JPH02903Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an arrangement structure for a bushing current transformer.

When a plurality of bushing current transformers are installed in a transformer, conventionally, as shown in FIG.
I'm trying to stack... Reference numeral 2A denotes an oil-submerged/submerged bushing, 3 a bushing connection chamber for an oil-immersed transformer, 4 a canopy for mounting the bushing, and a bushing pocket 6 between the canopy 4 and the current transformer receiving plate 5. Current transformers 1, 1... having the same outer diameter are coaxially stacked and arranged. 7 is a lead, and 8 is a reinforcing member.

FIG. 2 shows a conventional example of an oil-immersed transformer using a submerged-in-oil bushing 2B, and 9 is a bushing connection chamber.

In this way, conventionally, the current transformers 1, 1... have the same diameter and are stacked coaxially, so the required length of the bushing 2A and the required height of the bushing connection chamber 3 become large. As a result, the wall strength of the butching pocket 6 is reduced, and a large number of reinforcing members 8 must be installed to increase the seismic strength.
Another drawback is that the installation space for the transformer becomes large.

This idea was made to eliminate the above-mentioned drawbacks of the conventional technology, and by making the diameters of the bushing current transformers different and arranging them concentrically with respect to the bushings, the transformer The purpose of the present invention is to provide an arrangement structure for a bushing current transformer, which can simplify or eliminate the reinforcement structure of the bushing mounting part in a bushing, etc., and reduce the price of electrical equipment such as the above-mentioned transformer equipped with a bushing. do.

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 3, 10a, 10b, 10c and 10d are bushing current transformers;
b has an outer diameter smaller than the inner diameter of the current transformer 10a,
The inner diameter of the current transformer 10d is larger than the outer diameter of the current transformer 10c, and the current transformer 10d has an outer diameter smaller than the inner diameter of the current transformer 10c. It is arranged between the receiving plate 5 and the receiving plate 5.

In this embodiment, the height occupied by the current transformers 10a to 10d is only that of the current transformer 10a, and the height of the first
The reinforcing member 8 shown in Figs. and 2 becomes unnecessary.

FIG. 4 shows an embodiment of this invention in which the bushing is an oil-in/oil-penetrating bushing 2B.

FIG. 5 shows still another embodiment of this invention, in which bushing current transformers 11a and 12a and bushing current transformers 11b and 12b have the same diameter, respectively, and the bushing current transformers 11a and 12a have the same diameter as the bushing current transformers 11a and 12a. The diameter of the current transformers 11b and 12b is larger than that of the current transformers 11b and 12b, and the arrangement is a folded arrangement of coaxial arrangement and concentric arrangement.

As described above, according to this invention, by arranging multiple bushing current transformers concentrically, the required length of bushings and the height of the bushing connection chamber of electrical equipment such as transformers can be made smaller than in the past. Therefore, the reinforcement structure for the bushing mounting part can be simpler or unnecessary than before, and the required overall height of the electrical equipment can be lowered.
Since the bushing can also be made shorter than before, the price of electrical equipment equipped with bushings can be made cheaper than before.

[Brief explanation of the drawing]

1 and 2 are front sectional views showing the conventional arrangement structure of a bushing current transformer, FIG. 3 is a front sectional view of an embodiment of the bushing current transformer according to this invention, and FIGS. 4 and 5. is a front sectional view of another embodiment of this invention. In the figure, 2A, 2B... Bushing, 10
a, 11a, 12a... Bushing current transformer, 5...
...Current transformer receiving plate, 10b, 11b, 12b... Bushing current transformer. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In the case where there are a plurality of bushing current transformers that the bushing passes through, at least some of the bushing current transformers have different diameters, and are arranged concentrically with respect to the bushing. Arrangement structure of bushing current transformer.