Electrical switch

Abstract

The embodiment of the utility model provides an electrical switch, and the electrical switch comprises a static contact assembly which comprises a static contact; the moving contact assembly is suitable for being switched between a switching-on position and a switching-off position relative to the static contact assembly and comprises a moving contact; the arc extinguishing chamber comprises a first group of arc extinguishing grid sheets and a second group of arc extinguishing grid sheets, the first group of arc extinguishing grid sheets are closer to the static contact than the second group of arc extinguishing grid sheets, the adjacent arc extinguishing grid sheets in the first group of arc extinguishing grid sheets are spaced apart from each other, and the adjacent arc extinguishing grid sheets in the second group of arc extinguishing grid sheets are spaced apart from each other; and a pair of arc striking sheets, a first arc striking sheet of the pair of arc striking sheets is adjacent to the static contact, and a second arc striking sheet of the pair of arc striking sheets is adjacent to the moving contact when the moving contact assembly is in the opening position. Wherein the first group of arc extinguishing grid sheets and the second group of arc extinguishing grid sheets are arranged between the paired arc striking sheets.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to the technical field of electrical equipment, and more particularly, to an electrical switch. BACKGROUND

[0002] As a kind of protection switch, electrical switch needs to carry and break corresponding current. The movable contact assembly of electrical switch can move and switch between on position and breaking position. In the case that movable contact assembly is in on position, movable contact assembly can be on with static contact assembly. In the case that movable contact assembly is in breaking position, movable contact assembly can be opened to maximum position and disconnected with static contact assembly. At the moment when movable contact assembly is disconnected with static contact assembly, electric arc will be generated between movable contact assembly and static contact assembly. SUMMARY

[0003] In one aspect of the present disclosure, an electrical switch is provided, comprising: a static contact assembly comprising a static contact point; a movable contact assembly adapted to switch relative to the static contact assembly between a closed position and an open position, and comprising a movable contact point; an arc chamber comprising a first set of arc runner vanes and a second set of arc runner vanes, the first set of arc runner vanes being closer to the static contact point than the second set of arc runner vanes, adjacent arc runner vanes in the first set of arc runner vanes being spaced apart from each other, and adjacent arc runner vanes in the second set of arc runner vanes being spaced apart from each other; and a pair of arc striking vanes, a first arc striking vane in the pair of arc striking vanes being adjacent to the static contact point, and a second arc striking vane in the pair of arc striking vanes being adjacent to the movable contact point in the case that the movable contact assembly is in the open position, wherein the first set of arc runner vanes and the second set of arc runner vanes are disposed between the pair of arc striking vanes.

[0004] According to embodiments of the present disclosure, in the case that electric arc is generated when movable contact point and static contact point are disconnected, the first set of arc runner vanes can cut long electric arc into short electric arc, and then the second set of arc runner vanes can further cut short electric arc. In addition, the second set of arc runner vanes can increase the movement path of electric arc due to being distributed on the outside. In this way, electric arc can be cut and cooled to increase arc voltage and improve arc extinguishing capability. Therefore, the electrical switch according to embodiments of the present disclosure improves arc extinguishing performance without increasing the space of arc chamber, and ensures reliable disconnection of the electrical switch.

[0005] In some embodiments, adjacent arc runner vanes in the first set of arc runner vanes are disposed at an angle.

[0006] In some embodiments, each arc runner of the first set of arc runners comprises a first portion and a second portion, the first portion is closer to the stationary contact than the corresponding second portion, and a spacing between the first portions of adjacent arc runners of the first set of arc runners is less than a spacing between the second portions of the adjacent arc runners.

[0007] In some embodiments, the spacing between the first portions of adjacent arc runners of the first set of arc runners is equal, and the spacing between the second portions of adjacent arc runners of the first set of arc runners is equal.

[0008] In some embodiments, adjacent arc runners of the second set of arc runners are disposed at an angle.

