New Type of Integrated Hybrid Switchgear and Substation

Abstract

A new type of integrated combined electrical appliance and substation, wherein a first bushing comprises a first conductor and a first insulating core, and the inner end of the first bushing is connected to a circuit breaker through a first connector; the second bushing comprises a second conductor and a second insulating core, and the inner end of the second bushing is connected to a circuit breaker through a second connector; the circuit breaker comprises a vacuum interrupter, a circuit breaker moving contact and a circuit breaker static contact, a circuit breaker operating mechanism, an operating mechanism pull rod and a circuit breaker insulating core, wherein the vacuum interrupter is located in the circuit breaker insulating core, and the circuit breaker operating mechanism is driven and connected to the circuit breaker moving contact through the operating mechanism pull rod; the first connector comprises a first insulating shell respectively matched with the first insulating core and the circuit breaker insulating core; the second connector comprises a second insulating shell respectively matched with the circuit breaker insulating core and the second insulating core; 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.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission, and particularly to a novel integrated combined electrical apparatus, and also to a substation including the novel integrated combined electrical apparatus. Background Art

[0002] Existing substations generally have the following two structures:

[0003] First, high-voltage cable → GIS combined electrical apparatus → transformer → switchgear cabinet;

[0004] Second, high-voltage cable → air-insulated combined electrical apparatus → transformer → switchgear cabinet.

[0005] Among them, the air-insulated combined electrical apparatus relies on air insulation, and a particularly large distance needs to be maintained between the high-voltage side electrical appliances, occupying a large installation space; while for the GIS combined electrical apparatus, insulation is achieved by filling an insulating gas (such as sulfur hexafluoride) in a closed housing. Although the volume is reduced to a certain extent compared with the air-insulated combined electrical apparatus, it still occupies a relatively large installation space. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the prior art, and provide a novel integrated combined electrical apparatus with a compact structure, good insulation performance and space-saving installation; and also provide a movable substation with a simple structure, small volume and convenient movement.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A novel integrated combined electrical apparatus, which comprises 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 comprises 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, and the first inner end of the bushing is connected to the circuit breaker 2 through the first connector 1-2; the second bushing 3 comprises 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, and the second inner end of the bushing is connected to the circuit breaker 2 through the second connector 2-3; the circuit breaker 2 comprises a vacuum arc extinguishing chamber 20, a moving contact and a static contact of the circuit breaker arranged in the vacuum arc extinguishing chamber 20, a circuit breaker operating mechanism 24, an operating mechanism pull rod 25 and a circuit breaker insulating core 23, the vacuum arc extinguishing chamber 20 is located inside the circuit breaker insulating core 23, and 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 comprises 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 comprises a second insulating shell 2-30 respectively cooperating 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.

[0009] Preferably, the novel integrated combined electrical apparatus further comprises a third connector 5 and a fourth connector 6, the first bushing 1 is connected to a power input cable through the third connector 5, and the second bushing 3 is connected to a power output cable through the fourth connector 6.

[0010] Preferably, the novel integrated combined electrical apparatus further comprises one or more of a plug-in full-shielding lightning arrester 1a, a plug-in full-shielding earthing switch 2a and a plug-in full-shielding voltage sensor 3a; the plug-in full-shielding lightning arrester 1a and / or the plug-in full-shielding earthing switch 2a and / or the plug-in full-shielding voltage sensor 3a are inserted into the first connector 1-2 and / or the third connector 5 and / or the fourth connector 6.

[0011] Preferably, the first connector 1-2 further comprises a first connector conductor 1-20 arranged in the first insulating shell 1-21 and electrically connected to the first conductor 10 at one end; the first insulating shell 1-21 has a three-way structure, which comprises 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 a first connector slot 1-22 is arranged at the other end of the first insulating shell cross arm.

[0012] Preferably, the second insulating housing 2-30 is of a three-way structure, including a second insulating housing vertical arm and a second insulating housing horizontal arm, with one end of the second insulating housing horizontal arm 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 provided therein, and the second connector T-shaped hole 2-31 includes a second connector vertical hole provided in the second insulating housing vertical arm and a second connector horizontal hole provided in the second insulating housing horizontal arm, with one end of the second connector horizontal hole communicating 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.

[0013] Preferably, the third connector 5 includes a third insulating housing 51 and a third connector conductor 50 provided inside the third insulating housing 51. Two ends of the first conductor 10 are respectively electrically connected to the static contact of the circuit breaker and the third connector conductor 50, and one end of the third insulating housing 51 is sleeved outside the outer end of the first sleeve.

[0014] The fourth connector 6 includes a fourth insulating housing 61 and a fourth connector conductor 60 provided inside the fourth insulating housing 61. Two ends of the second conductor 30 are respectively electrically connected to the moving contact of the circuit breaker and the fourth connector conductor 60, and one end of the fourth insulating housing 61 is sleeved outside the outer end of the second sleeve.

[0015] Preferably, the third insulating housing 51 is of an L-shaped structure, including a third insulating housing horizontal arm and a third insulating housing vertical arm. One end of the third insulating housing horizontal 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 incoming power cable or busbar is inserted into the third insulating housing vertical arm and is electrically connected to the third connector conductor 50.

[0016] Preferably, 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.

[0017] Preferably, the connection between the second insulating housing 2-30 and the circuit breaker insulating core 23 is filled with insulating glue, and the connection between the second insulating housing 2-30 and the second insulating core 31 is filled with insulating glue.

[0018] Preferably, the circuit breaker 2 further includes a moving contact conductor 21 and a static contact conductor 22. 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, and the moving contact of the circuit breaker is also connected to the operating mechanism pull rod 25 through the moving contact conductor 21.

[0019] Preferably, 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; the second conductor 30 is a flexible conductor, one end of which is inserted into the second insulating shell 2-30 and electrically connected to the moving contact conductor 21.

[0020] Preferably, the circuit breaker 2 further includes a circuit breaker support bushing 26, which 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. The connection between the circuit breaker support bushing 26 and the second connector 2-3 is filled with insulating glue.

[0021] Preferably, the novel integrated combined electrical apparatus further includes a current transformer CT0 sleeved outside the first bushing 1 and / or a current transformer CT1 sleeved outside the circuit breaker insulating core 23.

[0022] Preferably, the first bushing 1 further includes a first bushing support shell 12 sleeved outside the first insulating core 11, and the third insulating shell 51 is wrapped outside the first bushing support shell 12; the second bushing 3 further includes a second bushing support shell 32 sleeved outside the second insulating core 31, and the fourth insulating shell 61 is wrapped outside the second insulating core 31.

[0023] Preferably, the first insulating core 11 includes a group of capacitor screens embedded therein and arranged alternately with insulating layers, with gradually increasing inner diameters and stacked in sequence. This group of capacitor screens includes n1 capacitor screens, and n1 is an integer ≥2.

[0024] Preferably, the group of capacitor screens in the first insulating core 11 includes an insulating capacitor C1 composed of multiple 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, serving as a potential transformer PT0.

[0025] Preferably, it includes one or more groups of capacitor screens embedded in the circuit breaker insulating core 23 and arranged axially. Each group of capacitor screens includes multiple capacitor screens arranged alternately with insulating layers, with gradually increasing inner diameters and stacked in sequence.

[0026] Preferably, the circuit breaker insulating core 23 includes two groups of capacitor screens respectively embedded at both ends thereof. The two groups of capacitor screens respectively surround the flanges at both ends of the vacuum arc extinguishing chamber 20. Each group of capacitor screens includes multiple capacitor screens arranged alternately with insulating layers, with gradually increasing inner diameters and stacked in sequence. Each capacitor screen of the two groups of capacitor screens respectively surrounds the corresponding flange.

[0027] Preferably, multiple capacitive screens in each group form a series-connected insulating capacitor C1 and a voltage-dividing capacitor C2, constituting a capacitive voltage divider, which serves as a potential transformer PT1.

[0028] Preferably, the pluggable fully shielded lightning arrester 1a includes a lightning arrester connection assembly 10a, a lightning arrester varistor 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 for plugging and mating. The lightning arrester connection conductor 100a is arranged inside the lightning arrester plug 1011a and is electrically connected to one end of the lightning arrester varistor group 12a at one end. The lightning arrester varistor group 12a is arranged inside the lightning arrester insulating shell 101a. The lightning arrester insulating core 13a is sleeved outside the lightning arrester varistor group 12a and is located between the lightning arrester varistor group 12a and the lightning arrester insulating shell 101a. The lightning arrester flange 15a is arranged at the other end of the lightning arrester insulating shell 101a.

[0029] Preferably, the pluggable fully shielded lightning arrester 1a further includes a lightning arrester transition conductor 11a arranged inside the lightning arrester insulating shell 101a and located between the lightning arrester connection conductor 100a and the lightning arrester varistor 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 varistor group 12a.

[0030] Preferably, the lightning arrester insulating core 13a includes a group of capacitive screens embedded therein and arranged alternately with insulating layers, with gradually increasing diameters and sequentially nested. The capacitive screens of this group of capacitive screens are offset sequentially from the inside to the outside and along the axial direction from one end close to the lightning arrester connection conductor 100a to the end close to the lightning arrester flange 15a.

[0031] Preferably, one lightning arrester varistor away from the lightning arrester connection conductor 100a in the lightning arrester varistor group 12a serves as a varistor voltage-dividing capacitor, and the other lightning arrester varistors serve as varistor main capacitors. The varistor main capacitors and the varistor voltage-dividing capacitor constitute a capacitive voltage divider; the capacitive screen group in the lightning arrester insulating core 13a includes an insulating capacitor C1 composed of multiple capacitive screens on the inner side, and a voltage-dividing capacitor C2 composed of multiple capacitive screens located outside the insulating capacitor C1. The insulating capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form another capacitive voltage divider.

[0032] Preferably, the arrester insulating housing 101a has an L-shaped structure, including an arrester insulating housing cross arm and an arrester insulating housing vertical arm. One end of the arrester insulating housing cross arm is an arrester plug 1011a, and the other end is provided with an arrester socket 1010a and is bent and connected to one end of the arrester insulating housing vertical arm. The other end of the arrester insulating housing vertical arm is connected to the arrester flange member 15a; the arrester transition conductor 11a, the arrester insulating core 13a, and the arrester valve plate group 12a are arranged in the middle of the arrester insulating housing vertical arm.

[0033] Preferably, the pluggable fully shielded grounding knife switch 2a includes a knife switch connection assembly 20a, a knife switch static contact 21a, a knife switch moving contact 22a, a knife switch driving shaft 23a, a knife switch operating mechanism 24a, and a knife switch insulating core 25a; the knife switch connection assembly 20a includes a knife switch insulating housing 201a and a knife switch connection conductor 200a. One end of the knife switch insulating housing 201a is a knife switch plug 2011a, and the knife switch connection conductor 200a is arranged in the knife switch plug 2011a. The knife switch static contact 21a and the knife switch moving contact 22a are oppositely arranged in the knife switch insulating housing 201a. One end of the knife switch static contact 21a is electrically connected to the knife switch connection conductor 200a, and the other end is matched with one end of the knife switch moving contact 22a. The other end of the knife switch moving contact 22a is connected to the knife switch operating mechanism 24a through the knife switch driving shaft 23a. The knife switch insulating core 25a wraps around the outside of the knife switch moving contact 22a and the knife switch driving shaft 23a and is located between the knife switch moving contact 22a and the knife switch insulating housing 201a. The other end of the knife switch insulating housing 201a is connected to the housing of the knife switch operating mechanism 24a.

[0034] Preferably, the knife 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 sleeved. The capacitor screens of this group of capacitor screens are offset sequentially from the end where the knife switch static contact 21a and the knife switch moving contact 22a are matched towards the end close to the knife switch operating mechanism 24a from the inside to the outside and along the axis.

[0035] Preferably, the capacitor screen group in the knife switch insulating core 25a includes an insulating capacitor C1 composed of a plurality of inner capacitor screens, and a voltage-dividing capacitor C2 composed of a plurality of 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 capacitive voltage divider.

[0036] Preferably, the knife switch insulating housing 201a is connected to the housing of the knife switch operating mechanism 24a through the knife switch flange member 27a.

[0037] Preferably, the knife-switch insulating housing 201a has an L-shaped structure, including a knife-switch insulating housing cross arm and a knife-switch insulating housing vertical arm. One end of the knife-switch insulating housing cross arm is a knife-switch plug 2011a, and the other end is provided with a knife-switch socket 2010a and is bent and connected to one end of the knife-switch insulating housing vertical arm. The other end of the knife-switch insulating housing vertical arm is connected to the housing of the knife-switch operating mechanism 24a; the knife-switch static contact 21a, the knife-switch moving contact 22a, the knife-switch drive shaft 23a, and the knife-switch insulating core 25a are all arranged in the middle of the knife-switch insulating housing vertical arm.

[0038] Preferably, the plug-in type fully shielded voltage sensor 3a includes a sensor connection assembly 30a, a sensor transition conductor 31a, a sensor insulator 32a, a sensor insulating core 33a, and a sensor flange 34a; the sensor connection assembly 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, and 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 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 arranged at the other end of the sensor insulating housing 301a and is connected to the other end of the sensor insulator 32a.

[0039] Preferably, the sensor insulating core 33a includes a group of capacitor screens embedded therein and arranged alternately with insulating layers, with the inner diameter gradually increasing along the axis and sequentially sleeved. The capacitor screens of this group of capacitor screens are offset from the inside to the outside and from the sensor transition conductor 31a towards the direction where the sensor flange 34a is located in sequence.

[0040] Preferably, the capacitor screen group in the sensor insulating core 33a 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 capacitive voltage divider.

[0041] Preferably, the sensor insulating housing 301a has 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 3011a, and the other end is provided with a sensor socket 3010a and 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 arranged in the middle of the sensor insulating housing vertical arm.

[0042] 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 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 first connector conductor 1-20 for covering the first connector conductor 1-20 and forming a first connector slot 1-22, and the inner semi-conductive layer is in contact with the first connector conductor 1-20.

[0043] Preferably, both the third insulating housing 51 and the fourth insulating housing 61 include a prefabricated rubber insulating layer, an epoxy resin insulating member disposed within 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 inner semi-conductive layers of the third insulating housing 51 and the fourth insulating housing 61 are in contact with the third connector conductor 50 and the fourth connector conductor 60 respectively.

[0044] The present invention also provides a substation, which includes the novel integrated combined electrical apparatus of the present invention as described above.

[0045] Preferably, the substation further includes a transformer 1c, the transformer 1c includes a transformer input terminal 10c and a transformer output terminal 11c. The transformer input terminal 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 connector 6 of a group of novel integrated combined electrical apparatuses, the transformer output terminal 11c is connected to one end of a low-voltage bus 5c through a low-voltage elbow joint 4c, and the other end of the low-voltage bus 5c is connected to the third connector 5 of another group of novel integrated combined electrical apparatuses;

[0046] Preferably, the substation further includes a substation housing 1h. 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 two groups of novel integrated combined electrical apparatuses are all disposed within the substation housing 1h, and lifting rings for lifting the substation are provided at both ends of the bottom plate of the substation housing 1h.

[0047] For 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 interconnected. Compared with the existing air-insulated combined electrical apparatus and GIS combined electrical apparatus, there is no need to fill insulating gas, significantly reducing the overall volume and facilitating the improvement of the assembly efficiency. The novel integrated combined electrical apparatus can replace the existing GIS combined electrical apparatus and the existing switchgear, and is a brand-new and pioneering combined electrical apparatus.

[0048] In addition, for the novel integrated combined electrical apparatus of the present invention, its first connector, third connector, and fourth connector improve the convenience of function expansion of the combined electrical apparatus.

[0049] The substation of the present invention includes the novel integrated combined electrical apparatus. The novel integrated combined electrical apparatus on the input side of the transformer can replace the existing GIS combined electrical apparatus without filling any gas, and has a small volume and less floor area. The novel integrated combined electrical apparatus on the output side of the transformer can replace the existing switchgear, eliminating the need for a low-voltage switchgear, completely changing the construction method of the existing substation, and greatly reducing the construction difficulty of the substation.

[0050] In addition, as a mobile substation, the substation of the present invention can significantly reduce the volume and self-weight of the mobile substation, and significantly improve the mobility of the mobile substation. Brief Description of the Drawings

[0051] Figure 1 is a schematic structural diagram of the novel integrated combined electrical apparatus of the present invention;

[0052] Figure 2A is a schematic structural diagram of the first embodiment of the plug-in fully shielded lightning arrester of the present invention;

[0053] Figure 2B is a schematic structural diagram of the second embodiment of the plug-in fully shielded lightning arrester of the present invention;

[0054] Figure 3A is a schematic structural diagram of the first embodiment of the plug-in fully shielded earthing switch of the present invention;

[0055] Figure 3B is a schematic structural diagram of the second embodiment of the plug-in fully shielded earthing switch of the present invention;

[0056] Figure 4A is a schematic structural diagram of the first embodiment of the plug-in fully shielded voltage sensor of the present invention;

[0057] Figure 4B is a schematic structural diagram of the second embodiment of the plug-in fully shielded voltage sensor of the present invention;

[0058] Figure 5 is a schematic structural diagram of the mobile substation of the present invention;

[0059] Figure 6 is of the present invention Figure 5 amplified schematic structural diagram of part A;

[0060] Figure 7 is another embodiment of the connection between the second connector and the breaker support bushing. Detailed Description of the Invention

[0061] The following, in combination with the Figures 1 - 4B embodiments given, further illustrate the specific embodiments of the novel integrated combined electrical apparatus of the present invention. The novel integrated combined electrical apparatus of the present invention is not limited to the descriptions of the following embodiments.

[0062] 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 around the outside of the first conductor 10, and both ends of the first bushing 1 are a first bushing inner end and a first bushing outer end respectively, 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, and both ends of the second bushing 3 are a second bushing inner end and a second bushing outer end respectively, 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 moving contact and a 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 in the circuit breaker insulating core 23, and the circuit 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 respectively cooperates 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 respectively cooperates with the circuit breaker insulating core 23 and the second insulating core 31; 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.

[0063] For the novel integrated combined electrical apparatus of the present invention, the first bushing 1, the first connector 1-2, the circuit 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 combined electrical apparatus and GIS combined electrical apparatus, there is no need to fill insulating gas, thus significantly reducing the overall volume and being beneficial to improving the assembly efficiency.

[0064] 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 bushing 1 is connected to an input cable through the third connector 5, and the second bushing 3 is connected to an 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 plug-connected to the plug-in type fully shielded lightning arrester 1a and / or the plug-in type fully shielded earthing switch 2a and / or the plug-in type 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.

[0065] 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.

[0066] As Figure 1 shown, 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 around the outside of 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 around the outside of 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 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 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.

[0067] Preferably, as Figure 1 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 interrupter 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, and 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 the two ends are respectively connected to the housings of the second connector 2-3 and the circuit breaker operating mechanism 24. Further, as Figure 1As shown, the second conductor 30 is a flexible conductor, one end of which extends into the second insulating housing 2-30 and is electrically connected to the moving contact conductor 21. The breaker support bushing 26 is an insulator from high voltage to ground potential. In this embodiment, an insulator cast with epoxy resin is used, and fiberglass materials can be embedded according to needs to increase rigidity, and insulating layers and capacitor screens can be alternately embedded in the insulator.

