Outdoor high-voltage vacuum switch

Abstract

The invention 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 observation window is connected with the left insulator and the right insulator. 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. An external voltage transformer and an external electricity taking transformer are omitted, and the purposes of simple structure, low cost and small size are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to an outdoor high-voltage vacuum switch, in particular, an outdoor high-voltage vacuum circuit breaker with a voltage transformer. BACKGROUND

[0002] At present, the known outdoor high-voltage vacuum switch has the following structural features:

[0003] In order to provide power supply for the operating mechanism and measure voltage, the existing outdoor high-voltage vacuum switch externally places a three-phase voltage transformer for measuring three-phase voltage, zero sequence voltage and power supply, and externally places a single-phase voltage transformer for power supply at the ring network connection loop outlet side. This way has a very complex installation structure, high cost, and the voltage transformer is exposed to the atmosphere, which reduces the safety.

[0004] In order to solve the above problems, there is a scheme of placing the voltage transformer inside, but 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 strength is too high and exceeds the withstand strength, and various insulation breakdown accidents occur frequently in a short time, causing serious adverse consequences.

[0005] In order to solve the above problems, there is a scheme of placing the voltage transformer inside, but 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 strength is too high and exceeds the withstand strength, and various insulation breakdown accidents occur frequently in a short time, causing serious adverse consequences. SUMMARY

[0006] In order to solve the above problems, there is a scheme of placing the voltage transformer inside, but 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 strength is too high and exceeds the withstand strength, and various insulation breakdown accidents occur frequently in a short time, causing serious adverse consequences.

[0007] To achieve the above object, the present application provides the following technical scheme:

[0008] An outdoor high-voltage vacuum switch comprises a left insulator casting part 25 and a right insulator casting part 14. The left insulator casting part 25 is cast with a line-in voltage transformer core 25-3, a voltage transformer coil 25-4, a fuse 25-6 and the like. The left insulator casting part 25 further has an inner cone cavity 25-1, a high-voltage tail end 25-2 lead at the bottom, and each phase can be directly led out, short-circuited and grounded through a harmonic elimination resistor 24 for harmonic elimination. When the harmonic elimination is performed through a zero-sequence voltage transformer 33, the inner cone cavity 25-1 is connected with an outer cone of the zero-sequence voltage transformer 33 and is sealed and insulated by a silica gel sleeve. The right insulator casting part 14 cannot have a line-out voltage transformer 11 embedded in the insulator due to the limitation of the space structure, but has an inner cone cavity and is sealed and insulated with an outer cone of the line-out voltage transformer 11 through a flexible silica gel sleeve 11-5. Since the inner cone cavity 25-1 is provided, the creepage distance is increased, and the entire voltage transformer coil 25-4 can bear the rated power frequency withstand voltage during the insulation test of the line-in voltage transformer.

[0009] In further embodiments, the left insulator casting part 25 is cast with a line-in phase sequence current transformer 26.

[0010] In further embodiments, 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 is broken first to release pressure when compressed. 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 in the disconnector chamber 18, high-voltage combustion particles are ejected along with high-temperature and high-pressure gas. Since the ejection port of the pressure relief port 18 is directed obliquely upward, the combustion particles are also ejected obliquely upward, and cannot be ejected horizontally or downward, effectively avoiding injury to personnel below the electric pole on which the switch is installed.

[0011] In further embodiments, an observation window 19 is provided below the disconnector chamber 18, so that the position of the moving contact 12 of the disconnector can be observed conveniently below the electric pole, avoiding misoperation.

