JPH0973854A - Earth leakage breaker - Google Patents

Earth leakage breaker

Info

Publication number
JPH0973854A
JPH0973854A JP25198995A JP25198995A JPH0973854A JP H0973854 A JPH0973854 A JP H0973854A JP 25198995 A JP25198995 A JP 25198995A JP 25198995 A JP25198995 A JP 25198995A JP H0973854 A JPH0973854 A JP H0973854A
Authority
JP
Japan
Prior art keywords
arc gas
arc
plate
earth leakage
back plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP25198995A
Other languages
Japanese (ja)
Inventor
Yoshiro Okano
芳郎 岡野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP25198995A priority Critical patent/JPH0973854A/en
Publication of JPH0973854A publication Critical patent/JPH0973854A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342Venting arrangements for arc chutes
    • H01H2009/343Venting arrangements for arc chutes with variable venting aperture function of arc chute internal pressure, e.g. resilient flap-valve or check-valve
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342Venting arrangements for arc chutes

Landscapes

  • Breakers (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent an earth leakage breaker which cannot pass arc gas well to the load side from being filled with the arc gas by smoothing the discharge of the arc gas from the power supply side. SOLUTION: In this earth leakage breaker in which an arc gas discharge opening 17 opposite to an arc-extinguishing chamber 1 is provided with a flexible shield plate 2 that is deformed by gas pressure and a back plate 3 supporting the plate 2 from inside, the back plate 3 is formed into a U shape supporting only the periphery of the shield plate 2 and allowing arc gas to directly pass through. The back plate facilitates the discharge of the arc gas as compared with conventional ones provided with several exhaust holes, and since a zero-phase current transformer and an electronic circuit for amplifying its outputs are arranged on the load side, even such an earth leakage breaker as not able to pass the arc gas well to the load side can be prevented from being deteriorated in insulation as the arc gas fills an outer casing.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は、漏電遮断器に関
し、特に電源側からのアークガスの排出の促進を図った
漏電遮断器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage circuit breaker, and more particularly to an earth leakage circuit breaker designed to promote discharge of arc gas from a power source side.

【0002】[0002]

【従来の技術】図5は従来の漏電遮断器における消弧室
近傍の要部分解斜視図である。図において、図示しない
固定・可動接触子を囲む消弧室1と対面して遮蔽板2
と、これを内側から支える背板3とが配置されている。
遮蔽板2は柔軟な絶縁物の薄板からなり、下部が幅広の
凸形の輪郭に形成されている。また、背板3は強固な絶
縁板から方形に形成され、上部に複数個の排気孔4があ
けられている。遮蔽板2及び背板3は図示しないケース
とカバーとからなる漏電遮断器外箱のアークガス排出口
に臨んでケースとカバーとに跨がって形成された溝に挿
入され、常時はアークガス排出口を閉塞して漏電遮断器
内への異物の侵入を防止している。
2. Description of the Related Art FIG. 5 is an exploded perspective view of essential parts near an arc extinguishing chamber in a conventional earth leakage breaker. In the figure, a shield plate 2 is provided so as to face an arc extinguishing chamber 1 surrounding a fixed / movable contact (not shown).
And a back plate 3 that supports this from the inside.
The shielding plate 2 is made of a flexible insulating thin plate, and the lower part thereof is formed in a wide convex shape. Further, the back plate 3 is formed in a rectangular shape from a strong insulating plate, and a plurality of exhaust holes 4 are formed in the upper part. The shield plate 2 and the back plate 3 are inserted into a groove formed across the case and the cover to face the arc gas discharge port of the outer casing of the earth leakage circuit breaker, which is not shown in the figure, and are normally inserted in the arc gas discharge port. Is closed to prevent foreign matter from entering the earth leakage breaker.

【0003】その場合、背板3は左右両縁が全高に渡っ
て溝に挿入されるが、遮蔽板2は下部の幅広部のみがケ
ース側の溝内に挿入されて保持され、上部側は自由端と
される。そして、電流遮断時にアークガスが発生する
と、アークガス排出口から排出されるアークガスは背板
3の排気孔4を通して遮蔽板2に作用し、このガス圧を
受けた遮蔽板2はケース側の固定端を支点に上部側が図
に鎖線で示すように湾曲してアークガスを通過させる。
In this case, the left and right edges of the back plate 3 are inserted into the groove over the entire height, but the shield plate 2 is held by inserting only the lower wide portion into the groove on the case side and the upper side. It is a free end. Then, when the arc gas is generated when the current is cut off, the arc gas discharged from the arc gas discharge port acts on the shield plate 2 through the exhaust hole 4 of the back plate 3, and the shield plate 2 receiving this gas pressure causes the fixed end on the case side to move. The upper side of the fulcrum is curved as shown by the chain line in the figure to allow the arc gas to pass through.

【0004】[0004]

【発明が解決しようとする課題】ところで、漏電遮断器
は配線用遮断器の機能に漏電保護機能が付加されたもの
であるが、漏電検出用の零相変流器やその出力を増幅す
る電子回路などは一般に外箱内の負荷側端部に配置され
ている。そのため、電流遮断時に発生するアークガスは
零相変流器や電子回路に妨げられ、負荷側への抜けが配
線用遮断器に比べて悪い。そこで、漏電遮断器において
はアークガスは通常電源側からのみ排出するようにして
いるが、図5に示したような従来構成ではアークガスの
排出量が排気孔4の開口面積で制限されるため、大電流
遮断時には外箱内にアークガスが充満し、ケースやカバ
ーの内面にすすや溶融金属粉が付着して絶縁抵抗の低下
を招くという問題があった。特に近時は漏電遮断器と配
線用遮断器の取付互換性を得るために漏電遮断器の外箱
のコンパクト化が進められる傾向にあり、漏電遮断器の
電源側からのアークガス排出性能の向上の要求が強まっ
ている。そこで、この発明の課題は、遮蔽板による異物
侵入防止機能を損なうことなく、電源側からのアークガ
ス排出性能を向上させることにある。
By the way, the earth leakage circuit breaker is a wiring circuit breaker having an earth leakage protection function added thereto. However, a zero-phase current transformer for earth leakage detection and an electronic device for amplifying its output are used. Circuits and the like are generally arranged at the load-side end of the outer box. Therefore, the arc gas generated when the current is interrupted is blocked by the zero-phase current transformer and the electronic circuit, and the escape to the load side is worse than that of the wiring breaker. Therefore, in the earth leakage circuit breaker, the arc gas is normally discharged only from the power source side. However, in the conventional configuration as shown in FIG. 5, the discharge amount of the arc gas is limited by the opening area of the exhaust hole 4, so that it is large. When the current is cut off, there is a problem that the outer box is filled with arc gas and soot or molten metal powder adheres to the inner surface of the case or the cover to cause a decrease in insulation resistance. Especially in recent years, there is a tendency for the outer box of the earth leakage breaker to be made compact in order to obtain compatibility of installation of the earth leakage breaker and the breaker for wiring, and the arc gas discharge performance from the power supply side of the earth leakage breaker is improved. Demand is growing. Then, the subject of this invention is improving the arc gas discharge | emission performance from a power supply side, without impairing the foreign substance intrusion prevention function by a shielding plate.

【0005】[0005]

【課題を解決するための手段】上記課題を解決するため
に、この発明は、ケースとカバーとからなる漏電遮断器
外箱の電源側端部に消弧室と対面してアークガス排出口
が設けられるとともに、このアークガス排出口は前記ケ
ースと前記カバーとに跨がる溝に挿入された柔軟な遮蔽
板と、この遮蔽板を内側から支える排気孔を備えた強固
な背板とで常時は閉塞され、電流遮断時には前記遮蔽板
は前記背板の前記排気孔を通して前記アークガス排出口
から排出されるアークガスのガス圧を受け、前記ケース
側の固定端を支点に上部側が湾曲して前記アークガスを
通過させる漏電遮断器において、前記背板を前記遮蔽板
の周縁部のみを支えるU字形に形成するものとする。
In order to solve the above problems, the present invention provides an arc gas discharge port facing the arc extinguishing chamber at the power source side end of an earth leakage breaker outer box consisting of a case and a cover. At the same time, the arc gas discharge port is normally closed by a flexible shield plate inserted in a groove that straddles the case and the cover, and a strong back plate having an exhaust hole that supports the shield plate from the inside. When the current is cut off, the shield plate receives the gas pressure of the arc gas discharged from the arc gas discharge port through the exhaust hole of the back plate, and the upper side is curved with the fixed end of the case side as a fulcrum to pass the arc gas. In the earth leakage circuit breaker, the back plate has a U-shape that supports only the peripheral edge of the shield plate.

【0006】このように背板をU字形とすることによ
り、背板はアークガスに対してほとんど素通しとなり、
アークガスの排出が背板で妨げられることがなくなる。
一方、遮蔽板はその周縁部が背板で支えられるので、外
側から何らかの力が働いてもアークガス排出口に押し込
まれる危険が少なく、異物の侵入に対して良好に遮蔽機
能を維持する。また、消弧室の上部に覆い板を装着する
ことにより、消弧室の上部からの負荷側へ向かうアーク
ガスの拡散が抑えられ、電源側へのアークガスの放出が
一層促進される。
By making the back plate U-shaped in this way, the back plate is almost transparent to the arc gas,
Exhaust of arc gas is not obstructed by the back plate.
On the other hand, since the periphery of the shield plate is supported by the back plate, there is little risk of being pushed into the arc gas discharge port even if some force acts from the outside, and the shield function is well maintained against the intrusion of foreign matter. Further, by mounting the cover plate on the upper part of the arc extinguishing chamber, the diffusion of the arc gas toward the load side from the upper part of the arc extinguishing chamber is suppressed, and the discharge of the arc gas to the power supply side is further promoted.

【0007】[0007]

【発明の実施の形態】図1〜図4はこの発明の実施の形
態を示すもので、図1はアークガス排出口部分の斜視
図、図2はその分解斜視図、図3は消弧室に覆い板を装
着する方法を示す斜視図、図4は3極漏電遮断器の縦断
面図である。まず、図4において、漏電遮断器はケース
5とカバー6とからなるモールド樹脂の外箱内に各機構
が収容されて構成され、図示オン状態において電流は、
電源側端子7からこれと一体の固定接触子8、これと接
点を介して接触する可動接触子9、これと摺動接触する
固定導体10、これにねじで締め付けられた過電流引外
し装置11のヒータ導体11a、これに接合された中継
導体12を経て、これと一体の負荷側端子13に流れ
る。
1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view of an arc gas discharge port, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is an arc extinguishing chamber. FIG. 4 is a perspective view showing a method of mounting the cover plate, and FIG. 4 is a vertical sectional view of the three-pole earth leakage breaker. First, in FIG. 4, the earth leakage breaker is configured such that each mechanism is housed in an outer box of molded resin composed of a case 5 and a cover 6.
A fixed contactor 8 integrated with the power source side terminal 7, a movable contactor 9 that comes into contact with the fixed contactor 8 through a contact, a fixed conductor 10 that makes sliding contact with the movable contactor 9, and an overcurrent trip device 11 screwed to the fixed conductor 10. Through the heater conductor 11a and the relay conductor 12 joined to the heater conductor 11a, and flows to the load-side terminal 13 integrated with the heater conductor 11a.

【0008】過電流引外し装置11と負荷側端子13と
の間には、中継導体12を一次導体とする零相変流器1
4及びその二次出力を増幅する電子回路15が配置され
ている。通電電流が過電流状態になると過電流引外し装
置11が作動し、トリップクロスバー16を叩いて可動
接触子9を開離させる。また、漏電が発生すると零相変
流器に二次出力が生じ、これを増幅した電子回路15か
らの出力で図示しないトリップコイルユニットが駆動さ
れ、やはりトリップクロスバー16が叩かれて可動接触
子9が開離する。可動接触子9が開離すると、固定接触
子8との間にアークが生じ、同時に高温のアークガスが
発生する。
Between the overcurrent trip device 11 and the load-side terminal 13, a zero-phase current transformer 1 having a relay conductor 12 as a primary conductor is provided.
4 and an electronic circuit 15 for amplifying its secondary output are arranged. When the energized current becomes an overcurrent state, the overcurrent trip device 11 operates and strikes the trip crossbar 16 to open the movable contact 9. When a leakage occurs, a secondary output is generated in the zero-phase current transformer, and the trip coil unit (not shown) is driven by the output from the electronic circuit 15 that amplifies the secondary output, and the trip crossbar 16 is also hit to move the movable contactor. 9 opens. When the movable contact 9 is separated, an arc is generated between the movable contact 9 and the fixed contact 8, and at the same time, high-temperature arc gas is generated.

【0009】そこで、固定・可動接触子8,9を囲んで
消弧室1が配置され、また外箱の消弧室1と対面する部
分には電源側端子7側に開口するアークガス排出口17
がケース5とカバー6とに跨がって設けられている。そ
して、アークガス排出口17には遮蔽板2と、これを内
側から支える背板3とが配置されている。外箱の負荷側
端部にも同様にアークガス排出口18が設けられている
が、漏電遮断器の負荷側には零相変流器14や電子回路
15があってアークガスの通流が妨げられているため、
図示漏電遮断器では負荷側のアークガス排出口18は厚
肉の遮蔽板19が装着されて閉塞されている。
Therefore, the arc-extinguishing chamber 1 is arranged so as to surround the fixed / movable contacts 8 and 9, and the arc gas discharge port 17 opening to the power supply side terminal 7 side is provided in a portion of the outer box facing the arc-extinguishing chamber 1.
Is provided across the case 5 and the cover 6. A shield plate 2 and a back plate 3 that supports the shield plate 2 from the inside are arranged at the arc gas discharge port 17. Similarly, an arc gas discharge port 18 is also provided at the load side end of the outer box, but there is a zero-phase current transformer 14 and an electronic circuit 15 on the load side of the earth leakage breaker to prevent the flow of arc gas. Because
In the illustrated earth leakage breaker, the arc gas discharge port 18 on the load side is closed by mounting a thick shielding plate 19.

【0010】図1において、アークガス排出口17の遮
蔽板2と背板3とは、ケース5とカバー6(図1では省
略してある)とに跨がる左右一対の溝20に挿入されて
保持されている。図2に示すように、遮蔽板2は柔軟性
のあるファイバの薄板により、図5の従来例と同様に凸
形の輪郭に形成されている。一方、遮蔽板2を内側から
支える背板3はガラス繊維入りの強固なファイバの厚板
が用いられ、図示の通り遮蔽板2の周縁部のみを支える
U字形に形成されている。遮蔽板2の下部幅広部の幅寸
法Aと背板3の幅寸法Bとは等しく(A=B)、遮蔽板
2の上部幅寸法Cは背板3の開口幅寸法Dよりも大きく
(C>D)なっている。これら遮蔽板2と背板3とは重
ねられて、対向する溝底間の距離が上記幅寸法A,Bよ
り僅かに大きい溝20に挿入され、遮蔽板2は下部幅広
部のみが溝20内に保持される。
In FIG. 1, the shield plate 2 and the back plate 3 of the arc gas discharge port 17 are inserted into a pair of left and right grooves 20 extending over a case 5 and a cover 6 (not shown in FIG. 1). Is held. As shown in FIG. 2, the shielding plate 2 is formed of a flexible thin fiber plate and has a convex contour as in the conventional example of FIG. On the other hand, the back plate 3 that supports the shielding plate 2 from the inside is made of a thick fiber plate containing glass fibers, and is formed in a U-shape that supports only the peripheral portion of the shielding plate 2 as illustrated. The width A of the lower wide portion of the shielding plate 2 and the width B of the back plate 3 are equal (A = B), and the upper width C of the shielding plate 2 is larger than the opening width D of the back plate 3 (C > D). The shield plate 2 and the back plate 3 are overlapped with each other and inserted into the groove 20 in which the distance between the opposing groove bottoms is slightly larger than the width dimensions A and B, and the shield plate 2 has only the lower wide portion in the groove 20. Held in.

