Pluggable all-insulation touchable cable downward-entering and bus connection high-voltage switch cabinet
By eliminating the busbar bridge on the top of the cabinet and adopting a fully insulated cable head design, the problems of complex construction and safety hazards in the capacity expansion and renovation of high-voltage switchgear have been solved, achieving the effects of cost reduction, power loss reduction and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-20
AI Technical Summary
Existing high-voltage switchgear faces problems such as large workload, high cost, numerous safety hazards, insufficient space, and inconvenient maintenance during capacity expansion or renovation, making it difficult to meet actual needs.
A pluggable, fully insulated, touchable cable-connected high-voltage switchgear with busbar connection was designed. The top busbar bridge was eliminated, and a three-phase pluggable, fully insulated, touchable cable head was used. Stainless steel partitions and insulating materials were used to isolate the cable from the high-voltage components, simplifying the connection structure and keeping the switchgear's external dimensions unchanged.
It reduces the production cost and manufacturing cycle of switchgear, reduces power loss, improves safety and maintenance convenience, and meets construction and usage requirements.
Smart Images
Figure CN224021250U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a switch cabinet equipment technical field, especially a plug -in full insulation can touch cable lower access and bus tie high voltage switch cabinet. BACKGROUND
[0002] High voltage switch cabinet (hereinafter referred to as switch cabinet) is indispensable equipment in power system, mainly used for power generation, power transmission, power distribution, switching, control or protection in the process of electric energy conversion and consumption effect, it is widely used in power system, metallurgy, coal, petrochemical, railway transportation and other fields, is the key equipment of power transmission and distribution and motor control protection. Due to the demand of economic development for power development, in actual production, often encounter the problem that the function of old switch cabinet cannot meet the actual application, need to increase the capacity or transform switch cabinet, specifically, need to add or transform cable access and bus tie double function unit in high voltage switch cabinet, however, the distribution room space for installing switch cabinet is limited, and the installation foundation position of switch cabinet is not easy to transform or re-construction, and the application terminal requires to provide a kind of switch cabinet product that can meet the actual demand under the condition of trying to use existing condition, reducing production cost and facilitating installation.
[0003] In actual situation, for example, the existing 10kV switch cabinet foundation needs to realize the capacity increase or transformation, which is to transform the electrical primary design scheme into cable access and bus tie (see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4), because 10kV three-phase high-voltage incoming cable 8 and three-phase connection bus 3 are in the same space 2, and interact with each other, in order to eliminate the mutual influence and meet the requirements of the international standard of the phase-to-phase electrical clearance, the connection bus 3 cannot be directly connected from the cable room 2 below the side to the connection bus of the cable incoming line and PT cabinet, only the structure depth of the power cable incoming line and bus connection cabinet and PT cabinet is deepened from 1450mm 11 to at least 1800mm 10, the three-phase connection bus 3 is supported and fixed by the insulator 5 through the bushing 6 to the top bus bridge 4 of the cabinet, and then the bus bars between the two cabinets are connected through the top bus bridge 4 of the cabinet to realize the function of the three-phase connection bus connection, after the cabinet body structure is deepened, the cabinet body is protruded by 350mm on the rear side of the cabinet body without deepening, the width of the maintenance space behind the cabinet is insufficient (see the existing distribution room switch cabinet layout), the width of 655mm cannot meet the requirements of the relevant national standards, or in order to meet the requirements of the relevant national standards of the maintenance space of 800mm wide, the whole row of switch cabinets is moved forward, and the foundation of the switch cabinet installation is also moved forward, so that the construction workload is greatly increased, the construction period is lengthened, and the construction cost is increased; furthermore, because the bushing 6 and the top bus bridge 4 are installed on the top of the rear side of the switch cabinet, the top pressure relief channel 7 of the cabinet is cancelled, if a short circuit fault occurs in the cable room, high-pressure gas cannot be safely and timely discharged, which brings hidden dangers to the safety; in addition, the height of the switch cabinet body is 2.3m, and the total height of the top bus bridge 4 exceeds 3m, which may hit the downward protruding house beam of the distribution room ceiling, causing the top bus bridge of the cabinet to be unable to be installed, and the installation height of the top bus bridge 4 is too high and is not easy to maintain and daily patrol. In summary, the existing switch cabinet cannot meet the actual needs after capacity expansion or modification. Practical new type content
[0004] In order to overcome the disadvantages of the existing switch cabinet due to the limitation of the structure, the utility model provides a plug-in type full-insulated touchable cable downward incoming and bus connection high-voltage switch cabinet under the common action of related structures, which reduces the production cost of the switch cabinet body, shortens the manufacturing period of the switch cabinet, reduces the power loss, does not generate eddy current and local heating during operation, and is more convenient for installation, maintenance and maintenance, and has a more neat and beautiful appearance.
[0005] The technical scheme adopted by the utility model to solve the technical problems is:
[0006] The utility model provides a kind of plug-in full insulation touchable cable lower line and bus tie high voltage switch cabinet, including the high voltage switch cabinet body with generating cable line and bus tie cabinet and PT cabinet;The generating cable line and bus tie cabinet has circuit breaker, grounding switch, mounting partition, three-phase high voltage bushing, three-phase plug-in full insulation touchable cable head, 10kV three-phase line cable, three-phase wall bushing, three-phase tie bus bar;The PT cabinet has three-phase tie bus bar, mounting partition, mounting partition;The generating cable line and bus tie cabinet outside and PT cabinet outside are fixedly installed together, and two mounting partitions are respectively fixedly installed in the middle part of generating cable line and bus tie cabinet and PT cabinet, and the front lower end of generating cable line and bus tie cabinet and PT cabinet is as front chamber, and rear end is as cable chamber;The generating cable line and bus tie cabinet, circuit breaker is fixedly installed in the middle part of outer upper end of front chamber, grounding switch is fixedly installed in the middle part of lower rear side in cable chamber, three-phase high voltage bushing is fixedly installed in the upper end of outer middle part behind mounting front chamber, three-phase plug-in full insulation touchable cable head is fixedly installed in the upper end of rear inner middle part of front chamber, 10kV three-phase line cable upper part is fixedly installed in the lower end of three-phase plug-in full insulation touchable cable head, three-phase wall bushing is installed in the left lower end of cable chamber, and three-phase tie bus bar and three-phase wall bushing one end are fixedly connected;The three-phase tie bus bar of PT cabinet is fixedly installed in the right lower end of cable chamber, and three-phase tie bus bar of PT cabinet and three-phase wall bushing other end are fixedly connected;The rear upper middle part of generating cable line and bus tie cabinet and PT cabinet has an opening as pressure relief passage.
[0007] Further, the mounting partition is stainless steel material.
[0008] Further, the front end of the cabinet door of the generating cable line and bus tie cabinet and PT cabinet has a plurality of transparent observation windows.
[0009] Further, the structural depth of the generating cable line and bus tie cabinet and PT cabinet is between 1400mm and 1450mm.
[0010] Further, the mounting partitions of the generating cable line and bus tie cabinet and PT cabinet are respectively installed in the upper end of the front chamber.
[0011] Compared with the prior art, the utility model has the advantages of (1) compared with the prior art, two sets of cabinet top bus bridge and the connecting copper bar in the bus bridge are cancelled, the cost of the switch cabinet is reduced, and the manufacturing period of the switch cabinet is shortened; two sets of cabinet top bus bridge and the connecting copper bar in the bus bridge are cancelled, and the lower direct connection is changed, the length of the copper bar of each phase loop is greatly reduced, the loop resistance will inevitably be reduced, and the effect is that the loop bus heating is reduced, and the power loss is greatly reduced; (3) as the volume does not increase, the original switch cabinet installation foundation of the power distribution room can be effectively utilized, the construction workload and period are greatly reduced, and the construction cost is also reduced; as the partition plate between the cable chamber and the cabinet front compartment is changed into a non-magnetic stainless steel material, no eddy current will be generated during normal operation of the switch cabinet, and no local heating phenomenon will occur; (4) compared with the prior art, the incoming cable head is an air-insulated ordinary bolt-type cable head, the live part is completely exposed to the air, and the 125mm electrical clearance distance requirement must be met, and the application adopts a three-phase plug-in type full-insulation touchable cable head, and is installed in the switch cabinet front cable compartment and is completely separated from other high-voltage components (contact bus, grounding switch, high-voltage wall bushing and high-voltage circuit breaker), even if the high-voltage switch cabinet is in the power-on operation state, the cable head and the internal live body are completely insulated, the outer surface is not live, the safety is greatly provided, and the plug-in type makes it more convenient in installation, maintenance and maintenance. In summary, the new type has good application prospect. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the prior art high-voltage switch cabinet front view structure schematic diagram.
[0013] Figure 2 It is the prior art cable incoming line and bus tie-in cabinet side view.
[0014] Figure 3 It is the prior art power distribution room switch cabinet layout side view.
[0015] Figure 4 It is the prior art high-voltage switch cabinet front view structure schematic diagram.
[0016] Figure 5 It is the prior art cable incoming line and bus tie-in cabinet side view.
[0017] Figure 6 It is the prior art PT cabinet side view.
[0018] Figure 7 It is the prior art power distribution room switch cabinet layout.
[0019] In the figure, 1 is the front lower chamber of the 10kV switch cabinet; 2 is the cable chamber of the 10kV switch cabinet; 3 is the three-phase contact bus; 4 is the cabinet top bus bridge; 5 is the 10kV insulator; 6 is the busbar wall bushing; 7 is the pressure relief top cover of the switch cabinet cable chamber; 8 is the 10kV three-phase incoming cable; 9 is the grounding switch; 10 is the cabinet depth size of the existing switch cabinet; 11 is the cabinet depth size; 12 is the three-phase high voltage bushing; 13 is the three-phase plug-in full-insulation touchable cable head; 14 is the partition plate between the high voltage circuit breaker chamber and the front cabinet cable chamber; 15 is the partition plate between the 10kV switch cabinet cable chamber and the front cabinet; 16 is the switch cabinet lower door glass observation window; 17 is the circuit breaker. DETAILED DESCRIPTION
[0020] Figure 4 、 5 , 6, 7, a plug-in full-insulation touchable cable lower incoming and bus contact high voltage switch cabinet, comprising a high voltage switch cabinet body with a power cable incoming and bus contact cabinet and a PT cabinet, the power cable incoming and bus contact cabinet has a circuit breaker 17, a grounding switch 9, an installation partition plate 14, a three-phase high voltage bushing 12, a three-phase plug-in full-insulation touchable cable head 13, a 10kV three-phase incoming cable 8, a three-phase wall bushing 6, and a three-phase contact bus 3; the PT cabinet has a three-phase contact bus 3, an installation partition plate 15, and an installation partition plate 14; the left side of the outer of the power cable incoming and bus contact cabinet and the right side of the outer of the PT cabinet are fixedly installed together, the two installation partition plates 15 are respectively fixedly installed in the middle part of the inner of the power cable incoming and bus contact cabinet and the PT cabinet, the front lower end of the power cable incoming and bus contact cabinet and the PT cabinet serves as a front chamber 1, and the rear end thereof serves as a cable chamber 2; the circuit breaker 17 of the power cable incoming and bus contact cabinet is fixedly installed at the middle part of the upper end of the front chamber, the grounding switch 9 is fixedly installed at the middle part of the lower rear side in the cable chamber 2, the three-phase high voltage bushing 12 is fixedly installed at the upper end of the middle part of the rear outer of the installation front chamber, the three-phase plug-in full-insulation touchable cable head 13 is fixedly installed at the upper end of the middle part of the rear inner of the 1 front chamber, the upper part of the 10kV three-phase incoming cable 8 is fixedly installed at the lower end of the three-phase plug-in full-insulation touchable cable head 13, the three-phase wall bushing 6 is installed at the lower end of the left side of the inner of the cable chamber, and the three-phase contact bus 3 and the three-phase wall bushing 6 are fixedly connected at one end; the three-phase contact bus 3 of the PT cabinet is fixedly installed at the lower end of the right side of the inner of the cable chamber, and the three-phase contact bus 3 of the PT cabinet and the three-phase wall bushing 6 are fixedly connected at the other end; the rear side of the power cable incoming and bus contact cabinet and the PT cabinet has an opening as a pressure relief passage 7.
[0021] Figure 4 、 5, 6, 7, the installation partition 15 is stainless steel material. The front end of the cabinet door of the power cable incoming line and bus tie-in cabinet and PT cabinet has multiple transparent observation windows 16. The structure depth of the power cable incoming line and bus tie-in cabinet and PT cabinet is 1450mm. The installation partition 14 of the power cable incoming line and bus tie-in cabinet and PT cabinet is respectively installed at the upper end of the front chamber.
[0022] Figure 4 、 5 , 6, 7, in the present application, the switch cabinet body is a mature existing technology (including various internal components), the purpose of the present application is mainly to optimize the components, etc., other working principles and existing switch cabinets are consistent, so the new type does not elaborate on the working principle of the switch cabinet body (including the working principle of each component). Specifically, in the present application, the structure depth of the power cable incoming line and bus tie-in cabinet and PT cabinet is not increased, maintaining the original 1450mm (11), and the existing switch cabinet top bus bridge 4 is cancelled, the lower side grounding switch 9 in the cable incoming line and bus tie-in cabinet is moved to the back of the cabinet, the installation partition 15 of the grounding switch 9 of the existing switch cabinet is changed to stainless steel material and three-phase high-voltage bushing 12 is added, the original unused space 1 in front of the cabinet is installed with three-phase plug-in full-insulation touchable cable head 13 and 10kV three-phase incoming cable 8, another set of three-phase wall bushing 6 is installed on the side of the existing switch cabinet 10kV three-phase incoming cable 8 installation space 2, and the three-phase tie-in bus bar 3 between the two cabinets is connected through this set of three-phase wall bushing 6. In this way, since the depth of the back of the switch cabinet is not increased, the distance from the back of the cabinet to the wall of the distribution room is 1000mm, the width of the maintenance space at the back of the cabinet also meets the requirements of the relevant national standards, and the original switch cabinet installation foundation can be effectively utilized, which is convenient for construction, and the pressure relief channel 7 at the back of the cabinet top is reserved, the safety is better guaranteed. The cancellation of the cabinet top bus bridge 4 will not cause the problem of insufficient indoor height of the distribution room, and since the three-phase plug-in full-insulation touchable cable head 13 is adopted, even if the distance between the lower partition 14 of the high-voltage circuit breaker is only 50mm, it also meets the requirements of electrical clearance and safety, and can facilitate daily inspection (through the front lower door glass observation window 16).
[0023] Figure 4 、 5, 6, 7, through the above technical scheme, the new type has the following advantages. (1) Since the new type cancels two sets of cabinet top busbar bridges and the connecting copper bars in the busbar bridges, the cost of the switch cabinet is reduced, and the manufacturing period of the switch cabinet is shortened. (2) Since the new type cancels two sets of cabinet top busbar bridges and the connecting copper bars in the busbar bridges, and is changed to direct connection on the lower side, the length of the copper bars of each phase circuit is greatly reduced, and the circuit resistance will inevitably be reduced, and the effect is that the heating of the circuit bus is reduced, and the power loss is greatly reduced. (3) Since the new type can effectively utilize the installation foundation of the original switch cabinet in the distribution room, the construction workload and period are greatly reduced, and the construction cost is also reduced. (4) Since the partition plate between the 10kV switch cabinet cable chamber and the cabinet front compartment of the new type is changed to a non-magnetic stainless steel material, no eddy current will be generated during normal operation of the switch cabinet, and no local heating phenomenon will occur. (5) Since the existing technology 10kV incoming cable head is an ordinary bolt type cable head with air insulation, the live part is completely exposed to the air, and must meet the requirement of 125mm electrical clearance distance, while the new type adopts a three-phase plug-in type full-insulation touchable cable head, and is installed in the switch cabinet front cable compartment and is completely separated from other high-voltage components (contact bus, grounding switch, high-voltage through-wall bushing and high-voltage circuit breaker, etc.), even if the high-voltage switch cabinet is in a power-on operating state, the cable head and the internal live body are completely insulated, and the outer surface is not live, the safety is greatly improved, and the plug-in type makes it more convenient in installation, maintenance and maintenance. (6) The new type can keep the original switch appearance size uniform, so that the switch cabinet in the distribution room realizes neatness, uniformity and beauty as a whole.
[0024] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.
[0025] In addition, it should be understood that, although the present specification is described in terms of embodiments, the embodiments do not contain only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A pluggable, fully insulated, touchable cable-inlet busbar tie-down high-voltage switchgear, comprising a high-voltage switchgear body with a power cable inlet busbar tie-down cabinet and a PT cabinet; the power cable inlet busbar tie-down cabinet includes a circuit breaker, a grounding switch, mounting partitions, three-phase high-voltage bushings, three-phase pluggable, fully insulated, touchable cable heads, 10kV three-phase incoming cables, three-phase through-wall bushings, and three-phase tie busbars; the PT cabinet includes three-phase tie busbars, mounting partitions, and mounting partitions; characterized in that, The power cable inlet / busbar tie cabinet and the PT cabinet are fixedly installed together on the outside. Two mounting partitions are fixedly installed in the middle of the inner parts of the power cable inlet / busbar tie cabinet and the PT cabinet, respectively. The lower front end of the power cable inlet / busbar tie cabinet and the PT cabinet serve as the front compartment, and the rear end serves as the cable compartment. In the power cable inlet / busbar tie cabinet, the circuit breaker is fixedly installed in the middle of the upper part of the front compartment, the grounding switch is fixedly installed in the middle of the lower rear side of the cable compartment, and the three-phase high-voltage bushing is fixedly installed on one side of the upper middle of the rear outer part of the front compartment. The three-phase plug-in fully insulated and touchable type is also included. The cable head is fixedly installed at the upper middle of the rear of the front chamber. The upper part of the 10kV three-phase incoming cable is fixedly installed at the lower end of the three-phase pluggable fully insulated touchable cable head. The three-phase wall bushing is installed at the lower left side of the cable chamber. The three-phase connecting busbar and the three-phase wall bushing are fixedly connected at one end. The three-phase connecting busbar of the PT cabinet is fixedly installed at the lower right side of the cable chamber. The three-phase connecting busbar of the PT cabinet and the three-phase wall bushing are fixedly connected at the other end. The upper middle of the rear side of the power cable incoming busbar and the PT cabinet has an opening as a pressure relief channel.
2. The pluggable, fully insulated, touchable cable-operated busbar interconnection high-voltage switchgear according to claim 1, characterized in that, The mounting partition is made of stainless steel.
3. The pluggable, fully insulated, touchable cable-operated busbar interconnection high-voltage switchgear according to claim 1, characterized in that, The front of the cabinet doors of the power cable inlet / busbar connection cabinet and PT cabinet have multiple transparent observation windows.
4. A pluggable, fully insulated, touchable cable-operated high-voltage switchgear for busbar connection according to claim 1, characterized in that, The structural depth of the power cable incoming line and busbar interconnection cabinet and PT cabinet is between 1400mm and 1450mm.
5. A pluggable, fully insulated, touchable cable-operated high-voltage switchgear for busbar connection according to claim 1, characterized in that, The mounting partitions for the power cable inlet / busbar connection cabinet and the PT cabinet are respectively installed at the upper end of the anteroom.