KR102086949B1 - The busbar for eco-friendly gas insulated load break switch to possess modular design of insulation parts - Google Patents

Abstract

The present invention relates to a busbar for an eco-friendly gas insulated load break switch having an assembly insulation part and, more specifically, to a busbar for an eco-friendly gas insulated load break switch having an assembly insulation part, which has phase-to-phase and phase-to-ground insulation of a busbar by having an assembly insulation part so that the busbar can be used within a gas tank of an eco-friendly gas insulated load break switch. The busbar comprises: a three-phase switch connection busbar connected to an upper fixed contact of the eco-friendly gas insulated load break switch; a three-phase bushing connection busbar connected to a lower fixed contact of the eco-friendly gas insulated load break switch; a ground contact busbar provided on a rear side of the three-phase bushing connection busbar and connected to a lower fixed ground contact point of the eco-friendly gas insulated load break switch; and a ground bushing bus bar having a lower end connected to the ground contact busbar and an upper end connected to a ground bushing.

Description

The busbar for eco-friendly gas insulated load break switch to possess modular design of insulation parts}

The present invention relates to a busbar of an eco-friendly gas insulated load switch provided with an assembled insulation, and more particularly, to a busbar phase and a counterpart having an assembled insulation to use a busbar in a gas tank of an eco-friendly gas insulated load switch. The present invention relates to a busbar of an eco-friendly gas insulated load switch provided with an assembled insulating part having insulation between sections.

The gas insulated load switch is used for line division, branching and transformer protection of the switchgear of the high pressure consumer, and the epoxy insulated load switch using the solid insulation material such as epoxy mold and the gas insulated load using SF6 gas as the insulating material. Switchgear is known. Accordingly, busbars of a gas insulated load switch using the existing SF6 gas have been used in the gas without any insulator treatment in the tank due to the high insulation of the SF6 gas.

Recently, a technology for using an eco-friendly compressed gas without using SF6 gas has been developed. The eco-friendly gas insulated multi-circuit switch and circuit breaker is equipped with a ground switch.The eco-friendly gas has a lower dielectric strength than the SF6 gas and must maintain the same tank size as the existing SF6 gas insulated multi-circuit switch and circuit breaker. Nitrogen gas, mixed carbon dioxide gas, etc.) has a problem that it is difficult to use the busbar in the tank filled.

1. Registered Patent Publication No. 10-0364826 (December 02, 2002) 2. Registered Patent Publication No. 10-1100706 (registered Dec. 23, 2011) 3. Publication No. 10-2017-0051655 (published May 12, 2017) 4. Publication No. 10-2018-0109549 (published Oct. 8, 2018)

In order to solve the above problems, an object of the present invention is to replace the existing SF6 gas with an environmentally friendly gas, and to provide a busbar of an eco-friendly gas insulated switchgear having an assembled insulation that can be implemented in a tank of the same size. .

In order to achieve the above object, the present invention, a three-phase switch connection busbar connected to the upper fixed contact of the environmentally friendly gas insulation load switch; A three-phase bushing connection busbar connected to the bottom fixed contact of the eco-friendly gas insulated load switch; A ground contact bus bar provided at a rear side of the three-phase bushing connection bus bar and connected to a lower fixed ground contact of the eco-friendly gas insulated load switch; And a lower end connected to the ground contact bus bar, and an upper end connected to the ground bushing, the ground bushing bus bar. The bus bar of the eco-friendly gas insulation load switch provided with the assembled insulation part may be configured.

In the present invention, each of the three-phase switch connection busbars includes a busbar body; One or more bidirectional insulating covers inserted to surround the busbar body; A pair of unidirectional insulating covers inserted into both ends of the busbar body; A spacer inserted between the unidirectional insulating cover and the bidirectional insulating cover or the bidirectional insulating cover to maintain a predetermined distance and to connect the insulating covers to each other; And a gasket cover for busbar body to insulate a contact from the upper portion of each of the unidirectional insulating cover and the bidirectional insulating cover.

In the present invention, the unidirectional insulation cover, the unidirectional insulation cover fastening portion formed with a fastening hole is formed so that the upper fixed contact of the eco-friendly gas insulation load switch is connected to the busbar body, and integrally in any one side of the unidirectional insulation cover fastening portion It is characterized in that it comprises a unidirectional insulating cover extending portion, and a unidirectional insulating cover shaft tube is formed so as to be inserted into the spacer is inserted in the unidirectional insulating cover extension.

