JP5017003B2 - Metal closed switchgear - Google Patents

Metal closed switchgear Download PDF

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JP5017003B2
JP5017003B2 JP2007179998A JP2007179998A JP5017003B2 JP 5017003 B2 JP5017003 B2 JP 5017003B2 JP 2007179998 A JP2007179998 A JP 2007179998A JP 2007179998 A JP2007179998 A JP 2007179998A JP 5017003 B2 JP5017003 B2 JP 5017003B2
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box
front side
protective plate
bent
locking member
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JP2009017756A (en
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崇嗣 中山
秀二 菊地
洋輔 松野
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Toshiba Corp
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Description

本発明は、箱体内を換気する換気口を正面側に配置した金属閉鎖形スイッチギヤに関する。   The present invention relates to a metal closed type switchgear in which a ventilation port for ventilating a box is arranged on the front side.

従来、箱体内に遮断器のような電気機器を収納した金属閉鎖形スイッチギヤは、電気機器の発熱による温度上昇を抑制するため、正面側の下部付近に吸気する換気口が設けられ、天井部に排気する換気口が設けられている。所謂、自然換気形の金属閉鎖形スイッチギヤが知られている（例えば、特許文献１参照）。   Conventionally, a metal closed type switchgear in which an electrical device such as a circuit breaker is housed in a box body is provided with a ventilation port for intake near the lower part on the front side in order to suppress the temperature rise due to heat generation of the electrical device, There is a ventilation port for exhausting. A so-called natural ventilation type metal closed switchgear is known (see, for example, Patent Document 1).

一方、収納した電気機器が短絡事故を起こした場合には、アークが発生して圧力が上昇し、その高温ガスが箱体の正面側の換気口から噴出する可能性がある。正面側には、保守点検などの保守員がいることがあり、高温ガスの噴出を防止する必要がある。しかしながら、換気口は、温度上昇を抑制するために必要なものであり、封じ切ることができない。なお、天井部の換気口からの高温ガスの噴出は許容される。
特開２００７−２８７４０号公報 （第２ページ、図３） On the other hand, when the stored electrical equipment causes a short-circuit accident, an arc is generated and the pressure rises, and the high-temperature gas may be ejected from the ventilation port on the front side of the box. Maintenance personnel such as maintenance inspections may be present on the front side, and it is necessary to prevent high temperature gas from being ejected. However, the ventilation port is necessary for suppressing the temperature rise and cannot be sealed off. In addition, the ejection of hot gas from the ceiling vent is allowed.
JP 2007-28740 A (second page, FIG. 3)

上記の従来の金属閉鎖形スイッチギヤにおいては、箱体内の温度上昇を抑制するために設けられた正面側の換気口から、アーク発生時に、高温ガスが噴出する可能性がある。このため、高温ガスの噴出を確実に防止できるものが望まれていた。   In the conventional metal closed type switchgear described above, there is a possibility that hot gas may be ejected from the front side ventilation port provided to suppress the temperature rise in the box when an arc is generated. For this reason, what can prevent the ejection of a high temperature gas reliably 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、アーク発生時に、箱体の正面側の換気口から高温ガスの噴出を防止す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 type switchgear that prevents hot gas from being ejected from a vent on the front side of a box when an arc is generated.

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、電気機器を収納する箱体と、前記箱体の正面側に設けられた正面側換気口と、前記箱体の内側に設けられた前記正面側換気口を塞ぐ防護板と、前記正面側換気口の前記箱体側に設けられるとともに、外側にレ字状に折り曲げられた第１の係止部材と、前記第１の係止部材の折り曲げ部に係止されるとともに、前記防護板に設けられ、且つ内側にレ字状に折り曲げられた第２の係止部材と、前記箱体の内側に固定されるとともに、前記防護板の四隅を移動自在に貫通するスタッドと、前記スタッドの外周に設けられるとともに、前記防護板を開蓋するように付勢されたバネと、を備えたことを特徴とする。 In order to achieve the above object, a metal closed switchgear according to the present invention is provided with a box for storing electrical equipment, a front side ventilation opening provided on the front side of the box, and an inner side of the box. a protective plate for closing the front ventilation openings which are provided in said box body side of the front ventilation openings Rutotomoni, a first locking member which is bent in Les-shape outwardly, said first together is locked in the bent portion of the locking member, provided in the protective plate, and a second locking member which is bent in Les-shape on the inside, is fixed to the inside of the box body, the A stud that movably passes through the four corners of the protective plate, and a spring that is provided on the outer periphery of the stud and is biased to open the protective plate .

