Isolation switch for generator starting loop and generator system

Abstract

The utility model relates to an isolating switch for a generator starting loop and a generator system. The isolating switch comprises a conductive shell; the static contact component is arranged at one end in the conductive shell, and the static contact component comprises a static arc contact; the movable contact component is arranged opposite to the static contact component and located at the other end in the conductive shell, the movable contact component comprises a transmission part and a movable arc contact, one end of the transmission part is used for receiving external power, and the other end of the transmission part is provided with a movable contact; the transmission member can move along a first direction relative to the conductive housing under the action of external power, and can drive the moving arc contact to contact with the static arc contact. According to the utility model, the moving arc contact and the static arc contact are independently arranged to conduct the closing current in the closing process, the impact of the current with short-time tolerance of 160kA / 3s and peak tolerance of 450kA can be born after closing until the closing is to the end, and an external power supply drives the generator to realize quick start.

Description

Technical Field

[0001] This application relates to the field of switch technology, and in particular to disconnecting switches and generator systems for generator starting circuits. Background Technology

[0002] Against the backdrop of energy structure transformation and green, low-carbon development, pumped-storage hydroelectric power stations have ushered in new development opportunities due to their unique role in the power system. Pumped-storage hydroelectric power stations effectively balance grid load and improve energy utilization efficiency by storing energy during periods of low electricity demand and generating electricity during peak periods. In such power stations, the isolating switches in the starting circuit of the generator outlet switch play a crucial role. They are not only used to enable rapid generator startup and control the starting current, but also must withstand frequent start-stop operations, requiring a mechanical life of over 20,000 cycles to ensure long-term stable operation.

[0003] With technological advancements and increasing market demand, various enterprises have begun to research and develop related technologies in this field. Disconnect switches are one of the essential high-voltage electrical devices in substations, used for switching disconnectors under no-load conditions and providing a clear disconnect point between the equipment under maintenance and energized equipment to achieve electrical isolation. Disconnect switches are generally three-phase linked, powered by an asynchronous motor. A reduction gear system transmits torque to the main shaft, which in turn drives the porcelain insulators on the support pillars via connecting steel components, thus achieving the closing (opening) process of the disconnect switch. However, disconnect switches are exposed to harsh environments such as outdoor sun and rain or indoor high temperatures, especially in coastal areas with high salt spray content. With prolonged operation, corrosion occurs in rotating and transmission parts, leading to increased operating torque, decreased strength of mechanical transmission components, and incomplete closing (opening) of the disconnect switch. This can further cause serious accidents such as increased resistance in the conductive circuit, equipment overheating, and damage or deformation of the transmission mechanism, reducing power supply reliability and increasing the workload and working time of personnel. After receiving a remote or local trip (close) command, the disconnecting switch closes the switch contacts of the trip (close) control circuit, energizes the motor, and realizes the trip (close) action of the disconnecting switch. However, the mechanical structure of the disconnecting switch in related technologies is complex and the transmission process is complex and inefficient, which will lead to the trip (close) delay and the problem of the starting circuit not starting in time. Utility Model Content

[0004] Therefore, it is necessary to provide a simple disconnecting switch and generator system for generator starting circuits that can withstand rated short-time withstand current and rated peak withstand current, addressing the aforementioned technical problems.

[0005] On one hand, a disconnecting switch for a generator starting circuit is provided for connecting the generator starting circuit, the disconnecting switch comprising:

[0006] Conductive outer casing;

[0007] A static contact member, disposed at one end within the conductive housing, the contact member including a static arc contact; and

[0008] A moving contact component is disposed opposite to the stationary contact component and located at the other end inside the conductive housing. The moving contact component includes a transmission component and a moving arc contact. One end of the transmission component is used to receive external power, and the other end is provided with a moving contact. The transmission component can move relative to the conductive housing in a first direction under the action of external power, and can drive the moving arc contact to contact the stationary arc contact.

[0009] In one embodiment, the moving contact member includes a conductive cylinder surrounding the outside of the transmission member and moving along the first direction with the transmission member; the stationary contact member includes a guide frame, and when the moving arc contact contacts the stationary arc contact, the guide frame is connected to the conductive cylinder.

[0010] In one embodiment, the disconnect switch further includes a first contact finger and a second contact finger, the first contact finger and the second contact finger being disposed at intervals within the conductive housing, and the conductive cylinder moving along the first direction and capable of communicating with the first contact finger and the second contact finger.

[0011] In one embodiment, the static contact member further includes an output terminal disposed through the conductive housing for connecting to an external device.

[0012] In one embodiment, the disconnecting switch further includes a shorting piece located at one end of the conductive housing where the moving contact member is located. After the moving arc contact separates from the stationary arc contact, the moving contact member can be connected to the shorting piece.

[0013] In one embodiment, the disconnecting switch includes a fixed cylinder surrounding the transmission member and the moving arc contact, and the shorting piece is provided inside the fixed cylinder.

[0014] In one embodiment, the disconnecting switch further includes an insulating cylinder disposed within the conductive housing. The two ends of the insulating cylinder are respectively used to install a static contact member and a dynamic contact member, and the transmission member is capable of moving relative to the insulating cylinder.

[0015] In one embodiment, the moving contact member includes a conductive cylinder surrounding the outside of the transmission member and moving along the first direction with the transmission member. The disconnecting switch also includes a mounting sleeve disposed between the insulating cylinder and the conductive cylinder, the conductive cylinder being movable relative to the mounting sleeve.

[0016] In one embodiment, the disconnecting switch further includes a main conductive circuit disposed on one side of the conductive housing and an insulating support seat disposed at the bottom of the conductive housing.

[0017] On the one hand, a generator system is provided, which employs the aforementioned disconnecting switch for the generator starting circuit, wherein the outgoing terminals of the disconnecting switch are used to connect to an external generator, or the outgoing terminals of the disconnecting switch are used to connect to a static frequency converter.

[0018] The aforementioned disconnecting switch adopts a structure with separate arc contacts and main contacts. It features independently configured moving and stationary arc contacts to conduct the closing current during the closing process. After closing, it can withstand the impact of a short-term withstand current of 160kA / 3s and a peak withstand current of 450kA until the switch is fully closed. An external power source will then drive the generator for rapid startup. When the switch is closed, the arc contacts bear the electrical wear during closing; when the switch is opened, the arc contacts bear the strong arc during circuit interruption, thus protecting the main contacts. This improves the reliability of power supply when the disconnecting switch is not fully closed (opened), reduces the workload and working time of personnel, and features a simple mechanical structure, a concise and efficient transmission process, and accurate opening (closing) procedures. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the generator system in one embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of the disconnecting switch in one embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the disconnector switch in the open state according to one embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the closed state of the disconnecting switch in one embodiment of this application.

[0023] Explanation of icon numbers:

[0024] 10. Generator system; 100. Disconnecting switch; 101. Conductive housing; 102. Outgoing terminal; 103. Main conductive circuit; 104. Insulating support base; 110. Static contact component; 111. Static arc contact; 112. Guide frame; 120. Moving contact component; 121. Moving arc contact; 122. Transmission component; 123. Conductive cylinder; 130. First contact finger; 140. Second contact finger; 150. Insulating cylinder; 160. Mounting sleeve; 170. Fixing cylinder; 171. Shorting piece; 200. Steel structure bracket; 300. Operating mechanism. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] See Figure 2-4 , Figure 2-4 A schematic diagram of a disconnecting switch 100 for a generator starting circuit according to an embodiment of this application is shown. The disconnecting switch 100 provided in this embodiment includes a conductive housing 101, a static contact member 110, and a dynamic contact member 120. (See also...) Figure 1 One embodiment of this application provides a generator system 10, which uses the above-mentioned disconnecting switch 100 for generator starting circuit. The output terminal 102 of the disconnecting switch 100 is used to connect to an external generator, or the output terminal 102 of the disconnecting switch 100 is used to connect to a static frequency converter.

[0032] A stationary contact member 110 is disposed at one end within the conductive housing 101, and the stationary contact member includes a stationary arc contact 111. A moving contact member 120 is disposed opposite to the stationary contact member 110 and located at the other end within the conductive housing 101. The moving contact member 120 includes a transmission member 122 and a moving arc contact 121. One end of the transmission member 122 is used to receive external power, and the other end is provided with a moving contact. The transmission member 122 can move relative to the conductive housing 101 in a first direction under the action of external power, and can drive the moving arc contact 121 to contact the stationary arc contact 111.

[0033] The aforementioned disconnector 100 adopts a structure with separate arc contacts and main contacts. It is equipped with a separate moving arc contact 121 and a stationary arc contact 111 to conduct the closing current during the closing process. After closing, it can withstand the impact of a short-term withstand current of 160kA / 3s and a peak withstand current of 450kA until the circuit is fully closed. An external power supply will then drive the generator for rapid startup. When the switch is closed, the arc contact bears the electrical wear during closing; when the switch is opened, the arc contact bears the strong arc during circuit interruption, thus protecting the main contacts. This improves the power supply reliability when the disconnector 100 is not fully closed (opened), reduces the workload and working time of personnel, and features a simple mechanical structure, a concise and efficient transmission process, and accurate opening (closing) procedures.

