CN209860412U - Switch cabinet - Google Patents

Abstract

The utility model discloses a switch cabinet, the intelligent cabinet temperature adjusting device comprises a cabinet body, internal relay instrument room and the hyperbaric chamber of having of cabinet, be provided with first circuit breaker, current transformer, earthing switch in the hyperbaric chamber, the leading-out terminal of first circuit breaker is connected with current transformer's inlet wire end, current transformer's leading-out terminal is connected with earthing switch, first circuit breaker is located a tip along first direction in the hyperbaric chamber, earthing switch locates follow in the hyperbaric chamber the middle part of first direction, current transformer locates another tip along first direction in the hyperbaric chamber, direction about the first direction perpendicular to. According to the utility model discloses cubical switchboard, the separation of high-low pressure room, the electric elements in the high-pressure chamber is arranged rationally moreover, and stability is high.

Description

Switch cabinet

Technical Field

The utility model relates to an electrical equipment technical field, in particular to cubical switchboard.

Background

The switch cabinet is an electrical device, the external line of the switch cabinet firstly enters a main control switch in the cabinet and then enters a branch control switch, and each branch is arranged according to the requirement. The main function of the switch cabinet is to open and close, control and protect the electric equipment in the process of generating, transmitting, distributing and converting electric energy in the electric power system. The switch cabinet is widely applied to various occasions such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light textile industry, factories and mines, residential districts, high-rise buildings and the like.

In an urban rail transit power supply system, a 10kV medium-voltage switch cabinet is a distribution switch device used for receiving and distributing electric loads. However, the components and parts are arranged unreasonably in the existing medium-voltage switch cabinet, and the cabinet body is too high and is usually 2200-2400 mm.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cubical switchboard, components and parts are arranged rationally in the cubical switchboard, and stability is high.

According to the utility model discloses switch cabinet, the intelligent cabinet temperature adjusting device comprises a cabinet body, internal relay instrument room and the hyperbaric chamber of having of cabinet, be provided with first circuit breaker, current transformer, earthing switch in the hyperbaric chamber, the leading-out terminal of first circuit breaker is connected with current transformer's inlet wire end, current transformer's leading-out terminal is connected with earthing switch, first circuit breaker is located a tip along first direction in the hyperbaric chamber, earthing switch locates follow in the hyperbaric chamber the middle part of first direction, current transformer locates along another tip of first direction in the hyperbaric chamber, direction about the first direction perpendicular to.

According to the utility model discloses cubical switchboard, the separation of high-low pressure room, the electric elements in the high-pressure chamber arranges the compactness moreover for the whole size of cubical switchboard can design littleer.

In addition, according to the utility model discloses cubical switchboard of above-mentioned embodiment can also have following additional technical characterstic:

in some embodiments, the cabinet comprises: the first door is used for opening and closing the relay instrument chamber, and a plurality of first electric elements are integrated on the first door.

In some embodiments, a second electrical element is disposed in the relay instrument chamber, and the first electrical element and the second electrical element are electrically connected.

In some embodiments, a detachable grid plate is fixed in the relay instrument chamber, and the grid plate is used for fixedly mounting the second electrical element located in the relay instrument chamber.

In some embodiments, the first electrical component comprises at least one of a microcomputer integrated protection device, a live display device, a multifunctional box, a transfer switch, an indicator light and a switching pressure plate.

In some embodiments, the second electrical component comprises at least one of a second circuit breaker, a terminal block, and a light.

In some embodiments, a wall bushing is disposed on a side wall of the high-voltage chamber, an upper branch busbar of the first circuit breaker is connected to a main busbar penetrating through the wall bushing, a first strip sensor is disposed in the high-voltage chamber, the first strip sensor is connected to the main busbar, and the first strip sensor supports the main busbar.

In some embodiments, the inner space of the cabinet is divided into the relay instrument chamber and the high-pressure chamber by a partition, and the first belt sensor is mounted on the partition.

In some embodiments, the condensation controller is further included, a heater is installed in the high-pressure chamber, and the condensation controller controls the heater through signal transmission.

In some embodiments, the cabinet further comprises: the second door is used for opening and closing the high-pressure chamber, and an observation window is arranged on the second door.

In some embodiments, the viewing window has an open state and a closed state.

In some embodiments, the inner space of the cabinet is partitioned by a partition extending in the left-right direction and connected between the left and right side plates of the cabinet, and the relay meter chamber is formed between the front portion of the top plate of the cabinet and the partition.

In some embodiments, the partition includes a vertical limb extending in an up-down direction and a horizontal limb extending in a front-rear direction, an upper end of the vertical limb is adjacent to or connected to the top plate, a rear end of the horizontal limb is adjacent to or connected to a lower end of the vertical limb, and the horizontal limb and the top plate are spaced apart by a predetermined distance to form the relay instrument chamber.

In some embodiments, the opening of the relay instrument room and the opening of the high-pressure chamber are both arranged on the front side of the cabinet body, and the opening of the relay instrument room is higher than the opening of the high-pressure chamber.

In some embodiments, the first circuit breaker is disposed at a front portion of the high voltage chamber, the current transformer is disposed at a middle portion of the high voltage chamber, and the current transformer is disposed at a rear portion of the high voltage chamber.

In some embodiments, the top end of the high pressure chamber is provided with a pressure relief plate, and the pressure relief plate is provided with dense micropores.

Drawings

Fig. 1 is a schematic diagram of a switch cabinet according to an embodiment of the present invention.

Fig. 2 is a front view of a switchgear cabinet according to an embodiment of the present invention.

Fig. 3 is a right side view of a switch cabinet according to an embodiment of the present invention

Fig. 4 is a left side view of a switch cabinet according to an embodiment of the present invention.

Fig. 5 is a top view of a switch cabinet according to an embodiment of the present invention.

Reference numerals: the switch cabinet comprises a switch cabinet 100, a first door 1, a second door 2, a first circuit breaker 4, a grounding copper bar 5, an arrester 6, a grounding switch 7, a current transformer 9, a branch busbar 10, a lifting lug 11, a pressure relief plate 12, a partition plate 13, a vertical limb 131, a horizontal limb 132, an inclined limb 133, a flanging 134, a grid plate 14, a microcomputer comprehensive protection device 15, a multifunctional meter 16, a charged display 17, a main wiring schematic diagram 18, a condensation controller 19, an indicator lamp 20, a first door lock 21, a switching pressure plate 22, an observation window 23, a third door lock 24, a second door lock 25, a change-over switch 26, a second circuit breaker 27, a terminal bank 28, a first charged sensor 29, a wall bushing 30, a heater 31, a cabinet body 32, a left side plate 321, a right side plate 322, a top plate 323 and a bottom plate 324.

Detailed Description

The utility model discloses an inventor discovers through inventor research and analysis, present cubical switchboard generally includes the cabinet body, install the components and parts (like circuit breaker, mutual-inductor etc.) of various functions in the cabinet body, horizontal bus, vertical bus, communication device and communication cable etc., components and parts, horizontal bus, vertical bus, communication device and communication cable etc. all install in same cavity, do not separate and come, lead to the function device, horizontal bus, the produced magnetic field of electric current in the vertical bus causes serious influence to communication device, communication cable, mutual interference is serious, the security of low-voltage switchgear has been reduced. In addition, components, horizontal buses, vertical buses, communication devices, communication cables and the like are mixed together, so that the maintenance and the overhaul are quite troublesome, and misoperation is easily caused. In addition, in the urban rail transit power supply system, the 10kV medium-voltage switch cabinet is a distribution switch device for receiving and distributing electric loads, however, in the 10kV medium-voltage switch cabinet in the current market, the cabinet body is divided into a plurality of chambers, and the main components therein include a circuit breaker, a current transformer, a grounding switch, a zero sequence CT, a live display, a lightning arrester, a bus, a grounding copper bar, an interlocking mechanism, etc., and the structure is complex, the integration level is not high, so that the height of the cabinet body is increased, generally 2200-2400mm, and the depth of the cabinet is generally 1600-2000 mm, which results in that the switch cabinet occupies a large area, occupies a large clear height, and is difficult to adapt to places with limited height and depth.

To above-mentioned reason, utility model people improved current cubical switchboard and its cabinet body, solved the partial technical problem who exists among the correlation technique.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Combine fig. 1 to fig. 5, according to the utility model discloses cubical switchboard 100, including the cabinet body 32, the internal relay instrument room and the hyperbaric chamber of having of cabinet are provided with first circuit breaker 4, current transformer 9, earthing switch 7 in the hyperbaric chamber, and the leading-out terminal of first circuit breaker 4 is connected with current transformer 9's inlet wire end, and current transformer 9 leading-out terminal is connected with earthing switch 7.

