Pluggable fully-shielded voltage sensor and novel fusion-type combined electric appliance

Abstract

The invention relates to the technical field of high-voltage electrics, in particular to a plug-in type full-shielding voltage sensor and a novel fusion type combined electric appliance comprising the plug-in type full-shielding voltage sensor. In the pluggable fully-shielded voltage sensor, one end of a sensor insulating shell is a sensor plug or is provided with a sensor slot, a sensor connecting conductor is arranged in the middle of the sensor plug and is electrically connected with a sensor transition conductor, and a sensor insulating core body wraps the sensor transition conductor and the sensor insulator; a group of capacitive screens are embedded in the sensor insulating core body, a plurality of capacitive screens on the inner side form an insulating capacitor C1, a plurality of capacitive screens outside the insulating capacitor C1 form a voltage dividing capacitor C2, and the two capacitors are connected in series to form a capacitive voltage divider; the sensor is convenient to install and high in safety; the novel fusion type combined electric appliance is compact in structure, good in insulativity and capable of saving installation space.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of December 15, 2020, an application number of 202011473934.9, and an application title of "New Type of Integrated Gas Insulated Switchgear and Substation". Technical Field

[0002] The present invention relates to the field of high-voltage electrical technologies, and specifically to a plug-in fully shielded voltage sensor and a new type of integrated gas insulated switchgear including the plug-in fully shielded voltage sensor. Background Art

[0003] Existing voltage sensors generally need to be sleeved on the conductor of the circuit to be detected, which is inconvenient for installation and disassembly; moreover, in order to meet the requirements of high-voltage sampling, an insulating structure needs to be separately provided to reduce the risk of electric shock or short circuit, resulting in a complex structure of the voltage sensor. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art, and provide a plug-in fully shielded voltage sensor with convenient installation and high safety; and also provide a new type of integrated gas insulated switchgear with a compact structure, good insulation performance, and space-saving installation.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A plug-in fully shielded voltage sensor includes a sensor connection assembly, a sensor transition conductor, a sensor insulator, a sensor insulating core, and a sensor flange;

[0007] The sensor connection assembly includes a sensor insulating shell and a sensor connection conductor. One end of the sensor insulating shell is a sensor plug or is provided with a sensor slot. The sensor connection conductor is arranged in the middle of the sensor plug. One end of the sensor transition conductor is electrically connected to the sensor connection conductor, and the other end is connected to one end of the sensor insulator. The sensor insulating core is wrapped outside the sensor transition conductor and the sensor insulator and is located inside the sensor insulating shell. The sensor flange is arranged at the other end of the sensor insulating shell and is connected to the other end of the sensor insulator;

[0008] A capacitor screen group is embedded in the sensor insulating core. The capacitor screen group includes a group of capacitor screens that are embedded in the sensor insulating core and are alternately arranged with insulating layers, with gradually increasing inner diameters and are sequentially sleeved. The capacitor screen group includes an insulating capacitor C1 composed of multiple inner capacitor screens, and multiple capacitor screens located outside the insulating capacitor C1 form a voltage-dividing capacitor C2. The insulating capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitive voltage divider.

[0009] Furthermore, the capacitor screens of the capacitor screen group are offset sequentially from the inside to the outside, from the sensor transition conductor towards the direction where the sensor flange is located.

[0010] Further, the pluggable fully shielded voltage sensor further includes a sensor capacitance voltage division lead wire, and the sensor capacitance voltage division lead wire is connected to the capacitance voltage divider.

[0011] Further, the pluggable fully shielded voltage sensor further includes two sensor capacitance voltage division lead wires. One sensor capacitance voltage division lead wire is connected to the outermost capacitance screen of the capacitance screen group for grounding, and the other sensor capacitance voltage division lead wire is connected to the capacitance screen at the connection of the insulating capacitor C1 and the voltage division capacitor C2.

[0012] Further, the voltage division capacitor C2 is composed of n5 capacitance screens, where n5 ≥ 2.

[0013] Further, the sensor insulating housing is in an L-shaped structure, including a sensor insulating housing cross arm and a sensor insulating housing vertical arm. One end of the sensor insulating housing cross arm is a sensor plug or is provided with a sensor slot, and the other end is bent and connected to one end of the sensor insulating housing vertical arm. The other end of the sensor insulating housing vertical arm is connected to the sensor flange member; the sensor transition conductor, the sensor insulator, and the sensor insulating core body are arranged in the middle of the sensor insulating housing vertical arm.

[0014] Further, one end of the sensor insulating housing cross arm is a sensor plug or is provided with a sensor slot, and the other end is also provided with a sensor slot.

[0015] A novel integrated combined electrical apparatus includes a first bushing, a first connector, a circuit breaker, a second connector, a second bushing, and a pluggable fully shielded voltage sensor; the first bushing includes a first conductor and a first insulating core body wrapped outside the first conductor. The two ends of the first bushing are respectively a first bushing inner end and a first bushing outer end, and the first bushing inner end is connected to the circuit breaker through the first connector; the second bushing includes a second conductor and a second insulating core body wrapped outside the second conductor. The two ends of the second bushing are respectively a second bushing inner end and a second bushing outer end, and the second bushing inner end is connected to the circuit breaker through the second connector; the circuit breaker includes a vacuum interrupter, a circuit breaker moving contact and a circuit breaker static contact arranged in the vacuum interrupter, a circuit breaker operating mechanism, an operating mechanism pull rod, and a circuit breaker insulating core body. The vacuum interrupter is located in the circuit breaker insulating core body, and the circuit breaker operating mechanism is drivingly connected to the circuit breaker moving contact through the operating mechanism pull rod; the first connector includes a first insulating housing respectively cooperating with the first insulating core body and the circuit breaker insulating core body; the second connector includes a second insulating housing respectively cooperating with the circuit breaker insulating core body and the second insulating core body; the circuit breaker static contact is electrically connected to one end of the first conductor through the first connector, and the circuit breaker moving contact is electrically connected to one end of the second conductor through the second connector;

[0016] The pluggable fully shielded voltage sensor is pluggably connected to the first connector.

[0017] Alternatively, the novel integrated combined electrical apparatus further includes a third connector. The outer end of the first bushing is connected to an incoming power cable or a bus through the third connector, and the plug-in type fully shielded voltage sensor is pluggably connected to the third connector.

[0018] Alternatively, the novel integrated combined electrical apparatus further includes a fourth connector. The outer end of the second bushing is connected to an outgoing power cable or a bus through the fourth connector, and the plug-in type fully shielded voltage sensor is pluggably connected to the third connector.

[0019] Furthermore, the first connector further includes a first connector conductor disposed in the first insulating housing and electrically connected to the first conductor at one end. The first insulating housing has a three-way structure, including a first insulating housing cross arm and a first insulating housing vertical arm. One end of the first insulating housing vertical arm is connected to the middle of the first insulating housing cross arm, the other end of the first insulating housing vertical arm is connected to one end of the circuit breaker insulating core body, one end of the first insulating housing cross arm is connected to one end of the first insulating core body, and the other end of the first insulating housing cross arm is provided with a first connector slot.

[0020] The third connector includes a third insulating housing and a third connector conductor disposed in the third insulating housing. Two ends of the first conductor are respectively electrically connected to the static contact of the circuit breaker and the third connector conductor. One end of the third insulating housing is sleeved outside the outer end of the first bushing. The third insulating housing has an L-shaped structure, including a third insulating housing cross arm and a third insulating housing vertical arm. One end of the third insulating housing cross arm is sleeved outside the outer end of the first bushing, the other end is provided with a third connector slot and is bent and connected to the third insulating housing vertical arm, and an external incoming power cable or bus is inserted into the third insulating housing vertical arm and electrically connected to the third connector conductor.

[0021] The fourth connector includes a fourth insulating housing and a fourth connector conductor disposed in the fourth insulating housing. Two ends of the second conductor are respectively electrically connected to the moving contact of the circuit breaker and the fourth connector conductor. One end of the fourth insulating housing is sleeved outside the outer end of the second bushing. The other end of the fourth insulating housing is provided with a fourth connector slot, and an external outgoing power cable or bus is inserted into the fourth connector slot and electrically connected to the fourth connector conductor.

[0022] The sensor plug of the plug-in type fully shielded voltage sensor is pluggably mated with the first connector slot or the third connector slot or the fourth connector slot.

