INDUSTRY ACADEMIC COOPERATION FOUNDATION, HALLYM UNIVERSITY (Republic of Korea)
Inventor
Ryu, Hyungjoon
Jeong, Yunsang
Choi, Hoyoung
Kim, Joonhui
Park, Doo Jae
Abstract
A particle measurement device and method capable of increasing the measurement accuracy of particles contained in a sample are provided. The particle measurement device comprises: a sample tube in which a sample is accommodated; a light source for irradiating the sample tube with light; an optical system including a camera for capturing particles contained in the sample; and an adjustment unit for adjusting the incline of the camera so that a focal plane of the optical system can be inclined with respect to a central axis of the sample tube inside the sample tube.
G01N 15/0227 - Investigating particle size or size distribution by optical means using imagingInvestigating particle size or size distribution by optical means using holography
Disclosed is an uninterruptible power supply system comprising an energy storage system (ESS). The uninterruptible power supply system comprises an ESS and is connected to a grid, and further comprises: a first converter for converting an alternating current voltage of the grid into a direct current voltage; a second converter connected in series to the first converter, for converting the direct current voltage outputted from the first converter into an alternating current voltage and transferring same to a load; the ESS comprising a battery connected to a node between the first and second converter, for performing charging and discharging; and a PLC for receiving the operation statuses of the first and second converters, and on the basis thereof, controlling the operation of the uninterruptible power supply system, wherein the PLC determines the operation mode of the ESS by using the received operation statuses of the first and second converters.
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 9/00 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
3.
Power conversion device utilizing a relay unit with multiple relays
A power conversion device comprises: a DC link capacitor charged with a DC power supplied from a power supply part; a fuse part, for breaking a current which is output from or supplied to the power supply part and has a first breaking magnitude or greater; a relay part which comprises a first relay for connecting a positive terminal of the fuse part to a positive terminal of the DC link capacitor and a second relay for connecting a negative terminal of the fuse part to a negative terminal of the DC link capacitor; an initial charge part, for charging the DC link capacitor by using DC power supplied from the power supply part; and a power conversion part for converting the direct-current power supplied from the power supply part into AC power when the DC link capacitor has been charged and supplying the alternating-current power to a load terminal.
H02M 1/36 - Means for starting or stopping converters
H02M 7/537 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
The present invention relates to a hybrid energy storage system. The hybrid energy storage system according to an embodiment of the present invention manages the power of a system and a direct current (DC) distribution network connected to the system, and comprises: a first DC-DC converter connected to the DC distribution network; a super capacitor connected to the first DC-DC converter and having the charge and discharge thereof controlled by the first DC-DC converter; a second DC-DC converter connected to the DC distribution network; and a battery connected to the second DC-DC converter and having the charge and discharge thereof controlled by the second DC-DC converter, wherein the first DC-DC converter comprises a DC distribution network stabilization controller, which filters the noise of a system voltage applied to the DC distribution network, and then generates a damping current so as to stabilize the DC distribution network.
The present disclosure relates to an energy storage system for managing power of a system and a DC power distribution network linked with the system. In one embodiment, the system comprises a first converter connected between the system and the DC power distribution network so as to control voltage of the DC power distribution network; a second converter connected to the DC power distribution network; a battery which is connected to the second converter and in which a charging/discharging operation is controlled by the second converter; a third converter connected to the DC power distribution network; an emergency generator which is connected to the third converter and in which a power is controlled by the third converter; a fourth converter connected to the DC power distribution network; and a first load which is connected to the fourth converter and in which a voltage is controlled by the fourth converter.
H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
The present disclosure relates to an arc extinguishing unit of a molded case circuit breaker with a barrier provided between a fixed contact and a movable contact when a circuit is cut off. The arc extinguishing unit includes fixed contacts fixed to part of a base assembly case; movable contacts that contact or are separated from the fixed contacts; and an arc extinguishing part that extinguishes an arc generated when the movable contacts are separated from the fixed contacts. The arc extinguishing part includes a pair of side plates; multiple grids installed at a fixed interval between the side plates; and arc barriers each rotatably installed on the side plates, and configured to open between the movable contacts and the fixed contacts by being rotated when a current flows on the circuit, and to close between the movable contacts and the fixed contacts when the current is cut off.
A coil control device of an electronic magnetic contactor, comprises: an input power processing unit configured to convert and output an input power into a direct current power; an input voltage detecting unit configured to detect a voltage level of the direct current power outputted from the input power processing unit; a control unit configured to output a control signal for controlling current flowing in a coil using the voltage level detected by the input voltage detecting unit; and a switching unit configured to connect or cutoff the current flowing in the coil by switching according to the control signal from the control unit, wherein the control unit includes a gate driver electrically connected with the switching unit and configured to block noise from the coil.
H01H 47/24 - Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil having light-sensitive input
H01H 47/00 - Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
H01H 47/32 - Energising current supplied by semiconductor device
The present invention relates to an energy storage system. An energy storage system according to an embodiment of the present invention relates to an energy storage system for managing a grid and power of a direct current (DC) power distribution network associated with the grid, the energy storage system comprising: a first converter connected between a grid and the DC power distribution network so as to control voltage of the DC power distribution network; a second converter connected to the DC power distribution network so as to detect voltage of the DC power distribution network; a battery connected to the second converter, wherein the second converter controls charging/discharging of the battery; a rectifier connected in parallel to the first converter; and a first higher layer controller for controlling the first converter, the second converter, and the rectifier, and determining a limit voltage of the DC power distribution network and whether to drive the rectifier, on the basis of a state of the first converter.
Proposed is a heatsink module for an inverter. The heatsink module includes a housing a bottom face, both spaced side walls, and both flanges. The heatsink module include a heat-dissipation plate including a base fixed to the both flanges; and a plurality of heat-dissipation fins extending downward from a bottom of the base. The heatsink module includes a supporter interposed between the bottom face of the housing and the heat-dissipation fins. The supporter has slots defined therein for accommodating at least portions of the heat-dissipation fins respectively.
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
F28F 3/06 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being attachable to the element
F28D 1/02 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid
A unit power cell of an inverter system, according to one embodiment of the present invention, comprises: a first leg including first and fourth switching elements, which are connected in series to each other, second and third switching elements, which are connected in series with each other between a connection point of the first and second switching elements and a smoothing unit, and first, second, third and fourth diodes, which are inversely and respectively connected in parallel with the first, second, third and fourth switching elements; and a second leg connected in parallel with the first leg and including fifth and sixth switching elements, which are connected in series to each other, and fifth and sixth diodes, which are inversely and respectively connected in parallel with the fifth and sixth switching elements.
H02M 7/483 - Converters with outputs that each can have more than two voltage levels
H01F 30/12 - Two-phase, three-phase or polyphase transformers
H02M 1/12 - Arrangements for reducing harmonics from AC input or output
H02M 7/217 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/537 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
16.
Earth leakage circuit breaker capable of outputting type of leakage current and method of controlling the same
An earth leakage circuit breaker and a method of controlling the same are disclosed. An earth leakage circuit breaker according to the present disclosure can detect a type of leakage current and output the type of the leakage current in various forms such that a user can recognize the type of the leakage current. Therefore, the user can easily recognize whether or not the leakage current has occurred and the type of the leakage current. This may facilitate the user to recognize the cause of the leakage and take an effective measure for preventing an accident.
G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
H02H 1/00 - Details of emergency protective circuit arrangements
H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
A hierarchical power control system associated with a cloud server includes a first microgrid cell, a second microgrid cell, a third microgrid cell, a middleware server, and an integrated control system. The first microgrid cell includes a first energy storage system (ESS) having an uninterruptible power supply (UPS) structure and a first load having a power state managed by the first energy storage system (ESS). The second microgrid cell includes a second load and a second energy storage system (ESS) for managing a power state of the second load. The third microgrid cell includes a third load. The middleware server communicates with the first to third microgrid cells. The integrated control system receives power supply-demand state information of the first to third microgrid cells through the middleware server, and establishes an integrated operation schedule based on the received power supply-demand state information of the first to third microgrid cells.
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
G05B 15/02 - Systems controlled by a computer electric
The present disclosure relates to a circuit breaker equipped with an energy release device of a switching mechanism, and particularly, to a circuit breaker equipped with an energy release device that allows energy of a closing spring of a switching mechanism to be automatically discharged at the time of a withdrawal operation.
A heat exhaust and dustproof system of a multi-stage distributing board according to an embodiment of the present disclosure includes: multiple compartments provided at a cabinet of a distributing board; and multiple flaps provided at each of the multiple compartments, wherein the flaps are provided with multiple outlets for heat emission.
The present invention relates to a communication data modeling method. The communication data modeling method according to one embodiment of the present invention comprises the steps of: identifying a service list of an electronic device; making a first communication data sheet for communication protocol standards of the electronic device; making a second communication data sheet for products related to the electronic device; making a final communication data sheet by combining the first communication data sheet and the second communication data sheet; and creating a communication data model on the basis of the final communication data sheet.
The present invention pertains to a microgrid system. A microgrid system according to an embodiment of the present invention is a microgrid system that is operated while separated from a power grid, wherein said microgrid system comprises: a first microgrid that includes a first load, a first ESS, a first distributed power system and a first controller; and a second microgrid that includes a second load, a second ESS, a second distributed power system and a second controller, and wherein a line connecting the first and the second microgrid is opened and closed using a relay, and the first and the second controller determine whether to open or close the relay by communicating with one another.
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
22.
Interface conversion device of programmable logic controller (PLC) system and PLC system thereof
The present disclosure relates to an interface conversion device of a programmable logic controller (PLC) system and a PLC system thereof. The interface conversion device of a PLC system according to an embodiment of the present disclosure is an interface conversion device that is applied to a PLC system including a base unit that controls an operation of the PLC system, a plurality of expansion modules that operate under the control of the base unit, and an interface that is a communication line between the base unit and each of the expansion modules, and is configured to connect between a first interface for parallel communication and a second interface for serial communication.
G06F 3/00 - Input arrangements for transferring data to be processed into a form capable of being handled by the computerOutput arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
The energy storage system according to one embodiment comprises a first converter connected between the system and the DC distribution network, and converting an AC voltage of the system into a DC voltage and transmitting the DC voltage to the DC distribution network; a second converter connected to the DC distribution network and controlling the voltage of the DC distribution network; a battery connected to the second converter and of which the charging and discharging are controlled by the second converter; a third converter connected to the DC distribution network; and a first load connected to the third converter and of which the voltage is controlled by means of the third converter, wherein the first converter generates a power control instruction for controlling at least one of the battery and the first load on the basis of SOC information of the battery and power consumption information of the first load.
H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
24.
Method for recovering EEPROM of slave device by PLC communication module
Disclosed is a method for automatically recovering data of an electronically erasable programmable read only memory (EEPROM) storing configuration information of a slave device by a programmable logic controller (PLC) communication module using an EtherCAT network when the data of the EEPROM is modified or incorrect.
G06F 11/10 - Adding special bits or symbols to the coded information, e.g. parity check, casting out nines or elevens
G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
G06F 11/14 - Error detection or correction of the data by redundancy in operation, e.g. by using different operation sequences leading to the same result
The present invention relates to an earth leakage circuit breaker and a method for controlling the earth leakage breaker, wherein the earth leakage breaker is formed between three-phase electrical lines and a single-phase load connected to two electrical lines of the three-phase electrical lines. The earth leakage breaker is characterized by comprising: a zero-phase current detection unit for detecting a zero-phase current generated in a zero current transformer formed in the three-phase electrical lines; a voltage detection unit for detecting a voltage from each of the two electrical lines; a trip unit for tripping contact points between the two electrical lines and the single-phase load when a trip signal is inputted; and a control unit which, when the zero-phase current is detected by the zero-phase current detection unit, detects an electrical line, in which the voltage has dropped by a predetermined level or more, from among the two electrical lines on the basis of the voltage detection result of the voltage detection unit, and which generates the trip signal and outputs the trip signal to the trip unit when the electrical line in which the voltage has dropped by a predetermined level or more exists.
H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
H02H 3/17 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass by means of an auxiliary voltage injected into the installation to be protected
G01R 25/04 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents involving adjustment of a phase shifter to produce a predetermined phase difference, e.g. zero difference
The present invention relates to a wireless electric power measuring device (also called a "power tag") attached to low voltage circuit breakers, such as a miniature circuit breaker and an electric leakage circuit breaker, provided in a panel board, so as to measure the quantity of electricity including the voltage, current and electric power of loads connected to the corresponding low voltage circuit breakers, thereby wirelessly transmitting the measured quantity of electricity to a data collecting device provided inside the panel board.
G01R 11/06 - Magnetic circuits of induction meters
G01R 11/04 - HousingsSupporting racksArrangements of terminals
G01R 22/06 - Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
G01R 15/18 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
A contactor assembly is connected to a bus-bar of a main circuit-breaker. The assembly includes a housing including an opening defined therein; a contactor passing through the opening, wherein the contractor includes contacting portions projecting forwardly of the opening and coupled portions projecting rearwardly of the opening; a presser passing through the opening, wherein the presser is interposed between the contactor and the housing, wherein the presser is supported on the housing and presses the contacting portions and the coupled portions; and a connector coupled to the coupled portions of the contactor and electrically connected to the contactor.
The present invention relates to a high speed earthing switch of a gas insulated switchgear and, more specifically, to a high speed earthing switch of a gas insulated switchgear, which includes an air blower so as to secure an improved arc interruption performance. A high speed earthing switch of a gas insulated switchgear according to an embodiment of the present invention comprises: an outer case; a cylinder member installed inside the outer case and having a ventilation hole formed along the lower circumferential surface; and a piston member installed to be inserted into the cylinder member, and moving backward and forward by means of a force transferred from a driving unit so as to inject air inside the cylinder member to a contact part when the cylinder member is opened.
A DC circuit breaker having an arc blowout device according to the present invention comprises: a fixed contact; a movable contact operating so as to make contact with or separate from the fixed contact; an operation part for driving the movable contact; and a blowout device which provides a magnetic field in a direction crossing the arc generated when the movable contact is separated, wherein the blowout device includes: a pair of core plates arranged side by side on both sides of the movable contact and the fixed contact; core rods integrally connected to the core plates, respectively, and having symmetrical shapes to each other; and a blowout coil coupled to one of the core rods.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H01H 9/44 - Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
H01H 33/18 - Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
09 - Scientific and electric apparatus and instruments
Goods & Services
Computers and computer hardware; programmable logic controllers; recorded computer software for the remote control of industrial automation instruments; downloadable and recorded factory automation software, namely, software to integrate manufacturing machine operations, track problems, and generate production reports; electronic apparatus for the remote control of industrial automation instrument operations; integrated circuit modules, namely, data input/output modules for monitoring, operating and controlling industrial automatic instruments; Automatic control mechanisms, namely, electronic automatic control systems for engines except for land vehicles
The purpose of the present invention is to provide a backplane slot device which is economical since a configuration for providing intrinsic information to sub modules is not required and which allows the intrinsic information of the sub modules to be automatically provided so as to minimize the risk of errors occurring when intrinsic information is provided, and the backplane slot device according to the present invention comprises a connector to which a module can be connected and a backplane line connected to the connector, wherein the connector includes a plurality of conductor units, which are connected to a high-potential voltage source or ground of a predetermined voltage so as to automatically provide, as a voltage signal, intrinsic information of a slot to the module when the module is connected to the connector.
A power supply apparatus according to an embodiment of the present invention comprises: a plurality of power modules for receiving alternating current power to provide the power to a load; an uninterruptible supply module installed on one side of the plurality of power modules to supply self-power to the load; an inverter module installed on one side of the plurality of power modules or the uninterruptible supply module to convert the power and provide the converted power to the load; direct current bus bars provided inside enclosures of the plurality of power modules, the uninterruptible supply module, and the inverter module, respectively; and a connection bus bar for connecting adjacent direct current bus bars, wherein in the plurality of power modules and the uninterruptible supply module, an alternating current/direct current converter or a direct current/direct current converter is provided in the upper portion of the direct current bus bar, or the alternating current/direct current converter or the direct current/direct current converter is provided in the lower portion of the direct current bus bar.
H02B 1/20 - Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
The present invention relates to a control program execution method. According to one embodiment of the present invention, the control program execution method performed in a terminal device in which a lower control program for managing a device to be controlled and/or an upper control program for executing the lower control program are installed comprises the steps of: receiving an input of an execution request for the upper control program from a user; searching for the device to be controlled, by the upper control program executed on the basis of the execution request; searching for the lower control program corresponding to identification information of the searched-for device to be controlled, by using the identification information; and connecting communication between the searched-for lower control program and the device to be controlled, wherein the lower control program is sequentially executed after the upper control program is executed.
The present invention relates to a busbar support device comprising: a plurality of lower clamps which support a plurality of busbars at one side and which are disposed in the lengthwise direction of the busbars; a plurality of upper clamps which support the plurality of busbars at the other side and which are disposed in the lengthwise direction of the busbars so as to face the lower clamps; a plurality of fastening members for coupling the upper clamps and the lower clamps to each other; and a plurality of support blocks which are inserted between the upper clamps and the lower clamps and which are disposed between the busbars. According to the present invention, a reinforcing structure for supporting a compressive force applied to clamps is provided such that damage to the clamps can be prevented and busbars can be stably supported.
The present specification relates to a power supply device and a power supply system capable of supplying uninterruptible power, and to a power supply device and a power supply system, which comprise a breaker for controlling a connection in a power bus to which a plurality of power supply devices are connected, and thus the breaker is opened and closed according to various situations occurring in the system so as to control power demand and supply, and thus a UPS function can be performed between the plurality of power supply devices.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
The present specification relates to a power supply system which enables uninterruptible power supply, wherein a circuit breaker is provided to switch on/off each of electric circuits via which a plurality of power supply devices are connected, and thus the UPS function can be performed among the plurality of power supply devices by opening or closing the circuit breaker according to various situations occurring in the system to control power reception and supply.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
The present specification relates to a power supply device and a power supply system capable of uninterrupted power supply, which includes a circuit breaker for regulating connection to a power bus to which a plurality of power supply devices are connected, wherein the circuit breaker is opened or closed according to various situations occurring in the system so as to control power supply and demand.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
The present specification relates to a power supply system enabling uninterruptible power supply, the system including a circuit breaker for regulating respective converters to which a plurality of power supply devices are connected, so as to control a power supply and demand by the opening and closing of the circuit breaker according to various situations occurring in the system, thereby enabling a UPS function to be performed between the plurality of power supply devices.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
The present specification relates to a power supply system capable of supplying uninterruptible power, the system comprising a plurality of circuit breakers for controlling the connections between a plurality of power source modules, to control power demand and supply through opening or closing of the circuit breakers according to various situations occurring in the system, so as to enable a UPS function between the plurality of power source modules.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
The present specification relates to an uninterruptible power supply device, an uninterruptible power supply system and a method for controlling the uninterruptible power supply system, and relates to a power supply device comprising a circuit breaker for switching connection to a power bus, thereby controlling the reception and supply of the power by opening and closing the circuit breaker according to various situations occurring in a system, a power supply system and a method for controlling the power supply system.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
The present specification relates to a power supply device and a power supply system which enable uninterruptible power supply, wherein a circuit breaker is provided in a power bus to which a plurality of power supply devices are connected, so as to switch on/off the connected power supply devices, and thus the UPS function can be performed among the plurality of power supply devices by opening or closing the circuit breaker according to various situations occurring in the system to control power reception and supply.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
A high speed switch comprises an interrupter unit connected to a main circuit and including a movable electrode and a driving electrode for opening or closing the main circuit; a driving unit including a repulsion coil for providing a driving force for moving the movable electrode of the interrupter unit, and a repulsion plate disposed opposite to the repulsion coil; a guide rod part connecting the movable electrode of the interrupter unit to the repulsion plate, having a latch groove formed therein, and reciprocating vertically according to movements of the repulsion plate; and a state-holding unit for regulating the movement of the guide rod part, wherein the state-holding unit comprises: a latch pin; a latch elastic member; and a latch coil.
The present invention relates to a direct current relay and, more particularly, to a direct current relay including a mover assembly having improved support force with respect to a movable contactor. The direct current relay according to an embodiment of the present invention, comprising a pair of fixed contactors and a movable contactor which is moved up and down by an actuator to come into contact with or be separated from the pair of fixed contactors, comprises: a mover support disposed below the movable contactor and connected to the actuator by a shaft; a mover holder disposed above the movable contactor and fixed to the mover support; a contact pressure spring disposed between the movable contactor and the mover support to provide a contact pressure to the movable contactor; and a supporting pin installed to extend through the movable contactor and the mover holder.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
The present invention relates to a direct current relay, and more specifically, to a direct current relay having a movable assembly with improved contact pressure. The direct current relay according to an embodiment of the present invention comprises a pair of fixed contacts, and a movable contact which is moved vertically by an electromagnetic force to contact or be separated from the pair of fixed contacts, wherein an upper yoke and a lower yoke are respectively provided on the upper and lower portions of the movable contact, a contact spring is provided on the lower portion of the lower yoke, and the lower yoke is pressed by the contact spring to move the movable contact.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
The present invention relates to a direct current relay and, more specifically, to a direct current relay having a mover assembly having improved contact pressure. A direct current relay according to an aspect of the present invention, comprising: a pair of fixed contactors and a movable contactor which is moved up and down by an actuator to come into contact with or be separated from the pair of fixed contactors, comprises: a mover support disposed below the movable contactor and connected to the actuator by a shaft; a mover holder disposed above the movable contactor and fixed to the mover support; an upper yoke and a lower yoke disposed above and below the movable contactor to generate an electromagnetic force, respectively; and a contact pressure spring disposed between the lower yoke and the mover support, wherein the upper yoke and the lower yoke form a magnetic path to offset an electron repulsive force generated between the fixed contactors and the movable contactor.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H01H 50/36 - Stationary parts of magnetic circuit, e.g. yoke
The present invention relates to a transformer having a cooling passage that may improve a cooling efficiency, the transformer comprising: an iron core for forming a magnetic circuit; and a winding part having a plurality of conductors, an insulator provided between the conductors, a plurality of unit sections installed outside the iron core, and a cooling passage communicating from the lowermost unit section of the unit sections to the uppermost unit section of the unit sections, and into which insulating oil is introduced, wherein the cooling passage is formed by separating a passage communicating with a part of the unit sections and a passage communicating with the rest of the unit sections.
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION (Republic of Korea)
Inventor
Sim, Jungwook
Jang, Suhyeong
Kang, Sunghee
Song, Woonghyeob
Sul, Seungki
Park, Donghoon
Shin, Dongho
Abstract
The present invention relates to a bidirectional semiconductor circuit breaker. The bidirectional semiconductor circuit breaker according to an embodiment of the present invention comprises: a primary circuit unit which is connected between a power source and a load and in which a first semiconductor switch and a second semiconductor switch are arranged in series; and a snubber circuit unit of which one end is connected to the front end of the first semiconductor switch and the other end is connected to the rear end of the second semiconductor switch, in parallel. In this case, the snubber circuit unit may comprise: a first circuit line in which a first capacitor and a first diode are arranged in series; a second circuit line which is connected in parallel to the first circuit line and in which a second capacitor and a second diode are arranged in series; and a third circuit line of which one end and the other end are connected to the first circuit line and the second circuit line, respectively, and in which a first resistor and a second resistor are arranged in series, and may thus provide a snubber circuit which is applicable to a bidirectional fault current and satisfies semiconductor protection and current restraining performance.
H02H 7/20 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
The present invention relates to a tower-shaped support device comprising: a plurality of main frames arranged in a vertical direction on a mounting surface; a plurality of support frames which are coupled to the main frames in a direction that is vertical with respect to the main frame while the pair of frames facing each other are arranged at the same height, and which support at least one current limiting resistance unit module for limiting the fault current of a power system; and a lower frame and an upper frame respectively provided at the upper and lower sides of the main frame and grounded.
H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
The present invention relates to a modular current limiting resistor comprising: a plurality of resistors which are stacked on one another, wherein the plurality of resistors each comprise a pair of coupling pieces and a conducting line integrally formed with the coupling pieces and having a zigzag shape between the coupling pieces; a pair of support frames which respectively support the stacked resistors, on both sides of the stacked direction; a plurality of coupling members which pass through one of the support frames, pass the coupling pieces, and then are inserted into the resistors through the other one of the support frames so as to fix the resistors; a plurality of conductor rings which are disposed between the plurality of resistors while passing through and being inserted into the coupling members, and which electrically connect the conducting line on each of the resistors; and at least one unit module comprising a plurality of insulating rings which are disposed between the plurality of resistors while passing through and being inserted into the coupling members so as to insulate the resistors.
H01C 7/13 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current-responsive
A photovoltaic system and a control method therefor are disclosed. A photovoltaic system according to an embodiment of the present invention comprises: a solar cell array for converting solar energy into electric power; a power management device for monitoring the power generation amount of the solar cell array and the reverse power from an external power grid; an energy storage device charged by receiving the electric power produced by the solar cell array or the power of the external power grid; and a power control device for supplying, to the energy storage device, the electric power generated by the solar cell array or the power of the external power grid in response to a valid power command, wherein the power management device generates the valid power command which has different values according to whether the reverse power is generated by the external power grid.
The present disclosure relates to an arc extinguishing device of a molded case circuit breaker which includes a fixed contactor fixedly provided on part of a base assembly case; a movable contactor brought into contact with or separated from the fixed contactor; and an arc extinguishing unit configured to extinguish an arc generated when the movable contactor is separated from the fixed contactor, and the arc extinguishing unit including a pair of side plates provided on the base assembly case; and a plurality of grids provided to have a predetermined distance between the pair of side plates, and the grid including a first grid formed with a first cutout portion on a first side surface where an arc is generated; and a second grid formed with a second cutout portion having a depth different from that of the first cutout portion on a second side surface where an arc is generated.
A switching mechanism of a circuit breaker includes a case, a handle rotatably coupled to a side plate fixed to the case, a U-pin coupled to a lower portion of the handle, a lever coupled to the U-pin, and a crossbar disposed in a mounting portion protruding from the case to be perpendicularly movable, the crossbar being moved by receiving contact pressure of the lever, wherein the lever is provided with a contact pressure portion formed in a curved surface on a lower surface thereof, to press the crossbar perpendicularly downward upon closing a circuit.
The present invention relates to an inverter device having an inverter module for converting DC power stored in an energy storage system (ESS) of a photovoltaic power generation system into AC power and supplying the AC power to a load. The inverter device comprises a case, an input/output terminal unit, and a heat dissipating fan. The case has an inverter module housed therein and a plurality of heat dissipating holes formed on the rear surface thereof. The input/output terminal unit is fixed to an upper portion of the front surface of the case through a first fastening member, and a plurality of cables are connected to an inner surface thereof through a second fastening member so as to be energized. The heat dissipating fan is fixed to the front surface of the case while being disposed below the input/output terminal unit, and discharges heat generated by the inverter module.
The present invention relates to an arc extinguishing chamber base of a molded case circuit breaker and, more specifically, to an arc extinguishing chamber base of a molded case circuit breaker, manufactured using a thermoplastic resin. The present invention enables an arc extinguishing chamber base for forming a molded case circuit breaker to be manufactured using an aromatic polyamide-based thermoplastic resin, thereby enabling an increase in productivity, a decrease in component weight, a reduction in component production time, an eco-friendly effect, and recycling. Furthermore, component lifespan increases.
H01H 33/72 - Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
55.
MODULARIZED AUXILIARY CONTACT AND BREAKER INCLUDING SAME
The present invention relates to a modularized auxiliary contact and a breaker including same. A breaker according to an embodiment of the present invention comprises: a fixed contactor and a movable contactor brought into contact with each other or separated from each other so as to allow a current to flow therethrough or so as to cut off a current; a first mover having the movable contactor formed at one side thereof; a second mover connected to the first mover and rotating about a drive shaft; a latch connected at one end thereof to the second mover so as to be rotated according to the rotation of the second mover; an indicator unit connected to the other end of the latch so as to indicate, according to the rotation of the latch, whether the fixed contactor is brought into contact with the movable contactor; and a counter connected to the other end of the latch so as to count, according to the rotation of the latch, at least one of the number of times when the fixed contactor is brought into contact with the movable contactor and the number of times when the fixed contactor is separated from the movable contactor.
The present invention relates to an arc ventilation system of a multi-stage distributing board, and more particularly, to an arc ventilation system of a multi-stage distributing board having an arc ventilation detour path, capable of preventing an arc generated in a lower compartment from damaging an upper compartment. The arc ventilation system of a multi-stage distributing board according to an embodiment of the present invention includes a first compartment provided at a first stage of an enclosure of the distributing board, a second compartment provided at a second stage located above the first stage, a side arc ventilation compartment provided at one side of the first compartment and the second compartment, and a middle arc induction compartment provided between the first compartment and the second compartment and communicating with the side arc ventilation compartment.
09 - Scientific and electric apparatus and instruments
35 - Advertising and business services
39 - Transport, packaging, storage and travel services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Downloadable and recorded computer software and programs for optimally managing, operating, and forecasting energy for buildings such as electric power, heat, and gas; Factory automation control machines and instruments, namely, industrial automation controls; Electricity transformers; Distributed Control Systems (DCS) comprised primarily of industrial automation controls, downloadable and recorded industrial process control software; Downloadable and recorded computer software and programs for acquisition of data for energy consumption; Downloadable and recorded computer software and programs for optimal control of energy consumption; Remote electric meter reading machines and instruments, namely, electric meters and communication modules for measuring electric energy consumption from a remote location; Remote controlled telemetering machines and apparatuses; Electricity inverters; Electric power monitoring and controlling machines and instruments, namely, electronic monitors and monitor modules for monitoring electric current and electric signals; Electricity meters; Electric power converters; Downloadable and recorded computer software and programs for managing electric power loads; Electric power storage devices, namely, rechargeable batteries; Supervisory Control And Data Acquisition Systems (SCADA) comprised primarily of industrial automation controls, downloadable and recorded industrial process control; Machines and instruments for controlling maximum electric power demands, namely, electronic controllers used to reduce power consumption; Computers; Control devices for electricity accumulated by electric power systems, solar power, and wind power; Programmable Logic Controllers (PLC); Circuit closers; Downloadable and recorded computer software and programs for the maintenance of systems for conserving energy for buildings such as electric power, heat, and gas; Downloadable and recorded computer software and programs for controlling and maintaining optimal production of energy such as electric power, heat, and gas; Downloadable and recorded computer software and programs for systems relating to comprehensive protection, control, and operation of electric power; Downloadable and recorded computer software and programs for managing and operating electric power storage devices; Downloadable and recorded computer software and programs for monitoring and controlling electric power systems Professional consulting services relating to efficiency of energy for buildings including electric power, heat, and gas; Advisory services relating to efficiency of energy such as electric power, heat, and gas Utility services, namely, electric power grid load shifting Measurement of environments within buildings, namely, measurement and verification of carbon dioxide and other greenhouse gas emission offsets; Remote monitoring of building installations, namely, generators, heating, air-conditioning, and ventilation apparatuses; Maintenance of computer software systems for conserving energy for buildings including electric power, heat, and gas; Development of software for use in optimally managing, operating and forecasting energy for buildings; Development of data processing programs by order of third parties; Diagnostic services in the field of systems for conserving energy for buildings such as electric power, heat, and gas; Development of computer software systems relating to acquisition of data of energy consumption and optimal control of energy such as electric power, heat, and gas; Remote electric, heat, and gas meter reading services; Monitoring of computer systems by remote access to ensure proper functioning; Development of software for systems relating to comprehensive protection, control, and operation of electric power; Quality control for others in the field of electric power; Maintenance of computer software
58.
Device for protecting inverter using a buffer operating according to a state of a safety relay
A device for protecting an inverter include a first power switch configured to be turned on when a first voltage signal from a first switch of a safety relay is applied thereto; a second power switch connected in series with the first power switch, wherein the second power switch is configured to be turned on when a second voltage signal from a second switch of a safety relay is applied thereto; and a power line for connecting the first power switch and the second power switch to each other in series and for connecting the series of the first power switch and the second power switch to a buffer of the inverter, wherein a third voltage signal is applied via the power line to the buffer.
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
59.
Inverter controlling device maximizing output voltage of inverter in overmodulation period
The inverter includes an inverting module including a plurality of switching elements, wherein the inverting module are configured for receiving a direct current (DC) stage voltage and for generating an output voltage of three-phases via switching of the switching elements. The device includes: a command voltage outputting unit configured for providing a pulse width modulation (PWM) control signal corresponding to an initial command voltage to the switching elements of the inverting module when the initial command voltage is within a voltage limit; a modulation index modifying unit configured for modifying a modulation index of the initial command voltage when the initial command voltage is outside the voltage limit; and an overmodulated command voltage generation unit configured for modifying the initial command voltage using the modified modulation index to form a modified command voltage and for limiting the modified command voltage to the voltage limit to generate an overmodulated command voltage.
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
Disclosed is a device for controlling an inverter. The device achieves a minimum switching loss in a discontinuous modulation duration regardless of a power factor. The device includes: a command voltage transform unit configured for transforming each of 3 phases command voltages into each of pole command voltages using the DC stage voltage, a pulse width modulation index, a discontinuous modulation angle corresponding to a discontinuous modulation duration, and each phase difference between each of the 3 phase command voltages and each of 3 phases output currents of the inverting module; and a controller configured for generating a control signal based on a comparison between each pole command voltage and a triangular carrier wave, wherein the control signal controls upper and lower switching elements of each phase leg.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02P 21/22 - Current control, e.g. using a current control loop
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
KOREA ELECTRO TECHNOLOGY RESEARCH INSTITUTE (Republic of Korea)
LSIS CO., LTD. (Republic of Korea)
Inventor
Lee, Woo Young
Park, Hae Yong
Lee, Gyeong Ho
Park, Sang Hun
Bae, Chae Yoon
Sim, Jung Wook
Jang, Hyun Jae
Abstract
The DC interrupting device includes a main current conduction unit including a main interrupting switch, which is a mechanical switch, a reverse current power supply unit connected to an input terminal of the main current conduction unit and configured to generate a predetermined reverse current, and a reverse current conduction unit configured to supply the reverse current to an output terminal of the main current conduction unit. The reverse current power supply unit includes a first reverse current dedicated capacitor charged by a voltage applied to an input terminal of the main current conduction unit, a polarity reversing inductor configured to reverse a polarity of the first reverse current dedicated capacitor, and a reverse current power supply unit switch configured to perform circuit connection such that the polarity reversing inductor reverses the polarity of the first reverse current dedicated capacitor.
H01H 33/00 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
62.
Relay-welding detection device and detection method
The objective of the present invention is to provide a relay-welding detection device and method, the device and method capable of determining, whether a relay is welded, by using an analog-digital converter (ADC). Another relay-welding detection device according to the present invention comprises: a first ADC for measuring a voltage of a relay input terminal; a second ADC for measuring a voltage of a relay output terminal; and a CPU for comparing the voltage of the relay input terminal with the voltage of the relay output terminal and determining whether the relay is welded.
Disclosed herein is a pole component assembly for a circuit breaker. The pole component assembly for a circuit breaker includes an external insulating housing made by injecting resin into a housing mold, applying injection pressure to mold the injected resin, and separating the molded resin from the housing mold, and a circuit breaker portion assembly detachably inserted into the external insulating housing after the external insulating housing is made. According to embodiments of the present disclosure, the external insulating housing is molded without a main circuit breaker component when manufacturing a sealed type pole component, and the main circuit breaker component is assembled into the finished external insulating housing, thereby preventing the main circuit breaker component from being contaminated or damaged.
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
The present invention relates to a device for protecting a power semiconductor element inside a power conversion device receiving a DC input, by using a current limiting DC-fuse and a surge absorber (SA). A device for protecting a DC power conversion semiconductor element by using a current limiting DC-fuse and a surge absorber comprises: a DC fuse for disconnecting a converter when overcurrent caused by a high voltage DC power occurs between electrical devices; a power conversion device for converting input DC power to AC power and providing the converted AC power to a system or a load; and a surge absorber (SA) for absorbing overvoltage (surge voltage) instantaneously generated at a time of fusing the DC fuse between the DC fuse and the power conversion device.
A power management system is disclosed. The power management system according to one embodiment of the present invention comprises: a battery storage system comprising a lithium ion battery; a charge control unit for controlling input or output of energy of the battery storage system; and a system control unit for performing leveling schedule control on the basis of information about the battery storage system and the information about the charge control unit, wherein the leveling schedule control comprises the steps of: checking an operation state of each module; determining a schedule performance in the power management system; managing distribution; and outputting instructions according to the managing distribution.
Disclosed are a self-power relay and a method for preventing a malfunction thereof. A self-power relay of the present invention comprises: a self-power generation unit for autonomously generating a driving power by performing conversion into a preconfigured driving power level by using, as a source power, a system power of a transmission/distribution line or power system; and a relay operation unit operated by a driving power, for measuring the amount of a system power of a transmission/distribution line or power system, blocking a system power transmitted to a load when a failure occurs, and monitoring a change in a source power of the self-power generation unit in real time, so as to stop a relay operation of the self-power generation unit and a relay operation of the relay operation unit itself when abnormality occurs, wherein a malfunction can be prevented by checking an unstable state of a source current and voltage for generation of a self driving power.
A DC circuit breaker, according to the present invention, may comprise: an enclosure which forms the exterior; a stator which has a fixed contact and is installed on one side of the enclosure; a mover which is installed inside the enclosure so as to face the stator, and has a movable contact selectively making contact with the fixed contact, thereby being electrically connected therewith; a closing device which is installed at one side of the enclosure so as to be adjacent to the mover, and temporarily fixes the mover so as to enable the movable contact to make contact with the fixed contact by a closing force inputted from outside; an overcurrent trip device which is installed inside the enclosure so as to face the closing device, and trips when an abnormal current occurs by automatically separating the mover from the stator; and a manual trip mechanism which, when tripping is required other than when the abnormal current occurs, separates the trip device from the mover by applying an external force from outside of the enclosure.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H01H 71/12 - Automatic release mechanisms with or without manual release
The present invention relates to a method of optimally controlling a DC-DC converter, which allows a status of health (SOH) that enables an energy storage system (ESS) or a battery to be used for a long time, through an optimal charging/discharging switching control on the basis of an estimated state of charge (SOC) obtained through estimation of the SOC of the ESS. The method of optimally controlling a DC-DC converter of the present invention comprises the steps of: (A) estimating states of charge (SOC) of an ESS and a battery pack by a control unit; (B) controlling a first switching element (M1) and a second switching element (M2) of a DC-DC converter so that an objective function is optimized on the basis of the estimated SOC obtained through the estimation of the SOC by the control unit; and (C) charging/discharging the ESS and the battery pack by controlling an output voltage of the DC-DC converter while maintaining the SOC at a predetermined reference value by the control unit.
H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
The present disclosure relates to a protective relay. According to the present disclosure, the handle is fixed or separated by a lever structure rather than a gear structure, so that the user may easily fix or separate the handle to or from the outer casing. Therefore, convenience and operability of the user are improved.
The present disclosure relates to a molded case circuit breaker, and more particularly, to a contact unit of a molded case circuit breaker. A molded case circuit breaker according to an embodiment of the present disclosure may include a fixed contact; a movable contact rotatably provided on a shaft body to be brought into contact with or separated from the fixed contact; and an insulating barrier that enters between the fixed contact and the movable contact during interruption, wherein the insulating barrier is coupled to the movable contact to rotate along a circumferential surface of a shaft body.
There is provided a method for controlling a motor in an elevator system. In this method, a time duration to a time-point at which a car stops is determined using an actual speed of the motor and a predetermined travel distance. Then, a leveling error is adjusted based on the determined time duration.
B66B 1/30 - Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear
B66B 1/50 - Adaptations of switches or switchgear with operating or control mechanisms mounted in the car or cage or in the lift well or hoistway
B66B 1/34 - Control systems of elevators in general Details
G01P 3/54 - Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring frequency of generated current or voltage
72.
Device for detecting phase loss of output in inverter
Disclosed is a device for detecting a phase loss in an output current in an inverter. The device includes: an output current detection unit for detecting two phases output currents from two signals output from two shunt-resistors connected to two phases legs respectively; an output current calculation unit for calculating an output current of one remaining phase using the detected two phases output currents; and an output phase loss detection unit configured for detecting an output phase loss when the calculated output current is within a current band corresponding to the output phase loss or when the calculated output current has a magnitude equal to and a sign opposite to one of the detected two phases output currents.
The present invention relates to a method for controlling an inverter to prevent an unnecessary fan trip. The method includes: receiving a fan current; when the fan current is above a high trip level or is below a low trip level, incrementing an error count; when the error count reaches an error count maximum value, incrementing a trip count and initializing the error count; and when the trip count reaches a trip count maximum value, generating a fan trip signal.
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
G05F 1/573 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
74.
Directional over-current ground relay (DOCGR) using sampled value and method for operating the DOCGR
The present disclosure relates to a directional over-current ground relay (DOCGR) for performing a protective relay of the power source system such as a micro-grid system using communications between an SV-remote terminal unit (SV-RTU) and the DOCGR, wherein the SV-RTU is configured for measuring voltage and current of the distributed power source system and thus generating a sampled value (SV) signal. Further, the present disclosure relates to a method for operating the DOCGR.
H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
H02H 1/00 - Details of emergency protective circuit arrangements
The present disclosure relates to a motor-driving device with an improved structure of a circuit module. According to the present disclosure, the boards are coupled to each other via a connector or a bolt. This removes wires use, and reduces an assembly tolerance, thereby to improve the device productivity.
H01R 12/00 - Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocksCoupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structuresTerminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
The present disclosure provides a device for processing a programmable logic controller (PLC) program. In one embodiment, the device includes a storage containing PLC programs stored on a block basis, and a program block table defining storage locations of the PLC programs; and a controller configured: when a PLC program is modified during a PLC is operating, to determine a start address of a storage location where the modified PLC program is to be stored with referring to a block number of the modified PLC program, size information of the modified PLC program, and the program block table; and to store the modified PLC program in the storage based on the determined start address. According to the present disclosure, multiple users may simultaneously access a PLC and then may simultaneously modify PLC programs during the PLC is operating.
A circuit breaker control module is disclosed. The circuit breaker control module of the present invention comprises: a plurality of semiconductor switching units for blocking current flows of transmission distribution lines or performing switching operations so as to switch the current flow directions; a control unit for controlling the turn-on/turn-off operation of each semiconductor switching unit by transmitting a trip signal to each of the plurality of semiconductor switching units; and a plurality of insulation type signal transmission element units which are provided between the plurality of semiconductor switching units and the control unit such that the semiconductor switching units and the control unit are insulated, and which transmit the trip signal from the control unit to each of the plurality of semiconductor switching units, and thus the present invention can reduce the risk of accidents due to an electrical arc and increase the stability and reliability of the control unit.