本発明によれば、正面側換気口に箱体内の圧力上昇により移動して係止される防護板を設けているので、アーク発生時に、防護板が正面側換気口を閉蓋し、圧力が低下するまでこの状態を維持し、正面側換気口からの高温ガスの噴出を確実に防止することができる。   According to the present invention, since the protective plate that is moved and locked by the pressure increase in the box is provided at the front side ventilation port, the protective plate closes the front side ventilation port when an arc occurs, and the pressure is This state is maintained until the temperature is lowered, and the ejection of hot gas from the front side ventilation port can be reliably prevented.

以下、図面を参照して本発明の実施例を説明する。   Embodiments of the present invention will be described below 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乃至図４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正面側換気口の開蓋状態を示す断面図、図３は、本発明の実施例１に係る金属閉鎖形スイッチギヤの正面側換気口の閉蓋状態を示す断面図、図４は、本発明の実施例１に係る金属閉鎖形スイッチギヤの箱体内でアークが発生したときの圧力特性を説明する図である。   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 the configuration of a metal closed switchgear according to a first embodiment of the present invention, and FIG. 2 is an open state of a front side vent of the metal closed switchgear according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing a closed state of the front side ventilation opening of the metal closed switchgear according to the first embodiment of the present invention, and FIG. 4 is a metal closure according to the first embodiment of the present invention. It is a figure explaining the pressure characteristic when an arc generate | occur | produces in the box body of a type | mold switchgear.

図１に示すように、電気機器を収納する箱体１内には、図示左側の正面側に、天井部から制御機器２、遮断器３が配置され、床側に吸気の正面側換気口４が設けられている。図示右側の背面側には、遮断器３の一方の主回路に接続された母線５、他方の主回路に接続された変流器６が配置されている。また、変流器６の主回路には、一方に接地開閉器７が接続され、他方に受電用のケーブル８が接続されている。なお、箱体１の天井部には、排気の天井側換気口９が設けられている。   As shown in FIG. 1, a control device 2 and a circuit breaker 3 are arranged from the ceiling on the front side on the left side in the box 1 for storing electrical equipment, and a front side ventilation port 4 for intake air on the floor side. Is provided. On the rear side on the right side of the figure, a bus 5 connected to one main circuit of the circuit breaker 3 and a current transformer 6 connected to the other main circuit are arranged. The main circuit of the current transformer 6 is connected to a ground switch 7 on one side and a power receiving cable 8 on the other side. Note that an exhaust ceiling side ventilation port 9 is provided at the ceiling of the box 1.

ここで、正面側換気口４には、箱体１の内側の四隅に四本の棒状のスタッド１０が固定されている。スタッド１０には、正面側換気口４を塞ぐ広さを有する板状の防護板１１の四隅が移動自在に貫通している。防護板１１は、アーク発生時の圧力上昇に伴う機械的強度と耐熱性を有するものである。スタッド１０端部には、ナット１２が固定され、防護板１１が脱落しないようになっている。   Here, four rod-shaped studs 10 are fixed to the front side ventilation port 4 at the four corners inside the box 1. The four corners of a plate-shaped protective plate 11 having a size for closing the front side ventilation port 4 are movably penetrated through the stud 10. The protective plate 11 has mechanical strength and heat resistance associated with an increase in pressure when an arc is generated. A nut 12 is fixed to the end of the stud 10 so that the protective plate 11 does not fall off.

また、スタッド１０の外周には、通常状態時に防護板１１を正面側換気口４から離して開蓋状態にするバネ１３が設けられている。そして、箱体１側には第１の係止金具１４が固定され、防護板１１側には第１の係止金具１４に係止される第２の係止金具１５が設けられている。例えば、第１の係止金具１４の先端を外側にレ字状に折り曲げ、第２の係止金具１５の先端を内側にレ字状に折り曲げたものにし、第１の係止金具１４よりも第２の係止金具１５の先端の外形寸法を僅かに大きいものにすると、互いの折り曲げ部が嵌め合わされ、防護板１１を係止することができる。   Further, a spring 13 is provided on the outer periphery of the stud 10 so as to separate the protective plate 11 from the front side ventilation opening 4 in the normal state so as to open the cover. And the 1st latching metal fitting 14 is fixed to the box body 1 side, and the 2nd latching metal fitting 15 latched by the 1st latching metal fitting 14 is provided in the guard plate 11 side. For example, the front end of the first locking member 14 is bent outwardly in a letter shape, and the tip of the second locking member 15 is bent inwardly in a letter shape. If the outer dimension of the tip of the second locking fitting 15 is made slightly larger, the bent portions are fitted together, and the protection plate 11 can be locked.

なお、一方に凸状の突起を設け、他方に凸状の部分が嵌め込まれる凹状の嵌め込み部を設けても、第１の係止金具１４に第２の係止金具１５を係止させることができる。これらを第１および第２の係止部材と定義する。   Even if a convex protrusion is provided on one side and a concave fitting portion into which a convex part is fitted is provided on the other side, the second locking metal 15 can be locked to the first locking metal 14. it can. These are defined as first and second locking members.

