electrical switch

Abstract

The application discloses an electric switch. The electric switch comprises an insulating shell, an operating mechanism, an arc extinguishing chamber, a rotating shaft system, a static contact, a moving contact, an incoming line end and an outgoing line end. The static contact is arranged above the incoming line end or the outgoing line end. The static contact is connected with a connecting plate of a static contact point and the bottom of the insulating shell forms an acute angle. The static contact is further connected with a coil winding. The coil winding and the static contact are arranged on two sides of the connecting plate. The electric switch has good isolation and insulation performance, strong self-excitation field and arc striking effect, can greatly improve the breaking capacity of the electric switch, and can easily realize zero flying arc of the electric switch.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to an electrical switch. Background Technology

[0002] like Figure 1 As shown, in existing molded case switches, the operating mechanism, shaft, contact system, and arc-extinguishing system are all housed within the base, forming a single cavity. Because the operating mechanism needs to drive the shaft and contact system, these components cannot form a relatively enclosed space. When the switch interrupts a fault, it generates high-temperature, high-pressure charged arc gas and metal particles. Under the influence of the pressure difference, the arc and metal particles spread in all directions. If the arc gas is ejected later, it will burn the contact spring and main tension spring, causing spring failure. If the metal particles are splashed onto the mechanism or shaft, it will cause the mechanism or shaft to jam or even become stuck. All of these factors can easily lead to interruption failure. Furthermore, traditional switch stationary contacts are flat or U-shaped structures. When the short-circuit current is small, the magnetic field generated by the short-circuit current is small, making it difficult for the arc to move towards the arc-extinguishing grid, resulting in excessively long arcing time and contact burn-out.

[0003] With the development of photovoltaic technology, the rated operating voltage of molded case switches currently required has increased to AC1000V (alternating current) and DC1500V (direct current). Simultaneously, the arc distance is required to be as short as possible, or even zero, to ensure the switch's safety and reliability during use and to prevent secondary arcing faults to the enclosure or cabinet. Currently, conventional switches have the arc nozzle located above the switch's inlet terminal. When the switch interrupts a fault current, an arc is generated between the moving and stationary contacts, ionizing the surrounding air to form a high-temperature, high-pressure, conductive free gas. The residual gas, after cooling and being cut within the arc-extinguishing chamber, is ejected from the switch through the arc nozzle. In existing switches, one end of the stationary contact is electrically connected to the inlet terminal's wiring screw, which is positioned directly opposite the arc nozzle. When a fault occurs in the circuit and the fault current is interrupted, the electric arc will travel along the arc-extinguishing chamber to the wiring screw at the incoming end, causing a direct short circuit between the wiring screw and the moving contact, resulting in interruption failure. Due to the high voltage, the arc gas is directly ejected from the switch. In this case, the arc distance will be very long, and the arc will cause busbar to ground, busbar phase-to-phase breakdown, and short circuit. This will cause secondary arc faults inside the enclosure or cabinet, ultimately resulting in a serious quality accident of the switch, enclosure, or cabinet burning out.

[0004] like Figure 2 , 3As shown in CN108695124A, an optimized switch layout structure is disclosed, including an arc-extinguishing chamber, a stationary contact, a mechanism, a trip unit, and a rotating shaft. Its characteristic is that it further includes a left cover, a right cover, and the left and right covers are interconnected in the left and right directions to form an integral structure. The trip unit and mechanism are located outside the integral structure, while the arc-extinguishing chamber, stationary contact, moving contact, and rotating shaft are located inside the integral structure. This invention enables the switch to have good isolation performance and excellent phase-to-phase and in-line / out-of-line insulation capabilities, while also solving the problem of particle backflush. However, this structure is formed by modular splicing of the left and right covers. Products with two or more poles require two or more modules to be nested and spliced. The accumulated tolerances caused by splicing can lead to asynchronous connection and disconnection of contacts of different poles. This situation, especially in DC applications, can lead to disconnection failure and insufficient electrical life due to asynchrony. Furthermore, the arc is directly ejected from the switch through the arc nozzle, bypassing the internal arc channel for deionization, resulting in a very long arc distance, seriously affecting the safe use of the switch. Furthermore, the modular splicing solution requires increasing the number of shells and riveting processes, which significantly increases material and manufacturing costs, making it uneconomical. Summary of the Invention

[0005] The purpose of this invention is to provide an electrical switch that, while ensuring the synchronization performance of the electrical switch, enables the relative independence and enclosure of the functional modules within the electrical switch, exhibiting good isolation and insulation performance. Simultaneously, it reduces burn-out of static contacts and improves breaking capacity, thus solving problems such as busbar-to-ground and busbar-to-phase breakdown and short circuits caused by arcing during the use of the electrical switch.

[0006] To achieve the above-mentioned objective, the present invention provides an electrical switch, comprising at least an insulating shell, an operating mechanism, an arc-extinguishing chamber, a rotating shaft system, a stationary contact, a moving contact, an inlet end, and an outlet end. The stationary contact is disposed above the inlet end or the outlet end. The connecting plate connecting the stationary contact to the stationary contact point forms an acute angle with the bottom of the insulating shell. The stationary contact is also connected to a coil winding. The coil winding and the stationary contact point are respectively disposed on both sides of the connecting plate.

[0007] As a further improvement of the present invention, the direction of the current flowing through the connecting plate of the stationary contact is opposite to or the same as the direction of the current flowing through the moving contact.

[0008] As a further improvement of the present invention, the stationary contact also includes a stationary contact point, a straight body, a coil winding, and a terminal block, wherein the coil winding is spirally wound around the outside of the circumference of the straight body.

[0009] As a further improvement of the present invention, the through-body is made of magnetically conductive materials such as iron or silicon steel sheets.

[0010] As a further improvement of the present invention, the arc-extinguishing chamber is disposed near the bottom surface of the base of the insulating shell.

[0011] As a further improvement of the present invention, a first arc channel is provided between the arc-extinguishing chamber and the base of the insulating shell.

[0012] As a further improvement of the present invention, at least one second arc channel is provided outside the first arc channel, and the length of the first arc channel is greater than or equal to 1 / 4 of the total length of the electric switch.

[0013] As a further improvement of the present invention, the second arc channel is connected to at least one end of the first arc channel.

[0014] As a further improvement of the present invention, the arc airflow flowing through the second arc channel is in the opposite direction to the arc airflow flowing through the first arc channel.

[0015] As a further improvement of the present invention, the first arc channel is provided with staggered partitions and deionization devices.

[0016] As a further improvement of the present invention, the electrical switch further includes a trip unit disposed adjacent to the operating mechanism.

[0017] As a further improvement of the present invention, a first arc channel is provided below the trip unit.

[0018] As a further improvement of the present invention, the insulating shell includes a base, a middle seat, and a cover, which are stacked in sequence to form a cavity.

[0019] As a further improvement of the present invention, the cavity is provided with at least a first cavity and a second cavity; the first cavity and the second cavity are isolated and insulated from each other, and the first cavity is provided with a groove for the movement of the moving contact.

[0020] As a further improvement of the present invention, the electric switch further includes a handle connected to the operating mechanism. The operating mechanism and the handle are disposed above or in front of the rotating shaft system. The operating mechanism drives the rotating shaft system and the moving contact to move.

[0021] The beneficial effects of this invention are:

[0022] 1. Compared with the modular switch, the electric switch of the present invention uses fewer parts, has a simpler manufacturing process, and lower manufacturing cost; it can enhance the isolation and insulation performance of the electric switch, while ensuring the synchronization of the contacts in the electric switch, and ensuring the reliability of the electric switch's breaking and electrical performance.

[0023] 2. This invention, by setting the stationary contact to have a straight body and a coil winding, controls the coil winding to spirally wound around the circumference of the straight body, and the straight body is made of magnetically conductive materials such as iron and silicon steel sheets; so that when a short circuit current is generated due to a fault in the circuit, the current flowing through the coil winding generates a large magnetic field, which enables the arc when the electrical switch is broken to quickly enter the arc-extinguishing chamber, reducing the burn-out of the stationary contact and improving the current limiting and breaking performance of the electrical switch;

[0024] 3. By setting up an internal arc channel and installing staggered partitions and anti-ionization devices within the arc channel, the present invention can achieve zero arcing; it solves the problems of busbar to ground, busbar phase-to-phase breakdown, and short circuit caused by arcing during the use of electrical switches. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of a low-voltage switch in an existing technical solution.

