KR101036147B1 - Switching and breaking part used in switch and breaker, method for manufacturing the same, and switch and breaker having the same - Google Patents

Switching and breaking part used in switch and breaker, method for manufacturing the same, and switch and breaker having the same Download PDF

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Publication number
KR101036147B1
KR101036147B1 KR1020100062757A KR20100062757A KR101036147B1 KR 101036147 B1 KR101036147 B1 KR 101036147B1 KR 1020100062757 A KR1020100062757 A KR 1020100062757A KR 20100062757 A KR20100062757 A KR 20100062757A KR 101036147 B1 KR101036147 B1 KR 101036147B1
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KR
South Korea
Prior art keywords
vacuum interrupter
main body
main circuit
circuit terminal
silicon cover
Prior art date
Application number
KR1020100062757A
Other languages
Korean (ko)
Inventor
이기남
Original Assignee
일성이앤지(주)
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Publication date
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Priority to KR1020100062757A priority Critical patent/KR101036147B1/en
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Publication of KR101036147B1 publication Critical patent/KR101036147B1/en

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    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/6606—Terminal arrangements
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/01—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with resin casing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0358—Connections to in or out conductors
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66238—Specific bellows details
    • H01H2033/66246—Details relating to the guiding of the contact rod in vacuum switch belows

Abstract

PURPOSE: A switching and breaking part used in a switch and a breaker and a method for manufacturing the same are provided to restrict the electricity leakage by increasing the adhesion. CONSTITUTION: A main body(10) comprises a circuit terminal, a ground terminal, and an epoxy molded external circumference. A silicone cover(20) is inserted into the main body. A vacuum interrupter assembly(30) is fixed and coupled with the circuit terminal. A vacuum interrupter(32) comprises the fixed contact point and a movable contact point. A clamping bolt(33) increases the adhesive power between the vacuum interrupter and the silicone cover. One end of an insulation rod is connected to the movable contact.

Description

Opening and closing part of the switchgear, the manufacturing method thereof and the switchgear having the same {SWITCHING AND BREAKING PART USED IN SWITCH AND BREAKER, METHOD FOR MANUFACTURING THE SAME, AND SWITCH AND BREAKER HAVING THE SAME}

The present invention relates to an opening / closing breaker of the open / close circuit breaker, a method of manufacturing the same, and an open / close circuit breaker having the same, and more particularly, a vacuum interrupter separately assembled into the silicone cover by inserting a silicone cover into an epoxy molded body. By press-fitting the assembly, bolting the main circuit terminal of the main body and the vacuum interrupter assembly, and further tightening the tightening bolt in the vacuum interrupter direction from the inside of the main body, thereby suppressing electrical leakage, the press-fit process at room temperature Easy and easy to assemble and dismantle, it is possible to reuse the vacuum interrupter, and excellent electrical insulation resistance of the switchgear breaker, a manufacturing method thereof and a switchgear provided with the same.

In general, electricity having a voltage of about 154/345/765 / kV from the power plant is boosted to ultra high voltage and transmitted to the primary substation, and the electricity transmitted to the primary substation is stepped down and supplied to the secondary substation.

The electricity supplied to the secondary substation is supplied to the power receiving facilities of each consumer through a distribution system composed of overhead distribution lines and underground distribution lines, which are supplied to extra high pressure customers, high pressure customers, and low pressure customers. As the number of users of electricity use increases and the form of electricity use becomes more complicated, multi-circuit switchgear and circuit breaker for underground wiring lines are installed in individual places, and current is switched on or off as necessary.

By the way, in the case of the switchgear and the breaker according to the prior art, assembling the vacuum interrupter, busbars, shields, sensors, etc. first, and then fabricate an integral switchgear for molding all the assembly devices with epoxy. have.