[0009] In some embodiments, each arc runner of the second set of arc runners comprises a third portion and a fourth portion, the third portion is closer to the first set of arc runners than the corresponding fourth portion and is spaced apart from the second portions of the first set of arc runners, and a spacing between the third portions of adjacent arc runners of the second set of arc runners is less than a spacing between the fourth portions of the adjacent arc runners.

[0010] In some embodiments, the spacing between the third portions of adjacent arc runners of the second set of arc runners is varied, and the spacing between the fourth portions of adjacent arc runners of the second set of arc runners is varied.

[0011] In some embodiments, a thickness of each arc runner of the first set of arc runners is greater than a thickness of each arc runner of the second set of arc runners.

[0012] In some embodiments, the arc runner chamber further comprises a pair of insulating side plates, the first set of arc runners and the second set of arc runners are disposed between the pair of insulating side plates, respectively.

[0013] In some embodiments, the stationary contact assembly comprises a support, the support comprises a mounting section, a bent section, and a wiring section spaced apart from the mounting section, the stationary contact is disposed on the mounting section, wherein the first arc initiation plate is disposed on a side of the mounting section facing away from the wiring section, and the second arc initiation plate is disposed between the pair of insulating side plates.

[0014] It should be understood that nothing in this section is intended to limit the key or important features of the embodiments of the present disclosure, nor is it meant to limit the scope of the present disclosure. Other features of the present disclosure will be better appreciated from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by describing in detail some embodiments thereof with reference to the attached drawings in which:

[0016] Figure 1 A partial structural schematic diagram of an electrical switch is shown according to some embodiments of the present disclosure;

[0017] Figure 2 A partial structural schematic diagram of an electrical switch is shown according to some embodiments of the present disclosure; Figure 1 A partial structural schematic diagram of an electrical switch is shown according to some embodiments of the present disclosure;

[0018] Figure 3 A partial structural schematic diagram of an electrical switch is shown according to some embodiments of the present disclosure;

[0019] Figure 4 A partial structural schematic diagram of an electrical switch is shown according to some embodiments of the present disclosure;

[0020] Figure 5 A partial structural schematic diagram of an electrical switch is shown according to some embodiments of the present disclosure.

[0021] Legend of reference signs:

[0022] 100 is an electrical switch, 101 is a housing chamber, and 102 is a mounting space;

[0023] 1 is a stationary contact assembly, 11 is a stationary contact point, 12 is a support member, 121 is a mounting section, 122 is a bent section, and 123 is a wiring section;

[0024] 2 is a movable contact assembly, and 21 is a movable contact point;

[0025] 3 is an arc extinguishing chamber, 31 is a first set of arc extinguishing grid fins, 311 is a first portion, 312 is a second portion, 32 is a second set of arc extinguishing grid fins, 321 is a third portion, 322 is a fourth portion, and 33 is an insulating side plate;

[0026] 4 is a pair of arc striking fins, 41 is a first arc striking fin, and 42 is a second arc striking fin;

[0027] 5 is a gas generating member, and 51 is an isolation portion;

[0028] 6 is a magnetic conducting member, 61 is a connecting portion, and 62 is an extending portion. DETAILED DESCRIPTION

[0029] Preferred embodiments of the present disclosure will be described in greater detail below, with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0030] The term "comprising" and variations thereof as used herein are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "or" as used herein is intended to mean an inclusive "or" unless otherwise indicated, such as in the context of "either or." The term "some examples" and "some embodiments" as used herein are intended to mean at least some examples or embodiments. The term "other embodiments" as used herein is intended to mean at least one other example or embodiment. The terms "first," "second," and the like as used herein are not intended to denote a particular order, but are intended to denote a particular object.

[0031] As described above, an arc is generated between the moving contact assembly and the stationary contact assembly at the moment when the moving contact assembly is separated from the stationary contact assembly. Conventional electrical switches employ an arc chamber assembly to guide the arc movement and split, cool the arc by means of metal sheets, so as to quickly extinguish the arc. The design parameters of the shape, arrangement, material selection, etc. of the metal sheets directly affect the arc energy dissipation efficiency and the breaking reliability. In addition to the design parameters of the shape and arrangement of the metal sheets, the more the number of the metal sheets, the greater the heat capacity, which is conducive to extinguishing the arc, but this usually increases the size of the arc extinguishing device. In addition, for electrical switches used for direct current, since the direct current has no zero-crossing point, it increases the difficulty of arc extinguishing, which requires an arc extinguishing device with better arc extinguishing performance.

[0032] Based on this, embodiments of the present disclosure provide an electrical switch aiming to improve the arc extinguishing performance without increasing the space occupied by the arc extinguishing device. In the following, the electrical switch will be described in detail in combination with Figures 1 to 5 The principles of the present disclosure will be described.

[0033] Figure 1 A partial structural schematic diagram of the electrical switch 100 according to some embodiments of the present disclosure is shown. Figure 2 A partial structural schematic diagram of the electrical switch 100 is shown Figure 1 A partial structural schematic diagram of the electrical switch 100 is shown along another view, in which the arc chamber 3, the gas generating member 5, and the second arc guiding sheet 42 are not shown. Figure 3 A structural schematic diagram of the stationary contact assembly 1, the arc chamber 3, the magnetic conducting member 6, the second arc guiding sheet 42, and the gas generating member 5 according to some embodiments of the present disclosure is shown. As shown in the figure, the stationary contact assembly 1 is arranged in the arc chamber 3, and the magnetic conducting member 6 is arranged in the arc chamber 3. Figures 1 to 3As shown, the electrical switch 100 described herein generally includes a stationary contact assembly 1, a moving contact assembly 2, an arc-extinguishing chamber 3, a pair of arc-inducing plates 4, a pair of gas-generating elements 5, and a magnetic conductor 6. The arc-extinguishing chamber 3, the stationary contact assembly 1, the moving contact assembly 2, and the pair of gas-generating elements 5 share a common enclosing cavity 101.

[0034] Continue to refer to Figure 2 In some embodiments, the moving contact assembly 2 is movable relative to the stationary contact assembly 1 to switch between a closed position and an open position. The moving contact assembly 2 includes a moving contact 21, and correspondingly, the stationary contact assembly 1 includes a stationary contact 11. It is understood that when the moving contact assembly 2 is in the closed position, the moving contact 21 can be connected to the stationary contact 11. And when the moving contact assembly 2 is in the open position, the moving contact 21 can be disconnected from the stationary contact 11 and is at the maximum opening distance from the stationary contact 11.

[0035] refer to Figures 1 to 3 In some embodiments, the stationary contact assembly 1 may further include a support member 12. The stationary contact 11 may be disposed on the support member 12, and the support member 12 may surround the mounting space 102. A portion of the magnetic conductor 6 may be located within the mounting space 102. Further, the magnetic conductor 6 may include a connecting portion 61 and a pair of extensions 62. The connecting portion 61 may be disposed within the mounting space 102, and the pair of extensions 62 are connected to the connecting portion 61 and spaced apart from each other.

[0036] Continue to refer to Figure 2 and Figure 3 The support member 12 may include a mounting section 121, a bent section 122, and a wiring section 123 spaced apart from the mounting section 121. The mounting section 121, the bent section 122, and the wiring section 123 together surround the mounting space 102. The stationary contact 11 may be located on the side of the mounting section 121 opposite to the wiring section 123. A pair of extensions 62 may be located on the side of the connecting portion 61 opposite to the wiring section 123, and a portion of the mounting section 121 and the stationary contact 11 may be located between the pair of extensions 62. In this way, the arc located in the first chamber and at the stationary contact 11 can be guided by the pair of extensions 62 and move toward the arc-extinguishing chamber 3.

[0037] Figure 4 A cross-sectional view of an electrical switch 100 according to some embodiments of the present disclosure is shown. For example... Figure 3 and Figure 4 As shown, the arc-extinguishing chamber 3 includes a first set of arc-extinguishing grid plates 31 and a second set of arc-extinguishing grid plates 32. The first set of arc-extinguishing grid plates 31 is closer to the stationary contact 11 than the second set of arc-extinguishing grid plates 32. Adjacent arc-extinguishing grid plates in the first set of arc-extinguishing grid plates 31 are spaced apart from each other, and adjacent arc-extinguishing grid plates in the second set of arc-extinguishing grid plates 32 are also spaced apart from each other.

[0038] refer toFigure 3 and Figure 4 Further, the first arc leading piece 41 is adjacent to the static contact 11, and the second arc leading piece 42 is adjacent to the moving contact 21 when the moving contact assembly 2 is in the open position. The first group of arc extinguishing vanes 31 and the second group of arc extinguishing vanes 32 can be arranged between the pair of arc leading pieces 4. That is, the first group of arc extinguishing vanes 31 and the second group of arc extinguishing vanes 32 extend from the static contact 11 to the maximum open distance of the static contact 11.

[0039] Referring to Figure 3 and Figure 4 Further, one of the arc extinguishing vanes in the outer side of the first group of arc extinguishing vanes 31 and one of the arc extinguishing vanes in the outer side of the second group of arc extinguishing vanes 32 are adjacent to the first arc leading piece 41, and the other of the arc extinguishing vanes in the outer side of the first group of arc extinguishing vanes 31 and the other of the arc extinguishing vanes in the outer side of the second group of arc extinguishing vanes 32 are adjacent to the second arc leading piece 42. That is, the first group of arc extinguishing vanes 31 and the second group of arc extinguishing vanes 32 extend from the first arc leading piece 41 to the second arc leading piece 42. In this way, when the arc is guided to the arc extinguishing chamber 3, the static contact assembly 1, the first arc leading piece 41, the first group of arc extinguishing vanes 31, the second group of arc extinguishing vanes 32, the second arc leading piece 42 and the moving contact assembly 2 can form a path, thereby achieving arc extinguishing.

[0040] According to the embodiments of the present disclosure, when the arc is generated by the breaking of the moving contact 21 and the static contact 11, the first group of arc extinguishing vanes 31 can cut the long arc into short arcs, and then the second group of arc extinguishing vanes 32 can further cut the short arcs. In addition, the second group of arc extinguishing vanes 32 can increase the movement path of the arc due to the distribution on the outer side. In this way, the arc can be cut and cooled to increase the arc voltage and improve the arc extinguishing capability. Therefore, the electrical switch 100 according to the embodiments of the present disclosure improves the arc extinguishing performance without increasing the space of the arc extinguishing chamber, thereby ensuring the reliable breaking of the electrical switch 100. In addition, the electrical switch 100 according to the embodiments of the present disclosure has small size and good arc extinguishing performance, so that the product is better used in high-voltage direct-current occasions.

[0041] Referring to Figure 3 and Figure 4 In some embodiments, along the arrangement direction X of the first group of arc extinguishing vanes 31, the first group of arc extinguishing vanes 31 and the second group of arc extinguishing vanes 32 can be arranged between the pair of arc leading pieces 4. It should be noted that the arrangement direction X of the first group of arc extinguishing vanes 31 can be the same as or different from the arrangement direction of the second group of arc extinguishing vanes 32, and the embodiments of the present disclosure do not limit this.

[0042] Referring to Figure 3 and Figure 4In some embodiments, the arc-extinguishing chamber 3 can further include a pair of insulating side plates 33. The first group of arc-extinguishing vanes 31 and the second group of arc-extinguishing vanes 32 are respectively arranged between the pair of insulating side plates 33. The arc-extinguishing vanes according to the embodiments of the present disclosure can be assembled between the pair of insulating side plates 33 in any manner, such as by clamping or the like, and the embodiments of the present disclosure do not limit the same.