In the present invention, the bidirectional insulating cover includes a bidirectional insulating cover fastening part formed with a fastening hole to be connected to the busbar body by inserting a fixed contact point of an eco-friendly gas insulated load switch, and integrally extending to both sides from the bidirectional insulating cover fastening part, respectively. The bidirectional insulating cover extension portion and the bidirectional insulating cover extending from the bidirectional insulating cover extension is formed so that the spacer can be inserted.

In the present invention, the three-phase bushing connection busbar is formed in the same number as the eco-friendly gas insulated load switchgear, and each of the three-phase bushing connection busbars includes a gasket cover for the bushing connection busbar and a gasket cover for the bushing connection busbar. Three bushing insulation cover seated on the upper portion, and the bushing connection busbar body is fixed to the inside of the bushing insulation cover.

In the present invention, the bushing insulation cover is characterized in that the bushing insulation cover fastening portion is inserted and connected to the lower end of the switch and the bushing connection portion is formed integrally extending on one side of the fastening portion is inserted into the bushing is fixed. .

Ground contact busbar in the present invention, the ground contact busbar body; A bidirectional insulating cover for one or more ground contacts inserted surrounding the ground contact busbar body; A unidirectional insulating cover for a pair of ground contacts inserted into both ends of the ground contact busbar body; A ground contact spacer inserted between the unidirectional insulation cover for the ground contact and the bidirectional insulation cover for the ground contact or the bidirectional insulation cover for the ground contact to maintain a predetermined distance, and to connect the insulation cover for the ground contact to each other; And a ground contact gasket cover for insulating a contact from each lower portion of the ground contact unidirectional insulation cover and ground contact bidirectional insulation cover.

The present invention makes it possible to replace the existing SF6 gas with an environmentally friendly gas, and because it can be applied to the same size as the conventional tank can bring a significant cost savings effect.

In addition, the present invention has the advantage that the insulating distance between the busbars can be secured in the same size tank because the insulating effect of the SF6 gas as in the prior art.

1 is a busbar structure diagram of a conventional SF6 gas insulated load switch.
Figure 2 is a full perspective view of the busbar of the eco-friendly gas insulation load switch according to the present invention.
3 is an exploded perspective view of a switch connection busbar of an eco-friendly gas insulated load switch according to the present invention;
Figure 4 is an exploded perspective view of a switch connection busbar connected to the instrument transformer bushing busbar of the eco-friendly gas insulation load switch according to the present invention.
5 is an exploded perspective view of a bushing connection busbar of an eco-friendly gas insulated load switch in accordance with the present invention.
Figure 6 is an exploded perspective view of the ground contact busbar of the eco-friendly gas insulated load switch according to the present invention.
Figure 7 is an exploded perspective view of the ground bushing busbar of the eco-friendly gas insulated load switch according to the present invention.
Figure 8 is a perspective view showing the connection to the eco-friendly gas insulated load switch according to the present invention.
9 is a perspective view showing that the fixed contact point of the eco-friendly gas insulated load switch according to the present invention is connected to the bushing connection busbar and the ground contact busbar.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this is to explain in detail enough to easily practice the invention having ordinary knowledge in the art to which the present invention belongs, and this does not mean that the technical spirit and scope of the present invention is limited.

1 is a busbar structure diagram of a conventional SF6 gas insulated load switchgear, FIG. 2 is a whole perspective view of a busbar of an eco-friendly gas insulated load switch in accordance with the present invention, and FIG. 3 is a switch connection of an eco-friendly gas insulated load switch in accordance with the present invention. 4 is an exploded perspective view of a busbar of an eco-friendly gas insulated load switch according to the present invention. FIG. 4 is an exploded perspective view of a switch bar connected to a switch bar connected to a busbar, and FIG. 5 is a bushing of an eco-friendly gas insulated load switch according to the present invention. 6 is an exploded perspective view of the ground contact busbar of the eco-friendly gas insulated load switch according to the present invention, and FIG. 7 is an exploded perspective view of the ground bushing busbar of the eco-friendly gas insulated load switch according to the present invention. 8 is a perspective view showing that it is connected to an eco-friendly gas insulated load switch according to the present invention, and FIG. 9 is according to the present invention. Environment is the fixed contact of the gas-insulated load break switch perspective view of the bushing connecting busbar earthing contact bar connected booth.

1 is a perspective view of a busbar of a gas insulated load opening device using a conventional SF6 gas. As shown in the figure, the busbar body is used as it is without a separate insulator. This is because the high dielectric strength of SF6 gas prevents the occurrence of sparks between busbars even when used without a separate insulator. Recently, the development of eco-friendly gas insulated load switch that can replace SF6 gas is being encouraged as SF6 gas is defined as the main culprit of global warming phenomenon.

