Detachable three-phase main bus structure

Abstract

The utility model relates to a detachable three-phase main bus structure, which is suitable for being electrically connected between DES equipment and a circuit breaker, and comprises a main bus shell, an isolation module and a conduction module, the main bus shell is provided with a first device interface suitable for being electrically connected with DES equipment and a second device interface suitable for being electrically connected with a circuit breaker; the first device interface and the second device interface are respectively provided with an insulator, and each insulator is connected with the main bus housing in a sealed manner. The insulator at the first device interface is provided with a supporting conductor, and the insulator at the second device interface is provided with a contact seat; the isolation module and the conduction module are both located in the main bus shell; the conduction module is electrically connected with the supporting conductor and the contact seat so as to conduct a path between the DES equipment and the circuit breaker; the isolation module comprises a first shielding head and a second shielding head; the first shielding head is mounted at one end of the supporting conductor deviating from the first device interface; and the second shielding head is connected with the contact seat in a plugging manner, so that an independent fracture is formed between the circuit breaker and the DES equipment.

Description

Technical Field

[0001] This application relates to the field of 126 kV high voltage switch technology, and in particular to a detachable three-phase main busbar structure. Background Technology

[0002] In modern power systems, with the continuous growth of electricity demand, substations need to be expanded to add new equipment bays. The existing DS (Distributed Grid) and circuit breaker connections are both straight busbar structures. In traditional bay expansion schemes, to conduct withstand voltage tests on the expanded equipment, a break needs to be created between the DES and the circuit breaker before the withstand voltage test. However, due to the characteristics of the straight busbar structure, a break cannot be created; the break must be placed inside the DES, meaning the DES is in a grounded state and the DS is in a double-open state. This requires de-energizing both the upper and lower busbars to safely conduct the withstand voltage test. Such de-energizing operations not only severely impact residential electricity consumption, causing inconvenience, but also result in significant economic losses for industrial users. Summary of the Invention

[0003] In view of this, this application proposes a detachable three-phase main busbar structure, suitable for electrical connection between DES equipment and circuit breaker, including: main busbar housing, isolation module and conduction module;

[0004] The main busbar housing is provided with a first device interface for electrically connecting DES equipment and a second device interface for electrically connecting circuit breakers.

[0005] Insulators are provided at both the first device interface and the second device interface, and each insulator is sealed to the main busbar housing.

[0006] The insulator at the interface of the first device is provided with a supporting conductor, and the insulator at the interface of the second device is provided with a contact seat;

[0007] Both the isolation module and the conduction module are located inside the main busbar housing; and

[0008] The conduction module is electrically connected to the support conductor and the contact seat respectively to conduct the path between the DES equipment and the circuit breaker;

[0009] The isolation module includes: a first shield and a second shield; the first shield is installed at the end of the support conductor away from the interface of the first device; the second shield is plugged into and plugged into the contact seat to form an independent break between the circuit breaker and the DES device.

[0010] In one possible implementation, the conduction module includes a transition conductor and a contact; both ends of the transition conductor are connected to the supporting conductor and the contact respectively by fixing bolts; the end of the contact away from the transition conductor is plugged into a contact seat.

[0011] In one possible implementation, an operation window is provided on the main bus housing; the operation window is located on the side adjacent to the first device interface.

[0012] In one possible implementation, there are two operation windows; the two operation windows are set opposite each other and are coaxial.

[0013] In one possible implementation, the operation window is equipped with a cover plate.

[0014] In one possible implementation, an adsorbent and an explosion-proof device are also included; the explosion-proof device is disposed on the side of the encapsulation cover away from the main busbar housing, the adsorbent is disposed inside the main busbar housing, and one end of the adsorbent penetrates the encapsulation cover and is fixedly connected to the explosion-proof device.

[0015] Beneficial effects of this application

[0016] Under normal operating conditions, the conduction module is installed inside the main busbar housing. The support conductor and contact are electrically connected through the conduction module, thus establishing a conductive state between the DES equipment and the circuit breaker, ensuring the normal operation of the power system. When expansion and withstand voltage testing of the DES equipment are required, the conduction module is removed, and then the isolation module is installed inside the main busbar housing. The first shielding head is installed at the end of the support conductor away from the first device interface, and the second shielding head is plugged into the contact, thus establishing a circuit break between the circuit breaker and the DES equipment. At this time, the circuit breaker side is at high voltage, and the DES side is grounded, thereby achieving circuit isolation between the DES equipment and the circuit breaker. Withstand voltage testing can be safely performed without de-energizing both the upper and lower busbars.