[0043] In some embodiments, referring back to Figure 2 , the first arc-igniting vane 41 can be arranged on the side of the mounting section 121 facing away from the wiring section 123. Referring back to Figure 3 , the second arc-igniting vane 42 can be arranged between the pair of insulating side plates 33. In this way, in the case that the arc is guided to the arc-extinguishing chamber 3, the stationary contact 11, the first arc-igniting vane 41, the first group of arc-extinguishing vanes 31, the second group of arc-extinguishing vanes 32, the second arc-igniting vane 42, and the movable contact 21 can constitute a passage, thereby achieving arc-extinguishing.

[0044] Referring back to Figure 1 and Figure 3 In some embodiments, the pair of gas-generating members 5 can each be arranged on the corresponding insulating side plate 33. The manner in which the gas-generating member 5 is connected to the insulating side plate 33 is not limited herein. Further, one side of the pair of gas-generating members 5 is connected to the corresponding insulating side plate 33, and the other side of the pair of gas-generating members 5 is adjacent to the movable contact assembly 2 and the stationary contact 11. It can be understood that, due to the high temperature of the arc, the pair of gas-generating members 5 can release gas at high temperature, so that the pressure in the containing chamber 101 adjacent to the movable contact assembly 2 is greater than the pressure in the containing chamber 101 adjacent to the arc-extinguishing chamber 3, thereby assisting the movement of the arc toward the arc-extinguishing chamber 3 through the pressure difference.

[0045] The gas-generating member 5 according to the embodiments of the present disclosure can include various types of materials currently known or available in the future, and the embodiments of the present disclosure do not limit the same as long as it can release gas in a high-temperature environment. For example, in some embodiments, the gas-generating member 5 can be a nylon member. In addition, referring back to Figure 3 , the gas-generating member 5 further has an insulating portion 51 wrapping the extension portion 62, so as to avoid the extension portion 62 being conducted by the stationary contact 11.

[0046] Figure 5 A structural schematic diagram of the first group of arc-extinguishing vanes 31, the second group of arc-extinguishing vanes 32, and the pair of arc-igniting vanes 4 according to some embodiments of the present disclosure is shown. As Figure 4 and Figure 5As shown, in some implementations, the thickness of each arc-extinguishing grid in the first group 31 is greater than the thickness of each arc-extinguishing grid in the second group 32. It can be understood that the first group of arc-extinguishing grids 31 can cut long arcs into short arcs. Because long arcs have higher energy, each arc-extinguishing grid in the first group 31 needs to be thickened to bear the energy of the long arc. The second group of arc-extinguishing grids 32 can further cut short arcs into even shorter arcs; therefore, each arc-extinguishing grid in the second group 32 needs to be thinned to better cut short arcs.

[0047] In this way, since the second group of arc-extinguishing grid plates 32 are distributed on the outside, and the thickness of each arc-extinguishing grid plate in the first group of arc-extinguishing grid plates 31 is greater than the thickness of each arc-extinguishing grid plate in the second group of arc-extinguishing grid plates 32, when the spacing between adjacent arc-extinguishing grid plates in the first group of arc-extinguishing grid plates 31 is equal to or slightly different from the spacing between adjacent arc-extinguishing grid plates in the second group of arc-extinguishing grid plates 32, the number of arc-extinguishing grid plates in the second group of arc-extinguishing grid plates 32 is greater than the number of arc-extinguishing grid plates in the first group of arc-extinguishing grid plates 31, thereby facilitating further cutting of the short arc.

