KR101158656B1 - Extinguishing device of gas insulated circuit breaker - Google Patents

Extinguishing device of gas insulated circuit breaker Download PDF

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Publication number
KR101158656B1
KR101158656B1 KR1020100140688A KR20100140688A KR101158656B1 KR 101158656 B1 KR101158656 B1 KR 101158656B1 KR 1020100140688 A KR1020100140688 A KR 1020100140688A KR 20100140688 A KR20100140688 A KR 20100140688A KR 101158656 B1 KR101158656 B1 KR 101158656B1
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KR
South Korea
Prior art keywords
pressure discharge
support body
side support
gas
pressure
Prior art date
Application number
KR1020100140688A
Other languages
Korean (ko)
Inventor
김덕래
Original Assignee
엘에스산전 주식회사
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Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR1020100140688A priority Critical patent/KR101158656B1/en
Application granted granted Critical
Publication of KR101158656B1 publication Critical patent/KR101158656B1/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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/904—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism characterised by the transmission between operating mechanism and piston or movable contact
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate

Abstract

PURPOSE: An arc-extinguishing unit of a gas insulated circuit breaker is provided to prevent dielectric breakdown by partially discharging heated gas when a certain pressure is formed in a cooling room. CONSTITUTION: A fixed electrode part(100) includes a fixed electrode rod(120). A moving electrode part(200) faces the fixed electrode part. The moving electrode part includes a moving electrode rod(220). A pressure outlet includes a pressure discharging hole and a switching valve opening and closing the pressure discharging hole. The pressure discharging hole is included at least one of a fixed side supporting body(110) or a moving side supporting body(210).

Description

Exhaust of gas insulated breakers {EXTINGUISHING DEVICE OF GAS INSULATED CIRCUIT BREAKER}

The present invention relates to a subdivision of a gas insulated circuit breaker, and more particularly, to a gas insulated circuit breaker having a pressure discharge function capable of suppressing an excessive pressure rise in a cooling chamber generated by arc energy generated during current interruption. It's about a sub-unit.

In general, a gas insulated switchgear or gas insulated breaker is installed on an electric line to safely shut off the current when an artificial current is opened or closed in normal use or an accident current such as a ground fault or short circuit occurs. An electrical device that protects the appliance. In such a gas insulated switchgear, SOHO gas (for example, sulfur hexafluoride (SF 6 ) gas) having excellent insulation force compressed in the compression chamber when the switch is tripped. ) Is sprayed through the nozzle to extinguish the arc generated during trip operation.

Figure 1 schematically shows the arc of a conventional gas insulated circuit breaker.

The fixed electrode part 10 has a fixed electrode contact 11 protruding from the inside to the outside. And the movable electrode part 20 arrange | positioned facing the fixed electrode part 10 has the movable electrode contact 21 which reciprocates by a piston. Here, the movable electrode contact 21 has a structure in which the fixed electrode contact 11 is fitted and can be contacted.

In addition, a compression chamber 20a in which the piston 30 is located and a cooling chamber 20b partitioned from the compression chamber 20a are formed in the movable electrode part 20.

In addition, the fixed electrode unit 10 and the movable electrode unit 20 are provided inside the enclosure 40.

In the related art, as the rearward movement of the piston 30 is manipulated as shown in FIG. 1, the movable electrode contactor 21 and the fixed electrode contactor 11 are separated from each other to generate an arc. The expansion energy by this arc expands along the arrow, and the insulating gas in the compression chamber 20b can be compressed to block the current.

When the current reaches zero and the compressed gas is blown out through the space between the movable electrode contact 21 and the fixed electrode contact 11, the inside of the compression chamber 20a and the divided cooling chamber 20b are compressed. Before the gas in the chamber is ejected, the pressure rises above a certain level by the ejection of the expansion energy of the arc. Thereby, when the pressure of the cooling chamber 20b raises excessively, it can inhibit that the gas in the compression chamber 20a blows out.

Therefore, conventionally, as the pressure inside the cooling chamber 20b is excessively increased at the time when the arc is generated as described above, the operation force of the manipulator of the apparatus is lowered by inhibiting the gas ejection action inside the compression chamber 20a. There is a problem.

In addition, if the internal pressure of the cooling chamber 20b is excessively increased, the amount of thermal gas blown into the enclosure 40 is increased to cause breakdown of the insulation to the enclosure 40 due to the increased thermal gas. have.

The present invention has been made to solve the above problems, an object of the present invention is a gas having a pressure discharge function that can suppress excessive pressure rise inside the cooling chamber generated by the arc energy generated when the current is interrupted In the provision of a subdivision of an insulated circuit breaker.

In a preferred aspect, the present invention provides a subtracting part of a gas insulated circuit breaker having a pressure relief function.

The arc-extinguishing part of the gas insulated circuit breaker having the pressure release function has a fixed electrode part having a fixed electrode rod having a predetermined length; A movable electrode portion disposed to face the fixed electrode portion, the movable electrode portion having a movable electrode rod reciprocating to selectively engage with the high electrode electrode rod; And a pressure discharge part discharging the pressure due to the arc generated when the fixed electrode rod and the movable electrode rod are separated from each other to the outside for a predetermined time.

Here, the fixed electrode unit includes a cylindrical fixed side support body having one side opened, a partition wall formed inside the fixed side support body, and the fixed electrode rod protruding from the partition wall to the opening side,

The movable electrode part is provided to surround the outer electrode of the movable electrode rod and the movable electrode rod having a predetermined length and forming a cylindrical shape so that the fixed electrode rod is inserted and separated, and is in communication with an end side space of the movable electrode rod. A piston having one end opened so that a predetermined space is formed therein, a gas moving tube installed at one end of the piston to insert and exit the fixed electrode rod, and an injection hole through which the gas is ejected, and the movable electrode rod penetrates And a movable side support body having one end opening so that the outer circumference of the piston is fitted, a compression chamber in which the piston is positioned and flow therein, a flow passage communicating with the compression chamber, and a cooling chamber partitioned from the compression chamber. desirable.

Here, the pressure discharge unit may be installed in any one of the fixed electrode unit or the movable electrode unit.

When the pressure discharge portion is installed in the movable electrode portion, the pressure discharge portion is provided with a pressure discharge hole drilled in the movable side support body to expose the compression chamber to the outside, and is installed in the movable side support body to the pressure chamber. It is preferable to include an on-off valve for opening and closing the pressure discharge hole according to the level of the gas pressure formed therein.

When the pressure discharge unit is installed in the fixed electrode unit, the pressure discharge unit may include a pressure discharge hole drilled in the fixed side support body to expose the internal space of the fixed side support body partitioned by the partition wall to the outside. And a second opening / closing valve installed on the fixed side support body to open and close the pressure discharge hole according to the level of the gas pressure formed in the internal space of the fixed side support body partitioned by the partition wall.

On the other hand, the pressure discharge portion may be provided in each of the fixed electrode portion and the movable electrode portion.

When installed in each of the fixed electrode and the movable electrode, the pressure discharge portion includes a first pressure discharge portion and a second pressure discharge portion.

Here, the first pressure discharge portion is a pressure discharge hole perforated in the movable side support body to expose the compression chamber to the outside, and the level of the gas pressure is provided in the movable side support body formed in the pressure chamber And an on / off valve for opening and closing the first pressure discharge hole,

The second pressure discharge part is provided with another pressure discharge hole perforated in the fixed side support body to expose the inner space of the fixed side support body partitioned by the partition wall to the fixed side support body, and to the partition wall. It is preferable to have another on-off valve for opening and closing the other pressure discharge hole according to the level of the gas pressure formed in the inner space of the fixed side support body partitioned.

Therefore, the pressure discharge unit in the present invention may be installed on any one of the fixed electrode portion and the movable electrode portion, or both may be installed.

On the other hand, the opening and closing valve is provided with an elastic member provided in the outer peripheral region of the pressure discharge hole and the opening and closing plate for opening and closing the pressure discharge hole provided at the end of the elastic member, the elastic member, the opening and closing plate It is desirable to have a certain elasticity to compress and relax according to the level of gas pressure applied to the.

The present invention has the effect of suppressing excessive pressure rise in the cooling chamber generated by the arc energy generated during the current interruption.

In addition, when the predetermined pressure is formed inside the cooling chamber, the thermal gas is partially ejected, thereby preventing the breakdown of the insulation into the enclosure due to the temporary excessive ejection of the thermal gas.

1 is a cross-sectional view showing the arc generation and the flow of gas in the arc of the conventional gas insulated circuit breaker.
2 is a cross-sectional view showing the arc of a gas insulated circuit breaker according to a preferred embodiment of the present invention.
FIG. 3 is a cross-sectional view illustrating the arc of a gas insulated circuit breaker in a state in which the pressure discharge hole of FIG. 2 is opened.
FIG. 4 is a cross-sectional view illustrating the arc of the gas insulated circuit breaker in a state in which the pressure discharge hole of FIG. 3 is closed.

Hereinafter, with reference to the accompanying drawings, it will be described the configuration of the extinguishing portion of the gas insulated circuit breaker of the present invention.

Referring to Figure 2, the arc extinguishing portion of the gas insulated circuit breaker having a pressure discharge function of the present invention is largely fixed electrode portion 100, the movable electrode portion 200 disposed to face the fixed electrode portion 100, and the fixed electrode The pressure discharge unit 400 and 500 discharge the pressure due to the arc generated at the time of contact separation between the fixed electrode rod 120 of the unit 100 and the movable electrode rod 220 of the movable electrode unit 200.

The fixed electrode part 100 includes a cylindrical fixed side support body 110 having one side opened, a first partition 111 installed in an inner space of the fixed side support body 110, and the first partition wall. It is composed of a fixed electrode rod 120 extending from the central portion of the 111 toward the opening of the fixed side support body 110. Here, the end of the fixed electrode rod 120 is preferably formed round.

The movable electrode portion 200 is a cylindrical movable that is disposed to penetrate along a central axis of the movable side support body 210, the piston 230, and the piston 230 and the movable side support body 210. The electrode rod 220 and the gas moving tube 240 provided at the end of the piston 230.

Here, the movable side support body 210 has a cylindrical shape, one side of which is opened and a predetermined space is formed therein, a second partition 211 is formed therein, and a through hole is formed in the second partition 211. Fields 211a are formed. Therefore, the cooling chamber 202 and the compression chamber 201 may be partitioned by the second partition 211a. The compression chamber 201 is located at the opening side of the movable side support body 210, and the cooling chamber 202 is located opposite the compression chamber 201. Accordingly, the cooling chamber 202 and the compression chamber 201 may form a flow path that is passed through each other by the through holes 211a.

In addition, the piston 230 has a piston rod 231 of a predetermined length. The piston rod 231 passes through the central portion of the second partition 211 and the movable side support body 210. At the open end of the piston 230, a gas moving tube 240 of a predetermined length is installed.

The movable electrode rod 220 is disposed in the piston 230, and the movable electrode rod 220 is connected to the piston rod 231.

Here, the movable electrode rod 220 and the internal space of the piston 230 may be exposed to the outside through one end of the gas moving tube 240.

In addition, the outer circumference of the piston 230 may be in close contact with the opening side end of the movable side support body 210.

Therefore, when the piston rod 231 receives the operating force from the outside and reciprocates along the central axis, the movable electrode rod 220 disposed inside the piston 230 and connected to the piston rod 231 also reciprocates along the center axis. I can move it.

In addition, the gas moving tube 240 installed at one end of the opening of the piston 230 has a predetermined length, and the fixed electrode rod 120 is inserted and separated, and an injection hole 241 through which gas is ejected is formed.

The pressure discharge part according to the preferred embodiment of the present invention may be installed in the movable electrode part 200. This is called the first pressure discharge unit 400.

Referring to FIG. 2, the first pressure discharge part 400 includes first pressure discharge holes 410 formed in the movable side support body 210. The first pressure discharge holes 410 are holes for exposing the cooling chamber 202 to the outside.

The first pressure discharge part 400 maintains the first pressure discharge holes 410 in an open state, and has first opening / closing valves 420 that close when a predetermined external pressure is applied. The external pressure is an external pressure acting on the first opening / closing plate 422 of the first opening / closing valve 420 and is substantially an internal pressure inside the movable side support body 210.

The first opening / closing valve 420 may be installed inside the movable side support body 210, that is, inside the cooling chamber 202. The first opening / closing valve 420 may include a first elastic member 421 having a predetermined elasticity installed at an inner circumference of the cooling chamber 202 so as to surround the first pressure discharge hole 410, and the first elasticity. It is installed at the end of the member 421 and consists of a first opening and closing plate 422 having an area capable of opening and closing the first pressure discharge hole 410. Here, the first elastic member 421 is in a state in which the first opening and closing plate 422 is spaced apart from the first pressure discharge hole 410, a predetermined pressure is applied to the outer peripheral surface of the first opening and closing plate 422 When applied, it is preferable to operate to close the first pressure discharge hole 410. Here, the outer circumferential surface of the first opening and closing plate 422 is a surface which is located inside the movable side support body 210 and is subjected to the action of the internal pressure formed in the movable side support body 210.

In particular, the first pressure discharge hole 410 and the first opening / closing valve 420 may be provided at a predetermined distance from an inner wall of the cooling chamber 202 on the side facing the second partition 211.

In addition, the first elastic member 421 may use an elastic spring having a predetermined elastic modulus, or may use another member such as a sponge having heat resistance. Herein, all of the first elastic members 421 may be adopted as long as they have a function of the first elastic member 421 in addition to the sponge.

Next, referring to Figures 2 to 3b, it will be described the operation of the extinguishing unit according to a preferred embodiment of the present invention configured as described above.

2 illustrates a state in which a fixed electrode rod is inserted into and contacted with the movable electrode rod. That is, it shows a state in which the current in the breaker is conducted, and FIGS. 3A and 3B show a process in which the movable electrode rod and the fixed electrode rod are separated from each other in order to cut off the current.

Referring to FIG. 3A, the movable electrode rod 220 may move along the central axis c of the movable side support body 210 in conjunction with the piston 230 moving backward.

In this case, as the movable electrode rod 220 is moved backward, the fixed electrode rod 120 may be separated from the inside of the movable electrode rod 120. At this time, an arc is generated between the arc contacts, the fixed electrode rod 120 and the movable electrode rod 220 at an initial stage.

As such, the gas generated by the arc generation flows into the compression chamber 201 and the cooling chamber 202 along the inner space of the piston 230 surrounding the outer circumference of the movable electrode rod 220. Accordingly, the pressure may increase as the gas flows into the cooling chamber 202 at the initial stage of arc generation.

In addition, the gas flowing into the cooling chamber 202 flows outward along the inner wall of the cooling chamber 202 facing the second partition 211 as illustrated in FIG. 3A, and thus, the first elastic member 421. A predetermined amount of gas is discharged through the first pressure discharge hole 410 opened by the.

Therefore, in the present invention, it is possible to suppress the sudden increase in the pressure inside the cooling chamber at the initial stage of arc generation through the pressure discharge to the first pressure discharge hole 410.

3B, when the movable electrode rod 220 is further separated from the fixed electrode rod 210 by a predetermined distance, the piston 230 is further moved to the second partition 211 and the compression chamber 201 is provided. Due to the compression of the gas present in the internal space of the piston 230 may be injected to the outside of the fixed electrode rod 120 through the injection port 241 of the gas movement pipe 240.

At the same time, the gas flowing along the outer inner wall of the cooling chamber 201 flows by forming a constant flow pressure to the outside along a path spaced apart from the inner wall of the cooling chamber 202 by a predetermined distance.

In this case, the flow of the gas provides an external pressure directly to the outer surface of the first opening and closing plate 422 which maintains the state of opening the first pressure discharge holes 410, and thus, the first elastic member 421. Is contracted, and the first opening and closing plate 422 connected to the end of the contracted first elastic member 421 may close the first pressure discharge holes 410.

That is, as shown in FIG. 3B, at a certain time when the gas in the compression chamber 201 is injected to the gap in order to cut off the current, the discharge of the heat gas discharged into the cooling chamber 202 is suppressed, Insulation breakdown to the enclosure 40 can be suppressed.

On the other hand, the pressure discharge portion described in the present invention may be installed only in the fixed electrode portion 100. This is called the second pressure discharge unit 500, and since the second pressure discharge unit 500 is substantially the same as the configuration of the first pressure discharge unit 400 mentioned above, a description of the configuration will be omitted below. Let's go. here. Reference numeral '510' is a second pressure discharge hole, '520' is a second opening and closing valve, '521' is a second elastic member, and '522' is a second opening and closing plate.

In addition, the pressure discharge unit according to the present invention may be installed in both the movable electrode unit 200 and the fixed electrode unit 100. In this case, the first pressure discharge unit 400 and the second pressure discharge unit 500 mentioned above are installed at the same time, the first pressure discharge unit 400 is the second pressure to the movable electrode unit 200 The discharge part 500 may be installed in the fixed electrode part 100.

