KR20150010369A - Disconnecting switch of gas insulated switchgear - Google Patents

Disconnecting switch of gas insulated switchgear Download PDF

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Publication number
KR20150010369A
KR20150010369A KR1020130085316A KR20130085316A KR20150010369A KR 20150010369 A KR20150010369 A KR 20150010369A KR 1020130085316 A KR1020130085316 A KR 1020130085316A KR 20130085316 A KR20130085316 A KR 20130085316A KR 20150010369 A KR20150010369 A KR 20150010369A
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KR
South Korea
Prior art keywords
arc contact
movable
contact
arc
movable part
Prior art date
Application number
KR1020130085316A
Other languages
Korean (ko)
Inventor
김현승
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020130085316A priority Critical patent/KR20150010369A/en
Publication of KR20150010369A publication Critical patent/KR20150010369A/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The present invention relates to a disconnector for a gas insulated switchgear, and more particularly, to a disconnector for improving the opening and closing performance of an arc generated when a charging current is opened and closed in a disconnector contact structure of a gas insulated switchgear.
The present invention relates to a movable part having an arc contact at a center thereof and having an annular movable main contact point spaced apart from the movable arc contact, a fixed station arc contact connected to the movable part arc contact, A disconnector of a gas insulated switchgear comprising a fixed portion having a fixed main contact, the disconnector comprising: a movable portion auxiliary arc contact provided along the periphery of the movable portion arc contact; and a movable portion auxiliary arc contact resiliently And a movable portion arc shield provided with an elastic support for supporting the movable portion arc shield.

Description

DISCONNECTING SWITCH OF GAS INSULATED SWITCHGEAR BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disconnector of a gas insulated switchgear, and more particularly, to improving the opening / closing performance of an arc generated when a charge current is opened and closed in a disconnector contact structure of a gas insulated switchgear.

The Gas Insulated Switchgear (GIS) is a system in which a switching device such as a breaker, a disconnecting switch, etc., a transformer, a lightning arrester, and a main circuit bus are housed in a metal tank in a lump while a live part is supported by a solid insulator (Spacer) SF6 gas with excellent insulating performance and SOHO capability is filled with an insulating medium and sealed.

The main devices of internal pressure of GIS are gas breakers, disconnectors, folding switches, lightning arresters, potent transformers, and current transformers.

In the gas insulated switchgear, the disconnecting device opens and closes the charging current and the bus loop current to generate an arc when the current is opened and closed.

Related prior arts are Korean Utility Model No. 20-0413970 (registered on Apr. 7, 2006) 'Insulation Guide for Gaseous Insulation Switchgear and Ground Insulating Gates'.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problem that the position of an arc generated when a line charging current is opened or closed in a disconnecting unit can not be guided to a desired position.

Another object of the present invention is to prevent deterioration of insulation performance by preventing the arc position from moving to the movable portion and the fixed portion shield portion in addition to the movable portion and the fixed portion arc contact.

The present invention relates to a movable part having an arc contact at a center thereof and having an annular movable main contact point spaced apart from the movable arc contact, a fixed station arc contact connected to the movable part arc contact, A disconnector of a gas insulated switchgear comprising a fixed portion having a fixed main contact, the disconnector comprising: a movable portion auxiliary arc contact provided along the periphery of the movable portion arc contact; and a movable portion auxiliary arc contact resiliently And a movable portion arc shield provided with an elastic support for supporting the movable portion arc shield.

And the movable part auxiliary arc contact is disconnected from the fixed part arc contact before the movable part arc contact when the disconnecting switch is opened.

Preferably, the movable part auxiliary arc contact is energized with the movable part arc contact. To this end, the movable part auxiliary arc contact may be energized with the movable part arc contact through the elastic supporter, or the movable part auxiliary arc contact may be separately The movable arc contact can be energized through the conductive line.

The movable part auxiliary arc contact may be divided into a plurality of parts.

At this time, the elastic supporter may have a coil shape surrounding the movable part arc contact, and the movable part auxiliary arc contacts may be connected to each other by a connection member.

The present invention provides an arc shield at the breaker arc contact to reduce an arc-induced breakdown phenomenon that may occur upon opening and closing a breaker charging current, thereby improving the reliability of the power system.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the configuration of a disconnecting device of a general gas insulated switchgear,
FIGS. 2 and 3 are views showing the structure of a disconnecting switch with improved opening and closing performance during charging current opening and closing according to an embodiment of the present invention
4 is a view showing the structure of an arc shield according to the first embodiment of the present invention,
5 is a view showing the structure of an arc shield according to the first embodiment of the present invention,
6 is a view showing a structure of an arc shield according to the first embodiment of the present invention.

Hereinafter, a disconnecting switch having improved opening and closing performance during charge current switching according to an embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 1 shows the configuration of a disconnecting device of a general gas insulated switchgear.

As shown in the figure, when the movable part is moved in order to switch the disconnecting device from the open state to the closed state, the moving part arc contact 14 and the movable part main contact 12 contact the fixed part 20 according to the movement of the movable part 10, And gradually approaches the fixed-end main contact 26 and the fixed-end arc contact 24 of the fixed-

The arc is generated at the movable arc contact 14 and the fixed arc contact 24 when the movable part 10 moves continuously to switch to the closed state and becomes an inter-pole insulation breakdown point.

1, since the arc generating portion of the movable arc contact 14 is narrow and the fixed-portion arc contact 24 is not of a shape that can be focused on the electric field more than the fixed main contact 26, The generation site does not occur only between the desired arc contacts 14 and 24 but proceeds to the fixed main contact 22, the fixed shield 26, and the tank, thereby causing a problem of deteriorating the insulation performance.

FIGS. 2 and 3 are views showing the structure of a disconnecting switch having improved opening and closing performance during charge current switching according to an embodiment of the present invention. FIG. 2 shows a state when the switch is opened. will be.

As shown in the drawing, the disconnecting device according to the embodiment of the present invention is characterized in that the movable arc shield 100 is provided around the movable arc contact 14.

The movable arc shield 100 includes an auxiliary arc contact 110 provided along the periphery of the movable arc contact 14 and an elastic support 120 for elastically supporting the auxiliary arc contact 110 along the opening and closing direction. .

The movable arc shield 100 has an effect of enlarging the conductive area of the movable arc contact 14 so that the arc can be generated only between the movable arc contact 14 and the fixed arc contact 24 Role. That is, inducing the arc generating part to the arc contact reduces the problem that arcing occurs in the main contact or the shield.

The movable arc contact 100 has a structure in which the auxiliary arc contact 110 is resiliently supported by the elastic supporter 120 so that contact between the arc contacts can be smoothly performed when the disconnector is closed. Therefore, the auxiliary arc contact 110 is pushed into the rear of the movable arc contact 14 during the closing operation, so that the contact between the movable arc contact 14 and the fixed station arc contact 24 is not hindered.

The movable arc shield 100 is moved to the position surrounding the movable arc contact 14 by the restoration of the elastic supporter at the time when the movable arc contact 14 and the fixed station arc contact 24 are separated from each other at the disconnecting time, A wider conductive area is formed in the case where only the arc contact 14 is provided, which also has the effect of alleviating the electric field concentration phenomenon occurring in the disconnecting pole gaps.

It is also preferable that the movable part auxiliary arc contact 110 is separated from the fixed part arc contact 24 before the movable part arc contact 14 at the time of opening. It is possible to slow the arc generation time and to further localize the arc generation region between the arc contacts.

Auxiliary arcing contact 110 of the movable arc shield 100 is preferably energized and the moving part arcing contact (14).

The movable arc contact 14 and the auxiliary arc contact 110 may be in direct contact with each other but may be formed by the elastic support 120 connecting the auxiliary arc contact 110 with the movable portion 10.

The elastic supporter 120 is formed of a conductive material so that the auxiliary arc contact 110 is connected to the movable portion through the elastic supporter.

Alternatively, the auxiliary arc contact 110 may be energized with the movable part by using a conductive line (not shown) separate from the elastic supporter 120.

4 is a view showing the structure of an arc shield according to the first embodiment of the present invention.

As shown in the figure, the arc shield 102 according to the present embodiment is formed in a ring shape with the auxiliary arc contact 112, and the elastic support 122 is formed in the form of a coil surrounding the periphery of the movable arc contact 14 It is.

This configuration has the advantage that the number of components is small and the assembly is simple by using a single auxiliary arc contact 112 and a single elastic support 122. [

5 is a view showing a structure of an arc shield according to a second embodiment of the present invention.

As shown in the figure, the arc shield 104 according to the second embodiment divides the auxiliary arc contact 114 into a plurality of segments, and the elastic support 124 is in the form of a coil surrounding the periphery of the movable arc contact 14 .

This configuration has the advantage that the inner surface of the individual auxiliary arc contact 114 can stably contact the movable arc contact 14 by elastic force.

6 is a view showing a structure of an arc shield according to a third embodiment of the present invention.

As shown in the figure, the arc shield 106 according to the third embodiment divides the auxiliary arc contact 116 into a plurality of segments, annularly connects the auxiliary arc contact point 116 to the connection body 130, The auxiliary arc contact of each of the elastic supporting bodies 126 is formed to support the auxiliary arc contact of each elastic supporting body 126.

The connecting body 130 provides an elastic force in a direction to narrow the interval between the auxiliary arc contacts 116 so that the inner surface of the individual auxiliary arc contact 116 is stably fixed to the movable arc contact 14 by the elastic force As shown in FIG.

In addition to this configuration, in the embodiment of FIG. 4, the ring-shaped auxiliary arc contact may be configured to support a plurality of elastic supports 126 as shown in FIG.

As described above, according to the present invention, the disconnector with improved opening and closing performance during the opening and closing of the charging current includes the arc shield for guiding the arc-generated portion to the arc contact in the periphery of the movable arc contact, So that it does not proceed. In addition, the drawing area of the arc contact is enlarged to alleviate the electric field concentration phenomenon and improve the insulation performance of the disconnecting unit.

10:
12: Main contact of movable part
14: Movable arc contact
16: Movable part shield
20:
22: Fixed main contact
24: Fixed arc contact
26: Fixed Shield
100, 102, 104, 106: arc shield
110, 112, 114, 116: Auxiliary arc contact
120, 122, 124, 126: elastic support
130:

Claims (9)

A moving part having an arc contact at the center thereof and having an annular movable main contact point spaced apart from the movable arc contact; a fixed station arc contact connected to the movable part arc contact; and a fixed station main part connected to the movable part main contact, A disconnector of a gas insulated switchgear comprising a fixed portion having a contact,
A moving part auxiliary arc contact provided along the periphery of the moving part arc contact and an elastic part for elastically supporting the movable part auxiliary arc contact along the opening and closing direction.
The method according to claim 1,
When the disconnector is open
Wherein said movable part secondary arc contact is separated from said fixed-portion arc contact prior to said movable part arc contact.
The method according to claim 1,
And the movable part auxiliary arc contact is energized with the movable part arc contact.
The method of claim 3,
Wherein the movable part auxiliary arc contact is electrically connected to the movable part arc contact via the elastic support.
The method of claim 3,
Wherein the movable part auxiliary arc contact is electrically connected to the movable part arc contact via a separate conductive line.
The method according to claim 1,
Wherein the movable part auxiliary arc contact is divided into a plurality of movable contact portions.
The method according to claim 6,
The elastic support
Wherein the movable arc contact has a coil shape surrounding the movable arc contact.
The method according to claim 6,
The movable part secondary arc contact
Wherein the gas-insulated switching device is connected to each other by a connecting body.
7. The method according to claim 1 or 6,
The elastic support
Wherein a plurality of movable arc contacts are provided around the movable arc contact.
KR1020130085316A 2013-07-19 2013-07-19 Disconnecting switch of gas insulated switchgear KR20150010369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130085316A KR20150010369A (en) 2013-07-19 2013-07-19 Disconnecting switch of gas insulated switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130085316A KR20150010369A (en) 2013-07-19 2013-07-19 Disconnecting switch of gas insulated switchgear

Publications (1)

Publication Number Publication Date
KR20150010369A true KR20150010369A (en) 2015-01-28

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KR1020130085316A KR20150010369A (en) 2013-07-19 2013-07-19 Disconnecting switch of gas insulated switchgear

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102284667B1 (en) * 2020-03-12 2021-07-30 엘에스일렉트릭(주) Gas Insulated Switchgear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102284667B1 (en) * 2020-03-12 2021-07-30 엘에스일렉트릭(주) Gas Insulated Switchgear

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