JPS5845254B2 - gas insulated busbar equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a gas insulated busbar device that reduces the influence of expansion and contraction due to temperature.

In recent years, gas insulated busbar devices have been in the spotlight.

As the gas insulated busbar unit becomes longer, it expands and contracts more due to temperature changes, so either a bellows is inserted in the middle to absorb the expansion or contraction, or one end of the busbar unit is made movable.

For this reason, there are disadvantages in that the space occupied increases and the structure becomes complicated.

This invention was made to eliminate the above drawbacks.
By setting the slopes of adjacent units of multiple connected gas insulated busbar units to opposite slopes,
A gas insulated busbar device capable of absorbing thermal expansion and contraction is provided.

The figures will be explained below.

In FIG. 1, reference numeral 1 denotes a tubular metal container, which is installed at an angle θ with respect to the horizontal line 2. As shown in FIG.

3 is a conductor disposed inside the container 1, and has contact portions 3a and 3 at both ends that can be connected to other conductors (not shown).
It has b.

Reference numeral 4 denotes an insulating spacer cast with epoxy resin or the like to support the conductor 3, and is fixed to the container 1.

Reference numeral 5 denotes a metal annular impurity suppression electrode having a plurality of holes 5a, and is fixed to the insulating spacer 4 at the same potential as the container 1.

Note that the above components 1, 3 to 5 constitute a gas insulated bus bar unit 6.

A gas insulated bus unit is constructed by connecting gas insulated bus units 6 similar to the above-described gas insulated bus unit 6 as shown in FIG.

That is, the adjacent gas insulated busbar units 7 are connected by welding between the containers so that the slope is opposite to that of the gas insulated busbar unit 6, and SF6 gas is sealed inside.

Of course, each contact portion 3a, 3b of the conductor 3 is joined to another adjacent contact portion (not shown).

With such a configuration, even if the gas insulated busbar units 6, 7 expand or contract due to temperature changes, for example, the expansion or contraction can be absorbed by the connecting portions between them.

Therefore, there is no problem even if both ends of the device are fixed.

According to this invention, among a plurality of connected gas insulated busbar units, one adjacent one has an upward slope and the other has a downward slope, so that it expands and contracts in the vertical direction, absorbs thermal expansion and contraction, and saves installation space. Ru.

Furthermore, since each unit can be connected by welding or the like while providing a predetermined slope, the structure becomes simple.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a gas insulated bus unit showing an embodiment of the present invention, and FIG. 2 is a front view showing a gas insulated bus unit in which the units shown in FIG. 1 are connected. In the figure, 1 is a container, and 6 and 7 are gas insulated busbar units. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Claims] 1. In a system in which a plurality of gas insulated bus units each containing a conductor are connected in a tubular metal container, one of the adjacent gas insulated bus units has an upward slope, and the other gas insulated bus unit has a downward slope. A gas insulated busbar device characterized by comprising: