JPS6117160B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching a shield cover for corona prevention in high-voltage electrical equipment.

When attaching a corona shield cover to the head of a high-voltage electrical device for testing, conventionally, as shown in Figure 1, after the electrical device has been assembled, it is attached to the support bracket 2 provided on the side of the head of the electrical device 1, and is divided into three parts, as an example. The corona shield covers 3A, 3B, and 3C were assembled together in the directions of the arrows shown in the figure, and attached with screws.

In this case, since the corona shield cover is attached to the head of the electrical equipment, for example, for equipment with AC1500KV, it must be installed at a height of 10 meters or more above the ground. At such a height, the divided diameter
In order to install a corona shield cover that is over 2 meters long, scaffolding must be set up, which is an extremely difficult task.

In addition, the corona shield cover has a roughly spherical shape when assembled, but since it bends and deforms when separated, it must be held carefully by multiple workers during installation to avoid the risk of deformation. This makes working at heights particularly difficult. Furthermore, when assembling the divided corona shield covers, it is necessary to assemble the joints smoothly due to the nature of corona prevention, but since the corona shield cover is made of aluminum, it is important to avoid vibrations during transportation. This also makes installation difficult.

The present invention overcomes these drawbacks by pre-integrating the corona shield cover so that it can be easily installed. The details will be explained below.

FIG. 2 shows an embodiment of the present invention, in which a fixing arm 4c is attached to the top of the electrical equipment 1 in advance to a supporting part 4a.
Attach it by. On the other hand, the corona shield cover 5 assembled in one piece has a mounting base 4b that also serves as reinforcement fixed in advance to a predetermined location on its inner surface. It is placed over the support part 4a to cover the top of the electrical equipment 1. Then the third
As shown in the figure, the corona shield cover 5 is fixed to the top of the electrical equipment 1 by screwing and fixing the mounting base 4b and the fixing arm 4c from the outside of the corona shield cover 5 using countersunk screws 9 and 10.

According to the above configuration, the corona shield cover 5
Since the corona shield cover 5 is already integrated, the work of fixing it to the electrical equipment 1 is different from the conventional method and can be done much more easily. Since it is fixed to the fixing arm 4c via the mounting base 4b in a fixed state, the corona shield cover 5 can be easily attached to the electrical equipment 1 without fear of deformation or the like.

In addition, after installing the corona shield cover 5,
If it is necessary to transport and install the entire electrical equipment 1 in a predetermined position, as shown in FIG. In addition to providing
The integrally formed corona shield cover 5 also has
Correspondingly, a through hole 7 is provided, and a lifting eye bolt 8 is attached to the tap hole 6 through this through hole 7, and the entire electrical equipment 1 is lifted together with the corona shield cover 5 by the eye bolt 8 and placed in a predetermined position. Transport and install.

In this way, no force is applied to the corona shield cover 5 due to lifting during transportation, and there is no possibility that the corona shield cover 5 will be distorted or deformed.

As explained above, according to the present invention, it is possible to attach a corona shield cover to an electrical device without having to assemble the corona shield cover, which is divided into multiple parts as in the past, by working at high places. It is only necessary to attach the corona shield cover, which can bring about great effects such as saving labor and shortening the required time.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view showing a conventional corona shield cover attached state, and FIGS. 2 and 3 are explanatory views showing an embodiment of the present invention. 1...Electrical equipment, 4a...Support part, 4b...Mounting stand, 4c...Fixing arm, 5...Corona shield cover.

Claims (1)

[Claims] 1. The corona shield is made up of a support part that is installed on the top of the electrical equipment and has a fixing arm fixed to it, and a corona shield cover that has been integrally formed in advance and has a mounting base that also serves as reinforcement fixed to a predetermined location on the inner surface of the support part. After the cover is placed over the support part through the opening provided in the corona shield cover to cover the top of the electrical equipment, the mounting base and the fixing arm are screwed together from the outside of the corona shield cover. . A method for attaching a corona shield cover, comprising: fixing the corona shield cover to the electrical equipment by firmly fixing the corona shield cover.