[0034] In this embodiment, the generator is started in two ways: (1) If the output terminal 102 of the disconnecting switch 100 in the starting circuit is connected to a static frequency converter (SFC), the generator is started through the SFC. The static frequency converter is a non-rotating motor-type frequency converter with a certain power, composed of semiconductor power elements, DC reactors, and other devices. It is a power control device that uses the switching action of thyristors to convert power frequency power into variable frequency power. The generator is started by using the frequency changing function of the SFC. (2) If the output terminal 102 of the disconnecting switch 100 in the starting circuit is connected to another generator, the generator is started by back-to-back drive. Regardless of the starting method, the disconnecting switch 100 in the starting circuit must be in the closed state, that is, when the moving arc contact 121 contacts the stationary arc contact 111.

[0035] In one embodiment, the disconnect switch 100 further includes a main conductive circuit 103 disposed on one side of the conductive housing 101 and an insulating support base 104 disposed at the bottom of the conductive housing 101.

[0036] Specifically, the conductive housing 101 is made of a conductive material, enabling it to carry both rated current and short-circuit current. For example, the conductive housing 101 is made of metal or alloy, and preferably, it is a rigid, self-supporting aluminum structure.

[0037] To facilitate the installation of the conductive housing 101, the bottom of the conductive housing 101 is provided with an insulating support base 104 made of insulating material. The insulating material can be: resin-based composite material (carbon fiber, glass fiber, basalt fiber or aramid fiber, etc.), glass fiber material, structural ceramic material (high-purity alumina ceramic, silicon nitride ceramic), PPS (polyphenylene sulfide), etc.

[0038] The conductive housing 101 has a main conductive circuit 103 on its periphery. The main conductive circuit 103 is connected in series with the generator circuit breaker to withstand the rated current, short-time withstand current and peak withstand current output by the generator. For example, the rated current is 18000A, the short-time withstand current is 100kA / 3s and the peak withstand current is 300kA.

[0039] On the periphery of the conductive housing 101 of the isolation break, the main conductive circuit 103 is located between the isolation break and the insulating support 104. The isolation break is used for... Although the rated current of the isolation break is 4000A, it needs to withstand a short-time withstand current of 160kA / 3s and a peak withstand current of 450kA.

[0040] Three disconnect switches 100 are provided, each corresponding to one of the three circuits of the three-phase generator. The conductive housings 101 of the three-phase isolation switches are jointly fixed to a steel structure support 200. An operating mechanism 300 for operating the disconnect switches 100 is provided on one side of the steel structure support 200, and is electrically connected to the disconnect switches 100. Preferably, the operating mechanism 300 operates reliably within a voltage range of 80–110% of the rated voltage. The operating mechanism 300 is electrically controlled and can perform three-phase linkage operation, meaning that a single operation controls the synchronous start or stop of all three disconnect switches 100.

[0041] In one embodiment, the moving contact member 120 includes a conductive cylinder 123, which surrounds the outside of the transmission member 122 and moves along the first direction with the transmission member 122. The stationary contact member 110 includes a guide frame 112, and when the moving arc contact 121 contacts the stationary arc contact 111, the guide frame 112 is connected to the conductive cylinder 123.

[0042] Specifically, the conductive cylinder 123 is a hollow cylindrical structure made of conductive material. A fixing plate is provided in the middle of the conductive cylinder 123 to fix the transmission component 122. The transmission component 122 is fixed at the central axis of the conductive cylinder 123, and the transmission component 122 can drive the conductive cylinder 123 to move along the first direction, which is the direction parallel to the central axis of the conductive cylinder 123.

[0043] Specifically, the guide frame 112 is a ring groove structure or a column structure, located on the periphery of the stationary arc contact 111. The ring groove-shaped guide frame 112 can be connected to the edge of the cylindrical conductive cylinder 123. When the moving arc contact 121 contacts the stationary arc contact 111, the edge of the conductive cylinder 123 is inserted into the guide frame 112 or sleeved on the outside of the guide frame 112, so as to achieve relative stillness between the moving contact member 120 and the stationary contact member 110.

[0044] In one embodiment, the disconnect switch 100 further includes a first contact finger 130 and a second contact finger 140, the first contact finger 130 and the second contact finger 140 being disposed at intervals within the conductive housing 101, and the conductive cylinder 123 moving along the first direction and capable of communicating with the first contact finger 130 and the second contact finger 140.

[0045] Specifically, the first contact finger 130 is located near the stationary contact member 110 and is spaced apart from the guide frame 112. The second contact finger 140 is located away from the stationary contact member 110. When the moving contact member 120 is in the initial position away from the stationary contact member 110, the second contact finger 140 is located near the moving contact member 120.

[0046] The first contact finger 130 and the second contact finger 140 are flush with the cylindrical surface on the outer surface of the conductive cylinder 123. As the conductive cylinder 123 moves from the initial position along the first direction, the second contact finger 140 first contacts the conductive cylinder 123. When the moving arc contact 121 contacts or immediately contacts the stationary arc contact 111, the first contact finger 130 contacts the conductive cylinder 123. At this time, the conductive cylinder 123 connects the first contact finger 130 and the second contact finger 140.

[0047] The first contact finger 130 and the second contact finger 140 serve as the main contacts of the disconnecting switch 100. They are used to withstand the rated current when the switch is closed. The disconnecting switch 100 is in the closed state when the moving arc contact 121 contacts the stationary arc contact 111 and the conductive cylinder 123 is connected to the first contact finger 130 and the second contact finger 140. The other states are in the open state.

[0048] The disconnector switch 100 adopts a structure with separate main contacts and arc contacts, which respectively realize the switching function. The main contacts bear the rated current in the closed state and can withstand the rated short-time withstand current and the rated peak withstand current. The arc contacts bear the closing current during the closing process.

[0049] In one embodiment, the disconnect switch 100 further includes an insulating cylinder 150 disposed inside the conductive housing 101. The two ends of the insulating cylinder 150 are respectively used to install a static contact member 110 and a moving contact member 120. The transmission member 122 is capable of moving relative to the insulating cylinder 150.

[0050] Specifically, the insulating cylinder 150 is made of insulating material, such as ceramic insulation, polyethylene (PE), cross-linked polyethylene (XLPE), silicone rubber, acrylonitrile-butadiene-styrene copolymer (ABS), epoxy glass fiber winding, and polyimide. The insulating cylinder 150 has a hollow cylindrical structure and is fixed inside the conductive shell 101 along the first direction. One end of the insulating cylinder 150 is fixed with a static arc contact 111, a guide frame 112, and a first contact finger 130 arranged sequentially from the center to the edge. The opposite end of the insulating cylinder 150 is provided with a moving arc contact 121 (transmission member 122), a conductive cylinder 123, and a second contact finger 140 arranged sequentially from the center to the edge. The arc contact (transmission member 122) and the conductive cylinder 123 are movably connected to the insulating cylinder 150.

[0051] In one embodiment, the disconnect switch 100 further includes a mounting sleeve 160 disposed between the insulating cylinder 150 and the conductive cylinder 123, the conductive cylinder 123 being movable relative to the mounting sleeve 160.

[0052] Specifically, the mounting sleeve 160 is located at the end of the insulating cylinder 150 away from the static contact member 110. The mounting sleeve 160 is sleeved on the outside of the conductive cylinder 123 and fixed inside the insulating cylinder 150. One end of the mounting sleeve 160 extends into the insulating cylinder 150, and the other end extends out of the insulating cylinder 150. The end extending into the insulating cylinder 150 is provided with a second contact finger 140. Further, the second contact finger 140 is located between the insulating cylinder 150 and the mounting sleeve 160. The end of the second contact finger 140 used for contact extends to the plane of the inner surface of the mounting sleeve 160 to facilitate contact with the conductive cylinder 123.

[0053] In one embodiment, the disconnect switch 100 further includes a shorting piece 171 located at one end of the conductive housing 101 where the moving contact member 120 is located. After the moving arc contact 121 separates from the stationary arc contact 111, the moving contact member 120 can be connected to the shorting piece 171.

[0054] Specifically, in the open state of the disconnector switch 100, when the moving contact member 120 and the stationary contact member 110 are at their farthest distance (initial position), the conductive cylinder 123 can connect with the shorting piece 171. When the conductive cylinder 123 moves towards the stationary contact member 110 in the first direction, the conductive cylinder 123 can separate from the shorting piece 171. The first contact finger 130 (stationary arc contact 111), the second contact finger 140, and the shorting piece 171 are arranged sequentially at intervals in the first direction. When the conductive cylinder 123 is connected to the shorting piece 171, the conductive cylinder 123 and the main circuit become equipotential bodies, preventing the conductive cylinder 123 from becoming a floating potential body after the open state, thus posing a threat to the safety of maintenance personnel. At this time, the disconnection circuit will be completely isolated, and its main conductive circuit 103 and the generator circuit breaker will start normal operation together.