[0023] Furthermore, the novel integrated combined electrical apparatus further includes a plug-in type fully shielded lightning arrester and a plug-in type fully shielded earthing switch. The plug-in type fully shielded lightning arrester, the plug-in type fully shielded earthing switch and the plug-in type fully shielded voltage sensor are pluggably mated with the first connector, the third connector and the fourth connector one-to-one.

[0024] The plug-and-play fully shielded voltage sensor of the present invention can be loaded and unloaded in a plug-and-play manner. The installation and disassembly operations are simple. The insulating core body of the sensor has a capacitive voltage divider, which can be used to output voltage signals and can play a role in voltage division and insulation. It not only realizes the function of voltage detection but also ensures electrical safety and simplifies the overall structure.

[0025] The novel integrated combined electrical apparatus of the present invention, its first bushing, first connector, circuit breaker, second connector, and second bushing all include their respective insulating structures, and the insulating structures are connected to each other. Compared with the existing air-insulated combined electrical apparatus and GIS combined electrical apparatus, there is no need to fill insulating gas, which significantly reduces the overall volume and is beneficial to improving the assembly efficiency. The novel integrated combined electrical apparatus can replace the existing GIS combined electrical apparatus and the existing switchgear, and it is a brand-new and pioneering combined electrical apparatus; the first connector, the third connector, and the fourth connector improve the convenience of function expansion of the combined electrical apparatus; and it is plug-connected to the plug-and-play fully shielded voltage sensor, with simple loading and unloading and high sampling safety. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the novel integrated combined electrical apparatus of the present invention;

[0027] Figure 2A is a schematic structural diagram of the first embodiment of the plug-and-play fully shielded lightning arrester of the present invention;

[0028] Figure 2B is a schematic structural diagram of the second embodiment of the plug-and-play fully shielded lightning arrester of the present invention;

[0029] Figure 3A is a schematic structural diagram of the first embodiment of the plug-and-play fully shielded earthing switch of the present invention;

[0030] Figure 3B is a schematic structural diagram of the second embodiment of the plug-and-play fully shielded earthing switch of the present invention;

[0031] Figure 4A is a schematic structural diagram of the first embodiment of the plug-and-play fully shielded voltage sensor of the present invention;

[0032] Figure 4B is a schematic structural diagram of the second embodiment of the plug-and-play fully shielded voltage sensor of the present invention;

[0033] Figure 5 is a schematic structural diagram of the mobile substation of the present invention;

[0034] Figure 6 is of the present invention Figure 5 amplified schematic structural diagram of part A;

[0035] Figure 7This is another embodiment of the connection between the second connector and the breaker support bushing. Detailed implementation mode

[0036] The following combines the Figures 1 - 4B embodiments given to further illustrate the detailed implementation mode of the novel integrated switchgear of the present invention. The novel integrated switchgear of the present invention is not limited to the description of the following embodiments.

[0037] The novel integrated switchgear of the present invention includes a first bushing 1, a first connector 1-2, a breaker 2, a second connector 2-3 and a second bushing 3; the first bushing 1 includes a first conductor 10 and a first insulating core 11 wrapped outside the first conductor 10. The two ends of the first bushing 1 are respectively a first bushing inner end and a first bushing outer end. The first bushing inner end is connected to the breaker 2 through the first connector 1-2; the second bushing 3 includes a second conductor 30 and a second insulating core 31 wrapped outside the second conductor 30. The two ends of the second bushing 3 are respectively a second bushing inner end and a second bushing outer end. The second bushing inner end is connected to the breaker 2 through the second connector 2-3; the breaker 2 includes a vacuum interrupter 20, a moving contact and a static contact arranged in the vacuum interrupter 20, a breaker operating mechanism 24, an operating mechanism pull rod 25 and a breaker insulating core 23. The vacuum interrupter 20 is located in the breaker insulating core 23. The breaker operating mechanism 24 is drivingly connected to the moving contact through the operating mechanism pull rod 25; the first connector 1-2 includes a first insulating shell 1-21 that cooperates with the first insulating core 11 and the breaker insulating core 23 respectively; the second connector 2-3 includes a second insulating shell 2-30 that cooperates with the breaker insulating core 23 and the second insulating core 31 respectively; the static contact is electrically connected to one end of the first conductor 10 through the first connector 1-2, and the moving contact is electrically connected to one end of the second conductor 30 through the second connector 2-3.

[0038] For the novel integrated switchgear of the present invention, the first bushing 1, the first connector 1-2, the breaker 2, the second connector 2-3 and the second bushing 3 all include their respective insulating structures, and the insulating structures are connected to each other. Compared with the existing air-insulated switchgear and GIS switchgear, there is no need to fill insulating gas, thus significantly reducing the overall volume and being beneficial to improving the assembly efficiency.

[0039] Preferably, as Figure 1As shown in the figure, the novel integrated combined electrical apparatus of the present invention further includes a third connector 5, a fourth connector 6, and at least one of a plug-in fully shielded lightning arrester 1a, a plug-in fully shielded earthing switch 2a, and a plug-in fully shielded voltage sensor 3a. The first bushing 1 is connected to the input cable through the third connector 5, and the second bushing 3 is connected to the output cable through the fourth connector 6. The first connector 1-2 and / or the third connector 5 and / or the fourth connector 6 can be plugged and unplugged with the plug-in fully shielded lightning arrester 1a and / or the plug-in fully shielded earthing switch 2a and / or the plug-in fully shielded voltage sensor 3a. For the novel integrated combined electrical apparatus of the present invention, the first connector 1-2, the third connector 5, and the fourth connector 6 improve the convenience of function expansion of the combined electrical apparatus.

[0040] The novel integrated combined electrical apparatus of the present invention will be further described below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0041] As Figure 1 As shown in the figure, the novel integrated combined electrical apparatus of the present invention includes a first bushing 1, a first connector 1-2, a circuit breaker 2, a second connector 2-3, and a second bushing 3; the first bushing 1 includes a first conductor 10 and a first insulating core 11 wrapped outside the first conductor 10. The two ends of the first bushing 1 are respectively a first inner end of the bushing and a first outer end of the bushing. The first inner end of the bushing is connected to the circuit breaker 2 through the first connector 1-2; the second bushing 3 includes a second conductor 30 and a second insulating core 31 wrapped outside the second conductor 30. The two ends of the second bushing 3 are respectively a second inner end of the bushing and a second outer end of the bushing. The second inner end of the bushing is connected to the circuit breaker 2 through the second connector 2-3; the circuit breaker 2 includes a vacuum interrupter 20, a moving contact and a static contact of the circuit breaker arranged inside the vacuum interrupter 20, a circuit breaker operating mechanism 24, an operating mechanism pull rod 25, and a circuit breaker insulating core 23. The vacuum interrupter 20 is located inside the circuit breaker insulating core 23. The circuit breaker insulating core 23 provides insulation protection for the vacuum interrupter 20. The circuit breaker operating mechanism 24 is drivingly connected to the moving contact of the circuit breaker through the operating mechanism pull rod 25; the first connector 1-2 includes a first insulating shell 1-21 that is respectively in insulating cooperation with the first insulating core 11 and the circuit breaker insulating core 23; the second connector 2-3 includes a second insulating shell 2-30 that is respectively in cooperation with the circuit breaker insulating core 23 and the second insulating core 31; the static contact of the circuit breaker is electrically connected to one end of the first conductor 10 through the first connector 1-2, and the moving contact of the circuit breaker is electrically connected to one end of the second conductor 30 through the second connector 2-3.

[0042] Preferably, as Figure 1As shown, the circuit breaker 2 further includes a moving contact conductor 21 and a static contact conductor 22. The moving contact conductor 21 and the static contact conductor 22 are located outside the vacuum arc extinguishing chamber 20. The static contact of the circuit breaker is electrically connected to one end of the first conductor 10 through the static contact conductor 22. The moving contact of the circuit breaker is electrically connected to the second conductor 30 through the moving contact conductor 21. The moving contact of the circuit breaker is also connected to the operating mechanism pull rod 25 through the moving contact conductor 21. Further, as Figure 1 shown, the static contact conductor 22, the static contact of the circuit breaker, the moving contact of the circuit breaker, the moving contact conductor 21, the operating mechanism pull rod 25 and the circuit breaker operating mechanism 24 are arranged in sequence from top to bottom. Further, as Figure 1 shown, the circuit breaker 2 further includes a circuit breaker support bushing 26. The circuit breaker support bushing 26 is arranged between the second connector 2-3 and the circuit breaker operating mechanism 24, and is connected to the housings of the second connector 2-3 and the circuit breaker operating mechanism 24 at both ends respectively. Further, as Figure 1 shown, the second conductor 30 is a flexible conductor, and one end thereof extends into the second insulating shell 2-30 and is electrically connected to the moving contact conductor 21. The circuit breaker support bushing 26 is an insulating component from high voltage to ground potential. In this embodiment, an insulating component cast with epoxy resin is adopted. Glass fiber materials can be embedded according to needs to increase rigidity, and insulating layers and capacitance screens arranged alternately can also be embedded in the insulating component.