2 is a perspective view of the busbar structure of the eco-friendly gas insulated load switch according to the present invention. As shown in the figure, the structure of the busbar according to the present invention is composed of three phases of the switch connection busbar 10 connected to the upper fixed contact point of the eco-friendly gas insulated load switch, and the eco-friendly gas insulated load switch 100. Bushing connection busbar 20 to which the bottom fixed contact is connected, ground contact busbar 30 to which the ground contact of the bottom of the eco-friendly gas insulated load switch 100 is connected, and grounding busbar to which the ground bushing is connected. It consists of 40.

3 is an exploded perspective view of a switch connecting busbar according to the present invention. The switch connecting busbar 10 includes a busbar body 11, one or more bidirectional insulating covers 12 inserted into the busbar body 11, and a bidirectional insulating cover 12 inserted into the busbar body 11. A spacer 14 inserted between the bidirectional insulating cover 12 and the unidirectional insulating cover 13 to maintain a predetermined distance, the unidirectional insulating cover 13 fixed to both ends of the busbar body 11, Busbar body gasket which is fastened and fixed on the top of the eco-friendly gas insulated load switch by being located on the upper part of the insulating cover fastening parts 121 and 131 for fixing the busbar body 11 and the insulating covers 12 and 13 and the spacer. It consists of a cover 15. Specifically, first, the bidirectional insulating cover 12 and the spacer 14 are inserted into the busbar body 11, and the unidirectional insulating cover 13 is inserted into both ends of the busbar body 11, and then the bidirectional insulating cover ( 12) and the one-way insulating cover 13 to be fixed to the busbar body (11). The bidirectional insulating cover 12 and the unidirectional insulating cover 13 fasten the fastening bolt b to the fastening hole 111 of the busbar body 11 through the fastening holes formed in the insulating cover fastening portions 121 and 131. Is done. The upper and lower portions of the bidirectional and unidirectional insulating cover fastening parts 121 and 131 fix the entire busbar 10 while the gasket cover 15 for the busbar body for insulation is fastened to the top of the eco-friendly gas insulated load switch. . Silicon gaskets (Ga) are introduced into the gasket cover 15 and the fastening portions 121 and 131 of the bidirectional and unidirectional insulating covers 12 and 13 to increase insulation. In addition, when the gasket Gb is inserted into the lower parts of the fastening parts 121 and 131 of the bidirectional and unidirectional insulating covers 12 and 13 and connected to the upper fixed contact 101 of the eco-friendly gas insulated switchgear 100, the insulation performance is improved. Increase. The spacer 14 mounted between the bidirectional insulating cover 12 or between the bidirectional insulating cover 12 and the unidirectional insulating cover 13 is inserted into and fixed to the shaft portions 123 and 133 of the insulating covers 12 and 13. In order to seal the spacer 14, packings 124 and 134 are provided at ends of the shaft tubes 123 and 133 to improve the sealing force of the spacer.

Looking at the bidirectional insulating cover 12, the bidirectional insulating cover fastening portion 121, the bidirectional insulating cover extensions 122: 122a, 122b formed on both sides of the fastening portion 121, and the bidirectional insulating cover extension 122 It consists of a bidirectional insulating cover shaft pipe portion (123: 123a, 123b) that is formed by extending in the tube (122a, 122b). At the ends of the tube parts 123: 123a and 123b, cylindrical grooves into which the packings 124: 124a and 124b can be inserted may be formed.

The unidirectional insulating cover 13 may include a unidirectional insulating cover fastening part 131, a unidirectional insulating cover fastening part 131, and a unidirectional insulating cover extension part 132, which is formed to extend to one side. Consists of a unidirectional insulating cover shaft tube portion 133 extending from the shaft.

4 is a PT bushing connection unidirectional insulating cover 16 to which a PT (Potential Transformer) bushing (not shown) is mounted and fixed to one end of the busbar body 11. The PT bushing connection unidirectional insulation cover 16 includes a unidirectional insulation cover fastening portion 161, a unidirectional insulation cover extension portion 162 extending to one side from the unidirectional insulation cover coupling portion 161, and a unidirectional insulation cover extension portion ( The unidirectional insulating cover bushing portion 163 extending from the unidirectional insulating cover bushing 161, the unidirectional insulating cover bushing side extending portion 165 extending from the unidirectional insulating cover fastening portion 161 to the other side, and the unidirectional insulating cover bushing side extending portion ( The PT bushing insulation cover 166 is bent at 165. The PT bushing bus bar 112 is connected to the bus bar main body 11 inside the PT bushing insulation cover 166. A PT bushing insulation cover gasket cover 15b is mounted on the rear side of the PT bushing insulation cover 166, and a silicon gasket Ga is inserted between the rear surface of the PT bushing insulation cover 166 and the gasket cover 15b. Other configurations are the same as the configuration of FIG. 3, so a detailed description thereof will be omitted.

5 is a view of a bushing connection busbar 20. The bushing connection busbar 20 is formed in the same number as the eco-friendly gas insulated load switch installed, and is typically composed of four bushing connection busbars 20 as four circuit switches. The bushing connection busbar 20 is a bushing connection busbar gasket cover 21, a bushing insulation cover 22 fixed to the upper portion of the gasket cover 21, and a bushing connection busbar 20 fixed to the inside of the bushing insulation cover 22. The bushing connection busbar body 23 and the bushing end portion (not shown) connected to the bushing connection busbar body 23 are disposed between the tightening nut 24 and the bushing end portion and the fastening nut 24. It consists of a washer 25. The bushing connecting busbar body 23 is fixed to the bushing insulation cover 22 by a fastening bolt b. A gasket (Ga) made of silicon is inserted between the gasket cover 21 and the bushing insulating cover 22, and the gasket (Ga) is also inserted between the gasket cover 21 and the bushing insulating cover fastening part 221 connected to the lower fixed contact of the eco-friendly gas insulated load switch. Gb) is published. As shown in the figure, three bushing connection busbars 20 are configured in one set so that three phases can be connected.

6 is a diagram of the ground contact busbar 30. As shown in the figure, the ground contact busbar 30 includes a ground contact busbar body 31, a ground contact bidirectional insulating cover 32 inserted into the ground contact busbar body 31, and a ground contact. Spacer inserted into and fixed between the unidirectional insulating cover 33 for the ground contact inserted into both ends of the busbar body 31, or between the bidirectional insulating cover 32 or between the bidirectional insulating cover 32 and the unidirectional insulating cover 33 ( 34 and a ground contact booth part gasket cover 35 fixedly mounted to the lower ends of the fastening portions 321 and 331 of the bidirectional insulating cover 32 and the unidirectional insulating cover 33. The gasket Ga is inserted between the gasket cover 35 and the fastening portions 321 and 331 of the insulating covers 32 and 33 to double the insulation performance. The unidirectional insulating cover 33 may include a fastening part 331, an extension part 332 extending to one side of the fastening part 331, a conduit tube part 333 extending from the extension part 332, and an extension part 333. It is composed of a packing 334 is inserted into the end of the shaft tube 333. The bidirectional insulating cover 32 is axially extended from the fastening part 321, the extending parts 322: 322a and 322b extending to both sides of the fastening part 321, and the extending parts 322: 322a and 322b. Consists of the conduit tubes (323: 323a, 323b), the packing (324: 324a, 324b) is inserted into the end of the shaft tube (323: 323a, 323b) is configured to seal the spacer. The busbar body 31 has the busbar body (3) inside the insulating cover (32, 33) while the fastening bolt (b) is fastened in the fastening portion (321, 331) through the fastening hole (311) formed in the body (31). 31) is fixed.

7 is a diagram of the ground bushing busbar 40. As shown in the figure, the grounding bushing busbar body 41, the grounding bushing busbar insulating cover 42 inserted and fixed to the upper and lower ends of the body, and the spacer 43 inserted between the insulating cover 42. And a grounding bushing gasket cover 44 mounted on the rear side of the fastening portion 421 of the insulating cover 42, a grounding bushing insulating cover 46 connected to the upper insulating cover 42, and grounding. It is composed of a grounding bushing connection busbar 47 inserted into the bushing insulation cover 46 and fixed to the upper end of the grounding bushing busbar body 41 by a fastening bolt b.

FIG. 8 shows that the upper fixed contact 101 of the eco-friendly gas insulated load switch 100 is connected to the busbar body 11 of the switch connection bus bar 10, and FIG. 9 shows the bottom of the eco-friendly gas insulated load switch. It is shown that the lower fixed contact point 102 and the lower fixed contact point 103 formed in the connection to the busbar body 21 of the bushing connection busbar 20.

The gasket covers 15, 21, 35, and 44 described above are preferably made of an epoxy material, and the gaskets Ga, Gb, and Gc are preferably made of silicon.

As described above, the insulator was formed to have the same insulation performance in the tank of the gas insulated load switch in the same size as the conventional one. Therefore, even if the SF6 gas is replaced with an eco-friendly gas in the gas insulated load switch having a conventional structure, the same insulation performance can be obtained without incurring a large cost by replacing the structure of the bus bar with an insulator. There is this.

