KR20160117062A

KR20160117062A - Switching device for molded case circuit breaker

Info

Publication number: KR20160117062A
Application number: KR1020150045666A
Authority: KR
Inventors: 박도현; 백기호; 김덕중
Original assignee: 현대중공업 주식회사
Priority date: 2015-03-31
Filing date: 2015-03-31
Publication date: 2016-10-10

Abstract

According to the present invention, a switching device of a molded case circuit breaker comprises: a fixed contactor fixedly installed in a case; and a movable contactor rotatably installed in a structure inside the case to come into contact with or be separated from the fixed contactor. The movable contactor has a heat radiation fin having a protrusion structure to discharge heat generated when the movable contactor comes into contact with or is separated from the fixed contactor. The switching device can improve heat dissipation performance of the circuit breaker by a simple structure.

Description

TECHNICAL FIELD [0001] The present invention relates to a switching device for a wiring breaker,

The present invention relates to an apparatus for opening and closing a circuit breaker for opening and closing a circuit in a power system and automatically detecting an abnormal current such as a short-circuit current or an overcurrent on the circuit to shut off the circuit.

Generally, MCCB (Molded Case Circuit Breaker) is a function to open or close a load in transmission, substation or electric circuit by using electromagnet or bimetal, to automatically cut off current when an accident such as grounding or short circuit occurs And a function of switching the electric line to the open or closed state by the user's operation.

In such a circuit breaker, a trip mechanism for detecting the abnormal current conduction on the circuit is activated when an abnormal current or short-circuit accident occurs, so that the circuit is shut off by separating the movable contact from the fixed contact.

Here, the circuit is connected in a state in which the movable contact and the fixed contact constituting the opening / closing mechanism are in contact with each other, and the movable contact is separated from the fixed contact when the abnormal current or short-circuiting occurs. A large amount of heat is generated as the contact and the arc are generated when they are spaced apart, and in the worst case, the two contactors are welded together.

Accordingly, there is a demand for a structure capable of more effectively discharging heat generated when the movable contactor and the stationary contactor are brought into contact with and separated from each other in the wiring breaker.

Korean Utility Model Registration No. 20-0466294

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for opening and closing a circuit breaker which can improve the performance of a circuit breaker by releasing heat by securing a radiating fin structure in a movable contact.

In addition, the present invention provides a structure in which a part of the lamination plate is protruded in a case where the movable contacts are constructed in a laminated manner, thereby securing a heat dissipation fin structure with a simple structure, The purpose of the device is to provide.

According to an aspect of the present invention, there is provided an opening / closing apparatus for a wiring breaker, comprising: a stationary contactor fixedly installed in a case; And a movable contactor rotatably installed on the structure in the case and contacting or spaced from the stationary contactor, wherein the movable contactor has a heat radiating fin having a structure protruded so as to dissipate heat generated when the stationary contactor is contacted or spaced apart, And a control unit.

It is preferable that the movable contact is constituted by a structure in which a plurality of plates are laminated to each other, and the radiating fins are more protruded than other plates in which some of the plurality of plates are laminated together.

At this time, the movable contact may be configured such that the partial plate and the other plate are alternately arranged.

The movable contact may be provided with a contact member at a portion contacting the fixed contact, and the radiating fin may be provided at a surface opposite to a portion where the contact member is provided in the movable contact.

The above and other objects and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: In addition to the principal task solutions as described above, various task solutions according to the present invention will be further illustrated and described.

The opening and closing apparatus for a wiring breaker according to the present invention is configured such that a heat radiating fin structure is formed in the movable contact so that heat generated when the stationary contact and the movable contact are brought into contact with and separated from each other can be released, .

Further, in the case where the movable contacts are constituted by a lamination type, since the radiating fins are formed in such a manner that the lamination plates are partly protruded in different sizes, the radiating fin structure is provided with a simple structure, There is an effect.

FIG. 1 is a cross-sectional view showing a main constituent part of a circuit breaker according to an embodiment of the present invention.
2 is a perspective view showing a main constituent part of a switching device for a wiring breaker according to an embodiment of the present invention.
3 is a perspective view illustrating a movable contact that constitutes an opening / closing apparatus for a wiring 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.

1 is a cross-sectional view showing an opening and closing apparatus for a wiring breaker according to an embodiment of the present invention.

