JPH10178712A - Aligned panel type gas-insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the distance between each current transformer and a zero-phase current transformer by giving an elliptical shape having an elliptic insertion hole to the zero-phase current transformer and inserting a three-phase power cable in one united body to the insertion hole without bending. SOLUTION: A zero-phase current transformer 11 has an elliptical shape or a so-called track shape, in which an elliptic insertion hole 12 is formed, and is attached to an attaching plate 13 as the same as that of the current transformer 8 of each phase located above in the panel of a unit 1. And a power cable 7 from each cable head 6 is inserted to each current transformer 8 respectively, three power cables 7 are inserted to the insertion hole 12 of the zero-phase current transformer 11 in one united body without being bent and are led out upward. By doing this, it is not necessary to bend the power cables 7 at both sides and thus the distance between each current transformer 8 and the zero-phase current transformer 11 can be shortened and the zero-phase current transformer 11 can be housed within the panel of the unit 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a row type gas insulated switchgear having a plurality of cubicle type gas insulated switchgear units arranged side by side.

[0002]

2. Description of the Related Art A conventional apparatus of this type will be described with reference to FIG. In the figure, A is a front view, B is a left side view, C is a rear view in which doors of units on both sides are removed, and D is a perspective view of a zero-phase current transformer of C.

In FIG. 1, reference numeral 1 denotes a cubicle-type gas insulated switchgear unit, and a plurality of units 1 are arranged side by side to constitute a row type gas insulated switchgear. 2,
Reference numeral 3 denotes a front door and a rear door of the unit 1, 4 denotes a decorative side plate mounted on a side surface of the unit 1 on both sides, and 5 denotes a zero-phase current transformer mounting box protruded from the upper surface of the unit 1 on both sides.

[0006] Reference numeral 6 denotes a three-phase cable head arranged side by side at the lower part of the unit 1 on both sides.
, Power transformers 8 connected to the left and right above the respective heads 6 and current transformers for each phase mounted at three places above the heads 6, 9 mounted to the mounting box 5, circular insertion Hole 1
It is a zero-phase current transformer in which 0 is formed.

[0005] The cable 7 from each head 6 is
After passing through each current transformer 8, the insertion hole 10 of the zero-phase current transformer 9
, And are led upward.

[0006]

In the case of the above-mentioned conventional device, since the cable 7 has a restriction on the bending radius, the cables 7 on both sides cannot be bent greatly, and the zero-phase current transformer 9 is mounted on the unit 1 panel. A separate zero-phase current transformer mounting box 5 protruding from the upper surface of the unit 1 must be mounted only on the unit 1 to which the zero-phase current transformer 9 cannot be housed.

[0007] Therefore, the aesthetic appearance of the train is impaired, and
Unit 1 due to height restrictions during shipping, transportation and loading
The mounting box 5 for mounting the zero-phase current transformer must be removed from the box and packed separately, which causes a problem that handling is extremely complicated. The present invention, in consideration of the above points, enables the zero-phase current transformer to be housed in the panel of the unit without separately providing a box for mounting the zero-phase current transformer, improving the appearance, and An object of the present invention is to provide a row type gas insulated switchgear which is easy to handle.

[0008]

In order to solve the above-mentioned problems, a row type gas insulated switchgear according to the present invention comprises a row type gas insulated switchgear having a plurality of cubicle type gas insulated switchgear units. , A three-phase cable head arranged in a horizontal direction at a lower position in at least one of the units, and a current transformer for each phase which is located above each of the heads and attached to a mounting plate. An elliptical zero-phase current transformer, which is located above the current transformers, is attached to the mounting plate, and has an oval insertion hole, penetrates each of the current transformers, and , And power cables from each of the heads, which pass through the zero-phase current transformer.

Therefore, since the zero-phase current transformer is formed into an elliptical shape having an oblong insertion hole, the three-phase power cable can be collectively penetrated into the oblong insertion hole with almost no bending. The distance between each current transformer and the zero-phase current transformer can be reduced, and the zero-phase current transformer can be housed in the panel of the unit.

[0010] Therefore, there is no loss of aesthetic appearance as a train, and there is no height restriction during shipping, transportation, and loading.
Handling is extremely easy without separate packaging.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. A of the figure is a front view, B is a left side view,
C is a rear view in which the doors of some units have been removed, and D is a perspective view of the zero-phase current transformer of C. In FIG. 2, the same reference numerals as those in FIG. The differences are as follows.

A zero-phase current transformer 11 is mounted at an upper position in the panel of the unit 1, and the zero-phase current transformer 11 has an elliptical shape in which an oblong insertion hole 12 is formed, that is, a so-called track shape. The power cable 7 from each cable head 6 is attached to the same mounting plate 13 as the current transformer 8 of each phase located immediately below the power transformer 8, and hardly bent after passing through each current transformer 8. The three cables 7 collectively pass through the insertion hole 12 of the zero-phase current transformer 11 and are led upward.

Since there is no need to bend the cables 7 on both sides, the distance between each current transformer 8 and the zero-phase current transformer 11 can be reduced, and the zero-phase current transformer 11 can be mounted inside the unit 1 panel. It becomes possible to store.

[0014]

Since the present invention is configured as described above, it has the following effects. Since the zero-phase current transformer 11 is formed into an elliptical shape in which the oblong insertion hole 12 is formed, the three-phase power cables 7 can be passed through the insertion hole 12 at a time with almost no bending, and the zero-phase current Vessel 1
1 can be accommodated in the panel of the unit 1, and there is no need to provide a conventional zero-phase current transformer mounting box above the unit 1 as in the prior art, and the appearance of the row panel can be improved.

Further, when shipping, transporting, carrying in, etc.,
Since it has the same shape as the other units 1, there is no height limitation, it is extremely easy to handle without separate packing, and the work efficiency is improved.

In addition, near each current transformer 8, a zero-phase current transformer 1 is provided.
1 can be provided, the zero-phase current transformer 11 can be mounted on the same mounting plate 13 as the mounting plate 13 of each current transformer 8, and the number of components can be reduced.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, wherein A is a front view, and B is
Is a left side view, C is a rear view in which doors of some units are removed, and D is a perspective view of the zero-phase current transformer of C.

FIG. 2 shows a conventional example, wherein A is a front view, B is a left side view, and C
FIG. 3 is a rear view of a unit with a door removed, and FIG. 4D is a perspective view of a zero-phase current transformer C.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas-insulated switchgear unit 6 Cable head 7 Power cable 8 Current transformer 11 Zero-phase current transformer 12 Insertion hole 13 Mounting plate

Claims (1)

[Claims] 1. A row-panel type gas insulated switchgear having a plurality of cubicle type gas insulated switchgear units arranged side by side, wherein at least one of said units has three phases arranged in a horizontal direction at a lower position. And a current transformer for each phase, which is located above each of the heads and is attached to a mounting plate, and which is located above each of the current transformers, which is attached to the mounting plate, and has an oblong shape. An elliptical zero-phase current transformer having an insertion hole; and a power cable from each of the heads, which penetrates each of the current transformers and collectively penetrates the zero-phase current transformer. Features a disk-type gas-insulated switchgear.