[0043] Preferably, as Figure 1 shown, the first connector 1-2 further includes a first connector conductor 1-20 arranged in the first insulating shell 1-21 and electrically connected to one end of the first conductor 10; the first insulating shell 1-21 is a three-way joint for connecting to the plug-in full-shielding lightning arrester 1a or the plug-in full-shielding earthing switch 2a or the plug-in full-shielding voltage sensor 3a. Of course, when it is not connected to the plug-in full-shielding lightning arrester 1a or the plug-in full-shielding earthing switch 2a or the plug-in full-shielding voltage sensor 3a, it can also be a straight or L-shaped two-way joint. The first insulating shell 1-21 includes a first insulating shell cross arm and a first insulating shell vertical arm. One end of the first insulating shell vertical arm is connected to the middle of the first insulating shell cross arm, and the other end of the first insulating shell vertical arm is connected to one end of the circuit breaker insulating core 23 and sleeved outside one end of the circuit breaker insulating core 23. One end of the first insulating shell cross arm is connected to one end of the first insulating core 11. Further, the other end of the first insulating shell vertical arm is sleeved outside one end of the circuit breaker insulating core 23, and one end of the first insulating shell cross arm is sleeved outside one end of the first insulating core 11. Further, as Figure 1 shown, a first connector slot 1-22 is provided at the other end of the first insulating shell cross arm. One end of the plug-in full-shielding lightning arrester 1a or the plug-in full-shielding earthing switch 2a or the plug-in full-shielding voltage sensor 3a is inserted into the first connector slot 1-22 and electrically connected to the other end of the first connector conductor 1-20.

[0044] Preferably, the first insulating housing 1-21 includes a prefabricated rubber insulating layer, an epoxy resin insulating member disposed within the prefabricated rubber insulating layer, an outer semiconductive layer disposed outside the prefabricated rubber insulating layer, and an inner semiconductive layer disposed inside the epoxy resin insulating member. The epoxy resin insulating member is provided corresponding to the first connector conductor 1-20 for covering the first connector conductor 1-20 and forming a first connector slot 1-22. The inner semiconductive layer is in contact with the first connector conductor 1-20, and the outer semiconductive layer is used for grounding. In this embodiment, the outer semiconductive layer and the inner semiconductive layer are made of conductive rubber, and the prefabricated rubber insulating layer is made of silicone rubber, which is convenient for sleeving on the first insulating core 11 and the circuit breaker insulating core 23 at both ends.

[0045] Preferably, as Figure 1 shown, the second insulating housing 2-30 is a tee-shaped structure, including a second insulating housing vertical arm and a second insulating housing horizontal arm. One end of the second insulating housing horizontal arm is connected to the middle of the second insulating housing vertical arm; the second connector 2-3 further includes a second connector T-shaped hole 2-31 disposed therein. The second connector T-shaped hole 2-31 includes a second connector vertical hole disposed in the second insulating housing vertical arm and a second connector horizontal hole disposed in the second insulating housing horizontal arm. One end of the second connector horizontal hole communicates with the middle of the second connector vertical hole; the moving contact conductor 21 and the operating mechanism pull rod 25 of the circuit breaker 2 pass through the second connector vertical hole, and one end of the second conductor 30 passes through the second connector horizontal hole and is electrically connected to the moving contact conductor 21. Preferably, as Figure 1 shown, the second insulating housing vertical arm and the second insulating housing horizontal arm are integrally formed. Both ends of the second insulating housing vertical arm are tapered protrusions, which are respectively inserted into the circuit breaker insulating core 23 and the circuit breaker support bushing 26. One end of the second insulating housing horizontal arm is a tapered protrusion, which is inserted into the second insulating core 31. The second insulating housing 2-30 of this embodiment is a cast epoxy resin tee joint. This embodiment is an internal tee (the connection part is a tapered protrusion). Of course, an external tee (the connection part is a tapered groove, see Figure 7 ). Insulating glue is filled at the connection between the circuit breaker insulating core 23 and the second insulating housing 2-30, the connection between the second insulating housing 2-30 and the circuit breaker support bushing 26, and the connection between the second insulating housing 2-30 and the second insulating core 31 to improve the sealing performance. According to needs, insulating glue can also be filled between the vacuum interrupter 20 and the circuit breaker insulating core 23, but this is not necessary. See Figure 7, Another embodiment in which the second connector 2-3 is connected to the breaker support bushing 26. The second insulating housing 2-30 is a cast epoxy resin three-way joint, an external three-way joint, with a tapered groove at the connection. The connection of the breaker support bushing 26 connected to the second insulating housing 2-30 is a tapered protrusion. Insulating glue is filled between the two. And the second connector 2-3 and the breaker support bushing 26 are fixedly connected by a flange. Preferably, the breaker support bushing 26 includes a group of capacitance screens 261 embedded therein and arranged alternately with insulating layers, with gradually increasing inner diameters and nested in sequence.

[0046] Preferably, as Figure 1 shown, the novel integrated combined electrical apparatus of the present invention further includes a current transformer CT0 sleeved outside the first bushing 1 and a current transformer CT1 sleeved outside the breaker insulating core 23.

[0047] Further, as Figure 1 shown, the first insulating core 11 of the first bushing 1 is a capacitive insulating core, including a group of capacitance screens embedded therein and arranged alternately with insulating layers, with gradually increasing inner diameters and nested in sequence. This group of capacitance screens includes n1 capacitance screens, where n1 is an integer greater than or equal to 2. The high voltage in the first conductor 10 is gradually divided and insulated by this group of capacitance screens to improve the electric field distribution. Further, this group of capacitance screens includes an insulating capacitor C1 composed of multiple capacitance screens on the inner side, and a voltage-dividing capacitor C2 composed of multiple capacitance screens located outside the insulating capacitor C1. The insulating capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitance voltage divider, serving as a potential transformer PT0, which can be used to provide detection signals. Further, outside the insulating capacitor C1 and the voltage-dividing capacitor C2, multiple capacitance screens that are insulated from each other and nested in sequence along the axial direction from the outer end to the inner end of the first bushing can also be provided to form a shielding capacitor to shield external signal interference.

[0048] The breaker insulating core 23 of the breaker 2 is a capacitive insulating core, including one or more groups of capacitance screens respectively arranged axially in the breaker insulating core 23. Each group of capacitance screens includes multiple capacitance screens arranged alternately with insulating layers, with gradually increasing inner diameters and nested in sequence for insulation protection. As Figure 1In the illustrated embodiment, preferably, the breaker insulation core 23 includes two sets of capacitor screens respectively embedded at both ends thereof. Each set of capacitor screens includes multiple capacitor screens alternately arranged with the insulating layer, with an increasingly larger inner diameter and sequentially sleeved. The two sets of capacitor screens respectively surround the flanges at both ends of the vacuum interrupter 20, and each capacitor screen of the two sets of capacitor screens respectively surrounds the corresponding flange to protect against the high voltage at the two ends of the flange. Further, among the multiple capacitor screens of one set of capacitor screens near one end of the first connector 1-2 in the breaker insulation core 23, the multiple capacitor screens are gradually offset from the inside to the outside towards the end close to the breaker operating mechanism 24, while among the multiple capacitor screens of the other set of capacitor screens near the breaker operating mechanism 24, the two ends of the capacitor screens gradually become longer from the inside to the outside to form a trapezoidal structure, constituting a fully enclosed bushing-type breaker. Of course, the offset modes of the two sets of capacitor screens can be adjusted according to different usage conditions. Further, there are n2 common capacitor screens alternately arranged with the insulating layer, with an increasingly larger diameter and sequentially sleeved outside the two sets of capacitor screens, where n2 is an integer greater than or equal to 1, and n2 is preferably 2. In addition, if necessary, the multiple capacitor screens of each set of capacitor screens in the breaker insulation core 23 can also be formed into a series-connected insulating capacitor C1 and a voltage-dividing capacitor C2 to constitute a capacitive voltage divider as the potential transformer PT1, and the method is similar to that of the potential transformer PT0 in the first insulation core 11, which will not be elaborated here.

