A trip unit for a circuit breaker includes a magnetic flux transfer system that employs a permanent magnet(s) and solenoid(s) with a ferromagnetic core. The system generates an attractive force using a solenoid to counter the force of a reset spring and latch friction force when a tripping condition is detected. The generated attractive force together with an attractive force from the magnet attracts a yoke which in turn moves the yoke together with an armature to the tripped position. The system also retains the yoke and armature in the tripped position using the attractive force of the magnet when the generated attractive force is no longer being generated. The system further generates a repulsive force using a solenoid when a resettable condition is satisfied to counter the attractive force of the magnet thereby allowing the yoke and armature to move from the tripped position to the reset position.

A downsized current sensor with a switch function is disclosed. The current sensor includes: a magnetic circuit to converge a magnetic flux generated from an electric circuit at a magnetic sensor; a switch to open and close the electric circuit in a way that operates together with a movable magnetic body configuring a part of the magnetic circuit; and a magnetizing coil to generate magnetic force enabling the movable magnetic body to be attracted to a fixed magnetic body configuring a part of the magnetic circuit.

A reset lockout mechanism for a circuit breaker includes a linkage, a rocker, an armature, a solenoid, and a plunger. The linkage is positioned to move between an open position and a closed position. The rocker is selectively engageable with the linkage. The armature is selectively engageable with the rocker. The plunger is supported by the solenoid and operatively coupled to the armature. The plunger is movable between a first position and a second position.

A circuit breaker having a mechanical switch which is inserted into a main current path and has a fixed contact and a moving contact which is connected to a contact bridge mounted movably thereto. The circuit breaker comprises a drive, which is operatively connected to the contact bridge, and a control unit, via which the drive is energized and which is powered from a control circuit. The drive has a “moving magnet actuator.”Further, a vehicle having the circuit breaker is provided.

A high speed closing switch includes a case having an interior which is hermetically closed, a ground electrode installed within the case, a high voltage electrode spaced apart from the ground electrode by a predetermined interval, a movable electrode configured to move from a first position in which the ground electrode and the high voltage electrode are not connected to a second position in which the ground electrode and the high voltage electrode are connected, a coil configured to generate electromagnetic force to cause the movable electrode to be moved from the first position to the second position, a returning rod having one end fixedly connected to the movable electrode and the other end protruding to outside of the case, and a driving device configured to drive the returning rod such that the movable electrode is moved from the second position to the first position.

A circuit breaker includes an electromechanical switch, a current sensor, a voltage sensor, and a processor. The electromechanical switch is serially connected between a line input terminal and a load output terminal of the circuit breaker, and configured to be placed in a switched-closed state or a switched-open state. The current sensor is configured to sense a magnitude of current flowing in a path between the line input and load output terminals and generate a current sense signal. The voltage sensor is configured to sense a magnitude of voltage at a point on the path between the line input and load output terminals and generate a voltage sense signal. The processor is configured to receive and process the current sense signal and the voltage sense signal to determine operational status information of the circuit breaker and determine power usage information of a load connected to the load output terminal.

A circuit breaker includes an electromechanical switch, a current sensor, a voltage sensor, and a processor. The electromechanical switch is serially connected between a line input terminal and a load output terminal of the circuit breaker, and configured to be placed in a switched-closed state or a switched-open state. The current sensor is configured to sense a magnitude of current flowing in a path between the line input and load output terminals and generate a current sense signal. The voltage sensor is configured to sense a magnitude of voltage at a point on the path between the line input and load output terminals and generate a voltage sense signal. The processor is configured to receive and process the current sense signal and the voltage sense signal to determine operational status information of the circuit breaker and determine power usage information of a load connected to the load output terminal.

A trip apparatus for a circuit interruption device that comprises a coil operatively connectable to a circuit interruption device. The coil is configured to selectively operate the circuit interruption device to interrupt when a current flowing through the circuit interruption device exceeds a threshold. The trip apparatus also includes a current measuring device configured to selectively measure a coil current flowing through the coil to determine a measured coil current signal. In addition, the trip apparatus includes a monitoring device configured to determine the derivative of the measured coil current signal and to perform a correlation of the derivative of the measured coil current signal and a reference derivative of a reference coil current signal to determine a correlation output. The monitoring device is further configured to compare the correlation output with a reference correlation threshold to determine whether an operating condition of the coil is normal or abnormal.

A switching device, for the on-off switching of a current passing through a current path, has at least one fixed contact and at least one movable contact, wherein the movable contact can be moved relative to the fixed contact for making or breaking the current path, and a drive for the functional movement of a jumper between a contact-making position and a contact-breaking position. In the contact-making position with the fixed contact, the movable contact makes the current path. The switching device includes a high-speed circuit breaker for breaking the current path in the event of a short circuit or overload, wherein the armature of the high-speed circuit breaker is rigidly coupled to the movable contact.

A modular circuit breaker includes a module assembly coupled to a primary assembly. The primary assembly includes a primary housing, separable contacts disposed therein, a first terminal conductor electrically connected to one of the separable contacts, a conductive tab electrically connected to another one of the separable contacts and which extends outward from a first end of the primary housing, an operating mechanism disposed in the primary housing for selectively opening and closing the separable contacts, and a trip mechanism disposed in the primary housing cooperative with the operating mechanism to trip open the separable contacts. The module assembly includes a module housing having a second terminal conductor positioned therein and electrically connected to the conductive tab, a third terminal conductor structured to be electrically connected to a neutral conductor of a load, and a fourth terminal conductor structured to be coupled to a neutral bus.