JPH1189020A - Gas insulation switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the dimensions of a unit in depth for reduced installation area, by disposing the same one of three phases of the first bus and the second bus together so as to install a bus tank at the bottom part of a housing. SOLUTION: A V-phase in one of U-, V-, and W-phase of the first bus 12 and the second bus 5 is connected to a unit which stores a measuring instrument through a single bus. A bus tank 7 is disposed in the middle of the lower part of a housing 15, and the buses 12, 5 are arranged inside the bus tank 7 so as to be disposed concentratedly. A conductor for connecting between apparatuses is disposed in the perpendicular direction. It is thus possible to shorten the length of the housing 15 in the depth direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear, and has a reduced unit installation area.

[0002]

2. Description of the Related Art A gas-insulated switchgear for receiving power, comprising:
The 2/84 KV class device has the following configuration. First, the configuration of the single-line diagram is shown in FIG. In the figure, ES is a grounding switch, VCB is a vacuum circuit breaker, DS is a disconnecting switch, MOF is a transformer for current transformer, LA is an arrester, CH
D is a cable head, CT is a current transformer, and Tr is a transformer. Each of these devices is divided into units A, B, and C,
Each device is accommodated in the housing for each unit arranged as shown in FIG.

FIGS. 11, 12, and 13 show the structures of units A, B, and C when viewed from the direction of arrow P in FIG. As shown in FIG. 11, the unit A is provided with an equipment tank 1 and a bus bar tank 2, and inside the equipment tank 1, a conductor 3 for connecting an external transformer Tr and an internal grounding switch ES is provided. , Vacuum circuit breaker VCB and disconnector DS in busbar tank 2
And a conductor 4 for connecting the
The bus 5 is accommodated therein.

[0006] Next, as shown in FIG. 12, the unit B is provided with an equipment tank 6 and bus tanks 7 and 8, and the bus 5 is accommodated in the bus tank 8. Equipment tank 6
Inside, a conductor 9 connecting the cable head CHD and the earthing switch ES, a conductor 10 connecting the earthing switch ES and the vacuum circuit breaker VCB, a vacuum circuit breaker VCB and the busbar tank 7
And a conductor 11 for connecting to the disconnecting switch DS in the inside. A bus 12 is accommodated in the bus tank 7.

[0005] Finally, the unit C houses an instrument transformer / current transformer MOF as shown in FIG. As shown in FIG. 14, conductors 5 and 12 are connected to both sides of the instrument transformer / current transformer MOF, respectively.

[0006]

However, FIG. 11 and FIG.
2, the conductors are arranged only in the upper part of the unit, so that the conductors are arranged in the depth direction which is the horizontal direction in FIGS. 11 and 12, and the arrangement of the conductors 3, 4 or the conductors 9 to 11 is substantially U-shaped. And the unit becomes longer in the depth direction. Therefore, the installation area of the gas insulated switchgear needs to be large.

Therefore, an object of the present invention is to provide a gas insulated switchgear which solves the above problem.

[0008]

According to a first aspect of the present invention, there is provided a gas insulated switchgear comprising: a first and a second unit accommodating an instrument transformer; A second unit connected to the current transformer via a first bus for three phases is disposed, and a third unit separately connected to the instrument transformer for current through a second bus for three phases. In the gas insulated switchgear respectively arranged outside the second unit, characterized in that the first bus and the second bus are arranged together in the same phase of the three phases,
The configuration of the gas insulated switchgear according to claim 2 is characterized in that the same phase in the first bus and the second bus have a coaxial structure, and an insulating member is interposed between the two.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In this embodiment, since a part of the conventional gas insulated switchgear is improved, the same parts as those of the prior art are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.

(A) Embodiment 1 FIGS. 1 to 6 show the configuration of a gas insulated switchgear according to the present invention. As shown in FIG. 1, the gas insulated switchgear is constituted by units A to C arranged in the same manner as in the prior art. The connection diagram of the first embodiment is as shown in FIG. This connection diagram is a connection diagram for three phases.
FIG. 7 shows a conventional connection diagram for three phases. As can be seen by comparing FIGS. 6 and 7, units B and A are conventionally individually connected to unit C via first and second buses 12 and 5 of three phases U, V and W, respectively. Of the V phase, both buses are directly connected. For this reason, in the present invention, the first bus 12 and the second bus 5 are collectively arranged for each of the U, V, and W phases, and the units A and B are connected to the unit C via a single bus for the V phase. It is connected.

As can be seen from a comparison between the conventional unit A shown in FIG. 11 and the unit A shown in FIG.
The bus tank 2 is moved from the left end of the upper part of the housing 15 to the center of the lowermost part, and the disconnector DS in the bus tank 2 and the earthing switch ES in the equipment tank 1 are connected via the conductor 4 and vacuum. Circuit breaker VCB is installed long in the vertical direction. For this reason, the length of the housing 15 in the depth direction, which is the length in the left-right direction in FIG. 2, is shorter than that of the conventional unit A.

Next, in the unit B, FIG. 3 shows the buses 12 and 5, which were individually housed in the bus tank 7 and the bus tank 8, which were conventionally arranged on the upper part of the housing 15 as shown in FIG. As shown, a cable head CH arranged collectively in the bus bar tank 7 arranged at the bottom and arranged at the upper left of the housing 15
D and the bus 12 are connected via conductors 9, 10 and 11.

Next, the unit C is configured as shown in FIG. 4, and as shown in FIG. 5, the unit C houses a holder 13 for mounting the measuring transformer / current transformer MOF in the housing 15. You. Holes 14 for leading out the busbars 5 and 12 are provided on the left and right of the lower part corresponding to the busbar tank 7 in the holder 13.
Are formed.

In such a gas insulated switchgear, as shown in FIG. 3, the bus tank 7 is arranged in the lower center of the housing 15 and the buses 12 and 5 are collectively arranged in the bus tank 7. They are not arranged side by side in the depth direction as in the prior art shown. For this reason, by arranging the conductors for connecting the devices in the vertical direction, the length in the depth direction of the housing 15, which is the left-right direction in the figure, is reduced. Moreover, the height in the vertical direction is substantially the same as the conventional height, and there is no problem.

The vacuum circuit breaker V of the unit A or the unit B
When an abnormality occurs in the CB, the insulating gas inside the equipment tank 1 or the equipment tank 6 is extracted, and then the equipment tank 1 or the equipment tank 6 is removed from the bus tank 2 or the bus tank 7.
Is disconnected, and is taken out of the housing 15 to repair or replace the vacuum circuit breaker VCB. After that, install the equipment tank in the reverse order.

(B) Second Embodiment Next, a second embodiment of the gas insulated switchgear according to the present invention will be described. This embodiment is different from the first embodiment shown in FIGS. 1 and 6 in that the positions of the units A and B are interchanged and only the bus 12 is accommodated in the bus chamber 7, while both the buses 5 and 12 are accommodated in the bus chamber 2. It is what contained.

The other constructions and operations of the gas insulated switchgear are substantially the same as those of the first embodiment, and a description thereof will be omitted.

(C) Third Embodiment Next, a third embodiment of the gas insulated switchgear according to the present invention will be described. This embodiment is different from the first and second embodiments in FIG.
The first bus bar 12, W _K of the second busbar 5, W _L and U _K, is obtained by integrating the U _L. For example W _K, the W _L to coaxial structure as shown in FIG. 8, the insulation therebetween member 16
Is interposed.

[0019]

As can be seen from the above description, claim 1
According to the gas insulated switchgear according to the above, the positions of the bus tanks in each unit are summarized at the bottom of the housing,
The depth dimension of the unit can be made smaller than before, and the installation area of the gas insulated switchgear can be made smaller, and the height dimension does not become higher than before. Further, since it is not necessary to provide two busbar tanks in one unit as in the conventional case, not only the number of parts can be reduced, but also the cost can be reduced by reducing the number of gas monitoring sections.

According to the gas insulated switchgear according to the second aspect, since the distance between each phase in the first and second buses is small, the capacity of the bus tank can be reduced and the gas insulated switchgear can be downsized. Then, since the electromagnetic force acting between the conductors is reduced, it is possible to design with reduced mechanical strength, leading to cost reduction.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing Embodiment 1 of a gas insulated switchgear according to the present invention.

FIG. 2 is a configuration diagram of a unit A according to the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 3 is a configuration diagram of a unit B according to the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 4 is a configuration diagram of a unit C according to the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 5 is a perspective view showing an internal structure of a unit C according to the first embodiment of the gas insulated switchgear according to the present invention.

FIG. 6 shows first to third embodiments of the gas insulated switchgear according to the present invention.
FIG.

FIG. 7 is a three-phase connection diagram of a conventional gas-insulated switchgear.

FIG. 8 is a perspective view showing the structure of a bus in a third embodiment of the gas insulated switchgear according to the present invention.

FIG. 9 is a single-line diagram of a conventional gas-insulated switchgear.

FIG. 10 is an external perspective view of a conventional gas insulated switchgear.

FIG. 11 shows a unit A according to a conventional gas insulated switchgear.
FIG.

FIG. 12 relates to a conventional gas insulated switchgear, which is a unit B
FIG.

FIG. 13 relates to a conventional gas insulated switchgear, and shows a unit C
FIG.

FIG. 14 relates to a conventional gas insulated switchgear, and shows a unit C
The perspective view which shows the internal structure of FIG.

[Explanation of symbols]

 2, 7 ... bus tank 12 ... first bus 5 ... second bus 16 ... insulating member A, B, C ... unit MOF ... instrument transformer

Claims (2)

[Claims] Claims: 1. A second unit connected to a three-phase first bus of the current transformer is arranged on both sides of the first unit accommodating the voltage transformer. In a gas insulated switchgear in which third units that are separately connected to three-phase buses for an instrument-use current transformer are arranged outside the second unit, the first bus and the second bus And a gas insulated switchgear, wherein the same phase of the three phases is arranged together. 2. The gas insulated switchgear according to claim 1, wherein the same phase in the first bus and the second bus have a coaxial structure, and an insulating member is interposed between the two.