According to the utility model discloses cubical switchboard 100, cubical switchboard 100's inner space is divided into relay instrument room and hyperbaric chamber, and the separation of high-low pressure room, the electric elements in the hyperbaric chamber arrange the compactness moreover for the whole size of cubical switchboard can design littleer.

The first breaker 4 can be a vacuum breaker and can be used for switching on and off the current of the normal work of the main loop, when the loop breaks down, the microcomputer comprehensive protection device sends a tripping command to the first breaker after detecting the fault current or voltage, and the first breaker trips and cuts off a fault area. The current transformer is used for collecting analog current of the primary high-voltage loop. The high-voltage large current of the primary loop is detected, converted into low-voltage small current of the secondary loop through the transformation ratio of the current transformer, and output to the microcomputer comprehensive protection device and the multifunctional meter. The earthing switch is used for protecting and earthing when the equipment is overhauled, and personal safety when overhauling is guaranteed. Optionally, the outlet end of the current transformer is connected with the fixed contact of the grounding switch 7, and the outlet at the lower end of the fixed contact of the grounding switch 7 is connected with the lightning arrester 6.

Further, referring to fig. 1 and 3, the first circuit breaker 4 is disposed at one end of the high voltage chamber along the first direction, the grounding switch 7 is disposed at the middle of the high voltage chamber along the first direction, and the current transformer 9 is disposed at the other end of the high voltage chamber along the first direction, which is perpendicular to the up-down direction. The first direction may be a front-back direction, a left-right direction, or another direction perpendicular to the up-down direction.

The first circuit breaker 4, the current transformer 9, and the ground switch 7 are respectively disposed at both end portions and a middle portion of the cabinet 32 in the first direction. Because the first circuit breaker 4, the grounding switch 7 and the current transformer 9 are main bearing parts of the switch cabinet 100, the gravity center of the cabinet body is more reasonable and the stress is more uniform through a dispersed arrangement mode, so that the cabinet body is favorable for hoisting and field installation, and the stability of the switch cabinet 100 is effectively improved.

Taking the first direction as the front-rear direction as an example, the first circuit breaker 4 is disposed at the front of the high-pressure chamber, the grounding switch 7 is disposed at the middle of the high-pressure chamber, and the current transformer 9 is disposed at the rear of the high-pressure chamber. Of course, the first direction may be a left-right direction (the first circuit breaker 4 is disposed at the left portion of the high-pressure chamber, the grounding switch 7 is disposed at the middle portion of the high-pressure chamber, and the current transformer 9 is disposed at the right portion of the high-pressure chamber). The first direction may be another direction, for example, a direction having an angle of 45 ° with respect to the left-right direction and the front-back direction.

With reference to fig. 1 to 5, the cabinet includes: a first door 1. First room door 1 is used for switching relay instrument room, can be used for switching relay instrument room through first room door 1, when breaking down in relay instrument room, can maintain fast through opening first room door 1, moreover, in the assembling process, just can realize closing of relay instrument room through first room door 1, and convenient assembling just does benefit to the maintenance.

Referring to fig. 2, in some embodiments, a number (at least one) of first electrical components are integrated on the first door 1. Arrange first electrical component on first room door 1, reduced relay instrument indoor components and parts quantity effectively, first electrical component can conveniently be connected with relay instrument indoor components and parts moreover to can improve the integrated effect of cubical switchboard, and make things convenient for the electricity of components and parts support to be connected effectively. The utility model discloses with the low voltage component setting on first room door 1, conveniently look over, control cubical switchboard 100 to can in time discover and solve the trouble, improved cubical switchboard 100's stability effectively. In addition, the integration level on the first chamber door 1 is high, and the stability and the maintainability of the whole switch cabinet 100 are also good.

Optionally, a second electrical component is arranged in the relay instrument chamber, and the first electrical component is electrically connected with the second electrical component.

For example, a flexible cable may be used to electrically connect a first electrical component on the first door to a second electrical component in the relay chamber. Therefore, a bus bar room does not need to be additionally provided, and the structure of the switch cabinet 100 is simplified.

There are various ways for the first door 1 to open and close the relay instrument room, for example, the first door 1 opens and closes the relay instrument room by rotating, sliding, a combination of sliding and rotating, and the like.

For example, the first door 1 is rotatably connected to the body of the cabinet to open and close the relay instrument room. Through setting first room door 1 to the form that comes the switching relay instrument room through rotating, when being connected with the wire between first room door 1 and the components and parts in the relay instrument room, can play the effect of protection wire through rotating first room door 1 of switching.

The first door 1 can be fixed on the cabinet body by a first door lock 21, the left side of the first door 1 can be rotatably connected with the left side plate 321 of the cabinet body, the right side of the first door 1 can be locked and separated with the right side plate 322 of the cabinet body by the first door lock 21,

optionally, with reference to fig. 1 to fig. 3, a detachable grid plate 14 is fixed in the relay instrument room, the grid plate 14 is used to fixedly mount a second electrical component located in the relay instrument room, during the mounting process, the component may be mounted on the grid plate 14, and then the grid plate 14 is mounted in the relay instrument room, so that the integration of the component is improved, and the switch cabinet 100 is convenient to assemble and maintain.

The first electrical component may include at least one of a microcomputer integrated protection device 15, a live display device, a multifunctional box, a condensation controller 19, a transfer switch 26, an indicator light 20, and a switching press plate 22.

The microcomputer integrated protection device integrates the functions of protection, control, measurement, communication and state monitoring, and is used as the main protection of a feeder line loop. The charged display device is matched with the first charged sensor for use, and displays the charged state of the primary loop. The multifunctional meter monitors the voltage, current, power factor and the like of the primary loop. The condensation controller can detect the humidity of the environment where the equipment is located, and when the humidity reaches a certain value, the condensation controller starts the heater to heat and dehumidify, so that condensation of the equipment is prevented. The transfer switch may include at least one of an on/off transfer switch that controls the on and off of the circuit breaker through an electrical circuit and a remote/local transfer switch that can switch between the remotely operated and the locally operated electrical circuit. In addition, the indicating lamp is used for indicating the closing and opening positions of the circuit breaker, indicating the energy storage position of the circuit breaker, indicating the opening position of the grounding switch and the like. The switching pressure plate can be used for switching on and off the tripping circuit and the switching-in and switching-out of related functions.

Alternatively, the second electrical component may include at least one of a second circuit breaker 27, a terminal block 28, and a lighting lamp. The detachable grid plate 14 of the utility model is used for fixedly mounting a second breaker 27, a terminal strip 28, a lighting lamp and the like, and can be used for mounting wiring outside the cabinet, thereby facilitating secondary wiring inside the cabinet; the low-voltage chamber panel is highly integrated, and adopt the little generating line of cabinet top of flexible cable hookup to replace traditional KYN28 cabinet low-voltage chamber upper end in the cabinet, reduce the site operation degree of difficulty, reduce cabinet body 32 height.

The second circuit breaker 27 may be a miniature circuit breaker for switching on and off a power supply of the secondary circuit, and cutting off the secondary circuit when the secondary circuit is short-circuited or overloaded, so as to ensure normal use of the secondary equipment. The terminal block is used for communicating and converting the secondary line. The illumination lamp is used for illumination when the position of the grounding switch is observed.

Optionally, with reference to fig. 3 and 4, a wall bushing 30 is disposed on a sidewall of the high voltage chamber, the upper branch busbar 10 of the first circuit breaker 4 is connected to a main busbar passing through the wall bushing 30, a first strip sensor 29 may be disposed in the high voltage chamber, the first strip sensor may be connected to the main busbar, and the main busbar may be supported by the first strip sensor.

Specifically, the first belt sensor is attached to the separator. In other words, the partition 13 is provided with a first belt sensor 29 extending into the high pressure chamber, the main bus bar is connected to the first belt sensor 29, and the main bus bar is supported by the first belt sensor 29.

Additionally, the utility model provides a can also install other components and parts in the hyperbaric chamber, combine aforementioned embodiment, install core components and parts such as first circuit breaker 4 (for example vacuum circuit breaker), current transformer 9, first band sensor 29, earthing switch 7, arrester 6, generating line, ground copper bar 5 in the hyperbaric chamber. The branch busbar 10 on the first circuit breaker 4 is connected with the main busbar passing through the wall bushing 30. The support is strengthened through the first belt sensor 29 fixed on the side wall of the low-voltage chamber, the copper bar is stabilized, and damage to the electric force is reduced.

Wherein, electromotive force means: electrical equipment and current carrying conductors that are forced against each other when an electrical current flows through them. In normal operation, the electromotive force is not easily detected because of the small working current. When short-circuited, particularly at the moment when a rush current flows, the electromotive force is generated most, possibly causing deformation of the conductor or destruction of the electrical equipment.

In the application, the leading-out terminal of the first circuit breaker 4 is connected with the leading-in terminal of a current transformer 9 fixed on the rear side through a copper bar, the leading-out terminal of the current transformer 9 is connected with a static contact of a grounding switch 7 fixed on the middle side wall through a copper bar, and the leading-out terminal of the static contact of the grounding switch 7 is connected with an arrester 6 through a copper bar. All the primary elements in the cabinet are connected by copper bars, and the primary elements comprise main busbars (lines) and branch busbars (lines) which belong to the copper bars.

In addition, when the high voltage switch cabinet 100 runs for a certain time, certain ash falling from the air is formed on the surface of the insulating member, and when the humidity change or the temperature difference change in the air is large, the dew condensation phenomenon is formed on the surface of the insulating member with the ash falling, namely, the dew condensation is formed on the surface of the insulating member, and the insulation edge flashover discharge is generated. The occurrence of flashover discharge during operation is a major hazard to the safe operation of the switchgear 100. In the present application, the condensation controller 19 and the heater 31 are provided to heat and dehumidify the switch cabinet 100 to prevent condensation.

Particularly, the utility model discloses in, the cubical switchboard still includes condensation controller 19, installs heater 31 in the high-pressure chamber, condensation controller 19 and heater 31 signal transmission, in other words, the condensation controller passes through 19 signal transmission control heaters 31, can judge whether need start heater 31 to heat or remove the condensation through condensation controller 19.

Optionally, the condensation controller 19 is integrated on the first door. Optionally, the heater 31 is mounted on the side wall below the current transformer 9 in the high-pressure chamber.

In this application, can all be provided with the wire casing in the hyperbaric chamber both sides and communicate with each other with relay instrument room, and left and right side wire casing is used for components and parts secondary circuit such as first circuit breaker 4, current transformer 9, earthing switch 7, first band sensor 29, heater 31 to walk the line.

In some embodiments of the present invention, the cabinet further comprises: second room door 2, second room door 2 are used for the switching high-pressure chamber, can open and close the high-pressure chamber fast through second room door 2, conveniently maintain and install the inside component of high-pressure chamber, improve the efficiency of assembly.

Referring to fig. 1-3, in some embodiments, a viewing window 23 is provided on the second door 2. The internal state of the high-pressure chamber can be checked through the observation window. Alternatively, an explosion-proof glass is arranged in the middle of the second door 2 as the observation window 23,

in addition, the second door 2 may also be rotatably connected with the body of the cabinet to open and close the high pressure chamber. Therefore, the high-pressure chamber can be opened and closed quickly, and the starting, the stopping, the maintenance and the like of the internal elements of the high-pressure chamber are facilitated. Similarly, the second door 2 may open and close the high-pressure chamber by sliding, a combined sliding and rotating motion, or the like.

For example, the second door 2 is fixed to the cabinet by a second door lock 25, wherein the left side of the second door 2 can be rotatably connected to the left side plate 321 of the cabinet, and the right side of the second door 2 can be locked to and separated from the right side plate 322 of the cabinet by the second door lock 25.

The viewing window 23 is openable, in other words, the viewing window has an open state and a closed state.

For example, the third door lock 24 is adopted to fix the observation window 23, so that the opening and closing indication of the breaker body can be observed under normal conditions, and the third door lock 24 can be opened under emergency conditions such as faults and the like, so that the emergency opening operation is performed on the first breaker 4 body, and the safety operation reliability of the cabinet body 32 is improved. In some embodiments, third door lock 24 is a line lock, so that opening and closing are convenient and quick in emergency situations; in other embodiments, other types of locks may be used for third door lock 24.

Optionally, a partition 13 is provided in the cabinet, and the inner space of the cabinet is partitioned by the partition.

Referring to fig. 1 to 5, in some embodiments, the cabinet may include a left side plate 321, a right side plate 322, a top plate 323, and a bottom plate 324, the partition 13 extends in the left-right direction and is connected between the left side plate 321 and the right side plate 322, and the relay instrument room is formed between the front portion of the top plate 323 and the partition 13. Can be with baffle 13 stably install with the cabinet internal, improved baffle 13's stability and security, in addition, the relay instrument room forms in the inboard of roof 323, simplified the cabinet body 32 structure, in addition, the relay instrument room forms with the upper portion of the cabinet body, can conveniently look over and overhaul the component, the display information etc. of relay instrument room department, further make maintenance and assembly process simplify.

Optionally, the inside space of the cabinet body is divided into the relay instrument room and the high-pressure room by the partition 13, and an independent relay instrument room is not required to be additionally arranged, so that the cabinet body 32 is easy to integrally form, and the high-pressure and low-pressure distribution is reasonable.

Further, referring to fig. 1 and 3, the partition 13 includes a vertical limb 131 extending in an up-down direction and a horizontal limb 132 extending in a front-rear direction, an upper end of the vertical limb 131 is adjacent to or connected to the top plate 323, a rear end of the horizontal limb 132 is adjacent to or connected to a lower end of the vertical limb 131, and the horizontal limb 132 is spaced apart from the top plate 323 by a predetermined distance to form a relay meter chamber. The utility model discloses a baffle 13 sets to non-rectangular shape, but the shape of bending, the spatial layout of relay instrument room is more reasonable, for example, all sets up relay instrument room and hyperbaric chamber's opening when forward, and relay instrument room has carried out the extension at the degree of depth along the fore-and-aft direction, avoids occupying the open space of hyperbaric chamber to the convenience is maintained the interior components and parts of hyperbaric chamber.

The rear end of the horizontal limb 132 may be directly connected to the lower end of the vertical limb 131, or the rear end of the horizontal limb 132 may be connected to the lower end of the vertical limb 131 through an inclined limb 133, for example, referring to fig. 3, the inclined limb 133 extends obliquely from top to bottom and forwards, the upper end of the inclined limb 133 is connected to the lower end of the vertical limb 131, and the lower end of the inclined limb 133 is connected to the rear end of the horizontal limb 132.

Of course, the partition 13 of the present invention may also be disposed in other places, for example, the partition 13 is disposed in a U shape, and the relay instrument room is formed by the U-shaped partition 13 cooperating with the left side plate 321 or the right side plate 322. Of course, the above description is only a few specific descriptions of the present invention, and should not be construed as limiting the scope of the present invention.

Alternatively, the partition 13 may be integrally formed, for example, integrally formed by a metal plate, of course, the partition 13 may also be in a separate form, and the parts of the partition 13 may be separated from each other, or may be connected together by welding, bolting, snapping, and the like. Of course, the partition 13 may be formed integrally, which may effectively improve the structural strength of the partition 13.

Further, referring to fig. 3, a flange 134 is disposed at an edge of the partition 13, and the partition 13 may be connected to the body of the cabinet through the flange 134.

In addition, since the partition plate 13 includes the horizontal limbs 132 and the vertical limbs 131, the connection points between the partition plate 13 and the left and right side plates 321 and 322 are increased, so that the installation stability and strength of the partition plate 13 can be improved by effectively improving the connection points between the partition plate 13 and the side plates.

Referring to fig. 1, in some embodiments, the opening of the relay instrument chamber and the opening of the high-voltage chamber may be disposed on the same side of the cabinet. For example, the opening of the relay instrument room and the opening of the high-pressure chamber are both arranged on the front side of the cabinet body.

In conjunction with the foregoing embodiments, the first door 1 is disposed above the second door 2. First room door 1 and second room door 2 set up in the front side of the body of the cabinet body in unison, can make things convenient for the assembly and the maintenance of the cabinet body, moreover, in wired space, only need the front side of the cabinet body can switch first room door 1 and second room door 2 can, reduced the space of maintaining the cabinet body effectively.

In addition, for form a plurality of cavities more than three in the internal formation of cabinet 32, the utility model discloses well first room door 1 and second room door 2's the form that sets up can dwindle effectively and maintain required space to the cabinet body, and it is convenient to maintain moreover, need not open a plurality of room doors and comes to maintain the cabinet body.

Referring to fig. 1 and 5, in some embodiments of the present invention, a pressure relief plate 12 is installed at the top end of the high pressure chamber, and the pressure relief plate 12 is provided with dense micropores.

