JPS58111203A - Coating material for gas insulating equipment - 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 coating material for gas insulated equipment, and more particularly to a coating material for gas insulated equipment that is suitable for providing good characteristics against mixed conductive particles.

Conventional gas-insulated equipment, such as gas-insulated busbars or grounded conductive sheaths of switchgear, has been coated with anti-rust paint. When this was mixed with thick particles, and the anti-rust paint was an insulator, wire-like particles would stand up at right angles to the sheath when it was charged. If you stay in this restless standing position for a long time, you will be relieved.
It was a rare occurrence that a surge or one surge was applied, which was higher than the pressure, causing dielectric breakdown from the tip of the verticle.

It is an object of the present invention to provide a method for preventing the assembling of soil bar plates in No. 41.1.

In other words, the present invention aims to reduce the degree of levitation of acidic particles mixed in the corps 1 to the same level as that of dandel, and even if they surface, the 1&standing state will be ridged. It will complete the cycle within a few minutes.In order to increase the levitation field of conductive particles, it is good to cover the conductor or sheath with an insulating material, but once the particles float, they are in an upright state. The latter phenomenon occurs because the conductive particles have an electrical property of +M, and in order to solve this problem, it is necessary to make the insulator have excessive resistance and make the gable tube. All you have to do is release it.The bottom line is that the conductor or sheath is coated with a material that satisfies the following relationships: 100≧pg-a, ≧0.01 (sec).Here, C0: Vacuum inductivity , e.: Northward conductivity of material, P: Specific resistance of material, Hereinafter, one embodiment of the present invention will be described as the first example.
This will be explained with reference to figures (a) and (b).

The phase-separated gas insulator M1 consists of a central conductor 2 that conducts current at a voltage, a sheath 3 that fits in a grounded pressure vessel, a spacer 4 that insulates and supports the central conductor 2, and an 8F gas 5 of several atmospheres. has been done. Furthermore, 100≧ε. ε, p≧0,0
1・・・・・・・・・・・・・・・・・・・・・・・・
The inner surface of the sheath 3 is coated with a material 6 of (1).

FIG. 2 is an explanatory diagram showing the principle of the present invention. The sheath 3 is coated with a material 6 that satisfies the conditions shown in equation (1). When conductive particles 10 are mixed, the levitation electric field strength increases to the same level as when the material 6 is an insulator, as shown in FIG. That is, in FIG. 3, ρg, g of material 6 is 0.01 sec or more, and the floating electric field strength of particles is -e08. is 10'
This is more than 90% of the case of about sec. To achieve the purpose of the present invention, as the lower limit values of ρg and ε, Q, Q I
It is Sec.

As a result, the lower limit of equation g(1) is set to Q, Q I Sec, and 7h0. On the other hand, in the case where the paper particles 10 float, the material 6 becomes P! as shown in FIG. , d Va, the stem does not stand up or stagnate for a long time, but becomes active within several tens of minutes after the ridge cycle. That is, as is clear from FIG. 4, the time it takes for the erected particles to start moving again is ρε for the material 6. ε.

It depends on the seal and has variations. ρεot− is Q, Q
For ISCe, the time is 0. Ol se(～
Q, 93 sec, ρgQ ' m is l Q Q Se
In the case of c, it will be about 100SeC to 300SeC o
Generally, it takes several minutes to an hour at most to trap particles using G I S VC & G! The shorter the time, the better the trapping technique.

Particle trap devices (not shown) are usually provided at intervals of several meters or more in gas-insulated busbars, for example, and can be safely moved by several dozen jumps before trapping particles at a far position. Therefore, 586
If M is l Q Q Sec, the time from particle standing up to the start of movement is 100 secC ~ 3 Q Q s
If ec is crossed several dozen times, particles will be trapped. The time required to reach the trap is 3000S6
C~10000! It will be about IeC. Tsumashi, ρε of material 6. The upper limit of e is Fi I Q Q s6 (.Since the conductive particles 1o can move as shown in Fig. 2, they can be trapped by a separately provided trap device (not shown). Moreover, the insulation reliability of the gas bus bar can be improved.

FIG. 5 shows an example of application of the present invention, in which the center conductor is also coated with the material according to the present invention.

In this case, the effect of increasing the surface dielectric breakdown electric field strength of the center conductor 2 is obtained, and the conductive birch 2
It is possible to eliminate the phenomenon in which the metal remains permanently attached to the coating 6 of the center conductor 2.

Although only a gas insulated bus bar is illustrated as an embodiment of the present invention, it goes without saying that the present invention is applicable to all gas insulated equipment configured to form a pair of electrode portions in an insulating gas atmosphere.

According to an embodiment of the present invention, by coating the conductor or sheath of the cast insulator with a material satisfying 100≧6゜ε, ρ≧0.01, the levitation of mixed sleepy particles - field strength is reduced. The box can be raised to the height of an insulated pot, and even if it floats, it becomes active within a few cycles to a few minutes, eliminating the need to stand for a long time.

As is clear from the foregoing, according to the present invention, it is possible to prevent particles from standing up, and to improve edge reliability.

[Brief explanation of the drawing]

FIG. 1(a) is a side view of an embodiment of the present invention, FIG. 1(b)
is a front view of the embodiment shown in FIG. 1(a), FIG. 2 is an explanatory diagram showing the principle of the present invention, FIG. 3 is a diagram of floating electric field strength characteristics of particles according to the present invention, and FIG. FIG. 5 is a diagram showing the movement time of such standing particles, and is a side view showing an example of application of the present invention. 1... Gas insulated bus bar, 2... Center conductor, 3... Sheath, 4... Spacer, 5... SF@ gas, 6...
...Materials, No. 10, Figure 1, Figure 2, t. Horror 3 figure Yε, ε5 (S) Yε・and s (5)

Claims (1)

[Claims] 1. A gas insulator comprising a four-layer conductor, a four-proof grounding element arranged in an insulated state with respect to the conductor, and an insulating gas filled in the space between the grounding part and the conductor. -In the area organ,
On at least 10,000 surfaces of the conductor and the grounding part, 100≧ρξoε, ≧0.01 (seconds) (where ε is the electric contact rate in vacuum, ε is the relative dielectric constant of the material, and ρ is 11. A covering material for gas insulated equipment, which is provided with a material having characteristics that satisfy the following: