JPH0811015Y2 - Gas insulated switchgear - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear (hereinafter referred to as GIS), and more particularly, to an improvement in a connection structure with a power supply / demand instrument transformer (hereinafter referred to as MOF).

[0002]

2. Description of the Related Art Conventionally, in a GIS to which MOF is applied, a power source side unit 1 and a load side unit 2 are arranged with their bushings 1a and 2a facing each other as shown in FIG. An oil-insulated MOF3 is installed between the units 1 and 2, and a copper wire 4 is provided between the power-side bushing 3K of the MOF3 and the bushing 1a of the power-side unit 1 and between the load-side bushing 3L of the MOF3 and the bushing 2a of the load-side unit 2, respectively. And 5 are connected in the atmosphere.

However, in the GIS having such a structure, since the connection with the MOF 3 is the connection in the atmosphere by the bushing, there is a problem that the installation space becomes very large. Therefore, the MOF is connected by the gas pipeline. A direct connection method with GIS is desired. By the way, FIG. 6 shows a single-line connection configuration of the two-line regular / standby power receiving 2MOF GIS, and FIGS. 7 and 8 show the external configuration thereof.

On each of the regular side and the spare side, a circuit breaker unit 6 serving as a power source side unit is formed by accommodating the disconnecting switch DS1, the circuit breaker CB, the grounding switches ES1 and ES2 and the instrument current transformer CT. , Disconnector DS2, DS3
Transformer connection unit 7 that houses the load and becomes the load side unit
And connecting both units 6 and 7 directly with the connecting pipe line 8,
The gas-insulated MOF 9 arranged immediately below this is connected to the connection conduit 8 using the connection container 10, and the normal side and the spare side are arranged back to back. Tr is a transformer.

The gas-insulated MOF 9 is shown in FIGS. 9 and 10.
As shown in FIG. 2, the gas monitoring box 12 and the secondary terminal box 13 are arranged on the left and right of the front surface of the MOF main body 11, respectively, while M
Three-phase (U, V, W) bushings 14UK, 14UL, 14V, 14WK, 14WL are arranged in the front-rear direction on the upper surface of the OF body 11, and the bushing 14U on the power supply side is arranged.
K, 14WK on the right side, load side bushing 14UL,
The 14 WLs are arranged on the left side so that the power source side and the load side are directional.

Here, in the GIS shown in FIG. 7, when the normal side is viewed from the front, the right side of the MOF 9 is the power supply side (circuit breaker unit 6 side) and the left side is the load side (transformer connection unit 7 side). However, when the spare side is viewed from the front, the left side of the MOF 9 is the power supply side and the right side is the load side. On the other hand, MOF9
As mentioned above, the right side when viewed from the front is the power supply side,
The left side is the load side, and when this is applied to GIS, MO
The front of F9 must match the front of GIS.

Therefore, on the regular side of GIS, M
When the front of OF9 is matched with the front of GIS, MOF9
Of the power supply side and load side of the GIS and the power supply side and load side of the GIS coincide with each other, and the units 6, 7 and the MO in the connection pipeline 8 are connected.
Each connection with F9 can be done easily, but GIS
On the spare side, when the front side of MOF9 is made to coincide with the front side of GIS, the directions of the power supply side and the load side of MOF9 and GIS are reversed, so that both units 6, 7 and MOF9 are connected. Becomes very difficult, the connection structure becomes complicated, and the cost becomes expensive.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to provide an MOF having a power source side terminal and a load side terminal on both sides.
When connecting between the power supply side unit and the load side unit, it is possible to easily connect the power supply side unit and the load side unit with respect to the MOF power supply side and the load side with a simple structure regardless of the direction. It is to provide a GIS capable of performing.

[0009]

In order to achieve the above object, in the GIS of the present invention, a pipe-shaped outer conductor and both ends of the outer conductor are inserted through an insulating collar from the outer conductor. The derived internal conductor is provided, and the power supply side unit and the power supply side terminal of the MOF and the load side unit and the load side terminal of the MOF are connected by both conductors.

[0010]

In the above-mentioned structure, when the power supply side terminal and the load side terminal arranged on both sides of the MOF are connected to one end of each of the inner conductor and the outer conductor, the power supply side unit and the load side unit are respectively connected. It is connected to the other end of each of the inner conductor and the outer conductor, but at each end of both conductors, there is no directivity in the connection direction, so both units are in any position with respect to the MOF. The directions can be easily adjusted by simply changing the connecting direction at the end of the inner conductor and the connecting position at the end peripheral surface of the outer conductor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. This embodiment is applied to the two-line normal / standby power receiving 2MOF GIS shown in FIGS. 6 to 8. FIGS. 1 to 4 are circuit breaker unit 6 serving as a power supply side unit and load side. It shows the details of the connecting portion between the transformer connection unit 7 and the gas-insulated MOF 9 as a unit.

