disconnector

Abstract

A disconnecting switch includes an operating device and multiple switching units. The operating device includes a housing, an operating mechanism disposed within the housing, and at least two trip units. The at least two trip units include a first trip unit and a second trip unit. The first trip unit is used at least to drive the operating mechanism to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the input terminal of the switching device to which the operating device belongs. The second trip unit is used at least to drive the operating mechanism to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the output terminal of the switching device to which the operating device belongs. The multiple switching units include at least one first switching unit and multiple second switching units. The cross-sectional areas of the first stationary contact, the second stationary contact, and the moving contact of the first switching unit are larger than the cross-sectional areas of the first stationary contact, the second stationary contact, and the moving contact of the second switching units. This application is beneficial for improving fault diagnosis efficiency and reducing fault diagnosis difficulty.

Description

Technical Field

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

[0002] 1. In existing photovoltaic (PV) power generation systems, a distribution cabinet system is often installed between the PV panel circuit network and the load / mains grid. This distribution cabinet system includes a disconnector to connect and disconnect the PV panel circuit network and the load / mains grid. The disconnector typically has a trip unit to trip in the event of a current and / or voltage fault. Generally, a current and / or voltage fault occurring in the PV panel circuit network will cause the disconnector to trip. However, when a current and / or voltage fault may also occur in the distribution cabinet system or the load / mains grid, the product will also trip upon receiving the fault signal. Therefore, once the disconnector trips, a comprehensive inspection of the PV panel circuit network, the distribution cabinet system, and the load / mains grid system is required, which is inefficient and difficult.

[0003] 2. In the existing technology, the current carrying capacity of the switch of the disconnecting switch is poor. When connecting a high current circuit, it is easy to generate high temperature and heat, which can cause safety hazards and affect the service life of the disconnecting switch.

[0004] 3. In the existing technology, when multiple switch units are stacked and operated simultaneously, the consistency of opening and closing of the multiple switch units is poor. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an isolating switch that improves troubleshooting efficiency, increases current carrying capacity, and enhances the opening and closing consistency of multiple switching units.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a disconnecting switch, comprising stacked operating devices and multiple switching units. The operating device includes a housing, an operating mechanism disposed within the housing, and at least two trip units, wherein the at least two trip units include a first trip unit and a second trip unit.

[0008] The first trip unit is at least used to drive the operating mechanism to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the input terminal of the switching device to which the operating device belongs;

[0009] The second trip unit is at least used to drive the operating mechanism to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the output terminal of the switching device to which the operating device belongs;

[0010] The plurality of switching units include at least one first switching unit and a plurality of second switching units, wherein the current carrying capacity of the first switching unit is greater than that of the second switching unit.

[0011] In one possible implementation, the second trip unit is a conditional trip unit, and the reset operation of the conditional trip unit is independent of the re-tripping operation of the operating mechanism; after the operating mechanism is tripped by the conditional trip unit, the operating mechanism is allowed to re-trap only after the external force drives the conditional trip unit to reset from the trip unit action state to the trip unit reset state.

[0012] In one possible implementation, the conditional trip unit includes a trip lever for driving the operating mechanism to trip, the trip lever including a reset button; when the conditional trip unit is in the activated state, one end of the reset button protrudes outside the device housing and the trip lever engages with the re-fastener to limit the re-fastener to remain in the re-fastener tripped position.

[0013] In one possible implementation, of the at least two trip units, one is a conditional trip unit, and the rest are general trip units; the reset operation of the conditional trip unit is independent of the re-trip operation of the operating mechanism; after the operating mechanism is tripped by the conditional trip unit, the conditional trip unit is reset from the trip unit operating state to the trip unit reset state by external force before the operating mechanism is allowed to re-trip; when the operating mechanism re-trips from the operating mechanism tripped state, the general trip units are driven to reset from the trip unit operating state to the trip unit reset state.

[0014] In one possible implementation, the operating mechanism includes a jump fastener, a locking fastener, and a re-fastener that are rotatably disposed respectively, wherein the re-fastener and the locking fastener establish a first limiting engagement so that the locking fastener and the jump fastener maintain a latching engagement;

[0015] The conditional trip unit drives the re-fastener to rotate and release the first limit engagement with the locking fastener, thereby releasing the latching engagement between the locking fastener and the trip fastener, and switching the operating mechanism from the operating mechanism closed state to the operating mechanism released state; when the trip unit is in the trip unit activated state, the conditional trip unit keeps the re-fastener in the re-fastener released position, so that the operating mechanism cannot be fastened again.

[0016] In one possible implementation, the length direction, width direction, and height direction of the operating mechanism are respectively direction d1, direction d2, and direction d3; the operating mechanism includes a bracket, and the jump fastener, locking fastener, and re-fastener are rotatably mounted on the bracket with their rotation axes all parallel to direction d3, and the jump fastener, locking fastener, and re-fastener are arranged sequentially along direction d2;

[0017] The first trip unit and the operating mechanism are arranged side by side along direction d3. The first trip unit and the re-fastening element are arranged sequentially along direction d3. The second trip unit and the operating mechanism are arranged side by side along direction d1. The second trip unit and the re-fastening element are arranged sequentially along direction d1. The first trip unit is located on the same side of the re-fastening element and the second trip unit in direction d3. On the projection of the operating device perpendicular to direction d3, the second trip unit is located on the same side of the operating mechanism and the first trip unit.

[0018] In one possible implementation, the operating mechanism further includes an operating shaft and a rocker arm, both rotatably mounted on a bracket with their rotation axes parallel to direction d3; a linkage structure; a front connecting rod; a rear connecting rod; a main spring; and a drive component with its rotation axis parallel to direction d3 and for transmission connection with the rotating contact assembly of a switching device. The operating shaft is transmissionally connected to the rocker arm via the linkage structure. One end of the jump-lock is rotatably mounted on the bracket via the jump-lock shaft, and the other end is engaged with the locking fastener. Both ends of the front connecting rod are rotatably connected to the middle of the jump-lock and one end of the rear connecting rod via the front connecting shaft and the rear connecting shaft, respectively. The other end of the rear connecting rod is rotatably connected to the drive component. Both ends of the main spring are connected to the rear connecting shaft and the rocker arm, respectively. The rocker arm and the drive component are located at both ends of the operating mechanism in direction d1, and the jump-lock and the locking fastener are located at both ends of the operating mechanism in direction d2.

[0019] In one possible implementation, the switching unit includes a housing and two first stationary contacts, a second stationary contact, and a rotating contact assembly mounted within the housing. Two arc-extinguishing grid groups are disposed on both sides of the rotating contact assembly. The two first stationary contacts and the second stationary contact are spaced apart on both sides of the rotating contact assembly. The first stationary contacts, the second stationary contacts, and the arc-extinguishing grid groups are arranged intersectingly. The first stationary contact and / or the second stationary contact of the first switching unit includes an integrally formed, sequentially connected first contact portion, a first connecting portion, and at least two first wiring portions. The first contact portion cooperates with the moving contact of the rotating contact assembly. The at least two first wiring portions extend outside the housing for electrical connection to the outside.

[0020] In one possible implementation, the first stationary contact and the second stationary contact include two parallel first wiring portions perpendicular to the first connecting portion. One end of the first connecting portion is connected to the first contact portion. The first contact portion includes a first overlapping portion and a first extension portion. The first extension portion is rectangular, and the length of the first extension portion is greater than or equal to the distance between the two first wiring portions. An angle is formed between the first extension portion and the first connecting portion. The angle is recessed towards the first connecting portion to form a limiting groove for limiting engagement with the arc extinguishing grid plate assembly.

[0021] In one possible implementation, the switching unit includes a housing and two first stationary contacts and a second stationary contact and a rotating contact assembly disposed within the housing. The rotating contact assembly includes a support cover, a moving contact, and a support base stacked together. The support bases and support covers of the plurality of second switching units are provided with second through holes. At least one drive shaft passes through the second through holes and is linked with the rotating contact assemblies of the plurality of second switching units. The drive shaft is directly or indirectly connected to an operating mechanism.

[0022] In one possible implementation, a drive shaft is provided in the middle of the second switching unit, and a second through hole is provided on the first and second contacts. The drive shaft passes through the middle of the moving contact and through all the second switching units.

[0023] In one possible implementation, the support base and support cover are provided with two second through holes, and two parallel drive shafts are provided at a midpoint between the plurality of second switch units. The two drive shafts pass through the two second through holes respectively, so that the moving contact is disposed between the two drive shafts.

[0024] In one possible implementation, the switching unit includes a housing and two first stationary contacts and a second stationary contact, and a rotating contact assembly disposed within the housing. The rotating contact assembly includes a support cover, a moving contact, and a support base stacked together, the support base and the support cover clamping the moving contact. The moving contact includes a first contact and a second contact disposed opposite to each other, with clamping gaps at both ends of the first contact and the second contact to accommodate the first and second stationary contacts. The moving contact is connected to or disconnected from the first and second stationary contacts through the clamping gaps. A moving contact receiving groove is provided between the support base and the support cover, and the moving contact is disposed within the moving contact receiving groove. The moving contact also includes at least one elastic element disposed on the opposite side of the first contact and / or the second contact.

[0025] In one possible implementation, the moving contact further includes a contact support and at least one fixed shaft. The contact support has two grooves on opposite sides, and the two grooves are through-type structures along the length of the moving contact. The middle portions of the first contact and the second contact of the moving contact are respectively placed in the two grooves. The at least one fixed shaft passes through the first contact, the second contact, the contact support, and at least one elastic element, so that the first contact, the second contact, the contact support, and the at least one elastic element are fixed as a whole. The moving contact receiving groove is provided with a limiting structure that cooperates with the contact support, and the contact support is disposed in the moving contact receiving groove.

[0026] In one possible implementation, the switching unit includes a housing and two first stationary contacts and a second stationary contact and a rotary contact assembly disposed within the housing. The rotary contact assembly includes a support cover, a moving contact, and a support base stacked together. A thermoplastic column and a thermoplastic hole are disposed between the support base and the support cover, or a thermoplastic column and a thermoplastic groove are disposed between the support base and the support cover. The support base and the support cover are installed and fixed by the thermoplastic column and the thermoplastic hole / or the thermoplastic column and the thermoplastic groove.

[0027] In one possible implementation, the switching unit includes a housing and two first stationary contacts and a second stationary contact and a rotating contact assembly disposed within the housing. The rotating contact assembly includes a support cover, a moving contact, and a support base stacked together, the support base and the support cover being made of an insulating gas-generating material.

[0028] In one possible implementation, the cross-sectional area of ​​the first stationary contact and the second stationary contact of the first switching unit is larger than the cross-sectional area of ​​the first stationary contact and the second stationary contact of the second switching unit, and the cross-sectional area of ​​the moving contact of the first switching unit is larger than the cross-sectional area of ​​the moving contact of the second switching unit.

[0029] The disconnecting switch provided by this invention has at least two trip units, each corresponding to a different circuit network. Therefore, after a trip unit activates and drives the operating mechanism to trip, the faulty circuit network can be located based on the correspondence between the trip unit and the circuit network, thereby reducing the scope of fault search and improving fault diagnosis efficiency and difficulty. Simultaneously, the switching unit of this invention includes at least one first switching unit and multiple second switching units stacked together. The cross-sectional areas of the first stationary contact, second stationary contact, and moving contact of the first switching unit are larger than those of the first stationary contact, second stationary contact, and moving contact of the second switching unit. This allows the first switching unit to have a greater current-carrying capacity than the second switching unit, enabling its use in high-current circuits and preventing overheating of the moving and stationary contacts due to high current. Second through holes are provided on the support bases and support covers of the multiple second switching units, with at least one drive shaft passing through the second through hole, which improves the consistency of the opening and closing of the multiple second switching units.

[0030] Furthermore, by providing a second through hole on the support base and support cover of multiple second switch units, and having at least one drive shaft pass through the second through hole, the consistency of opening and closing of multiple second switch units can be improved.

[0031] Furthermore, the tripping status of the conditional trip unit serves as a warning and restriction, preventing the switching equipment from being closed before the fault is cleared, thus avoiding situations that could endanger personnel safety.

[0032] Furthermore, the switching unit includes a rotary contact assembly comprising a support cover, a moving contact, and a support base stacked together. A moving contact receiving groove is provided between the support cover and the support base. The moving contact also includes a contact support. The moving contact is mounted on the contact support, and the contact support is mounted in the moving contact receiving groove. The support cover and the support base are fixed by thermal riveting, which improves the creepage distance and can further enhance the insulation protection performance of the moving contact to address the risk of other switching units being damaged when the first switching unit is connected to a high current.

[0033] Furthermore, the first stationary contact and / or the second stationary contact of the first switching unit are provided with at least two first wiring portions that are electrically connected to the outside, which can increase the contact area between the first stationary contact and / or the second stationary contact and the external conductor, enhance the current carrying capacity of the first stationary contact and / or the second stationary contact, and avoid overheating of the first stationary contact and / or the second stationary contact, thus preventing safety hazards.

[0034] Furthermore, a first upper partition and a first lower partition are provided in the switching unit, and the rotating contact assembly and two arc-extinguishing grid groups are placed between the first upper partition and the first lower partition. The first upper partition and the first lower partition can clamp and fix the rotating contact assembly and the two arc-extinguishing grid groups along the thickness direction of the switching unit to form an integral arc-extinguishing space, improve the arc-extinguishing performance, and enable arc extinguishing with higher current carrying capacity.

[0035] Furthermore, the first upper partition plate and the first lower partition plate are equipped with a first support platform, a second support platform, a contact assembly receiving groove, an arc-shaped boss, and a magnet, which greatly improve the arc extinguishing performance. Attached Figure Description

[0036] Figure 1 and Figure 2 This is a schematic diagram of the structure of an embodiment of the disconnecting switch of the present invention;

[0037] Figure 3 and Figure 4 This is a schematic diagram of the operating device of the present invention;

[0038] Figure 5 and Figure 6 This is a plan view of the operating device of the present invention;

[0039] Figures 7-10 This is a schematic diagram of the operating mechanism of the present invention;

[0040] Figure 11 This is a schematic diagram of a structure of one embodiment of the re-fastener provided by the present invention;

[0041] Figure 12 and Figure 13 This is a schematic diagram of the structure of the second trip unit provided by the present invention;

[0042] Figure 14This is a schematic diagram of the structure of the first switching unit embodiment of the present invention;

[0043] Figure 15 and Figure 16 This is a schematic diagram of the rotating contact assembly of the first switching unit of the present invention;

[0044] Figure 17 yes Figure 16 Exploded view of the moving contact in the embodiment;

[0045] Figure 18 This is a schematic diagram of an embodiment of the rotating contact assembly comprising two drive shafts in the second switching unit of the present invention;

[0046] Figure 19 This is a schematic diagram of an embodiment of the rotating contact assembly including a drive shaft in the second switching unit of the present invention;

[0047] Figure 20 This is a schematic diagram of an embodiment of the second switching unit of the present invention, which includes a drive shaft.

[0048] Figure 21 This is a schematic diagram of an embodiment of the second switching unit of the present invention, which includes two drive shafts.

[0049] Figure 22 This is a schematic diagram of the structure of the second stationary contact of the first switching unit of the present invention;

[0050] The reference numerals in the attached drawings include: switch unit 100; operating mechanism 104; operating device 105; rotary contact assembly 1; second stationary contact 2; arc-extinguishing grid assembly 3; moving contact 11; first trip unit 910; second trip unit 920; first switch unit 101; second switch unit 102; re-fastening element 670; locking element 660; tripping element 610; wiring mechanism 930; first tripping rod 924; first mating part 672; coil assembly 921; push rod 922; trip unit spring 923. ; Tripping lever 924; Tripping lever drive unit 925; Reset button 926; Second mating part 673; Device housing 106; Bracket 200; Rocker arm 500; Front connecting rod 620; Rear connecting rod 630; Main spring 700; Front connecting shaft 692; Rear connecting shaft 693; Jump-lock shaft 691; Locking shaft 696; Re-locking shaft 697; Rocker arm shaft 695; Operating shaft 300; Linkage structure 400; Drive component 640; Connecting shaft 694; Linkage crank 410; Linkage rod 420; Transmission shaft 650 ; Tripping spring 800; Jump fastener 610; Housing body 114; Housing side cover 115; Re-fastening body 671; Second mating part 673; Re-fastening part 674; First contact part 21; First connecting part 22; First wiring part 23; First overlapping part 212; First extension part 213; Limiting groove 24; Support cover 12; Support seat 13; First contact 111; Second contact 112; Moving contact receiving groove 14; Second through hole 71; Drive shaft 7; Arc-shaped part 113; Fixed shaft 142; Drive Moving boss 125; hot melt column 131; hot melt hole 132; main plug 121; contact support 141; elastic element 144; turntable 103; groove 1211; arc-shaped support column 15; arc-shaped hole 161; support boss 171; arc-shaped protrusion 16; first upper partition 51; first lower partition 52; first backrest 53; second backrest 54; arc-shaped boss 531; contact assembly receiving groove 55; first through hole 56; insulating side plate 31; arc extinguishing grid 32; mounting hole 61; mounting bracket 62. Detailed Implementation

[0051] The specific embodiments of the present invention are further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the description of the following embodiments.

[0052] like Figures 1-21As shown, the disconnecting switch includes a stacked operating device 105 and a switching unit 100. The operating device 105 includes an operating mechanism 104, which is connected to the switching unit 100 and is used to drive the switching unit 100 to open or close the circuit, making or breaking the circuit. The switching unit 100 includes a housing and a rotating contact assembly 1, a first stationary contact, a second stationary contact 2, and an arc-extinguishing grid assembly 3 disposed inside the housing. The rotating contact assembly 1 includes a moving contact 11. The operating mechanism 104 is connected to the rotating contact assembly 1 and can drive the rotating contact assembly 1 to rotate inside the switching unit 100, thereby driving the moving contact 11 to contact or separate from the first stationary contact and the second stationary contact 2, completing the making or breaking of the circuit. It has the advantages of compact device and simple operation.

[0053] The operating device 105 also includes a trip unit, which is connected to the operating mechanism 104 and the control system respectively. The control system is connected to the circuit network corresponding to the trip unit. When the circuit network fails, the control system drives the trip unit to trip the operating mechanism 104. The operating mechanism 104 drives the moving contact 11 of the switch unit 100 to separate from the first stationary contact and the second stationary contact 2, thereby improving the safety protection performance of the disconnecting switch.

[0054] like Figures 1-14 As shown, the present invention provides a disconnecting switch, including an operating device 105 and a switching unit 100. The operating device 105 includes at least two trip units, each corresponding to a different circuit network. One of the trip units is a first trip unit 910, and the other is a second trip unit 920. The first trip unit 910 is used at least to drive the operating mechanism 104 to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the input terminal of the switching unit 100; that is, the first trip unit 910 corresponds to the circuit network electrically connected to the input terminal of the switching unit 100 (input circuit network), and the first trip unit 910 drives the operating mechanism 104 to trip at least when a voltage and / or current fault occurs in the input circuit network. The second trip unit 920 is used at least to drive the operating mechanism 104 to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the output terminal of the switching device; that is, the second trip unit 920 corresponds to the circuit network (output circuit network) electrically connected to the output terminal of the switching device, and the second trip unit 920 drives the operating mechanism 104 to trip at least when a voltage and / or current fault occurs in the output circuit network.

[0055] The switching unit 100 includes at least one first switching unit 101 and a plurality of second switching units 102 stacked together. Preferably, the thickness of the first switching unit 101 is greater than the thickness of the second switching unit 102. That is, the cross-sectional area of ​​the moving contact 11, the first stationary contact, and the second stationary contact 2 of the first switching unit 101 is greater than the cross-sectional area of ​​the second switching unit 102. The first switching unit 101 has a higher current carrying capacity and can be used in high-current circuits. The second switching unit 102 has a lower current carrying capacity than the first switching unit 101 and can be used in low-current circuits. The high current and low current are relative and do not limit a specific current range.

[0056] In existing technologies, a large power grid system often consists of multiple circuit networks, which are interconnected by one or more switching units 100. When a voltage and / or current fault occurs in any of the circuit networks connected to the switching unit 100, the switching unit 100 will trip. During fault diagnosis, it is necessary to check all circuit networks connected to the switching unit 100, which involves a large scope of investigation and greatly increases the difficulty and workload of fault diagnosis. Therefore, the operating device 105 of the disconnecting switch provided by the present invention has at least two trip units, each of which can correspond to different circuit networks. Thus, after a trip unit actuates and drives the operating mechanism 104 to trip, the faulty circuit network can be located based on the correspondence between the trip unit and the circuit network, thereby reducing the scope of fault search and improving fault diagnosis efficiency and difficulty. The switching unit 100 of the present invention includes at least one first switching unit 101 and a plurality of second switching units 102 stacked together. The thickness of the first switching unit 101 is greater than that of the second switching unit 102. That is, the cross-sectional area of ​​the first stationary contact, the second stationary contact 2, and the moving contact 11 of the first switching unit 101 is greater than that of the first stationary contact, the second stationary contact 2, and the moving contact 11 of the second switching unit 102. This allows the first switching unit 101 to have a greater current carrying capacity than the second switching unit 102, and it can be used in high-current circuits to prevent the moving and stationary contacts from overheating and malfunctioning due to high current.

[0057] Furthermore, in the operating device 105, each trip unit is connected to the upper control system (e.g., a host computer or an intelligent controller / intelligent control chip integrated inside the switch unit 100). The control system is connected to the circuit network corresponding to each trip unit and is used to monitor the operating status of each circuit network. When a current and / or voltage fault occurs in a certain circuit network, the control system outputs a trip signal to the corresponding trip unit to make the trip unit act, thereby driving the operating mechanism 104 to trip.

[0058] Specifically, "current fault" can be overload current fault, short circuit current fault, etc., while "voltage fault" can be overvoltage fault, undervoltage fault, etc.

[0059] Furthermore, the second trip unit 920 is a conditional trip unit. The reset operation of the conditional trip unit is independent of the re-tightening operation of the operating mechanism 104. The conditional trip unit is driven to reset by an external force (for example, the external force is the force from the operator or the mechanical force other than the switchgear of the present invention, or the external force comes from the mechanical force installed in the switchgear of the present invention). Only after the conditional trip unit is reset from the trip unit action state to the trip unit reset state is the operating mechanism 104 allowed to re-tighten. That is, after the conditional trip unit drives the operating mechanism 104 to trip, the operating mechanism 104 can only re-tighten after the conditional trip unit is reset from the trip unit action state to the trip unit reset state under the drive of an external force (i.e., after the reset operation of the conditional trip unit is completed). Thus, the operating mechanism 104 can perform normal closing and opening operations. The trip unit action state of the conditional trip unit plays a warning and restriction role, avoiding closing the switchgear before the fault is cleared, which could cause safety hazards.

[0060] Furthermore, among the at least two trip units, all trip units other than the conditional trip unit are general trip units. When the operating mechanism 104 trips again from the tripped state, the reset structure of the switching unit 100 (e.g., the rocker arm of the operating mechanism 104) drives the general trip unit to reset from the trip unit operating state to the trip unit reset state. That is, after any of the general trip units trips the operating mechanism 104, when the operating mechanism 104 trips again (i.e., during the re-tripping operation of the operating mechanism 104), the reset structure of the switching unit 100 drives the general trip unit to reset from the operating state to the trip unit reset state, without the need for separate reset of the general trip units. Of course, as another degraded embodiment, all trip units can also be general trip units.

[0061] Specifically, such as Figures 3-13 As shown, the operating mechanism 104 also includes a rotatably mounted re-fastening member 670, which has a first limiting engagement with the locking member 660. In normal operation (operating mechanism 104 in open state, operating mechanism 104 in closed state, operating mechanism 104 performing manual closing operation, and operating mechanism 104 performing manual opening operation), the re-fastening member 670 and the locking member 660 maintain the first limiting engagement, ensuring that the locking member 660 and the tripping member 610 are engaged. In the closed state, after each trip unit receives a corresponding tripping signal, it drives the re-fastening member 670 to rotate and release the first limiting engagement from the locking member 660, thereby releasing the tripping member 610 from the locking member 660.

[0062] Furthermore, after receiving the corresponding trip signal, the conditional trip unit drives the re-clamping member 670 to rotate, thereby releasing the first limit engagement with the locking member 660 and holding the re-clamping member 670 in the tripped position. This causes the tripping member 610 and the locking member 660 to disengage, thus switching the operating mechanism 104 from the closed state to the tripped state. When the conditional trip unit is in the activated state, the re-clamping member 670 is held in the tripped position, preventing the tripping member 610 and the locking member 660 from restoring and maintaining the engagement. The operating mechanism 104 cannot engage again. After the conditional trip unit resets, it releases the limit on the re-clamping member 670, allowing the re-clamping member 670 to reset and establish the first limit engagement with the locking member 660. This allows the tripping member 610 and the locking member 660 to restore and maintain the engagement.

[0063] Furthermore, such as Figures 3-11 As shown, each of the trip units is a direct-acting trip unit and includes an electromagnetic coil. The operating device 105 in this embodiment also includes a wiring mechanism 930, which is used to connect the electromagnetic coil of each trip unit to an external circuit (e.g., a control system). The wiring mechanism 930 improves the wiring convenience of each trip unit. Furthermore, the wiring mechanism 930 is a plug-in type wiring component.

[0064] Specifically, the first trip unit 910 can be implemented using existing technology. For example, the first trip unit 910 includes a first coil assembly (which includes an electromagnetic coil), a first push rod, a first trip unit spring, and a first trip lever 924. The first trip lever 924 is in transmission engagement with the first mating part 672 of the re-fastener 670. After receiving the corresponding trip signal, the first trip unit 910 drives the re-fastener 670 to rotate through the first trip lever 924, thereby releasing the first limiting engagement with the locking member 660, thus releasing the latching engagement between the trip fastener 610 and the locking member 660.

[0065] Specifically, such as Figures 12-13The diagram illustrates one embodiment of the second trip unit 920: The second trip unit 920 of this embodiment includes a coil assembly 921 (which includes an electromagnetic coil), a push rod 922, a trip unit spring 923, and a trip lever 924; one end of the push rod 922 is movably inserted into the coil assembly 921, and the other end is fixedly connected to the trip lever 924; the trip unit spring 923 acts on both the coil assembly 921 and the push rod 922; the trip lever 924 includes a trip lever drive portion 925 that engages with the re-clamping member 670, and a reset button 926 disposed on the trip lever drive portion 925. After receiving the corresponding trip signal, the second trip unit 920 drives the push rod 922 to push out. The trip rod 924 moves synchronously with the push rod 922, causing the trip rod driving part 925 to press against the re-fastening member 670 (specifically the second mating part 673 of the re-fastening member 670) and drive it to rotate so that the re-fastening member 670 and the locking member 660 are released from the first limiting engagement, thereby releasing the latching engagement of the jump fastener 610 and the locking member 660. At the same time, one end of the reset button 926 protrudes outside the device housing 106. When the reset button 926 is pressed by external force, it drives the second trip unit 920 to reset.

[0066] like Figures 3-11 As shown, the length direction, width direction and height direction of the operating mechanism 104 are direction d1, direction d2 and direction d3 respectively, and direction d1, direction d2 and direction d3 are perpendicular to each other.

[0067] like Figure 4-11As shown, the operating mechanism 104 further includes a bracket 200, a rocker arm 500, a front connecting rod 620, a rear connecting rod 630, and a main spring 700. The rocker arm 500, the jump fastener 610, the locking fastener 660, and the re-fastener 670 are rotatably mounted on the bracket 200, and their rotation axes are all parallel to direction d3. The jump fastener 610, the locking fastener 660, and the re-fastener 670 are arranged sequentially along direction d2. The first release device 910 is arranged side by side with the operating mechanism 104 along direction d3, and the first release device 910 is arranged sequentially with the re-fastener 670 along direction d3. The second release device 920 is arranged side by side with the operating mechanism 104 along direction d1, and the second release device 670 is arranged sequentially with the re-fastener 670 along direction d1. The first release device 910 is located on direction d3 between the re-fastener 670 and the operating mechanism 104. The second trip unit 920 is on the same side; on the projection of the operating device 105 perpendicular to direction d3, the second trip unit 920 is located on the same side of the operating mechanism 104 and the first trip unit 910; one end of the trip fastener 610 (the pivot end of the trip fastener) is rotatably mounted on the bracket 200 and the other end (the latch end of the trip fastener) is latched with the locking fastener 660; one end of the front connecting rod 620 is rotatably connected to the middle part of the trip fastener 610 (the part of the trip fastener 610 located at the pivot end and the latch end of the trip fastener) through the front connecting shaft 692, and the other end is rotatably connected to one end of the rear connecting rod 630 through the rear connecting shaft 693. The rear connecting rod 630 is used for transmission connection with the rotating contact assembly 1 of the switching device; the two ends of the main spring 700 are respectively connected to the rear connecting shaft 693 and the rocker arm 500. The operating mechanism 104 is a four-bar to five-bar conversion operating mechanism, and its operation process and working principle are the same as those of the prior art, and will not be elaborated here.

[0068] Specifically, the jump fastener 610 is rotatably mounted on the bracket 200 via the jump fastener shaft 691, the locking fastener 660 is rotatably mounted on the bracket 200 via the locking shaft 696, the re-fastener 670 is rotatably mounted on the bracket 200 via the re-fastener shaft 697, and the rocker arm 500 is rotatably mounted on the bracket 200 via the rocker arm shaft 695.

[0069] Furthermore, such as Figures 4-11 As shown, the operating mechanism 104 also includes an operating shaft 300 for external force operation, a linkage structure 400, and a driving component 640. The operating shaft 300 and the driving component 640 are rotatably arranged, and their rotation axes are both parallel to direction d3.

[0070] The operating shaft 300 is connected to the rocker arm 500 via the linkage structure 400 to drive the rocker arm 500 to rotate, so that the operating mechanism 104 performs the closing operation, the opening operation and the re-clamping operation. One end of the rear connecting rod 630 is rotatably connected to the front connecting rod 620 via the rear connecting shaft 693, and the other end is rotatably connected to the driving member 640 via the connecting shaft 694. The driving member 640 is coaxially arranged with the rotating contact assembly 1 of the switchgear and is rotatably connected to the rotating contact assembly 1 of the switchgear.

[0071] Specifically, the operating shaft 300 and the driving component 640 are coaxially arranged; the operating shaft 300 is rotatably mounted on the bracket 200, and the driving component 640 is sleeved on the operating shaft 300 (specifically, the driving component 640 has a driving component shaft hole in the middle for the operating shaft 300 to pass through); the linkage structure 400 includes a linkage crank 410 and a linkage rod 420 that are arranged on the operating shaft 300 and rotate synchronously therewith, one end of the linkage rod 420 is rotatably connected to the linkage crank 410 and the other end is rotatably connected to the rocker arm 500; the operating shaft 300 is preferably connected to the two rocker arm legs of the rocker arm 500 through two sets of linkage structures 400.

[0072] Furthermore, the operating shaft 300, rocker arm 500, linkage structure 400, front connecting rod 620, rear connecting rod 630, main spring 700, and driving component 640 of the operating mechanism 104 are rotatably mounted on the bracket 200, and their rotation axes are all parallel to direction d3. The operating shaft 300 is connected to the rocker arm 500 via the linkage structure 400. One end of the jump fastener 610 is rotatably mounted on the bracket 200 via the jump fastener shaft 691, and the other end is engaged with the locking component 660. The two ends of the connecting rod 620 are rotatably connected to the middle of the jump fastener 610 and one end of the rear connecting rod 630 via the front connecting shaft 692 and the rear connecting shaft 693, respectively. The other end of the rear connecting rod 630 is rotatably connected to the driving member 640. The two ends of the main spring 700 are connected to the rear connecting shaft 693 and the rocker arm 500, respectively. The rocker arm 500 and the driving member 640 are located at the two ends of the operating mechanism 104 in the direction d1, respectively. The fastener 670 and the jump fastener shaft 691 are located at the two ends of the operating mechanism 104 in the direction d2, respectively.

[0073] Furthermore, such as Figures 4-11 As shown, the operating mechanism 104 also includes a transmission shaft 650, which is connected to and rotates synchronously with the drive member 640. The transmission shaft 650 is arranged to move circumferentially around the rotation axis of the drive member 640. One radial end of the drive member 640 is rotatably connected to the rear connecting rod 630 through a connecting shaft 694, and the other radial end is fixedly connected to the transmission shaft 650. One axial end of the transmission shaft 650 is used to drive the rotating contact assembly 1 of the switchgear.

[0074] In another embodiment where the drive member 640 is connected to the rotary contact assembly 1, one axial end of the drive member 640 is connected to the rotary contact assembly 1.

[0075] Furthermore, such as Figure 5-10 As shown, the operating mechanism 104 also includes a release spring 800, which acts on the jump fastener 610. When the operating mechanism 104 is released, the jump fastener 610 is accelerated to rotate, thereby improving the release efficiency of the operating mechanism 104.

[0076] Furthermore, the first trip unit 910 and the second trip unit 920 are located within the space enclosed by the housing body 114 and the housing side cover 115, which facilitates the replacement, maintenance and disassembly of the trip units and realizes the modular assembly of the trip units and the operating mechanism.

[0077] like Figures 4-10 , Figure 11 As shown, the re-fastening member 670 is rotatably mounted in the middle (specifically, the re-fastening member 670 is rotatably mounted on the bracket 200 of the operating mechanism 104), and its two ends are respectively engaged with the first trip unit 910 and the second trip unit 920. Further, the re-fastening member 670 includes a re-fastening body 671, a first mating part 672 engaged with the first trip unit 910, a second mating part 673 engaged with the second trip unit 920, and a re-fastening part 674 engaged with the locking member 660 for limiting. One end of the re-fastening body 671 is rotatably mounted on the bracket 200 of the operating mechanism 104 via a re-fastening shaft 697, and this end of the re-fastening body 671 is connected to the second mating part 673 and the re-fastening part 674 respectively. The other end of the re-fastening body 671 is provided with the first mating part 672. The first mating part 672 and the second mating part 673 are located at both ends of the re-fastening member 670 in the overall structure of the re-fastening member 670. Furthermore, the second mating part 673, the re-fastening part 674, and the re-fastening body 671 are arranged sequentially along the rotation direction of the re-fastener 670 (i.e., the circumferential direction of the re-fastening shaft 697); the second mating part 673, the re-fastening part 674, and the re-fastening body 671 are arranged sequentially along direction d1; the first mating part 672 is disposed on one side of the re-fastening body 671 along the rotation axis of the re-fastener 670 (i.e., along the axial direction of the re-fastener 697); the first mating part 672 is located on the same side of the second mating part 673, the re-fastening part 674, and the re-fastening body 671 in direction d1. Figure 11 This is one embodiment of the fastener 670 provided in this application.

[0078] It should be noted that the re-fastener 670 is not limited to the above-described implementation. Those skilled in the art can adjust the specific structure of the re-fastener 670 based on the positional relationship and transmission structure between the re-fastener 670, the first trip unit 910, and the second trip unit 920, using conventional technical means in the art.

[0079] Furthermore, such as Figure 3 , Figure 4 As shown, the operating device 105 in this embodiment also includes a device housing 106, and the operating mechanism 104 and each trip unit are disposed inside the device housing 106.

[0080] like Figures 3-9 As shown, the operating device 105 of this embodiment is provided with two trip units, one of which is the first trip unit 910 and the other is the second trip unit 920.

[0081] Specifically, the switching device of the present invention is preferably applied to a photovoltaic power generation system, with its input terminal electrically connected to the circuit network of the photovoltaic panel and its output terminal connected to the circuit network of the distribution cabinet; the first trip unit 910 corresponds to the circuit network of the photovoltaic panel, and the second trip unit 920 corresponds to the circuit network of the distribution cabinet; when a current and / or voltage fault occurs in the circuit network of the photovoltaic panel, the first trip unit 910 drives the operating mechanism 104 to trip; when a current and / or voltage fault occurs in the circuit network of the distribution cabinet, the second trip unit 920 drives the operating mechanism 104 to trip. Further, the distribution cabinet is equipped with at least one electrical device, such as an inverter.

[0082] In other embodiments, the switching device of the present invention can also be applied between a power supply circuit network and a load circuit network, wherein the power supply circuit network is electrically connected to the input terminal of the switching device, and the load circuit network is electrically connected to the output terminal of the switching device; the first trip unit 910 corresponds to the power supply circuit network, and when a current and / or voltage fault occurs in the power supply circuit network, the first trip unit 910 drives the operating mechanism 104 to trip; the second trip unit 920 corresponds to the load circuit network, and when a current and / or voltage fault occurs in the load circuit network, the second trip unit 920 drives the operating mechanism 104 to trip.

[0083] Furthermore, such as Figures 3-9 As shown, the first trip unit 910 is a general trip unit, and the second trip unit 920 is a conditional trip unit.

[0084] Specifically, after the first trip unit 910 trips the operating mechanism 104, during the re-clamping process of the operating mechanism 104, the rocker arm 500 of the operating mechanism 104 drives the first trip unit 910 to reset from the trip unit action state to the trip unit reset state. After the second trip unit 920 (conditional trip unit) trips the operating mechanism 104, it engages with the re-clamping member 670 of the operating mechanism 104 to keep it in the tripped position, preventing the re-clamping member 670 from resetting and establishing a first limit engagement with the locking member 660. This prevents the tripping member 610 and the locking member 660 from restoring and maintaining the latching engagement, thus preventing the operating mechanism 104 from successfully re-clamping, i.e., the switchgear cannot be closed.

[0085] Furthermore, such as Figure 3-7 As shown, the second trip unit 920 (conditional trip unit) includes a trip lever 924 for driving the operating mechanism 104 to trip, and the trip lever 924 includes a reset button 926; when the second trip unit 920 (conditional trip unit) is in the trip unit's operating state, one end of the reset button 926 protrudes outside the device housing 106 and the trip lever 924 is limited and engaged with the re-clamping member 670 to keep it in the re-clamping member 670 tripped position.

[0086] Specifically, such as Figures 14-21 As shown, the switching unit 100 includes a first stationary contact and a second stationary contact 2. The first stationary contact and the second stationary contact 2 are cross-arranged with two arc-extinguishing grid groups 3. The first stationary contact and / or the second stationary contact 2 of the first switching unit 101 includes a first contact portion 21, a first connecting portion 22 and at least two first wiring portions 23 integrally formed and connected in sequence. The first contact portion 21 extends into the housing and cooperates with the moving contact 11 of the rotating contact assembly 1. The at least two first wiring portions 23 extend to the outside of the housing for electrical connection with the outside. They can be connected to external wires or soldered to the PCB board. The first wiring portions 23 and the external wires can be fixedly connected by welding, riveting or other methods. Alternatively, the first wiring portion 23 is provided with screws and nuts, and the first wiring portion 23 can be fixedly connected to the external wires by the screws and nuts. By providing at least two first wiring portions 23 connected to external wires, the contact area between the first stationary contact and / or the second stationary contact 2 and the external wires can be increased, thereby enhancing the current-carrying capacity of the first stationary contact and / or the second stationary contact 2 and preventing overheating of the first stationary contact and / or the second stationary contact 2, which could lead to safety hazards.

[0087] Furthermore, such as Figure 22 As shown, in this embodiment, the second stationary contact 2 includes two parallel first wiring portions 23, which are perpendicular to the first connecting portion 22. One end of each first wiring portion 23 is connected to the first contact portion 21. The first contact portion 21 includes a first overlapping portion 212 and a first extension portion 213. The first overlapping portion 212 is connected to the moving contact 11. The first extension portion 213 increases the cross-sectional area of ​​the second stationary contact 2, thereby increasing its current-carrying capacity and improving the current-carrying capacity of the switching unit 100. The first extension portion 213 is rectangular, and its length is greater than or equal to the distance between the two first wiring portions 23. An angle is formed between the first extension portion 213 and the first connecting portion 22. The angle is recessed towards the first connecting portion 22 to form a limiting groove 24, which is used to limit one end of the arc-extinguishing grid assembly 3. In this embodiment, the first stationary contact includes one first wiring portion 23.

[0088] Preferably, the thickness of the first stationary contact and the second stationary contact 2 of the first switching unit 101 is greater than the thickness of the first stationary contact and the second stationary contact 2 of the second switching unit 102, and the second stationary contact 2 of the second switching unit 102 includes a first wiring portion 23 and does not have a first extension portion 213, so that the first stationary contact and the second stationary contact 2 of the first switching unit 101 have a greater current-carrying capacity.

[0089] Preferably, the rotary contact assembly 1 of the switch unit 100 of this application includes a support cover 12, a moving contact 11, and a support base 13 stacked sequentially. The support base 13 and the support cover 12 clamp the moving contact 11. The moving contact 11 includes a first contact 111 and a second contact 112 disposed opposite to each other. The two ends of the first contact 111 and the second contact 112 have clamping gaps to accommodate a first stationary contact and a second stationary contact 2. The moving contact 11 is connected to or disconnected from the first stationary contact and the second stationary contact 2 through the clamping gaps. A moving contact receiving groove 14 is provided between the support base 13 and the support cover 12. A limiting structure is provided in the moving contact receiving groove 14, and the moving contact 11 is limited within the moving contact receiving groove 14.

[0090] Preferably, the disconnecting switch includes multiple second switching units 102. The support base 13 and support cover 12 of each second switching unit 102 are provided with second through holes 71. At least one drive shaft 7 passes through the second through hole 71 and is simultaneously linked to the rotating contact assembly 1 of the multiple second switching units 102. The drive shaft 7 is directly or indirectly connected to the operating mechanism 104. Providing the second through hole 71 on the support base 13 and support cover 12 of the multiple second switching units 102, and having at least one drive shaft 7 pass through the second through hole 71, can improve the consistency of the opening and closing of the multiple second switching units 102.

[0091] Each second switching unit 102 includes a housing. The support base 13 and support cover 12 of the second switching unit 102 are provided with second through holes 71. At least one drive shaft 7 passes through the second through holes 71 on the support base 13 and support cover 12 of the multiple second switching units 102, and is simultaneously linked with the rotating contact assemblies 1 of the multiple second switching units 102. By providing second through holes 71 on the support base 13 and support cover 12, and allowing at least one drive shaft 7 to pass through the second through holes 71 on the support base 13 and support cover 12 of the multiple second switching units 102, the consistency of the opening and closing of the multiple second switching units 102 can be improved.

[0092] Specifically, such as Figure 19 and Figure 20As shown, in one embodiment, a drive shaft 7 passes through the rotary contact assemblies 1 of multiple second switch units 102 and is drivenly connected to the rotary contact assemblies 1 of multiple second switch units 102. A second through hole 71 with the same cross-sectional shape as the drive shaft 7 is formed on the moving contact 11, support base 13 and support cover 12 of the rotary contact assembly 1. A drive shaft 7 is provided that passes through the rotary contact assembly 1 and also passes through the moving contact 11, which greatly increases the consistency of the opening and closing of multiple second switch units 102.

[0093] Furthermore, the drive shaft 7 and the second through hole 71 are in a concave-convex fit, mutually limiting each other along the rotation direction of the drive shaft 7. For example, preferably, as shown... Figure 19 As shown, the second through hole 71 is shaped like a plum blossom, and the cross-section of the drive shaft 7 is also the same shape as the second through hole 71. The drive shaft 7 and the second through hole 71 have a concave-convex fit, resulting in a better driving effect.

[0094] Furthermore, such as Figure 19 As shown, the middle part of the moving contact 11 extends to both sides along the width direction to form two arc-shaped parts 113, which can increase the area of ​​the middle part of the moving contact 11. Since the middle part of the moving contact 11 is penetrated by the drive shaft 7 to form the second through hole 71, the arc-shaped parts 113 on both sides of the moving contact 11 can increase the structural strength of the moving contact 11 and enhance its service life.

[0095] Furthermore, in one embodiment provided by this application, the moving contact 11 is provided with two fixed shafts 142, which are disposed on both sides of the second through hole 71.

[0096] Furthermore, the drive shaft 7 has at least two recessed areas, and two drive protrusions 125 are provided on the upper part of the support cover 12 of the rotary contact assembly 1. The two drive protrusions 125 on the support cover 12 are placed in the two recessed areas and abut against the drive shaft 7. The two drive protrusions 125 that cooperate with the drive shaft 7 are provided on the upper part of the support cover 12. During the process of the drive shaft 7 driving the rotary contact assembly 1 to rotate, the stability of the rotation of the rotary contact assembly 1 can be increased.

[0097] Preferred, such as Figure 18 and Figure 21 As shown, in another embodiment, two parallel drive shafts 7 are spaced apart at the center of the plurality of second switch units 102. Two second through holes 71 are correspondingly provided on the support base 13 and the support cover 12. The two drive shafts 7 pass through the two second through holes 71 respectively, so that the moving contact 11 is positioned between the two drive shafts 7. Providing two drive shafts 7 makes the rotation of the rotating contact assembly 1 more stable.

[0098] Furthermore, in one embodiment provided in this application, the middle part of the moving contact 11 is recessed towards the central region of the moving contact 11 along the width direction to form a clearance area for the two drive shafts 7. The two drive shafts 7, which pass through the support base 13 and the support cover 12, extend into the clearance area of ​​the moving contact 11 and abut against the middle part of the moving contact 11, thereby driving the moving contact 11 to rotate together.

[0099] Furthermore, the moving contact 11 provided in this embodiment includes two fixed shafts 142, which are distributed along the length direction of the moving contact 11.

[0100] Preferably, the drive shaft 7 of the second switch unit 102 adjacent to the first switch unit 101 or the operating mechanism 104 can partially extend out of the housing and be directly or indirectly connected to the operating mechanism 104 as part of the linkage mechanism. Specifically, a turntable 103 is connected between the operating mechanism 104 and the drive shaft 7. The operating mechanism 104 drives the turntable 103, which in turn drives the drive shaft 7 to rotate. The drive shaft 7 drives multiple rotating contact assemblies 1 to rotate, thereby completing the opening and closing of multiple second switch units 102 and improving the consistency of the opening and closing of multiple second switch units 102.

[0101] Furthermore, the drive shaft 7 of the second switch unit 102, which is furthest from the operating mechanism 104, can pass only through the rotating contact assembly 1 of the second switch unit 102 without penetrating the bottom of the housing.

[0102] Specifically, in the embodiments provided in this application, the moving contact 11 extends out of the support base 13 and the support cover 12 at both ends to overlap with the first stationary contact and the second stationary contact 2.

[0103] Preferred, such as Figure 16 As shown, a hot melt column 131 and a hot melt hole 132 are provided between the support base 13 and the support cover 12, or a hot melt column 131 and a hot melt groove are provided between the support base 13 and the support cover 12. The support base 13 and the support cover 12 are installed and fixed by the hot melt column 131 and the hot melt hole 132 / or the hot melt column 131 and the hot melt groove.

[0104] Furthermore, the support base 13 is provided with two hot melt pillars 131 spaced apart, and the support cover 12 is provided with two hot melt holes 132 at positions relative to the hot melt pillars 131 of the support base 13. The support base 13 and the support cover 12 are stacked and fixedly installed along the thickness direction of the moving contact 11. After the moving contact 11 is installed between the support base 13 and the support cover 12, the two hot melt pillars 131 are located on both sides of the moving contact 11 and are symmetrical with the rotation axis of the moving contact 11.

[0105] By fusing the hot-melt column 131 and the hot-melt hole 132 together using a hot-melt process, gas leakage can be reduced and creepage distance increased. After the support base 13 and support cover 12 are installed and fixed, the cooperation of the hot-melt column 131 and the hot-melt hole 132 enhances the spatial sealing of the middle part of the support base 13 and support cover 12, allowing the gas generated by the arc burning the support base 13 and support cover 12 to move towards both ends of the moving contact 11, thereby propelling the arc towards the arc-extinguishing chamber and accelerating arc extinguishing. Of course, in other embodiments, the support base 13 and support cover 12 can also be fixed using screws or other methods, but their sealing performance is somewhat inferior to that of the hot-melt column 131 and hot-melt hole 132.

[0106] Hot melt technology has the advantages of simple structure, no need for additional fastening parts, good sealing after fixing, and not easy to leak air. The hot melt processing is vibration-free, pollution-free, noise-free, environmentally friendly, energy-saving, fast and efficient.

[0107] Furthermore, such as Figure 16 As shown, the linkage mechanism that drives the rotating contact assembly 1 to rotate includes a main plug 121 disposed on the upper part of the support cover 12; or, in other embodiments, the main plug 121 is not disposed on the upper part of the support cover 12, and the moving contact 11 includes at least one fixed shaft 142, which is fixed in the middle of the first contact 111 and the second contact 112, so that the first contact 111 and the second contact 112 are fixed as a whole, and the clamping gap is formed at both ends of the moving contact 11; or, the upper part of the support cover 12 includes the main plug 121, and at least one fixed shaft 142 is also disposed on the moving contact 11.

[0108] Preferably, the moving contact 11 further includes a contact support 141 and at least one fixed shaft 142. The contact support 141 has two grooves on opposite sides, and the two grooves are through-type along the length of the moving contact 11. The middle portions of the first contact 111 and the second contact 112 of the moving contact 11 are respectively placed in the two grooves. At least one fixed shaft 142 passes through the middle portions of the first contact 111, the second contact 112 and the contact support 141, so that the first contact 111, the second contact 112 and the contact support 141 are fixed as a whole. The moving contact receiving groove 14 is provided with a limiting structure that cooperates with the contact support 141, and the contact support 141 is disposed in the moving contact receiving groove 14.

[0109] In this embodiment, a contact support 141 is provided in the middle of the moving contact 11. The two opposite sides of the contact support 141 have grooves, which are through structures along the length of the moving contact 11. The middle parts of the first contact 111 and the second contact 112 of the moving contact 11 are respectively placed in the two grooves. The clamping gaps at both ends of the moving contact 11 extend out of the grooves and are inserted into the first stationary contact and the second stationary contact 2. The contact support 141 plays a good role in wrapping the moving contact 11, which enhances the structural strength of the moving contact 11. The support base 13 and the support cover 12 are matched with the contact support 141 for limiting. All three are made of insulating material, which makes it easy to form a whole. Compared with the prior art, the moving contact 11 of this application has better stability and higher structural strength.

[0110] Furthermore, such as Figure 17 As shown, the moving contact 11 further includes at least one elastic element 144. The at least one elastic element 144 is disposed on the opposite side of the first contact 111 and / or the second contact 112. The elastic element 144 on the moving contact 11 provides clamping force to the clamping gap at both ends of the moving contact 11, improving the clamping effect between the moving contact 11 and the first stationary contact and the second stationary contact 2. It also effectively improves the current-carrying capacity and temperature rise performance of the disconnecting switch. In a preferred embodiment of this application, at least one fixed shaft 142 passes through the first contact 111, the second contact 112, the contact support 141, and at least one elastic element 144, fixing the first contact 111, the second contact 112, the contact support 141, and at least one elastic element 144 into a single unit; or at least one fixed shaft 142 is fixed in the middle of the first contact 111, the second contact 112, and at least one elastic element 144, fixing the first contact 111, the second contact 112, and at least one elastic element 144 into a single unit.

[0111] Furthermore, in the preferred embodiment provided in this application, an elastic element 144 is respectively provided on the two opposite sides of the moving contact 11, and a fixed shaft 142 is provided in the middle of the moving contact 11. The fixed shaft 142 passes through the middle of the first contact 111, the second contact 112, the two elastic elements 144 and the contact support 141, fixing the first contact 111, the second contact 112, the two elastic elements 144 and the contact support 141 into a whole, and is installed in the moving contact receiving groove 14 between the support base 13 and the support cover 12, and is clamped and fixed by the support base 13 and the support cover 12.

[0112] Specifically, in this embodiment, the moving contact 11 of the first switching unit 101 includes the contact support 141. When the thickness of the first switching unit 101 is increased, the space between the support cover 12 and the support base 13 is also increased, which may cause the moving contact 11 to be not firmly fixed. At this time, adding the contact support 141 improves the stability of the moving contact 11 in the first switching unit 101 to a certain extent.

[0113] Furthermore, as the current-carrying capacity of the first switching unit 101 is increased, the electric arc generated by the opening and closing of the first switching unit 101 will also be enhanced. In order to extinguish the stronger electric arc, the thickness of the arc-extinguishing grid plate group 3 of the first switching unit 101 is greater than the thickness of the arc-extinguishing grid plate group 3 of the second switching unit 102.

[0114] Preferably, the disconnecting switch includes multiple stacked first switch units 101, and the linkage mechanism of the first switch unit 101 disposed on the operating surface protrudes from the housing. The operating mechanism 104 includes a turntable 103, which is connected to the linkage mechanism. The operating mechanism 104 drives the multiple rotating contact assemblies 1 to rotate by driving the turntable 103 to drive the linkage mechanism.

[0115] Preferably, the drive shaft 7 of the second switch unit 102 disposed on the operating surface protrudes from the housing. The operating mechanism 104 includes a turntable 103, which is connected to the protruding end of the drive shaft 7. The operating mechanism 104 drives the drive shaft 7 to rotate by driving the turntable 103. The drive shaft 7 drives multiple rotating contact assemblies 1 to rotate.

[0116] In one embodiment, the disconnecting switch includes a plurality of first switch units 101 and a plurality of second switch units 102 stacked together. Adjacent first switch units 101 and second switch units 102 are driven to be connected. The operating device 105 is disposed on the operating surface of the first switch unit 101. A turntable 103 is connected between the operating mechanism 104 and the first switch unit 101. The operating mechanism 104 drives the rotating contact assembly 1 of the first switch unit 101 to rotate, thereby driving the rotating contact assembly 1 of the second switch unit 102 to rotate.

[0117] Preferred, such as Figure 15 and Figure 16 As shown, a main plug 121 is provided in the middle of the outer surface of the support cover 12. The main plug 121 is located above the moving contact receiving groove 14 and corresponds to the position of the moving contact receiving groove 14. The main plug 121 extends out of the upper surface of the support cover 12. A first plug hole is provided at the bottom of the support base 13. The protruding part of the main plug 121 can be embedded in the first plug hole for connection with the support base 13 of the rotating contact assembly 1 of the adjacent disconnecting switch unit 100.

[0118] Furthermore, the main plug 121 has multiple grooves 1211 extending along the thickness direction of the moving contact 11 on both sides. The cross-section of the multiple grooves 1211 forms a fishbone-like structure. The first plug hole has a protrusion structure that drives and cooperates with the grooves 1211 of the main plug 121. The multiple grooves 1211 on the main plug 121 can increase the friction between the main plug 121 and the first plug hole, making the installation of the multiple rotating contact assemblies 1 stacked along the thickness direction of the moving contact 11 more secure.

[0119] In one possible implementation, the support cover 12 is further provided with a second plug hole at the position of the main plug 121, and the main plug 121 can be inserted into the second plug hole along the thickness direction of the moving contact 11.

[0120] In another possible implementation, the support cover 12 does not have a second plug hole, and the main plug 121 is integrally formed with the support cover 12.

[0121] When the operating mechanism 104 of the disconnecting switch and multiple switching units 100 are stacked, the rotating contact assemblies 1 of adjacent switching units 100 are stacked and inserted into a whole along the thickness direction of the moving contact 11. The linkage mechanism of the operating mechanism 104 is connected to the rotating contact assembly 1 to realize the linkage operation of multiple rotating contact assemblies 1. The multiple switching units 100 are stacked and spliced, which is convenient for installation and easy to replace when individual switching units 100 are damaged.

[0122] When multiple rotary contact assemblies 1 are used, the multiple rotary contact assemblies 1 can be engaged by the protruding portion of the main plug 121 on the support cover 12 of one rotary contact assembly 1 with the first plug hole at the bottom of the support seat 13 of another rotary contact assembly 1.

[0123] The limiting structure includes the sidewall of the moving contact receiving groove 14. The contact support 141 is placed inside the moving contact receiving groove 14 and is limited and engaged with the sidewall of the moving contact receiving groove 14. Two arc-shaped support columns 15 are arranged opposite each other along the width direction of the moving contact 11. After the support base 13, support cover 12 and contact support 141 are installed, the two arc-shaped support columns 15 are located on both sides of the contact support 141. The two arc-shaped support columns 15 extend along the thickness direction of the moving contact 11. The arc-shaped support columns 15 form part of the sidewall of the moving contact receiving groove 14. The support cover 12 includes an arc-shaped hole 161 or an arc-shaped groove that mates with the arc-shaped support columns 15. The arc-shaped support columns 15 pass through the arc-shaped hole 161 or arc-shaped groove, so that the support base 13 and support cover 12 are installed and fixed.

[0124] Specifically, such as Figure 2As shown, at least one first switch unit 101 and multiple second switch units 102 stacked in this application can achieve linkage operation through a linkage mechanism. The first wiring portion 23 of the first stationary contact and the second stationary contact 2 of each layer are staggered left and right in the thickness direction of the switch unit 100. The linkage mechanism includes a main plug 121 and / or an arc-shaped support column 15 and a drive shaft 7.

[0125] Preferred, such as Figure 15 and Figure 16 As shown, the support base 13 and the support cover 12 are disc-shaped structures with the same diameter. Multiple weight-reducing holes are provided on the support base 13 and the support cover 12 to reduce their weight. Preferably, the weight-reducing holes are located away from the center of the support base 13 and the support cover 12.

[0126] The support base 13 and support cover 12 are made of insulating gas-generating material. When the moving contact 11 contacts or separates from the first stationary contact and the second stationary contact 2, an electric arc is generated. Under the high temperature erosion of the electric arc, the support base 13 and support cover 12 generate gas to cool the electric arc. At the same time, the generated gas will also propel the electric arc toward the arc-extinguishing chamber, thereby accelerating the arc extinguishing.

[0127] Furthermore, the maximum length of the moving contact 11 in its longitudinal direction is less than or equal to the diameter of the support base 13 and the support cover 12. There are two sliding grooves between the edges of the support base 13 and the support cover 12. The two sliding grooves are respectively arranged on both sides of the width direction of the moving contact receiving groove 14. An isolation boss is provided between the sliding groove and the moving contact receiving groove 14 to separate the sliding groove and the moving contact receiving groove 14, thereby improving the insulation performance and preventing electric arc erosion of the moving contact 11. Only one end of the two sliding grooves is connected to both ends of the moving contact receiving groove 14, so that the first stationary contact and the second stationary contact 2 extending into the sliding groove can cooperate with the clamping gaps at both ends of the moving contact 11. The first stationary contact and the second stationary contact 2 extend into the two sliding grooves respectively, corresponding to the rotation trajectory of the support base 13 and the support cover 12 and the clamping gaps at both ends of the moving contact 11, which are either inserted or disconnected. After the moving contact 11 is installed between the support base 13 and the support cover 12, the two ends of the moving contact 11 will not protrude from the support base 13 and the support cover 12, which can further improve the insulation performance. Moreover, the arc can be guided into the arc extinguishing chamber through the sliding groove.

[0128] Of course, in other embodiments, the length of the moving contact 11 may also be longer than the diameter of the support base 13 and the support cover 12. That is, after the moving contact 11 is installed between the support base 13 and the support cover 12, both ends of the moving contact 11 can extend out of the support base 13 and the support cover 12. The first stationary contact and the second stationary contact 2 are inserted and engaged with the moving contact 11 outside the support base 13 and the support cover 12. All of these are within the scope of protection of this application.

[0129] Preferred, such as Figure 16 As shown, the isolation boss includes a support boss 171. Two support bosses 171 are provided between the two slides and the moving contact receiving groove 14. The two support bosses 171 form the two slides after the support seat 13 and the support cover 12 are installed, and the support bosses 171 isolate the moving contact receiving groove 14 from the slides.

[0130] Furthermore, the two support protrusions 171 can be disposed on the support base 13 or on the support cover 12; or the support protrusions 171 can be disposed on both the support base 13 and the support cover 12, with the support protrusions 171 on the support base 13 and the support protrusions 171 on the support cover 12 correspondingly disposed in the thickness direction of the moving contact 11. In this case, the support base 13 includes two support protrusions 171, and the support cover 12 includes two support protrusions 171.

[0131] Preferred, such as Figure 16 As shown, two arc-shaped support columns 15 are respectively disposed on the two support bosses 171, and two hot-melt columns 131 are respectively disposed on the two support bosses 171. After the support base 13 and the support cover 12 are installed, the two arc-shaped support columns 15 can partially extend out of the outer surface of the support cover 12. The bottom of the support base 13 is provided with two second arc-shaped grooves corresponding to the arc-shaped support columns 15. The extended parts of the two arc-shaped support columns 15 can be embedded in the second arc-shaped grooves for connection with the support base 13 of the rotary contact assembly 1 of the adjacent switch unit 100.

[0132] Preferably, in one possible embodiment, in order to form the clamping gap at both ends of the moving contact 11, the first contact 111 and the second contact 112 are bent structures. The first contact 111 is bent toward the second contact 112 from the middle of its side relative to the second contact 112, forming a first pressing portion in the middle of the first contact 111 and two first gap portions at both ends. And / or, the second contact 112 is bent toward the first contact 111 from the middle of its side relative to the first contact 111 to form a second pressing portion, and second gap portions are formed at both ends of the second contact 112, so that the first pressing portion and the second pressing portion of the first contact 111 and the second contact 112 abut against each other, and the clamping gap is formed at both ends of the first contact 111 and the second contact 112. Preferably, the first pressing portion and the first gap portions at both ends are parallel, and the second pressing portion and the second gap portions at both ends are parallel.

[0133] Alternatively, in another possible embodiment, both the first contact 111 and the second contact 112 are flat plate structures, and at least one boss is provided between the first contact 111 and the second contact 112, wherein at least one of the bosses makes the first contact 111 and the second contact 112 arranged in parallel, forming the clamping gap at both ends of the moving contact 11.

[0134] Preferred, such as Figures 17-19 As shown, the first contact 111 and the second contact 112 have arc-shaped protrusions 16 on their sides. The arc-shaped protrusions 16 of the first contact 111 and the arc-shaped protrusions 16 of the second contact 112 are arranged opposite to each other and the distance between them is greater than the distance of the clamping gap between the first contact 111 and the second contact 112.

[0135] By providing arc-shaped protrusions 16 at the ends of the first contact 111 and the second contact 112, their opening angle can be greater than the distance of the clamping gap between the first contact 111 and the second contact 112, which makes it easier for the moving contact 11 to be inserted with the first stationary contact and the second stationary contact 2.

[0136] Furthermore, both sides of the first contact 111 and the second contact 112 are provided with arc-shaped protrusions 16, or, as shown in the embodiments of this application, one side of the first contact 111 and the second contact 112 is provided with an arc-shaped protrusion 16. It follows the rotation direction of the moving contact 11 and is inserted and connected with the first stationary contact and the second stationary contact 2. When the moving contact 11 rotates clockwise or counterclockwise to be inserted and connected with the first stationary contact and the second stationary contact 2, the arc-shaped protrusion 16 is provided on one side of the first contact 111 and the second contact 112. The moving contact 11 can be connected with the first stationary contact and the second stationary contact 2 by rotating clockwise or counterclockwise. At this time, the arc-shaped protrusion 16 is respectively provided on both sides of the first contact 111 and the second contact 112, satisfying the condition that it can be connected with the first stationary contact and the second stationary contact 2 by rotating clockwise or counterclockwise.

[0137] Of course, in some inferior embodiments, the arc-shaped protrusion 16 may not be arranged opposite to each other. It may only be arranged on one side, for example, only on the first contact 111 or the second contact 112, which can save production costs. It can be seen that the connection relationship between the arc-shaped protrusion 16 and the moving contact 11 can have various embodiments. All those that can be conceived by those skilled in the art in combination with the prior art are within the protection scope of this application. In addition, the arc-shaped protrusion 16 may not be an absolutely arc-shaped structure. As long as it is convenient to be inserted with the first stationary contact and the second stationary contact 2 to achieve the same technical effect, it is within the protection scope of this application and will not be elaborated further.

[0138] Preferably, the support base 13 and the support cover 12 are made of insulating gas-generating material. When the moving contact 11 contacts or separates from the first stationary contact and the second stationary contact 2, an electric arc is generated. Under the high-temperature erosion of the electric arc, the support base 13 and the support cover 12 generate gas to cool the arc. Simultaneously, the generated gas propels the arc towards the arc-extinguishing chamber, thereby accelerating arc extinguishing.

[0139] Preferred, such as Figure 14 As shown, the disconnecting switch also includes a first upper partition 51 and a first lower partition 52 arranged opposite to each other along the thickness direction of the switch unit 100. The rotary contact assembly 1 and the two arc-extinguishing grid plate groups 3 are disposed between the first upper partition 51 and the first lower partition 52. In a preferred embodiment, the first upper partition 51 and the first lower partition 52 of the first switch unit 101 each include a first abutment 53 and a second abutment 54 arranged at relative intervals. The first abutment 53 and the second abutment 54 respectively abut against the two arc-extinguishing grid plate groups 3, fixing the two arc-extinguishing grid plate groups 3 in the housing.

[0140] A first upper partition 51 and a first lower partition 52 are provided in the switching unit 100. The rotating contact assembly 1 and the two arc-extinguishing grid plate groups 3 are arranged between the first upper partition 51 and the first lower partition 52. The first upper partition 51 and the first lower partition 52 can clamp and fix the rotating contact assembly 1 and the two arc-extinguishing grid plate groups 3 along the thickness direction of the first switching unit 101 to form an integral arc-extinguishing space, improve the arc-extinguishing performance, and enable arc extinguishing with higher current carrying capacity.

[0141] Furthermore, the first support platform 53 and the second support platform 54 have two arc-shaped protrusions 531 extending towards the support cover 12 on the side near the rotation axis. The arc-shaped protrusions 531 can hold magnetic materials to achieve magnetic blowout arc extinguishing and enhance the arc extinguishing effect. A contact assembly receiving groove 55 is provided in the middle of the first upper partition plate 51 and the first lower partition plate 52, between the two arc-shaped protrusions 531. The rotating contact assembly 1 is disposed in the contact assembly receiving groove 55. A first through hole 56 is provided in the middle of the contact assembly receiving groove 55. A linkage mechanism is provided protruding from the upper part of the support cover 12. The linkage mechanism passes through the first through hole 56.

[0142] The first support platform 53, the second support platform 54, the contact assembly receiving groove 55, the arc-shaped boss 531, and the magnets provided on the first upper partition 51 and the first lower partition 52 greatly improve the arc extinguishing performance.

[0143] Furthermore, the first upper partition 51 and the first lower partition 52 are made of insulating gas-generating material. When the moving contact 11 contacts or separates from the first stationary contact and the second stationary contact 2, an electric arc is generated. The gas generated by the first upper partition 51 and the first lower partition 52 under the high-temperature erosion of the electric arc can cool the arc. Simultaneously, the generated gas also propels the arc towards the arc-extinguishing chamber, thereby accelerating arc extinguishing.

[0144] Preferably, the two arc-extinguishing grid groups 3 are arc-shaped, and after being connected with the first stationary contact and the second stationary contact 2, they can form a closed circle. The rotating contact assembly 1 is located at the center of the circle. Because the rotating contact assembly 1 is rotated, during the contact and separation process between the moving contact 11 and the first stationary contact and the second stationary contact 2, the movement trajectory of the moving contact 11 is arc-shaped, and the arc following the movement trajectory of the moving contact 11 is also approximately arc-shaped. The arc shape of the two arc-extinguishing grid groups 3 can reduce the resistance of the arc movement, which is more conducive to the arc smoothly entering the two arc-extinguishing grid groups 3, thus achieving a better arc extinguishing effect.

[0145] Preferably, the support base 13 and the support cover 12 are circular with the same diameter, and the first upper partition 51 and the first lower partition 52 are also circular with the same diameter. When the disconnecting switch includes multiple switch units 100 stacked together, the first upper partition 51 and the first lower partition 52 are respectively installed on the housings of two adjacent switch units 100.

[0146] Preferably, the arc-extinguishing grid assembly 3 includes two insulating side plates 31 and multiple stacked arc-extinguishing grids 32. The arc-extinguishing grid 32 has an opening structure in the middle, and two grid legs are formed on both sides of the opening structure. Adjacent arc-extinguishing grids 32 are arranged alternately; that is, one arc-extinguishing grid 32 is installed facing forward, and another arc-extinguishing grid 32 is rotated 180 degrees and installed in the opposite direction, so that the inclination direction of the inner side of the adjacent arc-extinguishing grids 32 is opposite. The staggered arrangement between the inclined surfaces of the adjacent arc-extinguishing grids 32 will form an inwardly concave chamfer in the middle of the two arc-extinguishing grid assemblies 3. The formed chamfer is more conducive to lengthening the arc to achieve a better arc extinguishing effect. Multiple arc-extinguishing grid plates 32 are radially mounted on two insulating side plates 31. Adjacent arc-extinguishing grid plates 32 have a fixed included angle, which is an acute angle. By stacking multiple arc-extinguishing grid plates 32 radially, the movement trajectory of the moving contact 11 can be matched. During the contact and separation process between the moving contact 11 and the first stationary contact and the second stationary contact 2, the movement trajectory of the moving contact 11 is arc-shaped, and the arc following the movement trajectory of the moving contact 11 is also approximately arc-shaped. Stacking multiple arc-extinguishing grid plates 32 radially can reduce the resistance to the movement of the arc, which is more conducive to the arc smoothly entering the two arc-extinguishing grid plate groups 3, thus achieving a better arc extinguishing effect.

[0147] Furthermore, such as Figure 2As shown, the housing of the switch unit 100 is provided with mounting holes 61, and the mounting holes 61 of the multiple switch units 100 stacked are one-to-one. The multiple switch units 100 also include mounting shafts passing through the mounting holes 61. The multiple switch units 100 are fixedly installed through the mounting holes 61 and the mounting shafts. Mounting brackets 62 are provided on both sides of the disconnect switch, and the disconnect switch is assembled through the mounting brackets 62 on both sides.

[0148] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0149] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A disconnecting switch, comprising stacked operating devices (105) and multiple switching units (100), characterized in that: The operating device (105) includes a housing (106), an operating mechanism (104) disposed within the housing (106), and at least two trip units, the at least two trip units including a first trip unit (910) and a second trip unit (920). The first trip unit (910) is at least used to drive the operating mechanism (104) to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the input terminal of the switching device to which the operating device (105) belongs; The second trip unit (920) is at least used to drive the operating mechanism (104) to trip when a current and / or voltage fault occurs in the circuit network electrically connected to the output terminal of the switching device to which the operating device (105) belongs; The plurality of switching units (100) includes at least one first switching unit (101) and a plurality of second switching units (102), wherein the current carrying capacity of the first switching unit (101) is greater than that of the second switching unit (102).

2. The disconnecting switch according to claim 1, characterized in that: The second trip unit (920) is a condition trip unit. The reset operation of the condition trip unit and the re-trip operation of the operating mechanism (104) are independent of each other. After the operating mechanism (104) is driven by the condition trip unit to trip, the external force drives the condition trip unit to reset from the trip unit action state to the trip unit reset state before the operating mechanism (104) is allowed to trip again.

3. The disconnecting switch according to claim 2, characterized in that: The conditional trip unit includes a trip lever (924) for driving the operating mechanism (104) to trip, and the trip lever (924) includes a reset button; when the conditional trip unit is in the trip unit's operating state, one end of the reset button protrudes outside the device housing (106), and the trip lever (924) and the re-fastener (670) are in a limiting cooperation to keep the re-fastener (670) in the re-fastener (670) tripped position.

4. The disconnecting switch according to claim 1, characterized in that: Of the at least two trip units, one trip unit is a conditional trip unit, and the rest are general trip units; the reset operation of the conditional trip unit and the re-trip operation of the operating mechanism (104) are independent of each other; after the operating mechanism (104) is tripped by the conditional trip unit, the conditional trip unit is reset from the trip unit action state to the trip unit reset state by external force before the operating mechanism (104) is allowed to re-trip; when the operating mechanism (104) re-trips from the tripped state, the general trip unit is driven to reset from the trip unit action state to the trip unit reset state.

5. The disconnecting switch according to claim 2, characterized in that: The operating mechanism (104) includes a jump fastener (610), a locking fastener (660) and a re-fastener (670) that are rotatably arranged respectively. The re-fastener (670) and the locking fastener (660) establish a first limiting engagement so that the locking fastener (660) and the jump fastener (610) maintain a snap-fit ​​engagement. The conditional trip unit drives the re-fastener (670) to rotate and release the first limit engagement with the locking fastener (660), thereby releasing the latching engagement between the locking fastener (660) and the trip fastener (610), and switching the operating mechanism (104) from the closed state to the tripped state. When the trip unit is in the activated state, the conditional trip unit keeps the re-fastener (670) in the tripped position, so that the operating mechanism (104) cannot be latched again.

6. The disconnecting switch according to claim 5, characterized in that: The length, width, and height directions of the operating mechanism (104) are directions d1, d2, and d3, respectively; the operating mechanism (104) includes a bracket (200), and the jump fastener (610), locking fastener (660), and re-fastener (670) are rotatably mounted on the bracket (200) with their rotation axes parallel to direction d3; the jump fastener (610), locking fastener (660), and re-fastener (670) are arranged sequentially along direction d2; The first trip unit (910) and the operating mechanism (104) are arranged side by side along direction d3. The first trip unit (910) and the re-fastener (670) are arranged sequentially along direction d3. The second trip unit (920) and the operating mechanism (104) are arranged side by side along direction d1. The second trip unit (670) and the re-fastener (670) are arranged sequentially along direction d1. The first trip unit (910) is located on the same side of the re-fastener (670) and the second trip unit (920) in direction d3. On the projection of the operating device (105) perpendicular to direction d3, the second trip unit (920) is located on the same side of the operating mechanism (104) and the first trip unit (910).

7. The disconnecting switch according to claim 6, characterized in that: The operating mechanism (104) further includes an operating shaft (300) and a rocker arm (500) respectively rotatably mounted on the bracket (200) with their rotation axes parallel to direction d3, a linkage structure (400), a front link (620), a rear link (630), a main spring (700), and a driving component (640) with its rotation axis parallel to direction d3 and used for transmission connection with the rotating contact assembly (1) of the switching device; the operating shaft (300) is transmissionally connected to the rocker arm (500) through the linkage structure (400), and one end of the jump fastener (610) is rotatably mounted on the bracket (200) through the jump fastener shaft (691), and the other end is... The end is engaged with the locking fastener (660). The two ends of the front connecting rod (620) are respectively connected to the middle of the jump fastener (610) and one end of the rear connecting rod (630) through the front connecting shaft (692) and the rear connecting shaft (693). The other end of the rear connecting rod (630) is rotatably connected to the driving member (640). The two ends of the main spring (700) are respectively connected to the rear connecting shaft (693) and the rocker arm (500). The rocker arm (500) and the driving member (640) are located at the two ends of the operating mechanism (104) in the direction d1. The fastener (670) and the jump fastener shaft (691) are located at the two ends of the operating mechanism (104) in the direction d2.

8. The disconnecting switch according to claim 1, characterized in that: The switching unit (100) includes a housing and two first stationary contacts and two second stationary contacts (2) and a rotating contact assembly (1) installed inside the housing. Two arc-extinguishing grid groups (3) are provided on both sides of the rotating contact assembly (1). The two first stationary contacts and the second stationary contacts (2) are spaced apart on both sides of the rotating contact assembly (1). The first stationary contacts and the second stationary contacts (2) and the arc-extinguishing grid groups (3) are arranged crosswise. The first stationary contact and / or the second stationary contact (2) of the first switching unit (101) includes an integrally formed first contact portion (21), a first connecting portion (22) and at least two first wiring portions (23) connected in sequence. The first contact portion (21) cooperates with the moving contact (11) of the rotating contact assembly (1). At least two first wiring portions (23) extend to the outside of the housing for electrical connection with the outside.

9. The disconnecting switch according to claim 8, characterized in that: The first stationary contact and the second stationary contact (2) include two parallel first wiring portions (23), which are perpendicular to the first connecting portion (22). One end of the first connecting portion (22) is connected to the first contact portion (21). The first contact portion (21) includes a first overlapping portion (212) and a first extension portion (213). The first extension portion (213) is rectangular, and the length of the first extension portion (213) is greater than or equal to the distance between the two first wiring portions (23). An angle is formed between the first extension portion (213) and the first connecting portion (22). The angle is recessed towards the first connecting portion (22) to form a limiting groove (24) for limiting cooperation with the arc extinguishing grid plate group (3).

10. The disconnecting switch according to claim 1, characterized in that: The switching unit (100) includes a housing and two first stationary contacts and two second stationary contacts (2) and a rotating contact assembly (1) disposed within the housing. The rotating contact assembly (1) includes a support cover (12), a moving contact (11) and a support base (13) stacked together. The support base (13) and support cover (12) of the plurality of second switching units (102) are provided with a second through hole (71). At least one drive shaft (7) passes through the second through hole (71) and is linked with the rotating contact assembly (1) of the plurality of second switching units (102). The drive shaft (7) is directly or indirectly connected to the operating mechanism (104).

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