JP2010183818A - Switch gear with closed metallic structure - Google Patents

Switch gear with closed metallic structure Download PDF

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JP2010183818A
JP2010183818A JP2009027806A JP2009027806A JP2010183818A JP 2010183818 A JP2010183818 A JP 2010183818A JP 2009027806 A JP2009027806 A JP 2009027806A JP 2009027806 A JP2009027806 A JP 2009027806A JP 2010183818 A JP2010183818 A JP 2010183818A
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pressure
chamber
plate
box
metal closed
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Satoko Nakagawa
聡子 中川
Takatsugu Nakayama
崇嗣 中山
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Toshiba Corp
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Toshiba Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch gear with closed metallic structure for instantly suppressing pressure increase in the chamber where a trouble is broken out. <P>SOLUTION: The switch gear with the closed metallic structure includes: a boxed body 1; a plurality of chambers 1a, 1b, 1c formed by partitioning the boxed body 1 with partitioning plates 2a, 2b; pressure-discharging holes 9a, 9b, 9c formed on the ceiling of the boxed body 1; pressure-discharging plates 10a, 10b, 10c to block the pressure-discharging holes 9a, 9b, 9c and to let them open when the pressure increases inside the boxed body 1; and air-circulating plates 11a, 11b formed on the partitioning plates 2a, 2b, to circulate the air inside the adjoining chambers 1a and 1c, and 1b and 1c. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、地絡事故などで上昇した高温ガスを箱体外へ放圧する金属閉鎖形スイッチギヤに関する。   The present invention relates to a metal closed switchgear that releases high-temperature gas that has risen due to a ground fault or the like out of a box.

従来、金属閉鎖形スイッチギヤにおいては、箱体内部で相間短絡や地絡事故などが発生して圧力が上昇すると、箱体天井部に設けた放圧口から外部へ高温ガスを放圧し、箱体が破壊されないようになっている（例えば、特許文献１参照。）。   Conventionally, in a metal closed type switchgear, when the pressure rises due to a short circuit between the phases or a ground fault inside the box, the high temperature gas is released to the outside from the pressure release port provided in the box ceiling. The body is not destroyed (for example, refer to Patent Document 1).

この種の金属閉鎖形スイッチギヤは、図４に示すように、箱体１内が、図示中間部の第１の仕切板２ａを境として、背面側の受電室１ａと、正面側の遮断器室１ｂとに分かれて構成されている。また、受電室１ａの図示上部には、Ｌ字状の第２の仕切板２ｂで区切られた母線室１ｃが設けられている。なお、遮断器室１ｂの上部には制御室１ｄ、下部には点検室１ｅが設けられている。   As shown in FIG. 4, this type of metal closed type switchgear includes a box 1 having a power receiving chamber 1 a on the back side and a circuit breaker on the front side, with the first partition plate 2 a in the middle of the figure as a boundary. It is divided into a chamber 1b. Moreover, the bus-bar room 1c divided by the L-shaped 2nd partition plate 2b is provided in the illustration upper part of the receiving chamber 1a. A control chamber 1d is provided in the upper part of the circuit breaker room 1b, and an inspection room 1e is provided in the lower part.

受電室１ａには、受電用ケーブル３が接続される主回路導体４が設けられ、第１の仕切板２ａに固定された下部主回路断路部５ａに接続されている。主回路導体４には、変流器６が貫通されている。   The power receiving chamber 1a is provided with a main circuit conductor 4 to which a power receiving cable 3 is connected, and is connected to a lower main circuit disconnecting portion 5a fixed to the first partition plate 2a. A current transformer 6 is passed through the main circuit conductor 4.