100: fixed electrode portion
110: fixed side support body
120: fixed electrode rod
200: movable electrode portion
210: movable side support body
220: movable electrode rod
230: piston
231: Piston Rod
240: gas moving tube
400: first pressure outlet
410: first pressure discharge hole
420: first opening and closing valve
421: first elastic member
422: first opening and closing board
500: second pressure outlet
510: second pressure discharge hole
520: second opening and closing valve
521 second elastic member
522: the second opening and closing board

Claims (8)

A fixed electrode part having a fixed electrode rod projecting inside the cylindrical fixed side support body;
A movable electrode part disposed to face the fixed electrode part, the movable electrode part having a movable electrode rod reciprocally movable within the movable side support body to be in contact with the fixed electrode rod;
And a pressure discharge part including a pressure discharge hole provided in at least one of the fixed side support body or the movable side support body and an on / off valve for opening and closing the pressure discharge hole.
The pressure discharge unit discharges gas generated by an arc generated when the contact between the fixed electrode rod and the movable electrode rod is separated for a predetermined time to the outside through the pressure discharge hole by opening and closing the open / close valve. Fire protection section of the gas insulated circuit breaker. delete delete The method of claim 1,
The fixed electrode unit further includes a partition wall formed inside the fixed side support body, wherein the fixed electrode rod protrudes from the partition wall,
The movable electrode portion is provided to surround the outer periphery of the movable electrode rod, the piston is open at one end to communicate with the end side space of the movable electrode rod and a predetermined space formed therein, and is installed at one end of the piston to fix the A gas moving tube into which an electrode rod is inserted and removed, and a gas injection hole is formed; a compression chamber through which the movable electrode rod penetrates and the outer periphery of the piston is fitted, and the piston is positioned and moved therein; And a cooling chamber having a flow passage communicating with the compression chamber and partitioned from the compression chamber.
Reservoir of gas insulated breaker. The method of claim 4, wherein
When the pressure discharge portion is provided in the movable side support body,
The pressure discharge hole is formed in the movable side support body so as to communicate the compression chamber with the outside,
The on-off valve of the gas insulated circuit breaker, it characterized in that it can selectively open and close the pressure discharge hole in accordance with the pressure of the gas formed in the cooling chamber. The method of claim 4, wherein
When the pressure discharge portion is provided in the fixed side support body,
The pressure discharge hole is formed in the fixed side support body to expose the internal space of the fixed side support body to the outside,
The on-off valve of the gas insulated circuit breaker, it characterized in that the pressure discharge hole can be selectively opened and closed according to the pressure of the gas formed in the inner space of the fixed side support body partitioned by the partition wall. delete The method of claim 1,
The on-off valve,
An elastic member is installed around the pressure discharge hole, and the opening and closing plate is provided at the end of the elastic member to open and close the pressure discharge hole,
The elastic member, the arc of the gas insulated circuit breaker, characterized in that the elasticity enough to maintain the opening of the pressure discharge hole until the pressure of the gas applied to the opening and closing plate reaches a predetermined level.
KR1020100140688A 2010-12-31 2010-12-31 Extinguishing device of gas insulated circuit breaker KR101158656B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100140688A KR101158656B1 (en) 2010-12-31 2010-12-31 Extinguishing device of gas insulated circuit breaker

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Application Number Priority Date Filing Date Title
KR1020100140688A KR101158656B1 (en) 2010-12-31 2010-12-31 Extinguishing device of gas insulated circuit breaker

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KR101158656B1 true KR101158656B1 (en) 2012-07-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170106838A (en) * 2016-03-14 2017-09-22 엘에스산전 주식회사 Extinguishing Unit of High Voltage Gas Circuit Breaker using PASB(Puffer-Assisted Self-Blast)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100345691B1 (en) * 2000-08-23 2002-07-27 한국전기연구원 Hybrid-extinction type gas circuit breaker
JP2003217411A (en) * 2002-01-18 2003-07-31 Toshiba Corp Gas circuit breaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100345691B1 (en) * 2000-08-23 2002-07-27 한국전기연구원 Hybrid-extinction type gas circuit breaker
JP2003217411A (en) * 2002-01-18 2003-07-31 Toshiba Corp Gas circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170106838A (en) * 2016-03-14 2017-09-22 엘에스산전 주식회사 Extinguishing Unit of High Voltage Gas Circuit Breaker using PASB(Puffer-Assisted Self-Blast)
KR102520091B1 (en) * 2016-03-14 2023-04-10 엘에스일렉트릭(주) Extinguishing Unit of High Voltage Gas Circuit Breaker using PASB(Puffer-Assisted Self-Blast)

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