KR950003014Y1 - Apparatus for shielding arc of circuit breaker - Google Patents

Apparatus for shielding arc of circuit breaker Download PDF

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Publication number
KR950003014Y1
KR950003014Y1 KR92018116U KR920018116U KR950003014Y1 KR 950003014 Y1 KR950003014 Y1 KR 950003014Y1 KR 92018116 U KR92018116 U KR 92018116U KR 920018116 U KR920018116 U KR 920018116U KR 950003014 Y1 KR950003014 Y1 KR 950003014Y1
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South Korea
Prior art keywords
fixed contact
circuit breaker
arc
movable contact
shielding plate
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KR92018116U
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Korean (ko)
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KR940008598U (en
Inventor
임종득
Original Assignee
성기설
금성계전 주식회사
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Priority to KR92018116U priority Critical patent/KR950003014Y1/en
Publication of KR940008598U publication Critical patent/KR940008598U/en
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Publication of KR950003014Y1 publication Critical patent/KR950003014Y1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/04Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08Stationary parts for restricting or subdividing the arc, e.g. barrier plate

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  • Breakers (AREA)

Abstract

내용 없음.No content.

Description

회로차단기의 아아크 차폐장치Arc shield of circuit breaker

제1도는 종래 회로차단기의 개략 단면도.1 is a schematic cross-sectional view of a conventional circuit breaker.

제2도는 종래 장치를 나타낸 사시도.2 is a perspective view showing a conventional device.

제3도는 본 고안 장치가 적용된 회로차단기의 개략 단면도.3 is a schematic cross-sectional view of a circuit breaker to which the device of the present invention is applied.

제4도는 본 고안 장치를 나타낸 사시도.Figure 4 is a perspective view showing the device of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 케이스 2 : 홈부1 case 2 groove

3 : 차폐판 4 : 걸림턱3: shielding plate 4: locking jaw

5 : 고정접점수납공간 6 : 가동접점작동공간5: fixed contact storage space 6: movable contact operating space

7 : 격벽부7: partition wall

본 고안은 회로차단기에 관한것으로, 보다 구체적으로는 사고전류나 이상전류로 인해 가동접점과 고정접점이 격리될때 발생하는 아아크(Arc)를 차폐하여 고정접점을 안전하게 보호하고 아아크가 개폐기구부로 확산되는 것을 방지할 수 있게 한 것이다.The present invention relates to a circuit breaker. More specifically, the arc is generated when the movable contact and the fixed contact are isolated due to an accident current or an abnormal current to protect the fixed contact, and the arc spreads to the switching mechanism. To prevent it.

회로차단기는 전기적 선로상에 설치되어 이상전류나 사고전류로 부터 주변기기를 보호하는 역할을 하는 전기 기구로서, 그 구성은 전원의 투입을 위한 핸들레버와, 기준 전류 이상의 전류가 흐를때 작동하는 트립바(Trip Bar)와, 상기 트립바 및 핸들레버와 연동하면서 가동접점을 구동시키는 개폐기구와, 상기 개폐기구에 종속되어 작동하는 가동접점대와, 케이스에 고정된 상태로 상기 가동접점대의 인접한 위치에 설치된 공정접점대등의 주요부분으로 이루어져 있다.Circuit breaker is an electric appliance installed on the electric line to protect peripheral devices from abnormal current or accident current. Its configuration consists of a handle lever for power supply and a trip bar that operates when current above the reference current flows. (Trip Bar), the opening and closing mechanism for driving the movable contact while interlocking with the trip bar and the handle lever, the movable contact table operating in dependence on the opening and closing mechanism, and in a position adjacent to the movable contact table in a fixed state. It consists of main parts such as installed process contacts.

또 상기한 회로차단기는 전원투입을 위해 핸들레버를 “온” 방향으로 이동시키면 개폐기구와 가동접점대가 핸들레버와 연동하면서 가동접점대의 가동접점이 고정접점대의 고정접점과 접속함과 동시에 개폐기구가 트립바에 의해 구속되고, 이상전류나 사고전류가 흐르면 트립바가 개폐기구의 구속을 해제시킴과 동시에 가동접점과 고정접점 사이에서 자기 반발력이 작용하여 가동접점과 고정접점은 격리된다.In addition, if the circuit breaker moves the handle lever to the “on” direction to turn on the power, the switch mechanism and the movable contact point are interlocked with the handle lever, and the movable contact point of the movable contact point is connected to the fixed contact point of the fixed contact point. If an abnormal current or an accident current flows, the trip bar releases the restraint mechanism and the magnetic repulsive force acts between the movable contact and the fixed contact to isolate the movable contact and the fixed contact.

