JPS6149350A - Switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a switch, and more specifically, at least/a pair of contacts are made of an arc edge body together with an arc extinguishing plate that cools an arc. stored in the body of the bag,
The present invention also relates to an opener in which an arc runner is attached to a fixed contact.

[Conventional technology]

Figures 1 and 2 show a conventional switch of this kind, in which a fixed electrode 1 and a movable electrode 1, which are arranged opposite to each other, are attached to the pole, and a fixed contact 3 and a movable contact, Q, are attached to the pole and 2, respectively. and constitute a pair of contacts. The υ operation mechanism part jlc is connected to the base end of the movable electrode λ, and the movable electrode
A plurality of arc-extinguishing plates 6 are arranged between the poles 1 and 1, where a horseshoe-shaped helmet is formed and for cooling the arc generated between the contacts 3 and 9. The enclosure 7 is made of an insulator and houses the operating parts of the switch.The enclosure is provided with an arc or hot gas outlet g.

An arc runner 7 is attached to the fixed electrode.

With the above configuration, if the movable contact V is now in contact with the fixed contact 3 as shown in the gj diagram, power is supplied from the power source to the fixed ℃ pole/→fixed companion point 3→possible! bR1 point.

9 → Via the movable cabinet (company), be supplied to the load play.

In this state, when a large current such as a short-circuit current flows between the contacts, the operating mechanism section j operates to separate the movable contact from the fixed contact 3. At this time, as shown in FIGS. 1 and 5, an arc A is generated between the fixed contact 3 and the movable slave point q, and an arc voltage is generated between the fixed contact J and the movable contact 1. This arc voltage increases as the separation distance of the movable contact 3 from the fixed contact 3 increases. Also.

At the same time, the arc A is attracted by magnetic force and extends toward the arc-extinguishing plate side having the horseshoe-shaped groove, so that the arc voltage further increases. Then, when the arc current reaches the 7F flow zero point, the arc A is extinguished and the current is cut off.

Considering the above operation in more detail with reference to FIG. 5, which shows the time when the first current is cut off, the movable electrode rotates about the rotation center IQ and opens. With this opening operation,
The spatial distance between the movable electrode λ and the fixed electrode is as short as the distance between the abdomen 2a of the movable electrode and the tip la of the fixed electrode l. On the other hand, the arc A generated between the movable contact and the fixed contact J receives an electromagnetic force from the current I/ flowing through the fixed electrode / and the It flow ECO flowing through the movable electrode Y, and the resultant force is the direction of the arrow F. 8 However, this electromagnetic force is
The electrode structure is relatively small because the current flows linearly when the movable contact is closed as shown in Fig. and the fixed contact 30, the abdomen 2a of the movable electrode
and the tip of the fixed electrode l by a short distance.

It stagnates there. Therefore, in Figure 1, the contact point J.

There was a problem in that the arc A did not come into contact with the arc extinguishing plate O located on the right side of the arc, and the arc A was not cooled, making it impossible to obtain the desired interrupting performance.

Moreover, even if the distance between the abdomen 2a and the tip part/a is not particularly short as described above, the arc path is
In many structures, the distance between the movable contact φ and the movable contact φ is short, and in this case, the arc A is connected to the contact 3. It stagnates in between. Thus, even though the arc A was cooled by the arc extinguishing plate B, contact wear was accelerated due to stagnation of the arc on the contact, causing a serious problem in upgrading the breaking capacity of the switch.

In order to solve the above problems, the present inventors proposed a fixed contactor as shown in Fig. 1. Namely.

An arc runner with a horizontal U-shape and a notched groove/9C formed in the center. Fixed tube, @! , / / and fixed [fixed contact /3 attached to pole l/ is in the notch groove /
It is located within q c.

The operation of such a structure will be explained with reference to FIGS. 5 to 7. Figure 5 shows the electrode when it is closed, and the tip part 2a of the movable electric contact/Y to which the movable contact/LI is attached extends beyond the position of the movable contact/Hiroshi to form an arc horn. ,
The tip part/, a part of 2a is the notch groove t of the arc runner/wa
I am facing ic. Figure 6 shows the initial state of contact opening in the current interrupting operation.
It's in between. As the opening progresses, the arc runner/? When the distance between a part of the movable electrode 12 and the tip/ufi of the movable electrode 12 becomes shorter.

As shown in FIG. 7, arc A immediately moves to contact point /J,
/lI to between the arc runner 12 and the tip/comi. At this time, the tip end part 2a acts as an arc horn, and the arc A is at a short distance from the movable contact point 2a due to the transfer, so that wear and tear on the movable contact point 2a is significantly reduced. Further, since the arc A is strongly pressed against the arc-extinguishing plate on the right side of the contact and is cooled, the current blocking performance is also improved.

[Summary of the invention]

This invention is achieved by providing a fixed structure for the fixed cross-pole grounder and arc runner shown in FIG.

