Rotary disconnecting switch and multi-pole disconnecting switch

Abstract

The utility model relates to the technical field of switching devices, in particular to a rotary isolating switch, which comprises a base, the base comprises a side wall part which is enclosed into a closed frame-shaped structure, two static contacts arranged on the inner side of the side wall part, a rotating piece and two moving contacts arranged at two radial ends of the rotating piece, the two moving contacts are driven by the rotating piece to rotate so as to achieve on-off matching of the two moving contacts and the two static contacts, a plane perpendicular to a rotating shaft of the rotating piece is defined as a reference plane, the projection of the side wall part on the reference plane is defined as a base outer frame, and a two-dimensional rectangular coordinate system is constructed on the reference plane. The original point of the two-dimensional rectangular coordinate system is the projection of the rotating shaft of the rotating piece on the reference plane, and the two static contacts are located in the quadrants of two opposite angles in the outer frame of the base respectively. The two static contacts are arranged on the diagonal quadrants, so that the layout of each structural member in the base can be optimized, the arrangement of other structures such as an arc extinguish chamber in the side wall part is more flexible, and the diagonal arrangement of the wiring terminals of the multi-pole isolating switch becomes possible.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of switchgear, and in particular to a rotary disconnecting switch and a multi-pole disconnecting switch. BACKGROUND

[0002] The disconnecting switch can play the role of circuit isolation and on-off control in the circuit system, the operating part of the rotary disconnecting switch is rotary, the movable contact is connected to the operating part and rotates with the operating part, so that the movable contact and the static contact form opening and closing cooperation. With the development of technology, the working current of the disconnecting switch gradually increases, and the electrical isolation requirement between the movable contact and the static contact also increases, and the existing small disconnecting switch cannot meet the requirement. In the existing rotary disconnecting switch, the movable contact and the static contact are usually arranged on a rectangular structure base, and the two static contacts are arranged opposite along the direction basically parallel to the side wall, and the structure is not reasonable, which is not conducive to the arrangement of the arc extinguishing chamber and other structural members. SUMMARY

[0003] The utility model discloses a rotary disconnecting switch and a multi-pole disconnecting switch, which optimizes the structural layout by improving the arrangement of the static contact.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model comprises:

[0005] A rotary disconnecting switch comprises a base, the base comprises a side wall part enclosed into a closed frame structure, two static contacts, a rotating member and two movable contacts arranged at the two ends of the rotating member in the radial direction are arranged on the inner side of the side wall part, the two movable contacts rotate under the driving of the rotating member to realize the opening and closing cooperation of the two movable contacts and the two static contacts, a plane perpendicular to the rotating shaft of the rotating member is defined as a reference plane, the projection of the side wall part on the reference plane is a base outer frame, a two-dimensional rectangular coordinate system is constructed on the reference plane, the origin of the two-dimensional rectangular coordinate system is the projection of the rotating shaft of the rotating member on the reference plane, and the two static contacts are respectively located in two opposite quadrants in the base outer frame.

[0006] In one embodiment, the side wall part is a rectangular frame structure, two coordinate axes of the two-dimensional rectangular coordinate system are respectively parallel to one side of the rectangular frame, and four corners of the rectangular frame are distributed in four quadrants.

[0007] In one embodiment, the static contact is conductively connected to a terminal, the terminal is arranged on the side wall part, and the projections of the two terminals on the reference plane are located in two opposite quadrants, so that the two terminals are diagonally arranged in the rectangular frame.

[0008] In one embodiment, the projection of the conductive connection of the stationary contact and the terminal on the reference plane is in the same quadrant.

[0009] In one embodiment, the stationary contact is connected to a terminal through a conductor, the terminal is arranged on the side wall part, the base includes a bottom plate part connected to the side wall part, the conductor is embedded in the bottom plate part, and the stationary contact is arranged on the bottom plate part and exposed from the bottom plate part.

[0010] In one embodiment, the stationary contact, the conductor and the terminal are integrally connected conductive bodies.

[0011] In one embodiment, the bottom plate part is provided with a contact support in a half-enclosed structure, and the stationary contact is arranged inside the contact support in the half-enclosed structure.

[0012] In one embodiment, the base includes a bottom plate part connected to the side wall part, the stationary contact is mounted on the bottom plate part, and the bottom plate part is movably mounted with an insulating arc separation cover, in the separated state of the stationary contact and the movable contact, the arc separation cover cooperates with the bottom plate part to form an arc separation structure for surrounding the stationary contact, and the arc separation cover is provided with a gap for accommodating the stationary contact to surround the stationary contact in the arc separation cover during movement of the arc separation cover.

[0013] The technical scheme of the utility model further includes:

[0014] A multi-pole disconnector includes a plurality of groups of switches, two movable contacts and two stationary contacts forming a group of the switches, and any group of the switches forming the switch cooperation described above, and any group of the switches being connected to a conductive loop for controlling the switch of the conductive loop.

[0015] In one embodiment, each stationary contact is conductively connected to a terminal, the terminal is exposed from the base, a plurality of groups of the switches are arranged along the axial direction of the rotating member, the projection of the terminal of the same group of switches on the reference plane is respectively located in opposite quadrants, and the projection of the terminal of adjacent groups of switches on the reference plane is distributed on adjacent quadrants.

[0016] The utility model has the beneficial effects that:

[0017] 1. The utility model discloses a static contact is arranged on the diagonal quadrant, makes the distance between two static contacts far, makes the static contact present diagonal arrangement basically, relative to the prior art two static contacts are relatively arranged along the direction basically parallel to the side wall, the layout of two static contacts of diagonal arrangement can optimize each structural member in the base, makes the arrangement of arc extinguishing chamber and other structures in the side wall part more flexible, also makes the wiring terminal diagonal arrangement of multipolar disconnecting switch possible, second, the spacing of two static contacts of diagonal arrangement is bigger, and further makes the rotating radius of moving contact and contact opening distance increase, increases the creepage distance between moving contact and static contact, and it is favorable to improve the electrical isolation performance between contacts of small rotary disconnecting switch.

[0018] 2. Two coordinate axes of two-dimensional rectangular coordinate system are parallel to the side of rectangular frame, therefore the four corners of the side wall part of rectangular frame structure are distributed in four quadrants on the projection of the reference plane, making the static contact present diagonal arrangement basically in the rectangular frame, further optimizing the layout of each structural member in the base.

[0019] 3. The static contact and wiring terminal form the conductive connection through the conductor buried in the bottom plate part, can form the insulation of conductor and outside (not including static contact and wiring terminal) by the insulation performance of bottom plate part, on the one hand prevents the existence of conductor and reduces the creepage distance between moving contact and static contact, on the other hand can make the arrangement of conductor more flexible, for example, the conductor is linearly extended between static contact and wiring terminal to reduce the resistance of conductor, reduces the power loss between static contact and wiring terminal.

[0020] 4, two wiring terminals are diagonally arranged in the base, so that the same polarity (or same phase) wiring terminals of different circuits are arranged staggered, increasing the distance between the wiring terminals.

[0021] 5, the arc extinguishing structure can surround the static contact when moving and static contact breaks, thereby increasing the creepage distance between moving and static contact, preventing the formation of arc connection between the broken moving and static contact. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the perspective view of the utility model embodiment 1.

[0023] Figure 2 It is the view of the projection on the reference plane of the part structure of the utility model embodiment 1 in the closing state.

[0024] Figure 3 It is the view of the projection on the reference plane of the part structure of the utility model embodiment 1 in the opening state.

[0025] Figure 4 It is the view of the projection on the reference plane of the part structure of the utility model embodiment 1.

[0026] Figure 5 is the arc separation cover solid of the embodiment 1 of the utility model Figure 1 .

[0027] Figure 6 is the arc separation cover solid of the embodiment 1 of the utility model Figure 2 .

[0028] Figure 7 is the base outer frame of other embodiments of the utility model.

[0029] Figure 8 is the base outer frame of other embodiments of the utility model.

[0030] Figure 9 is the solid of the embodiment 2 of the utility model Figure 1 .

[0031] Figure 10 is the solid of the embodiment 2 of the utility model Figure 2 .

[0032] Wherein: 1 base, 11 bottom plate part, 12 side wall part, 13 mounting column, 14 rib, 15 contact support, 2 static contact, 3 rotating part, 4 moving contact, 5 wiring terminal, 51 first wiring end, 52 second wiring end, 6 conductor, 7 arc separation cover, 70 let go of mouth, 71 rotating shaft part, 72 first arc separation part, 73 connecting part, 74 second arc separation part, 8 arc extinguishing chamber. DETAILED DESCRIPTION

[0033] To further illustrate each embodiment, the utility model provides with the drawing. These drawings are part of the utility model disclosure, mainly used to illustrate the embodiment, and can cooperate with the relevant description of the specification to explain the operation principle of the embodiment. With reference to these contents, those skilled in the art should understand other possible embodiments and the advantages of the utility model. The components in the drawing are not drawn according to the scale, and similar component symbols are usually used to represent similar components.

