CN210430429U

CN210430429U - Electrical equipment

Info

Publication number: CN210430429U
Application number: CN201921154466.1U
Authority: CN
Inventors: 陈琳; 朱天胜; 顾益
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-04-28
Anticipated expiration: 2029-07-22

Abstract

An electrical device comprises a cabinet body, wherein an electrical element is arranged in the cabinet body, one end of the electrical element is electrically connected with an input bus, and the other end of the electrical element is electrically connected with an output bus; the input bus comprises a one-phase or multi-phase input bus, and the output bus comprises a one-phase or multi-phase output bus; each phase input bus and/or each phase output bus comprises a plurality of flat conductors which are arranged in parallel; and a heat conducting sheet with the heat conductivity larger than 10W/(m.K) is arranged between two adjacent flat conductors in the input bus and/or the output bus of each phase, and the flat conductors are in contact with the heat conducting sheet. The utility model adopts the heat conducting fin to balance the temperature of each bus bar in phase as much as possible, and slow down the phenomenon of overhigh temperature rise of individual bus bars caused by skin effect and proximity effect; the high-current electric switch equipment has good heat conduction effect and temperature distribution, can reduce the temperature of a bus, and improves the current-carrying capacity of the high-current electric switch equipment.

Description

Electrical equipment

Technical Field

The utility model relates to an electric power system equipment field especially relates to an electrical equipment.

Background

Along with the wide application of electric energy, the capacity of a power transmission and distribution system is continuously increased, the input and the output of large-current electrical equipment are connected by adopting a plurality of flat copper buses, the copper buses are sequentially arranged in parallel in the A \ B \ C three phases of the electrical equipment, along with the increase of the current-carrying capacity of the buses, the current density near the surface of a bus conductor is higher than that of the center of the bus conductor due to the skin effect phenomenon, meanwhile, the adjacent conductor of A, B, C three phases is influenced by the proximity effect, so that the current in the bus conductor tends to or is far away from the side part closest to the adjacent phase conductor, and the two effects can cause each bus of each phase to bear uneven current distribution, so that the temperature of each individual bus of each phase is excessively increased, and the current-carrying capacity of large-current switch equipment.

Disclosure of Invention

The utility model provides an electrical equipment, aim at solve every looks individual generating line temperature rise too high, and then influence the problem of heavy current switchgear's current-carrying capacity.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an electrical device comprises a cabinet body, wherein an electrical element is arranged in the cabinet body, one end of the electrical element is electrically connected with an input bus, and the other end of the electrical element is electrically connected with an output bus; the input bus comprises a one-phase or multi-phase input bus, and the output bus comprises a one-phase or multi-phase output bus; each phase input bus and/or each phase output bus comprises a plurality of flat conductors which are arranged in parallel;

and a heat conducting sheet with the heat conductivity larger than 10W/(m.K) is arranged between two adjacent flat conductors in the input bus and/or the output bus of each phase, and the flat conductors are in contact with the heat conducting sheet.

The relevant content in the above technical solution is explained as follows:

1. in the above scheme, the heat conducting sheet is also arranged outside the outermost flat conductor of each phase input bus and/or output bus.

2. In the above scheme, the heat conducting sheet is made of copper or aluminum or ceramic.

3. In the above scheme, one end of the plurality of heat-conducting fins is fixedly connected with the base, and the other end of the plurality of heat-conducting fins is connected with the base through the fixing component.

4. In the above scheme, the fixing assembly includes a screw and a nut, and the screw and the nut are fixed in cooperation with the first mounting hole arranged at the end of the heat-conducting fin, so that the heat-conducting fin contacts with each flat conductor.

5. In the scheme, one end of each heat conducting fin is provided with a second mounting hole, and the other end of each heat conducting fin is provided with a third mounting hole; the second mounting holes of the plurality of heat-conducting fins are matched and fixed through screws and nuts; and the third mounting holes of the plurality of heat-conducting fins are matched and fixed through screws and nuts.

Compared with the prior art, the utility model have following advantage:

the thermally conductive sheet only needs to have a high thermal conductivity, and either electrical conduction or non-electrical conduction is possible. The heat conducting fins can balance the temperature of each bus bar in the same phase as much as possible, and the phenomenon that the temperature rise of individual bus bars is too high due to the skin effect and the proximity effect is relieved; the high-current electric switch equipment has good heat conduction effect and temperature distribution, can reduce the temperature of a bus, and improves the current-carrying capacity of the high-current electric switch equipment.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic diagram of an electrical component, an input bus and an output bus of the present invention;

FIG. 3 is a schematic view of the heat conducting fin with the input bus bar or the output bus bar of the present invention;

fig. 4 is a schematic view of a heat conductive sheet according to a first embodiment of the present invention.

In the above drawings: 1. a cabinet body; 2. an electrical component; 3. inputting a bus; 4. an output bus; 5. a heat conductive sheet; 51. a base; 521. and (7) installing holes.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the first embodiment is as follows:

referring to fig. 1-4, an electrical apparatus includes a cabinet 1, an electrical component 2 is disposed in the cabinet 1, one end of the electrical component 2 is electrically connected to an input bus 3, and the other end is electrically connected to an output bus 4; the input bus 3 comprises a one-phase or multi-phase input bus and the output bus 4 comprises a one-phase or multi-phase output bus. One end of the input bus 3 extends out of the cabinet body 1 for being electrically connected with other electrical equipment, and the other end of the input bus is positioned in the cabinet body 1 for being electrically connected with the electrical element 2. One end of the output bus 4, which is positioned in the cabinet body 1, is used for being electrically connected with the electrical element 2, and the other end of the output bus extends out of the cabinet body 1 and is electrically connected with other electrical equipment. The electrical component 2 is most commonly a circuit breaker, and in this embodiment, a frame type circuit breaker or a high-current molded case circuit breaker is preferred.

Specifically, the input bus 3 comprises an a-phase input bus, a B-phase input bus and a C-phase input bus; the phase A input bus, the phase B input bus and the phase C input bus respectively comprise N flat conductors which are arranged in parallel and have the same interval.

Correspondingly, the output bus 4 comprises an A-phase output bus, a B-phase output bus and a C-phase output bus, wherein the A-phase output bus, the B-phase output bus and the C-phase output bus all comprise N parallel conductors with the same interval.

And a heat conducting sheet 5 with the heat conductivity larger than 10W/(m.K) is arranged between two adjacent flat conductors in the input bus and/or the output bus of each phase, and the flat conductors are in contact with the heat conducting sheet 5. In this embodiment, the heat-conducting fins 5 are provided only on the input bus 3 located inside the cabinet 1, and the heat-conducting fins 5 are provided on the output bus 4 located inside and outside the cabinet 1. According to the actual needs, the position of the heat conducting fin 5 can be flexibly arranged, and the heat conducting fin is feasible outside the cabinet in the cabinet.

Preferably, the heat conducting sheet 5 is also arranged outside the outermost flat conductor of the input bus and/or the output bus of each phase, and N +1 heat conducting sheets 5 correspond to the N flat conductors.

The thermally conductive sheet 5 is electrically conductive or non-conductive, and is preferably copper, wherein the thermal conductivity of copper is 387.6W/(m · K). Of course, other conductive materials are also feasible, such as iron, aluminum, etc., and will not be described in detail here. In addition, if a non-conductive material is selected, such as alumina ceramic, the thermal conductivity of which is 30W/(m · K), the usage requirement can be met, and the same is also feasible.

The flat conductor is in contact with the heat-conducting fin 5 in the following specific manner:

one end of each of the plurality of heat-conducting fins 5 is fixedly connected with a base 51, the plurality of heat-conducting fins 5 are arranged on the base 51 in a comb-like structure, and the flat conductors of any phase of the input bus 3 or/and the output bus 4 are clamped between the adjacent heat-conducting fins 5 and are in tight fit.

The other ends of the plurality of heat-conducting fins 5 are connected with each other through a fixing component; specifically, the fixing assembly includes a screw and a nut, and the screw and the nut are fixed in cooperation with the first mounting hole 521 provided at the end portion of the heat conductive sheet 5, so that the heat conductive sheet 5 contacts each flat conductor, and the heat conductive sheet 5 is prevented from falling off from the input bus bar 3 or the output bus bar 4.

The first embodiment is as follows:

the difference from the above embodiment is that: the heat conducting fins 5 only comprise heat conducting fins 5, the heat conducting fins 5 are arranged at intervals, and the flat conductors of any phase of the input bus 3 or/and the output bus 4 are clamped between the adjacent heat conducting fins 5 and are matched in a tight fit mode.

The tight fit mode is as follows: one end of each heat conducting fin 5 is provided with a second mounting hole, and the other end of each heat conducting fin is provided with a third mounting hole; the second mounting holes of the plurality of heat-conducting fins 5 are matched and fixed through screws and nuts; the third mounting holes of the plurality of heat-conducting fins 5 are fixed by screws and nuts in a matching manner, so that the heat-conducting fins 5 are attached to the flat conductors, and the heat-conducting fins 5 are prevented from falling off from the input bus 3 or the output bus 4.

The two examples of the flat conductors tightly fitted with the heat-conducting sheet 5 are only examples, and the flat conductors can be tightly fitted with the heat-conducting sheet 5 by other methods, which are within the scope of protection of the present disclosure.

The number and distribution of the heat-conducting fins 5 may be determined according to actual needs, in this example, the heat-conducting fins 5 are arranged at intervals on any phase of the input bus 3 or the output bus 4, and each phase may be provided with one or more groups.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An electrical device comprises a cabinet body (1), wherein an electrical element (2) is arranged in the cabinet body (1), one end of the electrical element (2) is electrically connected with an input bus (3), and the other end of the electrical element is electrically connected with an output bus (4); the input bus (3) comprises a one-phase or multi-phase input bus, and the output bus (4) comprises a one-phase or multi-phase output bus; each phase input bus and/or each phase output bus comprises a plurality of flat conductors which are arranged in parallel;

the method is characterized in that: and a heat conducting sheet (5) with the heat conductivity larger than 10W/(m.K) is arranged between two adjacent flat conductors in the input bus and/or the output bus of each phase, and the flat conductors are in contact with the heat conducting sheet (5).

2. The electrical apparatus of claim 1, wherein: the outer part of the flat conductor at the outermost side of the input bus and/or the output bus of each phase is also provided with a heat conducting sheet (5).

3. The electrical apparatus of claim 1, wherein: the heat conducting sheet (5) is made of copper or aluminum or ceramic.

4. The electrical apparatus of claim 1, wherein: one end of each of the plurality of heat-conducting fins (5) is fixedly connected with a base (51), and the other ends are connected with each other through a fixing component.

5. The electrical device of claim 4, wherein: the fixing assembly comprises a screw and a nut, and the screw and the nut are matched and fixed with the first mounting hole (521) arranged at the end part of the heat-conducting sheet (5) so that the heat-conducting sheet (5) contacts each flat conductor.

6. The electrical apparatus of claim 1, wherein: one end of each heat-conducting fin (5) is provided with a second mounting hole, and the other end of each heat-conducting fin is provided with a third mounting hole; the second mounting holes of the heat conducting fins (5) are matched and fixed through screws and nuts; and the third mounting holes of the multiple heat-conducting fins (5) are matched and fixed through screws and nuts.