This is intended to extremely accelerate the transition of the arc, thereby minimizing wear on the contacts, and significantly improving current interrupting performance.
A bent piece having an arc transition surface facing the tip of the movable electrode is provided when the electrode is closed.

And electrically connect the end of the bent piece and the fixed electrode with M Mat
The present invention provides a switch made of the following.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 5 to 73. Figures 1 to 1O show the configuration of a fixed electrode // provided with a fixed contact /j and an arc runner /9 attached to the fixed electrode l/, and a notch formed in the arc runner /q. Fold the front edge of the bottom of groove/9c toward the fixed electrode 1i to form a bent piece/? d is integrally formed, and the fixed end of the bent piece /9d is electrically connected to the pole /l. Folded piece/
? The front surface of d forms the arc transition surface, 2.2.

Fixed with arc runner 19 installed? ff, pole l/.

As shown in FIG. 11, it is arranged in combination with a movable electric switch having a movable contact point. As shown in Figure 1, when the electrode is closed, a part of the tip end /2a of the movable front pole /2 is cut into the notch groove /? of the arc runner /9. C, and the tip end /Ua and the arc transition surface 2-2 face each other. The other configurations are the same as the conventional one.

Next, the operation will be explained. When the movable type ■-/2 rotates from the electrode open state shown in Figure 11 to start opening, an arc is generated between the fixed contact /3 and the movable contact /%, and the arc Releases conductive hot gas into the space around the arc. When this high-temperature gas fills between the tip 2a of the movable electrode 2 and the two arc transition surfaces of the arc runner, dielectric breakdown occurs between the tip 2a and the arc transition surface 22, and the first As shown in the figure, the arc A is at the tip/λa
and the arc transition surface, 2.2. here.

Since the area of the arc transition surface 220 is large, the insulation between the arc transition surface 1 and the tip/comi becomes more likely to break down stochastically, and the timing of the transition of arc A is accelerated, causing the arc to close in a short time. Metastasis occurs.

When the arc transition occurs early in this way, the time during which the arc remains stuck at the contact point /3°/Hiroma is shortened, so that the wear of the contact point is significantly reduced.

Arc A transferred to two arc transfer surfaces as described above
Is it a folded piece? The end of d is fixed'! Since it is electrically connected to the
receives a force in the direction of This power allows the Ark people to become the 13th
As shown in the figure, it is driven to the right and is strongly pressed against an arc extinguishing plate (not shown) having a horseshoe groove formed therein, thereby being cooled. Then, by this cooling, current interruption is achieved at the current zero point.

Thus, the bent piece forming the arc transition surface, 2.2/'
? By means of an electric path where d is in contact with the identification electrode/l.

Folded piece/? '1[L current I/ flows through d, and the electromagnetic force generated by this current flow quickly moves the transferred arc A toward the arc-extinguishing plate, shortening the current interruption time and ensuring reliable current breakage. [Effects of the Invention] This invention provides an arc runner with a bent piece that forms an arc transition surface facing the tip of the movable 1π hinoki when the electrode is closed. With a simple structure in which the ends of the bent pieces are electrically connected to fixed electrodes, consumption of the contacts can be minimized and current interrupting performance can be significantly improved.

[Brief explanation of the drawing]

Figures 1 to 7 show a conventional switch, Figure 1 is a partially sectional plan view, Figure 2 is a cross-sectional view taken along the ■-■ gland of Figure ¥1, and Figure 3 is a cross-sectional view of the conventional switch. FIG. 2 is a view corresponding to FIG. 2 showing the operating state, FIG. Figures 1 to 1J show an embodiment of the present invention. Figure 5 is a partially cutaway and partially perspective view, Figure 9 is a partially surveyed view,
f! FIG. 410 is a partial plan view, FIG. 11 is a side view of the main part, and FIG. 12 and FIG. 1J are side views of the main part showing the dynamic r/hi state. 6. Arc extinguishing plate, 7. Envelope, l/... Fixed electrode, /2
・・Movable FL pole, /, 2a・・Tip, /J・Fist fixed contact, /Hiroshi・Nose movable contact, /De・・Arc runner, /9c
・Notch load, /qd-・bent piece, uni・e arc transition surface. In each figure, the same reference numerals indicate the same or corresponding parts. IQ j Flame 8 figure W:) 10 figure

Claims (2)

[Claims] (1) A contactor consisting of a fixed electrode and a rotatable movable electrode,
an arc extinguishing plate having a horseshoe-shaped groove formed therein; an arc runner having a cutout groove formed in the center and attached to the fixed electrode; and an electrode closing plate formed integrally with the arc runner at the bottom front edge of the cutout groove. A switch comprising: a bent piece having an arc transition surface facing the tip of the movable electrode and having an end electrically connected to the fixed electrode; (2) The switch according to claim 1, which includes a horizontal U-shaped arc runner.