遮断器室１ｂには、遮断器７が設けられ、下部主回路が下部主回路断路部５ａに接続される。遮断器７の上部主回路は、第１の仕切板２ａに固定された上部主回路断路部５ｂに接続される。母線室１ｃには、上部主回路断路部５ｂに接続された母線８が設けられ、隣接する盤との接続が行われる。   A circuit breaker 7 is provided in the circuit breaker chamber 1b, and the lower main circuit is connected to the lower main circuit disconnecting portion 5a. The upper main circuit of the circuit breaker 7 is connected to the upper main circuit disconnecting part 5b fixed to the first partition plate 2a. The bus bar 1c is provided with a bus 8 connected to the upper main circuit disconnecting portion 5b, and is connected to an adjacent board.

受電室１ａ、遮断器室１ｂ、母線室１ｃの天井部には、それぞれ第１〜第３の放圧口９ａ、９ｂ、９ｃが設けられ、圧力上昇時に開放する放圧板１０ａ、１０ｂ、１０ｃがそれぞれ設けられている。   First to third pressure relief ports 9a, 9b, 9c are respectively provided in the ceiling portions of the power receiving chamber 1a, the circuit breaker chamber 1b, and the bus bar chamber 1c, and pressure release plates 10a, 10b, 10c that are opened when the pressure rises Each is provided.

特開平１０−３２２８１１号公報 （第２〜３ページ、図１２）Japanese Patent Laid-Open No. 10-322811 (pages 2 and 3, FIG. 12)

上記の従来の金属閉鎖形スイッチギヤにおいては、次のような問題がある。地絡事故などによって上昇する圧力は、短時間で最大値に達する。放圧口９ａ、９ｂ、９ｃ付近に事故点があれば、直ちに放圧することができるものの、事故点が離れていると、短時間で上昇する圧力を抑えることができず、箱体１や仕切板２ａ、２ｂなどが膨張したり破損することがある。箱体１に損傷を与えると、正面側などの外部へ高温ガスが噴出することになる。   The conventional metal closed switchgear described above has the following problems. The pressure that rises due to a ground fault etc. reaches the maximum value in a short time. If there is an accident point near the pressure relief ports 9a, 9b, 9c, the pressure can be released immediately, but if the accident point is far away, the pressure rising in a short time cannot be suppressed, and the box 1 or partition The plates 2a, 2b, etc. may expand or break. When the box body 1 is damaged, the high temperature gas is ejected to the outside such as the front side.

一般的に、地絡事故などが発生すると、当該室のみに止まらず、箱体１内の全室１ａ〜１ｅの点検、清掃、部品交換などが行われる。このため、点検などを行う箱体１内の各室１ａ〜１ｅに高温ガスを封じ込めて圧力上昇を抑え、少なくとも箱体１が損傷して放圧口９ａ、９ｂ、９ｃ以外から高温ガスが放出されないものが望まれていた。   In general, when a ground fault or the like occurs, not only the room but also all the rooms 1a to 1e in the box 1 are inspected, cleaned, and replaced. For this reason, high temperature gas is contained in each chamber 1a to 1e in the box 1 to be inspected and the pressure rise is suppressed, and at least the box 1 is damaged, and the high temperature gas is discharged from other than the pressure relief ports 9a, 9b and 9c. What was not desired was desired.

本発明は上記問題を解決するためになされたもので、事故が起きた当該室の圧力上昇を短時間で抑制し得る金属閉鎖形スイッチギヤを提供することを目的とする。   The present invention has been made to solve the above problems, and an object of the present invention is to provide a metal closed switchgear that can suppress an increase in pressure in the chamber in which an accident has occurred in a short time.

上記目的を達成するために、本発明の金属閉鎖形スイッチギヤは、箱体と、前記箱体内を仕切板で区切られて形成された複数の室と、前記箱体の天井部に設けられた放圧口と、前記放圧口を塞ぐとともに、前記箱体内の圧力上昇時に開放される放圧板と、前記仕切板に設けられるとともに、隣接する室の空気が流通する空気流通板とを備えたことを特徴とする。   To achieve the above object, a metal closed switchgear according to the present invention is provided in a box, a plurality of chambers formed by partitioning the box with partition plates, and a ceiling of the box. A pressure relief port, a pressure relief plate that closes the pressure relief port and is opened when the pressure in the box rises, and an air flow plate that is provided in the partition plate and through which air in an adjacent chamber circulates are provided. It is characterized by that.

本発明によれば、各室を区切る仕切板を空気が流通するものとしているので、事故が発生した当該室の高温ガスは隣接する室に拡散され、圧力上昇を速やかに抑えることができる。   According to the present invention, since air flows through the partition plates that partition the chambers, the hot gas in the chamber where the accident has occurred is diffused into the adjacent chambers, and the pressure rise can be quickly suppressed.

本発明の実施例１に係る金属閉鎖形スイッチギヤの構成を示す側面図。The side view which shows the structure of the metal closed type switchgear which concerns on Example 1 of this invention. 本発明の実施例１に係る金属閉鎖形スイッチギヤの仕切板を示す正面図。The front view which shows the partition plate of the metal closed type switchgear which concerns on Example 1 of this invention. 本発明の実施例２に係る金属閉鎖形スイッチギヤの構成を示す側面図。The side view which shows the structure of the metal closed type switchgear which concerns on Example 2 of this invention. 従来の金属閉鎖形スイッチギヤの構成を示す側面図。The side view which shows the structure of the conventional metal closed type switchgear.

以下、図面を参照して本発明を実施するための形態について説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

先ず、本発明の実施例１に係る金属閉鎖形スイッチギヤを図１、図２を参照して説明する。図１は、本発明の実施例１に係る金属閉鎖形スイッチギヤの構成を示す側面図、図２は、本発明の実施例１に係る金属閉鎖形スイッチギヤの仕切板を示す正面図である。なお、各図において、従来と同様の構成部分については、同一符号を付した。   First, a metal closed switchgear according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a configuration of a metal closed switchgear according to a first embodiment of the present invention, and FIG. 2 is a front view showing a partition plate of the metal closed switchgear according to the first embodiment of the present invention. . In addition, in each figure, the same code | symbol was attached | subjected about the component similar to the past.

図１に示すように、箱体１内は、図示上下方向に設けられた第１の仕切板２ａを境として、背面側の受電室１ａと、正面側の遮断器室１ｂとに分かれて構成されている。また、受電室１ａの図示上部には、Ｌ字状の第２の仕切板２ｂで区切られた母線室１ｃが設けられている。なお、遮断器室１ｂの上部には制御室１ｄ、下部には点検室１ｅが設けられている。   As shown in FIG. 1, the inside of the box 1 is divided into a power receiving chamber 1a on the back side and a circuit breaker chamber 1b on the front side, with a first partition plate 2a provided in the vertical direction in the figure as a boundary. Has been. Moreover, the bus-bar room 1c divided by the L-shaped 2nd partition plate 2b is provided in the illustration upper part of the receiving chamber 1a. A control chamber 1d is provided in the upper part of the circuit breaker room 1b, and an inspection room 1e is provided in the lower part.

受電室１ａには、受電用ケーブル３が接続される主回路導体４が設けられ、第１の仕切板２ａに貫通固定された下部主回路断路部５ａに接続されている。主回路導体４には、変流器６が貫通されている。   The power receiving chamber 1a is provided with a main circuit conductor 4 to which a power receiving cable 3 is connected, and is connected to a lower main circuit disconnecting portion 5a that is fixedly penetrated to the first partition plate 2a. A current transformer 6 is passed through the main circuit conductor 4.

遮断器室１ｂには、真空バルブを備えた遮断器７が設けられ、下部主回路が下部主回路断路部５ａに接続される。遮断器７の上部主回路は、第１の仕切板２ａに貫通固定された上部主回路断路部５ｂに接続される。   The circuit breaker chamber 1b is provided with a circuit breaker 7 having a vacuum valve, and the lower main circuit is connected to the lower main circuit disconnecting part 5a. The upper main circuit of the circuit breaker 7 is connected to the upper main circuit disconnecting part 5b that is fixedly penetrated to the first partition plate 2a.