[0034] Embodiment 1

[0035] Refer to Figures 1 to 4The utility model discloses a rotary isolator, the rotary isolator of this embodiment includes base 1, base 1 is equipped with two static contacts 2, a rotating part 3 and two moving contacts 4 of setting in the radial of rotating part 3, two moving contacts 4 are rotated under the drive of rotating part 3 to realize the switch cooperation of two moving contacts 4 and two static contacts 2. Base 1 includes bottom plate part 11 and the side wall part 12 of rectangular frame structure, and static contact 2 sets up in the rectangular frame that the side wall part 12 is surrounded to form, and static contact 2 and rotating part 3 are all installed in bottom plate part 11, and rotating part 3 is rotatably installed in bottom plate part 11 and the rotation axis of rotating part 3 extends in the direction that is substantially perpendicular to bottom plate part 11. Define the plane that is perpendicular to the rotation axis of rotating part 3 as reference plane P, and the projection of side wall part 12 of base 1 on reference plane P is base outer frame, and the shape of base outer frame of this embodiment is rectangular frame, and constructs two-dimensional rectangular coordinate system on reference plane P, and the origin O of this two-dimensional rectangular coordinate system is the projection of the rotation axis of rotating part 3 on reference plane, and two coordinate axes X axis and Y axis are parallel to the side of rectangular frame respectively, and this two-dimensional rectangular coordinate system forms four quadrants on reference plane P, and the four corners of rectangular frame are distributed in four quadrants, and the projection of each static contact 2 on reference plane P is located in any quadrant, and the projection of two static contacts 2 on reference plane P is located in two diagonal quadrants. The projection of static contact 2 on reference plane P of this embodiment is located in second quadrant II and fourth quadrant IV respectively, and in other embodiments, the projection of static contact 2 on reference plane P is located in first quadrant I and third quadrant III, therefore, the quadrant where two static contacts 2 are located is not limited, and only requires to be distributed in two diagonal quadrants.

[0036] The utility model discloses a rotary isolator, the rotary isolator of this embodiment includes base 1, base 1 is equipped with two static contacts 2, a rotating part 3 and two moving contacts 4 of setting in the radial of rotating part 3, two moving contacts 4 are rotated under the drive of rotating part 3 to realize the switch cooperation of two moving contacts 4 and two static contacts 2. Base 1 includes bottom plate part 11 and the side wall part 12 of rectangular frame structure, and static contact 2 sets up in the rectangular frame that the side wall part 12 is surrounded to form, and static contact 2 and rotating part 3 are all installed in bottom plate part 11, and rotating part 3 is rotatably installed in bottom plate part 11 and the rotation axis of rotating part 3 extends in the direction that is substantially perpendicular to bottom plate part 11. Define the plane that is perpendicular to the rotation axis of rotating part 3 as reference plane P, and the projection of side wall part 12 of base 1 on reference plane P is base outer frame, and the shape of base outer frame of this embodiment is rectangular frame, and constructs two-dimensional rectangular coordinate system on reference plane P, and the origin O of this two-dimensional rectangular coordinate system is the projection of the rotation axis of rotating part 3 on reference plane, and two coordinate axes X axis and Y axis are parallel to the side of rectangular frame respectively, and this two-dimensional rectangular coordinate system forms four quadrants on reference plane P, and the four corners of rectangular frame are distributed in four quadrants, and the projection of each static contact 2 on reference plane P is located in any quadrant, and the projection of two static contacts 2 on reference plane P is located in two diagonal quadrants. The projection of static contact 2 on reference plane P of this embodiment is located in second quadrant II and fourth quadrant IV respectively, and in other embodiments, the projection of static contact 2 on reference plane P is located in first quadrant I and third quadrant III, therefore, the quadrant where two static contacts 2 are located is not limited, and only requires to be distributed in two diagonal quadrants.

