KR100967618B1 - System for managing distributing board with dual-sequence apparatus - Google Patents

Abstract

PURPOSE: A distribution panel managing system with a dual sequence device is provided to stably supply power to customers by instantly repairing a sequence line in a power outage due to the failure in a sequence line. CONSTITUTION: A distribution panel(100) supplies commercial power to a load. A dual sequence device(200) comprises first and second sequence line units, a power switch, and a power input unit. The first and second sequence line units monitor and control the devices of a main line inside the distribution panel. The power switch switches the power into the second sequence unit when the first sequence line unit is broken. The power input unit applies power to the first or second sequence line unit according to the switching of the power switch.

Description

Switchgear management system with dual sequence device {System for managing distributing board with dual-sequence apparatus}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution board, and more particularly, to a distribution board having a dual sequence device that enables the power supply to be cut off or managed by dual sequence monitoring at the time of renovation or power failure of the distribution board. It relates to a management system.

Distributing Board refers to a device that constantly puts and manages switches, instruments, relays, etc. for the operation or control of power plants or substations, and the operation of electric motors.

Such switchgear is generally divided into a main circuit switchgear and a control switchgear. For example, the main switchgear of a business or private substation is a main circuit switchboard, and the operation switchgear which can be seen in a modern power plant etc. is a control switchboard. When viewed from the front of a switchboard of a private substation, there are an operation lever for opening and closing a breaker of a high voltage main circuit, a crane switch of a low voltage main circuit, a voltmeter, an ammeter, a power meter, an integrated power meter, and an eddy current relay.

There are two types of switchboards, open type and closed type. The open type shows the electrical wiring or switch terminals exposed on the back of the van, and the closed type is all contained in a painted iron plate box. It's just like gauges and operation buttons. In the case of the open type, since the unit size is standardized, the number of units is determined according to the size of the substation.

On the other hand, the main circuit switchboard is composed of a single bus system, a spare bus system, a double bus system, etc. according to the transformer secondary bus, and a switchboard having a double bus is provided with one disconnector for each bus. In case of an accident in one of the two buses, it is designed to supply power through the other bus.

1 is a diagram illustrating a disconnection diagram of a switchboard having a double bus according to the prior art.

As shown in FIG. 1, disconnectors 16 and 17 are connected to the main bus conductors 18 and 19, respectively, and one breaker 15 is installed at a position where the lines of the disconnectors are combined. The current transformer 11 is connected to one side of the breaker 15 to sense current.

The disconnectors (16, 17) is a device that performs the opening and closing operation by connecting the circuit when the electrically no-load state, the circuit breaker 15 serves to block the circuit when an accident current occurs.

In order to connect the circuits in the state in which the disconnectors 16 and 17 and the breaker 15 are open, the circuit breaker 15 should be first connected to the disconnectors 16 and 17, and then the breaker 15 should be introduced. Disconnect (15) from the circuit first and then disconnect the disconnectors (16, 17). If the circuit breaker 15 is inserted first and then the disconnectors 16 and 17 are connected to the bus bar, or the circuit breakers 16 and 17 are opened and closed first, the circuit breakers 16 and 17 are arced. Because there is no function to eliminate the arc can occur in the disconnector (16, 17) and may lead to an accident. That is, since the disconnectors 16 and 17 do not have a function of eliminating arcs, the disconnectors 15 and 17 are interlocked with the breakers 15 so that the disconnectors 16 and 17 can operate by the breakers 15 when the main circuit is opened and closed. Equipped.

On the other hand, as a prior art, Korean Patent Registration No. 10-0842789 (Application Date: September 20, 2006) discloses the invention named "multi-functional switchboard having an alarm device," as a switchboard, people, animals and obstacles The present invention relates to a multi-functional switchgear having an alarm device that can be connected to a control center to restrain the access of and access the intrusion into a plurality of switchboards in real time through a communication network. Referring to FIG. Explain.

2 is a diagram illustrating a multifunctional switchgear having an alarm device according to the prior art.

2, the switchboard 20 having an alarm device according to the prior art, the human body sensor (SR) is installed on at least one or more of the front, rear, left and right four sides; A human body detecting and processing unit 22 for processing the signal of the human body sensor SR to determine whether the human body is detected; A speaker (SP) for outputting a voice for prohibition of access according to the output of the human body detecting and processing unit 22; An alarm display unit 26 for visually confirming the prohibition of access according to the output of the human body detection and processing unit 22; And a camera 28 for capturing image information according to the output of the human body detecting and processing unit 22.

The human body sensor SR may selectively use one or more of the ultrasonic sensor SR1 and the thermal sensor SR2, or may use both of the sensors SR1 and SR2 in parallel. The ultrasonic sensor may detect both the approach of an organism having a certain size and the approach of an object, and the heat sensor is a sensor that detects a movement of a person or an animal as a heat change (infrared change).

In addition, the switchboard 20 having an alarm device according to the related art is one or more of the low-frequency magnetic field and high-frequency sound waves of the region that the human sense or hearing in accordance with the human body detection and control output of the processing unit 22. It may also include an animal removal unit 29 to output.

On the other hand, in a switchgear that receives electric power from a power generation company and processes power and delivers power to a load side, a busbar is installed to transfer power to the load side, and the busbar cuts off power delivered to the busbar. A power processing device for processing the power to a high pressure or a low pressure required for the load and the high voltage power of the load side may be installed.

The line where the breaker and the power processing device installed in the busbar line are installed is called the main line, and the line that controls and monitors the devices installed in the main line is called the sequence line. It is a device that processes power through main lines and supplies power to the load side.

If a failure occurs in such a switchboard, the power supply is interrupted. In case of a manufacturer producing a product or an emergency hospital, a problem occurs due to a power failure. In addition, the power supply is interrupted to operate the emergency generator, but since the emergency generator is a device that produces power in the same state as a power failure that is not supplied by the power generation company, and is supplied through the switchboard, if a breakdown or trouble occurs in the switchboard The emergency generator will not be able to supply power.

The interruption of the power supply can be divided into a power outage in which power is not supplied from the power generation company and an interruption of power supply due to a breakdown of the distribution panel. It can be divided into the failure of the device installed in the line and the failure of the device installed and monitored in the sequence line.

The frequency of failures in the main line of the switchboard is very low, and most of the failures occur in the apparatus installed on the sequence line. In the case where the power supply is interrupted due to the failure of such a sequence line, the replacement of simple parts such as a lamp or a fuse can be repaired by an electric room person, but in practice, most of the failure of the sequence line is a person in charge. If the manufacturer cannot replace or repair the product, the manufacturer who made the switchboard will be notified urgently.

In order to solve the above-mentioned problems, in the case of a business where the cost of loss due to a power failure is very high, the same switchboard is installed repeatedly, and power is supplied to the switchboard installed in the redundant case. In this case, since the cost of installing the switchboard is too large, there is a problem in that the installation is very difficult except for a large company or a sensitive workplace.

On the other hand, in order to cut off the power supplied to the switchboard for renovation of the switchboard, and to enter the switchboard, the work by the electrical safety rules are being performed, most of the safety due to work conditions due to on-site assessment and blackout work In many cases, the rule will be ignored. In addition, even when working in compliance with these electrical safety rules, current may be input due to an unexpected accident, or a reverse current and KEPCO current may be input due to a mistake or unexpected operation of the person in charge, or an emergency generator may operate to operate the inside of the switchboard. In this case, the electric current is input and the worker in the switchboard is electrocuted or seriously injured every year.

In order to solve the above problems, when the current flows through the current monitoring and blocking device, the breaker is momentarily interrupted by giving a signal to the contact terminal of the breaker, but it may be too late to temporarily block and prevent the current injected into the switchboard. There is a problem that can not prevent the accident.

1. Republic of Korea Patent Registration No. 10-0339331 (Application Date: May 04, 1999) 2. Korean Patent Registration No. 10-0842789 (Application date: September 20, 2006) 3. Republic of Korea Patent Registration No. 10-0888951 (filed April 27, 2007)

The technical problem to be solved by the present invention for solving the above-mentioned problems is to monitor the off state of the breaker is installed on the upper and lower side of the work section in the work to approach the switchboard or to enter the worker inside the switchboard At the same time, it is to provide a switchboard management system having a dual sequence device that continuously monitors the sequence operation so as not to input the breaker current, and can inform the presence or absence of energization according to the human approach when working the switchboard.

Another technical problem to be solved by the present invention is to provide a dual-sequence device that can replace the sequence line in case of power failure due to the failure of the sequence line and immediately restore the sequence line and repair the broken sequence line, thereby enhancing the safety of the operator. It is to provide a switchboard management system.

As a means for achieving the above-described technical problem, a switchboard management system having a dual sequence device according to the present invention, a bus bar for transmitting power to the load side, and a circuit breaker for cutting off the power delivered to the bus bar And a main line provided with a power line processing device for processing high voltage power to power required at the load side, and a switchboard for processing the power supplied from the power generation company and supplying the processed power to the load side; A first sequence line device configured to monitor and control devices of a main line in the switchboard, and a device of the main line in the switchboard in the same manner as the first sequence line device, configured in the same manner as the first sequence line device. A second sequence line device capable of monitoring and controlling the power supply; and a power switching switch for converting power input to the first sequence line device into the second sequence line device when the first sequence line device fails; A dual sequence device including a power input unit for supplying power to the first sequence line device or the second sequence line device in response to a power switching of the power supply; Characterized in that comprises a.

In the above, the mode selection switch for selecting any one of the normal mode, the renovation mode and the reserve mode is mounted on the door of the switchboard, the dual sequence device is the main sequence in accordance with the mode selected by the mode selection switch It is desirable to monitor the status of the on / off of the breaker installed in the line.

In the above, the dual sequence device preferably further comprises a circuit breaker monitoring unit for monitoring the on / off state of the circuit breaker by checking the upper contact of the primary circuit breaker on the main line and the bottom contact of the secondary circuit breaker.

In the above, the dual sequence device, the mode selection switch in a state in which one or two of the primary circuit breaker or the secondary circuit breaker is on (On) state of the result value read from the circuit breaker monitoring unit When the switch from the normal mode to the renovation mode or the reserve mode, it is preferable to further include an alarm signal generator for generating an alarm signal indicating that the breaker is not off (Off).

In the above, when the primary side and secondary side breakers are turned off and the mode selection switch is switched to the refurbishment mode, the dual sequence device is configured to turn on the primary side and secondary side breakers in the switchboard. It is preferable to switch the breaker to the off position by activating the off contact terminal of the breaker if the breaker is forced to the on position by the operator during the monitoring. .

In the above, the dual sequence device, when the mode selection switch is selected as the reserve mode, it is preferable that the power switch is connected to the second sequence line device connected to the power sequence switch connected to the first sequence line device.

The method according to claim 1, wherein the camera for photographing the image around the switchboard to confirm the approach of the person near the switchboard, and the manager terminal to obtain and read the image around the switchboard taken by the camera and communicate with the dual sequence device It may be made to include more.

In the above: The manager terminal, the image recognition unit receives the image around the switchboard from the camera to determine whether a person approaches the switchboard over a safety line, the person accesses the switchboard by the image recognition unit And a control unit for generating a control signal to check whether a current flows in the switchboard, and a control signal transmitter for transmitting the control signal to the dual sequence device. The dual sequence device may receive a control signal from the control signal transmission unit of the manager terminal to detect whether a current flows in the switchboard, and generate a current detection signal. An alarm signal generation unit for generating an alarm signal for ringing a buzzer installed on the door of the door, and a detection signal transmission unit for transmitting a current detection signal of the current detection unit to the manager terminal; This is preferred.

According to the present invention, it is possible to continuously supply power by immediately returning power supply interruption due to a device failure of a sequence line of a switchboard, thereby stopping power supply at a factory, a hospital, a building, another industrial site, or a place where a continuous power supply is needed. Can be prevented.

