Outdoor high-voltage vacuum switch

Abstract

The utility model discloses an outdoor high-voltage vacuum switch, which comprises a wire inlet side voltage transformer pre-embedded in a left insulator and a pluggable wire outlet side voltage transformer mounted on a right insulator, an isolating switch chamber is arranged in the right insulator, an observation window is arranged below the isolating switch chamber, and the right insulator is provided with a wire outlet side voltage transformer. The inner wall of the isolation switch chamber is provided with a thin-wall area, the outer side of the isolation switch chamber is provided with a pressure relief port, and the outer side of the left insulator is provided with a resonance elimination resistor or a zero sequence voltage transformer. According to the utility model, an external voltage transformer and an external power-taking transformer are omitted, and the purposes of simple structure, low cost and small size are achieved.

Description

Technical Field

[0001] The utility model relates to an outdoor high-voltage vacuum switch, in particular to an outdoor high-voltage vacuum circuit breaker with a voltage transformer. Background Art

[0002] At present, the structural features of the known outdoor high-voltage vacuum switch are as follows:

[0003] For the needs of providing power for the operating mechanism and measuring voltage of the existing outdoor high-voltage vacuum switch, a three-phase voltage transformer is externally placed to measure three-phase voltage, zero-sequence voltage and take power. A single-phase voltage transformer is also externally placed on the outgoing side of the ring network connection circuit for taking power alone. This installation structure is very complex, with high cost, and the safety of the voltage transformer is reduced when it is exposed to the atmospheric environment.

[0004] To solve the above problems, there is also a solution of embedding the voltage transformer. However, due to the lack of strict electric field analysis and special design, the voltage transformer is directly placed in the switch box. Due to serious distortion of the electric field, the local electric field intensity is too high and exceeds the withstand strength, and various insulation breakdown accidents frequently occur soon, resulting in serious adverse consequences.

[0005] To solve the above problems, there is also a solution of placing a plug-in shielding type voltage transformer in the switch body. The primary wire of the voltage transformer is connected to the primary circuit of the switch body by an internal and external cone seal (with a silicone rubber flexible seal placed in the middle), and a semi-conductive material is sprayed on the outer surface of the voltage transformer for electric field shielding, which solves the above problems, but the structure is complex and the cost is high. Content of the Utility Model

[0006] For the above defects and problems existing in the prior art, the utility model provides a solution in which a voltage transformer with a simple structure is embedded in an insulator, which has the characteristics of simple structure, small volume, convenient installation, low cost, safety and reliability, etc.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] An outdoor high-voltage vacuum switch includes a left insulator casting part 25 and a right insulator casting part 14. When the left insulator casting part 25 is cast, a voltage transformer core 25-3 on the incoming line side, a voltage transformer coil 25-4, a first fuse 25-6, etc. are pre-embedded. The left insulator casting part 25 also reserves an inner conical cavity 25-1, and the bottom is the lead wire of the high-voltage tail end 25-2. Each phase can directly lead out the wire, short-circuit it, and then ground it through a harmonic elimination resistor 24 for harmonic elimination. When grounding for harmonic elimination through a zero-sequence voltage transformer 33, the inner conical cavity 25-1 is connected in a mating manner with the outer cone of the zero-sequence voltage transformer 33 and sealed and insulated at the interface with a silica gel sleeve. Due to the space structure limitation of the right insulator casting part 14, the outgoing line side voltage transformer 11 cannot be pre-embedded in the insulator, but an inner conical cavity is reserved, and it is sealed and insulated with the outer cone of the outgoing line side voltage transformer 11 through a flexible silica gel sleeve 11-5. Due to the setting of the inner conical cavity 25-1, the creepage distance is increased, and when the incoming line side voltage transformer conducts an insulation test, the entire voltage transformer coil 25-4 can withstand the rated power frequency withstand voltage.

[0009] In a further embodiment, a phase sequence current transformer 26 on the incoming line side is pre-embedded when the left insulator casting part 25 is cast.