[0049] The second insulation core 31 of the second bushing 3 is a capacitive insulation core, including multiple capacitor screens embedded therein and alternately arranged with the insulating layer, with an increasingly larger inner diameter and sequentially sleeved. Similar to the first insulation core 11, the multiple capacitor screens can also be used to form a potential transformer PT. In this embodiment, the difference between the second insulation core 31 and the first insulation core 11 is that the inside of the second insulation core 31 is a cavity for the flexible conductor of the second conductor 30 to pass through, while the first insulation core 11 tightly wraps around the first conductor 10. Specifically, as Figure 1The direction shown, the left end and the right end of the first sleeve 1 are respectively the inner end and the outer end of the first sleeve, and the left end and the right end of the second sleeve 3 are respectively the inner end and the outer end of the second sleeve; the right end of the first insulating shell cross arm of the first connector 1-2 is connected to the inner end of the first sleeve, the first connector conductor 1-20 is arranged in the first insulating shell cross arm, and the right end is electrically connected to the left end of the first conductor 10 and the upper end of the static contact conductor 22 respectively. The lower end of the static contact conductor 22 is electrically connected to the static contact of the circuit breaker. The upper end of the first insulating shell vertical arm is connected to the middle of the first insulating shell cross arm. The upper end of the circuit breaker insulating core 23 is inserted into the first insulating shell vertical arm. The lower end of the circuit breaker insulating core 23 is connected to the upper end of the second insulating shell vertical arm of the second connector 2-3. The lower end of the second insulating shell vertical arm is connected to the upper end of the circuit breaker support sleeve 26. The lower end of the circuit breaker support sleeve 26 is connected to the housing of the circuit breaker operating mechanism 24. The left end of the second insulating shell cross arm of the second connector 2-3 is connected to the middle of the second insulating shell vertical arm, and the right end of the second insulating shell cross arm is connected to the left end of the second insulating core 31. In the novel integrated combined electrical apparatus of the present invention, the current path formed by the first conductor 10, the first connector conductor 1-20, the static contact conductor 22, the static contact of the circuit breaker, the moving contact of the circuit breaker, the moving contact conductor 21, and the second conductor 30 is completely wrapped in the insulating structure composed of the first insulating core 11, the first insulating shell 1-21, the circuit breaker insulating core 23, the second insulating shell 2-30, and the second insulating core 31, thereby ensuring the insulation of the novel integrated combined electrical apparatus of the present invention. Therefore, there is no need to fill insulating gases such as air and sulfur hexafluoride, thereby greatly reducing the volume of the combined electrical apparatus.

[0050] Preferably, as Figure 1 shown, the novel integrated combined electrical apparatus of the present invention further includes a third connector 5, a fourth connector 6, and at least one of a plug-in type fully shielded lightning arrester 1a, a plug-in type fully shielded earthing switch 2a, and a plug-in type fully shielded voltage sensor 3a; the first connector 1-2 and / or the third connector 5 and / or the fourth connector 6 are connected to at least one of the plug-in type fully shielded lightning arrester 1a, the plug-in type fully shielded earthing switch 2a, and the plug-in type fully shielded voltage sensor 3a; preferably, the first connector 1-2 and / or the third connector 5 and / or the fourth connector 6 are plug-connected to the plug-in type fully shielded lightning arrester 1a or the plug-in type fully shielded earthing switch 2a or the plug-in type fully shielded voltage sensor 3a, which is convenient for configuration according to user requirements.

[0051] Preferably, as Figure 1 shown, the third connector 5 includes a third insulating shell 51 and a third connector conductor 50 arranged in the third insulating shell 51. Both ends of the first conductor 10 are electrically connected to the static contact of the circuit breaker and the third connector conductor 50 respectively. One end of the third insulating shell 51 is sleeved outside the outer end of the first sleeve. Further, as Figure 1As shown, the third insulating housing 51 has an L-shaped structure, including a third insulating housing cross arm and a third insulating housing vertical arm. One end of the third insulating housing cross arm is sleeved outside the outer end of the first sleeve, and the other end is provided with a third connector slot and is bent and connected to the third insulating housing vertical arm. The external power input cable or busbar is inserted into the third insulating housing vertical arm and is electrically connected to the third connector conductor 50. Further, as Figure 1 shown, the first sleeve 1 further includes a first sleeve support housing 12 sleeved outside the first insulating core 11 and located between the first insulating core 11 and the third insulating housing cross arm. The first sleeve support housing 12 is sleeved outside the first insulating core 11, exposing one end of the first insulating core 11 connected to the first insulating housing 1-21, so that one end of the first insulating core 11 and the first conductor 10 are inserted into the first insulating housing 1-21, and the third insulating housing 51 is wrapped outside the first sleeve support housing 12. The first sleeve support housing 12 is an insulating support member. In this embodiment, the first sleeve support housing 12 is an epoxy resin insulating member embedded with fiberglass material.

[0052] The third insulating housing 51 includes a prefabricated rubber insulating layer, an epoxy resin insulating member disposed in the prefabricated rubber insulating layer, an outer semi-conductive layer disposed outside the prefabricated rubber insulating layer, and an inner semi-conductive layer disposed inside the epoxy resin insulating member. The epoxy resin insulating member is disposed corresponding to the third connector conductor 50 for covering the third connector conductor 50 and forming a third connector slot. The inner semi-conductive layer is in contact with the third connector conductor 50, and the outer semi-conductive layer is used for grounding. In this embodiment, the outer semi-conductive layer and the inner semi-conductive layer are made of conductive rubber, and the prefabricated rubber insulating layer is made of silicone rubber, which is convenient for sleeving outside the first sleeve and forming the third insulating housing vertical arm for covering the power input cable or busbar.

[0053] In this embodiment, the third insulating housing 51 has an L-shaped structure, which is convenient for setting the third connector slot. Of course, the third connector slot may not be provided. When the third connector slot is not provided, the third insulating housing 51 may also be in a straight shape or an L shape or other structures.

[0054] Preferably, as Figure 1 shown, the fourth connector 6 includes a fourth insulating housing 61 and a fourth connector conductor 60 disposed in the fourth insulating housing 61. Both ends of the second conductor 30 are electrically connected to the moving contact and the fourth connector conductor 60 respectively. One end of the fourth insulating housing 61 is sleeved outside the outer end of the second sleeve. Further, as Figure 1 shown, the other end of the fourth insulating housing 61 is provided with a fourth connector slot, and the external power output cable or busbar is inserted into the fourth connector slot and is electrically connected to the third connector conductive 60. Further, as Figure 1As shown, the second sleeve 3 further includes a second sleeve support shell 32 sleeved outside the second insulating core 31 and located between the second insulating core 31 and the fourth insulating shell 61. The second sleeve support shell 32 integrally wraps the second insulating core 31. The fourth insulating shell 61 is wrapped outside the second insulating core 31. The inside of the second insulating core 31 is a cavity, and the end connected to the second connector 2-3 is a tapered groove. One end of the second insulating shell cross arm of the second insulating shell 2-30 of the second connector 2-3 is a tapered protrusion, and one end of the second insulating shell cross arm of the second insulating shell 2-30 is inserted into the second insulating core 31.

[0055] The second sleeve support shell 32 is an insulating support member. In this embodiment, the second sleeve support shell 32 is an epoxy resin insulating member embedded with fiberglass material.

[0056] The structure of the fourth insulating shell 61 is the same as that of the third insulating shell 51, including a prefabricated rubber insulating layer, an epoxy resin insulating member arranged in the prefabricated rubber insulating layer, an outer semi-conductive layer arranged outside the prefabricated rubber insulating layer, and an inner semi-conductive layer arranged inside the epoxy resin insulating member. The epoxy resin insulating member is arranged corresponding to the fourth connector conductor 60 for wrapping the fourth connector conductor 60 and forming a fourth connector slot. The inner semi-conductive layer is in contact with the fourth connector conductor 60, and the outer semi-conductive layer is used for grounding. In this implementation, the outer semi-conductive layer and the inner semi-conductive layer are made of conductive rubber, and the prefabricated rubber insulating layer is made of silicone rubber, which is convenient for sleeving on the outside of the third sleeve and the output cable at both ends respectively. The fourth insulating shell 61 can be set in a straight shape or an L shape or other shapes according to needs.

[0057] Specifically, as Figure 1 shown in the direction, the left end of the third insulating shell cross arm is sleeved outside the first sleeve support shell 12, the right end of the third insulating shell cross arm is provided with a third connector slot, and the lower end of the third insulating shell vertical arm is bent and connected to the right end of the third insulating shell cross arm; the left end of the fourth insulating shell is sleeved outside the second sleeve support shell 32, and the fourth connector conductor 60 is arranged inside the right end of the fourth insulating shell.

[0058] Preferably, as Figure 1 shown, the novel integrated combined electrical apparatus of the present invention includes a combined electrical apparatus housing H, and a fixed partition for fixing the first sleeve 1, the circuit breaker 2, and the second sleeve 3 is arranged inside the combined electrical apparatus housing H. According to needs, the novel integrated combined electrical apparatus of the present invention can also be installed by a bracket, and it is a fully enclosed combined electrical apparatus, which can be without any outer protective housing, or can be directly buried underground, or can be placed underwater, and is suitable for various use environments.

[0059] As Figure 2A shown, it is the first embodiment of the plug-in fully shielded lightning arrester 1a.

[0060] AsFigure 2A As shown, the pluggable fully shielded lightning arrester 1a includes a lightning arrester connection assembly 10a, a lightning arrester valve plate group 12a, a lightning arrester insulating core 13a, and a lightning arrester flange 15a. The lightning arrester connection assembly 10a includes a lightning arrester insulating shell 101a and a lightning arrester connection conductor 100a. One end of the lightning arrester insulating shell 101a is a lightning arrester plug 1011a that is inserted and mated with the first connector slot 1-22 of the first connector 1-2, the third connector slot of the third connector 5, or the fourth connector slot of the fourth connector 6. The lightning arrester connection conductor 100a is disposed within the lightning arrester plug 1011a, with one end electrically connected to the lightning arrester valve plate group 12a and the other end electrically connected to the first connector 1-2, the third connector 5, or the fourth connector 6. The lightning arrester valve plate group 12a is disposed within the lightning arrester insulating shell 101a. The lightning arrester insulating core 13a is sleeved outside the lightning arrester valve plate group 12a and is located between the lightning arrester valve plate group 12a and the lightning arrester insulating shell 101a. The lightning arrester flange 15a is disposed at the other end of the lightning arrester insulating shell 101a.

[0061] Furthermore, as Figure 2A shown, the pluggable fully shielded lightning arrester 1a further includes a lightning arrester transition conductor 11a disposed within the lightning arrester insulating shell 101a and located between the lightning arrester connection conductor 100a and the lightning arrester valve plate group 12a. One end of the lightning arrester transition conductor 11a is electrically connected to the lightning arrester connection conductor 100a, and the other end is electrically connected to one end of the lightning arrester valve plate group 12a. Furthermore, as Figure 2A shown, the lightning arrester insulating shell 101a is an L-shaped structure, including a lightning arrester insulating shell cross arm and a lightning arrester insulating shell vertical arm. One end of the lightning arrester insulating shell cross arm is the lightning arrester plug 1011a, and the other end is bent and connected to one end of the lightning arrester insulating shell vertical arm. The other end of the lightning arrester insulating shell vertical arm is connected to the lightning arrester flange 15a. The lightning arrester transition conductor 11a, the lightning arrester insulating core 13a, and the lightning arrester valve plate group 12a are disposed in the middle of the lightning arrester insulating shell vertical arm.

[0062] Preferably, as Figure 2A shown, the lightning arrester insulating core 13a includes a group of capacitor screens embedded therein and alternately arranged with insulating layers, with gradually increasing diameters and sequentially nested. The capacitor screens of this group are offset in sequence from the inside to the outside and along the axial direction from the end close to the lightning arrester connection conductor 100a to the end close to the lightning arrester flange 15a. Furthermore, as Figure 2A ​As shown in the figure, the pluggable fully shielded lightning arrester 1a further includes a lightning arrester valve disc lead wire 17a and a lightning arrester capacitance voltage dividing lead wire 16a. The two lightning arrester valve disc lead wires 17a are respectively electrically connected to the two ends of a lightning arrester valve disc away from the lightning arrester connection conductor 100a in the lightning arrester valve disc group 12a, one is grounded and the other is used as a voltage dividing signal; the lightning arrester valve disc away from the lightning arrester connection conductor 100a in the lightning arrester valve disc group 12a serves as a valve disc voltage dividing capacitor, and the other lightning arrester valve discs serve as valve disc main capacitors. The valve disc main capacitor and the valve disc voltage dividing capacitor form a capacitance voltage divider to output a signal. The capacitance screen group in the lightning arrester insulating core 13a can form a capacitance voltage divider. This group of capacitance screens includes an insulating capacitor C1 composed of multiple inner capacitance screens and a voltage dividing capacitor C2 composed of multiple capacitance screens located outside the insulating capacitor C1. The insulating capacitor C1 and the voltage dividing capacitor C2 are connected in series to form a capacitance voltage divider. Adopting a scheme similar to that of the first bushing 1, the lightning arrester capacitance voltage dividing lead wire 16a is connected to the capacitance voltage divider. The two lightning arrester capacitance voltage dividing lead wires 16a, one is connected to the outermost capacitance screen for grounding, and the other is electrically connected to the n3th capacitance screen from the outside in the capacitance screen group in the lightning arrester insulating core 13a, where n3 is an integer greater than or equal to 2. Further, n3 is preferably 2. It should be noted that the lightning arrester valve disc lead wire 17a and the lightning arrester capacitance voltage dividing lead wire 16a are used to output detection signals. Of course, as a deteriorated scheme, only a grounding lead can be provided, without providing a capacitance voltage divider and the corresponding voltage dividing signal wires, and no detection signals are output.

[0063] Specifically, as Figure 2A shown in the figure, the left end of the cross arm of the lightning arrester insulating shell is a lightning arrester plug 1011a, and the right end is provided with a lightning arrester slot 1011a and is bent and connected to the upper end of the vertical arm of the lightning arrester insulating shell. The left end of the lightning arrester connection conductor 100a protrudes outside the lightning arrester plug 1011a, and the right end is connected to the upper end of the lightning arrester transition conductor 11a through a fastening screw 14a. The lower end of the lightning arrester transition conductor 11a is connected to the upper end of the lightning arrester valve disc group 12a. The lightning arrester flange 15a is arranged at the lower end of the vertical arm of the lightning arrester insulating shell and is connected to the lower end of the lightning arrester valve disc group 12a. The lightning arrester valve disc lead wire 17a is connected to the upper and lower ends of the lowermost lightning arrester valve disc. The capacitance screens of the lightning arrester insulating core 13a are sequentially offset downward from the upper end of the vertical arm of the lightning arrester insulating shell to the lower end of the vertical arm of the lightning arrester insulating shell. The lightning arrester slot 1010a arranged at the right end of the cross arm of the lightning arrester insulating shell is used for continued plugging and matching with other devices, such as connecting a pluggable fully shielded earthing switch 2a or a pluggable fully shielded voltage sensor 3a. Of course, if there is no need to connect other structures, the right end of the cross arm of the lightning arrester insulating shell is a closed lightning arrester insulating shell.

[0064] As Figure 2B shown in the figure, it is the second embodiment of the pluggable fully shielded lightning arrester 1a.

[0065] The difference between this embodiment and the first embodiment is that lightning arrester slots 1010a are provided at both ends of the cross arm of the lightning arrester insulating housing.

[0066] It should be noted that when the first connection head slot 1-22 of the first connection head 1-2, the third connection head slot of the third connection head 5, and the fourth connection head slot of the fourth connection head 6 are changed to plugs, they are pluggable and mating with the pluggable fully shielded lightning arrester 1a of the second embodiment.

[0067] As Figure 3A shown, it is the first embodiment of the pluggable fully shielded earthing switch 2a.