이렇게 가동접점과 고정접점이 격리될때 두접점 사이의 공기는 높은 전압에 의해 절연파괴가 일어나 아아크가 발생하게 되고 높은 아아크열로 인해 고정접점이 용융되는 현상이 나타나게 되며, 높은 아아크 압력에 의해 아아크가 개폐기구 방향으로 확산되어 개폐기구부의 이상을 초래하게 된다.When the movable contact and the fixed contact are isolated, the air between the two contacts causes insulation breakdown due to high voltage, causing arcing and melting of the fixed contact due to the high arc heat. Diffusion in the direction of the switch mechanism causes an abnormality of the switch mechanism portion.

따라서 회로차단기에는 상기와 같은 고정접점의 용융현상과 아아크의 확산을 방지하기 위한 아아크 차폐장치가 설치되어야 한다.Therefore, the circuit breaker should be provided with an arc shielding device for preventing the melting of the fixed contact and the diffusion of the arc.

종래에는 제1도와 제2도에 도시한 바와같이 케이스(1)에 복수개의 차폐판이 삽입될 수 있는 홈부(2)를 형성하고 이들 홈부(2)에 각각 차폐판(11)을 삽입하여 아아크의 확산을 방지하였다.Conventionally, as shown in FIG. 1 and FIG. 2, a groove portion 2 into which a plurality of shield plates can be inserted is formed in the case 1, and the shield plates 11 are inserted into the groove portions 2, respectively. Diffusion was prevented.

또한, 차폐판(11)에는 고정접점대(8)의 수직절곡부분이 수납될 수 있는 크기의 고정접점대수납공간(13)과 가동접점대(9)가 이동될 수 있도록 하기 위한 가동접점대작동공간(14) 및 차폐판의 고정을 위한 걸림턱(12)이 형성되어 있다.In addition, the shielding plate 11 has a movable contact table for moving the fixed contact table storage space 13 and the movable contact table 9 of a size where the vertical bent portion of the fixed contact table 8 can be stored. A locking step 12 for fixing the working space 14 and the shielding plate is formed.

따라서 차폐판(11)을 케이스(1)에 결합하면 걸림턱(12)부분이 홈부(2)에 끼워지면서 차폐판이 케이스에 고정되며, 상기한 차폐판에 의해 가동접점(9a)과 고정접점(8a)이 아아크에 격리될때 발생하는 아아크가 개폐기구부 측으로 확산되는 것을 방지하게 된다.Accordingly, when the shielding plate 11 is coupled to the case 1, the locking jaw 12 is fitted into the groove 2, and the shielding plate is fixed to the case, and the movable contact 9a and the fixed contact ( The arc generated when 8a) is isolated from the arc is prevented from spreading to the opening / closing mechanism part side.

그러나 상기와 같은 종래의 장치는 아아크가 고정접점대(8) 방향으로 확산되는 것을 방지할 수 없기 때문에 높은 아아크 압력과 열에 의해 고정접점대가 용융되거나 변형될 우려가 많고, 또한 차폐판(11)에 고정접점대수납공간(13)과 가동접점대작동공간(14)이 서로 연통되게 형성됨에 따라 아아크가 개폐기구부 측으로 환산되는 것을 효과적으로 방지하기가 어려운 문제가 있다.However, the conventional apparatus as described above cannot prevent the arc from spreading in the direction of the fixed contact point 8, so that the fixed contact point may be melted or deformed due to high arc pressure and heat. As the fixed contact table storage space 13 and the movable contact table operating space 14 are formed in communication with each other, there is a problem that it is difficult to effectively prevent the arc from being converted to the opening / closing mechanism part side.

본 고안은 차폐판의 구조를 개선하여 아아크의 확산을 보다 완벽하게 차단할 수 있게 한것으로, 이를 첨부도면 제3도와 제4도를 참조하여 상세하게 설명한다.The present invention is to improve the structure of the shield plate to more completely block the diffusion of the arc, it will be described in detail with reference to the attached drawings 3 and 4.

