Disconnector and generator system for generator starting circuit

Abstract

The present application relates to an isolating switch and a generator system for a generator starting circuit, the isolating switch comprising: a conductive housing; a static contact member, arranged at one end in the conductive housing, the contact member comprising a static arc contact; and a dynamic contact member, arranged opposite to the static contact member and located at the other end in the conductive housing, the dynamic contact member comprising a transmission member and a dynamic arc contact, one end of the transmission member is used to receive external power, and the other end is provided with a dynamic contact, the transmission member can move in a first direction relative to the conductive housing under the action of external power, and can drive the dynamic arc contact to contact the static arc contact. The present application separately sets the dynamic arc contact and the static arc contact to conduct the closing current during the closing process, and after closing, it can withstand the impact of the short-term withstand current of 160kA / 3s and the peak withstand current of 450kA that may be generated, until the closing is fully completed, and the external power supply will drive the generator to start quickly.

Description

Technical Field

[0001] The present application relates to the field of switch technology, and in particular to an isolating switch and a generator system for a generator starting circuit. Background Art

[0002] In the context of energy structure transformation and green and low-carbon development, pumped storage power stations have ushered in new development opportunities due to their unique role in the power system. Pumped storage power stations effectively balance the load of the power grid and improve energy efficiency by storing energy when power demand is low and generating electricity during peak hours. In such power stations, the disconnectors of the starting circuit in the generator output switch play a vital role. They are not only used to achieve rapid starting of the generator and opening and closing starting current, but also must withstand frequent start-stop operations, requiring a mechanical life of more than 20,000 times to ensure long-term stable operation.

[0003] With the advancement of technology and the increase in market demand, various companies have begun to develop related technologies in this field. Isolating switches are one of the important high-voltage electrical equipment that are indispensable in substations. They switch the knife switch under no-load conditions and make obvious disconnection points between the equipment under maintenance and the live equipment to achieve the purpose of electrical isolation. Isolating switches are generally three-phase linkage type, with an asynchronous motor as the power source. The torque is transmitted to the main shaft through a reduction device composed of mechanical gears, and then the connecting steel parts drive the support porcelain bottle to rotate to realize the closing (opening) process of the isolating switch. However, the isolating switch is exposed to harsh environments such as outdoor sun and rain or indoor high temperature for a long time, especially in coastal areas, where the air contains a lot of salt spray. With the extension of operating time, rust and other phenomena occur in the rotating parts and transmission parts, which will lead to an increase in operating torque and a decrease in the strength of mechanical transmission parts, causing the isolating switch to close (open) in place, which will further cause serious accidents such as increased resistance of the conductive circuit, overheating of the equipment, damage and deformation of the transmission mechanism, etc., reducing the reliability of power supply and increasing the workload and operation time of the staff. After the isolating switch receives a remote or local opening (closing) command, the switch contacts of the opening (closing) control circuit are closed, and the motor is energized to realize the opening (closing) action of the isolating switch. However, the isolating switch in the related technology has a complex mechanical structure and a complex and inefficient transmission process, which will cause a delay in opening (closing) and cause the starting circuit to start untimely. Summary of the invention

[0004] Based on this, it is necessary to provide an isolating switch and a generator system for a generator starting circuit that have a simple structure and can withstand the rated short-time withstand current and the rated peak withstand current in order to solve the above technical problems.

[0005] On the one hand, an isolating switch for a generator starting circuit is provided, which is used for conducting the generator starting circuit, and the isolating switch comprises:

[0006] Conductive housing;

[0007] a static contact member, disposed at one end of the conductive housing, wherein the contact member comprises a static arc contact; and

[0008] A moving contact member is arranged opposite to the static contact member and is located at the other end of the conductive shell. The moving contact member includes a transmission member and a moving arc contact. One end of the transmission member is used to receive external power, and the other end is provided with a moving contact. The transmission member can move along a first direction relative to the conductive shell under the action of external power, and can drive the moving arc contact to contact the static arc contact.

[0009] In one embodiment, the moving contact member includes a conductive cylinder, which is arranged around the outside of the transmission member and moves along the first direction with the transmission member. The static contact member includes a guide frame, and when the moving arc contact contacts the static arc contact, the guide frame is connected to the conductive cylinder.

[0010] In one embodiment, the isolating switch further includes a first contact finger and a second contact finger, the first contact finger and the second contact finger are arranged in a conductive housing at intervals, and the conductive cylinder moves along the first direction and can connect the first contact finger and the second contact finger.

[0011] In one of the embodiments, the static contact member further includes an outlet terminal disposed through the conductive housing, and the outlet terminal is used to connect to an external device.

