CN209329545U

CN209329545U - A kind of open frame circuit breaker

Info

Publication number: CN209329545U
Application number: CN201920346910.3U
Authority: CN
Inventors: 陈斌; 钱锦丰; 朱永清
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2019-08-30
Anticipated expiration: 2029-03-19

Abstract

A kind of open frame circuit breaker belongs to low voltage electrical apparatus technology field.Breaker includes drawer chassis, and drawer chassis includes a pair of side plates, the chassis between a pair of side plates, is equipped with busbar on chassis, and busbar is electrically connected contact bridge；Feature is: busbar includes bus block, is equipped with the connecting cross beam for being electrically connected with touching bridge in the side of bus block, radiating ribs are equipped on the side of connecting cross beam or be additionally provided on connecting cross beam on bus block.The heat dissipation effect for accelerating busbar can effectively reduce the temperature rise near busbar, improve the performance and used life of breaker.

Description

A kind of open frame circuit breaker

Technical field

The utility model belongs to low voltage electrical apparatus technology field, and in particular to a kind of open frame circuit breaker.

Background technique

Drawer type universal circuit breaker (hereinafter referred to as breaker) is well known circuit protection device, it usually needs negative for a long time The operating current of kilo-ampere is carried, breaker can generate larger heat under current vortex and the effect of galvanic circle electrical impedance, therefore Breaker often temperature rise with higher.And higher temperature rise becomes the working environment of breaker badly, it is many unfavorable to bring, The pernicious phenomenon of the accelerated oxidation of the premature aging, contact point that such as cause insulating part, leverages the service life of breaker. Therefore, the temperature rise that breaker is effectively reduced becomes one of the key of research.

Especially near the touching bridge of drawer type universal circuit breaker, since touching bridge both ends are the contact that is electrically connected of clamped-in style, It generates heat relatively high, and the drawer seat bottom frame part where touching bridge has certain closure, therefore, the space where touching bridge is easy Generate higher temperature rise.The heat dissipation for how accelerating busbar in the drawer seat bottom frame being electrically connected with touching bridge, is always industry institute The key problem of concern.

Summary of the invention

The task of the utility model is to provide a kind of open frame circuit breaker, helps to improve busbar structure and be able to The heat dissipation effect for accelerating the busbar of touching bridge electrical connection, advantageously reduces the temperature rise of busbar and is improved breaker Performance and used life.

What the task of the utility model was performed by, a kind of open frame circuit breaker, the breaker includes drawer Seat, the drawer chassis include a pair of side plates, the chassis between a pair of side plates, and conductive mother is equipped on the chassis Line, the busbar are electrically connected contact bridge；The busbar includes bus block, is equipped with and uses in the side of the bus block In the connecting cross beam being electrically connected with touching bridge, on the side that the bus block is equipped with connecting cross beam or on the connecting cross beam It is additionally provided with radiating ribs.

In a specific embodiment of the utility model, the connecting cross beam is two, between two connecting cross beams Every being arranged side by side, the radiating ribs are located on the bus block, and the radiating ribs are located between two connecting cross beams.

In another specific embodiment of the utility model, the radiating ribs are strip projected parts.

In another specific embodiment of the utility model, the cross section of the radiating ribs is that end is circular Rectangle.

In another specific embodiment of the utility model, the cross section of the radiating ribs is that end is triangle Shape.

In a specific embodiment in turn of the utility model, the cross section of the radiating ribs is that end is isosceles Triangle.

In the utility model again and then in a specific embodiment, the connecting cross beam is two, and described dissipates Hot muscle is located on side opposite on two connecting cross beams.

The utility model has the advantages that due to the above structure, through the improvement to busbar structure, The heat dissipation effect for accelerating the busbar being electrically connected with touching bridge, can effectively reduce the temperature rise near busbar, improve open circuit The performance and used life of device.

Detailed description of the invention

Fig. 1 is the partial structure diagram of drawer chassis in the breaker of the utility model.

Fig. 2 is busbar scheme of installation in drawer chassis described in the utility model.

Fig. 3 is busbar schematic diagram described in the utility model.

Fig. 4 is the schematic diagram that busbar described in the utility model is electrically connected with touching bridge.

In figure: 1. side plates；2. chassis；3. busbar, 31. bus blocks, 32. connecting cross beams, 321. fixed cavitys, 33. Radiating ribs；4. outlet row；5. touching bridge.

Specific embodiment

Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing, but is not to the description of embodiment Limitation to technical solution, it is any to change in the form rather than substance that all to should be considered as this practical new according to the utility model design The protection scope of type.

Referring to FIG. 1 to FIG. 4, the utility model relates to a kind of open frame circuit breaker, the breaker includes drawer chassis, The drawer chassis includes a pair of side plates 1, and the side plate 1 is metal plate, usually by metal plate through works such as aperture, punching press bumps Skill is process.Described a pair of side plates 1 symmetrically, is respectively separated the two sides for being placed in drawer chassis.

Between described a pair of side plates 1, and be located on rear side of drawer chassis and multiple chassis 2 be installed, the chassis 2 by Thermosetting material is made, usually DMC or BMC.The quantity of the chassis 2 is determined by the number of poles of breaker.Example is as mentioned Breaker is three-pole breaker, then is spliced side by side using three chassis 2.If the breaker is four-pole circuit breaker, It is spliced side by side using four chassis 2.Busbar 3 is installed in the chassis 2.The busbar 3 is usual It is made of conductive metal, such as copper.The busbar 3 is electrically connected with the touching bridge 5.Specifically, working as the conduction When bus 3 also needs connection outlet row 4, described 3 one end of busbar is electrically connected contact bridge 5, and the other end is electrically connected outlet row 4.And Described 4 one end of outlet row is electrically connected with the busbar 3, the other end is electrically connected with busbar in cabinet, thus will be described Breaker access power distribution network in.If the busbar 3 is a whole row with outlet function, the conduction is female Line 3 need to be only electrically connected with touching bridge 5, and busbar 3 is directly electrically connected with busbar in cabinet far from one end of the touching bridge 5, Completing will be in the breaker access power distribution network.

In the present invention, the busbar 3 includes bus block 31, and it is horizontal to be equipped with connection in the side of bus block 31 Beam 32, the connecting cross beam 32 are at least more than one, and in the present embodiment, the connecting cross beam 32 is preferably two. Two intervals of connecting cross beam 32 are arranged side by side.The fixation for clamping for touching bridge 5 is equipped on the head of the connecting cross beam 32 Cavity 321, the fixation cavity 321 is a pair, positioned at the two sides on the head of each connecting cross beam 32.It is main in the utility model The distinctive points wanted are: being additionally provided with heat dissipation on the ipsilateral bus block 31 of the connecting cross beam 32 or on the connecting cross beam 32 Muscle 33.Specifically, the radiating ribs 33 can be located on bus block 31 towards on the one side of connecting cross beam 32, the heat dissipation The stretching direction of muscle 33 is consistent with the stretching direction of connecting cross beam 32.The radiating ribs 33 may be alternatively located at connecting cross beam On 32, it is preferred that on two connecting cross beams 32 on opposite side.The cross section of the radiating ribs 33 can be end For circular rectangle.The cross section of the radiating ribs 33 may be that end is triangle, it is preferable that the radiating ribs 33 Cross section is that end is isosceles triangle.The shape of the radiating ribs 33 is unrestricted, if its be can increase it is scattered The protrusion of heat area all should belong to the protection range of the utility model.In the present embodiment, the shape of the radiating ribs 33 is excellent It is selected as strip projected parts.After having added radiating ribs 33, it is capable of increasing bus block 31 and touches the contact surface of bridge inner space, to have The heat dissipation effect for improving to effect the busbar 3, reduces the temperature rise of breaker.

Preferably, when the radiating ribs 33 are located on conducting block 31, the position of the radiating ribs 33 is located at described Two connecting cross beams 32 between, advantage in the position is set and is: will not influence busbar 3 and touch bridge 5 between company Installation is connect, while installation of the busbar 3 between chassis 2 itself will not be influenced.

Claims

1. a kind of open frame circuit breaker, the breaker includes drawer chassis, and the drawer chassis includes a pair of side plates (1), position Chassis (2) between a pair of side plates (1) is equipped with busbar (3), the busbar on the chassis (2) (3) be electrically connected contact bridge (5)；It is characterized by: the busbar (3) includes bus block (31), in the bus block (31) Side be equipped with for touching bridge (5) connecting cross beam (32) that be electrically connected, in the bus block (31) equipped with connecting cross beam (32) Side on or on the connecting cross beam (32) be additionally provided with radiating ribs (33).

2. a kind of open frame circuit breaker according to claim 1, it is characterised in that the connecting cross beam (32) is two, Two connecting cross beam (32) intervals are arranged side by side, and the radiating ribs (33) are located on the bus block (31), and described Radiating ribs (33) are located between two connecting cross beams (32).

3. a kind of open frame circuit breaker according to claim 1, it is characterised in that the radiating ribs (33) are that strip is convex It rises.

4. a kind of open frame circuit breaker according to claim 1, it is characterised in that the cross section of the radiating ribs (33) It is circular rectangle for end.

5. a kind of open frame circuit breaker according to claim 1, it is characterised in that the cross section of the radiating ribs (33) It is triangle for end.

6. a kind of open frame circuit breaker according to claim 5, it is characterised in that the cross section of the radiating ribs (33) It is isosceles triangle for end.

7. a kind of open frame circuit breaker according to claim 1, it is characterised in that the connecting cross beam (32) is two, The radiating ribs (33) are located on side opposite on two connecting cross beams (32).