According to the present invention, in the breakdown and expansion of the switchboard in the operation to cut off the power input to the switchboard and the operator is put into the inside of the switchboard, by preventing the accident that the power is put into the switchboard due to unexpected accidents, The accident can be prevented in advance.

1 is a diagram illustrating a disconnection diagram of a switchboard having a double bus according to the prior art.
2 is a diagram illustrating a multifunctional switchgear having an alarm device according to the prior art.
3 is a block diagram of a switchboard management system having a dual sequence device according to an embodiment of the present invention.
4 is a diagram illustrating that a switchboard is installed in a switchboard management system having a dual sequence device according to an embodiment of the present invention.
5 is a diagram illustrating a mode display of a mode selection switch in a switchboard management system having a dual sequence device according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating an arrangement of a circuit breaker installed in a heat distributing panel in a switchboard management system having a dual sequence device according to an exemplary embodiment of the present invention.
7 is a configuration diagram of a manager terminal in a switchboard management system having a dual sequence device according to an embodiment of the present invention.
8 is a configuration diagram of a dual sequence device in a switchboard management system having a dual sequence device according to an embodiment of the present invention.
FIG. 9 is a diagram schematically illustrating power switching of first and second sequence line devices in a dual sequence device according to an embodiment of the present invention.
FIG. 10 is a detailed circuit diagram of the first sequence line device shown in FIG. 9.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

As an embodiment of the present invention, there is provided a switchboard management system having a dual sequence device for blocking the power supply interruption due to the failure of the switchboard and the unforeseen accidents occurring during the maintenance work.

3 is a block diagram of a switchboard management system having a dual sequence device according to an embodiment of the present invention.

Referring to FIG. 3, a switchboard management system having a dual sequence device according to an embodiment of the present invention may include a switchboard 100, a dual sequence device 200, a camera 300, and a manager terminal 400. have.

In a switchboard 100 that receives electric power from a power generation company, for example, KEPCO, processes electric power, and delivers electric power to a load side, busbars, which are conductors for transmitting electric power to the load side, are installed. Circuit breakers that cut off the power delivered immediately, and a power processing device for processing the power to a high pressure or a low pressure necessary for the load side of the power may be additionally installed.

In this case, a line in which a circuit breaker that cuts off power transmitted to the busbars and a high-voltage power processing device for processing power at a high or low pressure necessary for a load side is installed on the busbar, is called a main line. A line that controls and monitors devices such as breakers and power processing devices installed in a line is called a sequence line.

Specifically, the switchboard 100 is composed of a structure for attaching and supporting a unit device such as a circuit breaker or a protective relay, and a collection of conductors for connecting and connecting the unit device. The switchboard 100 is divided into a closed type and an open type according to an external type, and is divided into an ultra high voltage, a high pressure, and a low voltage switchgear according to a receiving voltage. In addition, a bus bar is mainly used as a conductor that is an electric transfer medium that transfers electric power from the switchboard 100. The bus bar is mainly made of copper, and the cross section is rectangular, and the horizontal booth depends on the installation position. It can be divided into bars and vertical busbars.

At this time, in the switchboard management system having a dual sequence device according to an embodiment of the present invention, the mode selection switch 130 for selecting any one of the normal mode, the renovation mode and the reserve mode on the door of the switchboard 100 ) Is mounted.

In addition, the devices of the sequence line are assembled and assembled in the same place. That is, the devices of the sequence line are installed in a plate called a middle plate. The middle plate may be installed in the front or side portion of the inside of the switchboard 100 under the influence of the function and structure of the switchboard 100, or may be installed in the upper middle portion or the lower middle portion of the switchboard 100.

The dual sequence apparatus 200 includes a first sequence line apparatus configured to monitor and control the apparatuses of the main line, and the apparatus of the main line in the switchboard in the same manner as the first sequence line apparatus configured in the same manner as the first sequence line apparatus. And a second sequence line device capable of monitoring and controlling the sound. The first sequence line device controls and monitors devices installed on the main line, and the second sequence line device replaces the first sequence line device when the first sequence line device fails. In addition, the dual sequence apparatus 200 monitors an on / off state of the circuit breaker installed in the main line according to the mode selected by the mode selection switch 130. That is, the dual sequence device 200 monitors the line current, monitors the primary and secondary breakers, switches to the reserve mode in the event of a failure of the first sequence line device, and maintains the presence or absence of electricity when the worker approaches during the maintenance work. Can be notified.