However, such integral switchgear is difficult to complete the epoxy molding molding due to internal and external factors, especially about 20 to 30% when the entire device is molded with epoxy including vacuum interrupter A high mold failure rate of the mold is generated and the vacuum interrupter among the discarded devices is quite expensive, so the economic loss is considerable. In addition, even if the molding is successful, if an abnormality occurs in any part of the opening / closing cutout part, the whole part must be discarded. Therefore, enormous loss occurs in terms of resource utilization, and it is not recycled, resulting in problems such as environmental damage. Come.

In order to solve such a problem, in forming the opening and closing portion, the outer peripheral surface of the silicon-molded vacuum interrupter is separately manufactured and then press-assembled into the epoxy-molded opening and closing portion.

However, even in the case of such a prior art, since it is difficult to indent at room temperature, there is a hassle that needs to be indented after heating to about 120 degrees, and the vacuum interrupter whose outer peripheral surface is molded with silicon is separated from the inside of the opening / closing cut-off part. There is often a problem, such as the electrical leakage between the interface is not completely in close contact.

The present invention has been made to solve the above problems, an object of the present invention, by inserting a silicone cover inside the epoxy molded body, and press-fit the vacuum interrupter assembly separately assembled from the outside into the silicone cover, After bolting the main circuit terminal of the main body and the vacuum interrupter assembly, further tightening the fastening bolt in the vacuum interrupter direction from the inside of the main body, thereby preventing the vacuum interrupter assembly from being detached from the silicon cover, and the main body and the silicon Increasing the adhesion between the cover and the adhesion between the silicone cover and the vacuum interrupter to suppress the leakage of electricity, easy indentation at room temperature, reusable vacuum interrupter, the closed shield of the switchgear breaker, its manufacturing method, the system having the same To provide disposal and breakers.

Opening and closing part of the switchgear according to the present invention for achieving the above object, the main circuit terminal is provided on the upper side and the side, the ground terminal is provided on the bottom, the outer peripheral surface epoxy molding molded body; A silicon cover fitted inside the main body; And a vacuum interrupter assembly inserted into the silicon cover and bolted to the main circuit terminal of the main body, wherein the vacuum interrupter assembly includes a vacuum interrupter including a fixed contact and a movable contact; A tightening bolt fastened to a lower end of the vacuum interrupter and increasing adhesion between the main body and the silicon cover and adhesion between the silicon cover and the vacuum interrupter; And an insulating rod having one end connected to the movable contact.

At this time, the bolt fastening is tightened from the main circuit terminal in the direction of the vacuum interrupter assembly inside the main body.

The opening / closing blocking part may further include a dummy plug installed above the main circuit terminal at a position at which the bolt is fastened of the main circuit terminal provided on a side surface thereof.

According to an aspect of the present invention, there is provided a method of manufacturing an open / close block of an open / close circuit breaker, the method comprising: assembling a vacuum interrupter assembly including a vacuum interrupter including a fixed contact and a movable contact, a tightening bolt, and an insulating rod; Inserting the vacuum interrupter assembly into a silicon cover having a main circuit terminal at an upper side and a side, a ground terminal at a lower side, and an outer circumferential surface of which is fitted inside an epoxy molded body; And bolting the vacuum interrupter assembly fitted inside the silicon cover and the main circuit terminal of the main body.

Assembling the vacuum interrupter assembly, the step of tightening the tightening bolt on the lower end of the vacuum interrupter; And connecting one end of the insulating rod to the movable contact.

The fastening of the bolt may be performed by pushing the bolt from the main circuit terminal in the direction of the vacuum interrupter assembly to the inside of the main body.

After the step of fastening the bolt, by further pushing the tightening bolt in the direction of the vacuum interrupter inside the main body further to further increase the adhesion between the body and the silicon cover and the adhesion between the silicon cover and the vacuum interrupter. It is desirable to.

Switching circuit breaker according to the present invention for achieving the above object comprises a plurality of opening and closing block constituting a plurality of circuits; And a common bar that connects the plurality of open / close blocks so that the plurality of circuits are energized with each other, and connects the same phases to each other.

