CN107045964B

CN107045964B - Multipolar circuit breaker return circuit structure

Info

Publication number: CN107045964B
Application number: CN201610082826.6A
Authority: CN
Inventors: 于贻鹏; 蔡瑜昌; 张颖; 刘智操; 蒋武山
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Liangxin Electrical Appliances (Haiyan) Co.,Ltd.; Shanghai Liangxin Electrical Co Ltd
Priority date: 2016-02-05
Filing date: 2016-02-05
Publication date: 2020-02-21
Anticipated expiration: 2036-02-05
Also published as: CN107045964A

Abstract

The utility model provides a multipolar circuit breaker return circuit structure, it includes the circuit breaker base, and 3 at least groups moving contacts are adorned on the main shaft, and each inter-insulated between the moving contact of each group after the installation, moving contact can rotate around the main shaft, and every group moving contact all has the static contact or static contact and the explosion chamber that correspond, and the main shaft is adorned on the circuit breaker base, its characterized in that: the group of moving contacts and the fixed contacts corresponding to the group of moving contacts which are separated from each other are connected through a conductor, and after the moving contacts and the fixed contacts are connected through the mode, a same-polarity or same-phase pole which is provided with at least two breakpoints and is connected in series at intervals is formed, and the two groups of moving contacts can independently rotate relative to the main shaft. The invention effectively improves the breaking performance and prolongs the service life of the circuit breaker.

Description

Multipolar circuit breaker return circuit structure

Technical Field

The invention belongs to the technical field of circuit breakers, and particularly relates to a multi-pole circuit breaker loop structure.

Background

With the development of new energy technology, higher requirements are put forward on low-voltage electrical appliance elements. Especially in photovoltaic power DC systems, the rated operating voltage of the low-voltage appliances is even as high as DC 1500V. The breaking performance of the circuit breaker can be improved by adopting a multi-breakpoint series connection method. At present, the external wiring terminal of the circuit breaker is connected in the market, two poles or more poles of the circuit breaker are connected in series to form a series connection breakpoint, and the requirement of high working voltage can be met. And another connection mode is an internal connection mode, two poles or more poles of the circuit breaker are connected in series to form series connection breakpoints, the chinese patent 201010527233.9 discloses a multi-breakpoint plastic shell type circuit breaker, which adopts a preset connection mode, in an insulating shell, every two adjacent groups of moving contacts are connected through a conductor, or a group of moving contacts and a static contact corresponding to an adjacent group of moving contacts are connected through a conductor, and after the moving contacts are connected through any mode, a same-polarity or same-phase pole with at least two breakpoints connected in series is formed, and the two groups of moving contacts can independently rotate relative to an insulating rotating shaft. A plurality of breakpoints are connected in series in the shell of the circuit breaker, and a user does not need to connect the wiring at the wiring terminal for connecting the breakpoints in series. However, if the connection mode of the circuit structure of the multi-pole circuit breaker adopts a mode that two adjacent groups of moving contacts are connected through a conductor, the breaking capacity is not greatly improved, and the outer end electric connection wiring needs to be connected in a cross-phase mode; if a group of moving contacts and a group of adjacent moving contacts are connected through a conductor, the current flow direction between the two adjacent moving contacts is the same, the interphase influence is large, the extinguishing of electric arcs can be adversely affected under the electromagnetic action between adjacent loops under the action of high voltage and large current, and the breaking capacity can not be improved by well playing the role of multi-break points.

Disclosure of Invention

The invention aims to solve the technical defects that the conventional connection mode of multi-pole breakpoints of a circuit breaker is complex in wiring mode and the same-direction current is easy to interfere, and provides a multi-breaker loop structure, so that a user does not need to wire at a wiring terminal for the purpose of connecting the breakpoints in series, the requirement of improving the working voltage by adopting the multi-break series mode can be met, heat accumulation can be transmitted into the circuit breaker as little as possible, the influence on a bimetallic strip and related elements is reduced, the original external-end wiring mode can not be changed, the breaking performance is effectively improved, and the service life of the circuit breaker is prolonged.

Technical scheme

In order to achieve the technical purpose, the invention designs a multi-pole circuit breaker loop structure, which comprises a circuit breaker base, wherein at least 3 groups of moving contacts are arranged on a main shaft, the moving contacts are insulated from each other after installation, the moving contacts can rotate around the main shaft, each group of moving contacts is provided with a corresponding static contact or a static contact plate and an arc extinguish chamber, and the main shaft is arranged on the circuit breaker base, and the multi-pole circuit breaker loop structure is characterized in that: the group of moving contacts and the static contact plate corresponding to the group of moving contacts which are separated from each other are connected through a conductor, and after the moving contacts and the static contact plate are connected through the mode, a same-polarity or same-phase pole which is provided with at least two breakpoints and connected in series at intervals is formed, and the two groups of moving contacts can independently rotate relative to the main shaft.

Furthermore, the moving contact comprises a moving contact part and a connecting part, the connecting part is connected to the static contact plate which separates the phases through a conductor, the static contact plate which separates the phases comprises a static silver point part and a pole connection part, the conductor is connected with the pole connection part, and the static silver point part is arranged at the mounting hole of the circuit breaker base.

Further, the conductor corresponds to an external wiring portion of the busbar, and the busbar is installed in a busbar connection groove of the circuit breaker base.

Furthermore, separate the quiet touch panel of looks for the Z style of calligraphy, separate the fixed dress of the quiet touch panel of looks on the outer bottom surface of circuit breaker base.

Further, the inner wiring part of the busbar is connected with the conductors corresponding to the group of moving contacts which are separated from each other.

Advantageous effects

The multi-pole circuit breaker loop structure provided by the invention does not need a user to automatically wire at a wiring terminal for connecting breakpoints in series, can meet the requirement of improving the working voltage by adopting a multi-breakpoint series connection mode, can transfer heat accumulation to the interior of the circuit breaker as little as possible, reduces the influence on a bimetallic strip and related elements, and can effectively improve the breaking performance and prolong the service life of the circuit breaker without changing the original external end wiring mode.

Drawings

Fig. 1 is a schematic view of the mounting structure of the first embodiment of the present invention.

Fig. 2 is a schematic circuit structure of the first embodiment of the present invention.

Fig. 3 is a schematic structural view of a fixed contact in the first embodiment of the present invention.

Fig. 4 is a schematic structural view of a stationary contact plate according to a first embodiment of the present invention.

Fig. 5 is a schematic view of a conductor structure in a first embodiment of the invention.

Fig. 6 is a schematic view of the base structure in the first embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a movable contact in the first embodiment of the invention.

Fig. 8 is a schematic diagram of a busbar structure according to a first embodiment of the invention.

Detailed Description

The invention is further explained below with reference to the figures and examples.

Example 1

As shown in the attached drawings 1-8, a multi-pole circuit breaker loop structure comprises a circuit breaker base 1, at least 3 groups of moving contacts 2, 2 ' are arranged on a main shaft 3, the moving contacts 2, 2 ' are mutually insulated after installation, the moving contacts 2, 2 ' can rotate around the main shaft 3, each group of moving contacts 2 is provided with a corresponding static contact 4 or a static contact plate 4 ' and an arc extinguish chamber 5, the main shaft 3 is arranged on the circuit breaker base 1, wherein, one group of moving contacts 2 and the static contact plate 4 ' corresponding to one group of moving contacts 2 ' in an alternate phase are connected through a conductor 6, a same-polarity or same-phase pole with at least two break points in alternate series connection is formed, and the moving contacts 2, 2 ' can independently rotate relative to the main shaft 3.

The moving contact 2 comprises a moving contact part 201 and a connecting part 202, the connecting part 202 is connected to a stationary contact plate 4 'of a separated phase through a conductor 6, the stationary contact plate 4' comprises a stationary silver point part 401 and a pole connection part 402, the conductor 6 is connected with the pole connection part 402, and the stationary silver point part 401 is arranged at the mounting hole 101 of the circuit breaker base 1.

The conductor 6 corresponds to an external wiring portion 701 of the busbar 7, and the busbar 7 is installed in a busbar connection groove 702 of the circuit breaker base 1.

Specifically, the static contact plate 4 'is Z-shaped, and the static contact plate 4' is fixedly arranged on the outer bottom surface of the circuit breaker base 1.

The inner connecting part 703 of the busbar 7 is connected with the conductor 6' corresponding to a group of spaced moving contacts 2 ".

Example 2

Two groups of moving contacts separated in a phase in the circuit breaker base are connected through a conductor to form a same-polarity or same-phase pole which is provided with at least two breakpoints and is connected in series at intervals, and the two groups of moving contacts 2 can independently rotate relative to the main shaft 3.

The invention provides a multi-pole circuit breaker loop structure, wherein moving and static silver points of an external wiring part of a bus bar are connected in series with a conductor through a static contact plate to form a current branch, the branch is provided with at least two breakpoints, and a user does not need to wire at a wiring terminal for the purpose of connecting the breakpoints in series, so that the requirement of improving working voltage by adopting a multi-breakpoint series connection mode can be met, heat accumulation can be transmitted into the circuit breaker as little as possible, the influence on a bimetallic strip and related elements is reduced, the original external end wiring mode can not be changed, the breaking performance is effectively improved, and the service life of the circuit breaker is prolonged.

The structure, ratio, size and the like shown in the drawings of the present embodiment are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the limit conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right", "middle", "clockwise" and "counterclockwise" used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the substantial changes, but also considered to be the scope of the present invention.

Claims

1. The utility model provides a multipolar circuit breaker return circuit structure, it includes the circuit breaker base, and 3 at least groups moving contacts are adorned on the main shaft, and each inter-insulated between the moving contact of each group after the installation, moving contact can rotate around the main shaft, and every group moving contact all has the static contact or static contact and the explosion chamber that correspond, and the main shaft is adorned on the circuit breaker base, its characterized in that: the group of moving contacts and the fixed contacts corresponding to the group of moving contacts which are separated from each other are connected through a conductor, and after the moving contacts and the fixed contacts are connected through the mode, a same-polarity or same-phase pole which is provided with at least two breakpoints and is connected in series at intervals is formed, and the two groups of moving contacts can independently rotate relative to the main shaft.

2. A multiple pole circuit breaker circuit structure as in claim 1, wherein: the moving contact comprises a moving contact part and a connecting part, the connecting part is connected to a static contact plate which separates the phases through a conductor, the static contact plate which separates the phases comprises a static silver point part and a pole connection part, the conductor is connected with the pole connection part, and the static silver point part is arranged at a mounting hole of the circuit breaker base.

3. A multiple pole circuit breaker circuit structure as in claim 1, wherein: the conductor corresponds to an external connection part of the busbar, and the busbar is arranged in a busbar connection groove of the circuit breaker base.

4. A multiple pole circuit breaker circuit structure as in claim 2, wherein: the static contact plate separating the phases is Z-shaped, and the static contact plate separating the phases is fixedly arranged on the outer bottom surface of the circuit breaker base.

5. A multiple pole circuit breaker circuit structure as in claim 3, wherein: and the inner wiring part of the busbar is connected with the conductors corresponding to the group of moving contacts separated from each other.