KR100927800B1 - Compact panel - Google Patents

Abstract

PURPOSE: An enclosed switchboard is provided to maintain insulation between a bus bar and a housing by surrounding the outer circumference of the bus bar with the wall through bushing. CONSTITUTION: First and fourth housings have the rectangular parallelepiped shape. A hinged door is formed in one side of the first to fourth housing. The second housing(3) is detachably combined in the first housing(1). One side of the second housing is contacted with the circumference of the first housing. The third housing is detachably combined in the second housing. One side of the third housing is contacted with the circumference of the second housing. The fourth housing is detachably combined in the first or third housing. One side of the fourth housing is contacted with the circumference of the first or third housing. The first housing includes a bus bar and a tube insulator. The bus bar receives high voltage of 22.9 kV. The tube insulator is protruded from the inner circumference of the first housing to support the bus bar.

Description

Closed switchboard {COMPACT PANEL}

The present invention relates to a closed switchgear capable of supplying high-voltage electricity to a certain level and then distributing the modified electricity to a home or a factory. In particular, a current passing amount using a silver-plated busbar after copper coating on aluminum To reduce the movement and reassembly time by dividing the finished product into four parts and then reassembling the unit, and to prevent the aftermath of an accident occurring in each enclosure from being transferred to the other enclosure. In addition, the present invention relates to a closed switchgear capable of quickly discharging corrosive gas introduced into the switchgear and preventing flooding of the switchgear.

In general, electrical rooms provided in buildings, factories, or apartments are provided with power and distribution boards so that the high voltage electricity supplied by the power company can be received and distributed to each customer's load.

In general, the above-described switchgear may be classified into a special high pressure plate (or a high pressure plate), a transformer plate, and a low pressure plate according to the energization procedure and voltage intensity. Receiving high-voltage electricity, the transformer panel to reduce the high pressure or special high-pressure electricity to suit the load of the customer, and the low pressure plate performs a function to discharge the low pressure electricity to a plurality of loads.

However, the conventional switchboard is a structure in which four or more switchboards are arranged in a row, and an electric chamber having a relatively large area is required.

In addition, the conventional power panel has one space inside, and power devices such as breakers, disconnectors, control circuits, and busbars are installed therein, and thus arc or flash-over of the power system. When an accident that occurs, there was a problem that the switchboard may be destroyed or the equipment or circuits therein may be destroyed by the gas or steam of the high temperature and high pressure generated inside the switchboard.

In addition, as shown in FIG. 19, the existing switchboard has a structure in which each of the enclosures commonly draws electricity from a bus busbar provided on the inner upper side of the switchboard, when an individual accident occurs in each enclosure. There was a problem that the aftermath could spread to other enclosures through the open inner top.

In addition, as shown in FIG. 20, the existing switchboard has a structure in which the upper side of the switchboard is completely closed, and there is a problem that high-pressure gas that may be generated in each compartment may damage the instrument installed inside the enclosure. .

In addition, when water at a certain level is filled in the space in which the switchboard is installed, there is a problem that an alarm means for sending a predetermined signal is not provided according to the water at the predetermined level, and when water at a certain level is filled, There was also a problem that there was no communication system to notify the administrator of such facts.

In addition, the above-described conventional switchgear is not equipped with an air purifying means for blowing fresh air into the switchgear, there is a problem that the switchgear may be exploded or corroded by volatile gas or corrosive gas.

Accordingly, the present invention solves the structural problems according to the conventional switchboard as described above, not only easy to move and reassemble, but also to maximize the amount of current passing through the busbar, the aftermath of the accident generated from each enclosure The purpose of the present invention is to provide a closed switchgear to prevent the spread of the corrugated gas into the enclosure and to prevent the flooding of the switchboard from flooding and to quickly discharge the corrosive gas introduced into the switchboard.

In addition, another object of the present invention is to provide a closed switchgear for the high-pressure gas generated in the switchboard to quickly exit the switchboard, so that components installed inside the switchboard are not damaged by the high-pressure gas. There is this.

The closed switchgear of the present invention for achieving the above object is a hollow rectangular shape inside, the first housing is equipped with a hinged door on one side, and a hollow rectangular shape inside the hollow, the swing door on one side In addition, the second housing is detachably attached to the first housing in a state in which one side is in contact with the circumferential surface of the first housing, a hollow rectangular shape in which the inside is hollow, and a door is provided on one side, and one side is the first 2 A third enclosure that can be attached to or detached from the second enclosure in contact with the circumferential surface of the enclosure, and a hollow rectangular shape having a hollow interior, which has a swinging door on one side, and one side of the third enclosure or the first enclosure. It consists of a fourth housing that can be attached to or detached from the first housing or the third housing in contact with the circumferential surface of the first housing, the first housing is equipped with a bus bar capable of receiving a high voltage current of 22.9kV The second housing is equipped with a load becomes a load switch and a transformer for instruments and a lightning arrester, and the third enclosure, the vacuum circuit breaker is equipped with a relay and a composite, wherein the fourth housing is equipped with a current transformer for instruments.