[0026] Figure 2 This is a schematic diagram of the internal structure of a low-voltage switch in another existing technical solution.

[0027] Figure 3 for Figure 2 The layout diagram of the low-voltage switchgear functional components in the existing technical solution.

[0028] Figure 4 This is a cross-sectional view of the electrical switch of the present invention in the closed state.

[0029] Figure 5 This is a cross-sectional view of the electrical switch of the present invention in the open state.

[0030] Figure 6 This is a schematic diagram of the first cavity and the second cavity formed by the base, middle seat and cover of the present invention.

[0031] Figure 7 This is a schematic diagram of the operating mechanism of the present invention.

[0032] Figure 8 This is a schematic diagram of the connection of the drive shaft system of the operating mechanism of the present invention.

[0033] Figure 9 This is a schematic diagram of the rotating shaft system of the present invention.

[0034] Figure 10 This is a schematic diagram of the structure of the stationary contact in a preferred embodiment of the present invention.

[0035] Figure 11 This is a schematic diagram of the stationary contact in another preferred embodiment of the present invention.

[0036] Figure 12 This is a schematic diagram showing the magnetic field and direction generated by the stationary contact coil winding of the present invention.

[0037] Figure 13 This is a schematic diagram of the insulating shell-base of the present invention.

[0038] Figure 14 This is a three-dimensional structural diagram of the electric switch of the present invention without an insulating outer shell.

[0039] Figure 15 This is a cross-sectional view of the operating mechanism of the present invention in the closed state.

[0040] Figure 16 This is a cross-sectional view of the operating mechanism of the present invention in the open state.

[0041] Figure 17 This is a schematic diagram of the arc channel in a preferred embodiment of the present invention.

[0042] Figure 18 This is a schematic diagram of the arc channel in another preferred embodiment of the present invention. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] like Figure 4 , 5 As shown in Figure 6, the present invention provides an electric switch, which includes at least an insulating housing 1, an operating mechanism 6 disposed within the insulating housing 1, an arc-extinguishing chamber 3, a rotating shaft system 8, a stationary contact 4, a moving contact 5, and an inlet terminal 100 and an outlet terminal 110 disposed at both ends of the insulating housing 1. The electric switch is connected in a circuit to control the opening and closing of the circuit and ensure electrical safety.

[0045] The insulating outer shell 1 includes a base 9, a middle seat 10, and a cover 11, which are stacked sequentially from bottom to top to form a cavity 200 for housing various structural components. In this invention, the cavity 200 includes a first cavity 201 and a second cavity 202 that are staggered vertically. The first cavity 201 and the second cavity 202 are mutually insulated and independently arranged. Furthermore, the operating mechanism 6, the trip unit 7, and the rotating shaft system 8 are arranged in the first cavity 201, and the arc-extinguishing chamber 3, the stationary contact 4, and the moving contact 5 are arranged in the second cavity 202. This arrangement ensures that the structural components respectively arranged in the first cavity 201 and the second cavity 202 are insulated and isolated, further enabling the electrical switch to have good insulation and improving safety in use.

[0046] Combination Figure 5 As shown, a first arc channel 9-2 is provided at the bottom of the base 9. The total length of the first arc channel 9-2 is greater than or equal to 1 / 4 of the total length of the electrical switch. Furthermore, staggered partition walls 9-3 and an anti-ionization device 12 are provided within the first arc channel 9-2. The anti-ionization device 12 is located at the extended end of the first arc channel 9-2 and near the edge of the base 9. This arrangement allows the anti-ionization device 12 to block metal particles from splashing outward, achieving zero arcing and avoiding problems such as busbar to ground, busbar phase-to-phase breakdown, and short circuits caused by arcing.

[0047] like Figure 13 As shown, the middle seat 10 is fastened to the upper part of the base 9 to enclose the base 9, so that the base 9 and the middle seat 10 together form the second cavity 202. Furthermore, a cavity 103 for accommodating the rotating shaft system 8 is provided on the upper part of the side of the middle seat 10 away from the first cavity 201. The cavity 103 is also provided with a relief groove 104 leading to the base 9 to avoid the moving contact 5, so as to prevent the moving contact 5 from bumping / rubbing against the inner wall of the middle seat 10 during the opening and closing process, which would affect the service life of the electrical switch.

[0048] The cover 11 is fastened to the upper part of the middle seat 10 and together with the middle seat 10 forms the first cavity 201. Furthermore, the cover 11 is provided with a through groove (not shown) for accommodating the operating mechanism 6. The electric switch also includes a handle 62 corresponding to the operating mechanism 6. The handle protrudes to the outside of the cover 11 through the through groove, making it convenient for the user to control the operating mechanism 6 through the handle 62, thus facilitating the use of the electric switch of the present invention.

[0049] like Figure 7 , 8 As shown, the operating mechanism 6 is controlled and connected to the handle 62, so as to drive the rotating shaft system 8 to rotate under the control of the handle 62, thereby controlling the movement of the moving contact 5. In an embodiment of the present invention, the operating mechanism 6 and the handle 62 are disposed above or in front of the rotating shaft system 8, so as to facilitate the combined control of the rotating shaft system 8 and the moving contact 5 by the handle 62 and the operating mechanism 6. Further, the operating mechanism 6 includes a lower connecting rod 61 for driving the rotating shaft system 8. In a preferred embodiment of the present invention, the lower connecting rod 61 is hinged to the rotating shaft system 8. When the operating mechanism 6 is controlled by the handle 62 to achieve the closing movement, the closing force is transmitted to the rotating shaft system 8 through the lower connecting rod 61, driving the rotating shaft system 8 to rotate, so that the stationary contact 4 and the moving contact 5 make electrical contact, thereby connecting the circuit of the energized switch.

[0050] Please see Figure 9 and combined Figure 7As shown, the rotating shaft system 8 includes a rotating shaft 81 for connecting the moving contact 5. Cylindrical bosses 811 are formed at both ends of the axially extending rotating shaft 81. The two cylindrical bosses 811 at both ends are connected as a whole by a cylinder 812. A connecting part 813 is provided at the middle position of the outer peripheral wall of the cylinder 812. A lower connecting rod 61 is connected to the connecting part 813 to realize the transmission connection between the operating mechanism 6 and the rotating shaft system 8, controlling the rotation of the rotating shaft system 8. The moving contact 5 includes a drive arm (not labeled) and a moving contact 51 connected to the drive arm. The drive arm is engaged with the cylindrical bosses 811 at both ends of the rotating shaft 81 and can be driven by the rotating shaft system 8. Under the drive of the rotating shaft system 8, the drive arm drives the moving contact 51 connected to it to move, thereby realizing the connection between the moving contact 5 and the stationary contact 4.

[0051] Furthermore, the rotating shaft system 8 is housed within the cavity 103 of the central seat 10. The inner sides of both side walls of the cavity 103 are provided with semi-circular grooves 101 for accommodating two cylindrical protrusions 811. A groove 102 for accommodating cylinders 812 is formed on the partition wall (not labeled) between the two side walls of the cavity 103, allowing the rotating shaft system 8 to rotate within the semi-circular grooves 101 and 102. Simultaneously, this prevents the rotating shaft system 8 from sliding within the cavity 103 during rotation, thus avoiding malfunctions in the electrical switch. Preferably, the rotating shaft system 8 is integrally molded using a thermosetting material. However, in other embodiments of the invention, the rotating shaft system 8 can also be made of other materials or prepared in a separate form. That is, the material and preparation method of the rotating shaft system 8 in this invention can be selected according to actual needs. The rotating shaft system 8 shown in the specification and drawings of this invention is merely exemplary and should not be considered as a limitation.

[0052] The stationary contact 4 is positioned near the inlet end 100 or the outlet end 110. Preferably, the stationary contact 4 is positioned diagonally above the inlet end 100 or the outlet end 110. This can effectively reduce the size of the electrical switch and facilitate its installation and use.

[0053] like Figure 10 , Figure 11As shown, the stationary contact 4 includes an arc-inducing plate 41, a stationary contact 42, a straight body 43, a coil winding 44, a conductor 45, and a connecting plate 46. The conductor 45 has a straight portion for connecting to the straight body 43 and a terminal block 451 for wiring connections. The connecting plate 46 is horizontal and parallel to the straight portion of the conductor, forming an acute angle α between the connecting plate 46 and the bottom surface of the base 9. Furthermore, the arc-inducing plate 41 and the stationary contact 42 are connected to the side of the connecting plate 46 away from the straight part of the conductor. The straight body 43 is connected between the straight part of the conductor 45 and the connecting plate 46 by riveting, welding or other means, so that the combination of the straight part of the conductor, the straight body 43 and the connecting plate 46 is roughly in the shape of "I". The coil winding 44 is spirally wound on the straight body 43. Preferably, the straight body 43 is a cylindrical straight body made of iron, silicon steel sheet or other magnetic materials, and the coil winding 44 is spirally wound on the outer periphery of the straight body 43.

[0054] Please see Figure 10 As shown, in a preferred embodiment of the present invention, one end of the coil winding 44 is connected to the straight portion of the conductor 45 near the terminal 451, and the other end is connected to the connecting plate 46 near the arc-starting plate 41. At this time, current enters the coil winding 44 through the terminal 451 and the straight portion of the conductor, flowing along the coil winding 44 into the connecting plate 46, so that the current in the connecting plate 46 flows from the end near the arc-starting plate 41 to the end away from the arc-starting plate 41. Consequently, the direction of the current flowing through the stationary contact 4 and the connecting plate 46 is consistent with the direction of the current flowing through the moving contact 5. Furthermore, since the through-body 43 is made of a magnetically conductive material, when current flows through the coil winding 44, according to the right-hand rule, the four fingers point in the direction of the current, and the thumb points in the direction of the magnetic field. Therefore, the magnetic field direction of the magnetic field B generated by the coil winding 44 is consistent with the axial direction of the through-body 43 and points in the direction of the connecting plate 46 (e.g., ...). Figure 12 According to Fleming's rule, the arc root is subjected to a magnetic field and rotates around the stationary contact 42, reducing the arc's dwell time on the stationary contact 42. Finally, under the action of the magnetic force and / or air blowing, the arc moves towards the grid plate of the arc extinguishing chamber 3, and is then cut and cooled by the grid plate, eventually extinguishing the arc and preventing the occurrence of arc flash.

[0055] Please see Figure 11As shown, in another embodiment of the present invention, one end of the coil winding 44 is connected to the straight portion of the conductor 45 on the side away from the terminal 451, and the other end is connected to the side of the connecting plate 46 away from the arc-starting plate 41. In this case, current enters the coil winding 44 through the terminal 451 and the straight portion of the conductor, and flows along the coil winding 44 into the connecting plate 46, so that the current in the connecting plate 46 flows from the end away from the arc-starting plate 41 to the arc-starting plate 41, thereby causing the direction of the current flowing through the stationary contact 4 and the connecting plate 46 to be opposite to the direction of the current flowing through the moving contact 5. Similarly, since the through-body 43 is made of a magnetically conductive material, when current flows through the coil winding 44, according to the right-hand rule, the four fingers point in the direction of the current, and the thumb points in the direction of the magnetic field. Therefore, the direction of the magnetic field B generated by the coil winding 44 is consistent with the axial direction of the through-body 43 and points in the direction of the connecting plate 46 (e.g., ...). Figure 12 According to Fleming's rule, the arc root is also affected by the magnetic field at this time, and rotates around the stationary contact 42 in a circular motion, which quickly drives the arc root and reduces the time the arc stays on the stationary contact 42; finally, under the action of magnetic force and / or air blowing, the arc moves towards the grid plate of the arc extinguishing chamber 3, and is then cut and cooled by the grid plate, and finally the arc is extinguished; thus avoiding the generation of flying arc phenomenon.

[0056] It should be noted that the description and drawings of this invention only illustrate the example of a straight body 43 perpendicular to the connecting plate 46, with the coil winding 44 wound around the outer periphery of the straight body 43 to generate a magnetic field B with the magnetic field direction perpendicular to the connecting plate 46. In other embodiments of this invention, the magnetic field direction of the magnetic field B generated by the coil winding 44 can be set at other angles, such as an obtuse or acute angle between the magnetic field direction of the magnetic field B generated by the coil winding 44 and the connecting plate 46, or the magnetic field direction of the magnetic field B generated by the coil winding 44 being parallel to the connecting plate 46. It is only necessary to ensure that the magnetic field direction of the magnetic field B generated by the coil winding 44 is oriented or partially oriented towards the direction of the arc-extinguishing chamber 3, so that the arc can be transferred to the arc-extinguishing chamber 3 under the action of the magnetic force of the magnetic field B.

[0057] Furthermore, the electrical switch also includes a trip unit 7 located adjacent to the operating mechanism 6, and the trip unit 7 is positioned above the first arc channel 9-2, to control the operating mechanism 6 to unlock when a short-circuit fault occurs in the electrical switch. Specifically, when a short-circuit fault occurs in the electrical switch, the trip unit 7 operates under the action of the short-circuit current, driving the operating mechanism 6 to unlock. After the operating mechanism 6 unlocks, it drives the upper connecting rod (unlabeled) of the operating mechanism 6 to move. At this time, the upper connecting rod drives the lower connecting rod 61 to rotate, thereby pulling the rotating shaft system 8 from the closed position to the open position; causing the moving contact 5 and the stationary contact 4 to separate. In fact, when the moving contact 5 and the stationary contact 4 separate, an arc will be generated between the two contacts. At this time, under the action of the magnetic field generated by the coil winding 44, the arc moves towards the grid in the arc extinguishing chamber 3, and is then cut and cooled by the grid, eventually extinguishing the arc.

[0058] Please see Figure 17 As shown, this is an electric switch in a preferred embodiment of the present invention. In fact, when the rated operating voltage of the electric switch is high, such as AC800V or DC1200V and above, the arc energy generated when the moving contact 5 and the stationary contact 4 break under a relatively large fault current is also very large, and the arc distance is very long. At this time, the length of the single first arc channel 9-2 and the setting of the anti-ionization device 12 cannot achieve zero arcing of the electric switch. Therefore, to further ensure the safety of the electric switch, in this embodiment, the length of the first arc channel 9-2 is [not specified]. 2. A second arc channel 9-4 is also provided at the bottom, and the first arc channel 9-2 and the second arc channel 9-4 are connected. Other components and positions remain insulated from each other. The length of the electric switch is fully utilized. With this configuration, when the arc gas is ejected from the outlet end 110 of the electric switch, because the length of the first arc channel 9-2 and the second arc channel 9-4 after connection is relatively long, the arc gas ejected through the first arc channel 9-2 and the second arc channel 9-4 in sequence is no longer charged, thereby achieving zero arcing of the electric switch.

[0059] Please see Figure 18 The diagram shows a schematic of the electrical switch in another preferred embodiment of the present invention. In this embodiment, the operating mechanism 6 is located directly above the rotating shaft system 8, the arc-extinguishing chamber 3 is located below the rotating shaft system 8, and the stationary contact 4 is located on the right side of the operating mechanism 6 and above the right side of the arc-extinguishing chamber 3. Furthermore, the operating mechanism 6 and the rotating shaft system 8 are located in the first cavity 201, and the arc-extinguishing chamber 3 and the stationary contact 4 are located in the second cavity 202. Furthermore, the first cavity 201 is provided with a clearance groove 104 for the rotating movement of the moving contact 5. In addition, the first cavity 201 and the second cavity 202 are mutually insulated and isolated, so that the electrical switch in this embodiment has good insulation and isolation performance.

