KR101711435B1 - Distributing board having earthquake-proof function and vibration detection function - Google Patents

Abstract

The present invention relates to a distribution board. The distribution board comprises: a housing which includes an internal space in which power equipment configured to control a current supplied to a feed or distribution line is installed; a vibration detection unit which outputs a vibration detection signal corresponding to the strength and direction of detected vibration when the vibration having a magnitude equal to or larger than a predetermined magnitude is detected from the housing; a warning signal generation unit which includes a display unit and which outputs a warning signal; and a load control unit which controls a switch, connected to the feed or distribution line disposed in the housing from which the vibration has been detected, based on the vibration detection signal so that a load, configured to receive power via the feed or distribution line disposed in the housing from which the vibration has been detected, is prevented from receiving the power, which controls the warning signal generation unit to output the warning signal, and which controls the display unit to display information regarding the strength and direction of the detected vibration. According to the present invention, when vibration is detected from the housing, the warning signal can be output on a load basis, or power can be shut down on the load basis.

Description

[0001] The present invention relates to a distribution board having an earthquake-proof function and a vibration detection function (a high-voltage switchboard, a low-voltage switchboard, a motor control panel, a distribution board)

The present invention relates to a high-voltage switchboard, a low-voltage switchboard, a motor control board, and a distribution board (hereinafter referred to as "switchgear ") which are provided with seismic function and vibration detection function and can generate a warning signal upon detection of vibration, will be.

In general, the term "switchgear" refers to the installation of various instruments, control switches, protective relays, That is, the switchgear is an electrical equipment that supplies power to a load by receiving power and converting it to a voltage required by the load. Electricity rooms provided in buildings, factories, or apartments are equipped with power transmission and distribution panels that receive high-voltage or extra-high voltage electricity supplied by electric power companies and distribute them to the load of each customer.

The switchgear can be divided into high voltage, low voltage, and high voltage depending on the power supply system and voltage of the power system. The high voltage class is usually divided into high pressure water (LBS), voltage transformer (MOF) A transformer half (PT half), and a special breaker base (VCB half). In addition, the power switchgear includes power devices such as a load break switch (LBS), a lightning arrester LA, a power fuse PF, a voltage transformer (MOF) for a meter, a vacuum breaker (VCB) And a secondary bus line electrically connected to the power device for taking out the secondary power controlled by the power device to the outside, and a high-voltage current Flow.

On the other hand, the switchgear should be constructed and installed to reflect the earthquake-proof measures such as basic design, power facility arrangement, use of high-strength power equipment, and use of resisting structures by seismic countermeasures guides such as earthquake-

Preceding documents related to this are 'Vibration Absorption Type Switchboard' of Korean Patent Registration No. 10-1012733 and 'Switchboard with improved vibration sensing function' of Korean Patent Registration No. 10-1568845.

However, it is difficult to apply the effective seismic design method due to the structural change of the switchboard and the difficulty of verification of the seismic performance, especially the increase of the cost required for the application of the seismic design, due to the avoidance of the electric power consumers. For this reason, seismic design is not applied to the switchboards in most buildings except for some parts such as nuclear power, thermal power, and hydroelectric power plants. Therefore, when an earthquake occurs, The loss of life and loss of property can be caused by the occurrence.

Therefore, it is necessary to prevent damage to the internal parts of the switchboard due to the vibration and shock of the earthquake, to detect the vibration, and to take appropriate measures.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a power storage and transmission system having an earthquake-proof function and a vibration detection function and capable of generating a warning signal when a vibration is detected or shutting off a power supply for each load.

According to another aspect of the present invention, there is provided a switchgear comprising: a housing having an internal space and provided with an electric power device for controlling a current supplied to a distribution line or a distribution line in the internal space; A vibration sensing unit for outputting a vibration sensing signal corresponding to the intensity and direction of the sensed vibration and a display unit for outputting a warning signal, Controls a switch connected to a wiring line or a branching line of the detected housing to control power supply to a load that is supplied with power through a wiring line or a distribution line of the housing in which the vibration is sensed, And outputs information about the magnitude and direction of the sensed vibration to the display unit And a load control unit that controls to display.

A reinforcing member may be provided on the upper surface, the lower surface, the left surface, and the right surface of the housing to correspond to a torsional stress, and a buffer member for absorbing vibration in all directions may be installed in the lower portion of the housing.

When the sum of the power supplied through the distribution line or the distribution line exceeds a predetermined limit power, the power supply is sequentially supplied in accordance with a preset order for each load to be supplied with power through the distribution line or the distribution line And a control unit for receiving the control signal and transmitting the control signal to a predetermined load control unit, wherein the operation state and the power-related measurement value of each load, which are supplied with power through the power distribution line or the power distribution line, And a main control unit for displaying the main control unit.

According to the present invention, a reinforcing member can be provided on the upper surface, the lower surface, and the left and right sides of the switchgear to cope with torsional stress, and a buffer member can be provided at the lower portion of the switchboard to absorb vibration from all directions. In addition, when vibration is detected, a warning signal may be outputted for each load or the power supply may be cut off and the detected vibration related information may be displayed. In addition, when the vibration is detected, the warning signal may be outputted or the power may be turned off according to the intensity of the vibration and the distance of the operator near the switchboard, thereby preventing unexpected accidents.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a configuration of a switchboard according to an embodiment of the present invention; FIG.
2 is a view showing an example of a housing of a power transmission /
3 is a view of a switchboard housing according to an embodiment of the present invention,
FIG. 4 and FIG. 5 are views referred to the description of the shock absorber provided at the lower portion of the switchgear housing according to the embodiment of the present invention,
6 is a block diagram for explaining a configuration for outputting a warning signal or shutting off power supply according to a vibration detection signal,
FIGS. 7 and 8 are views showing an example of the configuration of the vibration sensing unit, and FIGS.
9 is a flowchart illustrating a process of outputting a warning signal or shutting off power supply when a vibration detection signal is generated.

Hereinafter, the present invention will be described in detail with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a configuration of a switchboard according to an embodiment of the present invention; FIG.

Referring to FIG. 1, in a switchboard 100, a plurality of distribution or distribution lines 2 are branched from a main line 1 to form a single power system.

A load breaker switch 10 and a MOF (Metering Out Fit) 15 which are instrumental transformers are installed in the main line 1. The meter transformer 15 is provided with an electric power meter WHM (Watt- Hour meter 20 is connected. A vacuum circuit breaker (VCB) 25 is provided between the MOF 15 and the transformer 30 and a power system is protected in the lower end of the transformer 30 when there is an abnormality in the power system in the main path 1. [ An air circuit breaker (ACB) 35 is installed.

(MCCB) 40a to 40n are provided in the power distribution or distribution line 2 for protecting the power system when an overcurrent or a leakage current occurs. The circuit breakers 40a to 40n are assembled integrally in an insulating container with an opening / closing mechanism, a trip device, etc., and can be opened or closed by manual or electric operation in the energized state. In the abnormal state such as overload and disconnection, .

Magnetic switches (MS) 60a to 60n are provided at the lower ends of the wiring breakers 40a to 40n. The electromagnetic switches 60a to 60n are used in combination with an electromagnetic contactor and an overload relay, and are used for protecting and controlling the load by operating / stopping the load of the motor or the like by turning on / off the electromagnetic contactor. The load is stopped by turning off the operation power of the magnetic contactor.

The current sensing portions 50a to 50n can be installed between the wiring breakers 40a to 40n and the electromagnetic switches 60a to 60n for each distribution line or distribution line and have a function of detecting a ground fault current, . Here, a ground fault current refers to a current that may cause an accident such as fire, shock or electric shock of the load axis or damage of the apparatus due to current flowing to the earth as one phase of the power supply system contacts the ground. In addition, leakage current refers to a current that can cause fatal danger and damage to human body or equipment as a result of insulation deterioration of the equipment or line, when a part of the power supply system contacts the ground with high resistance and flows to an undesired place.

Vibration detecting portions 70a to 70n for detecting vibrations can be installed in the special high-voltage panels 3, 4 and 5, the transformer panel 6, and other low-voltage panels, the motor control panel and the distribution panel. The vibration sensing units 70a to 70n may transmit a vibration sensing signal corresponding to the magnitude of the sensed vibration to the load controller 130 when a vibration having a predetermined magnitude or more is sensed.

Figs. 2 and 3 show an example of a switchboard housing. Fig.

Referring to FIG. 2, the housing 200 of the switchboard 100 is sealed by front, back, right and left, and top and bottom, and electric devices, primary buses, secondary buses, have.

The power device is installed in the inner space of the housing 200 and controls the supplied power. Examples of the power device include a vacuum circuit breaker 20, an air circuit breaker 30, and the like. The primary bus line is for supplying power from outside the housing 200 to the power equipment, and the power supplied through the primary bus line is commonly referred to as a primary power supply. The secondary bus is for discharging the power controlled by the power device to the outside of the housing, and the power that is controlled by the power device and is drawn out through the secondary bus is generally referred to as secondary power.

Front doors 203 and 205 are disposed on the front surface of the housing 200 and a rear door unit (not shown) may be disposed on the rear surface of the housing 200. The front door portions 203 and 205 can be configured to be isolated from the interior space of the switchboard through the protection panel structure and the rear door portion can be provided on the rear surface of the housing 200 to close the inner space of the housing 200, As shown in Fig. That is, when the rear door portion is closed, the inner space of the housing 200 is made to be an independent space. When the rear door portion is opened, the inner space of the housing 200 is communicated with the outside, It can be configured to be able to repair or replace buses, secondary buses or power equipment.

Inside the housing 200, a high-voltage is applied. In order to insulate it from the earth, it is insulated from the earth by using epoxy resin water or the like.

FIG. 3 is a view of a switchboard housing according to an embodiment of the present invention.

Referring to FIG. 3, reinforcing members 207 and 209 having a triangular shape may be provided on the upper surface, the lower surface, the left surface, and the right surface of the housing 200. That is, the reinforcing members 205 and 207 may be provided on the other surfaces except the front and rear surfaces of the housing 200 where the front door portion and the rear door portion are disposed.

The reinforcing members 207 and 209 thus provided reinforce the structure of the housing 200 so as to be able to cope with the torsional stress transmitted to the housing 200 by an earthquake or the like.

In addition, a display unit 81 for displaying information related to the power and / or switchboard, and an acoustic unit 83 for receiving and outputting acoustic signals can be disposed on the front surface of the housing 200.

4 and 5 are views referred to the description of the buffer member provided at the lower portion of the housing.

4 and 5, a buffer member 220 is provided between the bottom surface of the housing 200 and the ground to absorb vibration from all directions.

The buffer member 220 includes a first plate 221 coupled to the bottom surface of the housing and a second plate 223 coupled to the ground. The first plate 221 is formed with at least one engagement hole 222 for fixing the first plate 221 to the bottom surface of the housing 200 through a fastening member such as a screw. The second plate 223 is also formed with one or more engagement holes 224 for fixing the second plate 223 to the ground surface through the fastening member.

The first plate 221 and the second plate 223 are rectangular in plan view and the steel elastic member 225 is screwed to the second plate 223 at the central portion of the upper surface of the second plate 223, A first plate 221 is disposed on the upper side of the steel elastic member 225. The first plate 221 and the second plate 223 are separated and joined by the four buffer spring portions 227.

With this configuration, the steel elastic member 225 absorbs the vibration in the vertical direction, and the buffer spring portion 227 can absorb the vibration in the horizontal direction or the oblique direction.

Generally, a seismic wave is composed of a P wave having the same vibration as the traveling direction, an S wave oscillating perpendicularly to the traveling direction, an L wave (love wave) and an R wave (Rayleigh wave) It is possible to absorb vibrations from any direction of X, Y and Z, so that seismic waves in all directions can be absorbed.

In addition, the strength of the steel elastic member 225 may be physically determined so as to be designed to be equal to or higher than the yield strength due to the load of the housing 200, so that the loss of the vibration absorbing function due to the elastic loss can be prevented.

6 is a block diagram illustrating a configuration for outputting a warning signal or shutting off power supply according to a vibration detection signal.

Referring to FIG. 6, the switchboard 100 may further include a human body sensing unit 80 and a warning signal generating unit 85. The warning signal generating unit 85 includes a display unit 81 and an acoustic unit 83 disposed in the housing 200 and is provided with an acoustic signal output through the acoustic unit 83 or an acoustic signal output from the display unit 81 A warning message, and other optical signals. The human body detecting unit 80 uses a pyro-infrared ray sensor and a light curtain sensor to detect that the operator or other person is approaching within a predetermined distance.

The load control unit 130 controls the warning signal generating unit 85 according to the vibration sensing signal transmitted from the vibration sensing unit 70 and outputs a sound signal, an optical signal, a warning message displayed on the display disposed on the switchboard A warning signal can be output.

In a state where the vibration sensing signal is transmitted, the load control unit 130 outputs an open / close control signal to the power control unit 130 when the operator senses that the proximity of the operator is within a certain distance from the switchboard through the human body sensing unit 85, Or may control the warning signal generating section 85 to output a warning signal.

When the current sensing unit 50 receives the current sensing signal from the load control unit 130 and detects that the operator is within a predetermined distance from the switchboard through the human body sensing unit 80, May output an open / close control signal to interrupt the power supply, or may control the warning signal generating section 80 to output a warning signal.

On the other hand, the demand controller 110 predicts and monitors the currently used power and automatically cuts off or loads the load so as not to exceed the set target power. The dimmer controller 110 is connected to the WHM 20, receives the demand and power consumption, and measures the demanded power. Here, the demanded power means an average value of the power measured during the demand time. The demand time limit is a predetermined time length in order to obtain the average power, and is usually set to 15 minutes in the domestic market. Can be defined as the basic time for computing the load and controlling the load.

Demand controller 110 may set and control different target powers by dividing the daytime, evening, and nighttime according to the differentiated power rates by time slot.

The main control unit 120 is connected to the demand controller 110 and transmits a control command to the connected load control unit 130 according to the set control method. The main control unit 120 receives the operation state or measurement value for each load and displays the received operation state or measurement value on the monitor.

The load control unit 130 outputs an open / close control signal to control the wiring breaker 40a to 40n and the electromagnetic switches 60a to 60n in accordance with the control command received from the main control unit 120 so that the loads 90a to 90n ) Can be supplied or disconnected separately.

Thus, when the total used power of the switchboard 100 exceeds the preset limit power, the demand controller 110 transmits a control signal for shutting off or connecting the power supplied to the specific load to the main control unit 120, The main control unit 120 may transmit the control signal to the load control unit 130 for controlling the load to control the maximum demand power.

7 and 8 are views showing an example of the configuration of the vibration sensing unit.

Referring to FIGS. 7 and 8, the vibration sensing unit 70 has four or more conductive balls 71 disposed therein. The conductive ball 71 is initially disposed in the upper accommodating portion 77 and moves away from the accommodating portion 77 in accordance with the vibration and is moved downward through the moving portion 73 by gravity to bring the contacts 74, 75). When the conductive ball 71 is positioned on the contact points 74 and 75, the contact points 74 and 75 are electrically connected by the conductive ball 71. Accordingly, the vibration sensing unit 70 outputs a vibration sense signal can do.

The depth of the accommodating portion 77 for accommodating the respective conductive balls 71 is different from each other so that the conductive ball 71 is separated from the accommodating portion 77 by the strength of different vibrations, The vibration sensing signal corresponding to the intensity of the vibration can be outputted by outputting different vibration sensing signals according to the number of the conductive balls 71 rolled up on the conductive balls 71,

In addition, the vibration sensing signal may include a unique identification number for each of the vibration sensing units 70 so that the vibration sensing unit 70 can know where the vibration sensing signal is output.

The operator checks the housing 200 or the internal power device in which the vibration sensing part 70 is disposed and if the vibration sensing signal is not abnormal the operator may place the conductive ball 71 in the initial receiving part 77, Position to detect the vibration again.

9 is a flowchart illustrating a process of outputting a warning signal or shutting off power supply when a vibration detection signal is generated.

