JPS59125077A - Insulation testing method of gas insulating power apparatus - Google Patents

Abstract

PURPOSE:To execute exactly an insulation test by ejecting a conductive foreign matter which is left in the inside which is difficult to be cleaned easily, of a curved gas insulating power apparatus, prior to the insulation test. CONSTITUTION:A test unit 10 is placed in a testing vessel 12 so that a linear case part 20a is inclined at an inclined angle alpha, after cleaning to remove a conductive foreign matter from an opening end 21 side of one linear case part on which an annular insulator 22 is provided, and prior to application of test voltage, preliminary voltage of commercial frequency is applied for a prescribed time so that the intensity of an electric field of an outer case 20 becomes 0.3- 1kV/mm. (RMS), preferably 0.3-0.5kV/mm.. As a result, a conductive foreign matter which is left in the outer case 20 moves, but since the linear case part 20a is inclined, and the other linear case part 20b turns downward, the foreign matter moves, repeating a random motion in the downward part from the annular insulator 22, and it is ejected from the lower opening end of the outer case 20. Accordingly, the insulation test can be executed exactly with respect to the test unit 10 by applying the test voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for testing gas insulated power equipment, such as the above-mentioned aerial cable bending unit.

For example, a curved Schnitt of a conduit aerial cable is formed by supporting an internal body with an annular insulator provided on one of the straight case parts within a lightning-shaped conductive external turret bent at a predetermined angle. 1. For the entire cable, the outer case is filled with insulation scum such as SF6 at a pressure of 2.5 to 5 Kg10++G7.
'are doing. This bending unit is filled with an insulating gas of 1 or 8 Jt, and is installed in a test box. An insulation test is performed by applying a test voltage of 1 = t between the external gas and the internal body. . However, if there is a foreign object (particle) inside the outer case, this foreign object will move due to the force of the force between the outer case and the inner tongue, and move toward the object. When moving, a phrase was written around the disconnected wire, indicating that the insulation properties of the insulator were 0 or low (7), which had the disadvantage of flashing at low voltage.

It is an object of the present invention to provide a method for testing insulation of household appliances, which can discharge the force of the test piece in front of the test piece.

When I examined the details of the glaze, I found that Figure 1 shows that the method of the present invention has not been used, and that the test results have been tested.
In the city, the power equipment test unit 1O was installed in a 12 yen test container that had been used for human training. As a test, the pressure was applied from the intermediate AC Kamei 14 to the test unit 10's circular conductor 14'L) 1□ via the test master pressure device 16 and 18 resistors.
``Concave tM15 case and same VC applied 7t/).

On the flow side of the diagram, the test unit IO shows a curved Schnitt on one of the air cables, but it may also work on other curved gas rims. As shown in FIG. 2, this test unit 10 has a four-hole outer case 20 which is curved in a curved line of )')t'rrl, and a straight-line case portion 20a of which is provided with one side. Loquat Arashimono 22
It consists of an internal tatami body 24 supported by a).

In this test unit 0 is annular insulator 2.
2. Clean the open end 21 of one straight case part 2U& by appropriate means to remove any foreign matter. The test vessel is placed in a 12-circle incline and applied for an external time period prior to the application of the n1 test voltage. In this way, the conductive substances (particles) remaining in the outer case 20 move slowly, but the straight case part 20a breaks down around 1, and the other straight case part 20b stops moving. Since it is pointing downwards, the foreign object moves randomly and returns to the annular insulator 22 in the part that has not been cleaned, and moves towards the lower opening end of the outer case 20. Ra'noF
I'll put it out. Therefore, as shown in FIG. 1, it is possible to accurately test the insulation of the KtiA unit 10 by applying a test voltage. Direction and interlocking of conductive foreign matter: Since the M degree is approximately 50α/min, the test unit is 12 m long and the lifting platform VC must be applied with a manual voltage of approximately 1,000 m. Further, the bevel angle α around 1 of the round case portion 2υa is preferable because it facilitates the ejection of large swords or foreign objects.

According to the non-invention, as mentioned above, is there a foreign matter in ηt1 remaining in the pipe part of the curved cass insulation power cutter that is difficult to clean?
Since it can be discharged immediately before the insulation test, there is a fire festival in the insulation test.

Figure 1 is a schematic diagram of the loquat test method of the present invention, and Figure 2 is a diagram showing the complete layout of the test unit using the method of the present invention. track 1li
i 1X) One side view.

10...Test unit, 12...Test container, 20...4 Warm external case, 20a
, 20 b... Direct spinning case part, 22...
...Annular insulator, 24...Internal conductor, α...
Tilt angle.

11・ Watch applicant agent patent attorney Setsu Kikuike - No. 1 Koshiki R 笥2β n

Claims (1)

[Claims] (Internal conductor force and support by the annular insulator installed in the old wire case part of the same conductive outer turret that is bent at IJ/J1). In the insulation test method for gas-insulated power equipment in which the full test voltage is applied between the external case and the internal enclosure, the front dC block ff!2
After cleaning the open end side of the linear case part with a border to remove any conductive foreign matter, one straight case part was placed diagonally with a 1" i-shape. , the electric field strength of the external case is 0.3 prior to the application of the pre-test pressure.
An insulation test method for insulated power equipment in which a vertical voltage of a jump number of 1 is applied as a percentage so that the voltage is 1 KV/ship (RIVIS). (2) The insulation testing method for a cass-insulated power device according to claim 1, wherein the inclination angle of the -10,000 linear case portion is 1 degree or more.