H02H 1/00 - Details of emergency protective circuit arrangements
H03K 17/567 - Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
78.
Position control device based on programmable logic controller
The present disclosure provides a device for controlling a position based on a programmable logic controller (PLC), the device comprising: a motor driving module; an input module; and a control module, wherein the control module includes: a profile creation unit configured for creating the position profile based on the position command when a first position calculation interrupt is generated in a first position control period; a pulse calculation unit configured for calculating a number of outputs of the driving pulse to be output in a second position control period following the first position control period based on the position profile; and a driving controller configured for outputting the driving pulse having the number of outputs calculated by the pulse calculation unit to the motor driving module when a second position calculation interrupt notifying a start time-point of the second position control period is generated.
A motor-driving device for varying power supplied from an external power source and supplying the varied power to a motor includes a lower base; a middle base disposed above the lower base; a cooling fan disposed between the lower base and the middle base; a connector disposed on the middle base, where the connector is electrically connected to the cooling fan; and a substrate disposed above the middle base, wherein the connector is disposed between the substrate and the middle base, wherein the connector is electrically connected to the substrate.
The present invention provides a power distribution system comprising a current sensing unit which senses an electric current supplied to a power distribution line, a disconnect switch which disconnects the electric current being supplied to the power distribution line, and an intelligent electronic device (IED) which, when a plurality of sensing signals sensing the electric current from a current sensing module are inputted, determines a main sensing signal from the plurality of sensing signals according to set priorities, and confirms the current state of the electric current according to the main sensing signal, thereby controlling the operation of a disconnect switch module.
G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
The present invention relates to a transformer sensor mounting device, which is a device for mounting a transformer sensor inside a transformer, comprising: a first member for accommodating a part of the sensor; and a second member which is coupled to the first member and accommodates the remaining part of the sensor exposed to the outside of the first member. By having a sensor mounting device formed of an insulating material and accommodating the long length of a sensor, the present invention can prevent damage of the sensor and can block the influence on the electric field distribution inside a transformer, thereby securing the installation stability of the sensor and the reliability of the transformer.
A switchboard monitoring system, according to one embodiment of the present specification, comprises: a thermal imaging apparatus for acquiring thermal imaging information of a device provided in a switchboard panel; and a control apparatus for receiving the thermal imaging information from the thermal imaging apparatus, generating temperature information of the device on the basis of the received thermal imaging information, and detecting the temperature state of the device on the basis of the generated temperature information.
A switching module may include a plurality of cooling plates stacked along a vertical direction, a switch disposed between the cooling plates, a first supporting member disposed below the lowermost cooling plate, a second supporting member disposed above the uppermost cooling plate, first and second pressing support portions disposed between the lowermost cooling plate and the first supporting member, and a pressing member disposed between the uppermost cooling plate and the second supporting member.
H05K 7/12 - Resilient or clamping means for holding component to structure
H01L 29/74 - Thyristor-type devices, e.g. having four-zone regenerative action
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H01L 23/40 - Mountings or securing means for detachable cooling or heating arrangements
H01L 21/50 - Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the groups or
H05K 7/14 - Mounting supporting structure in casing or on frame or rack
H01L 25/00 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices
H01L 25/11 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass
84.
Switch assembly of reactive power compensation apparatus
Each of the first and second switching modules may include first through (n+1)th cooling plates stacked along a vertical direction with respect to the support module; first through nth switches respectively disposed between the first through (n+1)th cooling plates; a first electrode plate disposed on the (n+1)th cooling plate; a first supporting member disposed on the first electrode plate; a first pressing member disposed between the first electrode plate and the first supporting member; a second electrode plate disposed below the first cooling plate; a second supporting member disposed below the second electrode plate; and a second pressing member disposed between the second electrode plate and the second supporting member.
H01L 29/74 - Thyristor-type devices, e.g. having four-zone regenerative action
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
H01L 23/40 - Mountings or securing means for detachable cooling or heating arrangements
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H01L 25/11 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass
Disclosed is a device for detecting an instantaneous maximum output current of an inverting module as a peak-current thereof. The inverting module converts a direct current (DC) link voltage to an alternate current (AC) voltage, and includes three-phases legs. Each leg has lower and upper switching elements connected in series. The device includes a shunt resistor serially connected to a lower switching element of each leg of the inverting module; a current detection module configured for detecting an output current from a signal output from each shunt resistor; and a summer configured for receiving and summing the detected output currents from the current detection module and outputting the instantaneous maximum output current of the inverting module as the peak-current thereof.
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
H02M 5/458 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 1/32 - Means for protecting converters other than by automatic disconnection
The present specification relates to a controller data linkage system. A data linkage system according to one embodiment of the present specification comprises: a main editing module for generating a data linkage project; a sub-editing module for converting SCADA system information on a SCADA system into a common application programming interface (API) through API wrapping, and delivering the common API to the main editing module; a main runtime module for performing a server function for data linkage between the SCADA system and a client; and a sub-runtime module for delivering a tag value and state information of the SCADA system to the main runtime module through a shared memory.
G05B 19/4093 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
G06F 9/44 - Arrangements for executing specific programs
A method of assembling a switching module may arrange a first pressing member on a first supporting member, stack a plurality of switches and a plurality of cooling plates on the first pressing member along a vertical direction, arrange a second pressing member and a supporting member on the uppermost cooling plate, support the first supporting member and a second supporting member using a plurality of supporting rods, press the first pressing member using a pressing device to separate between the first pressing member and the first supporting member, and insert a third pressing member between the first pressing member and the first supporting member.
H01L 23/427 - Cooling by change of state, e.g. use of heat pipes
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H02B 3/00 - Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H01L 23/40 - Mountings or securing means for detachable cooling or heating arrangements
H05K 7/14 - Mounting supporting structure in casing or on frame or rack
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
H01L 21/50 - Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the groups or
H01L 25/11 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass
88.
Switch assembly of reactive power compensation apparatus
A switch assembly of a reactive power compensation apparatus may include a first switching module having a first stack structure perpendicular to a supporting module, and a second switching module having a second stack structure perpendicular to the supporting module, the second switching module being connected in parallel with the first switching module. Each of the first and second switching modules may include a plurality of cooling plates stacked along a vertical direction with respect to the supporting module, and a plurality of switches disposed between the plurality of cooling plates. The cooling plate may include an engagement portion disposed on one side of the upper surface to be located at a normal position by guiding the switch.
G05F 1/70 - Regulating power factorRegulating reactive current or power
H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
H03K 17/14 - Modifications for compensating variations of physical values, e.g. of temperature
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
H01L 23/40 - Mountings or securing means for detachable cooling or heating arrangements
H01L 25/11 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass
89.
Switch assembly of reactive power compensation apparatus
A switch assembly of a reactive power compensation apparatus may include a first switching module having a first stack structure perpendicular to a supporting module, a second switching module having a second stack structure perpendicular to the supporting module, the second switching module being connected in parallel with the first switching module, and first and second supporting members disposed above and below the first and second switching modules.
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
H01L 23/40 - Mountings or securing means for detachable cooling or heating arrangements
H01L 25/11 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass
90.