In addition, the dual sequence apparatus 200 analyzes the image transmitted from the camera 300 in the manager terminal 400 in accordance with the mode selected by the mode selection switch 130, the human approach signal when the person approaches Receive mode that receives the signal, and the contact terminal that receives the status of the on / off contact of the primary circuit breaker and the on / off contact of the secondary circuit breaker and the contacts of the primary and secondary circuit breakers. It may be configured as a transmission mode for transmitting the status, in this case, it may be provided with an emergency battery in case the power is not supplied due to the power outage and maintenance work. Such a dual sequence apparatus 200 will be described later with reference to FIGS. 8 to 10.

The camera 300 photographs an image around the switchboard 100 to determine whether a person approaching the switchboard 100 approaches the safety line 110.

The manager terminal 400 obtains and reads an image around the switchboard 100 captured by the camera 300, and communicates with the dual sequence apparatus 200. Such a manager terminal 400 will be described later with reference to FIG. 7.

Therefore, in the switchboard management system having the dual sequence device 200 according to the embodiment of the present invention, the supply of power is stopped due to a failure of the device installed in the switchboard 100 that receives power from KEPCO and distributes it to the load side. May resume power supply to the dual sequence device 200. In addition, the switchboard management system having the dual sequence apparatus 200 according to the embodiment of the present invention, when the work is made in the switchboard 100 due to the renovation work, the heat transfer type switchboard 100 to the dual sequence apparatus 200. Check the ON / OFF status of the upper primary circuit breaker on the top and the secondary circuit breaker on the bottom of the load to indicate whether the current is flowing when approaching the operator, and also the circuit breaker is accidentally raised during operation. This prevents the accident to prevent safety accidents.

On the other hand, Figure 4 is a diagram illustrating a switchboard is installed in a switchboard management system with a dual sequence device according to an embodiment of the present invention, Figure 5 is a switchboard management system with a dual sequence device according to an embodiment of the present invention. FIG. 6 is a view illustrating a mode display of a mode selection switch, and FIG. 6 is a diagram illustrating an arrangement of a circuit breaker installed in a heat distributing panel in a switchboard management system having a dual sequence device according to an exemplary embodiment of the present invention.

In a switchboard management system having a dual sequence device according to an embodiment of the present invention, switchboards 100a and 100b may be installed as shown in FIG. 4, and a mode selection switch as shown in FIG. 5. 130 may be mounted. In this case, the mode may be divided into a normal mode, a renovation mode, and a spare mode.

In the dual sequence apparatus 200 according to the exemplary embodiment of the present invention, an on / off contact of the primary circuit breaker and an on / off contact of the secondary circuit breaker in the fourth switchgear of FIG. It is connected to the terminal to continuously check the on / off status of the breaker, and to make the on / off contact always off to prevent it from being turned on during renovation. It can be prevented from being thrown in case of accident or turning on accidentally by worker.

Specifically, referring to FIG. 6, the primary side breaker and the secondary side breaker of the switchboard 100 are breakers installed in the first switchgear in which the breaker 140a is installed in a direction in which power is input from the fourth switchgear of FIG. 6. Breaker, the circuit breaker 140c installed in the switchgear 7 is installed in the switchboard in the direction of the power in the fourth switchgear of Figure 6 is the secondary side breaker, the primary side breaker of the switchgear 7 of Figure 6 is a breaker installed in the switchboard 4 140b, and the secondary side breaker refers to the breaker 140d installed at the switchboard No. 9.

On the other hand, the operation mode of the dual sequence apparatus 200 according to the embodiment of the present invention, as shown in Figure 5, may be made of three selection modes of the normal mode, the renovation mode and the reserve mode.

The normal mode of the mode selection switch 130 is a mode in which the switchboard 100 is normally installed and operated. The dual sequence management program installed in the manager terminal 400 analyzes the image transmitted from the camera 300. It is determined whether a person approached the switchboard 100 beyond the safety line 110 installed on the ground in front of the switchboard, and if the person approached the switchboard 100 beyond the safety line 110 in the normal mode, the dual In the sequence management program, a person access signal is transmitted to the dual sequence apparatus 200. At this time, the dual sequence apparatus 200 checks whether a current flows, turns on a warning light when the current flows, and rings the buzzer 120 to access it. It tells people that a current is flowing.

The preliminary mode of the mode selection switch 130 is a mode for selecting when an accident occurs in which the first sequence line device 230 on the first middle plate installed in the switchboard 100 fails and the current supply is interrupted. If a failure such as this occurs, the mode selection switch 130 installed on the switchboard door is switched to the reserve mode. Subsequently, when the mode selection switch 130 is switched to the preliminary mode, the power supplied to the first intermediate plate in which the first sequence line device 230 is installed, as shown in FIG. By switching the power to the second sequence line device 240 installed in the dual sequence device 200, the monitoring and control of the switchboard 100 is switched to the dual sequence device 200 to restore the function of the switchboard 100. Can be returned.

In addition, the renovation mode of the mode selection switch 130 is a mode for selecting when the overall renovation work of the switchboard 100 is necessary, when the worker is approaching the switchboard over the safety line 110 to enter the switchboard inside the switchboard is made. Is selected.

In the refurbishment mode, the presence or absence of a person around the switchboard by the camera 300 and the on / off state of the primary side breaker of the switchboard are continuously transmitted to the switchboard door lamp and the manager terminal 400 for display. If the breaker is on (on), the buzzer 120 may be sounded and transmitted to the manager terminal 400 to inform. In addition, even if a worker's mistake or an unexpected situation occurs during work, the unexpected accident can be blocked by binding the breakers of the primary side and the primary side breakers so that they are not turned on.

On the other hand, Figure 7 is a block diagram of a manager terminal in a switchboard management system having a dual sequence device according to an embodiment of the present invention.

Referring to FIG. 7, in a switchboard management system having a dual sequence device according to an embodiment of the present invention, the manager terminal 400 includes an image recognition unit 410, a controller 420, and a control signal transmitter 430. It may include, but is not limited to.

The image recognition unit 410 receives an image around the switchboard 100 from the camera 300 and determines whether a person approaches the switchboard 100 via the safety line 110.

The controller 420 generates a control signal to determine whether a current flows in the switchboard 100 when it is determined by the image recognition unit 410 that a person approaches the switchboard.

The control signal transmitter 430 transmits the control signal to the dual sequence apparatus 200.

In addition, the manager terminal 400 may be implemented as a conventional PC, it may be embedded a dual sequence management program.

8 is a configuration diagram of a dual sequence device in a switchboard management system having a dual sequence device according to an embodiment of the present invention.

Referring to FIG. 8, in a switchboard management system having a dual sequence device according to an embodiment of the present invention, the dual sequence device 200 may include a power input unit 210, a power conversion switch 220, and a first sequence line device ( 230, a second sequence line device 240, a circuit breaker monitor 250, a current detector 260, an alarm signal generator 270, and a detection signal transmitter 280.

The first sequence line device 230 monitors and controls the devices of the main line in the switchboard 100, and the second sequence line device 240 may be configured in the same manner as the first sequence line device 230. .

The power conversion switch 220 converts the power input to the first sequence line device 230 to the second sequence line device 240 when the first sequence line device 230 is broken.

The power input unit 210 applies power to the first sequence line device 230 or the second sequence line device 240 in response to the power switching of the power conversion switch 220.

The circuit breaker monitoring unit 250 monitors the on / off state of the circuit breaker by checking the top contact of the primary circuit breaker on the main line and the bottom contact of the secondary circuit breaker.

