JPS61131048U

JPS61131048U -

Info

Publication number: JPS61131048U
Application number: JP1386585U
Authority: JP
Priority date: 1985-02-01
Filing date: 1985-02-01
Publication date: 1986-08-16

Description

[Brief explanation of drawings]

第１図ないし第４図、第６図及び第７図はこの
考案による交流回路しや断器の一実施例の要部を
示し、第１図は可動接触子部の分解斜視図、第２
図は固定接触子部の分解斜視図、第３図は両側極
の消弧板と固定接点の関係を示す展開図、第４図
は中央極の消弧板と固定接点の関係を示す展開図
、第５図は三相交流電源回路の定常電流を示す波
形図、第６図は第５図の交流電流を各時点でしや
断したときのアークの状態を示す正面から見た説
明図、第７図は両側極の可動接点が開離した状態
を示す動作説明図、第８図及び第９図はこの考案
の他の実施例を示す可動接触子部の分解斜視図及
び固定接触子部の分触斜視図、第１０図ａは従来
の一般的な回路しや断器を示す箱体は断面にした
平面図、第１０図ｂは第１０図ａのｂ―ｂ線にお
ける断面図である。図において、１２…箱体、２１…固定接触子、
２０１…固定導体、２０２…固定接点、３１…可
動接触子、３０１…可動導体、３０２…可動接点
、６…固定側圧力反射体、６０１…通し穴、７…
可動側圧力反射板、７０１…通し穴、５１，５２
…消弧板、５１１…第１の切欠溝、５１２…第２
の切欠溝、５１３…切欠溝、６１…固定側圧力反
射体、６１１…通し穴、６１２…スリツト、７１
…可動側圧力反射体、７１１…通し穴、７１２…
スリツト。なお、図中同一符号は同一又は相当部
分を示す。 1 to 4, 6 and 7 show the main parts of an embodiment of the AC circuit breaker according to this invention, FIG. 1 is an exploded perspective view of the movable contact part, and FIG.
The figure is an exploded perspective view of the fixed contact part, Figure 3 is a developed view showing the relationship between the arc-extinguishing plates of both poles and the fixed contact, and Figure 4 is a developed view showing the relationship between the arc-extinguishing plate of the center pole and the fixed contact. , Fig. 5 is a waveform diagram showing the steady current of the three-phase AC power supply circuit, Fig. 6 is an explanatory diagram seen from the front showing the state of the arc when the alternating current in Fig. 5 is cut off at each point, FIG. 7 is an operation explanatory diagram showing a state in which the movable contacts of both poles are opened, and FIGS. 8 and 9 are exploded perspective views of the movable contact portion and the fixed contact portion showing other embodiments of this invention. Figure 10a is a cross-sectional plan view of the box showing a conventional general circuit and disconnector, and Figure 10b is a cross-sectional view taken along line bb in Figure 10a. be. In the figure, 12...box body, 21...fixed contactor,
201... Fixed conductor, 202... Fixed contact, 31... Movable contact, 301... Movable conductor, 302... Movable contact, 6... Fixed side pressure reflector, 601... Through hole, 7...
Movable side pressure reflection plate, 701...Through hole, 51, 52
...Arc-extinguishing plate, 511...First notch groove, 512...Second
Notch groove, 513... Notch groove, 61... Fixed side pressure reflector, 611... Through hole, 612... Slit, 71
...Movable side pressure reflector, 711...Through hole, 712...
Slits. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims

[Scope of Claim for Utility Model Registration] (1) A fixed contact in which a fixed contact is fixed to one end of a fixed conductor, and a movable contact in which a movable contact corresponding to the fixed contact is fixed to one end of a movable conductor, It is provided with three poles for three phases and is housed in a box made of insulating material, and a plurality of arc extinguishing plates are arranged in multiple stages to extinguish the arc that occurs when the movable contact opens from the fixed contact. The fixed side pressure reflector is made of a high-resistance material and is fixed to the fixed conductor, the fixed contact protrudes from the through hole and surrounds the side, and the movable conductor is made of a high-resistance material. A movable side pressure reflector is fixed to the movable side and protrudes from the through hole to surround the side circumference, and each of the arc extinguishing plates on both sides of the three poles is cut from the front end on the side of each of the contacts. A first notch groove with a large groove width through which the movable conductor passes, and a pair on both sides of a groove width smaller than the width of each contact point, which is cut from the depth of the groove and offset from the center line in the width direction of this groove on both sides parallel to each other. the second of
The area of this second notch groove is larger than the area of each upper contact surface, and each arc extinguishing plate of the central pole of the three poles has a notch cut from the front end on the contact side. An alternating current circuit disconnector, characterized in that it has a cutout groove of the same size as the first cutout groove. (2) The AC circuit breaker according to claim 1 of the utility model registration claim, wherein the fixed side pressure reflector is provided with a slit from the through hole to the side where the arc moves. (3) The AC circuit breaker according to claim 1 or 2 of the utility model registration claim, wherein the movable side pressure reflector is provided with a slit from the through hole to the side where the arc moves. (4) The AC circuit according to any one of claims 1 to 3 of the utility model registration claim, characterized in that the first and second notch grooves have corner portions rounded into arc shapes. Disconnector.