First, FIG. 1 shows a connecting line 8 on the service side.
15 is an inner view of the inner side of the normal side, 15 is an outer conductor made of copper pipes arranged vertically, 16 is inserted through the insulating collar 17 inside the outer conductor 15, and both ends are outside. It is an inner conductor made of a copper round bar led out from the conductor 15, and the two units 15 and 16 connect between the units 6 and 7 and the MOF 9.

That is, in the W phase of the MOF 9, the linear conductor 18 connected to the bushing 14WK on the power source side.
Is connected to the lower end of the inner conductor 16 disposed between the bushings 14WK and 14WL, and the L-shaped conductor 19 connected to the load-side bushing 14WL is connected to the lower end peripheral surface of the outer conductor 15. A linear conductor 21 is connected to the conductor 20 from the circuit breaker unit 6 by a fixing bolt 22, the conductor 21 is connected to the upper end of the inner conductor 16, and an L-shaped conductor 23 is connected to the transformer connection unit 7. Are connected to each other by fixing bolts 25, which are connected to the upper peripheral surface of the outer conductor 15.

Here, in the upper part of the outer conductor 15,
Tap holes are formed at both positions so that the conductor 24 can be attached to either the left or right side, and the conductor 24 is attached to the left tap hole in FIG. In addition, 26 is each conductor 18, 19, 20, 21, 21 formed by processing a copper bus bar.
It is a shield that covers the respective ends of 3, 24.

Further, FIG. 3 shows a connecting portion in the V phase of the MOF 9, and since this phase is used only for voltage detection, a bushing is formed on the conductor 27 connecting between both units 6 and 7. 14V is connected using conductor 28. The U phase of MOF 9 has the same connection configuration as the W phase.

Next, FIG. 4 shows the inside of the connecting pipe 8 on the spare side as seen from the front side of the spare side. In this case,
Since the transformer connection unit 7 and the circuit breaker unit 6 are located on the power supply side and the load side of the MOF 9, respectively, the connection directions of the outer conductor 15 and the inner conductor 16 are different from those on the regular side.

That is, in the W phase of the MOF 9, the bushing 14WK on the power supply side is connected to the lower end of the internal conductor 16 via the linear conductor 18, and the bushing 14W on the load side.
The point where L is connected to the lower end peripheral surface of the outer conductor 15 via the L-shaped conductor 19 is the same as the regular side, but the circuit breaker unit 6
20 is introduced from the left side in the figure, is connected to the upper end of the inner conductor 16 via the linear conductor 21, and the conductor 23 from the transformer connection unit 7 is introduced from the right side in the figure, which is L It is connected to the right side of the upper end peripheral surface of the outer conductor 15 via the shaped conductor 24.

That is, both units 6 for the MOF 9 are
Although the positional relationship of 7 is completely opposite to the normal side, the same parts as the normal side such as the outer conductor 15 and the inner conductor 16 are used, and the connecting positions of the conductors 21 and 24 are simply changed left and right.
The power supply side and the load side of the MOF 9 can be connected in the direction of the circuit breaker unit 6 and the transformer connection unit 7, respectively, and as a result, the front side of the GIS and the front side of the MOF 9 on the normal side and the spare side respectively. It is possible to match.

[0019]

Since the present invention is constructed as described above, it has the following effects. Since the power-side unit and the load-side unit are connected to the MOF power-side terminal and the load-side terminal respectively by using the pipe-shaped outer conductor and the inner conductor inserted inside the pipe-shaped outer conductor, both units or both ends are connected. The energization path can be reversed by simply changing the connection position for both conductors of the child, and the MOF having directionality on the power supply side and the load side can be easily connected to the power supply side unit and the load side unit in the same direction. Moreover, the connection direction can be freely changed with a simple structure of the outer conductor and the inner conductor, and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a cutaway front view of a main part on a service line side showing an embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a plan view taken along line XY of FIG.

FIG. 3 is another cutaway front view of the working line side according to the first embodiment.

FIG. 4 is a cutaway rear view of the main part on the protection line side of the first embodiment.

FIG. 5 is a front view of a conventional example.

FIG. 6 is a single line connection diagram of a general GIS.

FIG. 7 is a plan view of the GIS of FIG.

FIG. 8 is a front view of the GIS of FIG.

FIG. 9 is a front view of a gas-insulated MOF.

FIG. 10 is a plan view of FIG.

[Explanation of symbols]

 6 Circuit breaker unit 7 Transformer connection unit 9 Gas insulation MOF 14UK, 14WK Power supply side bushing 14UL, 14WL Load side bushing 15 Outer conductor 16 Inner conductor 17 Insulation collar

Claims (1)

[Scope of utility model registration request] 1. A gas-insulated switchgear comprising a power supply-side unit and a load-side unit, a gas insulated switchgear in which a power supply / demand instrument transformer having a power supply-side terminal and a load-side terminal disposed on both sides is connected. An outer conductor and an inner conductor which is inserted through an insulating collar inside the outer conductor and has both ends led out from the outer conductor are provided, and the power supply side unit and the power supply side terminal are provided, and the load side unit and the load are provided. A gas-insulated switchgear characterized in that the side terminals are connected by the conductors.