[0055] In one embodiment, the disconnect switch 100 includes a fixed cylinder 170, which surrounds the transmission member 122 and the moving arc contact 121, and the shorting piece 171 is provided inside the fixed cylinder 170.

[0056] Specifically, the fixing cylinder 170 is located at the end of the mounting sleeve 160 that extends from the insulating cylinder 150. One end of the fixing cylinder 170 is connected to the mounting sleeve 160, and the end of the fixing cylinder 170 away from the mounting sleeve 160 is provided with a shorting piece 171. The fixing cylinder 170 is a hollow cylinder, and the inner cavity of the fixing cylinder 170 is connected to the inner cavity of the insulating cylinder 150 to form a channel for the movement of the conductive cylinder 123.

[0057] In one embodiment, the static contact member 110 further includes an output terminal 102 disposed through the conductive housing 101, the output terminal being used to connect to an external device.

[0058] Specifically, the outgoing terminal 102 passes through one end of the insulating cylinder 150, connects inward to the static arc contact 111 of the static contact member 110, and extends outward through the conductive housing 101. The outgoing terminal 102 is used to connect to another generator or to an SFC static inverter.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A disconnecting switch for a generator starting circuit, characterized in that, The disconnecting switch is used to connect the generator starting circuit and includes: Conductive outer casing; A static contact member, disposed at one end within the conductive housing, the static contact member including a static arc contact; and A moving contact component is disposed opposite to the stationary contact component and located at the other end inside the conductive housing. The moving contact component includes a transmission component and a moving arc contact. One end of the transmission component is used to receive external power, and the other end is provided with a moving contact. The transmission component can move relative to the conductive housing in a first direction under the action of external power, and can drive the moving arc contact to contact the stationary arc contact.

2. The disconnecting switch for a generator starting circuit according to claim 1, characterized in that, The moving contact component includes a conductive cylinder, which surrounds the outside of the transmission component and moves along the first direction with the transmission component. The stationary contact component includes a guide frame, and when the moving arc contact contacts the stationary arc contact, the guide frame is connected to the conductive cylinder.

3. The disconnecting switch for a generator starting circuit according to claim 2, characterized in that, The disconnect switch further includes a first contact finger and a second contact finger, which are disposed at intervals within the conductive housing. The conductive cylinder moves along the first direction and can simultaneously connect the first contact finger and the second contact finger.

4. The disconnecting switch for a generator starting circuit according to claim 1, characterized in that, The static contact component also includes an output terminal disposed through the conductive housing, the output terminal being used to connect to an external device.

5. The disconnecting switch for a generator starting circuit according to claim 1, characterized in that, The disconnecting switch also includes a shorting piece, which is located at one end of the conductive housing where the moving contact member is located. After the moving arc contact is separated from the stationary arc contact, the moving contact member can be connected to the shorting piece.

6. The disconnecting switch for a generator starting circuit according to claim 5, characterized in that, The disconnect switch includes a fixed cylinder, which surrounds the transmission component and the moving arc contact, and the shorting piece is provided inside the fixed cylinder.

7. The disconnecting switch for a generator starting circuit according to any one of claims 1-6, characterized in that, The disconnecting switch also includes an insulating cylinder disposed inside the conductive housing. The two ends of the insulating cylinder are respectively used to install a static contact component and a dynamic contact component, and the transmission component is capable of moving relative to the insulating cylinder.

8. The disconnecting switch for a generator starting circuit according to claim 7, characterized in that, The moving contact component includes a conductive cylinder, which surrounds the outside of the transmission component and moves along the first direction with the transmission component. The disconnecting switch also includes a mounting sleeve disposed between the insulating cylinder and the conductive cylinder, and the conductive cylinder is movable relative to the mounting sleeve.

9. The disconnecting switch for a generator starting circuit according to any one of claims 1-6, characterized in that, The disconnecting switch also includes a main conductive circuit located on one side of the conductive housing and an insulating support base located at the bottom of the conductive housing.

10. A generator system employing the disconnecting switch for a generator starting circuit as described in any one of claims 1-9, wherein the outgoing terminals of the disconnecting switch are used to connect to an external generator, or the outgoing terminals of the disconnecting switch are used to connect to a static frequency converter.

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