KR100928933B1 - Voltage transformer connection device for solid insulated load breaker and solid insulated load breaker - Google Patents

Abstract

In order to provide a voltage transformer connection device for a connection device between a bus bar and a voltage transformer having a high space efficiency and a simple structure in a solid insulated load switch, it has an electrical conductor part and an insulation part incorporating the conductor part. And a connector having a vertical and horizontal length connected to the transformer for supplying power from the nirvana bus portion and having a vertical and horizontal length determined according to the vertical and horizontal distances of the voltage transformer and the nirvana bus portion.

Description

SOLID INSULATED LOAD BREAK SWITCHGEAR AND POTENTIAL TRANSFORMER CONNECTOR FOR SOLID INSULATED LOAD BREAK SWITCHGEAR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid insulated load switch, and more particularly, to a solid-state insulated load breaker voltage transformer connection device and a solid insulation having such a connection device in a solid insulated load switch. It relates to a load breaker.

Load Break Switchgear is an electrical equipment used for branching, dividing, testing and maintenance of underground high-voltage distribution lines. It is a high voltage distribution device of tens of kilovolts (kV) to several hundred kilovolts (kV). to be. In general, each phase of R, S, and T of AC has multiple switchgear with movable contactor and fixed contactor and terminal part connected to such switchgear. Since the handling voltage is high voltage, each switchgear has arc arcing and electrical insulation performance. It has a structure embedded in a container containing an insulating gas such as sulfur hexafluoride (SF6) gas.

In recent years, such gas insulated load switch is required to be automatically opened and closed for the purpose of securing safety, speeding up and closing operation and automating maintenance and maintenance, and in accordance with the development of related communication and electric control technology, remote automatic switching A gas insulated load switchgear for installing a control box with a communication and electric actuator control function is being introduced and distributed.

The control box obtains its operating power from the bus side of the load breaker, that is, the line or switch side connected to the underground distribution line, and the control box is driven at a predetermined low DC voltage so that the AC voltage of the high voltage is preset. Potential transformers that can transform and provide DC voltages are installed and used.

On the other hand, the sulfur hexafluoride (SF6) gas is one of the internationally regulated gas causing global warming, the recent switch does not use sulfur hexafluoride (SF6) gas as the insulating gas of the switch, the switch itself is electrically insulated by a solid insulating material. Solid insulation load switch is being developed.

The present invention relates to a connection device for electrically connecting between the voltage transformer and the bus side of the load switch suitable for application to the solid insulated load switch.

  An example of a connection device according to the prior art will be described with reference to FIGS. 1 to 3 as follows.

1 is a front view illustrating a state of use of a gas insulated switchgear according to the related art and a connection device between a bus side and a voltage transformer thereof, and FIG. 2 is a connection device between the bus side and a voltage transformer according to the prior art. Figure 3 is an exploded view showing separately, Figure 3 is an assembled state diagram only the connection device between the bus side and the voltage transformer according to the prior art.

The gas insulated load switch as shown in FIG. 1 is largely divided into a switch main body 1 and a control unit installed in the upper part of the switch main body 1 and remotely controlled to control the automatic opening and closing of the gas insulated load switch. And a battery (9) disposed adjacent to the side of the control box (10) and supplying direct current power to the control box (10), and installed in the lower part of the switch body (1) and in the control box (10). A voltage transformer (3) for supplying power, a bushing (2) for power supply for providing bus-side power to the voltage transformer (3) installed in the switch body (1), and the bus-side and voltage transformers according to the prior art. A power supply side elbow connector 4a, which is connected to the power supply bushing 2 as part of the inter-connection device, and the voltage transformer 3 as part of the connection device between the bus side and the voltage transformer according to the prior art. Voltage transformer side elbow connector 4b and power supply side elbow A cable (CABLE) 5 connected between the connector 4a and the elbow connector 4b on the side of the voltage transformer, and a gas insulated load switch according to the prior art, which are installed under the switch body 1, are grounded. A ground bus-bar (GROUND BUS-BAR) 8 and between the voltage transformer 3 and the control box 10 to supply power from the voltage transformer 3 to the control box 10. It comprises a control box power supply cable 11 to be connected.

The connecting device between the bus bar side and the voltage transformer according to the related art further includes a grounding cable 7 connected to and extending from the cable 5, as shown in FIGS. 2 and 3. It can be assembled by connecting both ends of the power supply side elbow connector 4a and the voltage transformer side elbow connector 4b, respectively.

The installation operation of the connecting device between the bus side and the voltage transformer according to the prior art is assembled by connecting both ends of the cable 5 to the power supply side elbow connector 4a and the voltage transformer side elbow connector 4b as described above. After completing the connection between the bus side and the voltage transformer, connect the power supply elbow connector 4a to the power supply bushing 2 of the switch body 1, and the voltage transformer side elbow connector 4b to the bushing of the voltage transformer 3. Connect to the negative. Next, the connection portion between the power supply side elbow connector 4a and the power supply bushing 2 of the switch body 1 and the voltage transformer side elbow connector 4b and the bushing portion of the voltage transformer 3 is fastened (not shown). By maintaining the connection firmly using to prevent the electric shock accident by the separation in the live state. Finally, the installation is completed by connecting the grounding cable 7 to the grounding bus-bar 8.

The connecting device between the bus side and the voltage transformer according to the related art according to the related art is configured to supply the bus side power from the power source bushing 2 to the power side elbow connector 4a and the cable 5 and the voltage transformer side elbow connector. Received through 4b), the voltage transformer 3 is converted to a predetermined DC voltage, and the converted DC power is operated to be supplied to the control box 10 through the control box power supply cable (11).

However, the connection device between the bus side and the voltage transformer according to the related art as described above has a large number of components composed of two elbow connectors, one cable, and a grounding cable, thereby degrading assembling (productivity). If the distance between the bus side and the voltage transformer (especially the vertical distance) is close, the installation is difficult, occupies a large installation space, there is a problem that a separate grounding cable for the surface ground of the connection device is required.

Therefore, the present invention solves the problems of the prior art, one object of the present invention, it is possible to install in a narrow space between the bus side and the voltage transformer, the installation space is small, can be installed by simple assembly The present invention provides a voltage transformer connection device for a solid insulated load switch having excellent performance. Another object of the present invention is to provide a voltage transformer connection device for a solid insulated load switchgear, which requires no separate device for surface grounding of the connection device.

One object of the present invention, in the solid insulation load switch having a control box for automatic opening and closing control,

A switch body including a switch mechanism for opening and closing a circuit;

A nirvana bus bus unit electrically connected to the switch body and installed at a lower portion of the switch body;

A voltage transformer for supplying power to the control box;

It has an electrical conductor part and an insulating material part incorporating the conductor part, and is connected to the voltage transformer for supplying power from the heat bus bus part and is determined vertically and horizontally according to the vertical and horizontal distances of the voltage transformer and the heat bus bus part. It can be achieved by providing a solid insulated load switch, characterized in that it comprises a connector having a length.

Another object of the present invention is a voltage transformer connection device for a solid insulated load switch according to the present invention, wherein the connector has a semi-conductive coating layer on the surface for grounding. It can be achieved by providing a connection device.

The voltage transformer connection device for the solid-state insulated load switch according to the present invention has a stud and plug bolt having a lower plug portion inserted into the connector in the vertical direction and a screw portion in the upper portion inserted into the hot bar busbar. It has an effect that can occupy the minimum vertical space formed only by the height of the connector between the voltage transformer and the nirvana bus.

The voltage transformer connection device for the solid-state insulated load switch according to the present invention is simply composed of a connector and only components of the stud and plug bolts, and after the screw part of the stud and plug bolts is screwed into the nirvana busbar part, the vertical part of the connector is studd. The connection installation process can be completed simply by pushing the plug portion of the N plug bolt and the bushing portion of the voltage transformer into the horizontal bending extension portion of the connector.

The voltage transformer connection device for a solid insulation load switch according to the present invention has a semi-conductive coating layer for grounding on the surface of the connector, so that a device for a separate surface grounding is unnecessary.

The purpose and structure and effect of the present invention to achieve the above will be more clearly understood by the following description of the preferred embodiment of the present invention with reference to the accompanying drawings.

First, with reference to Figure 4 which is a front view schematically showing the installation state of the voltage transformer connection device and the solid insulation load switch for a solid insulation load switch according to the present invention.

In FIG. 4, the solid insulated load switch according to the present invention includes a control box 10 for automatic opening and closing control, and includes a switch body 1, a hot plate bus unit 20, a voltage transformer 30, and a connector 25. It is configured to include). In FIG. 4, reference numeral 9 denotes a battery that stores the DC power provided from the voltage transformer 30 as a power source for controlling the DC power stored as an emergency power during power failure (10). Reference numeral 11 is a control box power supply cable that is a power line for supplying power to the control box 10 by the voltage transformer 30.

The switch body 1 includes a switch mechanism for opening and closing a circuit (including a fixed contactor, a movable contactor and a mechanism for moving the movable contactor to a position contacting the fixed contactor or a position separated from the fixed contactor). The switch body 1 may be composed of a plurality of opening and closing mechanisms having three withdrawal sides branched to one power inlet side, for example, for branching purposes of the line, and each of the inlet and outlet side opening and closing mechanisms is R, S, T. Since it is provided for a three-phase circuit, a total of 12 switches can be provided. For more detailed internal configuration and operation of such a switch body (1), the applicant of the present invention, the patent application No. 10-2006-0042659 filed on May 11, 2006 (invention name: solid insulation disconnector and using the same) Solid-state insulated switchgear).

The nirvana busbar part 20 is electrically connected to the switch main body 1 and is installed below the switch main body 1. The reason why the platen bus bar 20 is installed under the switch body 1 is that the switch mechanism in the switch body 1 is a solid insulated switchgear. This is because the bushing portion corresponding to the portion is provided to extend below the opening and closing mechanism. The nirvana busbar unit 20 is an electrical connection means provided to connect circuits of the same phase with respect to the opening and closing mechanisms, and may be composed of an electrical conductor and an electrically insulating coating material containing the electrical conductor. Since the nirvana busbars 20 are provided for three-phase circuits of R, S, and T, three are provided in one set, and each of the nirvana busbars 20 is a horizontal busbar, a vertical busbar, and a slope busbar. It will be described later with reference to FIG.

In FIG. 4, reference numeral 25 denotes a voltage transformer connection device according to the present invention, and reference numeral 30 denotes a voltage transformer for supplying power to the control box 10.

On the other hand, Figure 5 is an exploded state diagram showing the disassembled state of the voltage transformer connection device and the integrated bus connector and the voltage transformer for a solid insulated load switch in accordance with the present invention, as shown in Figure 5 voltage transformer connection device according to the present invention Reference numeral 25 is a voltage transformer connection device for a solid insulated load switchgear for connection between a control box power supply voltage transformer and a thermal busbar part, the insulating part having an electrical conductor part and the conductor part, and the thermal element in the voltage transformer. A connector (23) connected for supplying power from the bus bar section, the connector (23) having a vertical and horizontal length determined according to the vertical and horizontal distances of the voltage transformer and the hot spot bus bar section; And a lower PLUG portion inserted into the connector in the vertical direction and an upper screw portion inserted into the nirvana bus portion vertically in the connector, the power source being supplied from the nirvana bus portion. And a stud and plug bolt 24 for transmitting to the connector. In FIG. 5, reference numeral 20 denotes the above-described hot bar bus unit, reference numeral 30 denotes the above-mentioned voltage transformer, and reference numeral 30a denotes a bushing portion that is a part of a power input terminal of the voltage transformer.

On the other hand, with reference to Figures 6 to 8 will be described in detail the configuration of the voltage transformer connection device for a solid insulation load switch according to the present invention.

Figure 6 is a cross-sectional view of the connector only of the voltage transformer connection device for a solid insulated load switch according to the present invention, Figure 7 is an external perspective view of only the voltage transformer connector for a solid insulated load switch according to the present invention, Figure 8 is a present invention Is an enlarged front view of a stud & plug bolt of a voltage transformer connection device for a solid insulation load switch according to the present invention.

The voltage transformer connection device 25 according to the present invention includes the connector 23 and the stud and plug bolt 24 as described above.

As described above, the connector 23 is connected to the voltage transformer 30 to supply power from the heat transfer bus unit (see numeral 30 in FIG. 5), and the voltage transformer 30 and the heat transfer bus unit are vertically and horizontally connected. As a means having vertical and horizontal lengths determined in accordance with the distance, as shown in FIG. 6, it has an electrical conductor portion 23e and an insulating portion 23d incorporating the conductor portion 23e. Here, the vertical and horizontal lengths of the connector 23 are determined according to the vertical and horizontal distances of the voltage transformer 30 and the nirvana bus unit, that is, depending on the limited space between the voltage transformer 30 and the nirvana bus unit. That is, the vertical and horizontal lengths of the connector 23, that is, the three-dimensional size, are made in advance according to the vertical and horizontal distances between the voltage transformer 30 and the nirvana bus unit.

The insulator portion 23d of the connector 23 may be formed of silicon (SILICON) material.

 In Fig. 6, the connector 23 has a semi-conductive coating layer 23g on its surface for grounding. Here, the semi-conductive coating layer 23g can be obtained by coating a material obtained by mixing an ethylene-based synthetic resin material as a main raw material, for example, carbon black, which is a conductive powder material, such as a conductive plastic. have.

In addition, the connector 23 is a part for electrically and mechanically connecting the plug portion of the stud and plug bolt 24 (see reference numeral 24b in FIG. 8) and the part for connecting the voltage transformer (see reference numeral 30 in FIG. 5). At least one portion includes a multi contact band 23f for electrical connection. Here, MULTI CONTACT BAND is an electrical connector product of Multi-Contact, a multinational manufacturer of industrial electrical connectors, and a plurality of strips made of an alloy of copper and aluminum. It is a typical product that is formed by connecting each other like a strip, and has excellent electrical characteristics such as high conductivity, low contact resistance, high heat resistance, small installation space, and excellent corrosion resistance, and is manufactured in a small size. It is also being used in.

In Fig. 6, reference numeral 23e-1 denotes a plug receiving groove for accommodating a multi-contact band 23f fixed to an intermediate portion of the length and accommodating the plug portion of the stud and plug bolt 24 (see reference numeral 24b in Fig. 8). It is formed at one end of the conductor portion 23e as indicating the portion. In FIG. 6, reference numeral 23a designates a vertical portion of the outer shape of the connector 23 as shown more clearly in FIG. 7, and reference numeral 23a-1 designates the nirvana busbar portion (shown in FIGS. 4 and 5 and described above with reference numeral 20). ) Indicates a bus bar connecting part for connecting, and reference numeral 23b indicates a horizontal part of the outer shape of the connector 23 as can be seen more clearly in FIG. 7.

The connector 23 according to the present invention, as can be seen with reference to FIG. 7, is a vertical portion 23a for connecting to the upper nirvana busbar portion (see reference numeral 20 shown in FIGS. 4 and 5 and described above). And a mating connection between the horizontal section 23b extending at right angles from the vertical section 23a and the horizontal section 23b extending from the horizontal section 23b, and the voltage transformer for supplying the control box (see reference numeral 30 in FIGS. 4 and 5). The female bushing portion 30a is configured to include a bent extension socket SOCKET portion 23c connected to be inserted therein.

On the other hand, the stud and plug bolt 24 according to the present invention is connected to the connector (see reference numeral 23 of Figs. 4 and 5) from the power bus bar portion (see Fig. 4 and 5 and reference numeral 20 described above). It is formed of an electrical conductor as a means for delivery.

The stud and plug bolt 24 according to the present invention has a lower plug portion 24b inserted into the connector in the vertical direction, and an upper screw portion 24a inserted into the hot busbar portion in the vertical direction. ) As shown in FIG. 8, the stud and plug bolt 24 according to the present invention has a diameter greater than that of the screw portion 24a and the plug portion 24b at the boundary between the screw portion 24a and the plug portion 24b. The large large diameter part 24c is provided. The function of the large-diameter portion 24c is to define the boundary between the area where the stud and plug bolt 24 is vertically inserted into the upper busbar busbar portion and the portion that is vertically inserted into the lower connector 23. To distinguish.

On the other hand, Figure 9 is an assembled state front view showing the assembled state of the voltage transformer connection device and the solid-state bus connector and the voltage transformer for a solid insulated load switch according to the invention, Figure 10 is a voltage transformer connection for a solid insulated load switch in accordance with the present invention An assembled state side view showing the assembled state of the device, the integrated bus connector and the voltage transformer. As shown in FIGS. 9 and 10, the solid insulation according to the present invention is provided even in an environment in which a vertical distance between the nirvana bus unit 20 and the voltage transformer 30 is smaller than the height of the voltage transformer 30. The voltage transformer connection device for the load switch can be suitably installed since the vertical height occupies only the height of the vertical portion of the connector 23 (see reference numeral 23a in FIG. 6).

On the other hand, Figure 11 is a perspective view of the hot-bar bus unit connected to the voltage transformer connection device for a solid insulated load switch according to the present invention.

The nirvana busbar unit 20 may be provided in one solid insulated load switch system for three phases of R, S, and T, and the nirvana busbar unit 20 as shown in FIG. As one example, the horizontal busbar part 20a, the vertical busbar part 20b, and the inclination busbar part 20c are comprised. Each horizontal busbar portion 20a, vertical busbar portion 20b, and inclined busbar portion 20c are made of a synthetic resin material insulating material containing electrical conductors electrically connected to each other therein. The vertical busbar part 20b is a part connected to the bushing which is a power take-out part extended from the upper switch body 1 in FIG. 4, and the inclination busbar part 20c is the horizontal busbar part 20a and the vertical busbar part 20b. ), And the horizontal bus bar portion 20a is a portion for electrically connecting the opening and closing mechanism (not shown) in the switch body main body 1 of the same phase to each other.

In FIG. 11, reference numeral 20b-1 designates a vertical bus bar connection port which is a connection hole.

As shown in FIG. 4, the horizontal bus bar portion 20a is installed to extend in the longitudinal direction of the lower portion of the switch body 1, and the vertical bus bar portion 20b extends from the switch body 1 of the upper portion. It extends in the vertical direction to be connected to the bushing, which is a power drawer, and the inclined busbar part 20c extends obliquely to connect the horizontal busbar part 20a and the vertical busbar part 20b.

On the other hand, Figure 12 is an overall perspective view of a solid insulation load switch is connected to the voltage transformer connection device for a solid insulation load switch according to the present invention.

As shown in FIG. 12, the solid insulated load switch according to the present invention having a control box 10 for automatic opening and closing control at the top thereof includes an opening and closing mechanism for opening and closing a circuit in a lower portion of the control box 10. A built-in switchgear body 1 is provided, and a nirvana busbar portion 20 electrically connected to the switchgear body 1 is provided at a lower portion of the switchgear body, and supplies power to the control box 10 at the bottom. The voltage transformer 30 is installed, and the connector 23 is connected between the voltage transformer 30 and the nirvana bus unit 20 so as to electrically connect the voltage transformer 30 and the nirvana bus unit 20. do. In FIG. 12, reference numeral 8 denotes a ground busbar, reference numeral 9 denotes a battery, and reference numeral 1a denotes a manual open / close actuator.

The operation of assembling the voltage transformer connection device for a solid insulation load switch according to the present invention configured as described above will be described with reference to FIGS. 5, 9, and 10.

First, the screw portion of the stud and plug bolt 24 is screwed into a female thread portion (not shown) in the resin busbar connection port of the vertical busbar portion of the nirvana bus portion 20, and then the screwed and plug bolt ( The vertical portion of the connector 23 is pushed toward the plug portion such that the plug portion of 24 is inserted into the plug receiving groove portion 23e-1 of the connector 23. Next, when the bushing portion of the voltage transformer 30 is pushed into the bent extension socket portion of the connector 23, the assembly operation of the voltage transformer connection device for the solid-state insulation load switch according to the present invention is completed.

The voltage transformer connection device for a solid insulated load switch according to the present invention, which has been assembled as described above, is connected to the outlet and plug bolts according to the present invention through a bushing part and a nirvana bus part 20 which are the drawing terminal parts. 24, the power supply operation is performed in such a way that current flows through the voltage transformer 30 through the multi-contact band 23f and the conductor portion 23e of the connector 23.

1 is a front view illustrating a state of use of a gas insulated load switch according to the related art and a configuration of a connection device between a bus side and a voltage transformer thereof according to the prior art;

Figure 2 is an exploded view showing only the connection device between the bus side and the voltage transformer according to the prior art separately,

3 is an assembly state diagram of the connection device between the bus side and the voltage transformer according to the prior art,

Figure 4 is a front view schematically showing the installation state of the voltage transformer connection device and the solid insulation load switch for a solid insulation load switch according to the present invention,

5 is an exploded state diagram showing an exploded state of a voltage transformer connection device for an insulated solid state load switch and an integrated bus coupler and a voltage transformer according to the present invention;

6 is a cross-sectional view of the connector only in the voltage transformer connection device for a solid insulation load switch according to the present invention,

7 is an external perspective view of the connector only in the voltage transformer connection device for a solid insulation load switch according to the present invention;

8 is an enlarged front view of a stud and plug bolt of a voltage transformer connection device for a solid insulation load switch according to the present invention;

9 is an assembled state front view showing an assembled state of a voltage transformer connection device for an insulated solid state load switch and an integrated hot-bar bus unit and a voltage transformer according to the present invention;

10 is an assembled state side view showing the assembling state of the voltage transformer connection device for the solid-state insulated load switch and the integrated hot-bar bus unit and the voltage transformer according to the present invention;

11 is a perspective view of a nirvana bus unit to which a voltage transformer connection device for a solid insulation load switch according to the present invention is connected;

12 is an overall perspective view showing the overall appearance of a solid insulated load switch installed with a voltage transformer connection device for a solid insulated load switch in accordance with the present invention.

* Explanation of symbols on the main parts of the drawings

1: Actuator main body 1a: Manual open / close actuator

2: Bushing for power supply 3: Voltage transformer

4a: elbow connector on power side

4b: Elbow connector on voltage transformer side 5: Cable

7: Cable for ground 8: Ground bus-bar

9: battery 10: control box

11: Control box power supply cable

20: nirvana bus part 20a: horizontal busbar part

20b: vertical busbar part 20b-1: vertical busbar part conductor part

20c: inclined busbar

23: connector 23a: vertical section

23a-1: bus bar connection

23b: horizontal portion 23c: bending extension socket portion

23d: insulation material

23e: conductor part 23e-1: plug receiving groove part

23f: MULTI CONTACT BAND

23g: semi conductive cloth layer

24: STUD & PLUG BOLT

24a: screw portion 24b: plug portion

24c: large diameter part 25: voltage transformer connection device

30: voltage transformer 30a: bushing part

Claims (13)

In the solid insulated load switchgear having a control box for automatic switching control, A switch body including a switch mechanism for opening and closing a circuit; A nirvana bus bus unit electrically connected to the switch body and installed at a lower portion of the switch body; A voltage transformer for supplying power to the control box; It has an electrical conductor part and an insulating material part incorporating the conductor part, and is connected to the voltage transformer for supplying power from the heat bus bus part and is determined vertically and horizontally according to the vertical and horizontal distances of the voltage transformer and the heat bus bus part. A solid insulated load switch comprising a connector having a length. The method of claim 1, An electrical conductor, and having a lower plug portion inserted into the connector in the vertical direction and a screw portion in the upper portion inserted into the hot bus bus portion, the power source being supplied from the hot bus bus portion; Solid insulated load switchgear characterized in that it further comprises a stud and plug bolt for transmitting to the connector. The method of claim 1, The visitor is, A vertical portion for connecting to the upper nirvana bus portion; A horizontal portion extending at right angles from the vertical portion; And And a bending extension socket (SOCKET) portion which is bent from the horizontal portion and connected to be inserted into the connection counterpart of the control box power supply voltage transformer. The method of claim 1, And said connector has a semi-conductive sheathing layer on the surface for grounding. The method of claim 4, wherein Wherein the semi-conductive coating layer is a solid insulating load switch, characterized in that the coating layer composed of a conductive carbon black (carbon black) powder material to the ethylene (ETHYLENE) -based synthetic resin material. The method of claim 2, The connector includes a multi-contact band (MULTI CONTACT BAND) for electrical connection in at least one of the portion for connecting the voltage transformer and the electrical and mechanical connection to the plug portion of the stud and plug bolt Solid insulated load switchgear characterized in that. The method of claim 2, And the stud and plug bolt has a larger diameter portion at a boundary portion between the screw portion and the plug portion than the screw portion and the plug portion. In the voltage transformer connection device for a solid insulated load switchgear for the connection between the control box power supply voltage transformer and the hot-bar busbar part, It has an electrical conductor part and an insulating material part incorporating the conductor part, and is connected to the voltage transformer for supplying power from the heat bus bus part and is determined vertically and horizontally according to the vertical and horizontal distances of the voltage transformer and the heat bus bus part. A connector having a length; And An electrical conductor, and having a lower plug portion inserted into the connector in the vertical direction and a screw portion in the upper portion inserted into the hot bus bus portion, the power source being supplied from the hot bus bus portion; A voltage transformer connection device for a solid insulated load switch comprising a stud and plug bolt for transmitting to a connector. The method of claim 8, And the insulating material portion of the connector is formed of silicon material. The method of claim 8, The visitor is, A vertical portion for connecting to the upper nirvana bus portion; A horizontal portion extending at right angles from the vertical portion; And And a bending extension socket (SOCKET) portion extending from the horizontal portion and connected to be inserted into the connection counterpart of the control box power supply voltage transformer. . The method of claim 8, And said connector has a semi-conductive coating layer on its surface for grounding. The method of claim 8, The connector includes a multi-contact band (MULTI CONTACT BAND) for electrical connection in at least one of the portion for connecting the voltage transformer and the electrical and mechanical connection to the plug portion of the stud and plug bolt Voltage transformer connection device for a solid insulated load switch. The method of claim 8, And the stud and plug bolt has a larger diameter portion at a boundary portion between the screw portion and the plug portion than a diameter of the screw portion and the plug portion.

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