Multi-loop low-voltage cabinet for new energy American transformation

Abstract

The utility model relates to a multi-loop low-voltage cabinet for a new energy American transformer, which is better in use safety and good in use effect, and comprises a new energy box-type transformer, one side of a low-voltage cabinet in the new energy box-type transformer is provided with a first cavity used for installing low-voltage terminals and a controller, one side of the low-voltage cabinet is provided with a second cavity used for installing air switches and a circuit breaker, the first cavity is internally provided with a plurality of low-voltage terminals and the controller, and the second cavity is internally provided with a first air switch set, a second air switch set, a third air switch set and the circuit breaker. The multi-loop low-voltage cabinet for the new energy American transformer has the advantages that the use safety is better, and the use effect is good.

Description

Technical Field

[0001] This utility model belongs to the field of new energy transformer manufacturing technology, specifically relating to a multi-circuit low-voltage switchgear for new energy transformers. Background Technology

[0002] An existing type of multi-circuit low-voltage switchgear for new energy transformers, such as Figure 4 As shown, the transformer includes a new energy box-type transformer. The low-voltage cabinet 1' of the new energy box-type transformer has a chamber 2' on one side for installing low-voltage terminals and controllers, and a chamber 3' on the other side for installing circuit breakers and switches. Chamber 2' contains multiple low-voltage terminals and controllers. Chamber 3' contains circuit breaker group 4', circuit breaker group 5', circuit breaker group 6', and a circuit breaker 7'. Circuit breaker group 4' consists of four circuit breakers arranged in a straight line; circuit breaker group 5' consists of four circuit breakers arranged in a straight line; circuit breaker group 6' consists of three circuit breakers arranged in a straight line; and the chamber 3'... The upper part is equipped with a circuit breaker group 4' and a circuit breaker 7' arranged side by side, with the circuit breaker group 4' being close to the chamber 2'. The lower part of the chamber 3' is equipped with a circuit breaker group 5' and a circuit breaker group 6' arranged side by side, with the circuit breaker group 5' being close to the chamber 2'. The existing multi-circuit low-voltage switchgear for new energy transformers has a relatively poor safety profile because the circuit breaker group 1, circuit breaker group 2, circuit breaker group 3 and the circuit breaker are installed in the same large chamber. When one of the components (circuit breaker, circuit breaker) generates an open flame due to a short circuit or other reasons, all the components in the large chamber will be burned. That is, the existing multi-circuit low-voltage switchgear for new energy transformers has relatively poor safety profile. Utility Model Content

[0003] Design objective: To overcome the shortcomings of the prior art, this design aims to create a new energy transformer multi-circuit low-voltage switchgear that not only offers better safety but also superior performance.

[0004] Design scheme: To achieve the above design objectives.

[0005] 1. The design of having a metal partition between the first circuit breaker group and the circuit breaker, a metal partition between the first and second circuit breaker groups, a metal partition between the circuit breaker and the third circuit breaker group, a partition between the second and third circuit breaker groups, and a partition between the circuit breaker group and the third circuit breaker group, wherein the circuit breaker group has a separate circuit breaker compartment separated by the first and third metal partitions, the first circuit breaker group has a cable compartment separated by the first and second metal partitions, the second circuit breaker group has a cable compartment separated by the second and fourth metal partitions, and the third circuit breaker group has a cable compartment separated by the third and fourth metal partitions, is one of the technical features of this utility model. The purpose of this design is as follows: a metal partition 1 is provided between the circuit breaker group 1 and the circuit breaker; a metal partition 2 is provided between the circuit breaker group 1 and the circuit breaker group 2; a metal partition 3 is provided between the circuit breaker and the circuit breaker group 3; a partition 4 is provided between the circuit breaker group 2 and the circuit breaker group 3; the circuit breaker forms an independent circuit breaker compartment under the separation of the metal partition 1 and the metal partition 3; the circuit breaker group 1 forms a cable compartment 1 under the separation of the metal partition 1 and the metal partition 2; the circuit breaker group 2 forms a cable compartment 2 under the separation of the metal partition 2 and the metal partition 4; and the circuit breaker group 3 forms a cable compartment 3 under the separation of the metal partition 3 and the metal partition 4. The compartment 2 is divided into four independent sub-compartments by four metal partitions, which improves the safety of using a multi-circuit low-voltage switchgear for new energy transformers.

[0006] 2. The upper end face of the second metal partition is provided with three circular through holes that penetrate the upper and lower end faces of the second metal partition. The upper end face of the second metal partition is provided with a rectangular through hole that penetrates the upper and lower end faces of the second metal partition. The second metal partition includes a first metal plate and a second metal plate. The first metal plate is provided with three semi-circular through holes one, and the second metal plate is provided with three semi-circular through holes two. The second metal plate is provided with a rectangular notch. When the first metal plate and the second metal plate are fixed together by screws, the semi-circular through holes one and the corresponding semi-circular through holes two form a circular through hole and the rectangular notch forms a rectangular through hole. This design is the second technical feature of this utility model. The purpose of this design is as follows: the upper surface of the second metal partition has three circular through holes that penetrate both the upper and lower surfaces of the second metal partition, and the upper surface of the second metal partition has a rectangular through hole that penetrates both the upper and lower surfaces of the second metal partition; the second metal partition includes a first metal plate and a second metal plate, the first metal plate has three semi-circular through holes one, the second metal plate has three semi-circular through holes two, and the second metal plate has a rectangular notch. When the first metal plate and the second metal plate are fixed together by screws, the semi-circular through holes one and the corresponding semi-circular through holes two form a circular through hole, and the rectangular notch forms a rectangular through hole. The three circular through holes are used to pass through cables (cables located between cable chamber one and cable chamber two), and the rectangular through hole is used to pass through copper busbars (copper busbars located between cable chamber one and cable chamber two). The structure of the second metal partition, which is composed of the first metal plate and the second metal plate, facilitates the installation of the second metal partition between circuit breaker group one and circuit breaker group two.

[0007] 3. The design of having an inspection door on the right side of the low-voltage cabinet, with the inspection door facing directly into chamber one, is the third technical feature of this utility model. The purpose of this design is that having an inspection door on the right side of the low-voltage cabinet, with the inspection door facing directly into chamber one, facilitates maintenance personnel to inspect and maintain the controller and low-voltage terminals in chamber one.

[0008] 4. The design of a 300mm-350mm gap between the copper strip on the circuit breakers in circuit breaker group two and circuit breaker group three and the inner bottom surface of the low-voltage switchgear is the fourth technical feature of this utility model. The purpose of this design is that the 300mm-350mm gap between the copper strip on the circuit breakers in circuit breaker group two and circuit breaker group three and the inner bottom surface of the low-voltage switchgear provides a sufficiently large insulation safety distance after the cable is connected to the circuit breaker, thereby improving the safety of using a multi-circuit low-voltage switchgear for new energy transformers.

[0009] 5. The design that metal partitions one, two, three, and four are respectively connected to the grounding wire is the fifth technical feature of this utility model. The purpose of this design is that the connection of metal partitions one, two, three, and four to the grounding wire improves the safety of using a multi-circuit low-voltage switchgear for new energy transformers.

[0010] 6. The new energy box-type transformer is equipped with three pairs of current transformers arranged in a straight line, with each pair of current transformers arranged vertically. This design is the sixth technical feature of this utility model. The purpose of this design is that the distribution of six current transformers—three pairs arranged in a straight line with each pair arranged vertically—improves heat dissipation during operation, thereby enhancing the performance of the multi-circuit low-voltage switchgear used in the new energy transformer.

[0011] Technical Solution: A multi-circuit low-voltage switchgear for new energy transformers, comprising a new energy box-type transformer. The low-voltage switchgear in the new energy box-type transformer has a chamber 1 on one side for installing low-voltage terminals and controllers, and a chamber 2 on the other side for installing circuit breakers and air switches. Chamber 1 contains multiple low-voltage terminals and controllers. Chamber 2 contains air switch group 1, air switch group 2, air switch group 3, and a circuit breaker. A metal partition 1 is provided between air switch group 1 and the circuit breaker. A metal partition 2 is provided between air switch group 1 and air switch group 2. A metal partition 3 is provided between the circuit breaker and air switch group 3. A partition four is provided between the three. The circuit breaker forms an independent circuit breaker compartment under the separation of metal partition one and metal partition three. The circuit breaker group one forms a cable compartment one under the separation of metal partition one and metal partition two. The circuit breaker group two forms a cable compartment two under the separation of metal partition two and metal partition four. The circuit breaker group three forms a cable compartment three under the separation of metal partition three and metal partition four. The upper end face of the metal partition two is provided with three circular through holes that penetrate the upper and lower end faces of the metal partition two. The upper end face of the metal partition two is provided with a rectangular through hole that penetrates the upper and lower end faces of the metal partition two.

[0012] Compared with the prior art, the multi-circuit low-voltage switchgear for new energy transformers not only has better safety but also better performance. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of a multi-circuit low-voltage switchgear for new energy power conversion.

[0014] Figure 2 This is a schematic diagram of the structure of metal partition two.

[0015] Figure 3 This is a cross-sectional structural diagram of a multi-circuit low-voltage switchgear for new energy power conversion (viewed from above).

[0016] Figure 4 This is a cross-sectional structural diagram of an existing multi-circuit low-voltage switchgear for new energy power conversion. Detailed Implementation

[0017] Example 1: Refer to Appendix Figures 1-3 A multi-circuit low-voltage switchgear for new energy transformers includes a new energy box-type transformer. The low-voltage switchgear 1 of the new energy box-type transformer has a chamber 2 on one side for installing low-voltage terminals and controllers, and a chamber 3 on the other side for installing circuit breakers and switchgear. Chamber 2 contains multiple low-voltage terminals and controllers. Chamber 3 contains a first circuit breaker group 4, a second circuit breaker group 5, a third circuit breaker group 6, and a circuit breaker 7. A metal partition 8 is provided between the first circuit breaker group 4 and the circuit breaker 7. A partition 8 is provided between the first circuit breaker group 4 and the second circuit breaker group 5. There is a metal partition 2 9. A metal partition 3 10 is provided between the circuit breaker 7 and the circuit breaker group 3 6. A partition 4 11 is provided between the circuit breaker group 2 5 and the circuit breaker group 3 6. The circuit breaker 7 forms a separate circuit breaker compartment 12 under the separation of the metal partition 1 8 and the metal partition 3 10. The circuit breaker group 1 4 forms a cable compartment 13 under the separation of the metal partition 1 8 and the metal partition 2 9. The circuit breaker group 2 5 forms a cable compartment 2 14 under the separation of the metal partition 2 9 and the metal partition 4 11. The circuit breaker group 3 6 forms a cable compartment 3 15 under the separation of the metal partition 3 10 and the metal partition 4 11. The upper end face of the metal partition 2 9 is provided with three circular through holes 91, and the circular through holes 91 penetrate the upper and lower end faces of the metal partition 2 9. The upper end face of the metal partition 2 9 is provided with a rectangular through hole 92, and the rectangular through hole 92 penetrates the upper and lower end faces of the metal partition 2 9.

[0018] The second metal partition 9 includes a first metal plate and a second metal plate. The first metal plate has three semi-circular through holes 1, and the second metal plate has three semi-circular through holes 2. The second metal plate has a rectangular notch. When the first metal plate and the second metal plate are fixed together by screws, the semi-circular through holes 1 and the corresponding semi-circular through holes 2 form a circular through hole 91 and the rectangular notch forms a rectangular through hole 92. The first metal plate and the second metal plate are fixed together by screws, which is an existing assembly technology, so it will not be described in detail here.

[0019] The operating voltage of the circuit breakers in circuit breaker group 1 (4), circuit breaker group 2 (5), and circuit breaker group 3 (6) is 800V. A maintenance door is located on the right side of the low-voltage cabinet 1, directly facing chamber 1 (2). The distance between the copper strip 61 on the circuit breakers in circuit breaker group 2 (5) and circuit breaker group 3 (6) and the inner bottom surface of the low-voltage cabinet 1 is 300mm-350mm. Metal partitions 1 (8), 2 (9), 3 (10), and 4 (11) are connected to the grounding wire. The new energy box-type transformer has three pairs of current transformers 16, arranged in a straight line, with each pair of current transformers arranged vertically.

[0020] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.

Claims

1. A multi-circuit low-voltage switchgear for new energy transformers, comprising a new energy box-type transformer, wherein the low-voltage switchgear (1) of the new energy box-type transformer has a chamber 1 (2) on one side for installing low-voltage terminals and controllers and a chamber 2 (3) on the other side for installing circuit breakers and circuit breakers, wherein the chamber 1 (2) contains multiple low-voltage terminals and controllers, and the chamber 2 (3) contains a circuit breaker group 1 (4), a circuit breaker group 2 (5), a circuit breaker group 3 (6) and a circuit breaker (7), characterized in that: The metal partition one (8) is arranged between the air switch group one (4) and the circuit breaker (7), the metal partition two (9) is arranged between the air switch group one (4) and the air switch group two (5), the metal partition three (10) is arranged between the circuit breaker (7) and the air switch group three (6), the metal partition four (11) is arranged between the air switch group two (5) and the air switch group three (6), the circuit breaker room (12) is formed by the metal partition one (8) and the metal partition three (10) under the separation of the circuit breaker (7), the cable room one (13) is formed by the metal partition one (8) and the metal partition two (9) under the separation of the air switch group one (4), the cable room two (14) is formed by the metal partition two (9) and the metal partition four (11) under the separation of the air switch group two (5), the cable room three (15) is formed by the metal partition three (10) and the metal partition four (11) under the separation of the air switch group three (6), the upper end surface of the metal partition two (9) is provided with three circular through holes (91) and the circular through holes (91) pass through the upper and lower end surfaces of the metal partition two (9), and the upper end surface of the metal partition two (9) is provided with a rectangular through hole (92) and the rectangular through hole (92) passes through the upper and lower end surfaces of the metal partition two (9).

2. The multi-loop low-voltage cabinet for new energy and power transformation according to claim 1, characterized in that: The metal partition two (9) comprises a first metal plate and a second metal plate, three semicircular through holes one are arranged on the first metal plate, three semicircular through holes two are arranged on the second metal plate, and a rectangular notch is arranged on the second metal plate, when the first metal plate and the second metal plate are fixed and spliced by screws, the semicircular through holes one and the corresponding semicircular through holes two form the circular through holes (91) and the rectangular notch forms the rectangular through hole (92).

3. The multi-loop low-voltage cabinet for new energy and power transformation according to claim 1 or 2, characterized in that: The working voltage of the air switch in the air switch group one (4), the air switch group two (5) and the air switch group three (6) is 800V.

4. The multi-circuit low-voltage cabinet for new energy and power transformation according to claim 1, characterized in that: The right side of the low-voltage cabinet (1) is provided with an access door opposite the chamber one (2).

5. The multi-circuit low-voltage cabinet for new energy and power transformation according to claim 1, characterized in that: The distance between the copper belt (61) on the air switch in the air switch group two (5) and the air switch group three (6) and the inner bottom surface of the low-voltage cabinet (1) is 300mm-350mm.

6. The multi-circuit low-voltage cabinet for new energy and power transformation according to claim 1, characterized in that: The metal partition one (8), the metal partition two (9), the metal partition three (10) and the metal partition four (11) are respectively connected with the grounding wire.

7. The multi-circuit low-voltage cabinet for new energy and power transformation according to claim 1, characterized in that: Three pairs of current transformers (16) are arranged in the new energy box-type transformer, the three pairs of current transformers (16) are arranged in a "one" shape, and the same pair of current transformers (16) is arranged in an upper and lower structure.

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