KR20180029555A - System for remotely controlling of circuit breaker - Google Patents

Abstract

Disclosed is a remote monitoring control system of a circuit breaker, which rotates a lever provided in a wiring circuit breaker to an initial position through an automatic recovery device when the degree of a risk is low by analyzing the cause of an electrical shock which has operated the wiring circuit breaker. To this end, the remote monitoring control system of a circuit breaker comprises: a distribution board including a circuit breaker, an automatic recovery device for recovering a lever of the circuit breaker, a monitoring device for monitoring a state of a machine installed in the distribution board to generate monitoring data, and a control device for generating a cut-off signal, collecting the monitoring data from the monitoring device to transmit the same to the outside, and receiving a circuit breaker recovery signal from the outside to control an operation of the automatic recovery device; and a management server for receiving the cut-off signal and the monitoring data from the distribution board to analyze a state of the distribution board, and generating and transmitting the circuit breaker recovery signal for a circuit breaker which requires cut-off recovery. According to the present invention, when a trip occurs in a circuit breaker, the cause of the trip is analyzed, and a lever of the circuit breaker can be recovered to an initial state (on-state) from a remote place when the circuit breaker is in a normal state such as a temporary overload or the like.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring and control system for a breaker,

The present invention relates to a remote monitoring and control system for a circuit breaker that monitors and controls a circuit breaker remotely. More particularly, the present invention relates to a remote monitoring and control system for a circuit breaker, To a remote monitoring control system of a circuit breaker which rotates the circuit breaker to an initial position through the apparatus.

In general, a molded case circuit breaker (MCCB) is installed in a switchboard in a power distribution system of a plant or a building, and serves as an opening / closing device for supplying or blocking power to the load side in a no-load state. If a large current exceeding the load current flows due to an abnormality in the load converter during the use of the load, it acts as a circuit breaker to cut off the power supplied from the power source side to the load side in order to protect the electric wire and the load side device of the converter.

Such a circuit breaker is a circuit breaker that also serves as an overload and a short circuit protection and is housed in a molded case. The circuit breaker is compact, safe in operation, and does not have a trouble to insert a fuse. Instead of combining a conventional knife switch and a fuse, It is a used product

In general, a circuit breaker for wiring has one movable contact and fixed contact in one enclosure for each pole, one opening / closing mechanism for opening and closing the movable contact, a large fault current such as over current or short circuit current on the circuit, A trip mechanism for triggering the opening / closing mechanism to open the circuit (also referred to as a trip), a circuit for canceling an arc generated between the contacts of the movable contact and the stationary contact when the circuit is opened Of the present invention.

The circuit breaker has a structure in which a lever attached to the front of the circuit breaker can be grasped by hand to open or close the circuit breaker. When a fault current due to an overcurrent or a ground fault occurs, the lever of the circuit breaker is turned ON (TRIP) position, which is the middle of the OFF position (OFF position), and the current is automatically shut off. To re-enter the lever, the person manually pushes the lever to the shutoff position and then, So that the worker must move to the position where the breaker is installed and raise the lever of the breaker to the input position after the failure recovery, resulting in waste of time and manpower.

In addition, in the temporary temporary distribution panel used in the construction site where the secondary load capacity of the circuit breaker is not designed to meet the capacity of the circuit breaker and the load is increased or decreased from time to time, the circuit breaker is automatically tripped from time to time due to instantaneous overload In the streetlight distribution panel, instantaneous ground fault occurs due to rainfall. However, if the weather is clear, the ground fault point is automatically restored. Even if the ground fault is temporarily unknown, the circuit breaker is operated. It is often necessary to move the handle of the breaker by directly moving to the site.

Korean Patent No. 10-1587437 (published on January 21, 2016) Korean Patent Publication No. 10-2009-0020219 (Published Feb. 26, 2009) Korean Utility Model Registration No. 20-0148679 (published on June 15, 1999)

Accordingly, it is an object of the present invention to provide a circuit breaker capable of quickly returning a field manager to the field when the cause of the electric shock of the breaker is analyzed and the lever of the breaker is analyzed in a steady state, And to provide a remote monitoring and control system.

In order to accomplish the object of the present invention, in one embodiment of the present invention, a circuit breaker for detecting the occurrence of an overload or a short circuit in the switchboard circuit to cut off power supply, and a lever A monitoring device for monitoring the state of a machine mechanism installed in the switchboard and receiving power to generate monitoring data; and a controller for detecting a power supply cutoff by the breaker to generate a shutoff signal And a control device for collecting surveillance data from the surveillance device, transmitting the surveillance signal and surveillance data to the outside, receiving a breaker restoration signal from the outside, and controlling the operation of the automatic restoration device, and a plurality of switchboards Connected to the communication network via the communication network, And a management server for analyzing the status of each of the switchboards to generate a breaker restoration signal for the breaker requiring interruption restoration and transmitting the breaker restoration signal to the switchboard.

According to the present invention, when a trip occurs in the breaker, the cause of the trip can be analyzed and the lever of the breaker can be restored to the initial state (ON) in a normal state such as temporary overload, no need.

Further, since the present invention can confirm the operation state of the breaker even at a remote place, it is possible to monitor the switchboard having the breaker with a minimum of manpower.

In addition, since the arc ejected from the circuit breaker can be flowed in and removed by the present invention, the damage of the mechanical mechanism due to the remaining arc can be minimized.

1 is a block diagram illustrating a remote monitoring and control system for a circuit breaker according to the present invention.
2 is a perspective view showing an embodiment of an arc removing apparatus according to the present invention.
3 is a cross-sectional view of the arc removing device cut along the line AA in Fig.
4 is a perspective view for explaining another embodiment of the arc removing apparatus according to the present invention.
5 is a perspective view illustrating a circuit breaker equipped with the automatic restoration apparatus according to the present invention.
6 is an exploded perspective view for explaining an automatic restoration apparatus according to the present invention.
7 is a block diagram illustrating a management server according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a remote monitoring and control system for a circuit breaker according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

 1 is a block diagram illustrating a remote monitoring and control system for a circuit breaker according to the present invention.

1, a remote monitoring and control system for a circuit breaker according to the present invention includes an electrical switchboard 100 having a circuit breaker 110 connected to the switchboard 100, And returns the breaker lever to the initial position (ON). Such a communication network may be a WiFi, a Longe Term Evolution (LTE), a Code Division Multiple Access (CDMA), an Ethernet, a power line communicaton, a CAN (CAN), an RS- , ZigBee, and the like.

Hereinafter, each component will be described in more detail with reference to the drawings.

Referring to FIG. 1, a remote monitoring and control system for a circuit breaker according to the present invention includes a switchboard 100.

The switchboard 100 is a device for uniformly controlling switches, relays, gauges, and the like (hereinafter, referred to as "mechanical devices") for operation or control in a power plant, a substation, It provides the function to manipulate, control and monitor the special high voltage electricity supplied from KEPCO to convert it to the low voltage and rated capacity according to the ratings of various facilities and equipments in practical use so that the electric facilities can be used safely.

1, the switchboard 100 includes a circuit breaker 110, an automatic restoration device 120, a monitoring device 130, and a control device 140. The switchboard 110 selectively connects the case, the door, the door lock, Memory. ≪ / RTI >

The case is configured to accommodate a mechanical device for distributing electric power, and an opening is formed.

The circuit breaker 110 is connected to the machine mechanism and detects the occurrence of an overload or a short circuit in the circuit board 100 to shut off the power supply to the machine mechanism. The circuit breaker 110 may be a thermal-type circuit breaker, Can be used.

If desired, the breaker 110 may be provided with an arc cooling device 150 for cooling and reducing an arc blown from the breaker housing during a short circuit.

More specifically, the arc cooling apparatus 150 is coupled to one side of the breaker housing through which arc is discharged so as to introduce an arc ejected from the breaker 110. The arc cooling apparatus 150 includes an arc inlet hole 153 on a side facing the breaker housing and an arc discharge hole 152 through which the arc passes. At this time, one or more arc inflow holes 153 and arc discharge holes 152 may be provided.

In a specific aspect, the arc cooling apparatus 150 according to the present invention is inserted into the breaker housing to be plug-in and fixed. For example, when the arc cooling apparatus 150 is plugged into the breaker housing and then the bolts are inserted into the bolt holes formed in the support plate of the arc cooling apparatus 150 and are fastened together with the breaker housing, the arc cooling apparatus 150 is inserted into the breaker housing Tightly coupled.

3 is a cross-sectional view showing an arc cooling apparatus 150 cut along the line A-A in Fig. Referring to FIG. 3, the arc cooling apparatus 150 is formed with a staggered movement path 154 therein so as to increase the movement path of the arc. The zigzag movement path 154 has a tip communicating with the arc inlet hole 153 and a rear end communicating with the arc discharge hole 152 to provide a function of cooling the arc through contact with the arc. In other words, as the staggered movement path becomes longer, the cooling effect of the arc flowing into the arc cooling device 150 becomes higher.

 As shown in FIG. 3, at the tip of the staggered movement path 154, an extended inflow portion is formed to allow an arc ejected from the breaker housing to be introduced. At the end of the staggered movement path, An extended discharge portion is formed so as to be discharged. At this time, as shown in FIG. 3, the inflow portion is formed to have a gradually reduced sectional area from the front end to the rear end so that the arc can be smoothly moved.

If necessary, the zigzag travel path may be coated with a thermal diffusion film on its inner surface. The thermal diffusion layer may be formed of a metal material to promote heat dissipation of the arc, and graphene or graphite may be used as the metal material.

4, the arc cooling apparatus 150 includes an arc inflow hole 153 through which an arc discharged from the housing of the circuit breaker 110 flows, and an arc discharge hole 152 through which the cooled arc is discharged And an arc-quenching unit 155 inserted into the arc-cooled housing 151 to perform cooling and removal of the arc. For this purpose, the arc cooling housing 151 is formed with a hollow communicating with the arc inflow hole 153 provided on the side opposite to the breaker housing so that the arc extinguishing unit 155 can be inserted. At this time, it is preferable that the hollow is formed to have a rectangular parallelepiped structure so as to stably support the interpolated arc soaking unit 155 even if the arc soap unit 155 can be interpolated.

The arc extinguishing unit 155 is provided to maximize the effect of removing the arc blown from the circuit breaker 110. The arc extinguishing unit 155 may be a high temperature baked ceramics, a porous mineral, a radiating fin assembly, a wound coil, or the like. Here, as the porous mineral, any one selected from the group consisting of mica, zeolite, ilite, bentonite, diatomaceous earth, kaolinite, quartzite, vermiculite and perlite can be used.

If necessary, a discharge path adjusting cap (not shown) may be provided in the arc discharge hole 152 of the arc discharge device. This discharge path adjustment cap is modularly coupled to the arc discharge hole 152 to adjust the discharge direction of the arc discharged through the arc discharge hole 152.

More specifically, the discharge path control cap is formed to have a size covering a plurality of, preferably four, arc discharge holes 152 and is seated on the upper surface of the arc cooling device 150, And a rotary arc discharge port formed in the upper portion of the seat plate and formed in a conical structure so as to adjust the discharge direction of the arc as it is rotated do. At this time, a discharge hole is formed at a position spaced from the center axis of the rotary arc discharge port so that the position of the arc discharge port can be changed by self-rotation.

Thus, the discharge path control cap prevents damage to the machine mechanism by allowing the manager to discharge the arc in a desired direction. This is because, even if the arc is cooled through the arc cooling device 150, if the arc is blown in the direction of the machine mechanism, the arc may physically damage the machine mechanism.

In other words, the discharge path adjusting cap can be coupled to the arc discharge hole 152 to adjust the discharging direction of the arc even if the expensive material or the complicated structure is not used. Therefore, .

On the other hand, the above-described door is provided in the case for opening and closing an opening of the case, and at least one door is provided.

The door lock is provided to lock the door so that the door is not opened even if a physical force acts on the door by an unauthorized person. When the password designated by the keypad is inputted or the designated NFC card is placed close to the door, Release.

5, the automatic restoration device 120 is in contact with the lever so as to press the lever provided on the circuit breaker 110 to one side, and receives a signal from the control device 140, To the initial state (ON). Any type of driving device may be used as the automatic restoration device 120 if such a purpose can be achieved.

6, the automatic recovery device 120 includes a drive motor 124 driven in accordance with a control signal from the control device 140, a bracket (not shown) for supporting the drive motor 124, The lever 112 of the circuit breaker 110 is moved upward and downward to restore the lever 112 to the initial state (ON) during operation of the drive motor 124, And the like.

The monitoring device 130 monitors the state of a mechanical device installed in the switchboard 100 to receive monitoring data to generate surveillance data. The surveillance device 130 detects surplus or short circuit such as voltage, current, The management server 200 generates surveillance data so as to analyze the presence or absence of an abnormal state and provides the surveillance data to the control device 140. [

More specifically, the monitoring apparatus 130 measures the state of each facility (ON / OFF of the mechanical apparatus, temperature, humidity) and various alarms. If necessary, the monitoring device 130 may control at least one of the line voltage, the phase voltage, the phase current, the load factor (ratio of the current to the set current), the total active power, the frequency, the active power, the total reactive power, And has a function of providing two or more measurements to the control device 140.

In a specific aspect, the monitoring apparatus 130 according to the present invention includes an atmosphere detection module for detecting a partial discharge and a fire by detecting a wavelength of a light source, a vibration detection module for detecting vibration and sound generated at a contact portion of the busbar, And a current detection module installed in the machine mechanism for detecting a phase current.

The communication device transmits the monitoring data generated through the monitoring device 130 and the generated blocking signal to the control device 140 to the management server 200 via the communication network, (110) recovery signal, which is connected to the communication network.

The controller 140 is installed in the switchboard 100 and is connected to the circuit breaker 110, the automatic restoration device 120, the monitoring device 130 and the communication device. The control device 140 monitors the circuit breaker 110, Generates a shutoff signal when the shutdown signal is generated by the shutoff device 110, collects monitoring data from the monitoring device 130, transmits the shutoff signal and the monitoring data to the outside, And controls the operation of the automatic restoration device 120. The controller 140 controls the operation of the automatic restoration device 120 to return the breaker lever 112 at the trip position to the initial position .

If necessary, the control device 140 may supply the monitoring data provided from the monitoring device 130 to the memory so that the monitoring data generated by the monitoring device 130 can be checked in the case of checking the state of the field manager switchboard 100 Can be stored. In addition, the control device 140 may store the time and frequency of generation of the blocking signal in the memory so that the field manager can check the number of trips of the circuit breaker 110. To this end, the memory is connected to the controller 140.

7 is a configuration diagram for explaining the management server 200 according to the present invention.

Referring to FIGS. 1 and 7, a remote monitoring and control system of a circuit breaker according to the present invention includes a management server 200.

The management server 200 is connected to each switchboard 100 through a communication network and receives monitoring data and a shutoff signal from each switchboard 100 and analyzes the state of each switchboard 100. The control server 200 analyzes the state of the switchboard 100 To remotely control the recovery of the circuit breaker 110 or to request a visit to the field manager for inspection.

The management server 200 generates a breaker recovery signal of the breaker 110 and transmits the breaker recovery signal to the switchboard 100 in which the breaker 110 is installed. The management server 200 determines the generation of the breaker restoration signal by analyzing the mutual analysis in real time, that is, the phase current according to the atmospheric temperature, the bus bar temperature analysis, the seasonal phase current, the bus bar temperature correlation analysis, For example, when the management server 200 determines that the breaker 110 is operated by the overcurrent caused by the lightning, the management server 200 outputs the breaker 110 recovery signal so that the lever 112 of the breaker 110 rotates to the initial position .

In addition, the management server 200 generates inspection request information of the switchboard 100 when the switchboard 100 is analyzed to be in a state requiring a visit inspection. In this case, the management server 200 transmits the check schedule information to the terminal of the field manager who manages the corresponding switchboard 100. For this purpose, a field manager dedicated to each switchboard 100 is designated, and the cell phone number of each field manager can be stored in a storage device built in the management server 200. [ At this time, the inspection request information may include monitoring data of the inspection control panel 100 so that the inspector can check the status of the control panel 100 to be inspected.