[0068] Preferably, as Figure 1 shown, the first connector 1-2 further includes a first connector conductor 1-20 disposed in the first insulating housing 1-21 and electrically connected to the first conductor 10 at one end; the first insulating housing 1-21 is a tee joint for connecting to the plug-in full-screen lightning arrester 1a or the plug-in full-screen grounding switch 2a or the plug-in full-screen voltage sensor 3a. Of course, when it is not connected to the plug-in full-screen lightning arrester 1a or the plug-in full-screen grounding switch 2a or the plug-in full-screen voltage sensor 3a, it can also be a straight or L-shaped two-way joint. The first insulating housing 1-21 includes 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, and the other end of the first insulating housing vertical arm is connected to one end of the breaker insulating core 23 and sleeved outside one end of the breaker insulating core 23. One end of the first insulating housing cross arm is connected to one end of the first insulating core 11. Further, the other end of the first insulating housing vertical arm is sleeved outside one end of the breaker insulating core 23, and one end of the first insulating housing 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 housing cross arm, and one end of the plug-in full-screen lightning arrester 1a or the plug-in full-screen grounding switch 2a or the plug-in full-screen 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.

[0069] Preferably, the first insulating housing 1-21 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 provided corresponding to the first connector conductor 1-20 for covering the first connector conductor 1-20 and forming the first connector slot 1-22. The inner semi-conductive layer is in contact with the first connector conductor 1-20, and the outer semi-conductive layer is 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 insulating core 11 and the breaker insulating core 23 at both ends.

[0070] Preferably, as Figure 1As shown, the second insulating housing 2-30 has a tee 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 provided therein. The second connector T-shaped hole 2-31 includes a second connector vertical hole provided in the second insulating housing vertical arm and a second connector horizontal hole provided 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 joint (the connection part is a tapered protrusion). Of course, an external tee joint (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, at the connection between the second insulating housing 2-30 and the circuit breaker support bushing 26, and at 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 , for another embodiment of the connection between the second connector 2-3 and the circuit breaker support bushing 26. The second insulating housing 2-30 is a cast epoxy resin tee joint, which adopts an external tee joint. The connection part is a tapered groove, and the connection part of the circuit breaker support bushing 26 connected to the second insulating housing 2-30 is a tapered protrusion. Insulating glue is filled between them, and the second connector 2-3 and the circuit breaker support bushing 26 are fixedly connected by a flange. Preferably, the circuit breaker support bushing 26 includes a group of capacitor screens 261 embedded therein and arranged alternately with insulating layers, with an inner diameter gradually increasing and nested in sequence.

[0071] 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 circuit breaker insulating core 23.

[0072] Furthermore, as Figure 1As shown, the first insulating core 11 of the first sleeve 1 is a capacitive insulating core, which includes a group of capacitor screens embedded therein and arranged alternately with the insulating layer, with gradually increasing inner diameters and stacked in sequence. This group of capacitor screens includes n1 capacitor screens, where n1 is an integer greater than or equal to 2. Through this group of capacitor screens, the high voltage in the first conductor 10 is gradually divided and insulated, improving the electric field distribution. Further, 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 capacitive 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 capacitor screens that are insulated from each other and stacked in sequence along the axial direction from the outer end to the inner end of the first sleeve can also be provided to form a shielding capacitor to shield external signal interference.

[0073] The breaker insulating core 23 of the breaker 2 is a capacitive insulating core, which includes one or more groups of capacitor screens embedded in the breaker insulating core 23 and arranged axially. Each group of capacitor screens includes multiple capacitor screens arranged alternately with the insulating layer, with gradually increasing inner diameters and stacked in sequence for insulation protection. As Figure 1 shown in the embodiment, it is preferred that the breaker insulating core 23 includes two groups of capacitor screens respectively embedded at both ends thereof. Each group of capacitor screens includes multiple capacitor screens arranged alternately with the insulating layer, with gradually increasing inner diameters and stacked in sequence. The two groups of capacitor screens respectively surround the flanges at both ends of the vacuum interrupter 20, and each capacitor screen of the two groups 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 group of capacitor screens near the first connector 1-2 at one end in the breaker insulating core 23, the capacitor screens gradually shift towards the end near the breaker operating mechanism 24 from the inside to the outside, while among the multiple capacitor screens of the other group of capacitor screens near the breaker operating mechanism 24 at the other end, 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 method of the two groups of capacitor screens can be adjusted according to different usage conditions. Further, outside the two groups of capacitor screens, there are also n2 common capacitor screens arranged alternately with the insulating layer, with gradually increasing diameters and stacked in sequence. n2 is an integer greater than or equal to 1, and n2 is preferably 2. In addition, according to needs, the multiple capacitor screens of each group of capacitor screens in the breaker insulating core 23 can also be formed into a series-connected insulating capacitor C1 and a voltage-dividing capacitor C2 to form a capacitive voltage divider, serving as a potential transformer PT1. The method is similar to that of the potential transformer PT0 in the first insulating core 11 and will not be elaborated here.

[0074] The second insulating core 31 of the second sleeve 3 is a capacitive insulating core, which includes a plurality of capacitor screens embedded therein and arranged alternately with the insulating layer, with gradually increasing inner diameters and nested in sequence. Similar to the first insulating core 11, the plurality of capacitor screens can also be used to form a potential transformer PT. In this embodiment, the difference between the second insulating core 31 and the first insulating core 11 is that the inside of the second insulating core 31 is a cavity for the flexible conductor of the second conductor 30 to pass through, while the first insulating core 11 tightly wraps around the first conductor 10. Specifically, as Figure 1 shown in the direction, the left end and the right end of the first sleeve 1 are the inner end and the outer end of the first sleeve respectively, and the left end and the right end of the second sleeve 3 are the inner end and the outer end of the second sleeve respectively; 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, so that there is no need to fill insulating gases such as air and sulfur hexafluoride, and thus the volume of the combined electrical apparatus is greatly reduced.

[0075] 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 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.

[0076] Preferably, as Figure 1 shown in the figure, the third connector 5 includes a third insulating housing 51 and a third connector conductor 50 disposed inside 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. Further, as Figure 1 shown in the figure, the third insulating housing 51 is 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. Further, as Figure 1 shown in the figure, the first bushing 1 further includes a first bushing 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 bushing support housing 12 is sleeved on 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 bushing support housing 12. The first bushing support housing 12 is an insulating support member. In this embodiment, the first bushing support housing 12 is an epoxy resin insulating member embedded with fiberglass material.

[0077] The third insulating housing 51 includes a prefabricated rubber insulating layer, an epoxy resin insulating member disposed inside 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 earthing. 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 bushing and forming the third insulating housing vertical arm for covering the incoming power cable or busbar.

[0078] In this embodiment, the third insulating shell 51 has an L-shaped structure, which is convenient for arranging 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 shell 51 may also be in a straight shape, an L shape or other structures.

[0079] Preferably, as Figure 1 shown, the fourth connector 6 includes a fourth insulating shell 61 and a fourth connector conductor 60 disposed within the fourth insulating shell 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 shell 61 is sleeved outside the outer end of the second sleeve. Further, as Figure 1 shown, a fourth connector slot is provided at the other end of the fourth insulating shell 61. An external power output cable or busbar is inserted into the fourth connector slot to be electrically connected to the fourth connector conductor 60. Further, as Figure 1 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.