The current detector 260 receives a control signal from the control signal transmitter 430 of the manager terminal 400 and detects whether a current flows in the switchboard 100 to generate a current detection signal.

The alarm signal generator 270 generates an alarm signal for ringing the buzzer 120 installed on the door of the switchboard 100 when a current is detected from the current detector 260. In detail, the manager terminal 400 is in a mode in which one or two of the primary circuit breaker or the secondary circuit breaker are in an on state. When the selection switch 130 is switched from the normal mode to the refurbishment mode or the reserve mode, the alarm signal generator 270 of the dual sequence device 200 informs that the breaker is not turned off. An alarm signal can be generated.

The detection signal transmission unit 280 transmits the current detection signal of the current detection unit 260 to the manager terminal 400.

9 is a diagram schematically illustrating power switching of the first and second sequence line apparatuses in the dual sequence apparatus according to an embodiment of the present invention, and FIG. 10 is a detailed circuit diagram of the first sequence line apparatus illustrated in FIG. 9. to be.

Referring to FIG. 9, the dual sequence apparatus 200 checks a mode state of the mode selection switch and controls the circuit breaker on the main line not to be turned on when the mode selection switch is switched to the renovation mode. do.

Specifically, a middle plate in which the first and second sequence line devices 230 and 240 of the dual sequence device 200 are installed is installed in the switchboard 100. The dual sequence device 200 is illustrated in FIG. As described above, in the normal mode with the power switching switch 220, when the power is applied to the middle plate installed in the switchboard and operated, and a failure of the device installed in the first middle plate in which the existing first sequence line device 230 is installed occurs. In this case, the existing first middle plate is removed from the switchboard 100 for repair, and power is supplied to the second sequence line device 240 installed on the second middle plate of the dual sequence device 200. By returning the switchboard 100 monitoring and operation to enable the normal operation of the switchboard 100.

Here, when the primary side and the secondary side breakers are turned off and the mode selection switch is switched to the refurbishment mode, the dual sequence apparatus 200 may determine that the primary side and the secondary side breakers in the switchboard 100 are closed. If the circuit breaker is switched to a circuit that does not turn on during the monitoring, but the operator accidentally switches to the on position, the breaker is turned off. The breaker can be switched to the off position by actuating a contact terminal.

In addition, when the mode selection switch 130 is selected as a preliminary mode, the dual sequence apparatus 200 sets the power sequence switch 220 connected to the first sequence line 230 to the second sequence line apparatus. In order to be connected to the 240, the power applied from the power input unit 210 is applied to the second sequence line device 240.

In addition, a mode selection switch 130 may be installed in the door of the switchboard in which the dual sequence apparatus 200 is installed, and the sequence line is composed of a circuit as shown in FIG. 10, and the devices constituting the circuit are installed in a middle plate. do.

FIG. 10 is a detailed circuit diagram of the first sequence line device 230 shown in FIG. 9. The first sequence line device 230 may include a vacuum circuit breaker (VCB) 231, a circuit breaker on / off control switch 232, reset and The buzzer switch 233 may include an over current relay (OCR) 234 and 235, a display lamp 236, and the like.

In Fig. 10, 86X represents a relay switch lever, OCR-R represents an R phase overcurrent relay, and OCR-S represents an S phase overcurrent relay. Moreover, as a trip element part lever of an OCR, an ICS (Indicating Contact Switch) is a display device which shows the case where the time element which operates by disc rotation when the fault current is small is an operation trip, and it operates at the time of overload. In addition, as a trip element part lever of an OCR, an indicating instantaneous trip unit (ITT) is a display device which indicates when a fault current is large, when it is tripped by (instantaneous element) electromagnetic repulsion regardless of the rotation of the disc, and operates at a short circuit current. do. In the display lamp 236, GL denotes an off state of the VCB 231 as a green lamp, and RL denotes an on state of the VCB 231 as a red lamp. In addition, 51RX and 51SX represent the auxiliary relay of an overcurrent relay, respectively.