[0012] In one embodiment, the isolating switch further comprises a shorting piece, and the shorting piece is located at one end of the conductive housing where the moving contact member is located, and after the moving arc contact is separated from the static arc contact, the moving contact member can be connected to the shorting piece.

[0013] In one of the embodiments, the isolating switch comprises a fixing cylinder, the fixing cylinder is arranged around the transmission member and the outer side of the moving arc contact, and the shorting piece is arranged in the fixing cylinder.

[0014] In one embodiment, the isolating switch further comprises an insulating cylinder, wherein the insulating cylinder is disposed in the conductive housing, and both ends of the insulating cylinder are respectively used for passing and installing a static contact member and a dynamic contact member, and the transmission member can move relative to the insulating cylinder.

[0015] In one embodiment, the dynamic contact member includes a conductive cylinder, which is arranged around the outside of the transmission member and moves along the first direction with the transmission member. The disconnector also includes a mounting sleeve arranged between the insulating cylinder and the conductive cylinder, and the conductive cylinder can move relative to the mounting sleeve.

[0016] In one of the embodiments, the isolating switch further comprises a main conductive circuit disposed on one side of the conductive housing and an insulating support seat disposed on the bottom of the conductive housing.

[0017] On the one hand, a generator system is provided, which adopts the above-mentioned isolating switch for the generator starting circuit, and the output terminal of the isolating switch is used to connect an external generator, or the output terminal of the isolating switch is used to connect a static frequency converter.

[0018] The above-mentioned disconnector adopts a structure in which the arc contact and the main contact are separated, and the moving arc contact and the static arc contact are separately set to conduct the closing current during the closing process. After closing, it can withstand the impact of the short-term withstand current of 160kA / 3s and the peak withstand current of 450kA that may be generated until the switch is fully closed. The external power supply will drive the generator to start quickly; when the switch is closed, the arc contact bears the electrical wear of closing, and when the switch is opened, the arc contact bears the strong arc when the circuit is disconnected, which plays a role in protecting the main contact; the power supply reliability is improved when the disconnector is not closed (opened) in place, and the workload and working time of the staff are reduced. The disconnector has a simple mechanical structure, a concise and efficient transmission process, and an accurate opening (closing) process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of a generator system in one embodiment of the present application.

[0020] Figure 2 Schematic diagram of the structure of an isolating switch in one embodiment of the present application.

[0021] Figure 3 It is a structural schematic diagram of the disconnecting switch in an embodiment of the present application in the open state.

[0022] Figure 4 It is a structural schematic diagram of the isolating switch in the closed state in one embodiment of the present application.

[0023] Description of Figure Numbers:

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

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0031] See also Figure 2-4 , Figure 2-4 The schematic diagram of the structure of the isolating switch 100 for the generator starting circuit in one embodiment of the present application is shown. The isolating switch 100 provided in one embodiment of the present application includes a conductive housing 101, a static contact member 110 and a dynamic contact member 120. Figure 1 An embodiment of the present application provides a generator system 10, which uses the above-mentioned isolating switch 100 for the generator starting circuit, and the output terminal 102 of the isolating switch 100 is used to connect an external generator, or the output terminal 102 of the isolating switch 100 is used to connect a static inverter.

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

[0033] The above-mentioned disconnector 100 adopts a structure in which the arc contact and the main contact are separated, and the moving arc contact 121 and the static arc contact 111 are separately provided to conduct the closing current during the closing process. After closing, it can withstand the impact of the short-term withstand current of 160kA / 3s and the peak withstand current of 450kA that may be generated until the switch is fully closed. The external power supply will drive the generator to achieve rapid start; when the switch is closed, the arc contact bears the electrical wear of closing, and when the switch is opened, the arc contact bears the strong arc when the circuit is disconnected, which plays a role in protecting the main contact; the power supply reliability when the disconnector 100 is not closed (opened) in place is improved, and the workload and working time of the staff are reduced. The disconnector 100 has a simple mechanical structure, a concise and efficient transmission process, and an accurate opening (closing) process.

[0034] In this embodiment, the generator is started in two ways: (1) If the output terminal 102 of the isolating switch 100 of the starting circuit is connected to a static frequency converter (SFC), the generator is started by the SFC static frequency converter; the static frequency converter is a non-rotating motor frequency converter with a certain power composed of semiconductor power elements, DC reactors and other equipment. It is an electric energy control device that uses the on-off function of a thyristor to convert the industrial frequency power supply into a variable frequency, and uses the frequency change function of the SFC to control the starting of the generator. (2) If the output terminal 102 of the isolating switch 100 of the starting circuit is connected to another generator, back-to-back drag start is achieved. Regardless of the starting method, the isolating switch 100 of the starting circuit needs to be in the closed state, that is, when the moving arc contact 121 contacts the static arc contact 111.