【0011】一方、消弧室1はファイバ板からなる左右
一対の側壁21に磁性板からなる複数枚の消弧グリッド
22が適宜の間隔で積層、支持されて構成され、消弧グ
リッド22は両端がかしめ加工により側壁21に結合さ
れている。消弧室1の左右の側壁21は、背板3の開口
のやや内側に位置する。消弧室1の上部には覆い板23
が装着される。覆い板23はファイバ板からなり、一端
に左右に張り出す取付腕23aが設けられている。この
覆い板23は側壁21の穴21aに取付腕23aが挿入
されて消弧室1に保持される。覆い板23は図3に示す
ように弾性的に湾曲させ、取付腕23aを穴21aに挿
入する。
On the other hand, the arc-extinguishing chamber 1 is constructed by laminating and supporting a plurality of arc-extinguishing grids 22 made of magnetic plates on a pair of left and right side walls 21 made of fiber plates at appropriate intervals. It is joined to the side wall 21 by caulking. The left and right side walls 21 of the arc extinguishing chamber 1 are located slightly inside the opening of the back plate 3. A cover plate 23 is provided above the arc-extinguishing chamber 1.
Is attached. The cover plate 23 is made of a fiber plate, and is provided at one end with a mounting arm 23a that projects left and right. The cover plate 23 is held in the arc-extinguishing chamber 1 by inserting the mounting arm 23a into the hole 21a of the side wall 21. The cover plate 23 is elastically curved as shown in FIG. 3, and the mounting arm 23a is inserted into the hole 21a.

【0012】上述実施の形態の示した漏電遮断器におい
て、可動接触子9の開離に伴いアークガスが発生する
と、図1に示すように遮蔽板2がガス圧で外側に容易に
変形し、アークガス排出口17から背板3の開口を介し
て矢印で示すようにアークガスを排出させる。その際、
背板3はアークガスに対してほとんど素通しの状態にあ
るので、限られた排気孔面積の従来の背板のようにアー
クガスの排出を妨げることがない。従って、アークガス
は外箱内で負荷側に向かうことなく直ちに外部に排出さ
れ、高圧のガスが外箱内に充満してすすや溶融金属粉が
ケースやカバーの内面に付着することがない。その一
方、U字形の背板3は遮蔽板2の周縁部を内側から支え
るので、何らかの外力が遮蔽板2に外側から作用した場
合にも、薄板の遮蔽板2が変形してアークガス排出口1
7内に入り込むことが防止される。
In the earth leakage circuit breaker shown in the above-mentioned embodiment, when arc gas is generated as the movable contact 9 is opened, the shielding plate 2 is easily deformed to the outside by the gas pressure as shown in FIG. Arc gas is discharged from the discharge port 17 through the opening of the back plate 3 as indicated by an arrow. that time,
Since the back plate 3 is almost transparent to the arc gas, it does not hinder the discharge of the arc gas unlike the conventional back plate having a limited exhaust hole area. Therefore, the arc gas is immediately discharged to the outside without going to the load side in the outer box, so that high-pressure gas does not fill the outer box and soot or molten metal powder does not adhere to the inner surface of the case or the cover. On the other hand, since the U-shaped back plate 3 supports the peripheral portion of the shield plate 2 from the inside, even if some external force acts on the shield plate 2 from the outside, the thin shield plate 2 deforms and the arc gas discharge port 1
7 is prevented from entering.

【0013】また、消弧室1の上部は覆い板23で覆わ
れているので、アークガス発生の瞬時に消弧室1の上部
からの負荷側へ向かうアークガスの拡散も抑えられ、電
源側へのアークガスの放出が一層促進される。なお、覆
い板23は図4に示すようにカバー6の突部6aに接
し、取付腕23aと反対側の端部の浮き上がりが押さえ
られる。
Further, since the upper part of the arc extinguishing chamber 1 is covered with the cover plate 23, the diffusion of the arc gas from the upper part of the arc extinguishing chamber 1 toward the load side is suppressed at the moment when the arc gas is generated, and the arc gas to the power source side is suppressed. The discharge of arc gas is further promoted. The cover plate 23 is in contact with the protrusion 6a of the cover 6 as shown in FIG. 4, and the lifting of the end portion on the opposite side of the mounting arm 23a is suppressed.

【0014】[0014]

【発明の効果】この発明によれば、電源側へのアークガ
スの排出が容易になるので、負荷側へのアークガスの抜
けが悪い漏電遮断器においても高圧ガスが外箱内に充満
して絶縁性が低下することが有効に防止される。その場
合、消弧室上部に覆い板を装着することにより、負荷側
へのアークガスの拡散が一層抑えられる。
According to the present invention, since the arc gas is easily discharged to the power source side, even in the earth leakage breaker in which the arc gas is not easily discharged to the load side, the high pressure gas is filled in the outer box and the insulation property is improved. Is effectively prevented. In that case, by mounting a cover plate on the upper part of the arc extinguishing chamber, the diffusion of the arc gas to the load side can be further suppressed.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の実施の形態を示す要部斜視図であ
る。
FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention.