In addition, the instruments provided inside the enclosure may be connected to the busbar, and the instruments installed inside each enclosure may be interconnected through a busbar crossing between the enclosures through wall through bushings.

In addition, the busbars used in the first housing, the second housing, the third housing, and the fourth housing include copper coated on aluminum and maximized current flowing through the busbar using silver plated busbars. The lower part of any one of the enclosure, the second enclosure, the third enclosure, or the fourth enclosure is equipped with an inundation detection unit capable of determining whether water of a predetermined level has flowed into the space in which the present invention is installed, and the first to fourth enclosures. It is equipped with a polluting gas discharge device to discharge the polluting gas introduced into each enclosure to the outside.

The closed switchgear according to the present invention having such a structure can be separated into four in a completed state, and then moved to another place to be reassembled, so that the movement and reassembly is easy and the reassembly time can be shortened. There is this.

In addition, each space is partially divided to reduce the ripple effect in the event of an accident, and by installing a wall through bushing on the outer circumferential surface of the busbar penetrating each enclosure, an insulation effect between the busbar and the enclosure can be expected.

In addition, the lower part of any one of the first to fourth enclosures is equipped with an inundation detection unit that can detect the inundation has the effect of preventing the flooding accident of the switchboard in advance.

The closed switchgear according to the present invention having such a structure can be separated into four in a finished state, and then moved to another place, thereby making it easy to move and reassemble and shorten the reassembly time. .

In addition, each space may be partially divided, and then partitioned into partitions or the like, thereby reducing the ripple effect in the event of an accident.

In addition, insulation can be maintained between the busbar and the enclosure by applying wall-through bushings to the outer circumferential surface of the busbar across the two or more enclosures.

In addition, the lower circumferential surface of any one of the first to fourth enclosures is equipped with an inundation detection unit that can detect the inundation to prevent the flooding accident of the switchboard in advance, the busbar applied to the present invention is made of aluminum At the same time copper is coated, silver is plated, resulting in cost savings and increased productivity.

In addition, trivalent chromium is applied to the circumferential surface of the bolt connecting the gauge provided in the busbar or switchboard provided in the present invention, which has the advantage of being more environmentally friendly than conventional hexavalent chromium.

In addition, the upper surface of the first to fourth enclosures provided in the present invention is equipped with a pressure-resistant safety device can be discharged to the outside of the first to fourth enclosures high pressure gas generated from the first to fourth enclosures. Make sure

In addition, the present invention has an advantage that the pollutant gas discharge device is provided can always be filled with fresh air inside the first to fourth enclosures.

In addition, the present invention is provided with air cooling means that can lower the internal temperature of the closed switchboard in accordance with the internal temperature of the closed switchboard, it is possible to always maintain the internal temperature of the closed switchboard at a constant temperature.

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

1 is a front view of a closed switchgear according to the present invention, FIG. 2 is a rear view of a closed switchgear according to the present invention, FIG. 3a is a front view of a first enclosure provided in the present invention, and FIG. 3b is provided with the present invention. Side view of the first housing.

4 is a view for explaining the first embodiment of the wall through bushing, FIG. 5A is a front view of the second embodiment of the wall through bushing, and FIG. 5B is a side view of the second embodiment of the wall through bushing 6 is a front view of a second enclosure provided in the present invention.

In addition, Figure 7 is a side view of a second enclosure provided in the present invention, Figure 8 is a side view of a third enclosure provided in the present invention, Figure 9 is a disconnected wiring diagram of a closed switchboard according to the present invention, Figure 10 It is a front view of the 4th enclosure equipped in this invention.

11 is a side view of a fourth housing provided in the present invention, FIG. 12 is a plan view of a closed switchboard according to the present invention, FIG. 13 is an enlarged view of a level sensor provided in the present invention, and FIG. An air tube fitted to the inlet and outlet of the enclosure facing the inner side.

FIG. 14B is an enlarged view of the air tube inserted into the inlet and outlet of the enclosure which is in contact with the inner surface of the swing door, FIG. 15 is a system diagram of the polluting gas discharge device provided in the present invention, and FIG. 16 is an exhaust gas provided in the present invention. It is a longitudinal cross-sectional view of a damper, and FIG. 17 is a longitudinal cross-sectional view of the air cooling means equipped with this invention.

18 is a ladder diagram for explaining a process in which an air supply device, an exhaust device, or an air cooling means is operated depending on whether the door is opened or closed.

As shown in these figures, the closed switchgear according to the present invention has a hollow rectangular shape inside, a first housing 1 having a hinged door on one side, and a hollow rectangular shape inside the hollow switchboard. A second door (3) detached and attached to the first housing (1) in a state in which a sliding door is provided and one side is in contact with the circumferential surface of the first housing (1), and a hollow rectangular shape inside A third door 5 is provided at one side and can be attached to or detached from the second housing 3 while the side door is in contact with the circumferential surface of the second housing 3, and the inside is hollow. In the form of a rectangular parallelepiped, a hinged door is provided on one side, and one side of the first housing 1 or the third housing 5 is brought into contact with the peripheral surface of the third housing 5 or the first housing 1. It consists of the 4th enclosure 7 which can be attached and detached.

As shown in FIGS. 3A and 3B, the first housing 1 includes a bus bar 9a capable of receiving a high voltage of 22.9 kV supplied from KEPCO, and the bus bars 9a each have a bus bar 9a. R phase, S phase, and T phase can be supplied with electricity.

In addition, it is preferable that each bus bar 9a provided in the first housing 1 is provided with an insulating pipe 11 protruding from the inner circumferential surface of the first housing 1 to a predetermined length.

In addition, the busbar 9a provided in the first enclosure 1 may be connected to the second enclosure 3 through a wall through bushing 13a passing through the first enclosure 1 and the second enclosure 3. Bar wall bushing (13a) is, as shown in the first embodiment shown in Figure 4, both sides are open, the inside of the hollow cylindrical shape, the inner cylinder and the outer cylinder and the concentric cylinders are piled up It can be made of an insulating member of the epoxy mold material.

In addition, the wall through bushing (13a), as shown in the second embodiment shown in Figures 5a and 5b, two or more square holes so that the bus bar (9) can be penetrated through a flat plate made of an epoxy mold material ( 14 may be achieved by constructing a rectangular projection jaw 16 in the outer circumferential direction of the square hole 14.

In the second embodiment of the wall through bushing 13b having the above structure, the second embodiment of the wall through bushing 13b is integrally inserted into the peripheral surfaces of the first to fourth enclosures 7. After the through-holes may be drilled, the second embodiment of the wall-through bushing 13b may be integrally inserted into the through-holes, and the wall-through bushings may be formed by using bolts and nuts made of an insulating member, if necessary. The second embodiment of (13b) can also be coupled to the first to fourth enclosures 7.

Meanwhile, as shown in FIGS. 6 and 7, the second enclosure 3 is connected to each of the busbars 9a inserted through the wall through bushing 13a from the first enclosure 1 so that the booth is connected to the second enclosure 3. A load load switch 15 (LBS) capable of opening or closing the power delivered from the bar 9a to the load or preventing a short circuit accident is mounted.

In addition, an arrester 17 is mounted at the rear end of the load load switch 15 provided in the second enclosure 3 to safely ground the surge voltage exceeding a predetermined intensity.

Thus, the arrester 17 can protect a plurality of instruments mounted on the load load switch 15.

In addition, at the rear end of the arrester 17 provided in the second enclosure 3, the high voltage or high current electricity input through the arrester 17 is lowered to a predetermined level, and then the voltage and current input from each line are reduced. It is equipped with an instrument transformer 19 for checking.

At this time, the bus bar 9b is connected between the bus bar 9a and the load load switch 15 and the lightning arrester 17 and the instrument transformer 19 which are input from the first enclosure 1, and thus the first enclosure ( It is possible to transfer the high voltage electricity input through 1) to each device, the bus bar (9a, 9b) may be coupled by two or more by bolts or nuts.

On the other hand, as shown in Figure 9, the instrument transformer 19 is equipped with a maximum receiving power meter 21 (DM) capable of displaying the maximum received power amount, and a reactive power meter that can display the reactive power (23) (VAR) is preferably mounted.

Meanwhile, as shown in FIG. 8, electricity of the R phase, the S phase, and the T phase whose characteristics are changed through the instrument transformer 19 is transferred back to the third enclosure 5 through the bus bar 9c. On the circumferential surface where the second housing 3 and the third housing 5 face each other, a wall through which a bus bar 9c extending from the instrument transformer 19 to the third housing 5 can pass therethrough. Bushings are preferably installed.

In addition, the bus bar 9c extending to the third enclosure 5 through the wall through bushing is connected to a vacuum breaker 25 (VCB) as shown in FIGS. 8 and 9, The R, S and T phase electric lines passing through the vacuum breaker 25 are transferred to the fourth housing 7 through the busbars 9d extending from the vacuum breaker 25.

At this time, the bus bar 9d extending to the fourth housing 7 penetrates through the third housing 5 and the fourth housing 7 and insulates electricity flowing from the bus bar 9d. Preferably, a wall through bushing 13b is provided.

In addition, as shown in FIG. 9, a composite relay of Patent Registration No. 10-0597088, to which the inventor has applied for a patent, is connected to the vacuum circuit breaker 25 (VCB) provided in the third housing 5 in parallel. It allows you to monitor power distribution equipment failures and monitor power status remotely.

In addition, a transformer 29 is provided between the front end of the vacuum breaker 25 and the composite relay 27 to reduce the voltage input from each line to a predetermined level, and is provided at both ends of the transformer 29. A fuse 31 may be installed to prevent the flow of transient current, and a PTT 33 may be installed between the transformer 29 and the composite relay 27.

In addition, the vacuum circuit breaker 25 and the composite relay 27 provided in the third enclosure 5 are divided by partition walls, respectively, so that an accident occurring in the vacuum circuit breaker 25 installation section occurs in the installation section of the composite relay 27. Do not enlarge it.