Reactive power compensator, discharging system, and operating method of the discharging system
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
G05F 1/70 - Regulating power factorRegulating reactive current or power
The objective of the present invention is to provide an earth leakage circuit breaker which is capable of reliably detecting a leakage current of an alternating current component in a circuit as well as a leakage current of a pulsating direct current component and capable of blocking the circuit in response to the leakage current. The earth leakage circuit breaker according to the present invention comprises: a leakage current detection unit for outputting a leakage current detection signal according to the leakage current from a circuit; a conversion unit for outputting the leakage current magnitude of a fundamental wave component, a ratio of a third harmonic component, and a ratio of a positive pole peak current value to a negative pole peak current value, on the basis of the leakage current detection signal outputted from the current detection unit; and a control unit for comparing the leakage current magnitude of a fundamental wave component, the ratio of a third harmonic component, and the ratio of a positive pole peak current value to a negative pole peak current value, outputted by the conversion unit, with predetermined reference values to determine whether or not a leakage current of the alternating current component is generated or a leakage current of the direct current component is generated and to thereby output a trip control signal when it is determined that the leakage current of the direct current or alternating current component is generated.
H01H 83/02 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
92.
SYSTEM FOR MANAGING CIRCUIT BREAKER IN DISTRIBUTION SWITCHBOARD
A system for managing a circuit breaker in a distribution switchboard according to an embodiment of the present invention comprises: a vibration detection sensor provided in a distribution switchboard panel; and a control apparatus for performing a first test for checking whether a switch of each of the circuit breakers operates, on the basis of a first test request of circuit breakers included in the distribution switchboard panel and vibration detection data acquired using the vibration detection sensor, wherein the control apparatus: receives the first test request of the circuit breakers included in the distribution switchboard panel; controls the switches of the respective circuit breakers to sequentially operate, in response to the received first test request; acquires vibration detection data by using the vibration detection sensor whenever the switch of each of the circuit breakers operates; and performs the first test on the basis of the acquired vibration detection data.
A submodule according to the present invention includes a power pack including a plurality of switching modules, first and second input busbars connected to the plurality of switching modules and protruding to a first outer side of the power pack, first and second connection busbars connected to the plurality of switching modules and protruding to a second outer side of the power pack, a capacitor pack including a capacitor element, and first and second connection units provided at both sides of one surface of the capacitor pack. The first and second connection busbars are inserted into the first and second connection units, respectively, such that the power pack and the capacitor pack are electrically connected to each other.
The present disclosure relates to an initial charging system for a medium-voltage inverter and a method for controlling the system. The initial charging system comprises: a first switch for switching between a medium-voltage inverter and a power supply thereto; a second switch for switching between an output stage of the medium-voltage inverter and an electric motor; a first initial charging unit disposed between and connected to the first switch and the medium-voltage inverter for limiting an initial excitation current to be applied to the phase-shift transformer; and a second initial charging unit disposed between and connected to an input stage of each power cell and the direct current (DC) link capacitor for limiting an initial charging current in the direct current (DC) link capacitor.
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
H02P 25/22 - Multiple windingsWindings for more than three phases
H02P 3/22 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor by short-circuit or resistive braking
H02M 5/458 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
H02M 1/40 - Means for preventing magnetic saturation
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
H02M 1/36 - Means for starting or stopping converters
H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
A switchboard management system according to an embodiment of the present invention comprises: at least one gateway connected to at least one from among a plurality of circuit breakers in a switchboard panel; and a server connected to the at least one gateway, wherein the at least one gateway comprises an environment sensing unit for acquiring environment data on the at least one circuit breaker connected thereto, and the server receives, from the at least one gateway, driving information on the plurality of circuit breakers and the environment data and predicts the remaining lifespan of each of the plurality of circuit breakers on the basis of the received driving information and environment data.
A system for managing a circuit breaker in a distribution switchboard according to the present invention comprises a detection sensor and a control apparatus. The detection sensor detects a vibration of a switch included in the circuit breaker. Also, the control apparatus transmits, to the circuit breaker, a control signal for control of the switch. Further, the control apparatus detects a possibility of deviation of the circuit breaker or a non-operation of the switch, on the basis of a detection waveform which is a waveform of the vibration detected by the detection sensor for vibration detection.
A system for providing location information of switchboard panels, according to an embodiment of the present invention, comprises: at least one gateway provided in at least one switchboard panel installed in a building; a data logger which is connected to the at least one gateway; and a server which is connected to the data logger, wherein the at least one gateway acquires location detection data of each of the at least one switchboard panels and transmits the acquired location detection data to the server via the data logger, and the server creates location information of each of the at least one switchboard panels on the basis of the location detection data.
The present invention relates to a circuit breaker opening/closing assistance apparatus for correcting a thermal image of a circuit breaker on the basis of a visible image of the circuit breaker, and assisting an opening/closing operation of the relevant circuit breaker on the basis of a temperature identified through the corrected thermal image. Further, the present invention relates to a circuit breaker opening/closing assistance apparatus for identifying a temperature of a circuit breaker in which a failure has occurred, on the basis of a thermal image of the circuit breaker, and assisting an opening/closing operation of the relevant circuit breaker on the basis of the identified temperature.
The present invention provides a protection assistance device of multiple circuit breakers in a low-voltage system, in which protection assistance in both directions from the upper side to the lower side or from the lower side to the upper side is possible, and the number of wires for protection assistance between multiple upper/lower circuit breakers can be minimized. A protection assistance device according to the present invention comprises: at least one upper low-voltage circuit breaker which has a communication unit and is connected to a first branch circuit between an upper most power circuit and an upper power circuit; at least one middle low-voltage circuit breaker which has a communication unit and is connected to a second branch circuit between an upper power circuit and a lower power circuit; at least one lower low-voltage circuit breaker which has a communication unit and is connected to a third branch circuit between a lower power circuit and a lowermost power circuit; and a communication line which makes a communication connection between the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker, wherein the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker comprise a control unit for, when a trip operation of automatically breaking a circuit due to abnormal current occurrence in a connected branch circuit is performed, transmitting a communication packet for reporting a trip operation state to at least one predetermined circuit breaker among the circuit breakers through the communication line.
H02H 3/05 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with means for increasing reliability, e.g. redundancy arrangements
H02H 1/00 - Details of emergency protective circuit arrangements
100.
EARTH LEAKAGE BREAKER AND ARC DETECTION APPARATUS ATTACHABLE/DETACHABLE TO/FROM SAME EARTH LEAKAGE BREAKER
The present invention relates to an earth leakage breaker and an arc detection apparatus and, more specifically, to an earth leakage breaker and an arc detection apparatus attachable/detachable to/from the earth leakage breaker. An earth leakage breaker and an arc detection apparatus according to one embodiment of the present invention comprise: a body of the earth leakage breaker; and an arc detection module attachably/detachably coupled to the body of the earth leakage breaker so as to detect an arc current, wherein the arc detection module comprises: an arc detection unit connected to a first load-side terminal of the body of the earth leakage breaker so as to detect an arc current flowing through a line; a control unit for determining an arc current on the basis of an arc detection signal delivered by the arc detection unit; and an output unit for outputting a signal or a current, according to a control signal of the control unit.
H02H 1/00 - Details of emergency protective circuit arrangements
H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
H01H 83/02 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
