Patent ID: 8686815
Filing Date: 2014-04-01
Classification: H01H

Abstract:
1. For a circuit breaker having a switching shaft for simultaneously opening or closing three pole electrical power circuits and an overcurrent relay as a controller, an apparatus of modular trip mechanism and auxiliary mechanism for the circuit breaker, the apparatus comprising: an auxiliary mechanism module including a first micro switch to output an electrical signal indicating an ON or OFF position of the circuit breaker, a first shaft contact lever mechanism rotatable to operate the first micro switch by contacting the switching shaft or receiving an artificial pressing force for testing a normal or abnormal operation, a second micro switch to output an electrical signal indicating whether or not a trip operation of the circuit breaker has been performed, and a second lever rotatable to operate the second micro switch by contacting the switching shaft or receiving an artificial pressing force for testing a normal or abnormal operation; and a trip mechanism module including an electromagnetic trip device having a trip bar as an output unit so as to operate the trip bar to trigger the circuit breaker to a trip position in response to a trip control signal from the overcurrent relay or a test trip control signal from a test signal generating source, wherein the trip mechanism module further includes: a sub trip mechanism that outputs a mechanical trip signal by protruding an output pin, the sub trip mechanism including an under voltage trip device for outputting the mechanical trip signal when a voltage of a control power source or a voltage of an electrical power circuit is lowered below a predetermined reference voltage or a shunt trip device for outputting the mechanical trip signal when receiving a remote control signal; and an interlock lever having a power receiving portion installed at one side thereof to face the output pin so as to be contactable with the protruded output pin, the interlock lever being linearly moved in response to being pressed by the output pin to trigger the trip mechanism module.