[0010] In a further embodiment, the right insulator casting part 14 is designed with a thin-wall area 14-1 on the inner wall of the disconnector chamber 18, which will break first under pressure to release the pressure. A pressure relief port 10 is provided at the same position outside the thin-wall area 14-1 of the right insulator casting part. When a short circuit occurs inside the disconnector chamber 18 and high-pressure combustion particles are ejected along with the high-temperature and high-pressure gas, since the nozzle of the pressure relief port 18 faces obliquely upward, the burning particulate matter will be ejected obliquely upward, and will not be ejected horizontally or downward, effectively avoiding hurting the personnel under the electric pole where this switch is installed.

[0011] In a further embodiment, an observation window 19 is provided below the disconnector chamber 18, which can conveniently observe the position of the moving contact 12 of the disconnector under the electric pole to avoid misoperation.

[0012] In a further embodiment, a zero-sequence current transformer 15 and a phase sequence current transformer 17 are pre-embedded when the right insulator casting part 14 is cast.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model gives full play to the advantages of epoxy resin casting and eliminates the external voltage transformers on both the incoming and outgoing line sides. An observation window and a pressure relief port are provided, effectively ensuring operation safety and personnel safety. It has the characteristics of simple structure, small volume, low cost, stable performance, and simple operation. Description of the Drawings

[0015] Figure 1 Front view of the outdoor high-voltage vacuum switch, with the disconnector in the open position;

[0016] Figure 2 Left view of the outdoor high-voltage vacuum switch;

[0017] Figure 3 Rear view of the outdoor high-voltage vacuum switch;

[0018] Figure 4 Upper left axial view of the outdoor high-voltage vacuum switch;

[0019] Figure 5 Upper right axial view of the outdoor high-voltage vacuum switch;

[0020] Figure 6 Upper right rear axial view of the outdoor high-voltage vacuum switch;

[0021] Figure 7 For the outdoor high-voltage vacuum switch Figure 3 Cross-sectional view taken along the A-A direction;

[0022] Figure 8 For the outdoor high-voltage vacuum switch Figure 2 Cross-sectional view taken along the B-B direction;

[0023] Figure 9 Upper left axial view of the outdoor high-voltage vacuum switch (with parts 3 and 8 removed);

[0024] Figure 10 Lower left axial view of the outdoor high-voltage vacuum switch (with parts 8 and 7 removed);

[0025] Figure 11 Derived metering type upper left axial view of the outdoor high-voltage vacuum switch;

[0026] Figure 12 Cross-sectional view of the center position of the middle phase of the metering type of the outdoor high-voltage vacuum switch;

[0027] Figure 13 Upper left axial view of the metering type of the outdoor high-voltage vacuum switch (with parts 8 and 34 removed).

[0028] In the figure: 1 - Inlet - side terminal; 2 - Hanger; 3 - Upper cover plate of common type; 4 - Mechanism cover; 5 - Switch operating mechanism; 6 - Outlet - side terminal; 7 - Lower cover plate of common type; 8 - Protective cover; 9 - Handle; 10 - Pressure - relief port; 11 - Outlet - side voltage transformer; 12 - Moving contact of disconnector; 13 - Lighting lamp; 14 - Right insulator casting; 14~1 - Thin - walled area of right insulator casting; 15 - Zero - sequence current transformer; 16 - Static contact of right - hand side isolation; 17 - Phase - sequence current transformer; 18 - Disconnector chamber; 19 - Observation window; 20 - Disconnector shaft; 21 - Insulating pull rod; 22 - Static contact of left - hand side isolation; 23 - Spring finger; 24 - Damping resistor; 25 - Left insulator casting; 25~1 - Inner conical cavity; 25~2 - High - voltage tail - end lead of voltage transformer; 25~3 - Core of voltage transformer; 25~4 - Coil of voltage transformer; 25~5 - High - voltage head - end lead of voltage transformer; 25~6 - First fuse; 26 - Inlet - side phase - sequence current transformer; 27 - Static contact of arc - extinction chamber; 28 - Moving contact of arc - extinction chamber; 29 - Switch main shaft; 30 - Crank arm; 31 - Lever; 32 - Compression spring; 33 - Zero - sequence voltage transformer; 34 - Upper cover plate of metering type; 35 - Lower cover plate of metering type; 36 - Plug - in current transformer. Detailed implementation manners

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] According to Figures 1 to 13 As shown, the present utility model provides an outdoor high - voltage vacuum switch, including a left insulator casting 25 and a right insulator casting 14 for casting parts:

[0032] The left insulator casting 25 is embedded with the incoming line side voltage transformer core 25-3, the voltage transformer coil 25-4, the high-voltage leading wire 25-5 of the voltage transformer, the high-voltage trailing wire 25-2 of the voltage transformer, and the first fuse 25-6. The voltage transformer coil 25-4 is wound around the incoming line side voltage transformer core 25-3. The high-voltage leading wire 25-5 and the high-voltage trailing wire 25-2 of the voltage transformer are respectively connected to the head and tail ends of the voltage transformer coil 25-4. The first fuse 25-6 is connected to the high-voltage leading wire 25-5 of the voltage transformer. The left insulator casting 25 also reserves an inner conical cavity 25-1, and the leading end of the high-voltage trailing wire 25-2 of the voltage transformer is fixed at the bottom of the inner conical cavity 25-1;

[0033] The outgoing line side voltage transformer 11 is installed above the right insulator casting 14. The isolating switch chamber 18 is provided below the right insulator casting 14. The inner wall of the isolating switch chamber 18 is provided with a thin-wall area 14-1, and a pressure relief port 10 is provided on the outer side at the same position of the thin-wall area 14-1. An inner conical cavity is reserved in the upper right part of the right insulator casting 14, and the inner conical cavity and the outer cone of the outgoing line side voltage transformer 11 are sealed and insulated through a flexible silica gel sleeve 11-5.

[0034] In this actual mode, the left insulator casting 25 also embeds the incoming line side phase sequence current transformer 26 at the same time. The right insulator casting 14 embeds the zero-sequence current transformer 15 and the phase sequence current transformer 17.

[0035] A transparent observation window 19 and a lighting lamp 13 for illuminating the isolating switch chamber 18 are provided at the bottom of the isolating switch chamber 18. A protective cover 8 for sealing and protecting the damping resistor or zero-sequence voltage transformer is provided on the left side surface of the left insulator casting 25.

[0036] An arc extinguishing chamber static contact 27 and an arc extinguishing chamber moving contact 28 for cooperating to connect or disconnect the load current and short-circuit current are arranged above the right of the incoming line side voltage transformer core 25-3. The arc extinguishing chamber static contact 27 is connected to the incoming line side terminal 1, and the arc extinguishing chamber moving contact 28 is electrically connected to the left isolating static contact 22 through a spring finger 23.

[0037] An insulating pull rod 21 for driving its action is arranged at the right end of the arc extinguishing chamber moving contact 28. The right end of the insulating pull rod 21 is rotatably connected to a lever 31. The other end of the lever 31 is rotatably connected to an elbow arm 30. A compression spring 32 is arranged on the elbow arm 30, and a switch main shaft 29 for driving the arc extinguishing chamber moving contact 28 to act is arranged at the other end of the elbow arm 30.

[0038] The outgoing line side voltage transformer 11 includes a voltage transformer iron core 11-1 and a voltage transformer winding 11-2. The voltage transformer winding 11-2 is connected to a second fuse 11-4 through a voltage transformer high-voltage leading wire 11-3, and the other end of the second fuse 11-4 is electrically connected to the outgoing line side terminal 6.

[0039] In the disconnecting switch chamber 18, a disconnecting switch moving contact 12 for connecting or disconnecting an electric conduction circuit and isolating voltage is provided. A right-side isolating static contact 16 for electrically connecting with the disconnecting switch moving contact 12 is provided on the right side of the disconnecting switch moving contact 12. The disconnecting switch moving contact 12 is arranged on a disconnecting switch shaft 20 that drives its rotation.

[0040] Above the left insulator casting 25, a plug-in current transformer 36 connected in series in the primary circuit is provided, and a zero-sequence voltage transformer 33 or a harmonic suppression resistor 24 is provided outside the inner conical cavity 25-1.

[0041] Since all high-voltage conductors are buried in the insulator or sealed with silicone during operation and are no longer exposed to the air, the safety during operation is greatly improved, and the volume is reduced and the cost is lowered.

[0042] The specific functions and roles of the components of the present utility model are as follows:

[0043] (1) The incoming line side terminal 1 - is used for connecting the power supply side wire;

[0044] (2) The hanger 2 - is used for fixing and hoisting;

[0045] (3) The ordinary upper cover plate 3 - is used for upper part protection and sealing;

[0046] (4) The mechanism cover 4 - is used for protecting and sealing the switch mechanism;

[0047] (5) The switch operating mechanism 5 - is used for driving the switch to close and open;

[0048] (6) The outgoing line side terminal 6 - is used for connecting the load side wire;

[0049] (7) The ordinary lower cover plate 7 - is used for bottom protection and sealing;

[0050] (8) The protective cover 8 - is used for protecting and sealing the harmonic suppression resistor or the zero-sequence voltage transformer;

[0051] (9) The handle 9 - is used for manual handling;

[0052] (10) The pressure relief port 10 - is used for the directional discharge of the deflagration gas during internal faults to prevent injury to people;

[0053] (11) The outgoing line side voltage transformer 11 - is used for taking power and measurement when there is reverse power transmission on the outgoing line side;

[0054] (11~1) Voltage transformer core 11~1 - Outlet side voltage transformer core;

[0055] (11~2) Voltage transformer winding 11~2 - Outlet side voltage transformer winding;

[0056] (11~3) High - voltage leading wire of voltage transformer 11~3 - Leading wire at the first end of the high - voltage winding of the outlet side voltage transformer;

[0057] (11~4) Second fuse 11~4 - Used to protect the outlet side voltage transformer;

[0058] (11~5) Silicone sleeve 11~5 - Used for sealing and insulation between the outer cone of the outlet side voltage transformer and the inner cone of the insulator casting part 14;

[0059] (12) Isolator moving contact 12 - Used to connect or disconnect the conductive circuit and isolate the voltage;

[0060] (13) Lighting lamp 13 - Used to illuminate the isolator compartment 18;

[0061] (14) Right insulator casting part 14 - Fixes and supports each component and plays an insulating role;

[0062] (14 - 1) Thin - walled area of the right insulator casting part 14~1 - First breaks under pressure to release pressure;

[0063] (15) Zero - sequence current transformer 15 - Used to measure zero - sequence current;

[0064] (16) Right - hand side isolating static contact 16 - Used to connect electrically with the isolator moving contact (12);

[0065] (17) Phase - sequence current transformer 17 - Used for detecting phase - sequence current for measurement and protection;

[0066] (18) Isolator compartment 18 - Used to place the isolator;

[0067] (19) Observation window 19 - Used to observe the isolator under the pole;

[0068] (20) Isolator shaft 20 - Used to drive the rotation of the isolator moving contact (12);

[0069] (21) Insulating pull rod 21 - Used to drive the movement of the arc - extinguishing chamber moving contact (28);

[0070] (22) Left - hand side isolating static contact 22 - Used to connect electrically with the isolator moving contact (12);

[0071] (23) Spring finger 23 - Used for electrical connection between the arc - extinguishing chamber moving contact (28) and the left - hand side isolating static contact (22);

[0072] (24) Damping resistor 24 - A varistor used to suppress resonance;

[0073] (25) Left insulator casting 25 - Fixes and supports each component and plays an insulating role;

[0074] (25~1) Inner conical cavity 25~1 - Increases the creepage distance, cooperates with the outer cone to play an interface insulation role, and is used to cooperate with and press the outer conical surface of the zero-sequence voltage transformer (33) to enhance insulation;

[0075] (25~2) High-voltage tail lead of voltage transformer 25~2 - The wire that leads the high-voltage tail of the in-line embedded voltage transformer to the inner conical cavity (25~1);

[0076] (25~3) Core of voltage transformer 25~3 - The core used for the in-line embedded voltage transformer;

[0077] (25~4) Coil of voltage transformer 25~4 - The high-voltage side coil used for the in-line embedded voltage transformer;

[0078] (25~5) High-voltage head lead of voltage transformer 25~5 - The wire that leads the high-voltage head of the in-line embedded voltage transformer to the first fuse (25~6);

[0079] (25~6) First fuse 25~6 - Used to protect the voltage transformer and prevent overcurrent;

[0080] (26) In-line phase sequence current transformer 26 - Detects the phase sequence current for measurement and protection;

[0081] (27) Static contact of arc extinguishing chamber 27 - Cooperates with the moving contact of the arc extinguishing chamber (28) to connect or disconnect the load current and short-circuit current;

[0082] (28) Moving contact of arc extinguishing chamber 28 - Cooperates with the static contact of the arc extinguishing chamber (27) to connect or disconnect the load current and short-circuit current;

[0083] (29) Switch main shaft 29 - Drives the moving contact of the arc extinguishing chamber (28) to move;

[0084] (30) Rocker arm 30 - For transmission

[0085] (31) Lever 31 - For transmission;

[0086] (32) Compression spring 32 - Keeps sufficient pressure between the moving contact of the arc extinguishing chamber (28) and the static contact of the arc extinguishing chamber (27);

[0087] (33) Zero-sequence voltage transformer 33 - Measures zero-sequence voltage and eliminates harmonics;

[0088] (34) Metering upper cover plate 34 - Used for the upper protection and sealing of the metering switch;

[0089] (35) Metering lower cover plate 35 - Used for the lower protection and sealing of the metering switch;

[0090] (36) Plug - in current transformer 36 - Connected in series in the primary circuit, increasing the number of turns of the primary winding for current measurement.

[0091] The following further describes the present utility model in conjunction with the attached Figure 1 ~attached Figure 13 drawings and specific embodiments:

[0092] 1. Structural key points of the technical solution of the present utility model:

[0093] ①Embed all the high - voltage tail - end leads 25 - 2 of the incoming - line side voltage transformer, the voltage transformer iron core 25 - 3, the voltage transformer coil 25 - 4, the high - voltage head - end leads 25 - 5 of the voltage transformer, the first fuse 25 - 6, etc. in the left insulator casting 25. One end of the high - voltage tail - end lead 25 - 2 of the voltage transformer, which is the only one exposed to the air, is located at the bottom of the inner conical cavity 25. During actual operation, this terminal is grounded through the harmonic elimination resistor 24 or the zero - sequence voltage transformer 33. This ensures that all high - voltage conductive parts are wrapped by the left insulator casting 25 during operation, isolating the air and ensuring safety during operation;

[0094] ②There is a thin - walled area 14 - 1 of the right insulator casting on the inner wall of the disconnector chamber 18. When an electrical short - circuit explosion occurs in the disconnector chamber 18, this area is first broken through to release pressure outward. A pressure relief port 10 is provided on the outside at the same position, with the opening facing obliquely upward, guiding the airflow and combustion particles to spray obliquely upward to avoid hurting people;

[0095] ③A transparent observation window 19 is provided at the bottom of the disconnector chamber 18, facilitating the staff to observe the state of the disconnector moving contact 12 under the pole and avoiding misoperation;

[0096] ④Due to structural limitations, each component of the outgoing - line side voltage transformer 11 cannot be embedded in the right insulator casting 14, but a silica gel sleeve 11 - 5 is provided between the inner and outer cones for sealing and insulation. Since the outgoing - line side voltage transformer 11 is an optional accessory, it is also convenient for installation and replacement.

[0097] 2. Switch closing and opening process:

[0098] ①As shown in the attached Figure 8 drawing, the switch is in the closed state and the disconnector is in the open state.

[0099] ②When the switch opens, the switch main shaft 29 rotates counterclockwise by a certain angle (see the attached Figure 8) It drives the swing arm 30 to rotate synchronously, drives the lever 31 to rotate through the compression spring 32 and accessories, and finally drives the insulating pull rod 21 to move to the right, driving the moving contact 28 of the arc extinguishing chamber to also move to the right to complete the opening operation. The closing process is the opposite.

[0100] ③ Under the action of the operating mechanism, the disconnector shaft 20 rotates clockwise by 90 degrees (see the appendix Figure 8 ), and the moving contact 12 of the disconnector rotates to the horizontal position and is respectively connected to the right isolating static contact 16 and the left isolating static contact 22 to complete the closing operation. The opening process is the opposite.

[0101] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the above embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0102] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An outdoor high-voltage vacuum switch, characterized in that: The casting parts include a left insulator casting part (25) and a right insulator casting part (14): The left insulator casting (25) is pre-buried with the voltage transformer core (25-3) on the incoming line side, the voltage transformer coil (25-4), the voltage transformer high-voltage head end lead (25-5), the voltage transformer high-voltage tail end lead (25-2), and the first fuse (25-6). The voltage transformer coil (25-4) is wound on the voltage transformer core (25-3) on the incoming line side. ~5), the voltage transformer high-voltage tail lead (25~2) is respectively connected to the head and tail ends of the voltage transformer coil (25~4), the first fuse (25~6) is connected to the voltage transformer high-voltage head lead (25~5), the left insulator casting (25) also reserves an inner cone cavity (25~1), and the lead-out end of the voltage transformer high-voltage tail lead (25~2) is fixed to the bottom of the inner cone cavity (25~1); An outgoing line voltage transformer (11) is installed above the right insulator casting (14), an isolating switch chamber (18) is provided below the right insulator casting (14), a thin-walled area (14-1) is provided on the inner wall of the isolating switch chamber (18), a pressure relief port (10) is provided on the outer side of the thin-walled area (14-1) at the same position, an inner cone cavity is reserved at the upper right part of the right insulator casting (14), and the inner cone cavity and the outer cone of the outgoing line voltage transformer (11) are sealed and insulated by a flexible silicone sleeve (11-5).

2. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: The left insulator casting (25) also pre-buries an incoming line side phase sequence current transformer (26).

3. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: The right insulator casting (14) is pre-buried with a zero-sequence current transformer (15) and a phase-sequence current transformer (17).

4. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: The bottom of the isolating switch room (18) is provided with a transparent observation window (19) and a lighting lamp (13) for illuminating the isolating switch room (18), and the left side surface of the left insulator casting (25) is provided with a protective cover (8) for sealing and protecting the detuning resistor or the zero-sequence voltage transformer.

5. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: An arc extinguishing chamber static contact (27) and an arc extinguishing chamber moving contact (28) for connecting or disconnecting load current and short-circuit current are arranged on the upper right of the incoming line side voltage transformer core (25-3); the arc extinguishing chamber static contact (27) is connected to the incoming line side terminal (1); and the arc extinguishing chamber moving contact (28) is electrically connected to the left side isolating static contact (22) via a spring contact finger (23).

6. An outdoor high-voltage vacuum switch according to claim 5, characterized in that: The right end of the arc extinguishing chamber moving contact (28) is provided with an insulating pull rod (21) for driving the moving contact (28) to move. The right end of the insulating pull rod (21) is rotatably connected to a lever (31). The other end of the lever (31) is rotatably connected to a crank arm (30). A compression spring (32) is provided on the crank arm (30). The other end of the crank arm (30) is provided with a switch main shaft (29) for driving the arc extinguishing chamber moving contact (28) to move.

7. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: The outgoing line voltage transformer (11) comprises a voltage transformer core (11-1) and a voltage transformer winding (11-2); the voltage transformer winding (11-2) is connected to a second fuse (11-4) via a voltage transformer high voltage head end lead (11-3); and the other end of the second fuse (11-4) is electrically connected to an outgoing line terminal (6).

8. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: The isolating switch chamber (18) is provided with an isolating switch moving contact (12) for connecting or disconnecting a conductive circuit and isolating a voltage. A right isolating static contact (16) for connecting the isolating switch moving contact (12) to conduct electricity is provided on the right side of the isolating switch moving contact (12). The isolating switch moving contact (12) is provided on an isolating switch shaft (20) for driving the isolating switch to rotate.

9. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: A plug-in current transformer (36) connected in series in the primary circuit is arranged above the left insulator casting (25), and a zero-sequence voltage transformer (33) or a detuning resistor (24) is arranged outside the inner cone cavity (25-1).

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