JPS5857231A - Electrode for vacuum breaker - 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 The present invention relates to a vacuum breaker O'#1, etc., and to an electrode for a vacuum breaker that can be easily tripped.

Generally, Ou or Ou gold alloy with good conductivity is used as electrodes in vacuum interrupters.
U or Ou gold alloy has excellent electrical conductivity, but has the disadvantage of poor voltage resistance and interruption of high voltage current, making it unsuitable for KFi.9 To eliminate this disadvantage, these fixed electrodes,
For the movable electrode, a so-called 1-alloy, which has excellent withstand voltage characteristics, is used.However, the fixed electrode and movable electrode, such as 10 alloy, have high withstand voltage characteristics, so they are not universally used to interrupt high-voltage currents. However, due to the arc generated during the closing and closing of a part of the contact surface of the electrodes, the abnormal temperature (K) rises, and a bath bonding phenomenon occurs in which the electrodes partially decompose and fuse together.This phenomenon occurs. is the reaction force due to concentration of current.

This will affect the reduction of contact force due to electromagnetic force and wear of the contact surface due to chattering during input. Due to its high strength, it is impossible to trip with a small operating mechanism.9 Therefore, a large operating mechanism is required, and there are six problems in that the vacuum interrupter becomes large.

The present invention has been made in conjunction with the above-mentioned 1III/c, and its purpose is to reduce the tensile strength ν. To provide an electrode for a vacuum breaker, which comprises an electrode using an alloy, has excellent withstand voltage, and is capable of cutting off current to a container even when the electrode is welded.Hereinafter, the present invention will be described. will be described in detail with reference to the drawings showing one embodiment thereof.

l shown in Figure 1 is a vacuum S which is an insulating material! -deai0
This vacuum vessel/KFi fixed rod J is equipped with a fixed electric current of 1 kJ, and a movable rod J having a movable electrode that can be moved up and down via a bellows L is housed to form the electrodes of the vacuum breaker. Electrode J.

The movable electrode is composed of a disk-shaped arc drive section 1.4 and a contact section 7.7 formed in a concentric circle≦disc shape at the center of the arc drive section 4.4. O Figure 2 shows the electrodes of a vacuum breaker with a simplified electrode configuration. Vacuum capacity I
In addition, the movable electrode 3 is housed in the 9th movable lot 3, and the 01st and identification electrodes are housed in a vertically movable manner via the bellows 1.
The configuration of the movable electric lever can be selected depending on the purpose of use.In order to reduce the tensile strength of the contact portion 7.7, the fixed electrode, or the movable electrode, either of these configurations can be selected. One or all of them, for example ν or Or, town.

y whose main components are at least two types of Mn.

It is formed by press-molding and sintering metal powder, which is an alloy, and part or all of which has an austenitic structure at room temperature.

When the metal powder is, for example, austenitic stainless steel made of 1·e N1 w 'r, it is possible to form a 16 alloy which is particularly non-magnetic and has good voltage resistance.

Pressure molding of metal powder and sintered MFi have a strong influence on the drag strength, so as shown in Figures 3 and 4, 1 & 21! /ed or less and pressurize and mold at a pressure of 4.5 t/m. This makes the tensile strength [t12 & $/- or less] Also, this pressure forming eliminates the need for post-processing after sintering. Become.

The sintering after forming is carried out at a temperature of 900° C. or higher in any one of the following atmospheres: vacuum, which is advantageous for XK, hydrogen, which is advantageous for reducing properties, and decomposed ammonia, or in two IF concave atmospheres. From the viewpoint of sintering conditions (holding time is 10 minutes or more), it is desirable to shorten the holding time by increasing the temperature, for example holding at too much °C for 5 minutes. Since a high-temperature furnace is required, general KFif
The contact portion 7.7, the fixed electrode, and the movable electrode constructed in this way have a temperature of 0X1 degrees at point 1, as shown in FIG.
Compared to 5G11/-, it is less than that cow, i.e. 28 mtip.
/-0, which is less than or equal to 0. As a result, the contact portion 7. Even if bathing occurs between the 11 and 11 stations, these operations can be carried out very easily using a conventional operating device (not shown), and the vacuum breaker can be made more compact. Although the embodiment in which the contact portion 7.7 or the electrodes J and D are made of a ν alloy having an austenitic structure has been described above, the present invention is not limited thereto; In this 92nd embodiment, the contact portion 7.7 or the fixed voltage value KO, and the movable voltage 1kl may be constructed by using any of them in order to reduce the tensile force *[. One or all of them, for example ' 411 '' r
eM! A metal powder consisting of 10 alloys containing at least two or more of the following as main components, part or all of which has a ferrite structure at room temperature, is press-formed under predetermined conditions. and is constructed by sintering. In this case, for example, if a metal powder of 7 elite stainless steel, such as F1a or more, is pressure-molded and sintered, it is a magnetic material and is suitable for use as contact parts J, J or electrode-5q for the vertical magnetic field, and is suitable for use in the first embodiment. In this second embodiment, it is possible to construct a material having a conductivity higher than that of austenitic stainless steel. Pressure molding of gold powder.

Yaki#! The predetermined conditions regarding FK are the same as those in the first embodiment described above, and the same conditions as shown in FIGS. 3 and 4 are used.

Himetsu s7.7 and nIE fake cos configured in this way,
As shown in Figure 6, the tensile strength of 46
h/- and becomes less than 215M1p/-. For this reason, the contact portions 7, 7, which are made of magnetic material and are suitable for longitudinal magnetic fields and have good conductivity. Or, it is possible to configure the electrodes and the contact parts 7 and 7 or the electrodes and the electrodes.
igll! Effects similar to those described in Examples - t 1
1 ◇ As explained above, in the case of a vacuum interrupter in which a fixed electrode and a movable electrode are releasably housed in a #4Fi vacuum container, the fixed electrode and the E'Tll111
A part of the pole is formed into a predetermined shape by an F-alloy made by press-molding and sintering metal powder having an austenite structure or ferrite! Since it is an electrode, it is easy to manufacture electrodes with low tensile strength, and even if welding occurs between the electrodes, there is no need for a strong and large operating device tube, and the current operating device can be used in an extremely heavy and heavy manner. Therefore, it is possible to miniaturize the interrupter.Also, it is a material with good conductivity and can be used for applications such as OIK kettles for vertical magnetic fields. By doing so, you can achieve 11 effects.

[Brief explanation of the drawing]

K l II, Volume 8, Figure 4, Cabinet, Rattan 6
ai shows an example of Kiyoshi's laughter, Figure 5jl1, Figure 3 is *
**The cylindrical straight m-゛ figure shown, the recommended figure 8 is a drawing showing the relationship between the density of ν, 1 alloy and tensile strength 9511, and the iris 4 kaku shows the relationship between the density and molding pressure of 1° alloy! llm1. lll1
δ-kaku. The 6th cabinet is pulled! 19 is a drawing showing the 01111 meeting. I...Vacuum vessel, 1...Constant electrode, 3...Fixed rod. μ...Movable electrode! ... Movable rod, 1... Arc sliding part, 7... Qin contact part, t... Bellows. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] (1) In a vacuum breaker e) electrode in which a fixed electrode and a movable electric cable are housed in a vacuum container so that they can be separated from each other,
Is at least one of the fixed electrode and the movable electrode formed by pressure molding and sintering a gold metal body having a partially or entirely sK austenite structure or ferrite structure? , a vacuum interrupter electrode characterized by Kuragane's multi-optical configuration. (2) Claim 1: A vacuum breaker electric @, characterized in that the first product is a 4kK electric current of Kisoft's vacuum breaker, and the movable electrode is made of the v1 alloy. (3) In the vacuum interrupter electric lamp according to claim 1, the fixed electrode is made of the sheath alloy, and at least one contact portion t of the movable electrode is formed with austenite fibers in a part or all of it. Or the vacuum eyelid ao'rt pole, which is patented as pH-formed by a ν alloy made by press-molding and sintering metal powder having a ferrite composition. (5) In the electrode of the vacuum breaker according to claim fl1wL4, the contact portion of the movable electrode is
Electrode of vacuum interrupter characterized by #1 made of alloy <62 In the vacuum interrupter electrode 1k according to claim 4, the contact portion of the fixed electrode is 1. Electrode O of a vacuum breaker made of alloy