JPH05234773A - Transformer unit - Google Patents

Abstract

PURPOSE:To acquire a compact and highly reliable transformer unit by providing a switch whose one connecting conductor is connected to a first bushing provided to a gas insulating container and a transformation part wherein the other connecting terminal is connected to a second bushing of the gas insulating container. CONSTITUTION:A transformer unit is provided with a vacuum switch 10 and a transformation part 3 inside a gas insulating container 13 wherein insulating gas is sealed. A second bushing 9 for output to a low tension circuit is provided to an upper part of the transformer unit together with a first bushing 8 for high tension circuit lead-in connection. A high tension lead-in wire of a main circuit of the transformer unit is connected to the vacuum switch 10 through the first bushing 8 and connection is made to be directly input to the transformation part 3 through a connection wiring. A secondary terminal of the transformation part 3 is electrically connected to a low tension circuit through the second bushing 9. According to this constitution, it is possible to greatly reduce the number of components and to acquire a compact and highly reliable transformer unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer device that opens and closes an electric circuit and transforms it.

[0002]

2. Description of the Related Art FIG. 6 is a side view showing a partially cutaway view of a conventional substation disclosed in, for example, Japanese Utility Model Laid-Open No. 2-12550. As shown in FIG. 6, this substation device has a structure in which the switch container 5 of the high-voltage switch 2 is placed on the transformer container 14 of the gas-insulated transformer 1. The high-voltage switch 2 has a first through bushing 7a provided on the upper part of the switch container 5 for connecting the high-voltage service line of the main circuit, and an electrical connection to the high-voltage circuit of the main circuit via the first through bushing 7a. A switch body 4 having a primary side terminal 4a that is electrically connected, and a switch container 5 and a transformer container 14 that penetrate the switch body 4
A second through bushing 6a for electrically connecting the secondary terminal 4b to the gas insulation transformer 1 is provided. Insulating gas is filled in the transformer container 14 of the gas-insulated transformer 1 on which the high-voltage switch 2 is mounted in order to enhance insulation performance and heat conduction performance. Inside the transformer container 14 in which an insulating gas is sealed, a transformer body 30 composed of a coil 30a and an iron core 30b is arranged.
The secondary terminal 4b is electrically connected to this coil 30a. FIG. 7 shows a single-wire connection diagram of the conventional substation device configured as described above. As shown in FIG. 7, in the conventional substation, the high-voltage service wire of the main circuit is connected to the switch body 4 via the first through bushing 7a, and the switch body 4 transfers to the transformer body 30. Are connected via a second through bushing 6a. The output from the transformer body 30 is arranged in parallel behind the first through bushing 3b and the third through bushing 6b arranged in parallel behind the second through bushing 6a in FIG. It is configured to be brought to a low-voltage circuit outside the device via the fourth through bushing 7b that is formed.

[0003]

In the conventional substation, the gas-insulated transformer 1 and the high-voltage switch 2 are independent and separate from each other so that they are not affected by the arc and high heat generated when the high-voltage switch 2 is cut off. Had to be constructed from the containers 5,14 of. For this reason, a plurality of through bushings 6a, 6 are provided at the portion where the high voltage service line of the main circuit penetrates each container.
b, 7a, 7b are provided, and each through bushing 6a, 6b, 7b
There has been a problem that the device becomes large in size because connection wiring or the like must be provided to connect a and 7b. Further, the internal equipment of the gas-insulated transformer 1 and the internal equipment of the high-voltage switch 2 are arranged in different environments, that is, the transformer container.
Reference numeral 14 is an airtight container in which an insulating gas is sealed, but since the switch container 5 is an open container having a ventilation port, etc., an insulator inside the high-voltage switch 2 due to dust or moisture in the atmosphere around the device. However, there is a problem that the insulation performance is deteriorated due to the contamination of the above, and the reliability of the entire substation device is lacking. The present invention has been made to solve the above problems, and an object thereof is to obtain a small and highly reliable substation device.

[0004]

SUMMARY OF THE INVENTION A substation apparatus according to the present invention is a gas insulated container filled with an insulating gas filled with an insulating gas, and a hermetic arc extinguishing disposed inside the gas insulated container. A switch having a chamber, in which one connecting conductor of the switch is connected to a first bushing provided in the gas insulated container, and a transformer arranged inside the gas insulated container. Part of the coil of the transformer, the one connection terminal of the coil is electrically connected to the other connection conductor of the switch, the other connection terminal of the coil of the transformer is the first of the gas-insulated container. And a transformer connected to the two bushings.

[0005]

The substation device according to the present invention is a vacuum switch having a closed arc-extinguishing chamber at an internal protrusion of a first bushing for connecting a high-voltage circuit service wire provided in a gas-insulated container in which an insulating gas is sealed. Is directly connected to the secondary side terminal of the vacuum switch and the coil of the transformer section disposed inside the gas insulation container to electrically connect the primary side terminal to the first bushing and The voltage of the high-voltage circuit input via the vacuum switch is transformed into a desired voltage value and output via the second bushing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the transformer device of the present invention will be described below with reference to the drawings. 1 is a front view showing a substation apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged view showing a part of the inside of the substation apparatus shown in FIG. 1, and FIG. FIG. 4 is a side view showing an enlarged part, FIG. 4 is a side view of the substation apparatus of FIG. 1, and FIG. 5 is a single wire connection diagram of the substation apparatus of FIG. As shown in FIGS. 1 and 2, in the substation of this embodiment, a vacuum switch 10 and a transformer 3 are provided inside a gas insulating container 13 in which an insulating gas is filled. A first bushing 8 is provided at an upper part of the gas insulating container 13 so as to penetrate the ceiling plate, and a vacuum opening / closing having a closed arc-extinguishing chamber is provided at an end of an internal protruding portion of the first bushing 8. Bowl 10
The fixed-side conductor is electrically connected via the connection conductor 8a. The primary side terminal 15 of the coil 3a of the transformer 3 is electrically connected to the movable side conductor of the vacuum switch 10. Also,
The movable conductor of the vacuum switch 10 is an insulating support for the opening / closing drive section.
It is configured to be driven by 11. FIG. 3 shows the connection between the insulating support 11 and the drive shaft 12a. Figure 3
Shows the vicinity of the insulating support 11 of the substation shown in FIG.
It is the figure seen from the right side surface direction. Insulating support 11 is the drive shaft
It is connected to 12a, and the rotation of the drive shaft 12a causes the insulating support 11 to move in the vertical direction to open and close the vacuum switch 10. The drive shaft 12a is configured to be connected to the operation display unit 12 (FIG. 1) attached to the outer surface of the gas insulation container 13. Therefore, the drive shaft 12a is rotated by the operation of the operation display unit 12 to move the insulating support 11 upward or downward, so that the vacuum switch 10 is closed or opened.

FIG. 4 is a left side view of the substation shown in FIG. As shown in FIG. 4, the first bushing 8 for connecting the high-voltage circuit service line and the second bushing 9 for outputting to the low-voltage circuit are provided on the upper portion of the transformer.
Is provided. The second bushing 9 is provided to electrically connect the secondary side terminal of the coil 3a of the transformer 3 to a low voltage circuit outside the device. FIG. 5 shows a single wire connection diagram of the substation apparatus of this embodiment configured as described above. As shown in FIG. 5, the high voltage service wire of the main circuit of this transformer is connected to the vacuum switch 10 via the first bushing 8 and directly input to the transformer 3 via the connection wiring. Is connected as follows. In addition, 2 of transformer section 3
The secondary terminal is electrically connected to the low voltage circuit via the second bushing 9. In the above embodiment, the high-voltage switch part was constituted by a vacuum switch, but another switch having a closed arc-extinguishing chamber, for example, a gas switch in which an insulating gas is filled, constitutes the high-voltage switch. Even if it does, the same effect as the said Example is produced.

[0008]

As described above, according to the present invention, the high-voltage switch section having the closed arc-extinguishing chamber and the transformer section are arranged inside one gas-insulated container, so that the constituent parts can be constructed. It is possible to obtain an inexpensive and small substation because it can be significantly reduced, and because the switch and the transformer section are housed in a clean environment in the same insulating gas container, the insulator etc. in the insulating gas container This is effective in obtaining a highly reliable substation device which is not polluted.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a substation device of the present invention.

FIG. 2 is an enlarged view showing a part of the inside of the substation shown in FIG.

FIG. 3 is an enlarged side view of a part of an opening / closing drive section of the substation device of FIG.

FIG. 4 is a side view of the transformer device of FIG.

5 is a single wire connection diagram of the substation device of FIG.

FIG. 6 is a side view showing a conventional substation with a part cut away.

FIG. 7 is a single wire connection diagram of the conventional substation device of FIG.

[Explanation of symbols]

 3 Transformer Part 3a Coil 8 First Bushing 9 Second Bushing 10 Vacuum Switch 13 Gas Insulated Container

Claims (1)

[Claims] 1. A gas-insulated container in which an insulating gas is sealed, a switch having a hermetic arc-extinguishing chamber disposed inside the gas-insulated container, wherein one connection conductor of the switch is A switch connected to a first bushing provided in the gas-insulated container, a transformer section disposed inside the gas-insulated container,
One connection terminal of the coil of the transformer is electrically connected to the other connection conductor of the switch, and the other connection terminal of the coil of the transformer is connected to the second bushing of the gas insulated container. The transformer device, comprising: