CN217656475U

CN217656475U - Medium-voltage back-to-back dual-power-supply conversion circuit breaker

Info

Publication number: CN217656475U
Application number: CN202221417571.1U
Authority: CN
Inventors: 马晓东; 李博轩
Original assignee: Shaanxi Longxiang Electrical Co ltd
Current assignee: Shaanxi Longxiang Electrical Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-10-25
Anticipated expiration: 2032-06-08

Abstract

The utility model provides a middling pressure back to back dual supply changeover circuit breaker, belongs to circuit breaker technical field, including the circuit breaker cabinet body, the insulating multiunit back to back dual supply changeover circuit breaker group that is fixed with in the inside intermediate position of the circuit breaker cabinet body, the main female row of sharing is connected on every group back to back dual supply changeover circuit breaker group upper portion, the female row of connecting of main female row arranges, female arranging fixes on the internal wall of circuit breaker cabinet and wears out the circuit breaker cabinet body through insulation system, back to back dual supply changeover circuit breaker group's circuit breaker cable and the cable junction who stretches into from circuit breaker cabinet body lower part. The utility model discloses a reliable mechanical interlocking and electrical interlocking realize that the trouble stops the power supply zero clearance and resumes, protect important equipment and do not cut off the power supply, satisfy important place power supply demand, effectively reduce distribution equipment area, operating personnel is easier to operate, more laborsaving, the reliability is higher, has alleviateed operating personnel's working strength, has practiced thrift the cost greatly, is particularly suitable for the switchgear as important load power supplies such as high-rise building.

Description

Medium-voltage back-to-back dual-power-supply conversion circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker, concretely relates to middling pressure back to back dual supply conversion circuit breaker.

Background

In order to improve the continuity and reliability of the electric power operation of important users or equipment, a 10KV system adopts two power supply incoming lines, so that a series of electric power equipment such as two incoming line switch cabinets, matching cabinets and the like is required. In order to reliably switch between the two inlet cabinets, the inlet cabinet circuit breaker is generally required to have both mechanical interlocking and electrical interlocking. Therefore, in practical application, the scheme has the following defects: (1) The occupied area is large because of the dual power supply incoming lines and the two incoming line cabinets and the matching cabinet; (2) The safety and reliability are poor, the distance between the incoming line cabinets is long, the interlocking function of the incoming line circuit breaker is inconvenient to realize, and operators are easy to run at wrong intervals to cause safety accidents; (3) The power supply can not be stopped without clearance really, and the power supply of important electric equipment can not be guaranteed. There is therefore a need for improvements.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the utility model provides a middling pressure double power supply changeover circuit breaker back to back, the utility model relates to a vacuum circuit breaker of installation back to back realizes the trouble through reliable mechanical interlocking and electrical interlocking and stops the power supply zero clearance and resume, protects important equipment and does not cut off the power supply, satisfies important place power supply demand, can effectively reduce distribution equipment area, makes operating personnel operate more easily, more laborsaving, the reliability is higher, has alleviateed operating personnel's working strength, has practiced thrift the cost greatly, is particularly suitable for the switchgear of important load power supplies such as high-rise building.

The utility model adopts the technical proposal that: medium-voltage back-to-back dual-power-supply conversion circuit breaker comprises a circuit breaker cabinet body, the insulating multiunit back-to-back dual-power-supply conversion circuit breaker group, every group are fixed at the middle position in the cabinet body, a main bus is connected on the upper portion of the back-to-back dual-power-supply conversion circuit breaker group, the main bus is connected with a bus bar, the bus bar is fixed on the inner wall of the cabinet body of the circuit breaker through an insulating structure and penetrates out of the cabinet body of the circuit breaker, a circuit breaker cable of the back-to-back dual-power-supply conversion circuit breaker group is connected with a cable extending into the lower portion of the cabinet body of the circuit breaker.

Further inject above-mentioned technical scheme, every group back to back type dual power supply changeover circuit breaker group is including the left side circuit breaker and the right side circuit breaker of back to back installation, the left mechanical interlock that stretches out on left side circuit breaker right side and the right mechanical interlock interconnect that stretches out on the left side of the right side circuit breaker realize the interlocking, left side circuit breaker and right side circuit breaker upper portion connection main bus bar.

Further inject above-mentioned technical scheme, female one end of arranging is connected main female arranging, the inside lateral wall top of the circuit breaker cabinet is equipped with supporting insulator I, the outside lateral wall top of the circuit breaker cabinet is equipped with the bus-bar sleeve pipe, female arranging and I fixed connection of supporting insulator, female arranging the other end and wearing out the circuit breaker cabinet body from the bus-bar sleeve pipe.

Further inject above-mentioned technical scheme, left side circuit breaker and right side circuit breaker all fix in the middle of the internal portion of circuit breaker cabinet through supporting insulator II.

Further inject above-mentioned technical scheme, the internal below both sides of circuit breaker cabinet all are fixed with wall bushing and support insulator III, circuit breaker cable and wall bushing on left side circuit breaker and the right side circuit breaker, the wall bushing is connected with support insulator III, support insulator III and cable junction.

Further inject above-mentioned technical scheme, the inside instrument box that is equipped with of circuit breaker cabinet body.

The utility model has the advantages compared with the prior art:

1. in order to solve the problems of a dual-power cabinet in an important power supply occasion during operation, the vacuum circuit breaker which is arranged back to back is designed from the angles of compact structure, safe and reliable work, humanized operation and reduced occupied area, the gapless recovery of power supply during failure shutdown is realized through reliable mechanical interlocking and electrical interlocking, important equipment is protected from power failure, and the power supply requirement of an important place is met; compared with the traditional power supply equipment, the power supply can effectively reduce the floor area of the power distribution equipment by using the dual-power-supply conversion circuit breaker, so that the power supply is easier to operate, more labor-saving and higher in reliability for operators, lightens the working intensity of the operators, greatly saves the cost, and is particularly suitable for being used as switching equipment for supplying power to important loads such as high-rise buildings and the like;

2. the back-to-back installation of the circuit breaker in the scheme is in a cabinet body, so that the space is saved, and the back-to-back installation of the circuit breaker is easier to realize mechanical interlocking, electrical interlocking and safe and reliable operation.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a left side view of the structure of the present invention;

fig. 3 is a schematic structural diagram of the dual power conversion circuit breaker set of the back-to-back type of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Referring to fig. 1-3, embodiments of the present invention are detailed.

Medium voltage back to back dual supply conversion circuit breaker, including the circuit breaker cabinet body 16, the inside intermediate position of circuit breaker cabinet body 16 is fixed with multiunit back to back type dual supply conversion circuit breaker group 1 in the insulation.

Every group back to back type dual power supply changeover circuit breaker group 1 is including back to back left side circuit breaker 2 and right side circuit breaker 3 of installation, left side circuit breaker 2 and right side circuit breaker 3 are all fixed in the middle of the inside of circuit breaker cabinet body 16 through supporting insulator II 10. Left mechanical interlocking 4 that stretches out on left side circuit breaker 2 right side and right mechanical interlocking 5 interconnect that stretches out on 3 left sides of right side circuit breaker realize the interlocking, 3 upper portions of left side circuit breaker 2 and right side circuit breaker are connected a main female row 6 of sharing.

The main busbar 6 is connected with a busbar 9, and the busbar 9 is fixed on the inner wall of the breaker cabinet 16 through an insulation structure and penetrates out of the breaker cabinet 16. Specifically, female 9 one end connection owner of arranging is arranged 6, 16 inside lateral walls tops of the circuit breaker cabinet body are equipped with supporting insulator I8, 16 outside lateral walls tops of the circuit breaker cabinet body are equipped with bus sleeve 7, female 9 and supporting insulator I8 fixed connection of arranging, female 9 other ends of arranging wears out the circuit breaker cabinet body 16 from bus sleeve 7.

The circuit breaker cable 12 of the back-to-back type double power supply switching breaker group 1 is connected with a cable 14 extending from the lower part of a circuit breaker cabinet 16. Specifically, all be fixed with wall bushing 11 and supporting insulator III 13 in the inside below both sides of circuit breaker cabinet body 16, circuit breaker cable 12 on left side circuit breaker 2 and the right side circuit breaker 3 is connected with wall bushing 11, wall bushing 11 is connected with supporting insulator III 13, supporting insulator III 13 is connected with cable 14.

An instrument box 15 is arranged inside the breaker cabinet 16.

The dual-power conversion circuit breaker and other accessories are assembled according to the display structure shown in figures 1-3, a load switch cabinet is connected through a main bus bar 6, the dual-power conversion circuit breaker is connected together through a shared bus bar 9 at the upper end, the two circuit breakers are installed back to back through mechanical interlocking and internal electrical interlocking which extend from left to right to realize interlocking, when one circuit breaker is switched on, the other circuit breaker is in a switch-off position, the two circuit breakers can be switched on and used, and the two circuit breakers can be mutually used as the reserve of the other circuit breaker to achieve the purpose of continuously supplying power.

The utility model discloses a reliable mechanical interlocking and electric interlocking realize that the trouble stops the power supply zero clearance and resumes, protect important equipment and do not cut off the power supply, satisfy important place power supply demand. This power is through using dual power supply conversion circuit breaker, and more traditional power supply unit can effectively reduce distribution equipment area, makes operating personnel operate more easily, more laborsaving, the reliability is higher, has alleviateed operating personnel's working strength, has practiced thrift the cost greatly, is particularly suitable for the switchgear of important load power supplies such as high-rise building.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. Two power supply changeover circuit breakers of middling pressure back to back, its characterized in that: including the circuit breaker cabinet body (16), the inside intermediate position of the circuit breaker cabinet body (16) is insulating to be fixed with multiunit back to back type dual power supply changeover circuit breaker group (1), every group back to back type dual power supply changeover circuit breaker group (1) upper portion is connected a main female row (6) of sharing, main female row (6) are connected female arranging (9), female arranging (9) are fixed on the inner wall of the circuit breaker cabinet body (16) through insulation system and are worn out the circuit breaker cabinet body (16), circuit breaker cable (12) of back to back type dual power supply changeover circuit breaker group (1) are connected with cable (14) that stretch into from the circuit breaker cabinet body (16) lower part.

2. The medium voltage back-to-back dual power transfer circuit breaker of claim 1, wherein: every group back to back type dual power supply conversion circuit breaker group (1) is including left side circuit breaker (2) and right side circuit breaker (3) of back to back installation, left mechanical interlocking (4) that left side circuit breaker (2) right side was stretched out and right mechanical interlocking (5) interconnect that right side circuit breaker (3) left side was stretched out realize the interlocking, main female arranging (6) are connected on left side circuit breaker (2) and right side circuit breaker (3) upper portion.

3. The medium voltage back-to-back dual power transfer circuit breaker of claim 2, wherein: female arranging (9) one end connection owner arranges (6), the inside lateral wall top of the breaker cabinet body (16) is equipped with supporting insulator I (8), the outside lateral wall top of the breaker cabinet body (16) is equipped with bus-bar sleeve (7), female arranging (9) and supporting insulator I (8) fixed connection, female arranging (9) other end and wearing out the breaker cabinet body (16) from bus-bar sleeve (7).

4. The medium voltage back-to-back dual power transfer circuit breaker of claim 2, wherein: left side circuit breaker (2) and right side circuit breaker (3) are all fixed in the middle of circuit breaker cabinet body (16) inside through supporting insulator II (10).

5. The medium voltage back-to-back dual power transfer circuit breaker of claim 2, wherein: the utility model discloses a circuit breaker cabinet body, including circuit breaker cabinet body (16), circuit breaker cable (12) and wall bushing (11), wall bushing (11) and support insulator III (13) all are fixed with in circuit breaker cabinet body (16) inside below both sides, circuit breaker cable (12) on left side circuit breaker (2) and right side circuit breaker (3) are connected with wall bushing (11), wall bushing (11) are connected with support insulator III (13), support insulator III (13) are connected with cable (14).

6. The medium voltage back-to-back dual power transfer circuit breaker of claim 1, wherein: an instrument box (15) is arranged inside the breaker cabinet body (16).