JPS6166509A - How to assemble gas insulated 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 [Field of Application of the Invention] The present invention relates to a method for assembling gas insulated equipment, and more particularly to a method for assembling gas insulated equipment that can capture generated conductive foreign matter.

[Background of the invention]

Gas-insulated Q equipment consists of a conductive part supported by an insulating support placed in a sealed container filled with an insulating gas such as SF, gas, etc. The gas-stop busbar ■ is known.

The spread of these types of gas-insulated equipment is remarkable, and efforts are being made to reduce the volume of gas-insulated equipment.
Countermeasures against sexual foreign substances have become an issue. It is difficult to completely eliminate conductive foreign matter generated during manufacturing, and the problem is how to reduce this.

Conventional methods for removing foreign matter during the assembly process of gas insulation and edge equipment include sucking it up with a vacuum cleaner at the final stage of assembly, or 2) wiping it off with a cloth or paper. However, even with such a method, it is difficult to sufficiently remove foreign substances. For this reason, when the gas insulated equipment is operated, 54 electrical substances are mixed in, and the P edge strength is reduced to C.
This was causing a decline in

[Purpose of the invention]

An object of the present invention is to provide a method for assembling a gas disconnection generator in which insulation reliability is improved by effectively removing energizing materials before operation.

[The ridges of invention]

The present invention captures conductive foreign matter during the generation process or mixing process, and uses an electret member that is a permanently charged body,
That is, using a pyroelectric member, conductive foreign matter is removed by removing the conductive foreign matter by removing the pyroelectric member before operating the device. do.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be explained with reference to drawings.

The drawing is a longitudinal sectional view of a gas barrier MrI:d, which is an example of a gas vaporizer. In the grounded tank 1, there is a cutoff part that shields the movable from the pole 2 and the fixed electrode 4, which are connected to the insulating support 10. It is supported insulated from the ground tank l by IIK. Although the illustrated example is shown as a book with 42 cut-off points, there is no limit to the number of cut-off points.

The shutoff operation is performed by driving the feed frame 12 in response to an external command, and driving the movable electrode 2 through a link mechanism built into the machine part 5, so that the 1st and 4th stops (15flllll)
Is it movable with respect to the arc generated by K? Blowing of gas from a nozzle 3 provided surrounding the LL pole 2 is blocked. A shield electrode 5.7 for electric field relaxation is attached to the movable electrode 2 and the fixed electrode 40 times, and a contact 8 is connected to the fixed electrode 4. The M N'S conductor is connected and the opening 30 is sealed by other gas insulated equipment. When the circuit breaker having the above-mentioned configuration is operated, the grounding tank 1 is filled with SF, NS, etc.

When the circuit breaker constructed in 5KIM is subjected to a movable operation test during the first assembly and final assembly process, a considerable amount of conductive foreign matter is generated. For example, since bolts 9 are used to attach the illustrated shield 7, a small amount of conductive foreign matter is generated from the tightening portion C when the bolts 9 are tightened. In addition, in the movable operation test, 41W foreign matter was generated from the sliding parts. The conductive foreign matter generated in step 5 is
It does not necessarily fall to the bottom of the grounded tank 1, and the shield 6
．． 7 or the corner of the grounding link 1. In order to remove such conductive foreign matter, pyroelectric members, that is, electret members 20 to 24 are formed into a sheet and spread inside the circuit breaker being assembled, as shown in the left half of FIG. The right half of the blocking section is also covered with an electret member, but is not shown here. In the electric left member 20.22, conductive foreign matter is attached to the insulating support 1.
The outer surface of the insulating support is surrounded to prevent it from adhering to the surface of the insulating support. Also, the electric left member 23.
24 is attached to the shield 6.70 to prevent conductive foreign matter from entering the shield 6.7, which would be difficult to remove later.
It is placed at the bottom. Further, the electret member 21 is spread over the lower half of the grounded tank 1 to capture fallen conductive foreign matter.

By doing this in step 5, conductive foreign matter generated during assembly or during a movable operation test is attracted by the electrostatic attraction of the electret member. Therefore, by removing the electret member from the inside of the device at the latest before operation of the circuit breaker, for example, just before it is finally shut off from the outside air and sealed, it is possible to remove the 9m long conductive material, which was difficult to remove in the past. That's possible.

This electric left member has an extremely long charge discharge time constant and can maintain semi-permanent static electricity. In other words, 1. Unlike normal charging, it exhibits sufficient dust collection power even during the rainy season when humidity is relatively high. In addition, once used electret members can be cleaned separately after being removed from the gas-grade oven, and even when handled in this way, the electrostatic force is maintained.

In this way, 4 is generated during assembly and remains during operation.
Electrical foreign matter can be kept to a minimum, and the deterioration in feed line performance that was threatened in the past can be prevented. In particular, in gas equipment with movable parts, such as circuit breakers, gas insulated disconnectors, ground switches, etc., minute conductive foreign matter generated during the reversing operation test performed at the final stage of assembly is particularly important. It is extremely effective because it can be removed reliably.

In the above embodiment, a switch was explained as an example of gas-free R equipment, but it can also be used for a gas-insulated motherboard in which a conductive part is supported by an insulating support in a grounded tank. Alternatively, if you cut the electret material into pieces that can be vacuumed up with a vacuum cleaner and spread them inside the grounded tank 1,
The electret member can be collected with a vacuum cleaner at the latest before operation. Furthermore, the electret member of the pyroelectric member may be placed in the grounded tank before the movable operation test.

〔Effect of the invention〕

As explained above, in the present invention, a pyroelectric member is placed in a grounded tank, and after the pyroelectric member adsorbs and captures conductive non-sugar, the pyroelectric member is removed from the grounded tank at the latest before operation. By removing the conductive foreign matter from the pyroelectric member, it is possible to remove the conductive foreign matter that causes a decrease in the dielectric strength of the equipment in the 117! As a result, gas insulated equipment with improved insulation reliability can be obtained.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view showing an example of gas insulated equipment to which the assembly method of the present invention is applied. 1... Ground tank, 6, 7... Shield electrode, 10.11... Insulating support, 20, 2
1,22゜23.24...Electret member.

Claims (1)

[Claims] 1. In a gas insulated device in which a conductive part is supported by an insulating support in a grounded tank, a pyroelectric member is placed in the grounded tank, and the conductive part generated in the grounded tank is A method for assembling gas insulated equipment, characterized in that the pyroelectric material is adsorbed by the pyroelectric member, and then the pyroelectric member is removed from the grounded tank at the latest before operation. 2. In the item described in claim 1 above, the pyroelectric member is shredded to the extent that it can be sucked up with a vacuum cleaner, and the pyroelectric member is removed from the grounded tank using the vacuum cleaner. Features: How to assemble gas-insulated equipment.