In addition, as shown in FIGS. 9, 10, and 11, the fourth housing 7 is connected between the rear end of the vacuum circuit breaker 25 (VCB) and the composite relay 27 to connect the vacuum circuit breaker 25. An instrument current transformer 35 capable of converting current flowing through the current to a predetermined level is mounted, and a CTT 37 is mounted between the instrument current transformer 35 and the composite relay 27.

On the other hand, the bus bar applied to the present invention is formed by coating a copper bar 20% of the weight of the aluminum on the bus bar made of aluminum, and then additionally plated silver on the copper coated aluminum.

In addition, it is preferable that the discoloration preventing agent is coated on the circumferential surface of the silver-plated bus bar so that the plated silver is not discolored.

The bus bar having such a structure can increase the allowable current applied to the bus bar by 15% when designing a copper bus bar replacement, reduce the production cost by 20% in the case of small quantity production, and reduce the production cost in the case of mass production. This has the advantage of reducing%.

Meanwhile, the bolt fastened to the busbar is made of a low carbon martensitic steel material having a tensile strength of 2.5 times or more than that of conventional carbon steel, thereby improving torque properties of the bolt, and corrosion of trivalent chromium on the circumferential surface of the bolt. The inhibitor is applied.

At this time, the low carbon martensitic steel can reduce the wear phenomenon of the bolts made of the conventional stainless steel by the assembly tool, the corrosion inhibitor of the trivalent chromium is environmentally friendly than the conventional corrosion inhibitor made of hexavalent chromium exported to Europe This has the advantage of being easy.

In addition, the bolt head to be applied to the present invention is equipped with a temperature measuring member for detecting the tightening state and abnormal heat of the bolt, the temperature measuring member can be used a conventional temperature conversion planetary magic pen.

The temperature conversion planetary magic pen can change from red to yellow when heat is detected above 65 degrees, allowing the administrator to easily check the condition of the equipment.

In addition, the upper surfaces of the first housing 1, the second housing 3, and the third housing 5 and the fourth housing 7 are located on the upper surfaces of the first housing 1 or the first housing 1 as shown in FIG. 2 The gas pressure generated by an internal accident in the enclosure 3, or the third enclosure 5 or the fourth enclosure 7 can be used for the first enclosure 1, the second enclosure 3, or the third enclosure 5; (B) A pressure relief device capable of discharging in the outward direction of the fourth enclosure (7) to protect the system provided in the first enclosure (1) to the fourth enclosure (7) and ensure the safety of the manager adjacent to the switchboard ( 43) are installed.

The pressure relief device 43 is typically configured to form a gas discharge hole in the first to fourth housings (7), and has a safety cap with one side open to the gas discharge hole. Can be.

On the other hand, the lower end of the first enclosure 1, the second enclosure (3), the third enclosure (5) or the fourth enclosure (7), as shown in Figures 1, 2 and 13, the present invention The inundation detection unit 45 is installed to check whether water with a certain level is filled in the installed space, and when a certain level of water is filled into the space where the present invention is installed, a warning message to an administrator who manages the present invention. To be delivered.

In addition, in the present invention, when the electrical signal that the water of a certain level is filled in the present invention from the inundation detection unit 45, the communication system that can notify the administrator of the inundation using wired and wireless communication This can be equipped.

In addition, inlet and outlet 46 of the first housing 1 to the fourth housing 7 facing the inner surface of the swing door provided in the first housing 1 to the fourth housing 7 are shown in Figs. 14A and 14B. As shown, the air tube 48 made of a rubber material is fitted along the edge of the inlet and outlet 46 to prevent inflow of corrosive gas or moisture that may cause internal corrosion between the door and the inlet and outlet 46.

In addition, the first housing (1) to the fourth housing (7) provided in the present invention is equipped with a polluting gas discharge device 47 so as to discharge the polluted air filled inside the present invention to the outside, The polluted gas discharge device 47 is described with reference to FIG. 15 as follows.

As illustrated in FIG. 15, the pollutant gas discharge device 47 compresses an air compressor 49 that receives and compresses fresh air from the outside, and compresses fresh air delivered from the air compressor 49 in a closed space. Then, a compressed air storage tank 51 capable of storing, an air dryer capable of lowering the temperature of the compressed air delivered from the compressed air storage tank 51 to a predetermined level, and removing moisture contained in the compressed air ( 53), and a pressure regulator 55 for lowering the pressure of the air discharged through the air dryer 53 to a predetermined level.

In addition, the pressure regulator 55 includes a compressed air delivered to the pressure regulator 55 according to a predetermined time interval or whether or not the opening door provided in the first to fourth enclosures 7 is opened or closed. An air supply control device 57 capable of delivering to the first to fourth enclosures 7 is mounted, and the air supply control device 57 is provided with air flowing into the first to fourth enclosures 7. Preferably, the air supply valve 58 is mounted to selectively shut off.

In addition, the air supply control device 57 uses a flexible insulation tube 59 made of an insulating material extending from the air supply control device 57 to the respective boxes so as to provide compressed air to each housing.

In addition, a silencer 62 is provided at the front end of the flexible insulation tube 59 inserted into the first to fourth housings 7 to reduce noise of the air discharged from the flexible insulation tube 59. It is preferably mounted.

Meanwhile, as shown in FIG. 15, a flexible insulating tube 59 extending from the air supply control device 57 is disposed on the circumferential surface of the first to fourth housings 7 to the first housing 1. One-touch fittings 61 that can be easily connected to the fourth enclosure 7 can be mounted.

In addition, the polluted gas discharged by the polluted gas discharge device 47 may be exhausted by an exhaust damper 60 mounted on the circumferential surface of the enclosure.

As illustrated in FIG. 16, the exhaust damper 60 receives the gas generated from the first housing 1 to the fourth housing 7 in the height direction of the exhaust damper 60. 4 is equipped with an exhaust fan 63 capable of discharging in the outward direction of the enclosure 7 and a noise isolation to be mounted on the upper end of the exhaust fan 63 and to reduce the exhaust noise of the gas discharged from the exhaust fan 63. Mounted on top of the filter (65) and the noise blocking filter (65) and at the same time lying down or standing by the solenoid drive device (67), the switch (69) capable of opening or closing the outlet of the exhaust damper (60). It can be made of).

On the other hand, the process of opening and closing the switch 69 by the solenoid drive device 67 is already known in the application number "10-1997-0050254".

In addition, the inside of the first housing (1) to the fourth housing (7) provided in the present invention air that can quickly cool the gas heated in the first housing (1) to the fourth housing (7) Cooling means 71 is mounted, as shown in Figure 17, the air cooling means 71 is a three-dimensional shape hollow inside, one side of the first housing (1) to the fourth housing (7) May face the inner circumferential surface of the substrate.

In addition, the inner side of the air cooling means 71 may be divided into a first compartment 73 and a second compartment 75 by partitions, and two corners of the first compartment 73 are cooled from outside of the closed switchgear. Cooled air intake hole 77 capable of receiving air, and air heated from the cooling air intake hole 77 and received from the heat sink 76 of the first compartment 73 is warmed out of the closed switchgear. A gentle air discharge hole 79 capable of discharging is provided.

In this case, the cooling air suction fan 80 receives cool air from the outside of the closed switchboard and then discharges the cold air through the first compartment 73 to the gentle air discharge hole 79. It is preferred to be equipped.

On the other hand, the two corners of the second compartment (75) have a gentle air suction hole (83) for sucking air that has been heated in the first housing (1) to the fourth housing (7), and the gentle air suction hole (83) ) Is provided with a cooling air discharge hole (85) which can enter the first chamber (1) to the fourth housing (7) to cool the air that enters the second compartment (75) to take heat away from the heat sink (76) Lose.

At this time, air of a predetermined temperature flowing from the first to fourth housings 7 is discharged to the cooling air discharge hole 85 through the second compartment 75 in the gentle gas suction hole 83. It is preferable that a gentle air intake fan 87 be installed.

In addition, the first enclosure (1) to the fourth enclosure (7) may be equipped with an opening and closing detection unit that can determine whether the opening and closing doors provided in each enclosure, the interior of the first enclosure (1) to the fourth enclosure It can be equipped with a temperature sensor that can determine the temperature in real time.

In addition, the first and fourth housings 1 to 7 may open or close the air supply valve 58 or the exhaust damper 60 for a predetermined time depending on whether the door is open or closed. A timer may be mounted to drive or stop the exhaust fan 63.

The air supply valve 58 and the exhaust fan 63, the switch 69, the cooling air suction fan 80, and the gentle air suction fan 87, the operation of the timer according to whether the opening or closing door or temperature sensing unit A first embodiment of opening, closing, driving, and stopping according to the internal temperatures of the first to fourth enclosures 7 sensed in FIG. 18 will be described below with reference to FIG.

First, when the swing door provided in any one of the first housing (1) to the fourth housing (7) is opened, the opening and closing detection unit for detecting the opening or closing of the swing door is activated to operate the timer and air cooling means ( An electrical control signal is transmitted to 71 that the door is open.

At this time, the air cooling means 71 receiving the electrical control signal that the opening door is opened from the opening and closing detection unit to stop the cooling air suction fan 80 and the gentle air suction fan 87 to suppress unnecessary electricity consumption. Can be.

In addition, the timer receiving the electrical control signal that the opening door is opened from the open / close detection unit restores the state of the timer to the initial setting state and at the same time stops the counter operation of the timer, closes the air supply valve 58 or exhaust fan 63 ) Can be stopped or the switch 69 is closed to suppress unnecessary electricity consumption in the state where the door is open.

On the other hand, when the door is closed, the open / close detection unit detects that the door is closed, and transmits an electrical control signal that the door is closed to the timer and the temperature sensor.