To this end, the management server 200 according to the present invention includes a database 210, a switchboard management unit 220, a communication unit 230, and a control unit 240, as shown in FIG.

The database 210 stores monitoring data and shutdown signals transmitted from each switchboard 100 through a communication network. At this time, the monitoring data and the blocking signal may be stored in the database 210 in a state of being classified according to each of the switchboards 100 and the time zone. Accordingly, the administrator can check temperature, phase current, fire, vibration, partial discharge, etc. inside the switchboard 100 for each of the switchboards 100 by time zone.

Based on the monitoring data, the switchboard management unit 220 analyzes whether the operation of the circuit breaker 110 is caused by a temporary overcurrent or a permanent circuit damage such as a short circuit or a short circuit, And transmits it to the control unit 240.

The communication unit 230 is connected to the communication network, receives the monitoring data and the blocking signal, transmits a restoration signal of the circuit breaker 110 to the switchboard 100, and transmits the inspection request information to the terminal of the field manager.

The control unit 240 stores the monitoring data in the database 210 when the monitoring data and the blocking signal are received in the communication unit 230 and outputs a recovery signal of the circuit breaker 110 provided from the switchboard management unit 220 to the communication unit 230 And provides the inspection request information provided from the switchboard management unit 220 to the terminal of the field manager through the communication unit 230. [

In addition, the control unit 240 analyzes the monitoring data periodically transmitted from the switchboard 100 to predict a change in the state of the switchboard 100 even when the switchboard 100 is in a normal operation, thereby collectively operating the entire switchboard 100 Provides management functions.

If necessary, a video output device may be connected to the management server 200.

The video output apparatus outputs monitoring data received by the management server 200 so that an administrator can monitor it, and a monitor or a television can be used.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that it is possible.

100: Switchboard 110: Circuit breaker
120: Automatic restoration device 130: Surveillance device
140: control device 200: management server
210: Database 220: Switchboard management unit
230: communication unit 240:

Claims (6)

A switch for detecting the occurrence of an overload or a short circuit in the switchboard circuit to cut off the power supply; an automatic recovery device in contact with the lever so as to press the lever provided on the breaker in one direction; A monitoring device for monitoring the state of the machine tool to generate monitoring data, and a controller for generating a blocking signal by detecting the power supply cutoff by the circuit breaker, collecting monitoring data from the monitoring device, And a control device for receiving the breaker recovery signal from the outside and controlling the operation of the automatic recovery device; And
The switchboard is connected to each switchboard through a communication network. The switchboard receives the cutoff signal and the monitoring data from the switchboard and analyzes the state of each switchboard to generate a breaker recovery signal for the breaker requiring breakdown recovery. The breaker recovery signal is transmitted to the switchboard The remote monitoring and control system of the circuit breaker including the management server. The system according to claim 1, wherein the management server
Wherein the control center generates inspection request information of the switchboard when the switchboard is analyzed to be in a state requiring a visit inspection, and transmits the inspection request information to the terminal of the field manager. The method according to claim 1,
Further comprising an arc cooling device coupled to the housing of the circuit breaker for cooling and discharging the arc blown from the housing when the circuit breaker is short-circuited. The apparatus of claim 3, wherein the arc cooling apparatus
An arc cooling housing having an arc inflow hole through which arc discharged from the housing of the circuit breaker flows and an arc discharge hole through which the cooled arc is discharged,
And an arc extinguishing unit inserted into the arc cooling housing to perform cooling and removal of the arc. 5. The apparatus of claim 4, wherein the arc-
Wherein the porous material is any one selected from the group consisting of mica, zeolite, ilite, bentonite, diatomaceous earth, kaolin, verbena, vermiculite, and pearlite. 5. The apparatus of claim 4, wherein the arc cooling apparatus
Further comprising a discharge path adjustment cap modularly coupled to the arc discharge hole to adjust a discharge direction of the arc discharged through the arc discharge hole.

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