The utility model discloses in, pressure relief board 12 has been installed at the high-pressure chamber top, and it has intensive micropore to open on the pressure relief board 12, and under normal operating condition, pressure relief board 12 is used for the cabinet body 32 heat dissipation. And for relieving pressure and arcing inside the cabinet when the internal of the cabinet body 32 is faulted and arcing occurs.

Specifically, when an arc fault occurs inside the medium-voltage switchgear 100, the temperature of the arc generated by the short circuit is high, the energy is large, the arc is very light plasma, the arc moves at a high speed in the switchgear under the action of electric power and hot gas, the temperature and the pressure inside the switchgear 100 suddenly rise, and the huge pressure can rush away the pressure relief plate 12 to realize the arc relief. The pressure relief plate 12 is fixed with the top cover plate by using metal bolts and plastic bolts, and high-temperature gas generated by internal arc faults can melt the plastic bolts on one side of the pressure relief plate 12 and blow the pressure relief plate 12 open to realize arc relief.

Alternatively, referring to fig. 3, the grounding switch 7 may include a switching section and a second electrified sensor, which may be used to support the switching section.

Specifically, the grounding switch 7 mainly includes a metal body, a movable contact, a fixed contact, a second electrified sensor, a transmission mechanism, an operating rod, and the like. One end of the second electrified sensor is connected to the metal body, and the other end of the second electrified sensor is connected to the static contact. During normal operation, the operating lever is rotated by the operating handle, the rotation of the operating lever drives the transmission mechanism, the transmission mechanism transmits force to the moving contact, the moving contact rotates by 90 degrees and is in contact with the static contact, and primary main circuit grounding is achieved.

In some embodiments, the height dimension of the cabinet 32 in the up-down direction is 1500mm, and the depth dimension of the cabinet 32 in the front-back direction is 1300 mm. The utility model discloses a locate the internal portion of cabinet with baffle 13 and cut apart out high-low pressure room, the size of the cabinet body 32 that reduces.

The utility model discloses can be applicable to 10kV medium voltage switchgear 100, adopt and cover the aluminium zinc steel sheet and form through multiple bending and riveting to adopt a baffle 13 to divide into two compartment structures of relay instrument room (low-pressure chamber) and hyperbaric chamber with cabinet body 32 structure. The door structure of the cabinet body 32 adopts an upper door and a lower door (namely a first door 1 and a second door 2), the left side of the door is connected with the frame of the left side board 321 by a hinge, the right side of the door is fixed by a screw lock, and the first door 1 integrates the microcomputer comprehensive protection device 15, the electrified display device, the multifunctional meter 16, the condensation controller 19, the change-over switch 26, the indicator light 20, the switching press plate 22, the main wiring schematic diagram 18 and the like on the door panel.

As shown in fig. 1, the technical scheme adopts a design scheme that the volume is smaller and more compact, and internal components are more simplified and intelligent. The scheme has the advantages that the utilization function is unchanged, the structure is simplified, the electric elements are reasonably and compactly arranged, the height and the depth of the conventional middle-set handcart type circuit breaker switch cabinet 100 are effectively reduced, and the compact 10kV medium-voltage switch cabinet 100 is designed.

According to the functional characteristics of the 10kV medium-voltage switch cabinet 100 of the rail transit power supply system scheme, the main body of the switch cabinet 100 is composed of a vacuum circuit breaker, a current transformer 9, a grounding switch 7 and a copper bar, a microcomputer comprehensive protection device 15 is arranged to realize monitoring and protection, and corresponding electrical interlocking and mechanical interlocking are arranged to meet the functional requirement of five prevention. Under the precondition of completely meeting the requirements of complete function, safety and reliability, the reasonable layout realizes the maximization of space utilization in the cabinet, the height of the cabinet body 32 is reduced to 1500mm (for example, in the range of 1000 mm to 2000 mm), the depth of the cabinet is reduced to 1300mm (for example, in the range of 1000 mm to 1500 mm), and the working conditions of height limitation, compact planar layout and the like can be adapted.

The arrangement redundancy in the middle-mounted handcart type circuit breaker switch cabinet 100 widely used in the related art is large, the structure is not compact enough, redundant space cannot be effectively utilized, the height of the cabinet body 32 is 2200-2400mm generally, and the depth of the cabinet is 1600-2000 mm generally. The utility model discloses the scheme combines the functional requirement, and the maximize utilizes the space, carries out reasonable compact arranging with layout in the cabinet, makes the cabinet body 32 highly reduce to 1500mm, and the cabinet reduces to 1300mm deeply.

Additionally, the utility model discloses a two electrified sensors (be first electrified sensor 29 and the electrified sensor of second), but monitoring bus and the electrified condition of feeder, electrified display 17 can select for use in a flexible way with the electric shutting scheme of 2 electromagnetic locks on second room door simultaneously.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (15)

1. A switch cabinet is characterized by comprising a cabinet body, wherein a relay instrument chamber and a high-pressure chamber are arranged in the cabinet body, a first circuit breaker, a current transformer and a grounding switch are arranged in the high-pressure chamber, a wire outlet end of the first circuit breaker is connected with a wire inlet end of the current transformer, a wire outlet end of the current transformer is connected with the grounding switch,

first circuit breaker is located an tip along first direction in the high-voltage chamber, earthing switch locates follow in the high-voltage chamber the middle part of first direction, current transformer locates another tip along first direction in the high-voltage chamber, direction about the first direction perpendicular to.

2. The switchgear cabinet according to claim 1, characterized in that the cabinet body comprises: the first door is used for opening and closing the relay instrument chamber, and a plurality of first electric elements are integrated on the first door.

3. The switchgear cabinet according to claim 2, wherein a second electrical component is disposed in the relay instrument chamber; the first electrical element is electrically connected with the second electrical element.

4. The switchgear cabinet as claimed in claim 3, wherein a detachable grid plate is fixed in the relay instrument chamber, and the grid plate is used for fixedly mounting the second electrical component in the relay instrument chamber.

5. The switchgear cabinet according to claim 3, wherein the first electrical component comprises at least one of a microcomputer integrated protection device, a live display device, a multifunctional box, a transfer switch, an indicator light, and a switching press plate,

the second electrical component includes at least one of a second circuit breaker, a terminal block, and a lighting lamp.

6. The switchgear cabinet according to claim 1, wherein a wall bushing is disposed on a sidewall of the high voltage chamber, an upper branch busbar of the first circuit breaker is connected to a main busbar passing through the wall bushing, a first strip sensor is disposed in the high voltage chamber, the first strip sensor is connected to the main busbar, and the first strip sensor supports the main busbar.

7. The switchgear cabinet according to claim 6, wherein the inner space of the cabinet body is divided into the relay instrument chamber and the high pressure chamber by a partition plate, and the first belt sensor is mounted on the partition plate.

8. The switchgear cabinet as claimed in claim 1, further comprising a condensation controller, wherein a heater is installed in the high pressure chamber, and the condensation controller controls the heater through signal transmission.

9. The switchgear as claimed in claim 1, wherein the cabinet further comprises:

the second door is used for opening and closing the high-pressure chamber, and an observation window is arranged on the second door.

10. The switchgear cabinet according to claim 9, wherein the said observation window has an open state and a closed state.

11. The switchgear of claim 1, wherein the inner space of the cabinet is partitioned by a partition extending in a left-right direction and connected between the left and right side plates of the cabinet, and the relay instrument room is formed between the front top plate of the cabinet and the partition.

12. The switchgear as claimed in claim 11, wherein the partition comprises a vertical limb extending in an up-down direction and a horizontal limb extending in a front-back direction, an upper end of the vertical limb is adjacent to or connected to the top plate, a rear end of the horizontal limb is adjacent to or connected to a lower end of the vertical limb, and the horizontal limb and the top plate are spaced apart by a predetermined distance to form the relay meter chamber.

13. The switch cabinet according to claim 1, wherein the opening of the relay instrument room and the opening of the high pressure chamber are both disposed at a front side of the cabinet body, and the opening of the relay instrument room is higher than the opening of the high pressure chamber.

14. Switchgear cabinet according to claim 1, characterized in that the first circuit breaker is arranged in front of the high-pressure chamber, the current transformer is arranged in the middle of the high-pressure chamber, the current transformer is arranged in the rear of the high-pressure chamber.

15. The switch cabinet according to claim 1, wherein a pressure relief plate is installed on the top end of the high pressure chamber, and the pressure relief plate is provided with dense micro-holes.