CN216959090U - Draw-out type switchgear - Google Patents

Abstract

The present application relates to a draw-out switchgear. According to the draw-out switch equipment, the disconnecting switch and the circuit breaker are fixedly connected to the bracket, the bracket is movably arranged in the switch cabinet body, and the lower wire outlet seat of the solid-sealed polar pole of the circuit breaker is connected with the bus copper bar in a detachable connection mode; when the circuit breaker is overhauled, only the lower wire outlet seat of the solid-sealed polar pole and the connecting part between the bus copper bars are required to be detached, and then the movable tray is taken out. The disassembly mode of the circuit breaker in the draw-out switchgear is simple, and the disassembly efficiency of the circuit breaker is improved.

Description

Draw-out type switchgear

Technical Field

The application relates to the technical field of high-voltage equipment, in particular to a draw-out type switch device.

Background

In current combination formula switchgear, the circuit breaker all is fixed mounting in corresponding cabinet body, when the circuit breaker breaks down to overhaul or change, need demolish the circuit breaker earlier. Because in present combination formula switchgear, the circuit breaker all is fixed mounting in corresponding cabinet body, when dismantling the circuit breaker, need to dismantle other parts, for example isolator switch part together, waste time and energy.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a draw-out switchgear to improve the above-mentioned circuit breaker and demolish complicacy, technical problem that wastes time and energy.

In order to achieve the above purpose, the present application provides the following technical solutions:

in a first aspect, an embodiment of the present application provides a draw-out switchgear, including:

the switch cabinet comprises a switch cabinet body, an isolating switch knife switch, a circuit breaker and a bus copper bar;

the switch cabinet body comprises a bracket, and the bracket is movably arranged in the switch cabinet body to isolate a bus chamber and a breaker chamber; wherein the bus bar chamber is arranged above the breaker chamber;

the disconnecting switch is arranged in the bus chamber;

the circuit breaker is arranged in the circuit breaker chamber;

the circuit breaker comprises an embedded pole, and a lower wire outlet seat of the embedded pole is fixedly connected with the bus copper bar in a detachable connection mode;

the disconnecting switch and the circuit breaker are respectively and fixedly connected with the bracket.

In the above scheme, the draw-out switchgear is characterized in that the disconnecting switch and the circuit breaker are fixedly connected on the bracket, the bracket is movably arranged in the switchgear body, and the lower outlet seat of the embedded pole of the circuit breaker is connected with the bus copper bar in a detachable connection mode; when the circuit breaker is overhauled, only the lower wire outlet seat of the solid-sealed polar pole and the connecting part between the bus copper bars are required to be detached, and then the movable tray is taken out. The disassembly mode of the circuit breaker in the drawout switchgear is simple, the disassembly efficiency of the circuit breaker is improved, frequent disassembly of other parts of the switch cabinet is avoided when the circuit breaker is overhauled, and the service life of the switch cabinet can be prolonged. In addition, this pull-out switchgear can dismantle the connection between lower outlet seat and the generating line copper bar through solid utmost point post that seals, has avoided when being connected with the generating line copper bar through the plum blossom contact, and the contact surface is unstable, takes place the problem of spring easily.

Optionally, an insulating partition plate is arranged between the disconnecting switch and the circuit breaker; the bracket is provided with a through hole in the vertical direction, and the through hole is used for embedding the insulating partition plate into the through hole.

In the above scheme, the isolation switch and the circuit breaker are effectively divided by the insulation partition plate through embedding the insulation partition plate into the through hole which is formed in the bracket in the vertical direction.

Optionally, positioning blocks are respectively arranged at two ends of one surface of the bracket, which is in contact with the rear wall of the switch cabinet body; a positioning groove is formed in the corresponding position of the switch cabinet body; the positioning groove is used for matching with the positioning block to realize positioning of the bracket when the bracket is installed.

In the above scheme, the positioning blocks are arranged at two ends of one surface of the bracket, which is in contact with the rear wall of the switch cabinet body, and the positioning grooves are arranged at corresponding positions on the inner side of the rear wall of the switch cabinet body. When the circuit breaker is overhauled, the bracket needs to be installed back again, and when the bracket is installed, the bracket can be quickly positioned through the positioning block and the positioning groove.

Optionally, the disconnecting switch includes a disconnecting switch main shaft and three groups of disconnecting switch components; the circuit breaker comprises three groups of solid-sealed polar columns; and the three groups of isolating switch assemblies are respectively fixed on the isolating switch main shaft.

In the above scheme, through with three groups the isolator subassembly is fixed respectively on the isolator main shaft, realizes three isolator subassemblies action when realizing three groups through the isolator main shaft, realizes the integrative operation effect of three-phase, has guaranteed the synchronism of three groups of isolator subassemblies action.

Optionally, each of the isolating switch assemblies includes: the insulating seat, the static contact and the disconnecting link; one end of the insulating seat is fixed on the bracket; the static contact is fixed at the other end of the insulating seat; the first end of the disconnecting link is fixed on the isolating switch main shaft, and the second end of the disconnecting link rotates along with the rotation of the isolating switch main shaft; and the upper wire outlet seat of each solid-sealed polar pole is connected with the first end of the disconnecting link of the corresponding isolating switch assembly.

In the scheme, the first end of the disconnecting link is fixed on the isolating switch main shaft, and the second end of the disconnecting link rotates along with the rotation of the isolating switch main shaft, so that the station of the disconnecting link can be changed by rotating the isolating switch main shaft, and further the function switching among switching-on, isolating and grounding is realized.

Optionally, the second end of the disconnecting link comprises two plate-shaped cutting heads which are parallel to each other, and the two plate-shaped cutting heads form a cutter groove; the knife groove is used for embedding the fixed contact when the second end rotates to the fixed contact position.

Optionally, grooves are formed in the inner walls of the two sides of the switch cabinet body; the bracket is movably arranged in the switch cabinet body through the groove.

In the scheme, the grooves are formed in the inner walls of the two sides of the switch cabinet body, and the bracket is movably arranged in the switch cabinet body through the grooves, so that the disassembly mode of the circuit breaker in the drawout switch device is simpler, the disassembly steps are smoother, and the disassembly efficiency of the circuit breaker is further improved.

Optionally, two sides of the bracket are respectively and fixedly connected with a plurality of rollers; the rollers on the two sides of the bracket slide along the grooves on the inner walls on the two sides of the switch cabinet body.

In the scheme, the plurality of rollers are fixed on the two sides of the bracket, the bracket is drawn out and inserted through the rollers, and the operation complexity in the disassembly process of the circuit breaker is reduced.

Optionally, the switch cabinet body further has a mechanism chamber, and an isolating switch operating mechanism and a circuit breaker operating mechanism are arranged in the mechanism chamber; the disconnecting switch operating mechanism is used for controlling the disconnecting switch or the closing switch of the disconnecting switch knife switch, and the circuit breaker operating mechanism is used for controlling the disconnecting switch or the closing switch of the circuit breaker; one end of the isolating switch main shaft is fixed on the bracket through a shaft seat, and the other end of the isolating switch main shaft penetrates through the mechanism chamber.

Optionally, the switch cabinet body further has a cable chamber located below the mechanism chamber, and a current transformer, a grounding switch and a grounding switch operating mechanism are arranged in the cable chamber; the current transformer and the grounding switch operating mechanism are respectively electrically connected with the grounding switch.

In the scheme, the current transformer can be used for detecting electric leakage, and when the circuit leaks electricity, the power supply of the switch cabinet can be cut off so as to ensure personal safety; the high current can be converted into the low current which can be received by the secondary element, so that the purpose of protecting or monitoring the mounted load and/or the line is realized.

The switch cabinet body is also provided with an instrument room positioned above the mechanism room; and a secondary element is arranged in the instrument room.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic front structural view of a draw-out switchgear according to an embodiment of the present disclosure;

fig. 2 is a schematic side view of a withdrawable switchgear according to an embodiment of the present application;

fig. 3 is a schematic front structural view of another drawout switchgear provided in an embodiment of the present application.

Reference numerals:

1-a switch cabinet body, 2-an isolation switch knife switch, 3-a circuit breaker and 4-a bus copper bar;

11-bracket, 12-bus chamber, 13-breaker chamber, 14-mechanism chamber, 15-cable chamber, 16-instrument chamber;

21-an isolating switch main shaft, 22-an isolating switch component and 31-a solid-sealed pole;

111-positioning block, 112-groove, 113-roller;

221-an insulating seat, 222-a fixed contact, 223-a disconnecting link and 311-a lower wire outlet seat;

2231-second end of the knife switch.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The terms "first," "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily being construed as indicating or implying any actual such relationship or order between such entities or actions.

To the shortcoming that exists among the prior art, this application embodiment provides a pull-out switchgear for reduce the maintenance complexity of circuit breaker in the cubical switchboard. Referring to fig. 1, fig. 1 is a schematic structural diagram of a withdrawable switchgear according to an embodiment of the present application, where the withdrawable switchgear includes:

the switch cabinet comprises a switch cabinet body 1, an isolating switch knife switch 2, a circuit breaker 3 and a bus copper bar 4;

the switch cabinet body comprises a bracket 11, and the bracket 11 is movably arranged in the switch cabinet body 1 to isolate a bus chamber 12 and a breaker chamber 13; the bus chamber 12 is arranged above the breaker chamber 13;

the disconnecting switch 2 is arranged in the bus chamber 12;

the breaker 3 is installed in the breaker chamber 13;

the circuit breaker 3 comprises an embedded pole 31, and a lower wire outlet seat 311 of the embedded pole 31 is fixedly connected with the bus copper bar 4 in a detachable connection mode;

the disconnecting switch knife switch 2 and the breaker 3 are respectively and fixedly connected with the bracket 11.

The switch cabinet body 1 can be made of high-strength aluminum-zinc plated steel plates through processing, bending and splicing by rivet nuts and bolts. The disconnecting switch knife switch 2 is a switching device mainly used for isolating a power supply, switching operation and connecting and disconnecting a small current circuit. The breaker 3 is a vacuum breaker and comprises a solid-sealed pole 31; the embedded pole 31 is a pole formed by simultaneously embedding a vacuum interrupter and conductive parts related to a circuit breaker into a solid insulating material such as epoxy resin which is easily cured, so that the pole of the circuit breaker 3 becomes an integral part. The solid-sealed polar pole 31 adopts a modular design, is simple in structure, few in detachable parts, high in reliability and higher in insulating strength compared with air insulation, and the solid-sealed polar pole 31 is high in insulating strength. In addition, because the volume of the solid-sealed pole 31 is smaller, the volume of the circuit breaker 3 can be smaller, and the miniaturization of the switch cabinet is facilitated. The bus copper bar 4 refers to a connecting copper bar of a main switch and switches in each shunt circuit in the draw-out switchgear in the power supply system, and the surface of the bus copper bar is subjected to insulation treatment and mainly used as a lead. The detachable connection can be realized by a threaded connection.

The lower wire outlet seat of the solid-sealed polar pole 31 is fixedly connected with the bus copper bar 4 in a detachable connection mode, when the circuit breaker 3 is overhauled, the connection between the lower wire outlet seat of the solid-sealed polar pole 31 and the bus copper bar 4 can be disassembled, and then the bracket 11 is drawn out, so that the purpose of taking out the circuit breaker 3 can be achieved; when installing the circuit breaker 3 again, only need insert the switch cabinet body 1 with bracket 11 in, will seal the lower wire seat and the generating line copper bar 4 of utmost point post 31 again and reconnect through the detachable mode, can realize installing the purpose in the switch cabinet body 1 with circuit breaker 3 again.

As can be seen from the above, according to the drawout switchgear provided in the embodiment of the present application, the disconnecting switch and the circuit breaker are fixedly connected to the bracket, and the bracket is movably disposed in the switchgear body, and the lower wire outlet seat of the embedded pole of the circuit breaker is connected to the bus copper bar in a detachable connection manner; when the circuit breaker is overhauled, only the lower wire outlet seat of the solid-sealed polar pole and the connecting part between the bus copper bars are required to be detached, and then the movable tray is taken out. The disassembly mode of the circuit breaker in the drawout switchgear is simple, the disassembly efficiency of the circuit breaker is improved, frequent disassembly of other parts of the switch cabinet is avoided when the circuit breaker is overhauled, and the service life of the switch cabinet can be prolonged. In addition, this pull-out switchgear can dismantle the connection between lower outlet seat and the generating line copper bar through solid utmost point post that seals, has avoided when being connected with the generating line copper bar through the plum blossom contact, and the contact surface is unstable, takes place the problem of spring easily.

Referring to fig. 2, fig. 3, fig. 2 is a schematic structural diagram of a second drawout switchgear provided in an embodiment of the present application, and fig. 3 is a schematic structural diagram of a third drawout switchgear provided in an embodiment of the present application.

In some alternative embodiments, an insulating barrier is provided between the disconnector switch 2 and the circuit breaker 3; the bracket 11 is provided with a through hole in the vertical direction, and the through hole is used for embedding the insulating partition plate therein.

Wherein, through set up the through-hole of direction from top to bottom on bracket 11 to imbed in this through-hole with insulating barrier, can realize effectively cutting apart between isolator switch 2 and circuit breaker 3 through insulating barrier.

In some optional embodiments, the two ends of the surface of the bracket 11 contacting the rear wall of the switch cabinet body 1 are respectively provided with a positioning block 111; a positioning groove is arranged at the corresponding position of the switch cabinet body 1; the positioning groove is used for positioning the bracket 11 by matching with the positioning block 111 when the bracket 111 is installed.

The positioning block 111 may be a cylinder or a circular truncated cone, and the positioning block 111 may also be implemented by a combination of the cylinder and the circular truncated cone, which is not specifically limited in this application. The positioning blocks 111 are arranged at two ends of one surface of the bracket 11, which is contacted with the rear wall of the switch cabinet body 1, and the positioning grooves are arranged at corresponding positions on the inner side of the rear wall of the switch cabinet body 1. The bracket 11 needs to be installed again after the breaker 3 is overhauled, and when the bracket 11 is installed, the bracket 11 can be quickly positioned through the positioning block 111 and the positioning groove.

In some alternative embodiments, the disconnector switch 2 comprises a disconnector main shaft 21 and three sets of disconnector components 22; the breaker 3 comprises three groups of embedded poles 31; the three sets of isolating switch assemblies 22 are respectively fixed on the isolating switch main shaft 21.

Wherein, through fixing three isolator subassemblies 22 respectively on isolator main shaft 21, realize three isolator subassemblies 22's simultaneous action through isolator main shaft 21, realize the integrative operation effect of three-phase, guaranteed the synchronism of three isolator subassemblies 22 actions. The disconnecting switch 2 has the functions of switching on, isolating and grounding, and the three functions are switched by rotating the disconnecting switch main shaft 21; when the disconnecting switch knife switch 2 and the main bus are in a switch-on position, the circuit breaker 3 can be switched on, and after the circuit breaker is switched off, the disconnecting switch can be switched off; specifically, when a feeder cable is subjected to incoming line maintenance, the isolating switch main shaft 21 needs to be rotated to rotate the isolating switch knife switch 2 to an isolating position, the isolating switch knife switch 2 is further rotated to a grounding position, and then the circuit breaker 3 is switched on to realize effective grounding of the feeder cable; when the power transmission operation is executed, the disconnecting switch 2 is firstly rotated to the switching-on position from the disconnecting position, and then the switching-on operation is carried out on the circuit breaker 3.

In some alternative embodiments, each isolation switch assembly 22 includes: the insulating base 221, the fixed contact 222 and the knife switch 223; one end of the insulating base 221 is fixed on the bracket 11; the fixed contact 222 is fixed at the other end of the insulating base 221; the first end of the knife switch 223 is fixed on the main shaft 21 of the isolating switch, and the second end 2231 of the knife switch rotates along with the rotation of the main shaft 21 of the isolating switch; the upper outlet of each sealed pole 31 is connected to the first end of the knife switch 223 of the corresponding isolating switch assembly.

The insulating base 221 may be an arc-shaped insulating base. By fixing the first end of the disconnecting link 223 on the main isolating switch shaft 21 and rotating the second end 2231 of the disconnecting link along with the rotation of the main isolating switch shaft 21, the station of the disconnecting link 223 can be changed by rotating the main isolating switch shaft 21, and further, the switching of functions among switching-on, isolating and grounding can be realized.

In some alternative embodiments, the second end of the knife gate 223 comprises two plate-like tips parallel to each other, both of which form a knife slot; the knife slot is used for embedding the fixed contact 222 therein when the second end is rotated to the position of the fixed contact 222.

In some optional embodiments, grooves 112 are arranged on the inner walls of the two sides of the switch cabinet body 1; the bracket 11 is movably arranged in the switch cabinet body 1 through the groove 112.

The groove 112 may be fixedly connected to the surfaces of the inner walls of the two sides of the switch cabinet body 1, and the groove 112 may be a linear groove with a U-shaped cross section.

In some alternative embodiments, a plurality of rollers 113 are fixedly connected to both sides of the bracket 11; the rollers 113 on both sides of the bracket 11 slide along the grooves 112 on the inner walls on both sides of the switch cabinet body 1.

Wherein the rollers 113 are symmetrically disposed on two sides of the bracket 11, for example, one side of the bracket 11

The bottom surface of the groove 112 can be used for bearing the roller 113, and the position and the sliding direction of the roller 113 are limited by the groove 112.

In some optional embodiments, the switch cabinet body 1 further has a mechanism chamber 14, and the isolating switch operating mechanism and the circuit breaker operating mechanism are arranged in the mechanism chamber 14; the disconnecting switch operating mechanism is used for controlling the disconnecting switch or the closing switch of the disconnecting switch knife switch 2, and the circuit breaker operating mechanism is used for controlling the disconnecting switch or the closing switch of the circuit breaker 3; one end of the main shaft 21 of the isolating switch is fixed on the bracket 11 through the shaft seat 211, and the other end of the main shaft 21 of the isolating switch penetrates through the mechanism chamber 14.

The isolating switch operating mechanism or the control machine operating mechanism can be a manual operating mechanism or an electric operating mechanism. The disconnecting switch operating mechanism realizes the switching-on or switching-off of the disconnecting switch according to the switching-on or switching-off signal of the disconnecting switch; the circuit breaker operating mechanism realizes the opening or closing of the circuit breaker according to the opening or closing signal of the circuit breaker.

In some optional embodiments, the switch cabinet body 1 further has a cable chamber 15 located below the mechanism chamber 14, and a current transformer, an earthing switch and an earthing switch operating mechanism are arranged in the cable chamber 15; the current transformer and the grounding switch operating mechanism are respectively electrically connected with the grounding switch.

The current transformer can induce small current from the large current cable according to a certain proportion for instrument measurement and relay protection. The single current transformer can get electricity from a single line and can be used for expanding the range of the single-phase electric meter, measuring the current of the single-phase line, measuring the current of the three-phase balanced line and the like; the two ammeters are respectively connected with the two buses and can measure three-phase currents in a single-phase balanced line or a three-phase unbalanced line; three current transformers may be used to extend the range of the relay, etc.

The switch cabinet body 1 is also provided with an instrument room 16 positioned above the mechanism room 14; a secondary component is provided in the instrument room 16.

The secondary element device comprises a relay protection element, a measuring instrument, a charged monitoring indicator and the like. The relay protection element comprises a measuring relay, and can also be an auxiliary relay such as a time relay, an intermediate relay, a signal relay, a logic relay and the like. In particular, the measurement relay may be used to reflect changes in the characteristic quantity of the protected element; taking a current relay in current protection as an example, the current relay operates when its characteristic current reaches an operating value. An electric relay in which the auxiliary relay operates only in accordance with whether the electric quantity is within the operating range or 0; taking a logic relay as an example, it can be used to implement a specific logic function. The measuring instruments include an ammeter, a voltmeter, a wattmeter, etc., which can be used to measure the electric quantity such as current, voltage or power in the line. The charge monitoring indicator may indicate when the device is charged.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and system may be implemented in other ways. The above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and there may be other divisions in actual implementation, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A draw out switchgear, characterized in that the switchgear comprises:

the switch cabinet comprises a switch cabinet body, an isolating switch knife switch, a circuit breaker and a bus copper bar;

the switch cabinet body comprises a bracket, and the bracket is movably arranged in the switch cabinet body to isolate a bus chamber and a breaker chamber; wherein the bus bar chamber is arranged above the breaker chamber;

the disconnecting switch is arranged in the bus chamber;

the circuit breaker is arranged in the circuit breaker chamber;

the circuit breaker comprises an embedded pole, and a lower wire outlet seat of the embedded pole is fixedly connected with the bus copper bar in a detachable connection mode;

the disconnecting switch and the circuit breaker are respectively and fixedly connected with the bracket.

2. The switchgear as claimed in claim 1, wherein an insulating barrier is provided between the disconnector disconnecting link and the circuit breaker;

the bracket is provided with a through hole in the vertical direction, and the through hole is used for embedding the insulating partition plate into the through hole.

3. The switchgear as claimed in claim 1, wherein:

positioning blocks are respectively arranged at two ends of one surface of the bracket, which is contacted with the rear wall of the switch cabinet body;

a positioning groove is formed in the corresponding position of the switch cabinet body;

the positioning groove is used for matching with the positioning block to realize positioning of the bracket when the bracket is installed.

4. The switchgear as claimed in claim 1, wherein the disconnector switch comprises a disconnector main shaft and three sets of disconnector components; the circuit breaker comprises three groups of solid-sealed polar columns;

and the three groups of isolating switch assemblies are respectively fixed on the isolating switch main shaft.

5. The switchgear device according to claim 4, wherein each said disconnector assembly comprises: the insulation seat, the static contact and the knife switch;

one end of the insulating seat is fixed on the bracket;

the static contact is fixed at the other end of the insulating seat;

the first end of the disconnecting link is fixed on the isolating switch main shaft, and the second end of the disconnecting link rotates along with the rotation of the isolating switch main shaft;

and the upper wire outlet seat of each solid-sealed polar pole is connected with the first end of the disconnecting link of the corresponding isolating switch assembly.

6. The switchgear as claimed in claim 5, wherein:

grooves are formed in the inner walls of the two sides of the switch cabinet body;

the bracket is movably arranged in the switch cabinet body through the groove.

7. The switchgear as claimed in claim 6, wherein a plurality of rollers are fixedly connected to both sides of the bracket, respectively;

the rollers on the two sides of the bracket slide along the grooves on the inner walls on the two sides of the switch cabinet body.

8. The switchgear as claimed in claim 7, wherein the switchgear cabinet body further has a mechanism chamber in which a disconnector operating mechanism and a circuit breaker operating mechanism are disposed; the disconnecting switch operating mechanism is used for controlling the disconnecting switch or the closing switch of the disconnecting switch knife switch, and the circuit breaker operating mechanism is used for controlling the disconnecting switch or the closing switch of the circuit breaker;

one end of the isolating switch main shaft is fixed on the bracket through a shaft seat, and the other end of the isolating switch main shaft penetrates through the mechanism chamber.

9. The switchgear as claimed in claim 8, wherein the switchgear cabinet body further has a cable chamber located below the mechanism chamber, the cable chamber having a current transformer, an earthing switch and an earthing switch operating mechanism disposed therein;

the current transformer and the grounding switch operating mechanism are respectively electrically connected with the grounding switch.

10. The switchgear as claimed in claim 9, characterized in that the switchgear cabinet body also has an instrument room located above the mechanism room; and a secondary element is arranged in the instrument room.

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