As a result, according to an embodiment of the present invention, by immediately returning the power supply interruption due to the failure of the equipment of the sequence line of the switchboard to continue to supply power, it is necessary for the factory, hospital, building, other industrial sites or continuous power supply Where can prevent the interruption of power supply. In addition, in the work in which the switchboard in the state where the power is turned on and installed in the breakdown and expansion work of the switchboard is cut off and the worker is put into the switchboard, the accident that the power is turned on due to an unexpected accident is caused. By preventing it, human accident can be prevented beforehand.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: switchboard 110: safety line
120: buzzer 130: mode selection switch
140a, 140b, 140c, 140d: breaker
200: dual sequence device 210: power input unit
220: power conversion switch 230: the first sequence line device
240: second sequence line device 300: camera
400: manager terminal

Claims (8)

It includes a bus bar that delivers power to the load side, a main line that is equipped with a circuit breaker that cuts off the power delivered to the bus bar, and a power processing device that processes high voltage power to the load side. A switchboard for processing the power supplied from the power supply and supplying the processed power to the load side;
A first sequence line device configured to monitor and control devices of a main line in the switchboard, and a device of the main line in the switchboard in the same manner as the first sequence line device, configured in the same manner as the first sequence line device. A second sequence line device capable of monitoring and controlling the power supply; and a power switching switch for converting power input to the first sequence line device into the second sequence line device when the first sequence line device fails; A dual sequence device including a power input unit for supplying power to the first sequence line device or the second sequence line device in response to a power switching of the power supply;
Switchgear management system having a dual sequence device, characterized in that comprises a.
The method of claim 1,
On the door of the switchboard is equipped with a mode selection switch for selecting any one of the normal mode, the renovation mode and the reserve mode,
And the dual sequence device monitors the on / off state of the circuit breaker installed in the main line according to the mode selected by the mode selection switch.
The method of claim 2,
The dual sequence device further comprises a circuit breaker monitoring unit for monitoring the on / off state of the circuit breaker by checking the top contact of the primary circuit breaker and the bottom contact of the secondary circuit breaker on the main line; Switchgear management system equipped.
The method of claim 3, wherein
The dual sequence device,
When the result value read from the circuit breaker monitoring unit maintains one or two of the primary circuit breaker or the secondary circuit breaker is On, the mode selection switch is set to the maintenance mode or the reserve from the normal mode. The switchboard management system having a dual sequence device, characterized in that it further comprises an alarm signal generator for generating an alarm signal indicating that the breaker is not turned off (Off).
The method of claim 3, wherein
When the primary side and secondary side breakers are off and the mode selection switch is switched to the renovation mode,
The dual sequence device continuously monitors whether the primary side and the secondary side breakers in the switchboard are on. If the breaker is accidentally switched to the on position by an operator during the monitoring, the breaker is turned off. (Off) Switchboard management system having a dual sequence device, characterized in that for switching the breaker to the off position by operating the contact terminal.
The method of claim 2,
The dual sequence apparatus includes a dual sequence apparatus, wherein the power selection switch connected to the first sequence line apparatus is switched to the second sequence line apparatus when the mode selection switch is selected as the reserve mode. One switchboard management system.
The method of claim 1,
And a camera for capturing an image around the switchboard to confirm the approach of a person approaching the switchboard, and a manager terminal for acquiring and reading an image of the switchboard around the switchboard and communicating with the dual sequence device. Switchgear management system having a dual sequence device, characterized in that made.
The method of claim 7, wherein:
The manager terminal receives an image around the switchboard from the camera to determine whether a person approaches the switchboard over a safety line, and if it is determined that the person has approached the switchboard by the image recognizer. A control unit for generating a control signal to check whether a current flows in the switchboard, and a control signal transmitter for transmitting the control signal to the dual sequence device;
The dual sequence device may receive a control signal from the control signal transmission unit of the manager terminal to detect whether a current flows in the switchboard, and generate a current detection signal. An alarm signal generation unit for generating an alarm signal for ringing a buzzer installed on the door of the door, and a detection signal transmission unit for transmitting a current detection signal of the current detection unit to the manager terminal;
Switchgear management system having a dual sequence device, characterized in that.

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