Abstract: A manual charging apparatus for a vacuum interrupter, including a motor for charging a closing spring mounted on a vacuum interrupter; a charging shaft configured to rotate by a rotational force of the motor; and a manual charging handle coupled to one end of the charging shaft and configured to manually rotate the manual charging handle, wherein the manual charging handle includes an insertion part formed in an cylindrical shape and inserted into one end of the charging shaft; an extension part vertically bent from the insertion part and extended to increase a revolution torque; and a handle part vertically bent from the extension part and configured to apply a manual operation force, and wherein the insertion part includes a rotation restriction means configured to restrict a rotation in one direction.

Abstract: Disclosed is a device for detecting an output current of an inverter. The device for detecting an output current of an inverter according to the present disclosure includes a shunt resistor connected to an output end of a capacitor of a direct current (DC) link; a detector connected to the shunt resistor and configured to detect the output current; and a controller configured to control a sampling timing of a current in the detector.

Abstract: Disclosed herein are a method and an apparatus for generating a random PWM voltage reference signal for driving an inverter, which can more simply generate random position PWM (RPPWM) in which a position of an active vector is changed to achieve the same effect as when a switching frequency is changed.

Abstract: The constant voltage supplying circuit for a circuit breaker according the invention comprises: a first switching device; a constant current source configured to supply a constant current; a feedback circuit section commonly connected to an output terminal of each of the first switching device and the constant current source; a constant voltage source connected to the feedback circuit section, and configured to supply a constant voltage; a current adjusting circuit section connected to the output terminal of the first switching device, and configured to adjust an output current of the first switching device; and a divided voltage resistor section including a first resistor and a second resistor, and configured to provide a divided voltage of an output voltage of the constant voltage supplying circuit, to the feedback circuit section, through a connection node between the first resistor and the second resistor.

Abstract: Disclosed herein is a board apparatus including a printed circuit board, including a first ground wiring disposed on one surface of the printed circuit board; a second ground wiring disposed on the other surface of the printed circuit board; and a switch module disposed in an overlapped region between the first ground wiring and the second ground wiring, and including a bolt which penetrates through the printed circuit board and a nut which is in contact with the second ground wiring and is coupled to a screw of the bolt.

Abstract: An electric energy storage apparatus according to an embodiment may include a grid configured to supply first electric energy; a generator configured to supply second electric energy; and an electric energy storage apparatus configured to receive and store at least one of the first electric energy and the second electric energy, and supply the stored electric energy or the received electric energy to an electric load, wherein the electric energy storage apparatus senses a magnitude of electric energy discharged to the grid in an operation mode of supplying the stored electric energy to the electric load, and changes the operation mode when the sensed magnitude of electric energy exceeds a preset first threshold value.

Abstract: The present invention relates to a multi-pole molded case circuit breaker, more particularly, to a multi-pole molded case circuit breaker having a safety device (with an isolation function) which prevents a manipulation handle from being moved to an off-position when a fusion occurs on a contact portion.

Abstract: A reactive power compensator includes a plurality of phase clusters each including plurality of cells and a controller configured to control the plurality of phase clusters. The controller performs control to generate an offset signal through phasor transformation based on respective voltage values and current values of the plurality of phase clusters and to compensate for energy errors between the plurality of phase clusters based on the generated offset signal.

Abstract: The present invention relates to a withdrawable arc eliminator having an interlock function, and more particularly, to a withdrawable arc eliminator having an interlock function capable of preventing insertion or withdrawal of an arc eliminator applied to an electrical panel, in a closed state of the arc eliminator.

Abstract: The present disclosure relates to an extinguishing unit for a molded case circuit breaker, and more particularly, to an extinguishing unit for a molded case circuit breaker that has grids double-arranged in an extinguishing part to improve arc extinguishing performance. According to an embodiment of the present disclosure, an extinguishing unit for a molded case circuit breaker includes a pair of side plates arranged to face each other and a plurality of grids arranged in a space defined between the pair of side plates, wherein the grids include a plurality of first grids arranged at a front portion of the pair of side plates; and a plurality of second grids arranged at a rear portion of the pair of side plates, wherein a re-division space for re-dividing an arc is defined between the first grids and the second grids.