On the other hand, the timer received the electrical control signal that the door is closed from the opening and closing detection unit to operate the timer so that the air supply valve 58 or the exhaust fan 63 is driven at a predetermined time interval, Allow (69) to open.

In addition, the temperature sensing unit that receives the electrical control signal that the door is closed from the opening and closing detection unit currently detects the temperature inside the first housing (1) to the fourth housing (7) when the predetermined temperature is exceeded, the cooling air The suction fan 80 and the gentle air suction fan 87 are operated to quickly cool the air warmed inside the first to fourth enclosures 7.

The pollutant gas discharge device 47 having such a structure receives fresh air from the outside, and then supplies fresh air having the predetermined pressure to the first housing 1 to the fourth housing according to a predetermined time interval or whether the door is opened or closed. Can be supplied to (7).

Accordingly, the pollutant gas discharge device 47 prevents the switchboard from corroding due to corrosive polluting gas, and prevents corrosive gas from remaining in the first to fourth enclosures 7 to corrode internal devices.

Therefore, the closed switchboard according to the present invention has the advantage that the product can be separated into four in the completed state, and then moved to another place, easy to move and reassemble, and shorten the assembly time.

In addition, each space is partially divided to reduce the ripple effect in the event of an accident, and when the enclosure is connected through the busbar, by using a wall through bushing that can insulate the busbar, the insulation between the busbar and the enclosure You can expect the effect.

In addition, the lower end of any one of the first housing (1) to the fourth housing (7) is equipped with an inundation detection unit 45 for detecting the inundation has an effect that can prevent the flooding accident of the switchboard in advance. have.

1 is a front view of a closed switchboard according to the present invention;

2 is a rear view of the closed switchboard according to the present invention;

Figure 3a is a front view of the first enclosure provided in the present invention,

Figure 3b is a side view of the first housing provided in the present invention,

4 is a view for explaining a first embodiment of the wall through bushing,

5a is a front view of a second embodiment of a wall through bushing,

5b is a side view of a second embodiment of a wall through bushing,

6 is a front view of a second housing provided in the present invention;

7 is a side view of a second enclosure provided in the present invention;

8 is a side view of a third housing provided in the present invention;

9 is a disconnection diagram of a closed switchboard according to the present invention;

10 is a front view of a fourth housing provided in the present invention;

11 is a side view of a fourth housing provided in the present invention;

12 is a plan view of a closed switchboard according to the present invention;

13 is an enlarged view of a level sensor provided in the present invention;

14a shows an air tube fitted to the inlet and outlet of the enclosure facing the inner side of the swing door,

Figure 14b is an enlarged view of the air tube fitted to the inlet and outlet of the enclosure in contact with the inner surface of the swing door,

15 is a schematic diagram of a polluting gas discharge device according to the present invention;

16 is a longitudinal sectional view of an exhaust damper provided in the present invention;

17 is a longitudinal sectional view of the air cooling means according to the present invention;

18 is a ladder diagram for explaining a process in which an air supply device or an exhaust device or an air cooling means is operated depending on whether a door is opened or closed;

19 is a view showing an inner upper portion of a conventional closed switchboard;

20 is a plan view of a conventional closed switchboard,

* Description of symbols on the main parts of the drawings *

1. First enclosure 3. Second enclosure

5. Third enclosure 7. Fourth enclosure

9. Busbar 11. Insulation Lover

13. Wall through bushing 15. Load load switch

17. Lightning arrester 19. Instrument transformer

21. Maximum rated power meter 23. Reactive power meter

25. Vacuum breaker 27. Combined relay

29. Transformer 31. Fuse

33.PTT 35. Current transformer

37.CTT 39. Current transformer for instrument

43. Pressure relief safety device 45. Flood control

47. Pollutant gas discharge device 49. Air compressor

51. Compressed Air Storage Tank 53. Air Dryer

55. Pressure regulator 57. Supply control device

59. Flexible Insulation Tube 60. Exhaust Damper

63. Exhaust Fan 65. Noise Reduction Filter

67. Solenoid Drive 69. Switchgear

71. Air cooling means 73. First compartment

75. 2nd compartment 76. Heat sink

77. Cooling air intake hole 79. Warm air exhaust hole

80. Cooling air suction fan 83. Warm air suction hole

85. Cooling air exhaust hole 87. Warm air suction fan

Claims (3)