[0068] As Figure 3A shown, the pluggable fully shielded earthing switch 2a includes a switch connecting component 20a, a switch static contact 21a, a switch moving contact 22a, a switch driving shaft 23a, a switch operating mechanism 24a, and a switch insulating core 25a; the switch connecting component 20a includes a switch insulating housing 201a and a switch connecting conductor 200a. One end of the switch insulating housing 201a is a switch plug 2011a that is pluggable and mating with the first connection head slot 1-22 of the first connection head 1-2, the third connection head slot of the third connection head 5, or the fourth connection head slot of the fourth connection head. The switch connecting conductor 200a is arranged inside the switch plug 2011a. The switch static contact 21a and the switch moving contact 22a are relatively arranged inside the switch insulating housing 201a. One end of the switch static contact 21a is electrically connected to the switch connecting conductor 200a, and the other end is mated with one end of the switch moving contact 22a. The other end of the switch moving contact 22a is connected to the switch operating mechanism 24a through the switch driving shaft 23a. The switch insulating core 25a wraps around the outside of the switch moving contact 22a and the switch driving shaft 23a and is located between the switch moving contact 22a and the switch insulating housing 201a. The other end of the switch insulating housing 201a is connected to the housing of the switch operating mechanism 24a. Further, as Figure 3A shown, the switch insulating housing 201a is connected to the housing of the switch operating mechanism 24a through a switch flange 27a. Further, as Figure 3AAs shown, the disconnecting switch insulating housing 201a has an L-shaped structure, including a disconnecting switch insulating housing cross arm and a disconnecting switch insulating housing vertical arm. One end of the disconnecting switch insulating housing cross arm is a disconnecting switch plug 2011a, and the other end is bent and connected to one end of the disconnecting switch insulating housing vertical arm. The other end of the disconnecting switch insulating housing vertical arm is connected to the housing of the disconnecting switch operating mechanism 24a. The disconnecting switch static contact 21a, disconnecting switch moving contact 22a, disconnecting switch driving shaft 23a, and disconnecting switch insulating core 25a are all arranged in the middle of the disconnecting switch insulating housing vertical arm. Further, at one end where the disconnecting switch insulating housing cross arm is connected to the disconnecting switch insulating housing vertical arm, there is a disconnecting switch slot 2010a for connecting other plug-in components or accessing incoming and outgoing cables or busbars, such as connecting a plug-in fully shielded lightning arrester 1a or a plug-in fully shielded voltage sensor 3a. Of course, the disconnecting switch slot 2010a can also not be provided, and the right end of the disconnecting switch insulating housing cross arm is then a closed disconnecting switch insulating housing.

[0069] Preferably, as Figure 3A shown, the disconnecting switch insulating core 25a includes a group of capacitor screens embedded therein and arranged alternately with an insulating layer, with gradually increasing diameters and sequentially nested. The capacitor screens of this group of capacitor screens are offset in sequence from the inside to the outside and along the axial direction from the end where the disconnecting switch static contact 21a and the disconnecting switch moving contact 22a cooperate towards the end close to the disconnecting switch operating mechanism 24a. Further, as Figure 3A shown, the plug-in fully shielded earthing disconnecting switch 2a further includes a disconnecting switch capacitor voltage division lead-out wire 26a. The capacitor screen group in the disconnecting switch insulating core 25a can form a capacitor voltage divider. This group of capacitor screens includes an insulating capacitor C1 composed of multiple capacitor screens on the inner side, and a voltage dividing capacitor C2 composed of multiple capacitor screens located outside the insulating capacitor C1. The insulating capacitor C1 and the voltage dividing capacitor C2 are connected in series to form a capacitor voltage divider. Adopting a scheme similar to that of the first bushing 1, the disconnecting switch capacitor voltage division lead-out wire 26a is connected to the capacitor voltage divider. There are two disconnecting switch capacitor voltage division lead-out wires 26a. One is connected to the outermost capacitor screen for grounding, and the other is electrically connected to the n4th capacitor screen from the outside of the capacitor screen group embedded in the disconnecting switch insulating core 25a (i.e., the capacitor screen at the connection of the insulating capacitor C1 and the voltage dividing capacitor C2), where n4 is an integer greater than or equal to 2. Further, n4 is preferably 2. As a degraded scheme, it is also possible not to form a capacitor voltage divider and only rely on the capacitor screen group for voltage division insulation without outputting detection signals.

[0070] Specifically, as Figure 3AIn the direction shown, the left end of the knife switch insulating shell horizontal arm is a knife switch plug 2011a, and the right end is provided with a knife switch slot 2010a and is connected to the upper end of the knife switch insulating shell vertical arm, and the lower end of the knife switch insulating shell vertical arm is connected to the shell of the knife switch operating mechanism 24a through the knife switch flange 27a; the left end of the knife switch connecting conductor 200a protrudes from the outside of the knife switch plug 2011a, and the left end is connected to the upper end of the knife switch static contact 21a, and the lower end of the knife switch static contact 21a cooperates with the upper end of the knife switch moving contact 22a, and the knife switch moving contact 2 The lower end of 2a is connected to the knife switch operating mechanism 24a through the knife switch drive shaft 23a, and the knife switch insulating core 25a is sleeved on the outside of the knife switch static contact 21a, the knife switch moving contact 22a, and the knife switch drive shaft 23a and is located inside the vertical arm of the knife switch insulating shell; the capacitor screen embedded in the knife switch insulating core 25a is offset from the inside to the outside and axially from the upper end of the vertical arm of the knife switch insulating shell to the lower end of the vertical arm of the knife switch insulating shell, and the knife switch capacitor voltage divider lead 26a is electrically connected to the two outermost capacitor screens of the capacitor screen group.

[0071] like Figure 3B FIG. 2 shows a second embodiment of the pluggable fully shielded grounding switch 2 a.

[0072] The difference between this embodiment and the first embodiment is that both ends of the cross arm of the knife switch insulation shell are provided with knife switch slots 3010a.

[0073] It should be noted that when the first connector slot 1-22 of the first connector 1-2, the third connector slot of the third connector 5 and the fourth connector slot of the fourth connector 6 are changed into plugs, they will be pluggable and compatible with the pluggable fully shielded grounding switch 2a of the second embodiment.

[0074] like Figure 4A FIG. 1 shows a first embodiment of the pluggable fully shielded voltage sensor.

[0075] like Figure 4AAs shown, the pluggable fully shielded voltage sensor includes a sensor connection component 30a, a sensor transition conductor 31a, a sensor insulator 32a, a sensor insulating core 33a, and a sensor flange 34a; the sensor connection component 30a includes a sensor insulating housing 301a and a sensor connection conductor 300a. One end of the sensor insulating housing 301a is a sensor plug 3011a that is inserted and mated with the first connector slot 1-22 of the first connector 1-2, the third connector slot of the third connector 5, or the fourth connector slot of the fourth connector 6. The sensor connection conductor 300a is disposed in the middle of the sensor plug 3011a, and one end is electrically connected to the first connector 1-2, the third connector 5, or the fourth connector 6. One end of the sensor transition conductor 31a is electrically connected to the sensor connection conductor 300a, and the other end is connected to one end of the sensor insulator 32a. The sensor insulating core 33a is wrapped outside the sensor transition conductor 31a and the sensor insulator 32a and is located inside the sensor insulating housing 301a. The sensor flange 34a is disposed at the other end of the sensor insulating housing 301a and is connected to the other end of the sensor insulator 32a. Further, as Figure 4A shown, the sensor insulating housing 301a is an L-shaped structure, including a sensor insulating housing cross arm and a sensor insulating housing vertical arm. One end of the sensor insulating housing cross arm is the sensor plug 3011a, and the other end is bent and connected to one end of the sensor insulating housing vertical arm. The other end of the sensor insulating housing vertical arm is connected to the sensor flange 34a; the sensor transition conductor 31a, the sensor insulator 32a, and the sensor insulating core 33a are disposed in the middle of the sensor insulating housing vertical arm.