At this time, the main circuit terminal portion provided on the upper portion of the main body of the opening and closing cutoff portion is connected to the common bar.

As described above, the closure of the opening and closing of the circuit breaker according to the present invention, a method of manufacturing the same, the closing device and the circuit breaker having the same, the silicone cover is fitted inside the epoxy molded body, and assembled separately from the outside inside the silicone cover Press-fit the vacuum interrupter assembly, and then bolt the main circuit terminal of the main body and the vacuum interrupter assembly to prevent the vacuum interrupter assembly from detaching from the silicon cover, and the adhesion between the main body and the silicon cover and the silicone cover and the vacuum interrupter Increasing the adhesion between the liver to suppress electrical leakage, it is easy to indent at room temperature.

In addition, since the vacuum interrupter assembly including the vacuum interrupter, the tightening bolt, and the insulating rod is separately assembled from the outside, the vacuum interrupter assembly is inserted into the silicon cover and bolted to facilitate assembly and disassembly of the vacuum interrupter assembly. If a defect occurs in the silicon cover, only the expensive vacuum interrupter can be separated and reused.

In addition, tighten the tightening bolts during the assembly of the vacuum interrupter assembly, and tighten the tightening bolts again after the step of bolting the main circuit terminals of the main body and the vacuum interrupter assembly, thereby maintaining the adhesion between the body and the silicon cover and the adhesion between the silicon cover and the vacuum interrupter. By further increasing the electrical insulation strength, such as commercial frequency withstand voltage, brain impulse withstand voltage, partial discharge.

Figure 1 schematically shows an embodiment of the opening and closing block according to the present invention.
Figure 2 schematically illustrates one embodiment of a vacuum interrupter assembly according to the present invention.
Figure 3 schematically shows a front perspective view of an embodiment of the breaker according to the invention.
Figure 4 schematically shows a rear perspective view of an embodiment of the open / close circuit breaker according to the present invention.
Figure 5 schematically shows an embodiment of a common bar according to the present invention.
6 schematically illustrates another embodiment of a common bar according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to the following Examples.

Figure 1 schematically shows an embodiment of the opening and closing block according to the present invention.

Referring to FIG. 1, the opening and closing block 100 includes a main body 10, a silicon cover 20, and a vacuum interrupter assembly 30.

The main circuit terminals 12 and 14 are provided on the upper and side surfaces of the main body 10, the ground terminals 16 are provided on the lower side, and the outer circumferential surface of the main body 10 is formed of an epoxy molding 18.

The silicon cover 20 is fitted inside the main body 10.

The vacuum interrupter assembly 30 is fitted inside the silicon cover 20 and is fastened to the main circuit terminals 12 and 14 of the main body 10 by bolts 50. The bolt 50 is tightened from the main circuit terminals 12 and 14 toward the vacuum interrupter assembly 30 inside the main body 10. In the present invention, the vacuum interrupter assembly 30 and the main circuit terminals 12 and 14 of the main body 10 are fastened by bolts 50, so that the vacuum interrupter assembly 30 is separated from the silicon cover 20. It can be prevented, and by increasing the adhesion between the silicon cover 20 and the vacuum interrupter assembly 30 and the adhesion between the silicon cover 20 and the main body 10 can suppress electrical leakage.

The opening and closing block 100 further includes a dummy plug 40 provided above the main circuit terminal 14 at the position where the bolt 50 is fastened to the main circuit terminal 14 on the side. The dummy plug 40 is made of an insulating silicone rubber material.

Figure 2 schematically illustrates one embodiment of a vacuum interrupter assembly according to the present invention.

