KR20160045977A

KR20160045977A - Switching aparatus for molded case circuit breaker

Info

Publication number: KR20160045977A
Application number: KR1020140140633A
Authority: KR
Inventors: 윤대영; 김덕중; 박도현
Original assignee: 현대중공업 주식회사
Priority date: 2014-10-17
Filing date: 2014-10-17
Publication date: 2016-04-28

Abstract

A latch which is rotatably assembled to a latch pin provided on the pair of mounting plates; a latch which is rotated in association with the latch and is brought into contact with or separated from the fixed contact, A shielding member having a bar shape and fixed to the mounting plate to stop the rotation of the movable contactor by supporting the movable contactor when the movable contactor is separated from the stationary contactor, Disclosed is an apparatus for opening and closing a circuit breaker for a wiring breaker including an insulating member for preventing fusion of a member and the movable contact.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switching device for a wiring breaker,

The present invention relates to an opening / closing apparatus for a wiring breaker.

A circuit breaker is a power device that opens and closes a circuit in a power system, and automatically detects an abnormal current such as a short-circuit current or an overcurrent on the circuit to cut off the circuit.

In such a circuit breaker, the opening / closing mechanism sequentially discharges the stored elastic energy by triggering of a trip mechanism that senses an abnormal current conduction on the circuit, thereby sequentially rotating the movable contact away from the stationary contactor Means a mechanism that drives to a position.

On the other hand, since the movable contact member, which rotates when tripping due to a short-circuit accident, is in contact with the shield member at high speed and at the same time in surface contact, fusion between the shield member and the movable contact due to arcing and contact scattering between the movable contactor and the fixed contactor .

Korean Utility Model Registration No. 20-0455334

Provided is an opening / closing apparatus for a wiring breaker which can prevent fusion between a shield plate and a movable contact.

The opening and closing apparatus for a circuit breaker according to an embodiment of the present invention includes a pair of mounting plates spaced apart from each other, a latch rotatably mounted on the latch pin provided on the pair of mounting plates, A movable contact having a bar shape and fixed to the mounting plate to support the movable contact when the movable contact is separated from the stationary contactor so as to rotate the movable contact, And an insulating member assembled to the shielding member to prevent fusion of the shielding member and the movable contact.

The insulating member may have a band shape and may be assembled to the shield member so as to surround the central portion of the shield member.

The insulating member may be made of a rubber material.

The shielding member may be composed of a first shielding member having a circular cross section.

It is possible to prevent fusion between the shield plate and the movable contactor.

1 is a side view showing an opening / closing apparatus for a circuit breaker according to an embodiment of the present invention.
2 is a cross-sectional view showing an opening and closing apparatus for a wiring breaker according to an embodiment of the present invention.
3 is an enlarged view showing part A of Fig.
4 is a perspective view showing a shielding member and an insulating member provided in an opening and closing apparatus for a circuit breaker according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

FIG. 1 is a side view showing an apparatus for opening and closing a circuit breaker according to an embodiment of the present invention, and FIG. 2 is a sectional view showing an apparatus for opening and closing a circuit breaker according to an embodiment of the present invention.

1 and 2 illustrate a circuit breaker 100 according to an embodiment of the present invention. The circuit breaker 100 includes a mounting plate 110, a latch 120, a movable contactor 130, a shielding member 140, ).

The mounting plates 110 are spaced from each other and made of a pair. That is, the mounting plate 110 is fixed to the apparatus body 101 and functions as a base on which the latch 120, the shielding member 140, and the like are installed. The mounting plates 110 are spaced apart from each other so as to accommodate the latch 120 and the shielding member 140 inside the mounting plate 110 and the mounting of the latch 120 and the shielding member 130 A plurality of holes may be provided.

The lever 102 may be rotatably installed on the mounting plate 110 and the upper end of the lever 102 may be connected to the handle 103 although not shown in detail in the drawings. The handle 103 is connected to the lever 102 as an operating means for manually opening and closing, i.e., turning on or off the circuit breaker, and is rotated in association with the lever 102.

The latch 120 is rotatably assembled to the latch pin 122 provided on the mounting plate 110 described above. That is, the latch 120 is rotatably installed around the latch pin 122. On the other hand, the latch 120 is a means for restricting the trip spring to be held in a compressed or tensioned state so that elastic energy for a trip operation is retained. When the latch 120 is held by a latch holder (not shown), the trip spring holds the elastic energy. When the latch 120 is released from the latch holder, the trip spring is restored by the elastic energy Lt; / RTI >

The movable contact 130 is rotated in conjunction with the latch 120 and can be contacted or disconnected from the fixed contact 10. That is, the movable contactor 130 is rotatably installed around the shaft 104 of the apparatus main body 101.

The shielding member 140 is fixed to the mounting plate 110 and supports the movable contactor 130 when the movable contactor 130 is detached from the fixed contactor 10 to stop the rotation of the movable contactor 130. Further, the shielding member 140 has a bar shape.

The shielding member 140 blocks an arc generated between the stationary contactor 10 and the movable contactor 130 from flowing into the inside.

Hereinafter, the shield member 140 and the insulating member 150 will be described with reference to FIGS. 3 and 4. FIG.

The shielding member 140 may be composed of first and second shielding members 142 and 144 having a circular cross section, and the first and second shielding members 142 and 144 are disposed side by side. Both ends of the first and second shielding members 142 and 144 are smaller in diameter than the central portion in order to be mounted on the mounting plate 110 described above.

The insulating member 150 is assembled to the shielding member 140 to prevent fusion of the shielding member 140 and the movable contactor 130. The insulating member 150 has a band shape and may be assembled to the shielding member 140 so as to surround the central portion of the shielding member 140. Further, the insulating member 150 may be made of a rubber material.

As described above, since the insulating member 150 is provided on the shield member 140, the fusing phenomenon between the movable contactor 130 and the shield member 140 can be more completely suppressed, The manufacturing cost can be reduced and the manufacturing yield can be improved.

Hereinafter, the operation of the switching device for a wiring breaker according to an embodiment of the present invention will be described. The operation of the above-described switching device for a wiring breaker will be described with reference to the drawings.

First, when a trip mechanism (not shown) detects the occurrence of an accident current such as a short circuit current in a circuit in which a wiring breaker is contacted in an on state and releases the latch 120, the latch (not shown) 120 rotate counterclockwise.

At this time, the latch 120 is rotated until it comes into contact with the support member 108.

Meanwhile, the latch 120 and the shaft 104 may be connected via an upper link and a lower link (not shown). That is, the upper link is connected to the latch 120 and the lower link is connected to the shaft 104. The upper link and the lower link are connected to each other by an intermediate link pin, and the lower end of the trip spring is connected to the intermediate link pin and the upper end is connected to the handle 103.

In addition, when the trip spring is restored, that is, when the trip spring is restored to the original state in the pulled state, the lower end portion of the trip spring pulls the intermediate link pin upward. As a result, The lower link is linearly expanded, and the lower link rotates the shaft 104 connected to the lower end in the clockwise direction.

Thereby, the movable contactor 130 is separated from the fixed contactor 10 while the movable contactor 130 is rotated clockwise. The movable contactor 130 is rotated until it is supported by the shielding member 140 and stopped by the first and second shielding members 142 and 144. That is, the movable contactor 130 is rotated and stopped until it contacts the insulating member 150 assembled with the shielding member 140.

As described above, since the movable contact 130 contacts the insulating member 150 made of a rubber material, it is possible to prevent fusion of the movable contact 130 and the shielding member 140 due to arc and contact scattering.

In addition, since the insulating member 150 has a band shape and is assembled to the shielding member 140 so as to surround the central portion of the shielding member 140, the insulating member 150 can be easily installed and the manufacturing cost can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

100: Switching device for wiring breaker
110: Mounting plate
120: latch
130:
140: shield member
150: Insulation member

Claims

A pair of mounting plates mutually spaced apart;
A latch rotatably assembled to a latch pin installed on the pair of mounting plates;
A movable contact pivotally coupled with the latch and being contacted with or separated from the fixed contactor;
A shielding member having a bar shape and fixed to the mounting plate to stop the rotation of the movable contactor by supporting the movable contactor when the movable contactor is separated from the fixed contactor; And
An insulating member assembled to the shield member to prevent fusion of the shield member and the movable contact;
Closing device for a wiring breaker.

The method according to claim 1,
Wherein the insulating member has a strip shape and is assembled to the shielding member so as to surround the central portion of the shielding member.

3. The method of claim 2,
Wherein the insulating member is made of a rubber material.

3. The method of claim 2,
Wherein the shielding member comprises a first and a second shielding member having a circular cross section.