Low-voltage cabinet and box-type substation
By using frame circuit breakers, current transformers and lower row designs in low-voltage cabinets, the problem of excessive length of bus copper rows in existing low-voltage cabinets is solved, and the effect of reducing production costs and improving current monitoring accuracy is achieved.
Patent Information
- Application Number
- CN202420585755.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-25
AI Technical Summary
Due to the large number of terminals of the low-voltage cabinets in existing box substations, the busbar length is longer, which increases production costs.
A low-voltage cabinet is designed, using a frame circuit breaker, a current transformer and multiple lower port rows. The high current is converted into a low current through the current transformer, and the first output bit and optional second output bit are set at the output end to achieve reasonable arrangement of multiple terminals and avoid the use of bus copper rows.
Through this design, there is no need to use bus copper bars, the reasonable arrangement of multiple terminals is achieved, the production cost of low-voltage cabinets is reduced, and the accuracy of current monitoring and the reliability of electric cabinets is improved.
Smart Images
Figure CN222654599U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of box-type transformer substations, in particular to a low-voltage cabinet and a box-type transformer substation. Background Art
[0002] Under the general trend of global low-carbon economy and energy revolution, and under the goal of "carbon neutrality and carbon peak", new energy (wind power + photovoltaic) will gradually become the main energy source from the current auxiliary energy. The market demand for new energy generators is increasing, which also increases the demand for box-type substations deployed in new energy generators.
[0003] At present, the low-voltage cabinets in box-type substations usually arrange the wiring terminals on the busbar. Since there are many wiring terminals, the busbar needs to be arranged for a long length, resulting in a high production cost of the low-voltage cabinet. Utility Model Content
[0004] The main purpose of the utility model is to provide a low-voltage cabinet and a box-type substation, aiming to solve the technical problem that in the prior art, the low-voltage cabinet usually arranges the wiring terminals on the busbar. Since there are more wiring terminals, the busbar needs to be arranged for a longer length, resulting in a higher production cost of the low-voltage cabinet.
[0005] In order to achieve the above-mentioned object, the utility model proposes a low-voltage cabinet, which includes a cabinet body and a frame circuit breaker, a current transformer and a plurality of lower port rows arranged in the cabinet body;
[0006] The two ends of each lower port row are respectively an input end and an output end, and the lower port row includes an A-phase branch row, a B-phase branch row and a C-phase branch row. Multiple input ends are connected to the frame circuit breaker, multiple lower port rows pass through the current transformer, and the A-phase branch row and the C-phase branch row of each lower port row are overlapped with the current transformer, multiple output ends are arranged at intervals, and each output end forms a plurality of first output positions arranged at intervals, and each first output position is connected to a wiring terminal.
[0007] Optionally, a connection position is formed on each of the lower ports, and the connection position is arranged between the corresponding output end and the current transformer. The connection position is detachably connected to an additional row, and a plurality of second output positions arranged at intervals are formed at one end of the additional row away from the connection position, and each of the second output positions is connected to a wiring terminal.
[0008] Optionally, the additional row is connected to the connection position by bolts.
[0009] Optionally, a support frame is further provided in the cabinet body, and the support frame is used to support the frame circuit breaker, the current transformer and the plurality of lower port rows.
[0010] Optionally, the lower port row is connected to the support frame via an insulator.
[0011] Optionally, the plurality of output terminals are arranged at intervals along the horizontal direction, and the plurality of first output bits formed by each of the output terminals are arranged at intervals along the horizontal direction.
[0012] Optionally, the current transformer is a molded case current transformer.
[0013] Optionally, the A-phase branch bar is formed with an A-phase overlapping end, and the C-phase branch bar is formed with a C-phase overlapping end, and the A-phase overlapping end and the C-phase overlapping end are respectively overlapped on both sides of the width direction of the current transformer.
[0014] Optionally, a distance between the A-phase overlapping end and the C-phase overlapping end is greater than a width of the current transformer.
[0015] In a second aspect, the utility model further proposes a box-type substation, which is applied with the above-mentioned low-voltage cabinet.
[0016] The above one or more technical solutions provided by the present utility model may have the following advantages or at least achieve the following technical effects:
[0017] The utility model proposes a low-voltage cabinet and a box-type substation, which can control the connection and disconnection of the circuit through a frame circuit breaker, and has the function of protecting against overload and short circuit, and has high reliability. The current is output from the frame circuit breaker and distributed to a plurality of lower ports, and the plurality of lower ports pass through the current transformer. The high current at the input end of each lower port is converted into a low current at the output end through the current transformer. The lower port A phase branch and the C phase branch are overlapped with the current transformer, so that the current transformer can accurately measure the current in the A phase branch and the C phase branch, and realize the monitoring of the current in the lower port. The low current converted by the current transformer in the lower port is distributed to a plurality of first output positions at the output end, and then the current is output to an external circuit or device through the wiring terminal. By setting a plurality of lower ports, the output end of each lower port is arranged at intervals, and a plurality of first output positions for installing a plurality of wiring terminals are arranged at the output end of each lower port, and a plurality of wiring terminals can be reasonably arranged without using a busbar, thereby reducing the production cost of the low-voltage cabinet. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0019] Figure 1 It is a cross-sectional schematic diagram of a low-voltage cabinet according to an embodiment of the utility model;
[0020] Figure 2 It is a cross-sectional schematic diagram of a low-voltage cabinet according to an embodiment of the utility model at another viewing angle.
[0021] Description of Figure Numbers:
[0022] Label name Label name 100 Low voltage cabinet 43 First output bit 10 Cabinet body 44 Connection bit 20 Frame Breaker 45 Additional row 30 Current transformer 451 Second output bit 40 Lower mouth row 50 Terminal Blocks 41 Input 60 Support frame 42 Output
[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0026] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0028] The utility model proposes a low-voltage cabinet 100, which includes a cabinet body 10 and a frame circuit breaker 20, a current transformer 30 and a plurality of lower port rows 40 arranged in the cabinet body 10; the two ends of each lower port row 40 are respectively an input end 41 and an output end 42, and the lower port row 40 includes an A-phase branch row, a B-phase branch row and a C-phase branch row, the plurality of input ends 41 are all connected to the frame circuit breaker 20, the plurality of lower port rows 40 all pass through the current transformer 30, and the A-phase branch row and the C-phase branch row of each lower port row 40 are overlapped with the current transformer 30, the plurality of output ends 42 are arranged at intervals, and each output end 42 forms a plurality of first output positions 43 arranged at intervals, and each first output position 43 is connected to a wiring terminal 50.
[0029] Specifically, the circuit can be connected and disconnected by the frame circuit breaker 20, and it has the function of protecting against overload and short circuit, and has high reliability. The current is output from the frame circuit breaker 20 and distributed to multiple lower ports 40. The multiple lower ports 40 pass through the current transformer 30. The high current of the input end 41 of each lower port 40 is converted into a low current of the output end 42 by the current transformer 30. The A phase branch and the C phase branch of the lower port 40 are overlapped with the current transformer 30, so that the current transformer 30 can more accurately measure the current in the A phase branch and the C phase branch, and realize the monitoring of the current in the lower port 40. The low current converted by the current transformer 30 in the lower port 40 is distributed to the multiple first output positions 43 of the output end 42, and then the current is output to the external circuit or equipment through the terminal 50. By setting a plurality of lower port rows 40, the output ends 42 of each lower port row 40 are set at intervals, and a plurality of first output positions 43 for installing a plurality of wiring terminals 50 are set at the output end 42 of each lower port row 40, a reasonable arrangement of the plurality of wiring terminals 50 can be achieved without using a bus bar, thereby reducing the production cost of the low-voltage cabinet 100.
[0030] In one embodiment, a connection position 44 is also formed on each lower port row 40, and the connection position 44 is arranged between the corresponding output terminal 42 and the current transformer 30. The connection position 44 is detachably connected to an additional row 45, and a plurality of second output positions 451 arranged at intervals are formed at one end of the additional row 45 away from the connection position 44, and each second output position 451 is connected to a wiring terminal 50.
[0031] Specifically, as shown in the figure, by connecting the position 44, an additional row 45 can be easily added to the lower row 40, thereby adding additional terminals 50, which has good scalability. This modular design enables the low-voltage cabinet 100 to increase or decrease the number of terminals 50 according to different needs and scenarios, meets various complex power distribution needs, and has higher flexibility. And by adding additional rows 45 to the lower row 40, more output positions and terminals 50 can be added in a limited space, so that the space of the low-voltage cabinet 100 is more effectively utilized.
[0032] In one embodiment, the additional row 45 is connected to the connection position 44 by bolts, which can ensure a stable connection between the additional row 45 and the connection position 44, and has high reliability. Moreover, the bolts connect the additional row 45 to the connection position 44, which is convenient to install and remove with high efficiency.
[0033] In one embodiment, a support frame 60 is further disposed in the cabinet body 10 , and the support frame 60 is used to support the frame circuit breaker 20 , the current transformer 30 and the plurality of lower port rows 40 .
[0034] Specifically, as shown in the figure, the support frame 60 is arranged in the cabinet body 10, which can enhance the structural stability and strength of the low-voltage cabinet 100. And the support frame 60 also optimizes the spatial layout of the space in the cabinet body 10. The position and spacing of the frame circuit breaker 20, the current transformer 30 and the lower port row 40 can be reasonably arranged, so that the space inside the low-voltage cabinet 100 is fully utilized, and the mutual interference and collision between the frame circuit breaker 20, the current transformer 30 and the lower port row 40 are avoided. The integration of the low-voltage cabinet 100 is improved, and the maintenance and overhaul work of the low-voltage cabinet 100 in the later stage is made more convenient. And the support frame 60 can also provide a certain anti-seismic and vibration reduction effect for the frame circuit breaker 20, the current transformer 30 and the lower port row 40, thereby improving the anti-seismic performance and reliability of the low-voltage cabinet 100. In the power system, the low-voltage cabinet 100 is often subjected to vibration and impact from the external environment, such as earthquakes, mechanical vibrations, etc. The design of the support frame 60 can effectively absorb and disperse these vibrations and impacts, reduce the impact on key components such as the frame circuit breaker 20, the current transformer 30 and the lower port row 40, thereby improving the seismic performance and reliability of the low-voltage cabinet 100. In addition, the support frame 60 can more conveniently install the frame circuit breaker 20, the current transformer 30 and the lower port row 40 in the cabinet body 10, which is simple, convenient and efficient.
[0035] In one embodiment, the lower port row 40 is connected to the support frame 60 via an insulator.
[0036] In one embodiment, a plurality of output terminals 42 are arranged at intervals in the horizontal direction, and a plurality of first output positions 43 formed by each output terminal 42 are arranged at intervals in the horizontal direction. The wiring terminals 50 on the first output positions 43 are arranged reasonably and regularly and are easy to use.
[0037] In one embodiment, the current transformer 30 is a molded case current transformer 30 , which has good insulation performance, can effectively prevent the current from breaking down the current transformer 30 , and has higher reliability.
[0038] In one embodiment, the A-phase branch bar is formed with an A-phase overlapping end, and the C-phase branch bar is formed with a C-phase overlapping end. The A-phase overlapping end and the C-phase overlapping end are respectively overlapped on both sides of the current transformer 30 in the width direction.
[0039] Specifically, the A-phase branch and the C-phase branch extend in opposite directions along the current transformer 30 and overlap on both sides of the width direction of the current transformer 30, which can reduce the mutual interference between the current in the A-phase branch and the current in the C-phase branch and improve the detection accuracy of the current transformer 30.
[0040] In one embodiment, the spacing between the A-phase overlapped end and the C-phase overlapped end is greater than the width of the current transformer 30 , further reducing the mutual interference between the current in the A-phase branch and the current in the C-phase branch, thereby improving the detection accuracy of the current transformer 30 .
[0041] In the second aspect, the utility model also proposes a box-type substation, which is applied with the above-mentioned low-voltage cabinet 100. The specific structure of the box-type substation refers to the above-mentioned embodiment. Since the box-type substation adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.
[0042] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A low voltage cabinet, characterized in that: The low voltage cabinet comprises a cabinet body and a frame circuit breaker, a current transformer and a plurality of lower port rows arranged in the cabinet body; The two ends of each lower port row are respectively an input end and an output end, and the lower port row includes an A-phase branch row, a B-phase branch row and a C-phase branch row. Multiple input ends are connected to the frame circuit breaker, multiple lower port rows pass through the current transformer, and the A-phase branch row and the C-phase branch row of each lower port row are overlapped with the current transformer, multiple output ends are arranged at intervals, and each output end forms a plurality of first output positions arranged at intervals, and each first output position is connected to a wiring terminal.
2. The low voltage cabinet according to claim 1, characterized in that: A connection position is also formed on each of the lower ports, and the connection position is arranged between the corresponding output end and the current transformer. The connection position is detachably connected to an additional row, and a plurality of second output positions arranged at intervals are formed at one end of the additional row away from the connection position, and each of the second output positions is connected to a wiring terminal.
3. The low voltage cabinet according to claim 2, characterized in that: The additional row is connected to the connection position by bolts.
4. The low voltage cabinet according to claim 1, characterized in that: A support frame is also provided in the cabinet body, and the support frame is used to support the frame circuit breaker, the current transformer and the plurality of lower port rows.
5. The low voltage cabinet according to claim 4, characterized in that: The lower port row is connected to the support frame through an insulator.
6. The low voltage cabinet according to any one of claims 1 to 5, characterized in that: The plurality of output terminals are arranged at intervals along the horizontal direction, and the plurality of first output bits formed by each of the output terminals are arranged at intervals along the horizontal direction.
7. The low voltage cabinet according to any one of claims 1 to 5, characterized in that: The current transformer is a molded case current transformer.
8. The low voltage cabinet according to any one of claims 1 to 5, characterized in that: The A-phase branch bar is formed with an A-phase overlapping end, and the C-phase branch bar is formed with a C-phase overlapping end. The A-phase overlapping end and the C-phase overlapping end are respectively overlapped on both sides of the width direction of the current transformer.
9. The low voltage cabinet according to claim 8, characterized in that: The distance between the A-phase overlapping end and the C-phase overlapping end is greater than the width of the current transformer.
10. A box-type substation, characterized in that: The box-type substation is applied with a low-voltage cabinet as described in any one of claims 1 to 9.