[0037] In addition, two static contacts 2 are diagonally arranged, relative to the prior art two static contacts are relatively arranged along the direction that is substantially parallel to the side wall, under the condition that the size of base is unchanged, the diagonal arrangement of two static contacts 2 is more spaced, and the rotating radius of moving contact 4 and the contact opening distance are increased, the creepage distance between moving contact and static contact is increased, which is beneficial to improve the electrical isolation performance between contacts of small rotary isolator.

[0038] The projections of the two static contacts 2 on the reference plane P are located in two opposite quadrants, and the four corners obtained by projecting the side wall part of the rectangular frame structure on the reference plane P are distributed in four quadrants, so that the two static contacts 2 are arranged along two opposite corners of the side wall part, instead of being arranged in adjacent quadrants, and each static contact is not arranged across two adjacent quadrants (such an arrangement makes the connecting line between the two static contacts be substantially parallel to the side of the rectangle).

[0039] The side wall part 12 of the rectangular frame structure refers to the main structure of the side wall part being in a rectangular frame structure, and the structures such as ribs and grooves formed on the side wall part due to installation or strength requirements do not affect the determination of the rectangular frame structure. For example, in the embodiment, the side wall part is formed in a double-layer structure with a groove in the thickness direction for fixing the terminal, and the outer side of the side wall part 12 is provided with a mounting column 13, a rib 14, a buckle and other structures for the installation of the base, which do not affect the determination of the rectangular frame structure of the side wall part.

[0040] The static contact 2 is conductively connected to a terminal 5, and the terminal 5 is arranged on the side wall part 12. The projections of the two terminals 5 on the reference plane P are located in two opposite quadrants, so that the two terminals 5 are arranged diagonally on the rectangular frame. The diagonal arrangement of the terminal 5 can increase the distance between the terminals 5. When the disconnecting switch is provided with multiple groups of terminals arranged along the axial direction of the rotating member 3, the distance between the terminals of adjacent groups can be increased by arranging the terminals 5 diagonally and staggering the arrangement of the terminals of adjacent groups, so as to prevent electrical connection between different conductive loops.

[0041] In the embodiment, the projections of the conductively connected static contact 2 and terminal 5 on the reference plane are located in the same quadrant, so as to shorten the distance between the static contact 2 and the terminal 5, shorten the conductive path, reduce the impedance, and reduce the power loss on the conductive path.

[0042] The static contact 2 is connected to a terminal 5 through a conductor 6, the terminal 5 is arranged on the side wall 12, the conductor 6 is embedded in the bottom plate 11, and the static contact 2 is arranged on the bottom plate 11 and exposed to the outside. The static contact 2, the conductor 6 and the terminal 5 of the embodiment are integrally connected conductive bodies, and are fixedly installed on the bottom plate 11 by injection molding. The static contact 2 and the terminal 5 are conductively connected through the conductor 6 embedded in the bottom plate 11, and the conductor 6 is insulated from the outside (excluding the static contact and the terminal) by means of the insulation performance of the bottom plate 11, on the one hand, preventing the conductor 6 from reducing the creepage distance between the moving and static contacts, and on the other hand, making the arrangement of the conductor 6 more flexible, so that the static contact 2 and the terminal 5 conductively connected are arranged at the same angle of the rectangular frame structure, and the conductor 6 is arranged in a straight line to reduce the resistance of the conductor 6 and reduce the power loss between the static contact 2 and the terminal 5. In addition, the straight-line extension of the conductor 6 in the bottom plate 11 can also reduce the length of the conductive body (static contact 2, conductor 6 and terminal 5) and reduce the loss of conductive material. The conductive body adopts an integral injection molding structure, which can better fix the static contact 2 and the terminal 5, and avoid the phenomenon that the static contact 2 is offset due to user wiring and other reasons, causing abnormal opening and closing. In other embodiments, the static contact 2, the terminal 5 and the conductor 6 are divided into two parts or three parts, and such a split connection is also feasible, for example, the conductor 6 is integrally injection molded to the base, and the static contact 2 is welded to the conductor 6 to fix the static contact, which can simplify the structure of each part.

[0043] The bottom plate 11 is provided with a contact support 15, which is a half-enclosing structure, and the static contact 2 is arranged inside the half-enclosing contact support 15. The static contact 2 abuts against the contact support 15, which can enhance the stability of the static contact 2 and form a surrounding ring around the static contact 2 to prevent displacement or deformation of the static contact 2, further avoiding the phenomenon that the static contact 2 is offset due to user wiring and other reasons, causing abnormal opening and closing.

[0044] Referring to Figures 1 to 6As shown, the bottom plate part 11 is movably mounted with an insulating arc separation cover 7, in the state of breaking of the static contact 2 and the moving contact 4, the arc separation cover 7 cooperates with the bottom plate part 11 to form an arc separation structure for surrounding the static contact 2, the arc separation cover is provided with a gap 70, the gap 70 is used for giving way to the static contact 2 in the movement process of the arc separation cover 7 to surround the static contact 2 in the arc separation cover 7. The arc separation cover 7 of the embodiment is rotatably mounted on the bottom plate part 11, including a rotating shaft part 71, a first arc separation part 72 extending in a circular arc shape, a connecting part 73 connecting the rotating shaft part 71 and the first arc separation part 72, and a second arc separation part 74 connecting the rotating shaft part 71, the first arc separation part 72 and the connecting part 73, the second arc separation part 74 is arranged at one end of the rotating shaft part 71 away from the bottom plate part 11, so that the arc separation cover 7 forms a cover-shaped structure with an opening facing the bottom plate part 11. The gap 70 is arranged between the rotating shaft part 71 and the first arc separation part 72 and away from the connecting part 73, when the arc separation cover 7 is rotated from the side of the static contact 2 to the state of surrounding the static contact 2, the existence of the gap 70 can make the static contact 2 be surrounded by the arc separation cover 7, so that the arc separation cover 7 cooperates with the bottom plate part 11 to form an arc separation structure for surrounding the static contact 2. Due to the existence of the arc separation structure, the creepage distance between the moving contact 4 and the static contact 2 is increased, the straight line distance between the moving contact 4 and the static contact 2 can be reduced, and the volume of the arc extinguishing grid can be reduced or even not be arranged, so that more space is left on the base 1, and the arrangement of the static contact 2 is more flexible.

[0045] The embodiment extends the arc separation structure to the upper side of the static contact 2 (defining the direction of the static contact 2 relative to the bottom plate part 11 as upper) through the second arc separation part 74 to increase the creepage distance between the moving contact 4 and the static contact 2. In other embodiments, the upper side of the static contact 2 can also be open, that is, the opening of the arc separation structure on the upper side of the static contact 2 is also feasible, and the arc separation structure with an opening on the upper side of the static contact 2 can also increase the creepage distance, in combination with the arrangement of the static contact 2 on the diagonal quadrant, so that the creepage distance between the moving contact 4 and the static contact 2 is sufficient to form electrical isolation.

[0046] The conductor 6 is injection molded in the inside of the base 1, and is the shortest straight line distance from the static contact 2 to the terminal 5. This structure avoids excessive bending of the conductor formed by the connection of the static contact 2, the terminal 5 and the conductor 6, saves cost, and at the same time, the conductor 6 is surrounded by the insulating base, which ensures that the arc is effectively cut by the arc separation cover 7. The contact support 15 is arranged on one side of the static contact 2 and is resisted by the static contact 2 through the structure of the reinforcing rib, so as to ensure that the static contact 2 will not affect the normal opening and closing of the moving and static contacts during the closing process.

[0047] The side wall part 12 of the embodiment is a rectangular frame structure, in other embodiments, the side wall part 12 can also be a closed frame structure of other shapes, for example Figure 7 The illustrated structure of the concave rectangle, or Figure 8The straight side and the arc side are connected to form a closed frame structure, Figure 7 and Figure 8 The two closed frame structures are close to rectangles. The two static contacts 2 and the two terminal posts 5 are diagonally arranged, that is, the electrically connected static contacts 2 and terminal posts 5 are arranged in the same quadrant.

[0048] Embodiment 2

[0049] Referring to Figures 9 to 10 As shown in the figure, the embodiment discloses a multi-pole disconnector, which comprises a plurality of switch groups, two moving contacts and two static contacts form a switch group, and each static contact is electrically connected to a terminal post 5 exposed on the base 1. A switch group is connected to an electric circuit for controlling the switch of the electric circuit, which can be a direct current circuit or different phases of an alternating current circuit. The connection between the terminal post 5, the moving contact, and the static contact and the switch cooperation have been described in detail in Embodiment 1, and will not be repeated here. The two terminal posts 5 of the same switch group are a first terminal post 51 and a second terminal post 52, one of which is an incoming terminal, and the other is an outgoing terminal, for example, the first terminal post 51 is an incoming terminal, and the second terminal post 52 is an outgoing terminal; or vice versa, the first terminal post 51 is an outgoing terminal, and the second terminal post 52 is an incoming terminal.

[0050] According to Embodiment 1, the projections of the terminal posts 5 of the same switch group on the reference plane P are located in diagonally opposite quadrants, that is, the terminal posts 5 of the same switch group are diagonally arranged on the base. As for the terminal posts 5 of adjacent switch groups, the projections on the reference plane P are staggered and distributed in adjacent quadrants, and the plurality of switch groups are arranged along the axial direction of the rotating member. In this way, the terminal posts 5 of adjacent switch groups can be arranged staggered on the side surface of the base 1, the distance between the terminal posts 5 of different groups can be increased, the electrical connection between the terminal posts of different groups can be prevented, and the reliability of the multi-pole disconnector can be improved.

[0051] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, those skilled in the art should understand that the remaining parts not described are prior art, and various changes made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, all fall within the protection scope of the utility model.

Claims

1. A rotary disconnector, characterized in that: The base comprises a side wall part enclosing a closed frame structure, two static contacts, a rotating part and two dynamic contacts arranged at the two ends of the rotating part in the radial direction, the two dynamic contacts rotate under the drive of the rotating part to realize the opening and closing cooperation of the two dynamic contacts and the two static contacts, the plane perpendicular to the rotating shaft of the rotating part is defined as the reference plane, the projection of the side wall part on the reference plane is the base outer frame, a two-dimensional rectangular coordinate system is constructed on the reference plane, the origin of the two-dimensional rectangular coordinate system is the projection of the rotating shaft of the rotating part on the reference plane, and the two static contacts are respectively located in two opposite quadrants in the base outer frame.

2. A rotary disconnector according to claim 1, characterized in that: The side wall part is a rectangular frame structure, and the two coordinate axes of the two-dimensional rectangular coordinate system are respectively parallel to one side of the rectangular frame, and the four corners of the rectangular frame are correspondingly distributed in the four quadrants.

3. A rotary disconnector according to claim 2, characterized in that: The static contact is conductively connected to a terminal, and the terminal is arranged on the side wall part, and the projections of the two terminals on the reference plane are located in two non-adjacent quadrants, so that the two terminals are diagonally arranged in the rectangular frame.

4. A rotary disconnector according to claim 3, characterized in that: The projections of the conductively connected static contact and the terminal on the reference plane are located in the same quadrant.

5. A rotary disconnector according to claim 1, characterized in that: The static contact is connected to a terminal through a conductor, the terminal is arranged on the side wall part, the base comprises a bottom plate part connected to the side wall part, the conductor is embedded in the bottom plate part, the static contact is arranged on the bottom plate part and exposed to the bottom plate part.

6. A rotary disconnector according to claim 5, characterized in that: The static contact, the conductor and the terminal are an integral conductive body.

7. A rotary disconnector according to claim 5, characterized in that: The bottom plate part is provided with a contact support, the contact support is a semi-enclosed structure, and the static contact is arranged inside the contact support of the semi-enclosed structure.

8. A rotary disconnector according to claim 1, characterized in that: The base comprises a bottom plate part connected to the side wall part, the static contact is mounted on the bottom plate part, the bottom plate part is movably mounted with an insulating arc separation cover, in the state that the static contact and the dynamic contact are disconnected, the arc separation cover cooperates with the bottom plate part to form an arc separation structure for surrounding the static contact, the arc separation cover is provided with a clearance opening, and the clearance opening is used for accommodating the static contact to surround the static contact in the arc separation cover during the movement of the arc separation cover.

9. A multi-pole disconnector, characterized by: The base comprises a plurality of groups of switches, two dynamic contacts and two static contacts form a group of the switches, any group of the switches forms the switch cooperation of any one of claims 1-8, and any group of the switches is connected to a conductive loop for controlling the switch of the conductive loop.

10. A multi-pole disconnector according to claim 9, characterized in that: Each static contact is conductively connected to a terminal, the terminal is exposed to the base, a plurality of groups of the switches are arranged at intervals along the axial direction of the rotating part, the projections of the terminals of the same group of switches on the reference plane are respectively located in opposite quadrants, and the projections of the terminals of adjacent groups of switches on the reference plane are distributed in adjacent quadrants.

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