1 and 2, the vacuum interrupter assembly 30 includes a vacuum interrupter 32 including a fixed contact (not shown) and a movable contact 31, and a lower end (movable contact 31) of the vacuum interrupter 32. ), A fastening bolt 33 fastened to the sliding contact 36), which is a contact portion of the movable contact 31, a spacer 34 positioned above the sliding contact 36, and one end of the movable contact. The insulating rod 35 connected to the 31 is comprised. The tightening bolt 33 has a threaded outer peripheral surface thereof. In this embodiment, a spacer 34 over the sliding contact 36 is included, but in an alternative embodiment, the spacer 34 may be omitted.

In the present invention, after assembling the vacuum interrupter assembly separately from the outside it is inserted into the silicon cover, so that the assembly and disassembly is easy. In addition, since the bolt fastening is made after press-fitting into the silicon cover of the vacuum interrupter assembly, when a failure occurs in the epoxy molded body or the silicone cover, only the expensive vacuum interrupter can be separated and reused.

Next, the manufacturing process of the opening and closing block according to the present invention will be described with reference to FIG.

The manufacturing process of the opening / closing blocking part is largely three steps, assembling the vacuum interrupter assembly, inserting the vacuum interrupter assembly into the silicon cover, and bolting the main circuit terminal of the main circuit terminal of the main body and the main body of the vacuum interrupter assembly. Fastening.

First, referring to the process of assembling the vacuum interrupter assembly, the tightening bolt 33 is tightened to the lower end of the vacuum interrupter 32 (the movable contact 31 and the sliding contact 36 which is the contact portion of the movable contact 31). . Then, one end of the insulating rod 35 is connected to the movable contact 31 to complete the assembly process of the vacuum interrupter assembly 30.

The vacuum interrupter assembly 30 thus assembled is press-fitted into the silicon cover 20 in which the outer circumferential surface is fitted inside the main body 10 in which the epoxy molding is formed. 2, the vacuum interrupter assembly fitted to the right side of the main body is for the main circuit, and the vacuum interrupter assembly inserted to the left side of the main body is for the ground circuit.

Thereafter, inside the main body 10, the bolt 50 is pushed and tightened from the main circuit terminals 12 and 14 toward the vacuum interrupter assembly 30. Thereby, the manufacturing process of the opening-closing cutout part which concerns on this invention is completed.

According to the present invention, a vacuum interrupter assembly including a vacuum interrupter, a tightening bolt and an insulating rod is separately assembled from the outside, and then inserted into the silicon cover and fastened with a bolt, so that the assembly and disassembly is easy, and the epoxy molding When a defect occurs in the molded body or the silicone cover, only the expensive vacuum interrupter can be separated and reused. In addition, in the prior art, the pressurization process was not performed because the pressurization was not easy in pressurizing the vacuum interrupter having the outer circumferential surface molded into silicon into the main body. However, in the present invention, since the vacuum interrupter assembly is inserted into the silicon cover after the silicon cover is inserted into the main body, an easy indentation process is possible even at room temperature.

In addition, by inserting the vacuum interrupter assembly into the silicon cover and then tightening the main circuit terminal of the main body and the vacuum interrupter assembly with bolts, the adhesion between the main body and the silicon cover and the adhesion between the silicon cover and the vacuum interrupter assembly can be increased to suppress electrical leakage. And prevent the vacuum interrupter assembly from being detached from the silicone cover.

In another alternative embodiment, the method may further include a step of pushing the tightening bolt in the direction of the vacuum interrupter from the inside of the main body after all three processes are performed, that is, after the fastening of the bolt. In the assembling of the vacuum interrupter assembly, the tightening bolt 33 is tightened to the lower end of the vacuum interrupter 32, but after the tightening of the bolt, the tightening bolt is pushed in the direction of the vacuum interrupter once more to tighten between the main body and the silicon cover. The adhesion and adhesion between the silicon cover and the vacuum interrupter assembly can be further increased.

3 and 4 schematically show a front perspective view and a rear perspective view, respectively, of an embodiment of the open / close circuit breaker according to the present invention. Figure 5 schematically shows an embodiment of a common bar according to the present invention. 6 schematically illustrates another embodiment of a common bar according to the present invention.

3 and 4, the open / close circuit breaker 300 according to the present invention includes a common bar 200 connecting the plurality of open / close blocks 100 and the plurality of open / close blocks 100. In the present embodiment, the plurality of open / close blocks 100 constitute three circuits of three phases (R, S, and T phases). That is, the first three open / close blocks 100 constitute one circuit on R, S, and T, and the next three open / close blocks 100 constitute two circuits on R, S, and T, and the next three open / close blocks are: 100 constitutes three circuits on R, S, and T, and the last three open / close blocks 100 form four circuits on R, S, and T. In the present embodiment, a three-phase four circuit has been described, but the present invention is not necessarily limited thereto.

The common bar 200 connects the plurality of open / close blocks 100 to each other so that circuits configured by the plurality of open / close blocks 100 are energized with each other. At this time, each common bar 200 connects the open / close block 100 corresponding to the same phase of each circuit. Specifically, the common bar 200 located at the bottom of FIG. 4 connects the opening / closing blocking part 100 corresponding to the R phase to each other, and the common bar 200 located in the middle corresponds to the S phase. The open / close block 100 is connected to each other, and the common bar 200 located at the top connects the open / close block 100 corresponding to the T phase to each other. At this time, the common bar 200 is connected to the main circuit terminal portion provided on the upper portion of the main body of the opening and closing block 100. That is, the opening and closing block 100 is connected to the common bar 200 upside down.

The common bar 200 will be described in detail.

Referring to FIG. 5, the common bar 200 located at the top and bottom of the opening and closing block 100 is illustrated. The common bar 200 of FIG. 5 is a joint part 220 in which opening and closing connection portions 210 to which main circuit terminal portions of the opening and closing cutoff portion 100 are connected, and portions extending downward from the side of each opening and closing connection portion 210 are connected to each other. ). As shown in FIG. 4, the common bar of FIG. 5 may connect the opening / closing block in a state in which the joint part 220 is placed upward, or connect the opening / closing block in the state in which the joint part 220 is downward. It may be.

Referring to FIG. 6, the common bar 200 located in the middle of the connection of the opening and closing block 100 is illustrated. The common bar 200 of FIG. 6 is configured to include an opening and closing connection part 210 and a joint 220 similarly to the common bar 200 of FIG. 5. However, the joint part 220 of FIG. 6 is different from the joint part 220 of FIG. 5 in that portions extending straight from the sides of each opening and closing connection part 210 are connected to each other.

While specific embodiments of the present invention have been described above, the present invention is not limited to the above-described specific embodiments, and the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Anyone of ordinary skill in the art can make various modifications, as well as such modifications are within the scope of the claims.

10: main body 12, 14: main circuit terminal
16: ground terminal 18: epoxy molding
20: silicon cover 30: vacuum interrupter assembly
31: movable contact 32: vacuum interrupter
33: Tightening bolt 34: Spacer
35: insulated rod 36: sliding contact
40: dummy plug 50: bolt
100: opening and closing block 200: common bar
210: opening and closing connection portion 220: joint portion

Claims (9)

A main circuit terminal at upper and side surfaces, a ground terminal at a lower portion thereof, and an outer circumferential surface of which is formed by epoxy molding;
A silicon cover fitted inside the main body; And
And a vacuum interrupter assembly inserted into the silicon cover and bolted to a main circuit terminal of the main body.
The vacuum interrupter assembly,
A vacuum interrupter comprising a fixed contact and a movable contact;
A tightening bolt fastened to a lower end of the vacuum interrupter and increasing adhesion between the main body and the silicon cover and adhesion between the silicon cover and the vacuum interrupter; And
An insulation rod having one end connected to the movable contact;
The bolt fastening is the opening and closing of the circuit breaker, characterized in that the tightening in the main circuit terminal in the direction of the vacuum interrupter assembly. delete The method according to claim 1,
And a dummy plug provided to an upper side of the main circuit terminal at a position at which the bolt is fastened of the main circuit terminal provided on a side of the main circuit terminal. Assembling a vacuum interrupter assembly having a vacuum interrupter including a fixed contact and a movable contact, a tightening bolt, and an insulating rod;
Inserting the vacuum interrupter assembly into a silicon cover having a main circuit terminal at an upper side and a side, a ground terminal at a lower side, and an outer circumferential surface of which is fitted inside an epoxy molded body; And
And bolting the vacuum interrupter assembly inserted into the silicon cover and the main circuit terminal of the main body. 2. The method of claim 4, wherein
Assembling the vacuum interrupter assembly,
Tightening the tightening bolt at the lower end of the vacuum interrupter; And
And connecting one end of the insulating rod to the movable contact. The method of claim 4, wherein
The fastening of the bolt may include tightening the bolt from the main circuit terminal to the vacuum interrupter assembly in the main body. The method of claim 4, wherein
After the step of fastening the bolts, further increasing the adhesion between the body and the silicon cover and the adhesion between the silicon cover and the vacuum interrupter by further pushing and tightening the tightening bolt in the vacuum interrupter direction inside the body. The manufacturing method of the open / close block of the open / close circuit breaker. An opening / closing blocking unit according to claim 1 or 3, comprising a plurality of circuits; And
And a common bar that connects the plurality of open / close blocks so that the plurality of circuits are energized with each other, and connects the same phases to each other. 9. The circuit breaker of claim 8, wherein a main circuit terminal portion provided on an upper portion of the main body of the circuit breaker is connected to the common bar.
KR1020100062757A 2010-06-30 2010-06-30 Switching and breaking part used in switch and breaker, method for manufacturing the same, and switch and breaker having the same KR101036147B1 (en)

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KR1020100062757A KR101036147B1 (en) 2010-06-30 2010-06-30 Switching and breaking part used in switch and breaker, method for manufacturing the same, and switch and breaker having the same

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Application Number Priority Date Filing Date Title
KR1020100062757A KR101036147B1 (en) 2010-06-30 2010-06-30 Switching and breaking part used in switch and breaker, method for manufacturing the same, and switch and breaker having the same

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101240078B1 (en) * 2011-05-30 2013-03-06 장기봉 Vacuum interrupter insulation device and method for manufacturing the same
CN110112032A (en) * 2019-05-30 2019-08-09 国网江苏省电力有限公司东海县供电分公司 The arc-extinction device of livewire work

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100888541B1 (en) * 2008-07-21 2009-03-11 중원전기 주식회사 Epoxy mold insulated multi switch and switchgear for underground power line
KR20090080643A (en) * 2008-01-22 2009-07-27 이철호 Polymer insulated multi switch for underground power line
KR20100007231A (en) * 2008-07-11 2010-01-22 엘에스산전 주식회사 Switching mechanism for solid insulated switchgear
JP2010044928A (en) 2008-08-12 2010-02-25 Hitachi Ltd Vacuum switchgear

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090080643A (en) * 2008-01-22 2009-07-27 이철호 Polymer insulated multi switch for underground power line
KR20100007231A (en) * 2008-07-11 2010-01-22 엘에스산전 주식회사 Switching mechanism for solid insulated switchgear
KR100888541B1 (en) * 2008-07-21 2009-03-11 중원전기 주식회사 Epoxy mold insulated multi switch and switchgear for underground power line
JP2010044928A (en) 2008-08-12 2010-02-25 Hitachi Ltd Vacuum switchgear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101240078B1 (en) * 2011-05-30 2013-03-06 장기봉 Vacuum interrupter insulation device and method for manufacturing the same
CN110112032A (en) * 2019-05-30 2019-08-09 国网江苏省电力有限公司东海县供电分公司 The arc-extinction device of livewire work
CN110112032B (en) * 2019-05-30 2023-12-05 国网江苏省电力有限公司东海县供电分公司 Arc extinguishing device for live working

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