【図2】図1の分解斜視図である。FIG. 2 is an exploded perspective view of FIG.

【図3】消弧室に覆い板を装着する方法を示す斜視図で
ある。
FIG. 3 is a perspective view showing a method of attaching a cover plate to the arc extinguishing chamber.

【図4】図1の遮蔽板及び背板を備えた漏電遮断器の縦
断面図である。
FIG. 4 is a vertical cross-sectional view of an earth leakage breaker including the shield plate and the back plate of FIG.

【図5】従来例を示す要部分解斜視図である。FIG. 5 is an exploded perspective view of essential parts showing a conventional example.

【符号の説明】[Explanation of symbols]

1 消弧室 2 遮蔽板 3 背板 5 ケース 6 カバー 14 零相変流器 15 電子回路 17 アークガス排出口 20 溝 23 覆い板 1 arc-extinguishing chamber 2 shield plate 3 back plate 5 case 6 cover 14 zero-phase current transformer 15 electronic circuit 17 arc gas discharge port 20 groove 23 cover plate

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】ケースとカバーとからなる漏電遮断器外箱
の電源側端部に消弧室と対面してアークガス排出口が設
けられるとともに、このアークガス排出口は前記ケース
と前記カバーとに跨がる溝に挿入された柔軟な遮蔽板
と、この遮蔽板を内側から支える排気孔を備えた強固な
背板とで常時は閉塞され、電流遮断時には前記遮蔽板は
前記背板の前記排気孔を通して前記アークガス排出口か
ら排出されるアークガスのガス圧を受け、前記ケース側
の固定端を支点に上部側が湾曲して前記アークガスを通
過させる漏電遮断器において、 前記背板を前記遮蔽板の周縁部のみを支えるU字形に形
成したことを特徴とする漏電遮断器。
1. An arc gas discharge port is provided at an end portion on the power source side of an earth leakage circuit breaker outer box including a case and a cover, the arc gas discharge port facing the arc extinguishing chamber, and the arc gas discharge port straddling the case and the cover. A flexible shield plate inserted in the groove and a strong back plate having an exhaust hole that supports the shield plate from the inside are normally closed, and when the current is cut off, the shield plate is the exhaust hole of the back plate. In the earth leakage circuit breaker, which receives the gas pressure of the arc gas discharged from the arc gas discharge port through the arc gas and allows the arc gas to pass through with the fixed end of the case side as a fulcrum, the upper plate is curved, and the back plate is a peripheral portion of the shielding plate. An earth leakage circuit breaker characterized by being formed in a U shape that supports only the chisel.
【請求項2】絶縁板からなる覆い板を消弧室の上部に装
着したことを特徴とする請求項1記載の漏電遮断器。
2. The earth leakage breaker according to claim 1, wherein a cover plate made of an insulating plate is attached to an upper portion of the arc extinguishing chamber.
JP25198995A 1995-09-05 1995-09-05 Earth leakage breaker Pending JPH0973854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25198995A JPH0973854A (en) 1995-09-05 1995-09-05 Earth leakage breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25198995A JPH0973854A (en) 1995-09-05 1995-09-05 Earth leakage breaker

Publications (1)

Publication Number Publication Date
JPH0973854A true JPH0973854A (en) 1997-03-18

Family

ID=17231002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25198995A Pending JPH0973854A (en) 1995-09-05 1995-09-05 Earth leakage breaker

Country Status (1)

Country Link
JP (1) JPH0973854A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352691A (en) * 2001-05-28 2002-12-06 Fuji Electric Co Ltd Dust-proof structure for circuit breaker
KR20130051279A (en) * 2011-11-09 2013-05-20 삼성에스디아이 주식회사 Secondary bttery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352691A (en) * 2001-05-28 2002-12-06 Fuji Electric Co Ltd Dust-proof structure for circuit breaker
JP4524534B2 (en) * 2001-05-28 2010-08-18 富士電機機器制御株式会社 Circuit breaker dustproof structure
KR20130051279A (en) * 2011-11-09 2013-05-20 삼성에스디아이 주식회사 Secondary bttery

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