母線室１ｃには、上部主回路断路部５ｂに接続された三相分の母線８が設けられている。母線８により、隣接する盤との接続が行われる。   The bus room 1c is provided with a bus 8 for three phases connected to the upper main circuit disconnecting part 5b. The bus 8 connects to the adjacent board.

受電室１ａ、遮断器室１ｂ、母線室１ｃの天井部には、それぞれ第１〜第３の放圧口９ａ、９ｂ、９ｃが設けられている。第１〜第３の放圧口９ａ、９ｂ、９ｃには、それぞれ通常時にこれを塞ぎ、圧力上昇時にこれを開放する第１〜第３の放圧板１０ａ、１０ｂ、１０ｃが設けられている。   First to third pressure relief ports 9a, 9b, and 9c are provided in the ceiling portions of the power receiving chamber 1a, the circuit breaker chamber 1b, and the bus bar chamber 1c, respectively. The first to third pressure relief ports 9a, 9b, and 9c are provided with first to third pressure relief plates 10a, 10b, and 10c, respectively, which are normally closed and opened when the pressure rises.

ここで、図２に示すように、第１の仕切板２ａには、網状の第１の網板１１ａが設けられており、遮断器室１ｂと母線室１ｃとの空気が流通するようになっている。第１の網板１１ａの面積は、第１〜第３の放圧口９ａ、９ｂ、９ｃの面積のそれぞれよりも大きい。また、第１の網板１１ａを構成する素線は、数百Ａの地絡電流に耐え得るような太さである。更に、高温ガスに対して容易に溶損しないように、例えばニッケルやクロム合金からなる耐熱材料からなっている。   Here, as shown in FIG. 2, the first partition plate 2a is provided with a net-like first mesh plate 11a so that air between the circuit breaker chamber 1b and the busbar chamber 1c circulates. ing. The area of the first net 11a is larger than each of the areas of the first to third pressure relief ports 9a, 9b, 9c. Moreover, the strand which comprises the 1st net | network board 11a is the thickness which can endure several hundred A ground fault current. Furthermore, it is made of a heat-resistant material made of, for example, nickel or a chromium alloy so as not to be easily melted by high-temperature gas.

また、第２の仕切板２ｂにも、受電室１ａと母線室１ｃとの空気が流通する網状の第２の網板１１ｂが設けられている。第２の網板１１ｂも第１の網板１１ａと同様に、面積が第１〜第３の放圧口９ａ、９ｂ、９ｃよりも大きく、また、素線が地絡電流に耐え得るような太さであり、耐熱材料からなっている。   The second partition plate 2b is also provided with a net-like second net plate 11b through which air flows between the power receiving chamber 1a and the bus bar chamber 1c. Similarly to the first mesh plate 11a, the second mesh plate 11b is larger in area than the first to third pressure relief ports 9a, 9b, 9c, and the strands can withstand a ground fault current. Thickness and made of heat-resistant material.

これにより、例えば、変流器６で地絡事故が発生した場合、第１の放圧板１０ａが動作し、圧力が上昇した高温ガスを第１の放圧口９ａから外部に放出しようとするものの、変流器６から第１の放圧口９ａまでの距離があるので、第１の放圧板１０ａの動作が遅れる。しかしながら、高温ガスは、第２の網板１１ｂを通って、母線室１ｃ内に拡散し、第３の放圧板１０ｃを動作させ、第３の放圧口９ｃからも放出される。圧力上昇が過大な場合には、高温ガスが第１の網板１１ａを通って、第２の放圧板１０ｂを動作させる。   Thereby, for example, when a ground fault occurs in the current transformer 6, the first pressure release plate 10a operates, and the high-temperature gas whose pressure has been increased is going to be released to the outside from the first pressure release port 9a. Since there is a distance from the current transformer 6 to the first pressure release port 9a, the operation of the first pressure release plate 10a is delayed. However, the high-temperature gas diffuses into the bus bar chamber 1c through the second mesh plate 11b, operates the third pressure relief plate 10c, and is also released from the third pressure relief port 9c. When the pressure rise is excessive, the hot gas passes through the first mesh plate 11a and operates the second pressure release plate 10b.