[0048] refer to Figure 4 and Figure 5 In some embodiments, adjacent arc-extinguishing grids in the first set of arc-extinguishing grids 31 may be arranged at an angle. Each arc-extinguishing grid in the first set of arc-extinguishing grids 31 may include a first portion 311 and a second portion 312. The first portion 311 is closer to the stationary contact 11 than the corresponding second portion 312, and the spacing between the first portions 311 of adjacent arc-extinguishing grids in the first set of arc-extinguishing grids 31 is smaller than the spacing between the second portions 312 of adjacent arc-extinguishing grids. That is, the arc-extinguishing grids in the first set of arc-extinguishing grids 31 are radial. In this way, the pressure at the moving contact assembly 2 is greater than the pressure at the arc-extinguishing chamber 3, thereby assisting the arc to move toward the arc-extinguishing chamber 3 through the pressure difference. In addition, the first set of arc-extinguishing grids 31 can cut a long arc into a short arc.

[0049] refer to Figure 4 and Figure 5 In some embodiments, the spacing between the first portions 311 of adjacent arc-extinguishing grids in the first group of arc-extinguishing grids 31 can be equal, and the spacing between the second portions 312 of adjacent arc-extinguishing grids in the first group of arc-extinguishing grids 31 can be equal. That is, the arc-extinguishing grids in the first group of arc-extinguishing grids 31 can extend to the same point. In this way, the pressure at the moving contact assembly 2 is greater than the pressure at the arc-extinguishing chamber 3, thereby assisting the arc to move towards the arc-extinguishing chamber 3 through the pressure difference. In addition, the first group of arc-extinguishing grids 31 can cut a long arc into a short arc.

[0050] It should be noted that in other embodiments, the spacing between the first portions 311 of adjacent vanes in the first group of vanes 31 can also vary, and the spacing between the second portions 312 of adjacent vanes in the first group of vanes 31 can also vary.

[0051] With continued reference to Figure 4 and Figure 5 In some embodiments, adjacent vanes in the second group of vanes 32 can be arranged at an angle. Each vane in the second group of vanes 32 can include a third portion 321 and a fourth portion 322. The third portion 321 is closer to the first group of vanes 31 than the corresponding fourth portion 322, and is spaced apart from the second portions 312 of the first group of vanes 31. The spacing between the third portions 321 of adjacent vanes in the second group of vanes 32 is less than the spacing between the fourth portions 322 of adjacent vanes. That is, the vanes in the second group of vanes 32 are also radially arranged.

[0052] With reference to Figure 4 and Figure 5 Figure 4 Figure 5 In some embodiments, the spacing between the third portions 321 of adjacent vanes in the second group of vanes 32 can vary, for example, the spacing is similar. The spacing between the fourth portions 322 of adjacent vanes in the second group of vanes 32 can vary, for example, the spacing is similar. That is, the vanes in the second group of vanes 32 can also extend to the same point.

[0053] It should be noted that in other embodiments, the spacing between the third portions 321 of adjacent vanes in the second group of vanes 32 can also be equal, and the spacing between the fourth portions 322 of adjacent vanes in the second group of vanes 32 can also be equal.

[0054] In some embodiments, the spacing between adjacent vanes in the first group of vanes 31 can be equal to the spacing between adjacent vanes in the second group of vanes 32. In other embodiments, the spacing between adjacent vanes in the first group of vanes 31 can also vary from the spacing between adjacent vanes in the second group of vanes 32, but the difference is small. It should be noted that the spacing between adjacent vanes in the first group of vanes 31 and the spacing between adjacent vanes in the second group of vanes 32 should not be set too large or too small, in order to avoid the problem of too close to cause the vanes to overheat and even melt, and the problem of too far to cause poor arc extinguishing effect.

[0055] The arc extinguishing design according to embodiments of the present disclosure can be applied to various electrical switches to at least partially address the above-mentioned problems. It should be appreciated that the arc extinguishing design according to embodiments of the present disclosure can also be applied to other electrical components, for which embodiments of the present disclosure are not limited.

[0056] Embodiments of the present disclosure have been described above, the above description is exemplary only and is not exhaustive or limiting to the disclosed embodiments. Many modifications and variations of the described embodiments are possible in light of the above teachings. The choice of words in this document is intended to convey the best of the inventor's knowledge at the time of the filing of this document. The use of the terms is intended to best explain the principles of the embodiments, practical application, or technical improvement in the art, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An electrical switch (100), characterized in that The electrical switch (100) comprises: a stationary contact assembly (1) comprising a stationary contact point (11); a movable contact assembly (2) adapted to be switched relative to the stationary contact assembly (1) between a closed position and an open position and comprising a movable contact point (21); an arc chamber (3) comprising a first set of arc runner vanes (31) and a second set of arc runner vanes (32), the first set of arc runner vanes (31) being closer to the stationary contact point (11) than the second set of arc runner vanes (32), adjacent arc runner vanes of the first set of arc runner vanes (31) being spaced apart from each other, and adjacent arc runner vanes of the second set of arc runner vanes (32) being spaced apart from each other; and a pair of pilot vanes (4), a first pilot vane (41) of the pair of pilot vanes (4) being adjacent to the stationary contact point (11), and a second pilot vane (42) of the pair of pilot vanes (4) being adjacent to the movable contact point (21) in case the movable contact assembly (2) is in the open position, wherein the first set of arc runner vanes (31) and the second set of arc runner vanes (32) are arranged between the pair of pilot vanes (4).

2. The electrical switch (100) according to claim 1, characterized in that Adjacent arc runner vanes of the first set of arc runner vanes (31) are arranged at an angle.

3. The electrical switch (100) according to claim 2, characterized in that Each arc runner vane of the first set of arc runner vanes (31) comprises a first portion (311) and a second portion (312), the first portion (311) being closer to the stationary contact point (11) than the respective second portion (312), and a spacing between the first portions (311) of adjacent arc runner vanes of the first set of arc runner vanes (31) is smaller than a spacing between the second portions (312) of adjacent arc runner vanes.

4. The electrical switch (100) according to claim 3, characterized in that The spacing between the first portions (311) of adjacent arc runner vanes of the first set of arc runner vanes (31) is equal, and the spacing between the second portions (312) of adjacent arc runner vanes of the first set of arc runner vanes (31) is equal.

5. The electrical switch (100) according to claim 3, characterized in that Adjacent arc runner vanes of the second set of arc runner vanes (32) are arranged at an angle.

6. The electrical switch (100) according to claim 5, characterized in that Each arc runner vane of the second set of arc runner vanes (32) comprises a third portion (321) and a fourth portion (322), the third portion (321) being closer to the first set of arc runner vanes (31) than the respective fourth portion (322) and being spaced apart from the second portions (312) of the first set of arc runner vanes (31), and a spacing between the third portions (321) of adjacent arc runner vanes of the second set of arc runner vanes (32) is smaller than a spacing between the fourth portions (322) of adjacent arc runner vanes.

7. The electrical switch (100) according to claim 6, characterized in that The spacing between the third portions (321) of adjacent arc runner vanes of the second set of arc runner vanes (32) is varying, and the spacing between the fourth portions (322) of adjacent arc runner vanes of the second set of arc runner vanes (32) is varying.

8. The electrical switch (100) according to any one of claims 1 to 7, characterized in that A thickness of each arc runner vane of the first set of arc runner vanes (31) is greater than a thickness of each arc runner vane of the second set of arc runner vanes (32).

9. The electrical switch (100) according to any one of claims 1 to 7, characterized in that The arc extinguishing chamber (3) further comprises a pair of insulating side plates (33), the first group of arc extinguishing fins (31) and the second group of arc extinguishing fins (32) are arranged between the pair of insulating side plates (33) respectively.

10. The electrical switch (100) according to claim 9, characterized in that The stationary contact assembly (1) comprises a support (12), the support (12) comprises a mounting section (121), a bending section (122) and a wiring section (123) spaced apart from the mounting section (121), the stationary contact (11) is arranged on the mounting section (121), Wherein the first arc striking fin (41) is arranged on the side of the mounting section (121) away from the wiring section (123), and the second arc striking fin (42) is arranged between the pair of insulating side plates (33).

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