[0012] In further embodiments, the right insulator casting part 14 is cast with a zero-sequence current transformer 15 and a phase sequence current transformer 17.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] The present application takes advantage of the high insulating strength of the epoxy resin casting, and saves the external voltage transformers on both line-in and line-out sides. The observation window and the pressure relief port are provided, effectively ensuring the operation safety and the safety of nearby personnel. The present application has the characteristics of simple structure, small size, low cost, stable performance and simple operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the outdoor high-voltage vacuum switch, and the disconnector is in the open position;

[0016] Figure 2 is a left view of the outdoor high-voltage vacuum switch;

[0017] Figure 3 is a back view of the outdoor high-voltage vacuum switch;

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

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

[0020] Figure 6 is a right upper back axial view of the outdoor high-voltage vacuum switch;

[0021] Figure 7 is an A-A sectional view of the outdoor high-voltage vacuum switch; Figure 3

[0022] Figure 8 is a B-B sectional view of the outdoor high-voltage vacuum switch; Figure 2

[0023] is a left upper axial view of the outdoor high-voltage vacuum switch (without part 3, part 8); Figure 9

[0024] Figure 10 is a lower left axial view of the outdoor high-voltage vacuum switch (without part 8, part 7);

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

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

[0027] Figure 13 is a left upper axial view of the outdoor high-voltage vacuum switch of the metering type (without part 8, part 34).

[0028] ​​Fig. 1: 1 - incoming line side terminal; 2 - hanger; 3 - common type upper cover plate; 4 - mechanism cover; 5 - switch operating mechanism; 6 - outgoing line side terminal; 7 - common type lower cover plate; 8 - protective cover; 9 - handle; 10 - pressure relief port; 11 - outgoing line side voltage transformer; 12 - disconnecting switch movable contact; 13 - illuminating lamp; 14 - right insulator cast part; 14-1 - thin wall area of right insulator cast part; 15 - zero sequence current transformer; 16 - right side isolating stationary contact; 17 - phase sequence current transformer; 18 - disconnecting switch chamber; 19 - observation window; 20 - disconnecting switch shaft; 21 - insulating pull rod; 22 - left side isolating stationary contact; 23 - spring contact finger; 24 - harmonic elimination resistor; 25 - left insulator cast part; 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 - fuse; 26 - incoming line side phase sequence current transformer; 27 - arc chamber stationary contact; 28 - arc chamber movable contact; 29 - switch main shaft; 30 - crank arm; 31 - lever; 32 - compression spring; 33 - zero sequence voltage transformer; 34 - metering type upper cover plate; 35 - metering type lower cover plate; 36 - plug-in type current transformer. DETAILED DESCRIPTION

[0029] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] According to Figures 1-13 As shown in the drawings, the present application provides an outdoor high voltage vacuum switch, which comprises a left insulator cast part 25 and a right insulator cast part 14 for casting parts:

[0032] The left insulator cast part 25 is pre-buried with an incoming line side voltage transformer core 25-3, a voltage transformer coil 25-4, a voltage transformer high voltage first end lead 25-5, a voltage transformer high voltage tail end lead 25-2, and a fuse 25-6. The voltage transformer coil 25-4 is wound on the incoming line side voltage transformer core 25-3. The voltage transformer high voltage first end lead 25-5 and the voltage transformer high voltage tail end lead 25-2 are connected to the first and second ends of the voltage transformer coil 25-4 respectively. The first fuse 25-6 is connected to the voltage transformer high voltage first end lead 25-5. The left insulator cast part 25 further has a left inner cone cavity 25-1. The outgoing end of the voltage transformer high voltage tail end lead 25-2 is fixed at the bottom of the left inner cone cavity 25-1.

[0033] The right insulator cast part 14 is provided with an outgoing line side voltage transformer 11 above. The right insulator cast part 14 is provided with a disconnecting switch chamber 18 below. The inner wall of the disconnecting switch chamber 18 is provided with a thin wall area 14-1. The thin wall area 14-1 is provided with a pressure relief port 10 at the same position outside. The right insulator cast part 14 is provided with an inner cone cavity at the upper right part. The inner cone cavity is sealed and insulated from the outer cone of the outgoing line side voltage transformer 11 by a flexible silica gel sleeve 11-5.

[0034] In the embodiment, the left insulator cast part 25 is also pre-buried with an incoming line side phase sequence current transformer 26. The right insulator cast part 14 is pre-buried with a zero sequence current transformer 15 and a phase sequence current transformer 17.

[0035] The bottom of the disconnecting switch chamber 18 is provided with a transparent observation window 19 and a lighting lamp 13 for illuminating the disconnecting switch chamber 18. The left side of the left insulator cast part 25 is provided with a protective cover 8 for sealing and protecting the harmonic elimination resistor or the zero sequence voltage transformer.

[0036] The upper right part of the incoming line side voltage transformer core 25-3 is provided with an arc chamber static contact 27 and an arc chamber dynamic contact 28 for switching on or off the load current and the short circuit current. The arc chamber static contact 27 is connected to the incoming line side terminal 1. The arc chamber dynamic contact 28 is electrically connected to the left side isolation static contact 22 through a spring contact finger 23.

[0037] The right end of the arc chamber dynamic contact 28 is provided with an insulating pull rod 21 for driving the action of the arc chamber dynamic contact 28. The right end of the insulating pull rod 21 is rotationally connected to a lever 31. The other end of the lever 31 is rotationally connected to a crank arm 30. The crank arm 30 is provided with a compression spring 32. The other end of the crank arm 30 is fixed on a switch main shaft 29 for driving the action of the arc chamber dynamic contact 28.

[0038] The outgoing line side 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 with the second fuse 11-4 through a voltage transformer high-voltage first end lead 11-3. The other end of the fuse 11-4 is electrically connected with the outgoing line side terminal 6.

[0039] The isolating switch movable contact 12 is arranged in the isolating switch chamber 18 for connecting or disconnecting the conductive circuit and isolating voltage. The right side isolating fixed contact 16 for connecting the isolating switch movable contact 12 is arranged at the right side of the isolating switch movable contact 12. The isolating switch movable contact 12 is arranged on the isolating switch shaft 20 for driving the rotation of the isolating switch movable contact 12.

[0040] The upper side of the left insulator pouring part 25 is provided with the plug-in type current transformer 36 (see the attached Figure 12 ) connected in series in the primary circuit. The outer side of the inner conical cavity 25-1 is provided with the zero sequence voltage transformer 33 (see the attached Figure 10 ) or the harmonic elimination resistor 24 (see the attached Figure 9 ).

[0041] Since all the high-voltage conductors are buried in the insulator or sealed by silica gel and are not exposed to the air during operation, 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 application are as follows:

[0043] (1) The incoming line side terminal 1 is used for connecting the power side conductive wire.

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

[0045] (3) The ordinary type upper cover plate 3 is used for upper 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 conductive wire.

[0049] (7) The ordinary type 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 elimination resistor or the zero sequence voltage transformer.

[0051] (9) The handle 9 is used for manual carrying.

[0052] (10) The pressure relief port 10 is used for directional discharge of the explosion gas during internal fault to prevent injury.

[0053] (11) Outgoing line side voltage transformer 11 - for power supply and measurement when outgoing line side voltage transformer is fed back;

[0054] (11-1) Voltage transformer core 11-1 - outgoing line side voltage transformer core;

[0055] (11-2) Voltage transformer winding 11-2 - outgoing line side voltage transformer winding;

[0056] (11-3) Voltage transformer high voltage first end lead 11-3 - outgoing line side voltage transformer high voltage winding first end lead;

[0057] (11-4) Fuse 11-4 - for protecting outgoing line side voltage transformer;

[0058] (11-5) Silicone sleeve 11-5 - for sealing between outgoing line side voltage transformer outer cone and inner cone of insulator pouring part 14;

[0059] (12) Moving contact of disconnecting switch 12 - for connecting or disconnecting conductive loop and isolating voltage;

[0060] (13) Illumination lamp 13 - for illuminating disconnecting switch room 18;

[0061] (14) Right insulator pouring part 14 - for fixing and supporting various components and for insulation;

[0062] (14-1) Thin wall area of right insulator pouring part 14-1 - for breaking first to release pressure when under pressure;

[0063] (15) Zero sequence current transformer 15 - for measuring zero sequence current;

[0064] (16) Right side isolating static contact 16 - for connecting with moving contact of disconnecting switch (12) for conduction;

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

[0066] (18) Disconnecting switch room 18 - for placing disconnecting switch;

[0067] (19) Observation window 19 - for observing disconnecting switch from below electric pole;

[0068] (20) Disconnecting switch shaft 20 - for driving moving contact of disconnecting switch (12) to rotate;

[0069] (21) Insulating pull rod 21 - for driving moving contact of arc extinguishing chamber (28) to move;

[0070] (22) Left side isolating static contact 22 - for connecting with moving contact of disconnecting switch (12) for conduction;

[0071] (23) Spring contact finger 23 - used to electrically connect the moving contact (28) of the arc extinguishing chamber to the left side isolated static contact (22);

[0072] (24) Resistor for eliminating resonance 24 - a pressure sensitive resistor used to eliminate resonance;

[0073] (25) Left side insulator 25 - used to fix and support various parts and to provide insulation;

[0074] (25-1) Inner cone cavity 25-1 - used to increase the creepage distance and to provide interface insulation in cooperation with the outer cone, and to press and strengthen the insulation in cooperation with the outer cone of the zero sequence voltage transformer (33);

[0075] (25-2) Voltage transformer high voltage tail lead 25-2 - a lead wire for the high voltage tail end of the voltage transformer embedded on the incoming line side and leading into the inner cone cavity (25-1);

[0076] (25-3) Voltage transformer core 25-3 - a core for the voltage transformer embedded on the incoming line side;

[0077] (25-4) Voltage transformer coil 25-4 - a high voltage side coil for the voltage transformer embedded on the incoming line side;

[0078] (25-5) Voltage transformer high voltage head lead 25-5 - a lead wire for the high voltage head end of the voltage transformer embedded on the incoming line side and leading into the fuse (25-6);

[0079] (25-6) Fuse 25-6 - used to protect the voltage transformer from overcurrent;

[0080] (26) Incoming line side phase sequence current transformer 26 - used to detect the phase sequence current for measurement and protection;

[0081] (27) Arc extinguishing chamber static contact 27 - used to cooperate with the arc extinguishing chamber moving contact (28) to make or break the load current and short circuit current;

[0082] (28) Arc extinguishing chamber moving contact 28 - used to cooperate with the arc extinguishing chamber static contact (27) to make or break the load current and short circuit current;

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

[0084] (30) Crank arm 30 - used for transmission;

[0085] (31) Lever 31 - used for transmission;

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

[0087] (33) Zero sequence voltage transformer 33 - for measuring zero sequence voltage and suppressing resonance;

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

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

[0090] (36) Plug-in current transformer 36 - connected in series in primary circuit, increasing turns of primary winding, for measuring current.

[0091] The present application will be further described below in conjunction with the accompanying drawings: Figure 1 ~ accompanying Figure 13 and specific embodiments:

[0092] 1. The structural key points of the technical scheme of the present application:

[0093] ① The high-voltage tail end lead 25-2, the voltage transformer core 25-3, the voltage transformer coil 25-4, the high-voltage head end lead 25-5, the fuse 25-6, etc. of the incoming line side voltage transformer are all pre-buried in the left insulator casting 25. The only end of the voltage transformer high-voltage tail end lead 25-2 exposed to the air is located at the bottom of the inner cone cavity 25-1. In actual operation, this terminal is grounded through the anti-resonance resistor 24 or the zero sequence voltage transformer 33, and is in a low-voltage state. This ensures that all high-voltage conductive parts are wrapped by the left insulator casting 25 during operation, isolating the atmosphere and ensuring safety during operation.

[0094] ② A thin-walled area 14-1 of the right insulator casting is provided on the inner wall of the disconnecting chamber 18. When an electrical short circuit explosion occurs in the disconnecting chamber 18, this area is first broken and pressure is released outward. A pressure relief port 10 is provided on the outside of the same position, with the opening facing obliquely upward to guide the airflow and burning particles to be ejected obliquely upward, avoiding injury to people;

[0095] ③ A transparent observation window 19 is provided at the bottom of the disconnecting chamber 18 to facilitate the observation of the status of the moving contact 12 of the disconnecting switch by the staff below the pole, avoiding misoperation.

[0096] Due to structural limitations, the various components of the outgoing line side voltage transformer 11 cannot be pre-buried 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] ① Figure 8 The switch is in the closed state, and the disconnecting switch is in the open state.

[0099] When the switch is opened, the main shaft 29 rotates anticlockwise by a certain angle (see Fig. 2), driving the crank arm 30 to rotate synchronously, and through the compression spring 32 and its accessories, the lever 31 is driven to rotate, finally driving the insulating pull rod 21 to move to the right, driving the moving contact 28 of the arc extinguishing chamber to move to the right, completing the opening. The closing process is the opposite. Figure 8

[0100] When the operating mechanism acts, the isolating switch shaft 20 rotates clockwise by 90 degrees (see Fig. 3), and the isolating switch moving contact 12 is turned to the horizontal position, respectively connected with the right isolating static contact 16 and the left isolating static contact 22, completing the closing. The opening process is the opposite. Figure 8

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

[0102] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.​​

Claims

1. An outdoor high-voltage vacuum switch, characterized in that, Including the left insulator casting part (25) and the right insulator casting part (14) of the casting components: The left insulator casting component (25) pre-embeds the incoming-side voltage transformer core (25-3), voltage transformer coil (25-4), voltage transformer high-voltage start-end lead (25-5), voltage transformer high-voltage end-end lead (25-2), and fuse (25-6). The voltage transformer coil (25-4) is wound on the incoming-side voltage transformer core (25-3), and the voltage transformer high-voltage start-end lead (25-5) is... 5) The high voltage tail end lead (25-2) of the voltage transformer is connected to the first and last ends of the voltage transformer coil (25-4) respectively. The first fuse (25-6) is connected to the high voltage head end lead (25-5) of the voltage transformer. The left insulator casting part (25) also has a reserved inner cone cavity (25-1). The lead-out end of the high voltage tail end lead (25-2) of the voltage transformer is fixed at the bottom of the inner cone cavity (25-1). A voltage transformer (11) on the outgoing side is installed above the right insulator casting part (14). A disconnecting switch chamber (18) is provided below the right insulator casting part (14). A thin-walled area (14-1) is provided on the inner wall of the disconnecting 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 conical cavity is reserved in the upper right part of the right insulator casting part (14). The inner conical cavity and the outer cone of the outgoing side voltage transformer (11) are sealed and insulated by a flexible silicone sleeve (11-5).

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

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

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

5. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: The upper right side of the input voltage transformer core (25-3) is provided with an arc-extinguishing chamber stationary contact (27) and an arc-extinguishing chamber moving contact (28) for connecting or disconnecting load current and short-circuit current. The arc-extinguishing chamber stationary contact (27) is connected to the input terminal (1), and the arc-extinguishing chamber moving contact (28) is electrically connected to the left isolation stationary contact (22) through a spring contact finger (23).

6. An outdoor high-voltage vacuum switch according to claim 5, characterized in that: An insulating pull rod (21) for driving the arc-extinguishing chamber moving contact (28) is provided at the right end. 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). A switch spindle (29) for driving the arc-extinguishing chamber moving contact (28) is provided at the other end of the crank arm (30).

7. An outdoor high-voltage vacuum switch according to claim 1, characterized in that: The voltage transformer (11) on the outgoing side includes 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) through a voltage transformer high-voltage lead (11-3). The other end of the fuse (11-4) is electrically connected to the outgoing side 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 the conductive circuit and isolating voltage. To the right of the isolating switch moving contact (12) is a right isolating stationary contact (16) for connecting and conducting electricity with the isolating switch moving contact (12). The isolating switch moving contact (12) is mounted on the isolating switch shaft (20) that drives its rotation.

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

Images