[0017] This application, by setting up isolation and continuity modules, allows for the replacement of the continuity module with an isolation module within the main busbar housing when withstand voltage testing is required. This creates an open circuit between the DES equipment and the circuit breaker (i.e., an independent break within the main busbar structure). By replacing the traditional straight busbar structure with a detachable three-phase main busbar structure, the DES equipment can be expanded without requiring power outages on the upper and lower busbars, thus reducing the impact on residential power consumption and avoiding significant economic losses for industrial users due to power outages.

[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0020] Figure 1This is a cross-sectional view of the detachable three-phase main busbar structure of this application during a withstand voltage test;

[0021] Figure 2 This is a cross-sectional view of the detachable three-phase main busbar structure of this application during normal operation;

[0022] Figure 3 A cross-sectional view of the housing of this application is shown;

[0023] Figure 4 A cross-sectional view of the conductor supporting this application is shown;

[0024] Figure 5 A cross-sectional view of the transition conductor of this application is shown;

[0025] Figure 6 A cross-sectional view of the contact of this application is shown.

[0026] Main busbar housing—100; Operating window—101; Insulator—110; Encapsulation cover—120; Support conductor—210; First through hole—211; Second threaded hole—212; Contact—220; Third through hole—221; Transition conductor—230; Second through hole—231; Third threaded hole—232; Contact seat—240; Fixing bolt—310; Receiving groove—320; Adsorbent—410; Explosion-proof device—420; First shielding head—511; Second shielding head—521. Detailed Implementation

[0027] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0028] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0031] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0032] This application proposes a detachable three-phase main busbar structure, suitable for electrical connections between DES equipment and circuit breakers, such as... Figures 1 to 6 As shown, the system includes: a main busbar housing 100, an isolation module, and a continuity module; the main busbar housing 100 is provided with a first device interface for electrically connecting to DES equipment and a second device interface for electrically connecting to a circuit breaker; both the first and second device interfaces are provided with insulators 110, and each insulator 110 is sealed to the main busbar housing 100; the insulator 110 at the first device interface is provided with a supporting conductor 210, and the insulator 110 at the second device interface is provided with a contact seat 240; the isolation module and the continuity module are both located inside the main busbar housing 100, and the continuity module is electrically connected to the supporting conductor 210 and the contact seat 240 respectively to conduct the path between the DES equipment and the circuit breaker; the isolation module includes: a first shield head 511 and a second shield head 521; the first shield head 511 is installed at the end of the supporting conductor 210 away from the first device interface; the second shield head 521 is plugged into and detached from the contact seat 240 to form an independent break between the circuit breaker and the DES equipment.

[0033] It should be noted that the main busbar housing 100 is used to provide an installation foundation for various devices. The first device interface and the second device interface are arranged opposite each other. The first device interface is used to install DES equipment, and the second device interface is used to install circuit breakers. Insulators 110 are set at the first device interface and the second device interface, and the design of the insulators 110 being sealed to the main busbar housing 100 ensures the electrical insulation performance at the first device interface and the second device interface, while preventing external impurities, moisture, etc. from entering the interior of the main busbar housing 100. This avoids electrical conduction between the support conductor 210, the contact seat 240 and the main busbar housing 100 due to poor insulation performance. The support conductor 210 is installed on the insulator 110 at the first device interface and is used to transmit the current output by the DES equipment to the conduction module, and then to the circuit breaker. It also provides an installation position for the first shield head 511 of the isolation module. The contact seat 240 is set on the insulator 110 at the second device interface and is used to receive the current from the conduction module and transmit it to the circuit breaker. It also provides an installation position for the second shield head 521 of the isolation module.

[0034] The isolation module and the conduction module can be replaced according to actual needs to realize the electrical connection and disconnection between the DES equipment and the circuit breaker; the two ends of the conduction module are detachably connected to the support conductor 210 and the contact seat 240 respectively; when the conduction module is installed in the main bus housing 100, the support conductor 210 and the contact seat 240 are electrically connected through the conduction module, thereby forming a conduction state between the DES equipment and the circuit breaker, ensuring the normal operation of the power system; the first shield head 511 and the second shield head 521 are used to isolate the support conductor 210, the contact seat 240 and the main bus housing 100 to prevent the occurrence of arc discharge and leakage.

[0035] Under normal operating conditions, such as Figure 2 As shown, the conduction module is installed inside the main busbar housing 100. The support conductor 210 and contact seat 240 are electrically connected through the conduction module, thereby establishing a conductive state between the DES equipment and the circuit breaker to ensure the normal operation of the power system. When it is necessary to expand the DES equipment or perform withstand voltage testing, such as... Figure 1 As shown, the conduction module is disassembled, and then the isolation module is installed inside the main bus housing 100; the first shield head 511 is installed on the end of the support conductor 210 away from the first device interface, and the second shield head 521 is plugged into and disconnected from the contact seat 240, thereby forming an open circuit between the circuit breaker and the DES device; at this time, the circuit breaker side is at high voltage and the DES side is in a grounded state, thereby realizing the circuit separation between the DES device and the circuit breaker, and the withstand voltage test can be safely performed without de-energizing both the upper and lower busbars.

[0036] This application, by setting up isolation and continuity modules, allows for the replacement of the continuity module within the main busbar housing 100 with an isolation module when withstand voltage testing is required. This creates an open circuit between the DES equipment and the circuit breaker (i.e., an independent break within the main busbar structure). By replacing the traditional straight busbar structure with a detachable three-phase main busbar structure, the DES equipment can be expanded without requiring power outages on the upper and lower busbars, thus reducing the impact on residential power consumption and avoiding significant economic losses for industrial users due to power outages.

[0037] Furthermore, such as Figure 2 , Figure 4 As shown, the insulator 110 at the first device interface has a first threaded hole on its side facing the second device interface, and the corresponding support conductor 210 has a first through hole 211. The first through hole 211 and the first threaded hole are arranged opposite to each other. The fixing bolt 310 passes through the first through hole 211 and is threadedly connected to the first threaded hole on the insulator 110 at the first device interface, thereby fixing the support conductor 210 on the insulator 110 at the first device interface.

[0038] Furthermore, such as Figure 1 , Figure 4 As shown, the first shielding head 511 has a fourth through hole, and the fastening bolt passes through the fourth through hole and is threadedly connected to the second threaded hole 212 on the support conductor 210, thereby realizing the installation of the first shielding head 511 on the support conductor 210.

[0039] In one possible implementation, such as Figure 2 As shown, the conduction module includes a transition conductor 230 and a contact 220; the two ends of the transition conductor 230 are respectively connected to the supporting conductor and the contact 220 by fixing bolts 310; the end of the contact 220 away from the transition conductor 230 is plugged into and plugged into the contact seat 240.

[0040] It should be noted that the supporting conductor 210 has a second threaded hole 212 at the end opposite to the first through hole 211, and the second threaded hole 212 matches the fixing bolt 310. The connecting end of the transition conductor 230 and the supporting conductor 210 has a second through hole 231. The fixing bolt 310 passes through the second through hole 231 and is threadedly connected to the second threaded hole 212 on the supporting conductor 210, thereby achieving a stable connection between the supporting conductor 210 and the transition conductor 230. The transition conductor 230 has a third threaded hole 232 at the end opposite to the supporting conductor 210, and the axial direction of the third threaded hole 232 is parallel to the axial direction of the second through hole 231. The contact 220 has a third through hole 221, and the third through hole 221 extends along the length of the contact 220. The fixing bolt 310 passes through the third through hole 221 of the contact 220 and is threadedly connected to the third threaded hole 232 of the transition conductor 230, thereby achieving a stable connection between the contact 220 and the transition conductor 230.

[0041] Furthermore, the first through hole 211, the second through hole 231, and the third through hole 221 all include a receiving groove 320, which is designed to conceal the head of the fixing bolt 310. When the fixing bolt 310 is tightened, the nut of the fixing bolt 310 is located in the receiving groove 320, so that the nut of the fixing bolt 310 will not protrude from the surface of the corresponding conductor, avoiding the protruding part from affecting the installation or operation of other components; the first threaded hole 212, the second threaded hole 212, and the third threaded hole 232 are all countersunk holes.

[0042] Furthermore, the contact base 240 has a U-shaped cross-section, with its opening facing away from the interface of the second device. The bottom of the contact base 240 is fixedly connected to the insulator 110 at the interface of the second device. The contact base 240 matches the contact 220, with the end of the contact 220 facing away from the transition conductor 230 inserted into the contact base 240. This plug-and-play connection method makes it very convenient to connect and disconnect the contact 220 and the contact base 240. During installation, the connection can be completed simply by inserting the contact 220 into the contact base 240, without the need for complicated tools and cumbersome operations, thus improving work efficiency.

[0043] In one possible implementation, such as Figure 3 As shown, an operation window 101 is provided on the main bus housing 100; the operation window 101 is located on the side adjacent to the first device interface. It should be noted that the operation window 101 has a circular hole structure. The design of the operation window 101 facilitates the installation or removal of the isolation module and conduction module inside the main bus housing 100 through the operation window 101, thereby realizing the conduction or disconnection of the circuit between the DES equipment and the first output terminal of the circuit breaker.

[0044] In one possible implementation, such as Figure 3As shown, the inner diameter L of the operating window 101 ranges from 290mm to 310mm. The inner diameter L of the operating window 101 is designed to be 290mm to 310mm, allowing operators to easily extend their arms through the operating window 101 into the main busbar housing 100. At the same time, this size range also provides ample operating space for using tools such as torque wrenches, avoiding inconvenience caused by limited space. Sufficient operating space allows operators to perform connection and disconnection operations more quickly and conveniently, reducing operating time and workload.

[0045] Preferably, the inner diameter of the operation window 101 is 300mm.

[0046] In one possible implementation, two operation windows 101 are provided; the two operation windows 101 are arranged opposite each other and coaxially. It should be noted that the design of the two operation windows 101 being located on adjacent sides of the first device interface and being coaxially arranged allows operators to simultaneously disassemble and assemble equipment inside the main busbar housing 100 from different positions. While one operator is operating in one operation window 101, another operator can provide assistance from the opposite operation window 101, thus making the disassembly and assembly process smoother and improving work efficiency.

[0047] In one possible implementation, such as Figure 1 , Figure 2 As shown, an encapsulation cover 120 is provided at the operation window 101. The encapsulation cover 120 is installed at the operation window 101 and is used to seal the operation window 101 in the non-operation state. The encapsulation cover 120 cooperates with the insulators 110 at the first device interface and the second device interface to form a closed chamber in the main bus housing 100, thereby ensuring the stability of the electrical environment inside the main bus housing 100. By removing the sealing baffle, the operator can easily operate the isolation module and conduction module inside the main bus housing 100, avoiding complex disassembly of the bus structure, reducing workload and improving work efficiency.

[0048] In one possible implementation, such as Figure 1 , Figure 2As shown, it also includes an adsorbent 410 and an explosion-proof device 420. The explosion-proof device 420 is disposed on the side of the encapsulation cover 120 away from the main busbar housing 100. The adsorbent 410 is disposed inside the main busbar housing 100, and one end of the adsorbent 410 penetrates the encapsulation cover 120 and is fixedly connected to the explosion-proof device 420. The adsorbent 410 is suitable for adsorbing water vapor inside the main busbar housing 100, preventing short circuits and other faults caused by moisture accumulation, and ensuring the stability of equipment operation. The explosion-proof device 420 is suitable for depressurizing the main busbar housing 100, thereby preventing an explosion due to excessive gas pressure inside the main busbar housing 100.

[0049] Furthermore, the encapsulation cover 120 has mounting holes, and the explosion-proof device 420 has multiple first mounting ears. The multiple first mounting ears are spaced apart around the circumference of the explosion-proof device 420. Bolts pass through the first mounting ears and connect to the mounting holes on the encapsulation cover 120. By rotating the bolts, the explosion-proof device 420 is fixedly installed on the encapsulation cover 120. The adsorbent 410 is installed on the side of the encapsulation cover 120 away from the explosion-proof device 420 by bolts, and one end of the adsorbent 410 extends into the mounting hole and connects with the explosion-proof device 420, thereby realizing the connection between the adsorbent 410 and the explosion-proof device 420.

[0050] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A detachable three-phase main busbar structure, characterized in that, Suitable for electrical connections between DES equipment and circuit breakers, including: main bus housing, isolation module and conduction module; The main busbar housing is provided with a first device interface for electrically connecting the DES equipment and a second device interface for electrically connecting the circuit breaker. Both the first device interface and the second device interface are provided with insulators, and each insulator is sealed to the main busbar housing. The insulator at the first device interface is provided with a supporting conductor, and the insulator at the second device interface is provided with a contact seat; Both the isolation module and the conduction module are located inside the main busbar housing; and the conduction module is electrically connected to the support conductor and the contact seat respectively to conduct the path between the DES device and the circuit breaker. The isolation module includes: a first shielding head and a second shielding head; the first shielding head is installed at the end of the supporting conductor away from the interface of the first device; the second shielding head is plugged into and plugged into the contact seat so that an independent break is formed between the circuit breaker and the DES device.

2. The detachable three-phase main busbar structure according to claim 1, characterized in that, The conduction module includes a transition conductor and a contact; The two ends of the transition conductor are respectively connected to the supporting conductor and the contact by fixing bolts; The end of the contact away from the transition conductor is plugged into the contact seat.

3. The detachable three-phase main busbar structure according to claim 1, characterized in that, An operation window is provided on the main busbar housing; The operation window is located on the side adjacent to the first device interface.

4. The detachable three-phase main busbar structure according to claim 3, characterized in that, The operation window has two windows; The two operation windows are set opposite each other and are coaxial.

5. The detachable three-phase main busbar structure according to claim 3, characterized in that, The operation window is equipped with a sealing cover.

6. The detachable three-phase main busbar structure according to claim 5, characterized in that, It also includes adsorbents and explosion-proof devices; The explosion-proof device is disposed on the side of the encapsulation cover plate away from the main busbar housing, the adsorbent is disposed inside the main busbar housing, and one end of the adsorbent penetrates the encapsulation cover plate and is fixedly connected to the explosion-proof device.

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