The opening / closing device for a circuit breaker according to an embodiment of the present invention includes a handle 103 capable of manually opening and closing a circuit by pushing or pulling operation, The lever 102 that rotates inward is constructed.

The opening / closing device for the wiring breaker includes a latch 120. The latch 120 is rotatably supported by a fixed body 110 provided in a case (not shown) through a latch pin 122. [

The latch 120 is a means for restricting the trip spring to be held in a compressed or tensioned state such 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 >

A stationary contactor 10 and a movable contactor 130 are connected to a power source and a load in a case (not shown) constituting a switching device of the wiring breaker. The stationary contactor 10 is fixed to the case structure side, And the movable contactor 130 is connected to the load side power source so as to be detachable or contactable with the fixed contactor 10.

In particular, the movable contactor 130 is manually operated by the handle 103 and the lever 102, or is automatically operated by the operation of a trip device (not shown) to open and close the circuit.

The movable contactor 130 is rotated in association with the latch 120 in a state in which the movable contactor 130 is rotatably mounted on the mover holder 101 so as to be rotatable about the shaft 104. The movable contactor 130 contacts the fixed contactor 10, Respectively.

Here, the mover holder 101 is a fixing structure provided inside the case of the opening and closing apparatus.

Now, referring to Figs. 2 and 3, the heat dissipation structure of the movable contact 130 will be described in detail.

2, reference numeral 105 denotes a slit portion formed in the mover holder 101 and forming a space for allowing the movable contactor 130 to move.

The movable contact 130 has a heat radiating fin 132a having a protruding structure so as to dissipate heat generated when contacting or spaced from the stationary contactor 10. [

The movable contact 130 may be constructed in such a manner that a plurality of plates 131 and 132 are stacked and coupled to each other. Here, the lamination method of each plate may be a known lamination method of welding or bonding each other, or a lamination method that the present applicant invented and patented (Patent Application No. 10-2013-0151581).

At this time, it is preferable that the radiating fin 132a is formed by a structure in which some of the plurality of plates protrudes more than other plates 131 in which the plates 132 are stacked together.

2 and 3, the movable contactor 130 shows a structure in which the part plate 132 and the other plate 131 are alternately arranged and stacked. In other words, two partial plates 132 are disposed between three different plates 131 among the five plates stacked one on top of the other.

At this time, it is preferable that some of the plates 132 are configured to have a larger area (size) than the other plates 131 in order to secure the structure of the heat radiating fins 132a.

On the other hand, the movable contactor 130 is provided with the contact member 135 at a portion contacting the stationary contactor 10. At this time, it is preferable that the radiating fin 132a is provided on the opposite side of the portion where the contact member 135 is installed in the movable contactor 130. [

That is, the movable contact 130 having a plurality of plates stacked thereon has a bottom surface b, a front surface f, and a rear surface r, on which the contact member 135 is provided, so as not to interfere with the surrounding structure during the rotation operation And the plate 132 is further protruded from the upper surface t only to constitute the radiating fin 132a.

Of course, the structure of the radiating fin 132a is not limited to the structure formed only on the upper surface t of the movable contactor 130, but may be formed on the bottom surface b, the front surface f, (r) may be used alone or in combination.

Although the heat dissipation fin 132a described above has been described mainly on the structure of the laminated movable contact 130, the present invention is not limited to this structure. The heat dissipation fin structure may be formed by securing the heat dissipation fin structure with a structure protruding from the non- It is possible.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, Other embodiments are possible. Accordingly, the technical scope of the present invention should be determined by the appended claims.

10: Fixed contact
101: Mover holder
130:
131, 132: plate
132a:
135: contact member

Claims

A fixed contact fixedly installed in the case;
And a movable contact rotatably mounted on the structure in the case and contacting or spaced from the fixed contact,
Wherein the movable contact includes a radiating fin having a structure protruded so as to dissipate heat generated when contacting or spaced from the stationary contactor.

The method according to claim 1,
Wherein the movable contact is formed by stacking a plurality of plates,
Wherein the heat radiating fins are formed by a structure in which some of the plurality of plates protrudes more than other plates in which the plates are stacked together.

The method of claim 2,
Wherein the movable contact is configured such that the partial plate and the other plate are alternately arranged.

The method according to any one of claims 1 to 3,
Wherein the movable contact is provided with a contact member at a portion contacting the fixed contact,
Wherein the radiating fin is provided on a surface of the movable contactor opposite to a portion where the contact member is provided.