Although the embodiments have been described above by way of example, it will be apparent to those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit and scope thereof. Accordingly, the described embodiments are to be considered as illustrative and not restrictive, and all embodiments within the scope of the appended claims and their equivalents shall be included within the scope of the present invention.

10: switchgear busbar 11: busbar body
12: bidirectional insulating cover 13: unidirectional insulating cover
14 spacer 15 gasket cover for busbar body
16: PT bushing connection unidirectional insulation cover
20 (20a, 20b, 20c, 20d): bushing connection busbar
21: Gasket cover for bushing connection busbar
22: bushing insulation cover 23: bushing connecting busbar body
24: tightening nut 25: washer
30: ground contact busbar 31; Ground contact busbar body
32: bidirectional insulating cover for ground contact 33: unidirectional insulating cover for ground contact
34: spacer for ground contact 35: gasket cover for ground contact
40: ground bushing busbar 41: ground bushing busbar body
42: one-way insulating cover for ground bushing busbar 43: spacer for ground bushing busbar
44: gasket cover for grounding bushing busbar 45: spacer for fastening busbar
46: grounding bushing insulation cover 47: grounding bushing connection busbar

Claims (7)

It is connected to the upper fixed contact of the eco-friendly gas insulation load switch, busbar body; One or more bidirectional insulating covers inserted to surround the busbar body; A pair of unidirectional insulating covers inserted into both ends of the busbar body; A spacer inserted between the unidirectional insulating cover and the bidirectional insulating cover or the bidirectional insulating cover to maintain a predetermined distance and to connect the insulating covers to each other; And a busbar main body gasket cover for insulating a contact from each of the unidirectional insulating cover and the bidirectional insulating cover.
A three-phase bushing connection busbar connected to the bottom fixed contact of the eco-friendly gas insulated load switch;
A ground contact bus bar provided at a rear side of the three-phase bushing connection bus bar and connected to a lower fixed ground contact of the eco-friendly gas insulated load switch; And
A bus bar of an eco-friendly gas insulated load switchgear having an assembled insulation, characterized in that the lower portion is connected to the ground contact busbar and the upper portion is connected to the grounding bushing bar.
delete The method of claim 1,
The unidirectional insulating cover,
A unidirectional insulating cover fastening part having a fastening hole formed to be connected to the busbar body by inserting an upper fixed contact point of the eco-friendly gas insulated load switch, and a unidirectional insulating cover extension part integrally extending to one side from the unidirectional insulating cover fastening part And a one-way insulating cover shaft tube formed by the one-way insulating cover extension part to be inserted into the spacer so as to be inserted into the spacer.
The method of claim 1,
The bidirectional insulating cover,
A bidirectional insulating cover fastening part having a fastening hole formed to be connected to the busbar body by inserting a fixed contact point of the eco-friendly gas insulated load switch, and a bidirectional insulating cover extension part integrally extending to both sides from the bidirectional insulating cover fastening part; Busbar of the eco-friendly gas insulated load switchgear with an assembled insulation is characterized in that the conduit is formed in the bi-directional insulating cover extension portion is formed so that the spacer can be inserted into the spacer.
The method of claim 1,
The three-phase bushing connection busbar is formed equal to the number of the eco-friendly gas insulated load switchgear,
The three-phase bushing connection busbar,
An assembly type comprising: a gasket cover for the bushing connection busbar, three bushing insulation covers seated on an upper portion of the bushing connection busbar gasket cover, and a bushing connection busbar body fixed inside the bushing insulation cover. Busbar of eco-friendly gas insulated switchgear with insulation part.
The method of claim 5,
The bushing insulation cover,
The bushing insulation cover fastening part connected to the lower fixing contact point of the switch is inserted and formed integrally extending on one side of the fastening part and the bushing connection part is characterized in that it comprises an bushing connection part is inserted and fixed Busbar of gas-insulated load switch.
The method of claim 1,
The ground contact busbar,
Ground contact busbar body;
A bidirectional insulating cover for one or more ground contacts inserted surrounding the ground contact busbar body;
A unidirectional insulating cover for a pair of ground contacts inserted into both ends of the ground contact busbar body;
A ground contact spacer inserted between the one-way insulation cover for the ground contact and the two-way insulation cover for the ground contact or the two-way insulation cover for the ground contact to maintain a predetermined distance, and to connect the insulation cover for the ground contact to each other; And
A ground contact gasket cover for insulating a contact from a lower portion of each of the one-way insulating cover for ground contact and the two-way insulating cover for ground contact;
Busbar of the eco-friendly gas insulated load switch provided with an assembled insulation, characterized in that consisting of.

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