Abstract: The PLC according to the present disclosure includes a control module configured to perform a control operation according to a preset program; a first communication module configured to transmit a control command from the control module to at least one of first external devices; and a second communication module configured to transmit the control command from the control module to at least one of second external devices, wherein the first and second communication modules transmit external data to the control module via a data transmission cable which is shared with each other, and check interrupt signals therebetween to alternately transmit the external data to the control module, respectively.

Abstract: Provided is an analog input and output module, the module comprising a first signal processing unit configured to separate analog signal inputted from a plurality of HART transmitters from first HART data, convert the analog signal to digital data, transmit the first HART data to a second signal processing unit, and transmit second HART data received from the second signal processing unit to at least one of the plurality of HART transmitters; and the second signal processing unit configured to control the first signal processing unit and storing conversion result.

Abstract: The present disclosure relates an interlock device for preventing insertion or withdrawal of a circuit breaker into or from a switch board having an ON button and an OFF button and including a switch board body provided with a housing and a rail having an interruption hole formed on one side surface thereof, a carriage movable back and forth along the rail of the switch board body, and the circuit breaker including a main body installed on the carriage and inserted into or withdrawn from the switch board body, the interlock device comprising an interlock rod protruding toward one side to set or release a pressed state, wherein the interlock rod is set in or released from the pressed state and inserted into or disengaged from the interruption hole when the main body is put in or tripped.

Abstract: Disclosed embodiments relate to a power monitoring system. In some embodiments, the power monitoring system includes: a sampling device configured to measure patterns of how loads included in the power system consume energy; an electric meter configured to measure a first amount of energy supplied from a transmission system to the power system; a power supply configured to supply power stored therein or generate power to supply it to the power system, and measure a second amount of energy supplied to the power system; an external server configured to receive measurements of the patterns from the sampling device, and obtain a third amount of energy consumed by the loads based on the measurements; and a home server configured to receive the first amount of energy and/or second amount of energy and transmit/receive data to/from the external server.

Abstract: A mechanism coupling structure of a molded-case circuit breaker according to an embodiment of the present disclosure including a shaft to one side of which a movable contactor is coupled, and on a part of which a rotating pinhole is formed in a penetrating manner; a base assembly into which the shaft is rotatably accommodated and coupled, a switch mechanism coupled to an upper portion of the base assembly and exposed with a first lower link and a second lower link at a lower side thereof, and a rotating pin coupled in a penetrating manner to the first lower link, second lower link and rotating pinhole may be provided therein, wherein the rotating pin has a protruding portion for release prevention at one end thereof.

Abstract: The present disclosure relates to an apparatus for updating an OS (Operating System) in PLC (Programmable Logic Controller) configured to update an OS in a PLC, and to perform an operation by instantly applying the updated OS to the PLC, and a method using the same, the apparatus including an MPU (Micro Processing Unit), a flash memory, a second working memory, and a switching unit.

Abstract: An interlock apparatus of a ring main unit is provided. The interlock apparatus may be provided between a plurality of switches which are included in the ring main unit and are adjacent to each other, and when one switch is controlled to a closed state and is connected to a power supply source, the other switch adjacent to the one switch is prevented from being connected to the power supply source, thereby preventing the plurality of switches from being simultaneously connected to the power supply source.

Abstract: An apparatus of sliding a submodule includes a sliding rail part installed on one side of a cabinet; a submodule capable of being entered into or withdrawn from the cabinet; and a sliding guide part installed at one side of the submodule and slidingly moved by the sliding rail part. The sliding rail part may include a rail body, first and second extending parts extending from opposite ends of the rail body, and first and second sliding rails connected to the first and second extending parts respectively and protruding toward the sliding guide part.

Abstract: The present invention relates to an air circuit breaker, in which a recess is formed on one side or each of both sides of each contact plate provided in an insulating cage so as to reduce a contact area between a movable contactor and the contact plate when the movable contactor and the contact plate are brought into contact with each other, thereby preventing a contact portion between the movable contactor and the contact plate from being melted due to heat generation.

Abstract: An apparatus for controlling an inverter is disclosed. The apparatus for controlling the inverter contained in an inverter system configured to drive a motor determines a slip frequency to be used for compensation of a frequency of a first reference voltage, not only using a first reference voltage (including an amplitude and frequency) of the first reference voltage applied to the inverter, but also using an output current of the motor or a rotor speed of the motor. The apparatus determines not only a frequency of a second reference voltage obtained by compensation of the slip frequency, but also an amplitude of the second reference voltage corresponding to the frequency of the second reference voltage.