JPS629701Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a capacitor device.

For example, a three-phase capacitor device is constructed by storing capacitor bodies for each phase in one tank. Figure 1 shows a conventional capacitor device,
1 is a tank, and 2 to 4 are capacitor bodies. Note that 5 is a barrier for insulating between the capacitor bodies of each phase.

Incidentally, in this type of capacitor device, vacuum heating and drying is performed in order to improve electrical performance such as dielectric performance and insulation performance. In this case, the tank containing the capacitor body is placed in a heating furnace and the furnace temperature is raised to heat it. The heat on the tank wall is then conducted to the capacitor elements inside, thereby heating each capacitor element.

However, according to the conventional configuration shown in FIG. 1, since both sides of the capacitor body 3 located in the center face the other capacitor bodies 2 and 4, the area facing the wall of the tank 1 is Since it is smaller than the capacitor bodies 2 and 4, the heat received from the tank wall is correspondingly smaller, and therefore the time required for the temperature of the capacitor body itself to rise is longer than that of the capacitor bodies 2 and 4. Therefore, it takes a long time for the entire capacitor body to reach the specified temperature value.

Of course, the sides of the capacitor bodies 2 and 4 facing the capacitor body 3 also require a longer time to reach the specified temperature value, compared to the side faces facing the tank wall. The example in the figure is an example in which three capacitor bodies are arranged in parallel, but this
The same applies whether there are 1 or 3 or more.

The configuration shown in FIG. 2 solves this problem.
In this case, a heat conductive plate 6 made of iron, copper, aluminum, etc. is interposed between each capacitor body. Then, the edge of this heat conductive plate 6 is fixed to the wall surface of the tank 1. According to this, the heat from the wall surface of the tank 1 is conducted to the heat conductive plate 6 during heating and drying, and the temperature rises. At this time, the heat from the heat conductive plate 6 heats the side surface of each capacitor body that does not face the wall surface of the tank 1.

As a result, the time required for all of the capacitor bodies to reach the specified temperature value is significantly shortened compared to the configuration shown in Figure 1, and the drying conditions also reduce the variation between capacitor bodies. becomes smaller. If this heat conduction plate 6 is kept present even during operation of the capacitor device, the heat from the capacitor body will be quickly conducted to the tank wall surface, which will also be effective in dissipating heat from the capacitor body. It acts on

However, according to such a configuration, since all edges of the heat conductive plate are connected to the side wall 1A of the tank 1,
During operation of the capacitor device, the convection of the insulating oil stored in the tank may be impaired, leading to a decrease in heat dissipation effectiveness.

This idea is based on a capacitor device in which multiple capacitor bodies are arranged side by side and housed in a tank.
The side surface of the capacitor body facing the adjacent capacitor body is heated under the same conditions as the side surface facing the tank wall, and the configuration also improves the heat dissipation effect. The purpose is to ensure that there is no hindrance to the

An embodiment of this invention will be explained with reference to FIG. 3 and subsequent figures. Note that parts given the same reference numerals as in FIGS. 1 and 2 indicate the same or corresponding parts. According to this idea, the upper and lower ends of the heat conductive plate 6 whose edges are connected to the wall surface 1A are as shown in FIG.
By separating it from the top wall 1A and bottom wall 1C of the tank 1, a space 7 is formed as a flow path for the insulating oil. According to this, the insulating oil comes to flow between the capacitor bodies through the space 7.

When the insulating oil flows in this way, its convection is not impaired in any way, so the heat dissipation effect is smooth, and as a result, such a heat conduction plate 6
Even if a capacitor is installed, heating and heat dissipation of the capacitor body will be performed smoothly.

Further, instead of forming spaces at the upper and lower ends of the heat conduction plate 6 as shown in FIG. 5, a large number of holes 8 may be formed near the upper and lower ends as passages for insulating oil. In this case, since the upper and lower ends of the heat conduction plate 6 are also connected to the wall surface, the heat conduction from the wall surface of the tank is not significantly impaired, which is convenient.

As detailed above, according to this invention, when heating and drying capacitor bodies, it is possible to accelerate the temperature rise of each capacitor body and improve the overall temperature distribution, thereby shortening the drying process time. Moreover, it is possible to improve the variation in drying conditions,
Furthermore, even if a heat conductive plate is provided for this purpose, the presence of the heat conductive plate does not impair the flow of the insulating oil at all.

It goes without saying that this invention is not limited to only three-phase capacitor devices, but is essentially applicable to all configurations in which two or more capacitor bodies are arranged side by side.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional capacitor, Figure 2 is a sectional view of the configuration that is the premise of this invention, Figure 3 is a sectional view showing an embodiment of this invention, and Figure 4 is the side of Figure 3. 5 is a side sectional view showing another embodiment of this invention. 1...Tank, 1A...Wall surface, 2-4...Capacitor body, 6...Heat conduction plate, 7...Space, 8...
...hole.

Claims (1)

[Scope of utility model registration request] In a capacitor device in which a plurality of capacitor bodies are arranged in parallel in a tank, the wall surface is arranged between the capacitor bodies so that the heat of the wall surface of the tank when heated for drying is conducted. a heat conduction plate whose edges are connected to the upper and lower ends of the heat conduction plate, and a flow section through which the insulating oil flows such that convection of the insulating oil occurs between the capacitor body at the upper and lower ends of the heat conduction plate. A capacitor device formed by