A hollow rectangular parallelepiped shape, the first housing having a hinged door on one side thereof; The second housing 3 having a rectangular parallelepiped shape, having a swinging door on one side, and detaching and attaching to the first housing 1 while one side is in contact with the circumferential surface of the first housing 1. ); A third housing having a hollow rectangular parallelepiped shape and having a opening door on one side thereof, and having one side contacting the circumferential surface of the second housing 3 and being detachable from and attached to the second housing 3 ( 5); And a hollow door having a hollow inside, and having a opening door at one side thereof, the one side of which is in contact with the circumferential surface of the third housing 5 or the first housing 1, or the first housing 1 or the third housing. Consisting of a fourth enclosure (7) detachable from and attached to (5): The first housing 1 is a bus bar (9a) for receiving a high voltage current of 22.9kV, It is provided with an insulation pipe 11 which protrudes from the inner circumferential surface of the first housing 1 to a predetermined length to support the bus bar 9a, The busbars 9a are supplied with R phase, S phase, and T phase, respectively, The busbar 9a provided in the first enclosure 1 is connected to the second enclosure 3 through a wall through bushing 13a passing through the first enclosure 1 and the second enclosure 3, The second enclosure 3 is connected to the busbar 9a inserted into the second enclosure 3 from the first enclosure 1 through the wall through bushing 13a and is transferred from the busbar 9a. A load load switch 15 (LBS) capable of opening or closing the power supply or preventing a short circuit accident between the respective lines; An arrester 17 mounted to a rear end of the load load switch 15 to safely ground a surge voltage exceeding a predetermined intensity; It is mounted on the rear end of the arrester 17 provided in the second housing 3 to lower the electricity of the high voltage and high current input through the arrester 17 to a certain level, and then check the voltage and current input from each line. Instrument transformer (19); A maximum capacity meter 21 mounted on the instrument transformer 19 to display a maximum capacity amount; And a reactive power meter 23 mounted on the instrument transformer 19 to display reactive power. Electricity of the R phase, S phase, and T phase whose characteristics are changed through the instrument transformer 19 is transferred to the third enclosure 5 through the busbar 9c. On the circumferential surface where the second housing 3 and the third housing 5 face each other, the wall bar bushings allow passage of the busbars 9c extending from the instrument transformer 19 to the third housing 5. Is installed, The third enclosure (5) includes a vacuum circuit breaker (25) connected to the busbar (9c) extending from the second enclosure (3) through wall through bushing; Is connected in parallel with the vacuum circuit breaker 25 is equipped with a composite relay 27 that can monitor the failure of the power distribution equipment and remotely monitor the power state, A transformer 29 is mounted between the front end of the vacuum breaker 25 and the composite relay 27 to reduce the voltage input from each line to a predetermined level. Both ends of the transformer 29 is equipped with a fuse 31 that can block the flow of transient current, PTT 33 is installed between the transformer 29 and the composite relay 27, The vacuum circuit breaker 25 and the composite relay 27 provided in the third enclosure 5 are respectively partitioned by partition walls so that accidents occurring in the vacuum circuit breaker 25 installation section do not extend to the composite relay 27 installation section. To avoid, The bus bar 9d extending through the vacuum breaker 25 extends again to the fourth housing 7 through the wall through bushing 13b. The fourth housing 7 includes an instrument current transformer 35 connected between the rear end of the vacuum circuit breaker 25 and the composite relay 27 to convert current flowing through the vacuum circuit breaker 25 to a predetermined level. Fitted, Between the instrument current transformer 35 and the composite relay 27 is equipped with a CTT (37), The wall-through bushing is a cylindrical shape with both sides open and empty inside, and the inner side is made of an insulating member made of epoxy mold material in which a cylinder forming a concentric circle with an outer cylinder is stacked, or integrally formed on a flat plate made of an epoxy mold material. Two or more square holes 14 may be provided to allow the bus bar 9 to penetrate therethrough, and may be changed to a structure in which a square protruding jaw 16 is provided in an outer circumferential direction of the square hole 14. The busbars used for the first enclosure 1, the second enclosure 3, and the third enclosure 5 and the fourth enclosure 7 are coated with 20% of the aluminum weight of copper on an aluminum busbar. Then, additionally plated silver on the copper-coated aluminum, the discoloration preventing agent is applied so that the plated silver is not discolored on the silver plated circumferential surface, Bolts used for the first and second enclosures (3) and the third and fifth and fourth enclosures (7) are made of low carbon martensitic steel materials having a tensile strength of 2.5 times or more than conventional carbon steels. It consists of On the circumferential surface of the bolt is applied a corrosion inhibitor made of trivalent chromium, The bolt head is equipped with a temperature measuring member for detecting the tightness of the bolt and abnormal heat generation, As the temperature measuring member, when a heat of 65 degrees or more is detected, a temperature conversion planetary magic pen that can be converted from red to yellow is used. The upper surface of the first enclosure 1, the second enclosure 3, the third enclosure 5, and the fourth enclosure 7 may include the first enclosure 1, the second enclosure 3, or the first enclosure. 