[0080] 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.

[0081] 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 disposed within 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 provided corresponding to the fourth connector conductor 60 for wrapping the fourth connector conductor 60 and forming the 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 to a straight shape, an L shape or other shapes according to needs.

[0082] Specifically, as Figure 1In the shown direction, the left end of the cross arm of the third insulating shell is sleeved outside the first sleeve support shell 12, the right end of the cross arm of the third insulating shell is provided with a third connector slot, and the lower end of the vertical arm of the third insulating shell is bent and connected to the right end of the cross arm of the third insulating shell; 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.

[0083] 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 requirements, 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, can also be directly buried underground, or can be placed underwater, and is suitable for various usage environments.

[0084] As Figure 2A shown, it is the first embodiment of the plug-in type fully shielded lightning arrester 1a.

[0085] As Figure 2A shown, the plug-in type 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 matched 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 arranged inside the lightning arrester plug 1011a, one end is electrically connected to the lightning arrester valve plate group 12a, and the other end is 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 arranged inside 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 arranged at the other end of the lightning arrester insulating shell 101a.

[0086] Further, as Figure 2A shown, the plug-in type fully shielded lightning arrester 1a further includes a lightning arrester transition conductor 11a arranged inside 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. Further, as Figure 2AAs shown, the arrester insulation housing 101a has an L-shaped structure, including an arrester insulation housing cross arm and an arrester insulation housing vertical arm. One end of the arrester insulation housing cross arm is the arrester plug 1011a, and the other end is bent and connected to one end of the arrester insulation housing vertical arm. The other end of the arrester insulation housing vertical arm is connected to the arrester flange 15a. The arrester transition conductor 11a, the arrester insulation core 13a, and the arrester valve disc group 12a are arranged in the middle of the arrester insulation housing vertical arm.

[0087] Preferably, as Figure 2A shown, the arrester insulation core 13a includes a group of capacitor screens embedded therein and arranged alternately with the insulating layer, with gradually increasing diameters and nested in sequence. The capacitor screens of this group are offset from the inside to the outside and along the axial direction from one end close to the arrester connection conductor 100a to the end close to the arrester flange 15a. Further, as Figure 2A shown, the plug-in fully shielded arrester 1a further includes an arrester valve disc lead wire 17a and an arrester capacitor voltage dividing lead wire 16a. The two arrester valve disc lead wires 17a are respectively electrically connected to the two ends of an arrester valve disc away from the arrester connection conductor 100a in the arrester valve disc group 12a, one is grounded, and the other is used as a voltage dividing signal. One of the arrester valve discs away from the arrester connection conductor 100a in the arrester valve disc group 12a serves as a valve disc voltage dividing capacitor, and the other arrester valve discs serve as valve disc main capacitors. The valve disc main capacitors and the valve disc voltage dividing capacitor form a capacitor voltage divider to output a signal. The capacitor screen group in the arrester insulation core 13a 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 arrester capacitor voltage dividing lead wire 16a is connected to the capacitor voltage divider. The two arrester capacitor voltage dividing lead wires 16a, one is connected to the outermost capacitor screen for grounding, and the other is electrically connected to the n3rd capacitor screen from the outside in the capacitor screen group in the arrester insulation core 13a, where n3 is an integer greater than or equal to 2. Further, n3 is preferably 2. It should be noted that the arrester valve disc lead wire 17a and the arrester capacitor voltage dividing lead wire 16a are used to output detection signals. Of course, as a degraded scheme, only a grounding lead can be set, without setting a capacitor voltage divider and the corresponding voltage dividing signal lines, and no detection signals are output.

[0088] Specifically, as Figure 2AAs shown in the figure, the left end of the cross arm of the arrester insulation shell is the arrester plug 1011a, and the right end is provided with an arrester slot 1011a and is bent and connected to the upper end of the vertical arm of the arrester insulation shell. The left end of the arrester connection conductor 100a protrudes outside the arrester plug 1011a, and the right end is connected to the upper end of the arrester transition conductor 11a through a fastening screw 14a. The lower end of the arrester transition conductor 11a is connected to the upper end of the arrester valve plate group 12a. The arrester flange 15a is arranged at the lower end of the vertical arm of the arrester insulation shell and is connected to the lower end of the arrester valve plate group 12a. The arrester valve plate lead-out wire 17a is connected to the upper and lower ends of the lowermost arrester valve plate. The capacitive screens of the arrester insulation core 13a are sequentially offset downward from the upper end of the vertical arm of the arrester insulation shell to the lower end of the vertical arm of the arrester insulation shell. The arrester slot 1010a provided at the right end of the cross arm of the arrester insulation shell is used for continued plugging and matching with other devices, such as connecting a plug-in type fully shielded earthing switch 2a or a plug-in type 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 arrester insulation shell is a closed arrester insulation shell.

[0089] As Figure 2B shown, it is the second embodiment of the plug-in type fully shielded arrester 1a.

[0090] The difference between this embodiment and the first embodiment is that arrestor slots 1010a are provided at both ends of the cross arm of the arrestor insulation shell.

[0091] 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 matchable with the plug-in type fully shielded arrester 1a of the second embodiment.

[0092] As Figure 3A shown, it is the first embodiment of the plug-in type fully shielded earthing switch 2a.

[0093] As Figure 3AAs shown, the pluggable fully shielded grounding knife switch 2a includes a knife switch connection assembly 20a, a knife switch static contact 21a, a knife switch moving contact 22a, a knife switch drive shaft 23a, a knife switch operating mechanism 24a, and a knife switch insulating core 25a; the knife switch connection assembly 20a includes a knife switch insulating housing 201a and a knife switch connection conductor 200a. One end of the knife switch insulating housing 201a is a knife switch plug 2011a that is inserted and matched 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 knife switch connection conductor 200a is arranged inside the knife switch plug 2011a. The knife switch static contact 21a and the knife switch moving contact 22a are oppositely arranged inside the knife switch insulating housing 201a. One end of the knife switch static contact 21a is electrically connected to the knife switch connection conductor 200a, and the other end is matched with one end of the knife switch moving contact 22a. The other end of the knife switch moving contact 22a is connected to the knife switch operating mechanism 24a through the knife switch drive shaft 23a. The knife switch insulating core 25a wraps around the outside of the knife switch moving contact 22a and the knife switch drive shaft 23a and is located between the knife switch moving contact 22a and the knife switch insulating housing 201a. The other end of the knife switch insulating housing 201a is connected to the housing of the knife switch operating mechanism 24a. Further, as Figure 3A shown, the knife switch insulating housing 201a is connected to the housing of the knife switch operating mechanism 24a through a knife switch flange 27a. Further, as Figure 3A shown, the knife switch insulating housing 201a is of an L-shaped structure, including a knife switch insulating housing cross arm and a knife switch insulating housing vertical arm. One end of the knife switch insulating housing cross arm is the knife switch plug 2011a, and the other end is bent and connected to one end of the knife switch insulating housing vertical arm. The other end of the knife switch insulating housing vertical arm is connected to the housing of the knife switch operating mechanism 24a; the knife switch static contact 21a, the knife switch moving contact 22a, the knife switch drive shaft 23a, and the knife switch insulating core 25a are all arranged in the middle of the knife switch insulating housing vertical arm. Further, a knife switch slot 2010a is provided at the end where the knife switch insulating housing cross arm is connected to the knife switch insulating housing vertical arm for connecting other pluggable components or accessing incoming and outgoing cables or busbars, such as connecting a pluggable fully shielded lightning arrester 1a or a pluggable fully shielded voltage sensor 3a. Of course, the knife switch slot 2010a may not be provided, and the right end of the knife switch insulating housing cross arm is a closed knife switch insulating housing.

[0094] Preferably, as Figure 3A shown, the knife switch insulating core 25a includes a group of capacitor screens embedded therein and arranged alternately with insulating layers, with gradually increasing diameters and sequentially nested. The capacitor screens of this group of capacitor screens are offset sequentially from the inside to the outside and along the axial direction from the end where the knife switch static contact 21a and the knife switch moving contact 22a are matched towards the end close to the knife switch operating mechanism 24a. Further, as Figure 3AAs shown, the pluggable fully shielded grounding knife switch 2a further includes a knife switch capacitive voltage division lead-out wire 26a. The capacitive screen group in the knife switch insulating core 25a can form a capacitive voltage divider. This group of capacitive screens includes an insulating capacitor C1 composed of multiple inner capacitive screens, and a voltage-dividing capacitor C2 composed of multiple capacitive screens located outside the insulating capacitor C1. The insulating capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitive voltage divider. Adopting a scheme similar to that of the first bushing 1, the knife switch capacitive voltage division lead-out wire 26a is connected to the capacitive voltage divider. There are two knife switch capacitive voltage division lead-out wires 26a. One is connected to the outermost capacitive screen for grounding, and the other is electrically connected to the n4th capacitive screen (i.e., the capacitive screen at the connection of the insulating capacitor C1 and the voltage-dividing capacitor C2) of the outermost side of the capacitive screen group embedded in the knife switch insulating core 25a. 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 capacitive voltage divider and only rely on the capacitive screen group for voltage division insulation without outputting detection signals.

[0095] Specifically, as Figure 3A shown in the direction, the left end of the cross arm of the knife switch insulating housing is a knife switch plug 2011a, and the right end is provided with a knife switch socket 2010a and is connected to the upper end of the vertical arm of the knife switch insulating housing. The lower end of the vertical arm of the knife switch insulating housing is connected to the housing of the knife switch operating mechanism 24a through a knife switch flange 27a; the left end of the knife switch connecting conductor 200a protrudes outside the knife switch plug 2011a and is connected to the upper end of the knife switch static contact 21a. The lower end of the knife switch static contact 21a cooperates with the upper end of the knife switch moving contact 22a. The lower end of the knife switch moving contact 22a is connected to the knife switch operating mechanism 24a through a knife switch drive shaft 23a. The knife switch insulating core 25a is sleeved outside 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 housing; the capacitive screens embedded in the knife switch insulating core 25a are offset in sequence from the inside to the outside and along the axis from the upper end to the lower end of the vertical arm of the knife switch insulating housing. The knife switch capacitive voltage division lead-out wire 26a is electrically connected to the outermost two capacitive screens of the capacitive screen group.

[0096] As Figure 3B shown, it is the second embodiment of the pluggable fully shielded grounding knife switch 2a.

[0097] The difference between this embodiment and the first embodiment is that knife switch sockets 3010a are provided at both ends of the cross arm of the knife switch insulating housing.

[0098] 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 grounding knife switch 2a of the second embodiment.

[0099] As Figure 4AAs shown, it is the first embodiment of the pluggable fully shielded voltage sensor.

[0100] As Figure 4A shown, the pluggable fully shielded voltage sensor includes a sensor connection assembly 30a, a sensor transition conductor 31a, a sensor insulator 32a, a sensor insulating core 33a, and a sensor flange 34a; the sensor connection assembly 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 is electrically connected to the first connector 1-2, the third connector 5, or the fourth connector 6 at one end. 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.

[0101] Preferably, as Figure 4A shown, the sensor insulating core 33a includes a group of capacitor screens that are embedded therein and arranged alternately with an insulating layer, have an increasing inner diameter, 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 axis from the inside to the outside and in sequence. Further, as Figure 4AAs shown in the figure, 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.

[0102] Specifically, as Figure 4A shown in the figure, 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 connecting 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.

[0103] As Figure 4B shown in the figure, it is the second embodiment of the pluggable fully shielded voltage sensor 3a.

[0104] 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.

[0105] 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.

[0106] 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 alternately winding an insulating layer made of glass fiber material impregnated with epoxy resin, insulating paper or other insulating materials, and a semi-conductive tape or metal tape as a 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. This structure makes the outer shell of the novel integrated electrical apparatus of the present invention at ground potential as a whole, thus greatly improving the electrical safety of users.

[0107] 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 material. As Figure 5 shown, the present invention also discloses a substation, which includes the novel integrated electrical apparatus.

[0108] 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.

[0109] The substation of the present invention includes the novel integrated electrical apparatus. The novel integrated electrical apparatus on the input side of the transformer can replace the existing GIS integrated electrical apparatus without filling any gas, with small volume and less floor area. The novel integrated electrical apparatus on the output side of the transformer can replace the existing switchgear, eliminating the need to set up low-voltage switchgear, 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 here are relative concepts. For example, the input side of the transformer is 110KV high voltage, and the output side is 35KV high voltage. The corresponding novel integrated electrical apparatus is configured according to the matching high voltage. The substation outer shell 1h can be not provided, just for the convenience of management and installation.

[0110] Further, as Figure 5 shown, the substation is a movable substation, including a substation housing 1h. Hoisting rings for hoisting 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.

[0111] 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 connection head 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 connection head slot 1-22 of the first connection head 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 sequentially. As Figure 6 shown, the third connection head 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 sequentially. The fourth connection head 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.

[0112] The high-voltage elbow joint 3c and the low-voltage elbow joint 4c can adopt existing European or American cable joints. Additionally, as a degraded solution, only one group of novel integrated combined electrical apparatuses can be provided 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 provided, and the existing low-voltage switchgear or GIS combined electrical apparatus is still used on the other side of the transformer.