[0076] Preferably, as Figure 4A shown, the sensor insulating core 33a includes a group of capacitor screens that are embedded therein and arranged alternately with insulating layers, with an inner diameter that gradually increases and are sequentially nested. The capacitor screens of this group of capacitor screens are offset from the sensor transition conductor 31a to the direction where the sensor flange 34a is located along the axial direction from the inside to the outside. Further, as Figure 4AAs shown, the pluggable fully shielded voltage sensor 3a further includes a sensor capacitor voltage division lead-out wire 35a. The capacitor screen group in the sensor insulating core 33a can form a capacitor voltage divider. This group of capacitor screens includes an insulating capacitor C1 composed of multiple inner capacitor screens, and a voltage dividing capacitor C2 composed of multiple capacitor screens located outside the insulating capacitor C1. The insulating capacitor C1 and the voltage dividing capacitor C2 are connected in series to form a capacitor voltage divider. Adopting a scheme similar to that of the first bushing 1, the sensor capacitor voltage division lead-out wire 35a is connected to the capacitor voltage divider. There are two sensor capacitor voltage division lead-out wires 35a. One is connected to the outermost capacitor screen for grounding, and the other is electrically connected to the outermost n5 capacitor screens of the capacitor screen group embedded in the sensor insulating core 33a (i.e., the capacitor screen at the connection of the insulating capacitor C1 and the voltage dividing capacitor C2), where n5 is an integer greater than or equal to 2. Further, n5 is preferably 2. As a degraded scheme, it is also possible not to form a capacitor voltage divider, and only rely on the capacitor screen group for voltage division insulation without outputting detection signals.

[0077] Specifically, as Figure 4A shown in the direction, the left end of the horizontal arm of the sensor insulating shell is the sensor plug 3011a, and the right end is provided with a sensor slot 3010a and is connected to the upper end of the vertical arm of the sensor insulating shell. The lower end of the vertical arm of the sensor insulating shell is connected to the sensor flange 34a; the left end of the sensor connection conductor 300a protrudes outside the sensor plug 3011a, and the right end is connected to the upper end of the sensor transition conductor 31a. The lower end of the sensor transition conductor 31a is connected to the upper end of the sensor insulator 32a, and the lower end of the sensor insulator 32a is connected to the sensor flange 34a; the capacitor screen group embedded in the sensor insulating core 33a, and the capacitor screens of this capacitor screen group are sequentially offset downward from the upper end to the lower end of the sensor insulating core 33a from the inside to the outside. The sensor slot 3010a is used to connect other pluggable components or access incoming and outgoing cables or busbars, such as connecting the pluggable fully shielded lightning arrester 1a or the pluggable fully shielded earthing switch 2a.

[0078] As Figure 4B shown, it is the second embodiment of the pluggable fully shielded voltage sensor 3a.

[0079] The difference between this embodiment and the first embodiment is that knife switch slots 3010a are provided at both ends of the horizontal arm of the sensor insulating shell.

[0080] It should be noted that when the first connection head slot 1-22 of the first connection head 1-2, the third connection head slot of the third connection head 5, and the fourth connection head slot of the fourth connection head 6 are changed to plugs, they are pluggable and matched with the pluggable fully shielded sensor 3a of the second embodiment.

[0081] Preferably, the first insulating core 11 of the first sleeve 1, the second insulating core 31 of the second sleeve 3, the circuit breaker insulating core 23 of the circuit breaker 2, the arrester insulating core 13a of the plug-in type fully shielded arrester 1a, the switch insulating core 25a of the plug-in type fully shielded earthing switch 2a, and the sensor insulating core 33a of the plug-in type fully shielded voltage sensor 3a are formed by using glass fiber materials impregnated with epoxy resin, insulating paper or other insulating materials as the insulating layer, and semi-conductive tape or metal tape as the capacitive screen, and adopting an alternating winding method of the insulating layer and the capacitive screen. Preferably, the outermost capacitive screen of the capacitive screen group embedded in the first insulating core 11, the second insulating core 31, the circuit breaker insulating core 23, the arrester insulating core 13a, the switch insulating core 25a, and the sensor insulating core 33a is grounded. The above structure makes the outer shell of the novel integrated electrical apparatus of the present invention at the ground potential as a whole, thereby greatly improving the power consumption safety of users.

[0082] The arrester insulating shell 101a, the switch insulating shell 201a, and the sensor insulating shell 301a can be made of cast epoxy resin or epoxy resin embedded with glass fiber materials. As Figure 5 shown, the present invention also discloses a substation, which includes the novel integrated electrical apparatus.

[0083] Preferably, as Figure 5 shown, the substation of the present invention further includes a substation outer shell 1h and a transformer 1c. The transformer 1c includes a transformer input end 10c and a transformer output end 11c. The transformer input end 10c is connected to one end of a high-voltage bus 2c through a high-voltage elbow joint 3c. The other end of the high-voltage bus 2c is connected to the fourth connection head 6 of a group of novel integrated electrical apparatuses. The transformer output end 11c is connected to one end of a low-voltage bus 5c through a low-voltage elbow joint 4c. The other end of the low-voltage bus 5c is connected to the third connection head 5 of another group of novel integrated electrical apparatuses. The transformer 1c, the high-voltage elbow joint 3c, the high-voltage bus 2c, the low-voltage elbow joint 4c, the low-voltage bus 5c, and the two groups of novel integrated electrical apparatuses are all arranged in the substation outer shell 1h.

[0084] The substation of the present invention includes the novel integrated electrical apparatus. The novel integrated electrical apparatus on the transformer input side can replace the existing GIS integrated electrical apparatus without filling any gas, and has a small volume and less floor area. The novel integrated electrical apparatus on the transformer output side can replace the existing switch cabinet without setting up a low-voltage switch cabinet, completely changing the construction method of the existing substation and greatly reducing the construction difficulty of the substation. It should be noted that the high voltage and low voltage herein are relative concepts. For example, the input side of the transformer is a high voltage of 110 KV, and the output side is a high voltage of 35 KV. The corresponding novel integrated electrical apparatus is configured according to the matching high voltage, and the substation outer shell 1h may not be provided, only for the convenience of management and installation.

[0085] Further, as Figure 5 shown, the substation is a movable substation, including a substation housing 1h, and lifting rings for lifting the movable substation are provided at both ends of the bottom plate of the substation housing 1h. The movable substation of the present invention includes the novel integrated combined electrical apparatus, which can significantly reduce the volume and self-weight of the movable substation and significantly improve the mobility of the movable substation.

[0086] Preferably, as Figure 5 shown, a group of novel integrated combined electrical apparatuses connected to the transformer input end 10c of the transformer 1c is a high-voltage side combined electrical apparatus, and a group of novel integrated combined electrical apparatuses connected to the transformer output end 11c of the transformer 1c is a low-voltage side combined electrical apparatus; the third connector 5 of the high-voltage side combined electrical apparatus is used to access high-voltage electricity from a high-voltage incoming power cable, for example, an overhead line is connected through a bushing or a cable is connected through a cable head, and the first connector slot 1-22 of the first connector 1-2 is connected to one of the plug-in type fully shielded lightning arrester 1a, the plug-in type fully shielded earthing switch 2a, and the plug-in type fully shielded voltage sensor 3a; according to needs, the plug-in type fully shielded lightning arrester 1a, the plug-in type fully shielded earthing switch 2a, and the plug-in type fully shielded voltage sensor 3a can also be plugged in successively. As Figure 6 shown, the third connector 5 of the low-voltage side combined electrical apparatus can also be connected to at least one of the plug-in type fully shielded lightning arrester 1a, the plug-in type fully shielded earthing switch 2a, and the plug-in type fully shielded voltage sensor 3a, and the plug-in type fully shielded lightning arrester 1a, the plug-in type fully shielded earthing switch 2a, and the plug-in type fully shielded voltage sensor 3a can also be plugged in successively. The fourth connector 6 of the low-voltage side combined electrical apparatus is used as an output end to be connected to an output cable, and can also be connected to at least one of the plug-in type fully shielded lightning arrester 1a, the plug-in type fully shielded earthing switch 2a, and the plug-in type fully shielded voltage sensor 3a.

[0087] The high-voltage elbow joint 3c and the low-voltage elbow joint 4c can adopt existing European or American cable joints. Additionally, as a deteriorated solution, only one group of novel integrated combined electrical apparatuses can be set to replace the existing GIS combined electrical apparatus or low-voltage switchgear, that is, only the high-voltage side combined electrical apparatus or the low-voltage side combined electrical apparatus is set, and the existing low-voltage switchgear or GIS combined electrical apparatus is still used on the other side of the transformer.

[0088] Further, the first connector 1-2, the third connector 5, and the fourth connector 6 all include insulating plugs, and the insulating plugs are matched with the first connector slot 1-22, the third connector slot, and the fourth connector slot.

