JPS6149352A - 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, a contactor consisting of at least l pairs of fixed electrodes and a movable electrode is connected to a plurality of contacts for cooling an arc. Along with the arc extinguishing plate,
The present invention relates to a switch which is housed in an enclosure made of an insulator and has an arc runner attached to a fixed electrode.

[Conventional technology]

Figures 1 and 2 show a conventional switch of this type, in which a fixed contact J and a movable contact φ are respectively attached to a fixed electrode l and a town moving electric switch placed opposite each other. It constitutes a contactor. The base end of a movable electrode 2 is connected to the operation mechanism section 5, and the movable electrode 2 can be rotated.

Electrode 1. At the second point, several arc extinguishing plates 6 are arranged to cool the arc that occurs between the contacts 3 and 9.

The enclosure 7 is made of an insulator and houses the main body of the switch. The enclosure is provided with an arc or real gas outlet. An arc runner is attached to the fixed electrode.

With the above configuration, when the movable contact Hiroshi is now in contact with the fixed contact J, power is transmitted from the power source to the fixed electrode 1 → fixed contact 3 → movable contact φ → movable electrode -.

It is supplied to the load side via a straight line. In this state, a large current such as a short circuit current flows through the electrode l.

When the current flows between the two, the operating machine part j moves #JI8 and separates the movable contact V from the fixed contact J. At this point, an arc is generated between the fixed point J and the movable contact.

An arc voltage is applied between the fixed contact J and the movable contact 9.

This arc voltage increases as the distance p'rl NI pi''l of the movable contacts A, 7 with respect to the fixed contacts A, 7 increases.

At the same time, the arc is drawn toward the arc-extinguishing plate 6 by the magnetic force and extends, so that the arc voltage further increases. Then, when the arc current reaches its twilight, the arc is extinguished and the current is cut off.

However, in general, the arc that occurs occurs from the position between the movable contact point J and the fixed contact point J due to the opening operation of the movable electric type K.
As shown in FIG. 3, the movable 7-pole pole is moved to a short distance I4 between the crotch part 2a and the tip part /a of the fixed electrode.
It's fun there. Therefore.

In the figure, the arc extinguishing plate 6 is located on the right side of the contacts J and M.
There was a problem in that the arc A did not come into contact with the arc A and the arc A was not cooled, making it impossible to obtain the desired interrupting performance.

In order to solve the above problems, the present inventors installed a fixed arc runner as shown in Figure V. Worked for 5 years.

In other words, it has a horizontal U-shape with a notch in the center. Arc runner l? fixed on a fixed electrode //,
Fixed contact /J attached to fixed electrode ii is notched 19c
It is located inside.

The operation of this configuration will be explained with reference to FIGS. 5 to 7. Figure 5 shows the state when the t-pole is closed, and the tip of the movable electrode L to which the movable contact /G' is attached is the movable contact L≠
It extends beyond the position of and forms an arc horn,
Part of the tip/Ua is the notch 19c of the arc runner/9
Km.

Is Fig. 6 the initial state of contact opening during current interruption operation? show,
The arc A generated between the fixed contact /J and the movable contact LD when the contact is opened is stuck at this position VC for a while. As the electrode opening progresses and the distance between the part of the arc runner lde and the tip l2a of the movable pole 2 becomes shorter than the distance between the contact lJ and the contact point lJ, as shown in Figure @7. , Ark person is a wholesaler, contact point/J.

From /Z to arc runner /9 and the tip, transition to C. At this time, the tip part LYA acts as an arc horn, and the arc person is removed from the movable contact F by transfer, so that wear and tear on the movable contact F 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 cutting performance is also improved.

However, in the configuration of 1 or more, there is no particular problem when the high voltage is cut off, but in the area of small current or over-IV equipment, the arc energy is small, so the high temperature 4-electric gas is It has the disadvantage that it does not occur at t, but the arc transfers and is premature, and there are weaknesses due to the structure.

These weaknesses will be further discussed with reference to Figures ♂ to 7Q. λ in the figure, in the small current region, the amount of four-electrode gas generated from the arc is small, so the foot of the arc that has transitioned to arc honnade is shown by the broken line arrow T without transitioning to discontinuous inkstone. Follow the indicated route and drive in the direction of arrow T. This route is the arc runner/
Legs of 9/? , 1, which rA1 part/
fai'I - Shows irregular swinging, almost dropping the foot. The arc that travels in this way and is attracted to the several arc-extinguishing plates y and several arc-extinguishing plates A where the horseshoe-shaped notches 6a are located is located at the bottom of the horseshoe-shaped notches 6a of the arc-extinguishing plates O shown by the VC9+ line in FIG. (Il!l evil 6
b.1. .

Stop at that position. At this time, the charges were shown in Figure 10. Here, in the case of a small "F!s" flowing arc A, the energy is small and the amount of L3 gas generated is small, so the arc extinguishing plate 6 cannot be sufficiently heated (. , there will be no arc spot on the arc extinguishing plate 6.

According to one or more configurations, since the length of the arc is not sufficiently extended and no series arc spots are created, the cooling and extinguishing effects of the arc at low flow speeds are sufficient. Instead, this will lead to problems such as the arc being delayed or the ffL flow being impossible to interrupt.

[Summary of the invention]

In consideration of the above circumstances, this invention aims to also ensure the performance of the small side gate shielding, by forming a narrow groove l on one side of the bottom of the r-shaped notch of the arc extinguishing plate, and Z alternates between left and right
] The present invention provides a circuit breaker capable of sufficiently elongating the arc and effectively cooling and extinguishing the arc by arranging arc extinguishing plates of fj and 8 g in parallel.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1/-1J. Figure 1/shows arc-extinguishing plate/6;
A second horseshoe-shaped notch is formed on one side of the bottom of 6a. It is formed by forming e/6b.

The 5!1 line shows the edge of the horseshoe-shaped notch before forming the MB groove/61).

As shown in Figure 1, a plurality of the arc-extinguishing plates/6 having the above-mentioned (i/? structure) are arranged in parallel so that the narrow grooves/6b are located alternately on the left and right sides.

Next, the operation will be explained with reference to FIG. 1J. Several arc extinguishing plates /A arranged in parallel are located above the arc runner /D, and are connected to the fixed electrode // and the arc runner /A.
, The arc A that occurred due to the opening of the contact between the two is.

Simplified Arc Version/6 Thin I';:Q/A Be attracted to the part of b. In this case, since the narrow grooves /bb are arranged alternately on the left and right sides, the arc A curves several times. In other words, arc 1 path is long, and arc A is significantly elongated.

Thus, the arc is sufficiently cooled and the desired current interruption is achieved even at small currents.

〔Effect of the invention〕

As described above, the present invention has a simple structure in which a plurality of arc-extinguishing plates with details formed on one side of the bottom of a horseshoe-shaped notch are uniformly arranged in parallel to provide excellent current control from small to large currents. It realizes blocking performance and has a 5-layer effect.

[Brief explanation of the drawing]

4/Figures to Figures 3 show conventional switches, Figure 1 is a partially sectional plan view, Figure 2 is a sectional view taken on the ff-4 line of Figure 1, and Figure 3 is a cross-sectional view taken along the ff-4 line in Figure 1. This is the first figure portrait showing Mr. S in action. 9 to M10 show another conventional switch. 7 is a partial perspective view, FIGS. 5 to 1θ are views showing operating modes, FIGS. The figure is a plan view of the main part, and FIG. 10 is a side view of the main part. Fig. 11 - Military/Fig. J shows an embodiment of the present invention;
Figure i is a partial plan view, Figure 12 is a partial perspective view, and Figure 1J is a side view of a main part showing the operating mode. 7...Enveloping body, //...Identification electrode, /2...Movable electrode,
/2a・°tip, /J・・Fixed contact. 7%...movable contact, /6...arc-extinguishing plate, /Aa...horseshoe-shaped notch in calculation, /Ab...narrow groove, /? ...Archrunner,/? C. First horseshoe notch. In each figure, the same reference numerals indicate the same or corresponding parts. Flood 1 Figure Horse 2 Flood 4 Figure Gong 5

Claims (1)

[Claims] A fixed electrode to which a fixed contact is attached, a rotatable movable electrode to which a movable contact that comes into contact with and separates from the fixed contact is attached, and an arc runner having a first horseshoe-shaped notch and attached to the fixed electrode. a second horseshoe-shaped notch and a plurality of arc-extinguishing plates arranged in parallel above the arc runner with narrow grooves formed on one side of the bottom of the second horseshoe-shaped notch and with the narrow grooves alternately positioned; A switch equipped with