3 The gas pressure generated by an internal accident in the enclosure 5 or the fourth enclosure 7 is applied to the first enclosure 1, the second enclosure 3, or the third enclosure 5 or the fourth enclosure 7. Equipped with a pressure-resistant safety device (43) that can be discharged in the outward direction to protect the system provided in the first housing (1) to the fourth housing (7), and to ensure the safety of the manager adjacent to the switchboard, The pressure relief device 43 is configured to form a gas discharge hole in the first to fourth housings 7 and 7 to cover the gas discharge hole with a safety cap having one side open. Closed switchboard. The method of claim 1, At the lower end of the first enclosure (1), the second enclosure (3), the third enclosure (5) or the fourth enclosure (7), the submerged water to determine whether the water of a certain level is filled in the space in which the closed switchboard is installed Detection unit 45 is mounted, The flooding detection unit 45 is equipped with a communication system that can notify the administrator of the flooding using wired / wireless communication when an electrical signal is generated from the flooding detection unit 45, Edges of the inlet and outlet 46 are formed at the inlet and outlets 46 of the first and the first housings 1 to 4, which face the inner side surfaces of the swing doors provided in the first and fourth housings 1 to 7. Accordingly, the air tube 48 made of a rubber material is inserted to prevent inflow of corrosive gas or moisture that may cause internal corrosion between the door and the inlet and outlet 46. The first housing 1 to the fourth housing 7 is provided with a polluting gas discharge device 47 so as to discharge the polluted gas filled in the first housing (1) to the fourth housing (7), The polluting gas discharge device 47 includes an air compressor 49 for receiving and compressing fresh air from the outside; A compressed air storage tank 51 capable of compressing fresh air delivered from the air compressor 49 into a closed space and then storing the fresh air; An air dryer (53) capable of lowering the temperature of the compressed air delivered from the compressed air storage tank (51) to a predetermined level and removing moisture contained in the compressed air; A pressure regulator 55 capable of lowering the pressure of the air discharged through the air dryer 53 to a predetermined level; Compressed air delivered to the pressure regulator 55 is mounted on the pressure regulator 55 according to a predetermined time interval or opening or closing of the swing door provided in the first to fourth enclosures 5 and 5. An air supply control device 57 for transmitting to the first to fourth enclosures 7; And a flexible insulating tube 59 made of an insulating material which is mounted to the air supply control device 57 and extends from the air supply control device 57 to each housing so as to provide compressed air to each housing. The air supply control device 57 is equipped with an air supply valve 58 to selectively block the air flowing into the first housing 1 to the fourth housing (7), A silencer 62 is mounted on the front end of the flexible insulation tube 59 inserted into the first to fourth housings 7 to reduce noise of the air discharged from the flexible insulation tube 59. , The flexible insulating tube 59 extending from the air supply control device 57 is simply connected to the first to fourth housings 7 on the circumferential surface of the first to fourth housings 7. Equipped with one-touch fittings (61), The polluted gas discharged by the polluted gas discharge device 47 is discharged by the exhaust damper 60 provided on the circumferential surface of the enclosure, The exhaust damper 60 is a gas generated from the first housing 1 to the fourth housing 7 in the height direction of the exhaust damper 60 to the outside of the first housing 1 to the fourth housing 7. An exhaust fan 63 which can be discharged to Noise blocking filter 65 that is mounted on the top of the exhaust fan 63 and at the same time can reduce the discharge noise of the gas discharged from the exhaust fan 63, And it is mounted on the top of the noise cut filter 65 and at the same time lying down or standing by the solenoid drive device 67, and the switch 69 to open or close the outlet of the exhaust damper 60, Inside the first housing (1) to the fourth housing (7) there is an air cooling means (71) capable of quickly cooling the gas heated in the first housing (1) to the fourth housing (7) Mounted, The air cooling means 71 is a three-dimensional shape hollow inside, one side of the air cooling means 71 may be in contact with the inner peripheral surface of the first housing (1) to the fourth housing (7), An inner side of the air cooling means 71 may be divided into a first compartment 73 and a second compartment 75 by a partition wall, At two corners of the first compartment 73, a cooling air suction hole 77 for receiving cool air from the outside of the closed switchboard; It is provided with a gentle air discharge hole (79) capable of discharging the warmed air received from the cooling air intake hole (77) and the heat transmitted from the heat sink (76) of the first compartment (73) to the outside of the closed switchboard, The cooling air intake fan (80) is installed in the cooling air intake hole (77) so as to receive cool air from the outside of the closed switchgear and then discharge it through the first compartment (73) to the gentle air discharge hole (79). , Two corners of the second compartment (75) are provided with a gentle air suction hole (83) for sucking air that has been heated in the first to fourth enclosures (7), Cooling air that enters the mild air intake hole 83 and takes heat away from the heat sink 76 of the second compartment 75 and blows the cooled air back into the first to fourth enclosures 7. The discharge hole 85 is equipped, In the mild air intake hole 83, air of a predetermined temperature flowing from the first to fourth enclosures 7 may be discharged through the second compartment 75 to the cooling air discharge hole 85. Closed switchgear, characterized in that the gentle air suction fan (87) is installed. The method of claim 2, The first and fourth housings 1 to 7 are equipped with an opening and closing detection unit that can determine whether the opening and closing doors provided in each enclosure, After the temperature inside the first enclosure (1) to the fourth enclosure (7) is grasped in real time, a temperature sensing unit capable of operating the air cooling means (71) is mounted. Depending on whether the door is open or closed, it is possible to open or close the air supply valve 58 or the actuator 60 for a predetermined time, and is equipped with a timer for driving or stopping the exhaust fan 63. Closed switchboard.

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