CN217984064U

CN217984064U - Lightning protection module for direct current breaker

Info

Publication number: CN217984064U
Application number: CN202221639661.5U
Authority: CN
Inventors: 朱华; 谢飞
Original assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Current assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-12-06
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses a lightning protection module for direct current breaker sets up in direct current breaker's power or load end, its characterized in that, and lightning protection module includes gas discharge tube and fixed mounting in the shell fragment at gas discharge tube both ends, can fix a position and compress the shell fragment when lightning protection module assembly is between the positive negative pole copper bar of direct current breaker. The utility model discloses lightning protection module connection reliability is high, and the convenient easy maintenance of dismouting.

Description

Lightning protection module for direct current breaker

Technical Field

The utility model relates to an electrical equipment technical field especially relates to the circuit breaker, is a lightning protection module for direct current circuit breaker more particularly.

Background

The circuit breaker is a switching device capable of closing, carrying and opening/closing a current under a normal circuit condition and closing, carrying and opening/closing a current under an abnormal circuit condition within a prescribed time. The circuit breaker sets up lightning protection module usually and effectively absorbs the thunder and lightning surge, protects the safety of circuit and consumer, improves circuit breaker protect function's reliability. The lightning protection module (such as a gas discharge tube) installed on the existing circuit breaker mostly adopts direct welding or is installed to a main circuit of the circuit breaker through a wiring screw after being welded by a circuit board, the number of parts of the module is large, the whole structure is complex, and the circuit breaker is not easy to maintain.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a direct current is lightning protection module for circuit breaker to the dismouting is maintained.

For solving above technical problem, the utility model provides a technical scheme is:

the utility model provides a lightning protection module for direct current breaker sets up in direct current breaker's power or load end, and lightning protection module includes gas discharge tube and the shell fragment of fixed mounting at gas discharge tube both ends, can fix a position and compress the shell fragment when lightning protection module assembly is between the positive negative pole copper bar of direct current breaker.

Furthermore, the elastic sheet comprises a substrate and a plurality of claw-shaped bulges which are arranged on the substrate and can flexibly deform.

Further, the base is fixed to the end face of the gas discharge tube by welding.

Further, the claw-shaped protrusions are integrally connected with the base.

Further, the claw-shaped bulge is approximately in an inverted V shape, and the lower part of the claw-shaped bulge is wide and the upper part of the claw-shaped bulge is narrow.

Further, the claw-shaped protrusions are plural.

Further, the plurality of claw-shaped protrusions are arranged in a ring shape.

Further, a gap is reserved between the adjacent claw-shaped bulges.

Furthermore, the positive and negative copper bars are provided with mounting holes, and the claw-shaped protrusions of the lightning protection module elastic pieces are embedded into the mounting holes.

Furthermore, a contact and arc extinguishing unit comprising a moving contact system, a fixed contact and shunt detection system and an arc extinguishing system, a manual protection dynamic operation unit, an electric operation unit, a bidirectional magnetic latching transient protection unit and an electronic control and man-machine interaction unit are arranged in a shell of the direct current circuit breaker, and two ends of the shell are respectively provided with an inlet end for a main circuit and a control signal connection wire and an outlet end for a main circuit quick connection wire.

Compared with the prior art, the utility model provides a both ends are equipped with the lightning protection module of shell fragment, can clamp between the main loop is just, burden copper bar, and its simple structure connects the reliability height, and the dismouting is convenient easily to be maintained.

Drawings

Fig. 1 is a schematic structural diagram of the dc circuit breaker of the present invention;

fig. 2 is a three-dimensional schematic view of the lightning protection module for the dc circuit breaker of the present invention;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a three-dimensional schematic view of the spring plate of FIG. 2;

fig. 6 is a front view of fig. 5.

Detailed Description

Referring to fig. 1, a structure of the dc circuit breaker of the present invention is shown. The direct current breaker is driven by a direct-acting type, and the maximum distance between a moving contact and a static contact of the direct current breaker is L as shown in figure 1. The circuit breaker can be operated manually or electrically, wherein the right direction is a closing direction, and the left direction is an opening direction.

As shown in fig. 1, the dc circuit breaker is provided with a housing 10, which is convenient for mounting in a power distribution cabinet. A contact and arc extinguishing unit, which is a core unit of the circuit breaker, is disposed in the housing 10. Two ends of the outer shell 10 are respectively provided with a wire inlet end 7 and a wire outlet end 8, wherein the wire inlet end 7 is used for main circuit and control signal wiring, and the wire outlet end 8 is used for main circuit fast wiring.

As shown in fig. 1, the contact and arc extinguishing unit is composed of a moving contact system 4, a fixed contact and shunt detection system 5, an arc extinguishing system 6 and the like, and is correspondingly provided with a manual protection operation unit 1, an electric operation unit 2 and a snap protection unit 3, wherein the snap protection unit 3 is preferably a bidirectional magnetic holding device. In addition, the circuit breaker is also provided with an electronic control and man-machine interaction unit to improve the intelligent degree of the product.

The utility model discloses a direct current circuit breaker sets up lightning protection module 11, and it is installed between direct current circuit breaker's positive negative pole copper bar, specifically is parallelly connected at power or load end.

This lightning protection module adopts gas discharge tube (generally be dipolar discharge tube and tripolar discharge tube, because the encapsulation shell material is mostly pottery, so also called ceramic discharge tube), its theory of operation is gas gap discharge, when appling certain voltage between the discharge tube the two poles of the earth, just produce inhomogeneous electric field between interelectrode, under this electric field effect, intraductal gas begins freely, when impressed voltage increases to make interelectrode field intensity exceed gaseous dielectric strength, the clearance between the two poles of the earth will discharge the breakdown, turn into conductive state by original insulating state, the residual voltage level of deciding in the discharge arc way is maintained to the voltage that switches on between the two poles of the earth of back discharge tube, this kind of residual voltage is generally very low, thereby make and discharge the parallelly connected electronic equipment of tube avoid the damage of overvoltage.

The utility model discloses improve the gas discharge tube mounting structure in the lightning protection module 11, specifically as follows.

Referring to fig. 2 to 6, the structure of the lightning protection module for the dc breaker is shown. The lightning protection module 11 is clamped between positive and negative copper bars of the dc circuit breaker and is connected in parallel to the power supply or load side, as further described below.

The lightning protection module comprises a gas discharge tube 1101 and elastic sheets 1102 welded at two ends of the gas discharge tube, wherein each elastic sheet 1102 comprises a base 1102b and a plurality of flexibly-deformable claw-shaped protrusions 1102a connected to the base 1102b, the claw-shaped protrusions 1102a are integrally connected with the base 1102b, the base 1102b is welded to the end face of the gas discharge tube 1101 through soldering tin 1103, and the base 1102b can also be fixedly installed on the end face of the gas discharge tube 1101 through bonding and other modes; the plurality of claw-shaped protrusions 1102a are annularly arranged, each claw-shaped protrusion 1102a is approximately inverted V-shaped, the lower width of each claw-shaped protrusion is narrow, a gap is reserved between every two adjacent claw-shaped protrusions 1102a, the width of the gap is smaller than that of each claw-shaped protrusion, and therefore the elastic sheet 1102 is easy to deform, and the stability of the whole structure is good.

Lightning protection module's initial height dimension A ', positive negative copper bar interval A of circuit breaker, A are less than lightning protection module initial height dimension A ', and just positive negative copper bar is last porosely, can cooperate with shell fragment 1102, so can fix a position and compress shell fragment 1102 when lightning protection module 11 clamps between the copper bar, and then form initial pressure, ensure that the contact is reliable.

The utility model discloses in, array distribution has the protruding 1102a of claw type that the compliance warp on the shell fragment, pushes down and forms initial pressure F after warping for the height of shell fragment 1102 descends to H1 from H0. In order to facilitate the assembly of the lightning protection module 11, mounting holes are formed in the positive and negative copper bars, and the claw-shaped protrusions 1102a on the elastic pieces 1102 at the two ends of the lightning protection module are embedded into the mounting holes so as to realize positioning and clamping and are not easy to separate.

The utility model discloses be equipped with the shell fragment at gas discharge tube's both ends, the lightning protection module of this kind of new construction, simple structure has maintainability, easy dismouting, and it is high to connect the reliability, can bear the 15kA thunderbolt.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that the present invention is not limited to the disclosed embodiments, and those skilled in the art can make modifications and changes without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a lightning protection module for direct current breaker, sets up in direct current breaker's power or load end, its characterized in that, lightning protection module include gas discharge tube and fixed mounting in the shell fragment at gas discharge tube both ends, can fix a position and compress the shell fragment when lightning protection module assembly is between the positive negative pole copper bar of direct current breaker.

2. The lightning protection module according to claim 1, wherein the resilient sheet comprises a base and a plurality of claw-shaped protrusions disposed on the base and capable of flexibly deforming.

3. The lightning protection module for a dc circuit breaker according to claim 2, wherein the substrate is fixed to the end face of the gas discharge tube by welding.

4. The lightning protection module for a dc circuit breaker according to claim 2, wherein the claw-shaped protrusion is integrally connected to the base.

5. The lightning protection module for dc circuit breaker according to claim 2, wherein the claw-shaped protrusion is approximately in an inverted V shape and has a lower width and an upper width.

6. The lightning protection module for dc circuit breaker according to claim 2, wherein the claw-shaped protrusion is plural.

7. The lightning protection module for a dc circuit breaker according to claim 6, wherein the plurality of claw-shaped protrusions are arranged in a ring shape.

8. The lightning protection module for a dc circuit breaker according to claim 7, wherein a gap is left between adjacent claw-shaped protrusions.

9. The lightning protection module for a dc circuit breaker according to claim 2, wherein the positive and negative copper bars are provided with mounting holes, and the claw-shaped protrusions of the lightning protection module spring are inserted into the mounting holes.

10. The lightning protection module for a dc circuit breaker according to any one of claims 1 to 9, wherein the dc circuit breaker has a housing, and the housing has a moving contact system, a static contact and shunt detection system, a contact and arc extinguishing unit of the arc extinguishing system, a manual protection operating unit, an electric operating unit, a bidirectional magnetic latching snap-action protection unit, and an electronic control and man-machine interaction unit, and the housing has an incoming end for the main circuit and the control signal connection and an outgoing end for the main circuit fast connection.