即ち、網板１１ａ、１１ｂにより、主回路を収納した箱体１内の全室１ａ、１ｂ、１ｃに高温ガスが拡散されることになる。そして、放圧口９ａ、９ｂ、９ｃよりも網板１１ａ、１１ｂの面積が大きいので、拡散速度は速く、変流器６を収納した受電室１ａの圧力上昇を速やかに抑え込むことができる。このため、短時間での過大な圧力上昇によって、事故の当該室となる受電室１ａの膨張、破損などを防ぐことができ、高温ガスが箱体１外へ噴出することを抑えることができる。   That is, the high temperature gas is diffused by the mesh plates 11a and 11b in all the chambers 1a, 1b and 1c in the box 1 containing the main circuit. And since the area of the net | network plates 11a and 11b is larger than the pressure release port 9a, 9b, 9c, a diffusion rate is quick and it can suppress the pressure rise of the receiving chamber 1a which accommodated the current transformer 6 rapidly. For this reason, the excessive pressure rise in a short time can prevent expansion and breakage of the power receiving chamber 1a, which is the chamber of the accident, and can suppress the high temperature gas from being ejected out of the box 1.

また、この種の金属閉鎖形スイッチギヤは抵抗接地系となっているので、網板１１ａ、１１ｂに地絡電流が流れても、素線が電流容量と耐熱性を有するので、容易に溶損することはない。受電室１ａから母線室１ｃへ高温ガスが流れ込んでも、アーク電流は第２の網板１１ｂを流れるので、母線８などへの事故波及を防止することができる。   Further, since this type of metal closed type switchgear is a resistance grounding system, even if a ground fault current flows through the mesh plates 11a and 11b, the strands have a current capacity and heat resistance, so that they are easily melted. There is nothing. Even if high-temperature gas flows from the power receiving chamber 1a to the bus bar chamber 1c, the arc current flows through the second mesh plate 11b, so that it is possible to prevent an accident from spreading to the bus bar 8 and the like.

なお、復旧においては、事故を起こした受電室１ａ内の点検、清掃、部品交換を行うものの、母線室１ｃや遮断器室１ｂにも高温ガスが拡散するので、必要に応じ、受電室１ａと同様の点検を行うものとする。   In restoration, inspection, cleaning, and parts replacement in the power receiving room 1a that caused the accident are performed, but the hot gas diffuses into the bus bar room 1c and the circuit breaker room 1b. The same inspection shall be performed.

上記実施例１の金属閉鎖形スイッチギヤによれば、遮断器室１ｂと母線室１ｃを区切る第１の仕切板２ａに空気が流通する第１の網板１１ａを設け、また受電室１ａと母線室１ｃを区切る第２の仕切板２ｂにも空気が流通する第２の網板１１ｂを設けているので、事故が発生した当該室の高温ガスは隣接する各室１ａ、１ｂ、１ｃに拡散され、圧力上昇を抑えることができる。また、所定値以上の圧力上昇が伴えば、それぞれの放圧板１０ａ、１０ｂ、１０ｃが動作し、箱体１内の圧力上昇を速やかに抑制することができる。   According to the metal closed switchgear of the first embodiment, the first mesh plate 11a through which air flows is provided in the first partition plate 2a that divides the circuit breaker chamber 1b and the bus bar chamber 1c, and the power receiving chamber 1a and the bus bar Since the second partition plate 2b that divides the chamber 1c is also provided with the second mesh plate 11b through which air flows, the hot gas in the chamber where the accident has occurred is diffused into the adjacent chambers 1a, 1b, and 1c. The pressure rise can be suppressed. Moreover, if the pressure rise more than a predetermined value is accompanied, each pressure release plate 10a, 10b, 10c will operate | move and the pressure rise in the box 1 can be suppressed rapidly.