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

[0036] Specifically, the conductive housing 101 is made of conductive material, so that the conductive housing 101 has the current carrying capacity of the rated current and the short-circuit current. For example, the conductive housing 101 is made of metal and alloy material, and preferably, the conductive housing 101 is a rigid, self-supporting aluminum structure.

[0037] In order to facilitate the installation of the conductive shell 101, an insulating support seat 104 made of insulating material is provided at the bottom of the conductive shell 101. The insulating material can be: resin-based composite materials (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] A main conductive circuit 103 is provided on the circumference of the conductive housing 101. 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 peripheral side of the isolating break conductive housing 101, the main conductive circuit 103 is located between the isolating break and the insulating support seat 104. The isolating break is used for. Although the rated current of the isolating break is 4000A, it needs to withstand a short-time withstand current of 160kA / 3s and a peak withstand current of 450kA.

[0040] There are three isolating switches 100, which correspond to the three circuits of the three-phase generator respectively. The three-phase isolating conductive housing 101 is fixed on the steel structure support 200. One side of the steel structure support 200 is provided with an operating mechanism for operating the isolating switch 100, and the operating mechanism 300 is electrically connected to the isolating switch 100. Preferably, the operating mechanism 300 operates reliably within the range of 80-110% of the rated voltage. The operating mechanism 300 is an electric control structure, and the operating mechanism 300 can perform three-phase linkage operation, that is, one operation controls the three isolating switches 100 to start or close synchronously.

[0041] In one embodiment, the dynamic contact member 120 includes a conductive tube 123, which is arranged around the outside of the transmission member 122 and moves along the first direction with the transmission member 122. The static contact member 110 includes a guide frame 112. When the dynamic arc contact 121 contacts the static arc contact 111, the guide frame 112 is connected to the conductive tube 123.

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

[0043] Specifically, the guide frame 112 is an annular groove structure or a columnar structure, and is arranged on the periphery of the static arc contact 111. The annular groove-shaped guide frame 112 can be connected with the edge of the cylindrical conductive tube 123. When the moving arc contact 121 contacts the static arc contact 111, the edge of the conductive tube 123 is inserted into the guide frame 112 or sleeved on the outside of the guide frame 112, thereby realizing the relative stillness of the moving contact component 120 and the static contact component 110.

[0044] In one embodiment, the isolating switch 100 further includes a first contact finger 130 and a second contact finger 140 , which are spaced apart in the conductive housing 101 , and the conductive cylinder 123 moves along the first direction and can connect the first contact finger 130 and the second contact finger 140 .

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

[0046] The first contact finger 130 and the second contact finger 140 are arranged flush with the cylindrical surface where the outer surface of the conductive tube 123 is located. As the conductive tube 123 moves from the initial position along the first direction, the second contact finger 140 first contacts the conductive tube 123. When the moving arc contact 121 contacts or is about to contact the static arc contact 111, the first contact finger 130 contacts the conductive tube 123. At this time, the conductive tube 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 main contacts of the disconnector 100 and are used to withstand rated current in a closed state. When the moving arc contact 121 contacts the static arc contact 111 and the conductive tube 123 connects the first contact finger 130 and the second contact finger 140, the disconnector 100 is in a closed state, and otherwise it is in an open state.

[0048] The isolating switch 100 adopts a structure in which the main contact and the arc contact are separated to realize the switching function respectively, wherein the main contact bears the rated current in the closed state, and can withstand the rated short-time withstand current and the rated peak withstand current, and the arc contact is used to withstand the closing current during the closing process.

[0049] In one embodiment, the isolating switch 100 further includes an insulating cylinder 150 , which is disposed in the conductive housing 101 , and the two ends of the insulating cylinder 150 are respectively used to penetrate and install the static contact component 110 and the dynamic contact component 120 , and the transmission member 122 can move relative to the insulating cylinder 150 .

[0050] Specifically, the insulating cylinder 150 is made of insulating material, for example, 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 is a hollow cylindrical structure, and the insulating cylinder 150 is fixed in the conductive shell 101 along the first direction. One end of the insulating cylinder 150 is fixedly provided with a static arc contact 111, a guide frame 112, and a first contact finger 130 in sequence from the center to the edge, and the other 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 in sequence from the center to the edge, wherein the arc contact (transmission member 122) and the conductive cylinder 123 are movably connected to the insulating cylinder 150.

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

[0052] Specifically, the mounting sleeve 160 is disposed at one end of the insulating cylinder 150 away from the static contact member 110, the mounting sleeve 160 is sleeved outside the conductive cylinder 123 and fixed in the insulating cylinder 150, one end of the mounting sleeve 160 partially extends into the insulating cylinder 150, and the other end extends from 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, and the end of the second contact finger 140 for contact extends to the plane where the inner surface of the mounting sleeve 160 is located, so as to contact the conductive cylinder 123.

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

[0054] Specifically, in the disconnecting state of the disconnector 100, when the moving contact member 120 and the static contact member 110 are farthest apart (initial position), the conductive cylinder 123 can be connected to the shorting piece 171, and when the conductive cylinder 123 moves toward the static contact member 110 along the first direction, the conductive cylinder 123 can be separated from the shorting piece 171. The first contact finger 130 (static arc contact 111), the second contact finger 140 and the shorting piece 171 are sequentially arranged 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 suspended potential body after the disconnecting state, thereby threatening the safety of maintenance personnel. At this time, the start-up isolation circuit will be completely isolated, and its main conductive circuit 103 and the generator circuit breaker start to operate normally together.

[0055] In one embodiment, the isolating switch 100 includes a fixing cylinder 170 . The fixing cylinder 170 is disposed around the transmission member 122 and the outer side of the moving arc contact 121 . The shorting piece 171 is disposed inside the fixing cylinder 170 .

[0056] Specifically, the fixing tube 170 is arranged at one end of the mounting sleeve 160 extending from the insulating tube 150, one end of the fixing tube 170 butts against the mounting sleeve 160, and one end of the fixing tube 170 away from the mounting sleeve 160 is provided with a shorting piece 171. The fixing tube 170 is in a hollow cylindrical shape, and the inner cavity of the fixing tube 170 is connected with the inner cavity of the insulating tube 150 to form a channel for the conductive tube 123 to move.

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

[0058] Specifically, the outlet terminal 102 is disposed at one end of the insulating cylinder 150, connected to the static arc contact 111 of the static contact member 110 inwardly, and is disposed outwardly through the conductive housing 101. The outlet terminal 102 is used to connect to another generator or a SFC static frequency converter.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An isolating switch for a generator starting circuit, characterized in that: Used for conducting the generator starting circuit, the isolating switch comprises: Conductive housing; a static contact member, disposed at one end of the conductive housing, wherein the contact member comprises a static arc contact; and A moving contact member is arranged opposite to the static contact member and is located at the other end of the conductive shell. The moving contact member includes a transmission member and a moving arc contact. One end of the transmission member is used to receive external power, and the other end is provided with a moving contact. The transmission member can move along a first direction relative to the conductive shell under the action of external power, and can drive the moving arc contact to contact the static arc contact.

2. The isolating switch for the generator starting circuit according to claim 1, characterized in that: The moving contact member includes a conductive cylinder, which is arranged outside the transmission member and moves along the first direction with the transmission member. The static contact member includes a guide frame, and when the moving arc contact contacts the static arc contact, the guide frame is connected to the conductive cylinder.

3. The isolating switch for the generator starting circuit according to claim 2, characterized in that: The isolating switch further comprises a first contact finger and a second contact finger, wherein the first contact finger and the second contact finger are arranged in a conductive housing at intervals, and the conductive cylinder moves along the first direction and can synchronously connect the first contact finger and the second contact finger.

4. The isolating switch for a generator starting circuit according to claim 1, characterized in that: The static contact member further includes an outlet terminal disposed through the conductive housing, and the outlet terminal is used for connecting to an external device.

5. The isolating switch for a generator starting circuit according to claim 1, characterized in that: The isolating switch further comprises 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 static arc contact, the moving contact member can be connected to the shorting piece.

6. The isolating switch for a generator starting circuit according to claim 5, characterized in that: The isolating switch comprises a fixing cylinder, the fixing cylinder is arranged around the transmission member and the outer side of the moving arc contact, and the shorting piece is arranged in the fixing cylinder.

7. The isolating switch for a generator starting circuit according to any one of claims 1 to 6, characterized in that: The isolating switch further comprises an insulating cylinder, which is arranged in the conductive shell, and two ends of the insulating cylinder are respectively used for passing and installing a static contact component and a dynamic contact component, and the transmission member can move relative to the insulating cylinder.

8. The isolating switch for a generator starting circuit according to claim 7, characterized in that: The dynamic contact member includes a conductive cylinder, which is arranged around the outside of the transmission member and moves along the first direction with the transmission member. The disconnector also includes a mounting sleeve arranged between the insulating cylinder and the conductive cylinder, and the conductive cylinder can move relative to the mounting sleeve.

9. The isolating switch for a generator starting circuit according to any one of claims 1 to 6, characterized in that: The isolating switch also includes a main conductive circuit arranged on one side of the conductive shell and an insulating support seat arranged on the bottom of the conductive shell.

10. A generator system, using the isolating switch for a generator starting circuit according to any one of claims 1 to 9, wherein the output terminals of the isolating switch are used to connect an external generator, or the output terminals of the isolating switch are used to connect a static frequency converter.

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