[0089] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A pluggable fully shielded voltage sensor, characterized in that: The pluggable fully shielded voltage transformer includes a sensor connection component (30a), a sensor transition conductor (31a), a sensor insulator (32a), a sensor insulating core (33a), and a sensor flange (34a); The sensor connection component (30a) includes a sensor insulating shell (301a) and a sensor connection conductor (300a). One end of the sensor insulating shell (301a) is a sensor plug (3011a) or is provided with a sensor slot (3010a). The sensor connection conductor (300a) is arranged in the middle of the sensor plug (3011a). One end of the sensor transition conductor (31a) is electrically connected to the sensor connection conductor (300a), and the other end is connected to one end of the sensor insulator (32a). The sensor insulating core (33a) wraps around the sensor transition conductor (31a) and the sensor insulator (32a) and is located inside the sensor insulating shell (301a). The sensor flange (34a) is arranged at the other end of the sensor insulating shell (301a) and is connected to the other end of the sensor insulator (32a); The sensor insulating core (33) is internally embedded with a capacitor screen group. The capacitor screen group includes a group of capacitor screens embedded in the sensor insulating core (33) and alternately arranged with insulating layers, with gradually increasing inner diameters and nested in sequence; the capacitor screen group includes an insulating capacitor C1 composed of multiple capacitor screens on the inner side, and multiple capacitor screens located outside the insulating capacitor C1 form a voltage-dividing capacitor C2. The insulating capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitive voltage divider.

2. The pluggable fully shielded voltage sensor according to claim 1, wherein: The capacitor screens of the capacitor screen group are offset in sequence from the sensor transition conductor (31a) towards the direction where the sensor flange (34a) is located, from the inside to the outside.

3. The plug-in fully shielded voltage sensor according to claim 1, wherein: The pluggable fully shielded voltage sensor further includes a sensor capacitive voltage-dividing lead-out wire (35a), and the sensor capacitive voltage-dividing lead-out wire (35a) is connected to the capacitive voltage divider.

4. The pluggable fully shielded voltage sensor according to claim 3, characterized in that: The pluggable fully shielded voltage sensor further includes two sensor capacitive voltage-dividing lead-out wires (35a). One sensor capacitive voltage-dividing lead-out wire (35a) is connected to the outermost capacitor screen of the capacitor screen group for grounding, and the other sensor capacitive voltage-dividing lead-out wire (35a) is connected to the capacitor screen at the connection point of the insulating capacitor C1 and the voltage-dividing capacitor C2.

5. The pluggable fully shielded voltage sensor according to claim 1, characterized in that: The voltage-dividing capacitor C2 is composed of n5 capacitor screens, where n5 ≥ 2.

6. The pluggable fully shielded voltage sensor according to claim 1, wherein: The sensor insulating shell (301a) is an L-shaped structure, including a sensor insulating shell cross arm and a sensor insulating shell vertical arm. One end of the sensor insulating shell cross arm is a sensor plug (3011a) or is provided with a sensor slot (3010a), and the other end is bent and connected to one end of the sensor insulating shell vertical arm. The other end of the sensor insulating shell vertical arm is connected to the sensor flange (34a); the sensor transition conductor (31a), the sensor insulator (32a), and the sensor insulating core (33a) are arranged in the middle of the sensor insulating shell vertical arm.

7. The pluggable fully shielded voltage sensor according to claim 5, characterized in that: One end of the sensor insulating shell cross arm is a sensor plug (3011a) or is provided with a sensor slot (3010a), and the other end is also provided with a sensor slot (3010a).

8. A new type of integrated combined electrical apparatus, characterized in that: The novel integrated combined electrical apparatus includes a first bushing (1), a first connector (1-2), a circuit breaker (2), a second connector (2-3), a second bushing (3), and the plug-in full-shielding voltage sensor according to any one of claims 1-7; the first bushing (1) includes a first conductor (10) and a first insulating core (11) wrapped around the outside of the first conductor (10), the two ends of the first bushing (1) are respectively a first bushing inner end and a first bushing outer end, and the first bushing inner end is connected to the circuit breaker (2) through the first connector (1-2); the second bushing (3) includes a second conductor (30) and a second insulating core (31) wrapped around the outside of the second conductor (30), the two ends of the second bushing (3) are respectively a second bushing inner end and a second bushing outer end, and the second bushing inner end is connected to the circuit breaker (2) through the second connector (2-3); the circuit breaker (2) includes a vacuum interrupter (20), a circuit breaker moving contact and a circuit breaker static contact arranged in the vacuum interrupter (20), a circuit breaker operating mechanism (24), an operating mechanism pull rod (25), and a circuit breaker insulating core (23), the vacuum interrupter (20) is located inside the circuit breaker insulating core (23), and the circuit breaker operating mechanism (24) is drivingly connected to the circuit breaker moving contact through the operating mechanism pull rod (25); the first connector (1-2) includes a first insulating shell (1-21) respectively cooperating with the first insulating core (11) and the circuit breaker insulating core (23); the second connector (2-3) includes a second insulating shell (2-30) respectively cooperating with the circuit breaker insulating core (23) and the second insulating core (31); the circuit breaker static contact is electrically connected to one end of the first conductor (10) through the first connector (1-2), and the circuit breaker moving contact is electrically connected to one end of the second conductor (30) through the second connector (2-3); The plug-in full-shielding voltage sensor is pluggably connected to the first connector (1-2), Alternatively, the novel integrated combined electrical apparatus further includes a third connector (5), the first bushing outer end is connected to an incoming power cable or bus through the third connector (5), and the plug-in full-shielding voltage sensor is pluggably connected to the third connector (5), Alternatively, the novel integrated combined electrical apparatus further includes a fourth connector (6), the second bushing outer end is connected to an outgoing power cable or bus through the fourth connector (6), and the plug-in full-shielding voltage sensor is pluggably connected to the third connector (5).

9. The novel integrated combined electrical apparatus according to claim 8, wherein: The first connector (1-2) further includes a first connector conductor (1-20) arranged in the first insulating shell (1-21) and electrically connected to one end of the first conductor (10); the first insulating shell (1-21) is of a three-way structure, including a first insulating shell cross arm and a first insulating shell vertical arm, one end of the first insulating shell vertical arm is connected to the middle of the first insulating shell cross arm, the other end of the first insulating shell vertical arm is connected to one end of the circuit breaker insulating core (23), one end of the first insulating shell cross arm is connected to one end of the first insulating core (11), and the other end of the first insulating shell cross arm is provided with a first connector slot (1-22); The third connector (5) includes a third insulating housing (51) and a third connector conductor (50) disposed within the third insulating housing (51). Both ends of the first conductor (10) are electrically connected to the static contact of the circuit breaker and the third connector conductor (50) respectively. One end of the third insulating housing (51) is sleeved outside the outer end of the first bushing; the third insulating housing (51) is of an L-shaped structure, including a third insulating housing cross arm and a third insulating housing vertical arm. One end of the third insulating housing cross arm is sleeved outside the outer end of the first bushing, and the other end is provided with a third connector slot and is bent and connected to the third insulating housing vertical arm. The external incoming power cable or busbar is inserted into the third insulating housing vertical arm and is electrically connected to the third connector conductor (50). The fourth connector (6) includes a fourth insulating housing (61) and a fourth connector conductor (60) disposed within the fourth insulating housing (61). Both ends of the second conductor (30) are electrically connected to the moving contact of the circuit breaker and the fourth connector conductor (60) respectively. One end of the fourth insulating housing (61) is sleeved outside the outer end of the second bushing; the other end of the fourth insulating housing (61) is provided with a fourth connector slot, and the external outgoing power cable or busbar is inserted into the fourth connector slot and is electrically connected to the fourth connector conductor (60). The sensor plug (3011a) of the pluggable fully shielded voltage sensor (3a) is in pluggable fit with the first connector slot (1-22) or the third connector slot or the fourth connector slot.

10. The novel integrated combined electrical apparatus according to claim 8, characterized in that: The novel integrated combined electrical apparatus further includes a pluggable fully shielded lightning arrester (1a), a pluggable fully shielded earthing switch (2a). The pluggable fully shielded lightning arrester (1a), the pluggable fully shielded earthing switch (2a) and the pluggable fully shielded voltage sensor (3a) are in one-to-one pluggable fit with the first connector (1-2), the third connector (5) and the fourth connector (6).

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