上記実施例１では、各室１ａ、１ｂ、１ｃの空気の流通を網状の網板１１ａ、１１ｂで説明したが、格子状、簾状、蜂の巣状など空気を流通させるものなら用いることができる。これらを各室１ａ、１ｂ、１ｃを区切る仕切板２ａ、２ｂに設けられた隣接する室の空気が流通する空気流通板と称する。   In the first embodiment, the air flow in the chambers 1a, 1b, and 1c has been described using the net-like net plates 11a and 11b. However, any air flow can be used as long as it is a lattice shape, a spider shape, or a honeycomb shape. These are referred to as air circulation plates through which the air in adjacent chambers provided in the partition plates 2a and 2b separating the chambers 1a, 1b and 1c flows.

次に、本発明の実施例２に係る金属閉鎖形スイッチギヤを図３を参照して説明する。図３は、本発明の実施例２に係る金属閉鎖形スイッチギヤの構成を示す側面図である。なお、この実施例２が実施例１と異なる点は、放圧口の取付け位置である。図３において、実施例１と同様の構成部分においては、同一符号を付し、その詳細な説明を省略する。   Next, a metal closed switchgear according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a side view showing the configuration of the metal closed switchgear according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in the attachment position of the pressure release port. In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図３に示すように、箱体１の天井部には、遮断器室１ｂと母線室１ｃを跨ぎ、第１の仕切板２ａが略中央部に位置する第４の放圧口９ｄが設けられている。第４の放圧口９ｄには、遮断器室１ｂや母線室１ｃの圧力上昇時に開放する第４の放圧板１０ｄが設けられている。地絡事故などは、全室１ａ、１ｂ、１ｃ同時に起こることが極めて少ないので、第４の放圧口９ｄの面積は第１の網板１１ａ、および第２の網板１１ｂよりも小さくてもよい。   As shown in FIG. 3, the ceiling part of the box body 1 is provided with a fourth pressure release port 9d that straddles the circuit breaker chamber 1b and the bus bar chamber 1c and in which the first partition plate 2a is located at a substantially central portion. ing. The fourth pressure release port 9d is provided with a fourth pressure release plate 10d that is opened when the pressure in the circuit breaker chamber 1b or the busbar chamber 1c is increased. Since ground faults and the like rarely occur at the same time in all the rooms 1a, 1b, 1c, even if the area of the fourth pressure relief port 9d is smaller than the first mesh plate 11a and the second mesh plate 11b. Good.

これにより、高温ガスは、受電室１ａの地絡事故では第２の網板１１ｂを通って第４の放圧口９ｄから放出され、また、遮断器室１ｂと母線室１ｃでは直接第４の放圧口９ｄから放出される。   As a result, the hot gas is discharged from the fourth pressure relief port 9d through the second net 11b in the case of a ground fault in the power receiving chamber 1a, and the fourth gas directly in the circuit breaker chamber 1b and the busbar chamber 1c. It is discharged from the pressure release port 9d.

上記実施例２の金属閉鎖形スイッチギヤによれば、実施例１による効果のほかに、受電室１ａ、遮断器室１ｂ、母線室１ｃの放圧を第４の放圧口９ｄから行うことができ、部品点数を削減することができる。   According to the metal closed switchgear of the second embodiment, in addition to the effects of the first embodiment, the pressure receiving chamber 1a, the circuit breaker chamber 1b, and the busbar chamber 1c can be released from the fourth pressure releasing port 9d. And the number of parts can be reduced.