[0113] Further, the first connection head 1-2, the third connection head 5, and the fourth connection head 6 all include insulating plugs, and the insulating plugs are matched with the first connection head slot 1-22, the third connection head slot, and the fourth connection head slot.

[0114] 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 be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A novel integrated combined electrical apparatus, characterized in that, it 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 bushing inner end and a first bushing outer end. 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 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 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 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 in the circuit breaker insulating core (23). 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) 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 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).

2. The novel integrated combined electrical apparatus according to claim 1, characterized in that: The novel integrated combined electrical apparatus further includes a third connector (5) and a fourth connector (6). The first bushing (1) is connected to the incoming power cable through the third connector (5), and the second bushing (3) is connected to the outgoing power cable through the fourth connector (6).

3. The novel integrated combined electrical apparatus according to claim 2, characterized in that: The novel integrated combined electrical apparatus further includes one or more 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 plug-in type fully shielded lightning arrester (1a) and / or the plug-in type fully shielded earthing switch (2a) and / or the plug-in type fully shielded voltage sensor (3a) are inserted on the first connector (1-2) and / or the third connector (5) and / or the fourth connector (6).

4. The novel integrated combined electrical apparatus according to claim 1, characterized in that: The first connector (1-2) further includes a first connector conductor (1-20) disposed in the first insulating housing (1-21) and electrically connected to the first conductor (10) at one end; the first insulating housing (1-21) is of a tee 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, and the other end of the first insulating housing vertical arm is connected to one end of the circuit breaker insulating core body (23). One end of the first insulating housing cross arm is connected to one end of the first insulating core body (11), and a first connector slot (1-22) is provided at the other end of the first insulating housing cross arm.

5. The novel integrated combined electrical apparatus according to claim 1, characterized in that: The second insulating housing (2-30) is of a tee structure, including a second insulating housing vertical arm and a second insulating housing cross arm. One end of the second insulating housing cross 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) provided therein. The second connector T-shaped hole (2-31) includes a second connector vertical hole provided in the second insulating housing vertical arm and a second connector horizontal hole provided in the second insulating housing cross 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).

6. The novel integrated combined electrical apparatus according to claim 2, characterized in that: The third connector (5) includes a third insulating housing (51) and a third connector conductor (50) disposed in 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 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 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.

7. The novel integrated combined electrical apparatus according to claim 6, characterized in that: 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 a third connector slot is provided at the other end 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).

8. The novel integrated combined electrical apparatus according to claim 6, characterized in that: A fourth connector slot is provided at the other end of the fourth insulating housing (61), 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).

9. The novel integrated combined electrical apparatus according to claim 1, characterized in that: An insulating adhesive is filled at the connection between the second insulating shell (2-30) and the circuit breaker insulating core body (23), and an insulating adhesive is filled at the connection between the second insulating shell (2-30) and the second insulating core body (31).

10. The novel integrated combined electrical apparatus according to claim 1, characterized in that: The circuit breaker (2) further includes a moving contact conductor (21) and a static contact conductor (22). 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), and the moving contact of the circuit breaker is also connected to the operating mechanism pull rod (25) through the moving contact conductor (21).

11. The novel integrated combined electrical apparatus according to claim 10, characterized in that: 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; the second conductor (30) is a flexible conductor, and one end of it is inserted into the second insulating shell (2-30) and electrically connected to the moving contact conductor (21).

12. The novel integrated combined electrical apparatus according to claim 11, characterized in that: 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. An insulating adhesive is filled at the connection between the circuit breaker support bushing (26) and the second connector (2-3).

13. The novel integrated combined electrical apparatus according to claim 1, characterized in that: The novel integrated combined electrical apparatus further includes a current transformer CT0 sleeved outside the first bushing (1) and / or a current transformer CT1 sleeved outside the circuit breaker insulating core body (23).

14. The novel integrated combined electrical apparatus according to claim 6, characterized in that: The first bushing (1) further includes a first bushing support shell (12) sleeved outside the first insulating core body (11), and the third insulating shell (51) is wrapped outside the first bushing support shell (12); the second bushing (3) further includes a second bushing support shell (32) sleeved outside the second insulating core body (31), and the fourth insulating shell (61) is wrapped outside the second insulating core body (31).

15. The novel integrated combined electrical apparatus according to claim 1 or 14, characterized in that: The first insulating core body (11) includes a group of capacitor screens embedded therein and arranged alternately with insulating layers, with gradually increasing inner diameters and sequentially nested. This group of capacitor screens includes n1 capacitor screens, and n1 is an integer greater than or equal to 2.

16. The novel integrated combined electrical apparatus according to claim 15, characterized in that: This group of capacitor screens in the first insulating core body (11) includes an insulating capacitor C1 composed of multiple 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 capacitive voltage divider, serving as a potential transformer PT0.

17. The novel integrated combined electrical apparatus according to claim 1, characterized in that: it includes one or more groups of capacitor screens axially arranged in the breaker insulating core (23), and each group of capacitor screens includes multiple capacitor screens alternately arranged with insulating layers, with gradually increasing inner diameters and sequentially sleeved.

18. The novel integrated combined electrical apparatus according to claim 17, characterized in that: the breaker insulating core (23) includes two groups of capacitor screens respectively embedded at both ends thereof, the two groups of capacitor screens respectively surround the flanges at both ends of the vacuum interrupter (20), each group of capacitor screens includes multiple capacitor screens alternately arranged with insulating layers, with gradually increasing inner diameters and sequentially sleeved, and each capacitor screen of the two groups of capacitor screens respectively surrounds the corresponding flange.

19. The novel integrated combined electrical apparatus according to claim 17, characterized in that: multiple capacitor screens of each group of capacitor screens form a series-connected insulating capacitor C1 and a voltage-dividing capacitor C2, constituting a capacitive voltage divider as the potential transformer PT1.

20. The novel integrated combined electrical apparatus according to claim 3, characterized in that: the plug-in fully shielded lightning arrester (1a) includes a lightning arrester connection assembly (10a), a lightning arrester varistor group (12a), a lightning arrester insulating core (13a) and a lightning arrester flange member (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 plug-in lightning arrester plug (1011a) for mating, the lightning arrester connection conductor (100a) is arranged in the lightning arrester plug (1011a), one end is electrically connected to the lightning arrester varistor group (12a), the lightning arrester varistor group (12a) is arranged in the lightning arrester insulating shell (101a), the lightning arrester insulating core (13a) is sleeved outside the lightning arrester varistor group (12a) and is located between the lightning arrester varistor group (12a) and the lightning arrester insulating shell (101a), and the lightning arrester flange member (15a) is arranged at the other end of the lightning arrester insulating shell (101a).

