased plunger associated with said coil;
- an undervoltage control circuit connected with said coil, said undervoltage circuit including means for interrupting holding current to said coil and allowing said plunger to propel into contact with a trip lever upon receipt of a predetermined undervoltage signal to said undervoltage circuit;
- an overcurrent control circuit interacting with said undervoltage circuit through a first opto-isolator, said overcurrent circuit including means to interrupt said holding current upon receipt of a predetermined overcurrent signal;
- and
- a shunt trip control circuit interacting with said undervoltage circuit through a second opto-isolator, said shunt trip circuit including means to interrupt said holding current upon receipt of an external command signal.
Dependencies are inferred from the claim text.