제3도는 본 고안 장치가 적용된 회로차단기의 개략 단면도이고, 제4도는 본 고안 장치의 사시도이다.3 is a schematic cross-sectional view of a circuit breaker to which the device of the present invention is applied, and FIG. 4 is a perspective view of the device of the present invention.

차폐판(3)의 양측에는 차폐판을 케이스(1)의 홈부(2)로 삽입고정하기 위한 걸림턱(4)이 형성되어 있고 하부에는 고정접점대(8)가 수납되는 고정접점대수납공간(5)과 가동접점대(9)의 이동공간이 되는 가동접점대작동공간(6)이 형성되어 있으며, 고정접점대수납공간(4)의 직상방에는 절곡돌출된 격벽부(7)가 형성되어 있다.On both sides of the shield plate 3, a locking step 4 for inserting and fixing the shield plate into the groove 2 of the case 1 is formed, and a fixed contact table storage space in which the fixed contact table 8 is accommodated in the lower portion. (5) and the movable contact table operating space 6, which is a moving space of the movable contact table 9, are formed, and the partition wall portion 7 which is bent and protruded is formed directly above the fixed contact table storage space 4. It is.

또한 상기 격벽부(7)는 고정접점대(8)의 상면과 접속하게 되며, 고정접점대수납공간(5)과 가동접점대작동공간(6)은 서로 통하여 있지 않고 각각 별도로 구획되어 있다.In addition, the partition wall portion 7 is connected to the upper surface of the fixed contact table 8, the fixed contact table storage space 5 and the movable contact table operating space 6 are not separated from each other but are partitioned separately.

상기와 같이된 본 고안은 이상전류나 사고전류에 의해 가동접점대(9)의 가동접점(9a)과 고정접점대(8)의 고정접점(8a)이 격리되면서 아아크가 발생할때 고정접점대(8)의 상면에 접속된 격리부(7)는 아아크가 고정접점대(8) 방향으로 확산되는 것을 방지하여 주게되고, 이에따라 아아크의 고온에 의해 고정접점대 용융되거나 변형되는 일이없게 된다.The present invention as described above, when the arc is generated while the movable contact 9a of the movable contact 9 and the fixed contact 8a of the fixed contact 8 are separated by an abnormal current or an accident current ( The isolation portion 7 connected to the upper surface of 8) prevents the arc from diffusing in the direction of the fixed contact point 8, and therefore, the fixed contact point is not melted or deformed by the high temperature of the arc.

또한 고정접점수납공간과 가동접점작동공간이 서로 통하여져 있는 종래 차례판과는 달리 이들 공간이 별도로 구획되어 있으므로 아아크가 차폐판의 공간부를 통해 개폐기구부 측으로 확산되는 것을 최소화 할 수 있고 개폐기구부를 보다 안전하게 보호할 수 있게 된다.In addition, unlike the conventional turn plates in which the fixed contact storage space and the movable contact operating space pass through each other, these spaces are partitioned separately, thereby minimizing the spread of arc to the opening / closing mechanism part through the space part of the shielding plate. It will be safe to protect.

Claims (1)

회로차단기의 케이스(1)에 홈부(2)를 형성하고 차폐판(3)의 걸림턱(4)을 상기 홈부에 끼워 고정하는 것에 있어서, 차폐판(3)에 격벽부(7)를 형성하여 상기 격벽부가 고정접점대의 상면과 접속되게 하고 고정접점수납공간(5)과 가동접점작동공간(6)을 별도로 구획되게 형성하여서 됨을 특징으로 하는 회로차단기의 아아크 차폐장치.In forming the groove part 2 in the case 1 of a circuit breaker, and fixing the latching jaw 4 of the shielding plate 3 to the said groove part, the partition part 7 is formed in the shielding plate 3, Ark shielding device of the circuit breaker, characterized in that the partition wall portion is connected to the upper surface of the fixed contact table and the fixed contact storage space (5) and the movable contact operating space (6) to be partitioned separately.
KR92018116U 1992-09-23 1992-09-23 Apparatus for shielding arc of circuit breaker KR950003014Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR92018116U KR950003014Y1 (en) 1992-09-23 1992-09-23 Apparatus for shielding arc of circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR92018116U KR950003014Y1 (en) 1992-09-23 1992-09-23 Apparatus for shielding arc of circuit breaker

Publications (2)

Publication Number Publication Date
KR940008598U KR940008598U (en) 1994-04-21
KR950003014Y1 true KR950003014Y1 (en) 1995-04-19

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