CN215870499U - Gas insulation switch cabinet - Google Patents

Abstract

A gas insulated switchgear comprises a bus chamber module, wherein a bus, a three-position isolating switch and a primary grounding system are assembled in the bus chamber module, the three-position isolating switch is connected between the bus and the primary grounding system, a bus grounding switch is further assembled in the bus chamber module, the bus grounding switch is connected between the bus and the primary grounding system, the bus or a line side is grounded through the primary grounding system by respectively operating the bus grounding switch or the three-position isolating switch, and an interlocking function is realized between the bus grounding switch and the three-position isolating switch. According to the gas insulation switch cabinet, the bus grounding switch is additionally arranged in the bus chamber module, so that a bus is directly grounded through the bus grounding switch and the primary grounding system, the dual protection functions of line side grounding and bus side grounding are realized, and the problem of potential safety hazard during field maintenance is solved.

Description

Gas insulation switch cabinet

Technical Field

The utility model relates to the technical field of switchgear, in particular to a gas insulation switch cabinet.

Background

The conventional gas insulation cabinet is provided with a line side three-position isolating switch, the line side three-position isolating switch is used for realizing a line side grounding switch, a special grounding switch is not arranged on a bus side, when a bus needs to be grounded and overhauled, the bus can only be grounded through a grounding switch arranged on the upper stage (such as the outgoing line side of a high-voltage transformer) of a system or a three-position isolating switch and a breaker secondary closing on a sectional connection cabinet arranged on the system, the sectional bus is grounded by utilizing the realization mode that the sectional connection cabinet is used for grounding the sectional bus, the bus is grounded through a breaker, then all three-position isolating switches on the bus are switched off, then the three-position isolating switch is grounded, and finally the breaker is closed, and the bus is in a grounding state, so that the grounding program of the bus or the sectional bus depends on the system configuration, for example, the system is not provided with an upper stage/upper stage unconfigured grounding switch or the sectional connection cabinet is not arranged in the switch cabinet system, direct grounding of the bus cannot be realized, great potential safety hazards are brought to field maintenance, and the current operation and safety regulations are not met.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a gas insulated switchgear which can realize the side grounding of a bus and has high reliability.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a gas insulated switchgear comprises a bus chamber module, wherein a bus, a three-position isolating switch and a primary grounding system are assembled in the bus chamber module, the three-position isolating switch is connected between the bus and the primary grounding system, a bus grounding switch is further assembled in the bus chamber module, the bus grounding switch is connected between the bus and the primary grounding system, the bus or a line side is grounded through the primary grounding system by respectively operating the bus grounding switch or the three-position isolating switch, and an interlocking function is realized between the bus grounding switch and the three-position isolating switch.

Preferably, an electrical interlock is provided between the bus grounding switch and the bus, and when the bus is electrified, the electrical interlock prevents manual operation of the bus grounding switch to close and ground.

Preferably, an electrical interlock is arranged between the bus grounding switch and the three-position isolating switch.

Preferably, a mechanical interlock is provided between the busbar earthing switch and the three-position disconnecting switch, and the mechanical interlock prevents the three-position disconnecting switch and the busbar earthing switch from being manually operated at the same time.

Preferably, the mechanical interlock comprises a brake cable, two ends of the brake cable are respectively connected with the bus grounding switch and the three-position isolating switch, and the three-position isolating switch and the bus grounding switch are controlled by the stroke of the brake cable to be incapable of being operated simultaneously.

Preferably, the bus grounding switch and the three-position isolating switch are respectively arranged on two sides of the bus chamber module in the horizontal direction.

Preferably, the bus grounding switch comprises a first operating mechanism, a first transmission system and a bus grounding system, the first operating mechanism is in linkage connection with the first transmission system, and the first operating mechanism is manually operated to enable the first transmission system to drive the bus grounding system to act so as to realize the opening and closing action of the bus grounding switch.

Preferably, the first transmission system comprises a first transmission sealing device, a connecting rod, a connecting lever, a linkage shaft and a grounding flexible connection, the linkage shaft is assembled in the bus chamber module by the first transmission sealing device, one end of the connecting rod is connected with the first operating mechanism, the other end of the connecting rod is in linkage connection with the linkage shaft through the connecting lever, at least one connecting plate used for driving the bus grounding system to act is sleeved on the linkage shaft, and the linkage shaft is electrically connected with the primary grounding system by the grounding flexible connection.

Preferably, the bus grounding system comprises a bus grounding contact seat and a bus grounding contact piece, the bus grounding contact seat is connected with the bus, and the bus grounding contact piece is assembled on a linkage shaft of the first transmission system and is matched with the bus grounding contact seat through swinging under the action of the first transmission system.

Preferably, the grounding contact piece comprises at least one pair of L-shaped copper bars, one ends of the L-shaped copper bars arranged in pairs are connected with the linkage shaft, and the other ends of the L-shaped copper bars are used for being matched with the bus grounding contact seat.

Preferably, the three-station isolating switch comprises a second operating mechanism, a three-station mechanism, a second transmission system, a switch-on contact seat, an isolating contact piece and a grounding contact seat, the second operating mechanism, the second transmission system and the three-station mechanism are sequentially linked and connected, the switch-on contact seat is connected with a bus, the grounding contact seat is connected with a primary grounding system, and the isolating contact piece and the three-station mechanism form a connecting rod structure and are respectively matched with the switch-on contact seat and the grounding contact seat under the driving of the second transmission system.

Preferably, the primary grounding system comprises a primary grounding copper bar and a grounding terminal, and the bus grounding switch and the three-station isolating switch are respectively connected with the grounding terminal through the primary grounding copper bar.

According to the gas insulated switchgear, the bus grounding switch is additionally arranged in the bus chamber module, so that a bus is directly grounded through the bus grounding switch and the primary grounding system, the dual protection functions of line side grounding and bus side grounding are realized, in addition, the interlocking function is arranged between the bus grounding switch and the three-station isolating switch, the problem of potential safety hazards during field maintenance is solved, and meanwhile, the bus grounding switch is prevented from being operated by mistake.

In addition, the interlocking function between the bus grounding switch and the three-position isolating switch comprises electrical interlocking and mechanical interlocking, so that the bus grounding switch and the three-position isolating switch cannot be simultaneously and manually operated, and the bus grounding switch is prevented from being operated by mistake.

An electrical interlock is provided between the bus bar grounding switch and the bus bar, and the bus bar grounding switch is prevented from being erroneously operated when the bus bar is electrified.

Drawings

Fig. 1 is a schematic structural diagram of a gas insulated switchgear of the present invention;

fig. 2 is a schematic diagram of a gas insulated switchgear of the present invention;

fig. 3 is a schematic diagram of a gas insulated switchgear of the present invention (bus side grounded);

fig. 4 is a schematic diagram of a gas insulated switchgear of the present invention (line side grounded);

FIG. 5 is a schematic structural diagram of a bus grounding switch in a gas insulated switchgear according to the present invention;

FIG. 6 is a front view of FIG. 5;

fig. 7 is a schematic structural diagram of a bus grounding switch in a gas insulated switchgear of the present invention (without a grounding contact);

FIG. 8 is a schematic structural diagram of a bus grounding switch in a gas insulated switchgear according to the present invention when the bus grounding switch is opened;

fig. 9 is a schematic structural diagram of a bus grounding switch in a gas insulated switchgear according to the present invention when switching on;

FIG. 10 is a schematic structural diagram of a three-position isolating switch in a gas insulated switchgear of the present invention;

FIG. 11 is a schematic diagram (brake cable) of the mechanical interlock between the bus grounding switch and the three-position disconnecting switch in the gas insulated switchgear of the present invention;

FIG. 12 is a schematic illustration of the connection of the brake cable of FIG. 11;

FIG. 13 is an electrical interlock schematic of a bus grounding switch in a gas insulated switchgear of the present invention;

FIG. 14 is an electrical interlocking schematic diagram of a bus grounding switch and a three-position isolating switch in the gas insulated switchgear of the present invention;

FIG. 15 is a partial schematic connection diagram of FIG. 14 (single segment system);

fig. 16 is a partial schematic connection diagram of fig. 14 (two-segment system).

Detailed Description

The following further describes a specific embodiment of a gas insulated switchgear according to the present invention, with reference to the examples shown in fig. 1 to 16. A gas-insulated switchgear of the present invention is not limited to the description of the following embodiments.

A gas insulated switchgear includes a bus chamber module 1, a bus 2, a three-position isolating switch 3 and a primary grounding system 5 are assembled in the bus chamber module 1, the three-position isolating switch 3 is connected between the bus 2 and the primary grounding system 5, a bus grounding switch 4 is also assembled in the bus chamber module 1, the bus grounding switch 4 is connected between the bus and the primary grounding system 5, the bus 2 or a line side is grounded through the primary grounding system 5 by operating the bus grounding switch 4 or the three-position isolating switch 3 respectively, and an interlocking function is provided between the bus grounding switch 4 and the three-position isolating switch 3.

According to the gas insulated switchgear, the bus grounding switch is additionally arranged in the bus chamber module, so that a bus is directly grounded through the bus grounding switch 4 and the primary grounding system 5, the dual protection functions of line side grounding and bus side grounding are realized, in addition, the interlocking function is arranged between the bus grounding switch 4 and the three-station isolating switch 3, the problem of potential safety hazard during field maintenance is solved, and meanwhile, the bus grounding switch 4 is prevented from being operated by mistake.

In conjunction with fig. 1-15, an embodiment of a gas insulated switchgear is provided, which includes a cabinet body, the cabinet body is divided into a bus chamber module 1, a breaker chamber module and a control chamber module, a bus 2, a three-position disconnecting switch 3 and a primary grounding system 5 are assembled in the bus chamber module 1, the three-position disconnecting switch 3 is connected between the bus 2 and the primary grounding system 5, and the three-position disconnecting switch 3 makes a line side circuit be connected or makes a line side grounded by respectively cooperating with the bus 2 or the primary grounding system 5; a bus grounding switch 4 is further arranged in the bus chamber module 1, the three-position disconnecting switch 3 and the bus grounding switch 4 are respectively arranged at two sides of the bus chamber module 1, in the embodiment, the bus 2 is arranged above the bus chamber module 1, the bus grounding switch 4 and the three-position disconnecting switch 3 are respectively arranged at the left side and the right side of the bus chamber module 1, the primary grounding system 5 is arranged below the bus chamber module 1, wherein the bus grounding switch 4 and the three-position disconnecting switch 3 share one set of the primary grounding system 5, but the bus grounding switch 4 and the three-position disconnecting switch 3 are respectively driven by respective independent operating mechanisms to be grounded, the bus grounding switch 4 is connected between the bus 2 and the primary grounding system 5, the primary grounding system 5 comprises a primary grounding copper bar 51 and a grounding terminal 52, the bus grounding switch 4 and the three-position disconnecting switch 3 are respectively connected with the grounding terminal 52 through the primary grounding copper bar 51, the bus grounding switch 4 is manually operated to realize grounding of the bus 2.

As shown in fig. 5-9, the bus grounding switch 4 includes a first operating mechanism 41, a first transmission system and a bus grounding system, the first operating mechanism 41 is linked with the first transmission system, the first operating mechanism 41 only allows manual operation, and the first transmission system drives the bus grounding system to operate to realize the opening and closing operation of the bus grounding switch 4 by inserting a handle into the first operating mechanism 41, preferably, a panel is disposed on a surface of the first operating mechanism 41, and when the bus grounding switch 4 does not need to be manually operated, the panel covers the first operating mechanism 41, and the panel is used for indicating a position of the bus grounding switch 4 and preventing misoperation.

The first transmission system comprises a first transmission sealing device 44, a connecting rod 42, a crank arm 43, a linkage shaft 45 and a grounding flexible connection 46, in this embodiment, the first operating mechanism 41 and the connecting rod 42 are located outside the bus bar room module 1, the linkage shaft 45 is assembled in the bus bar room module 1 by the first transmission sealing device 44, the linkage shaft 45 is electrically connected with the primary grounding system 5 through the grounding flexible connection 46, one end of the linkage shaft 45 is rotatably supported on the first transmission sealing device 44, at least one connecting plate 47 is arranged on the linkage shaft 45, the connecting plate 47 protrudes in the radial direction of the linkage shaft 45, in this embodiment, the bus bar grounding switch 4 corresponds to the three-phase bus bar 2, three connecting plates 47 arranged at intervals are arranged on the linkage shaft 45, and the other end of the linkage shaft 45 is connected with the primary grounding system 5 through the grounding flexible connection 46; one end of the connecting rod 42 is connected with the first operating mechanism 41, and the other end of the connecting rod is in linkage connection with the linkage shaft 45 through the connecting lever 43, so that the connecting lever 43, the connecting rod 42 and the linkage shaft 45 form a connecting rod structure; the bus grounding system comprises a bus grounding contact seat 49 and a bus grounding contact piece 48, wherein the bus grounding contact seat 49 is connected with a bus 2, the bus grounding contact piece 48 is assembled on a linkage shaft 45, the bus grounding contact piece 48 is preferred, the grounding contact piece 48 comprises at least one pair of L-shaped copper bars, one ends of the L-shaped copper bars which are arranged in pairs are connected with the linkage shaft 45, two L-shaped copper bars are preferably arranged on two sides of one linkage plate 47 in a row, a positioning guide block is arranged between the two L-shaped copper bars, the auxiliary effect of the linkage plate 47 is beneficial to enhancing the connection stability of the bus grounding contact piece 48 and the linkage shaft 45, when the linkage shaft 45 is driven to rotate, the two L-shaped copper bars swing along with the linkage shaft 45, the other end of the L-shaped copper bar is matched with the bus grounding contact seat 49, and the bus 2 grounding is realized.

In this embodiment, the grounding mode of the bus 2 is as follows: when the bus 2 is determined to be out of power, with the panel indicating ground contact 48 in the "ground off" position, and with a significant separation break between the ground contact 48 and the ground contact seat 49, the handle is inserted into the first operating mechanism 41 and rotated, counterclockwise in fig. 8, to swing the ground contact 48 toward the ground contact seat 49 until full contact is achieved, driven by the first transmission system, at which time the panel indicating ground contact 48 has reached the "ground on" position (see fig. 9).

Furthermore, an electrical interlock is arranged between the bus grounding switch 4 and the bus 2, when the bus 2 is electrified, the electrical interlock enables the bus grounding switch 4 which cannot be manually operated to be switched on and grounded, and after the bus 2 is powered off, the bus grounding switch 4 can be manually operated to be switched on and grounded.

As shown in fig. 13, the electrical interlock is a locking loop connected to the busbar grounding switch 4, the power supply of the locking loop is taken from a low-voltage chamber power busbar (weak current busbar of an independent power supply), the locking loop includes a live display DXN and a locking electromagnet XS, the live display DXN generally includes a set of normally open nodes and a set of normally closed nodes, one set of the normally open nodes is selected as the locking node according to actual needs, in this embodiment, the locking node is a normally closed node, when the busbar 2 is charged, the display lamp of the live display DXN is on, which means that the busbar 2 is charged, and the locking node of the live display DXN is off (in the figure, the locking electromagnet XS is off at positions 1 o 2 and 1 o 3), so that the locking electromagnet XS connected in series to the locking node is not powered, and the busbar grounding switch 4 cannot be manually closed and grounded; when the bus bar 2 is not charged, the display lamp of the charged display DXN is turned off, and the latching node is closed (closed at positions 1 o 2 and 1 o 3 in the figure), so that the latching electromagnet XS is powered, and the bus bar grounding switch 4 can be manually operated to close and ground.

Further, an electrical interlock is also arranged between the bus grounding switch 4 and the three-position isolating switch 3, particularly when a main incoming line cabinet and a breaking isolating cabinet exist in the system, the electrical interlock is added between the bus grounding switch 4 and the three-position isolating switch 3 of the main incoming line cabinet and the breaking isolating cabinet in the same system, at the moment, the electrical interlock is also arranged to be an interlock loop, and when the main incoming line cabinet three-position isolating switch 3 and the breaking isolating switch of the breaking isolating cabinet are in a switch-on state, the interlock loop is disconnected, so that the bus grounding switch 4 cannot be switched on; when the main incoming line cabinet three-station isolating switch 3 and the disconnecting switch of the disjunction isolating cabinet are in a switching-off state, the interlocking loop is connected, so that the bus grounding switch 4 can be switched on and grounded.

As shown in fig. 14-16, the interlocking circuit electrically interlocks the bus grounding switch 4 with the three-position disconnecting switch, and the interlocking circuit comprises a microcomputer five-prevention WFS, a remote/local switch QK, a switching-on/off switch 1KK, an intermediate relay ZJ2, a 1CLP3 pressing plate, a protection device 1n and a three-position switch controller 1XS, wherein the microcomputer five-prevention WFS is required to prevent the three-position disconnecting switch 3 from being switched on with a load, and the switching-on/off operation of the bus grounding switch 4 is controlled by the microcomputer five-prevention WFS, the remote/local switch QK and the switching-off switch 1 KK; the remote control on-off of the bus grounding switch 4 is realized through the remote/local transfer switch QK and the protection device 1n, and the three-position switch controller 1XS is used for acquiring the on-off state of the three-position isolating switch 3, the on-off state of the bus grounding switch 4 and forward and reverse rotation stop signals. When the main transformer incoming line cabinet adopts a single-section system, when the main transformer incoming line cabinet three-position switch 3 is in an isolation position, the remote/local change-over switch QK enables the bus grounding switch 4 to be switched on and grounded through the protection device 1 n; when a double-section system is adopted, when the three-position switch 3 of the main transformer incoming line cabinet and the sectional isolation cabinet are simultaneously in an isolation position, the remote/local change-over switch QK enables the bus grounding switch 4 to be switched on and grounded through the protection device 1 n. In fig. 15 and 16, the interlock circuit is designed to close when the circuit breaker is open, i.e. without load.

As shown in fig. 10, the three-position disconnecting switch 3 includes a second operating mechanism 31, a three-position mechanism, a second transmission system 32, a through contact seat 33, an isolating contact piece 34, and a ground contact seat 35, in this embodiment, the second operating mechanism 31 is located outside the bus bar chamber module 1, the second transmission system 32 is in sealed penetration connection so that the second operating mechanism 31, the second transmission system 32, and the three-position mechanism are sequentially linked, the through contact seat 33 is connected with the bus bar 2, the ground contact seat 35 is connected with the primary ground system 5, and the isolating contact piece 34 and the three-position mechanism form a link structure and are respectively in contact with the through contact seat 33 and the ground contact seat 35 under the driving of the second transmission system 32.

Further, a mechanical interlock is arranged between the bus grounding switch 4 and the three-position disconnecting switch 3, the mechanical interlock prevents the three-position disconnecting switch 3 and the bus grounding switch 4 from being simultaneously operated manually, an embodiment of the mechanical interlock is provided by combining fig. 11, the mechanical interlock comprises a brake cable 6, two ends of the brake cable 6 are respectively connected with the bus grounding switch 4 and the three-position disconnecting switch 3, namely can be respectively connected with the first operating mechanism 41 and the second operating mechanism 31, or are connected with the first transmission system and the second transmission system 32, in this embodiment, two ends of the brake cable 6 are respectively connected with a main shaft crank arm in the bus grounding switch 4 and the three-position disconnecting switch 3, the brake cable 6 is driven to be stretched when the main shaft rotates, and the three-position disconnecting switch 3 and the bus grounding switch 4 can not be simultaneously operated under the stroke control of the brake cable 6, namely, when three-position isolator 3 of manual operation, along with the handle rotation of three-position isolator 3 of operation, the brake cable 6 of connection in three-position isolator 3 one end is tightened up by the winding, because the stroke of brake cable 6 is fixed, make and be connected one end with generating line earthing switch 4 and be tightened up, unable manual operation generating line earthing switch 4 this moment, correspondingly, when manual operation generating line isolator 4, the brake cable 6 of connection in generating line earthing switch 4 one end is tightened up by the winding, make three-position isolator 3 can not by manual operation, mechanical interlocking's simple structure and reliable. Preferably, at least one set of sliding group 61 is arranged in the middle of the brake cable 6, and in fig. 11 and 12, a set of pulley block 61 is correspondingly arranged below the three-station isolation 3 and the bus grounding switch 4, and the pulley block 61 is in sliding fit with the brake cable 6 and can provide a guiding effect for stretching the brake cable 6.

The line side grounding process is that the breaker 7 is opened, the mechanical interlock between the bus grounding switch 4 and the three-position disconnecting switch 3 is released, an operating handle is inserted into the second operating mechanism 31, the three-position disconnecting switch 3 is switched at the positions of 'separating and clutching', 'separating and disconnecting' and 'grounding and connecting', preferably, a panel is also arranged on the second operating mechanism 31, and when the circuit is not operated, the operating handle is pulled out to cover the second operating mechanism 31.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims (12)

1. A gas-insulated switchgear, comprising a bus-bar compartment module (1), in which bus-bar compartment module (1) a bus-bar (2), a three-position disconnector (3) and a primary earthing system (5) are fitted, said three-position disconnector (3) being connected between the bus-bar (2) and the primary earthing system (5), characterized in that: the bus room module (1) is also internally provided with a bus grounding switch (4), the bus grounding switch (4) is connected between a bus and a primary grounding system (5), the bus (2) or a line side is grounded through the primary grounding system (5) by respectively operating the bus grounding switch (4) or the three-position isolating switch (3), and an interlocking function is realized between the bus grounding switch (4) and the three-position isolating switch (3).

2. A gas-insulated switchgear cabinet according to claim 1, characterized in that: an electrical interlock is arranged between the bus grounding switch (4) and the bus (2), and when the bus (2) is electrified, the electrical interlock enables the bus grounding switch (4) which cannot be manually operated to be switched on and grounded.

3. A gas-insulated switchgear cabinet according to claim 1, characterized in that: and an electrical interlock is arranged between the bus grounding switch (4) and the three-station isolating switch (3).

4. A gas-insulated switchgear cabinet according to claim 1, characterized in that: a mechanical interlock is arranged between the bus grounding switch (4) and the three-position isolating switch (3), and the three-position isolating switch (3) and the bus grounding switch (4) cannot be manually operated simultaneously due to the mechanical interlock.

5. A gas-insulated switchgear, as claimed in claim 4, characterized in that: the mechanical interlock comprises a brake cable (6), two ends of the brake cable (6) are respectively connected with the bus grounding switch (4) and the three-position isolating switch (3), and the three-position isolating switch (3) and the bus grounding switch (4) can not be operated simultaneously under the control of the stroke of the brake cable (6).

6. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the bus grounding switch (4) and the three-station isolating switch (3) are respectively arranged on two sides of the bus chamber module (1) in the horizontal direction.

7. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the bus grounding switch (4) comprises a first operating mechanism (41), a first transmission system and a bus grounding system, wherein the first operating mechanism (41) is in linkage connection with the first transmission system, and the first operating mechanism (41) is manually operated to enable the first transmission system to drive the bus grounding system to act to realize the opening and closing action of the bus grounding switch (4).

8. A gas-insulated switchgear, as claimed in claim 7, characterized in that: first transmission system includes first transmission sealing device (44), connecting rod (42), connecting lever (43), universal driving shaft (45) and ground connection flexible coupling (46), first transmission sealing device (44) assembles universal driving shaft (45) in generating line room module (1), and the one end and the operating device (41) of connecting rod (42) are connected, and the other end passes through connecting lever (43) and is connected with universal driving shaft (45) linkage, and the cover is equipped with at least one yoke plate (47) that are used for driving generating line ground system action on universal driving shaft (45), ground connection flexible coupling (46) are with universal driving shaft (45) and a ground connection system (5) electrical connection.

9. A gas-insulated switchgear, as claimed in claim 7 or 8, characterized in that: the bus grounding system comprises a bus grounding contact seat (49) and a bus grounding contact piece (48), wherein the bus grounding contact seat (49) is connected with a bus (2), and the bus grounding contact piece (48) is assembled on a linkage shaft (45) of the first transmission system and is matched with the bus grounding contact seat (49) through swinging under the action of the first transmission system.

10. A gas-insulated switchgear cabinet as claimed in claim 9, characterized in that: the grounding contact piece (48) comprises at least one pair of L-shaped copper bars, one ends of the L-shaped copper bars arranged in pairs are connected with the linkage shaft (45), and the other ends of the L-shaped copper bars are used for being matched with the bus grounding contact seat (49).

11. A gas-insulated switchgear cabinet according to claim 1, characterized in that: three station isolator (3) include second operating device (31), three station mechanisms, second drive system (32), the switch-on touches seat (33), isolation contact (34) and ground connection and touches seat (35), second operating device (31), second drive system (32) and three station mechanisms link in proper order and connect, and the switch-on touches seat (33) and is connected with generating line (2), and the ground connection touches seat (35) and is connected with one-time ground connection system (5), and isolation contact (34) and three station mechanisms form link structure and touch seat (33), ground connection respectively with the switch-on under the drive of second drive system (32) and touch seat (35) cooperation.

12. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the primary grounding system (5) comprises a primary grounding copper bar (51) and a grounding terminal (52), and the bus grounding switch (4) and the three-position isolating switch (3) are respectively connected with the grounding terminal (52) through the primary grounding copper bar (51).

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