Abstract: A tripping device of a circuit breaker of the present disclosure may reinforce a magnetic force on a main magnetic flux path using a plurality of magnetic force reinforcing plates without using an additional plate yoke on an actuator provided in the circuit breaker to miniaturize the size of the actuator, thereby having an effect of allowing a control circuit unit provided at an outer portion of the circuit breaker to be installed at an inner portion of the circuit breaker to miniaturize the whole size of the circuit breaker.

Abstract: Provided is a molded case circuit breaker eliminating the necessity to install a communication unit and a particular communication medium and allowing for checking an fault type from a front indication operation panel of an enclosure of a power distributing board or from a remote area by simply connecting two signal lines for transmitting a relay switching signal as an accident current indication signal, the circuit breaker comprises a relay assembly including a plurality of fault indicating relays installed in the circuit breaker and configured to generate a fault current indication signal by opening or closing a contact when the indication command signal of a fault current is received from the electronic trip unit, and a signal output terminal configured to output a fault type indication signal of the fault indicating relays to the outside of the circuit breaker.

Abstract: A tripping device of a circuit breaker of the present disclosure may reinforce a magnetic force on a main magnetic flux path using a plurality of magnetic force reinforcing plates without using an additional plate yoke on an actuator provided in the circuit breaker to miniaturize the size of the actuator, thereby having an effect of allowing a control circuit unit provided at an outer portion of the circuit breaker to be installed at an inner portion of the circuit breaker to miniaturize the whole size of the circuit breaker.

Abstract: Provided is a molded case circuit breaker eliminating the necessity to install a communication unit and a particular communication medium and allowing for checking an fault type from a front indication operation panel of an enclosure of a power distributing board or from a remote area by simply connecting two signal lines for transmitting a relay switching signal as an accident current indication signal, the circuit breaker comprises a relay assembly including a plurality of fault indicating relays installed in the circuit breaker and configured to generate a fault current indication signal by opening or closing a contact when the indication command signal of a fault current is received from the electronic trip unit, and a signal output terminal configured to output a fault type indication signal of the fault indicating relays to the outside of the circuit breaker.

Abstract: A current detecting mechanism according to this invention includes a direct current shunt having a plurality of resistor members with high resistivity to output an electric potential difference across the resistor members, proportional to a current flowing through an electric load side terminal, as a voltage signal, and a hall sensor assembly having a pair of magnetic cores installed to face each other with an air gap therebetween, and a hall sensor to output an output voltage according to a magnetic flux induced in proportion to a current flowing through a load side terminal, without being connected with the direct current shunt, of load side terminals.

Abstract: An apparatus of modular trip mechanism and auxiliary mechanism for a circuit breaker comprises an auxiliary mechanism module including a first micro switch to output an electrical signal indicating an ON/OFF position of the circuit breaker, a first shaft contact lever mechanism to operate the first micro switch by contacting the switching shaft or receiving an artificial pressing force, a second micro switch to output an electrical signal indicating whether a trip operation of the circuit breaker has been performed, and a second lever to operate the second micro switch by contacting the switching shaft or receiving an artificial pressing force; and a trip mechanism module including an electromagnetic trip device to operate a trip bar to trigger the circuit breaker to a trip position in response to a trip control signal from an overcurrent relay or a test trip control signal from a test signal generating source.

Abstract: A current detecting mechanism according to this invention includes a direct current shunt having a plurality of resistor members with high resistivity to output an electric potential difference across the resistor members, proportional to a current flowing through an electric load side terminal, as a voltage signal, and a hall sensor assembly having a pair of magnetic cores installed to face each other with an air gap therebetween, and a hall sensor to output an output voltage according to a magnetic flux induced in proportion to a current flowing through a load side terminal, without being connected with the direct current shunt, of load side terminals.

Abstract: A circuit breaker comprises a magnetic trip mechanism configured to provide a first mechanical driving force, a low voltage trip mechanism configured to provide a second mechanical driving force, a first micro switch configured to generate and output a first trip signal indicating that the circuit breaker has performed a trip operation due to the occurrence of a fault current on a circuit, a second micro switch configured to generate and output a second trip signal indicating that the circuit breaker has performed a trip operation due to the occurrence of a low voltage on the circuit, a first driving force transmission mechanism configured to transmit the first mechanical driving force from the magnetic trip mechanism to the first micro switch, and a second driving force transmission mechanism configured to transmit the second mechanical driving force from the low voltage trip mechanism to the second micro switch.

Abstract: An apparatus of modular trip mechanism and auxiliary mechanism for a circuit breaker comprises an auxiliary mechanism module including a first micro switch to output an electrical signal indicating an ON/OFF position of the circuit breaker, a first shaft contact lever mechanism to operate the first micro switch by contacting the switching shaft or receiving an artificial pressing force, a second micro switch to output an electrical signal indicating whether a trip operation of the circuit breaker has been performed, and a second lever to operate the second micro switch by contacting the switching shaft or receiving an artificial pressing force; and a trip mechanism module including an electromagnetic trip device to operate a trip bar to trigger the circuit breaker to a trip position in response to a trip control signal from an overcurrent relay or a test trip control signal from a test signal generating source.

Abstract: A circuit breaker comprises a magnetic trip mechanism configured to provide a first mechanical driving force, a low voltage trip mechanism configured to provide a second mechanical driving force, a first micro switch configured to generate and output a first trip signal indicating that the circuit breaker has performed a trip operation due to the occurrence of a fault current on a circuit, a second micro switch configured to generate and output a second trip signal indicating that the circuit breaker has performed a trip operation due to the occurrence of a low voltage on the circuit, a first driving force transmission mechanism configured to transmit the first mechanical driving force from the magnetic trip mechanism to the first micro switch, and a second driving force transmission mechanism configured to transmit the second mechanical driving force from the low voltage trip mechanism to the second micro switch.

Abstract: A circuit breaker having a hybrid arc-extinguishing function includes: an upper shell; a lower shell coupled to the upper shell to form an extinguishing chamber (S) filled with an insulation gas; a movable electrode movably installed at the upper shell and having an exhaust channel for discharging a gas inside the extinguishing chamber (S) outwardly; a fixed electrode having an exhaust channel fixed at the lower shell and positioned at a coaxial line with the movable electrode, through which the gas inside the extinguishing chamber (S) is discharged outwardly, the movable electrode being movable being movable to a position where it contacts with the fixed electrode and to a positioned where it is separated from the fixed electrode; a magnetic coil arranged around the fixed electrode to form a magnetic field for a rotation of an arc, and receiving a conductive current from the movable electrode as being shared with the fixed electrode when the movable electrode is positioned contacting with the fixed electrode

Abstract: A circuit breaker having a hybrid arc-extinguishing function includes: an upper shell; a lower shell coupled to the upper shell to form an extinguishing chamber (S) filled with an insulation gas; a movable electrode movably installed at the upper shell and having an exhaust channel for discharging a gas inside the extinguishing chamber (S) outwardly; a fixed electrode having an exhaust channel fixed at the lower shell and positioned at a coaxial line with the movable electrode, through which the gas inside the extinguishing chamber (S) is discharged outwardly, the movable electrode being movable being movable to a position where it contacts with the fixed electrode and to a positioned where it is separated from the fixed electrode; a magnetic coil arranged around the fixed electrode to form a magnetic field for a rotation of an arc, and receiving a conductive current from the movable electrode as being shared with the fixed electrode when the movable electrode is positioned contacting with the fixed electrode