21. The novel integrated combined electrical apparatus according to claim 20, characterized in that: the plug-in fully shielded lightning arrester (1a) further includes a lightning arrester transition conductor (11a) arranged in the lightning arrester insulating shell (101a) and located between the lightning arrester connection conductor (100a) and the lightning arrester varistor 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 varistor group (12a).

22. The novel integrated combined electrical apparatus according to claim 20, characterized in that: 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 sleeved, and the capacitor screens of this group of capacitor screens are sequentially offset from the inside to the outside and axially from one end close to the lightning arrester connection conductor (100a) to the direction of one end close to the lightning arrester flange member (15a).

23. The novel integrated combined electrical apparatus according to claim 22, characterized in that: In the arrester varistor group (12a), one varistor away from the arrester connection conductor (100a) serves as the varistor voltage-dividing capacitor, and the other varistors serve as the main varistor capacitors. The main varistor capacitors and the varistor voltage-dividing capacitor form a capacitive voltage divider. The capacitive screen group in the arrester insulating core (13a) includes an insulating capacitor C1 formed by multiple inner capacitive screens and a voltage-dividing capacitor C2 formed by multiple capacitive screens located outside the insulating capacitor C1. The insulating capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form another capacitive voltage divider.

24. The novel integrated combined electrical apparatus according to claim 21, characterized in that: the arrester insulating housing (101a) has an L-shaped structure, including an arrester insulating housing cross arm and an arrester insulating housing vertical arm. One end of the arrester insulating housing cross arm is an arrester plug (1011a), and the other end is provided with an arrester slot (1010a) and is bent and connected to one end of the arrester insulating housing vertical arm. The other end of the arrester insulating housing vertical arm is connected to the arrester flange member (15a). The arrester transition conductor (11a), the arrester insulating core (13a), and the arrester varistor group (12a) are arranged in the middle of the arrester insulating housing vertical arm.

25. The novel integrated combined electrical apparatus according to claim 3, characterized in that: the pluggable fully shielded earthing switch (2a) includes a switch connecting assembly (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 assembly (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), and 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 matched 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 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).

26. The novel integrated combined electrical apparatus according to claim 25, characterized in that: the switch insulating core (25a) includes a group of capacitive screens embedded therein and arranged alternately with insulating layers, with gradually increasing diameters and nested in sequence. The capacitive screens of this group of capacitive screens are offset in sequence from the end where the switch static contact (21a) and the switch moving contact (22a) are matched towards the end close to the switch operating mechanism (24a) from the inside to the outside and along the axial direction.

27. The novel integrated combined electrical apparatus according to claim 26, characterized in that: The capacitor screen group in the knife-switch insulating core body (25a) includes an insulating capacitor C1 composed of a plurality of inner capacitor screens, and a voltage-dividing capacitor C2 composed of a plurality of 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 capacitive voltage divider.

28. The novel integrated combined electrical apparatus according to claim 25, characterized in that: The knife-switch insulating housing (201a) is connected to the housing of the knife-switch operating mechanism (24a) through a knife-switch flange member (27a).

29. The novel integrated combined electrical apparatus according to claim 25, characterized in that: The knife-switch insulating housing (201a) has an L-shaped structure, including a knife-switch insulating housing cross arm and a knife-switch insulating housing vertical arm. One end of the knife-switch insulating housing cross arm is a knife-switch plug (2011a), and the other end is provided with a knife-switch slot (2010a) and is bent and connected to one end of the knife-switch insulating housing vertical arm. The other end of the knife-switch insulating housing vertical arm is connected to the housing of the knife-switch operating mechanism (24a); the knife-switch static contact (21a), the knife-switch moving contact 22a, the knife-switch driving shaft (23a), and the knife-switch insulating core body (25a) are all arranged in the middle of the knife-switch insulating housing vertical arm.

30. The novel integrated combined electrical apparatus according to claim 3, characterized in that: The plug-in full-shielded voltage sensor (3a) includes a sensor connection assembly (30a), a sensor transition conductor (31a), a sensor insulator (32a), a sensor insulating core body (33a), and a sensor flange member (34a); The sensor connection assembly (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), and 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 body (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 member (34a) is arranged at the other end of the sensor insulating housing (301a) and is connected to the other end of the sensor insulator (32a).

31. The novel integrated combined electrical apparatus according to claim 30, characterized in that: The sensor insulating core body (33a) includes a group of capacitor screens embedded therein and arranged alternately with insulating layers, with the inner diameter gradually increasing along the axis and sequentially sleeved. The capacitor screens of this group of capacitor screens are offset sequentially from the inside to the outside, from the sensor transition conductor (31a) towards the direction where the sensor flange member (34a) is located.

32. The novel integrated combined electrical apparatus according to claim 30, characterized in that: The capacitor screen group in the sensor insulating core body (33a) includes an insulating capacitor C1 composed of a plurality of inner capacitor screens, and a voltage-dividing capacitor C2 composed of a plurality of 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 capacitive voltage divider.

33. The novel integrated combined electrical apparatus according to claim 30, characterized in that: 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), and the other end is provided with a sensor slot (3010a) and 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 a sensor flange member (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.

34. The novel integrated combined electrical apparatus according to claim 4, characterized in that: the first insulating shell (1-21) includes 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 first connector conductor (1-20) for covering the first connector conductor (1-20) and forming a first connector slot (1-22), and the inner semi-conductive layer is in contact with the first connector conductor (1-20).

35. The novel integrated combined electrical apparatus according to claim 6, characterized in that: both the third insulating shell (51) and the fourth insulating shell (61) include 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 inner semi-conductive layers of the third insulating shell (51) and the fourth insulating shell (61) are respectively in contact with the third connector conductor (50) and the fourth connector conductor (60).

36. A substation, characterized in that, it includes the novel integrated combined electrical apparatus according to any one of claims 1-35.

37. The substation according to claim 36, characterized in that: the substation further includes 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 busbar (2c) through a high-voltage elbow joint (3c). The other end of the high-voltage busbar (2c) is connected to the fourth connector (6) of a group of novel integrated combined electrical apparatuses. The transformer output end (11c) is connected to one end of a low-voltage busbar (5c) through a low-voltage elbow joint (4c). The other end of the low-voltage busbar (5c) is connected to the third connector (5) of another group of novel integrated combined electrical apparatuses.

38. The substation according to claim 37, characterized in that: the substation further includes a substation housing (1h). The transformer (1c), the high-voltage elbow joint (3c), the high-voltage busbar (2c), the low-voltage elbow joint (4c), the low-voltage busbar (5c), and two groups of novel integrated combined electrical apparatuses are all arranged inside the substation housing (1h). Hoisting rings for hoisting the substation are provided at both ends of the bottom plate of the substation housing (1h).

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