In the following description, it is assumed that the first human body sensing part 80a and the second human body sensing part 80b are installed at a position adjacent to the rear surface of the housing 200 in the inner space of the housing 200. [ At this time, a far-infrared ray sensor may be used as the first human body sensing unit 80a, and a light curtain type sensor may be used as the second human body sensing unit 80b.

Referring to FIG. 9, the load controller 130 determines whether the vibration sensing unit 70 senses a vibration of a first magnitude or more and a magnitude of a second magnitude or less (S300) , The first size is a vibration having a magnitude greater than a reference magnitude requiring inspection of the power switchboard, and the second magnitude is a magnitude that is expected to cause damage to the power distribution board due to the greater magnitude of vibration than the first magnitude.

When the operator is sensed by the human body sensing unit 80 in a state in which the vibration of the first size or more and less than the second size is sensed at step S305, the first human body sensing unit 80a senses the opening of the door unit of the housing 200 When the distance between the worker and the primary bus line or the secondary bus line or the distance between the operator and the power device is within the first distance d1 (S305), the first sensing signal is output.

When the first sensing signal is output, the load controller 130 controls the warning signal generator 85 to output a warning signal (S315).

The warning signal may be a sound signal output to the acoustic unit 83 disposed in the housing 200, a warning message displayed on the display unit 81 disposed in the housing 200, or other optical signal . In addition, information such as the magnitude of the vibration and the position or direction in which the vibration is sensed can be displayed on the display unit 81 disposed in the housing 200.

Such an alarm signal can alert the operator of an electric shock and can recognize the position or direction in which the vibration is sensed, thereby starting the inspection from the corresponding position or direction and improving the working efficiency.

The first distance d1 can be set to about 50 cm. The first human body sensing part 80a may be installed on the upper side of the rear side of the housing 200 in the internal space of the housing 200 and may be provided with a first distance d1 from the primary bus, It can be installed at a distance of about 50cm.

When the distance between the worker and the electric power device is within the second distance d2 (S320), the second human body detecting portion 80b detects that the second sensing signal . When the second sensing signal is output, the load controller 130 outputs an opening / closing control signal to interrupt the power transmitted through the primary bus and the secondary bus (S325).

The power source that is drawn into the power device through the primary bus is a power source that is supplied from another < RTI ID = 0.0 > switchgear < / RTI > Accordingly, when the second sensing signal is output, the load controller 110 turns off the electric power of the power devices of the other power switchboards disposed on the upstream side so that the current does not flow into the power switchboard where the primary bus bar is installed.

In the case of extra high voltage or high voltage power, a high voltage current of about 22,900V flows through the power device and the bus installed in the internal space. There is a case where the operator is instantaneously drawn to the apparatus side due to the above-described high-voltage current to cause an electric shock accident, even if the operator approaches the electric apparatus, the primary bus line or the secondary bus line within a certain distance without contacting the apparatus. Normally, when a high voltage current of about 22,900 V flows, when the distance between the device and the operator is less than 20 cm, the operator sucks the device to the side, so that the second distance d2 can be set to about 30 cm.

The second human body sensing portion 80b may be installed in the inner space of the housing 200 in the vertical direction on the rear side of the housing 200 and may be provided at a second distance d2 from the primary bus, For example, about 30 cm.

If the vibration sensing unit 70 senses a vibration having a second magnitude or more, the load controller 130 outputs an open / close control signal to cut off the power transmitted through the primary bus and the secondary bus ( S335). The vibration of the second size is a vibration that causes damage to the power device in the housing 200 or the housing 200. In this case, the power transmitted through the primary bus line and the secondary bus line is blocked do.

At this time, only the power supply to the load connected to the switchboard in which the vibration is detected can be selectively blocked. In addition, it is possible to indicate that power is cut off to the display unit 83 disposed in the housing 200, and information about the housing in which power is currently turned off can be displayed on the display unit disposed in another housing.

With this process, when the vibration is detected and the distance between the worker and the bus or electric power device in the power supply and control panel through which a high-voltage current flows is within a predetermined distance in the state where the power supply is not cut off, It is possible to obtain an effect of preventing an electric shock of an operator. In addition, even if there is not a distance enough to worry about an electric shock accident, the alarm signal is output when the distance is within a predetermined distance, so that the operator can be warned of an electric shock accident.

In addition, when vibration of an intensity at which damage is likely to be detected is detected, the power of the switchboard can be cut off, and the damage due to the damage of the switchboard can be prevented in advance.

Also, the above-described process can be applied to a case where a ground fault current, a leakage current, an over current, etc. are detected. In other words, when the ground current, leakage current, overcurrent, or the like is detected, and the distance between the operator and the bus or the power device in the power switch with high current flows near the predetermined distance, It is possible to prevent the electric shock of the worker and to warn the operator of the electric shock accident by outputting the warning signal when the distance is within the predetermined distance although there is not enough distance to worry about the electric shock accident.

It should be noted that the configuration and method of the embodiments described above are not limitedly applied, and the embodiments may be modified such that all or some of the embodiments are selectively combined .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

50a to 50c: current sensing units 60a to 60c:
70a to 70n: vibration sensing unit 80: human body sensing unit
85: Warning signal generator 110: Demand controller
120: main control unit 130: load control unit

Claims (6)

And a power device for controlling a current supplied to the power distribution lines and the power distribution lines is provided in the inner space, and a reinforcing member for supporting the torsional stress is provided on the upper and lower surfaces, right and left side surfaces, And a cushioning member having a plurality of cushioning spring portions for absorbing vibrations in the lateral direction and the oblique direction;
A vibration sensing unit for outputting a vibration sensing signal corresponding to the intensity and direction of the sensed vibration when a vibration of a predetermined size or more is sensed in the housing;
A warning signal generating unit including a display unit and outputting a warning signal; And
A controller for controlling the switch connected to the wiring line or the branching line of the housing in which the vibration is sensed based on the vibration detection signal to supply power to the load through which the power is supplied through the wiring line or the branching line of the housing, To be blocked,
And a load controller for controlling the warning signal generator to output the warning signal and to display information on the magnitude and direction of the sensed vibration on the display unit,
Wherein the vibration sensing unit comprises:
Wherein the plurality of conductive balls are separated from an initially disposed upper accommodating portion according to vibrations of different sizes and directions and are rolled by gravity through a moving portion to a corresponding contact disposed at a lower portion And outputs the vibration sensing signal corresponding to the detected intensity and direction of the vibration by electrically connecting the corresponding contacts. delete delete The method according to claim 1,
The cushioning member,
A first plate coupled to a bottom surface of the housing;
A second plate coupled to the ground;
The steel elastic member disposed between the first plate and the second plate; And
And a plurality of buffer springs for coupling the first plate and the second plate to each other. The method according to claim 1,
When the total sum of the power supplied through the distribution line or the distribution line exceeds a predetermined limit power, the power supply is sequentially cut off in accordance with a preset order according to a load supplied with power through the distribution line or the distribution line A demand controller for transmitting a control signal for connection; And
And a main control unit for receiving the control signal and transmitting the control signal to a predetermined load control unit and displaying a power-related operation state and a power-related measurement value, the power being supplied through the power distribution line or the power distribution line. The method according to claim 1,
A primary bus for receiving power from the outside of the housing to the power device; A secondary bus for drawing the power controlled by the power device to the outside of the housing; Further comprising a door portion that opens or closes an inner space of the housing and allows an operator to access the primary bus, the secondary bus, or the power device when opened,
A first human body detecting unit for outputting a first sensing signal when the distance between the operator and the primary bus, the secondary bus or the power device is within a first distance;
And a second human body sensing unit for outputting a second sensing signal when the distance between the operator and the primary bus, the secondary bus or the power device is within a second distance that is closer to the first distance than the first distance,
Wherein the load control unit controls the load control unit such that when the first sensing signal is output in a state in which the first vibration sensing signal corresponding to a magnitude of vibration greater than the first vibration magnitude and less than the second magnitude of vibration is output, and,
When the second sensing signal is output in a state in which the first vibration sensing signal is output, control is performed such that the power transmitted through the primary bus line and the secondary bus line is cut off,
Wherein when the second vibration sensing signal corresponding to the second vibration magnitude or more is output, the power transmitted through the primary bus line and the secondary bus line is cut off.

Images