１ 箱体
１ａ 受電室
１ｂ 遮断器室
１ｃ 母線室
１ｄ 制御室
１ｅ 点検室
２ａ 第１の仕切板
２ｂ 第２の仕切板
３ 受電用ケーブル
４ 主回路導体
５ａ、５ｂ 主回路断路部
６ 変流器
７ 遮断器
８ 母線
９ａ 第１の放圧口
９ｂ 第２の放圧口
９ｃ 第３の放圧口
９ｄ 第４の放圧口
１０ａ 第１の放圧板
１０ｂ 第２の放圧板
１０ｃ 第３の放圧板
１０ｄ 第４の放圧板
１１ａ 第１の網板
１１ｂ 第２の網板 DESCRIPTION OF SYMBOLS 1 Box 1a Power receiving room 1b Circuit breaker room 1c Bus bar room 1d Control room 1e Inspection room 2a 1st partition plate 2b 2nd partition plate 3 Power receiving cable 4 Main circuit conductor 5a, 5b Main circuit disconnecting part 6 Current transformer 7 Breaker 8 Bus 9a 1st pressure release port 9b 2nd pressure release port 9c 3rd pressure release port 9d 4th pressure release port 10a 1st pressure release plate 10b 2nd pressure release plate 10c 3rd release Pressure plate 10d Fourth pressure release plate 11a First mesh plate 11b Second mesh plate

Claims (5)

箱体と、
前記箱体内を仕切板で区切られて形成された複数の室と、
前記箱体の天井部に設けられた放圧口と、
前記放圧口を塞ぐとともに、前記箱体内の圧力上昇時に開放される放圧板と、
前記仕切板に設けられるとともに、隣接する室の空気が流通する空気流通板と
を備えたことを特徴とする金属閉鎖形スイッチギヤ。 Box and
A plurality of chambers formed by partitioning the box with partition plates;
A pressure relief opening provided in the ceiling of the box;
A pressure relief plate that closes the pressure relief opening and is opened when the pressure in the box rises;
A metal closed switchgear provided with an air flow plate provided on the partition plate and through which air in an adjacent chamber flows. 前記放圧口を隣接する前記室を跨いで設けたことを特徴とする請求項１に記載の金属閉鎖形スイッチギヤ。   The metal closed switchgear according to claim 1, wherein the pressure release port is provided across the adjacent chambers. 前記空気流通板を網状としたことを特徴とする請求項１または請求項２に記載の金属閉鎖形スイッチギヤ。   The metal closed switchgear according to claim 1 or 2, wherein the air circulation plate has a mesh shape. 前記空気流通板の面積を前記放圧口よりも大きくしたことを特徴とする請求項１乃至請求項３のいずれか１項に記載の金属閉鎖形スイッチギヤ。   The metal closed switchgear according to any one of claims 1 to 3, wherein an area of the air circulation plate is made larger than that of the pressure release port. 前記空気流通板を構成する素線を、地絡電流を流し得る電流容量としたことを特徴とする請求項１乃至請求項４のいずれか１項に記載の金属閉鎖形スイッチギヤ。   5. The metal closed switchgear according to claim 1, wherein the wire constituting the air flow plate has a current capacity capable of flowing a ground fault current. 6.
JP2009027806A 2009-02-09 2009-02-09 Switch gear with closed metallic structure Pending JP2010183818A (en)

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JP2009027806A JP2010183818A (en) 2009-02-09 2009-02-09 Switch gear with closed metallic structure

Publications (1)

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Family

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017221605A1 (en) * 2016-06-21 2017-12-28 三菱電機株式会社 Switchgear
JP2019054630A (en) * 2017-09-14 2019-04-04 富士電機株式会社 Pressure releasing device and distribution board

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017221605A1 (en) * 2016-06-21 2017-12-28 三菱電機株式会社 Switchgear
JP2019054630A (en) * 2017-09-14 2019-04-04 富士電機株式会社 Pressure releasing device and distribution board

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