[0060] In summary, compared with conventional modular switches, the electric switch of the present invention uses fewer components, has a simpler manufacturing process, and lower manufacturing costs. It enhances the isolation and insulation performance of the electric switch while ensuring the synchronicity of the movement of the moving contact 5 and the stationary contact 4, guaranteeing the reliability of the switch's breaking and electrical performance. Furthermore, by configuring the stationary contact 4 to include a straight body 43 and a coil winding 44, with the coil winding 44 spirally wound around the outer circumference of the straight body 43 and made of magnetically conductive materials such as iron or silicon steel sheets, when a short-circuit current occurs due to a fault in the internal circuit of the electric switch, the current flowing through the coil winding 44 generates a large magnetic field. This allows the arc during the break of the electric switch to quickly enter the arc-extinguishing chamber 3, reducing the burn-out of the stationary contact 42 and improving the current-limiting and breaking performance of the electric switch. Furthermore, by providing at least one first arc channel 9-2 within the insulating housing 1 of the electric switch, and by providing staggered partitions 9-3 and an anti-ionization device 12 within the first arc channel 9-2, zero arcing can be achieved. This solves the problems of busbar and grounding breakdown caused by arcing during the use of the electric switch. The multiple arc channels, such as the first arc channel 9-2 and the second arc channel 9-4, increase the overall length of the arc channels provided within the insulating housing 1, thereby enabling the electric switch of the present invention to achieve zero arcing even when applied in a high-voltage environment.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention.

Claims

1. An electrical switch, comprising at least an insulating housing (1), an operating mechanism (6), an arc-extinguishing chamber (3), a rotating shaft system (8), a stationary contact (4), a moving contact (5), an inlet terminal (100), and an outlet terminal (110), characterized in that: The stationary contact (4) is positioned above the inlet end (100) or the outlet end (110). The connecting plate (46) connecting the stationary contact (42) to the stationary contact (4) forms an acute angle (a) with the bottom of the insulating shell (1). The stationary contact (4) is also connected to a coil winding (44). The coil winding (44) and the stationary contact (42) are respectively located on both sides of the connecting plate (46). The straight section (43) is connected between the conductor straight section of the conductor (45) and the connecting plate (46). The conductor straight section, the straight section (43), and the connecting plate (46) are roughly in the shape of an "I".

2. The electrical switch according to claim 1, characterized in that: The direction of the current flowing through the connecting plate (46) of the stationary contact (4) is opposite to or the same as the direction of the current flowing through the moving contact (5).

3. The electrical switch according to claim 1, characterized in that: The stationary contact (4) also includes a through body (43) and a terminal (451), and the coil winding (44) is spirally wound around the outside of the circumference of the through body (43).

4. The electrical switch according to claim 3, characterized in that: The through-body (43) is made of iron, silicon steel sheet or other magnetically conductive material.

5. The electrical switch according to claim 1, characterized in that: The arc-extinguishing chamber (3) is located on the bottom surface of the base (9) of the insulating shell (1).

6. The electrical switch according to claim 1, characterized in that: A first arc channel (9-2) is also provided between the arc-extinguishing chamber (3) and the base (9) of the insulating shell (1).

7. The electrical switch according to claim 6, characterized in that: The length of the first arc channel (9-2) is greater than or equal to 1 / 4 of the total length of the electrical switch.

8. The electrical switch according to claim 6, characterized in that: At least one second arc channel (9-4) is also provided outside the first arc channel (9-2).

9. The electrical switch according to claim 8, characterized in that: The second arc channel (9-4) is connected to at least one end of the first arc channel (9-2).

10. The electrical switch according to claim 9, characterized in that: The arc airflow flowing through the second arc channel (9-4) is in the opposite direction to the arc airflow flowing through the first arc channel (9-2).

11. The electrical switch according to claim 6, characterized in that: The first arc channel (9-2) is provided with staggered partition walls (9-3) and deionization devices (12).

12. The electrical switch according to claim 1, characterized in that: The electrical switch also includes a trip unit (7), which is disposed adjacent to the operating mechanism (6).

13. The electrical switch according to claim 12, characterized in that: A first arc channel (9-2) is provided below the trip unit (7).

14. The electrical switch according to claim 1, characterized in that: The insulating shell (1) includes a base (9), a middle seat (10), and a cover (11), which are stacked in sequence to form a cavity (200).

15. The electrical switch according to claim 14, characterized in that: The cavity (200) is provided with at least a first cavity (201) and a second cavity (202); the first cavity (201) and the second cavity (202) are isolated and insulated from each other, and the first cavity (201) is provided with a groove (104) for the moving contact (5) to move.

16. The electrical switch according to claim 1, characterized in that: The electrical switch also includes a handle connected to the operating mechanism (6). The operating mechanism (6) and the handle are located above or in front of the rotating shaft system (8). The operating mechanism (6) drives the rotating shaft system (8) and the moving contact (5) to move.

Images