次に、防護板１１の動作を図２乃至図４を参照して説明する。   Next, the operation of the protection plate 11 will be described with reference to FIGS.

正面側換気口４の開蓋状態を図２に示す。箱体１側には、外側にレ字状に折り曲げた第１の係止金具１４が設けられ、防護板１１側には、内側にレ字状に折り曲げた第２の係止金具１５が設けられている。なお、防護板１１はバネ１３のバネ力で正面側換気口４から離され、換気が行われる。   The open state of the front side ventilation port 4 is shown in FIG. A first locking fitting 14 bent in a letter shape is provided on the outer side of the box body 1, and a second locking fitting 15 bent in a letter shape on the inner side is provided on the protection plate 11 side. It has been. The protection plate 11 is separated from the front side ventilation port 4 by the spring force of the spring 13, and ventilation is performed.

そして、短絡事故などでアークが発生した場合には、図３に示すように、箱体１内の圧力が上昇し、防護板１１が矢印のように正面側換気口４側に移動する。すると、正面側換気口４が防護板１１で塞がれるとともに、第１の係止金具１４に第２の係止金具１５が嵌め込まれ、防護板１１が係止される。これにより、アークによる高温ガスは、正面側換気口４から箱体１外に噴出しなくなる。これが、正面側換気口４の閉蓋状態である。   When an arc occurs due to a short circuit accident or the like, as shown in FIG. 3, the pressure in the box body 1 rises, and the protective plate 11 moves to the front vent 4 side as indicated by an arrow. Then, the front-side ventilation port 4 is closed with the protective plate 11, and the second locking member 15 is fitted into the first locking member 14, so that the protective plate 11 is locked. Thereby, the high temperature gas by an arc stops spouting out of the box 1 from the front side ventilation port 4. This is the closed state of the front side ventilation port 4.

高温ガスの圧力特性を図４に示すが、圧力は、時間ｔ０のアーク発生時から急激に上昇し、ｔ１で最大となり、そして下降を始めｔ２までにアークが消滅し圧力が低下する特性となる。このような圧力特性において、防護板１１は、ｔ０からｔ１までの間に正面側換気口４側に移動し、正面側換気口４を閉蓋し係止される。このため、防護板１１は、圧力が低下するｔ２まで正面側換気口４の閉蓋状態を維持することになる。   FIG. 4 shows the pressure characteristics of the hot gas. The pressure rises rapidly from the time of arc generation at time t0, reaches a maximum at t1, and starts to descend until the arc disappears and the pressure decreases. . In such pressure characteristics, the protection plate 11 moves to the front side ventilation port 4 side from t0 to t1, and closes and locks the front side ventilation port 4. For this reason, the protection plate 11 maintains the closed state of the front side ventilation port 4 until t2 when the pressure decreases.

ここで、仮に、防護板１１が箱体１側に係止されなかった場合には、圧力が最大となるｔ１から圧力が低下するｔ２までの間、箱体１内が減圧特性となるので、防護板１１が正面側換気口４から離れようとする動きをすることがある。このような状態にある防護板１１は、高温ガスを正面側換気口４から噴出する可能性が生じる。しかしながら、防護板１１を係止しているので、高温ガスを確実に箱体１外に噴出させないものとすることができる。天井側換気口９においては、高温ガスの噴出が許容される。   Here, if the protection plate 11 is not locked to the box body 1 side, the inside of the box body 1 has a decompression characteristic from t1 when the pressure is maximum to t2 when the pressure is reduced. The protective plate 11 may move to leave the front-side ventilation port 4. In the protection plate 11 in such a state, there is a possibility that high temperature gas is ejected from the front side ventilation port 4. However, since the protection plate 11 is locked, the high temperature gas can be reliably prevented from being ejected outside the box 1. In the ceiling side ventilation port 9, ejection of high temperature gas is permitted.

なお、防護板１１を耐熱性のある例えばフッ素樹脂製の絶縁物にすれば、バリア効果が生じるので、対地間の絶縁特性を向上させることができる。また、通常状態時の防護板１１の位置を検出する位置スイッチを設けておけば、換気が正常であることを検知することができる。   If the protective plate 11 is made of a heat-resistant insulator made of, for example, a fluororesin, a barrier effect is produced, so that the insulation characteristics between the ground can be improved. If a position switch for detecting the position of the protection plate 11 in the normal state is provided, it is possible to detect that the ventilation is normal.

上記実施例１の金属閉鎖形スイッチギヤによれば、箱体１側に第１の係止金具１４を設け、防護板１１に第２の係止金具１５を設けて、アーク発生時に、防護板１１で正面側換気口４を塞ぎ、圧力が低下するまでこの状態を維持しているので、高温ガスが正面側換気口４から噴出することを確実に防止することができる。   According to the metal closed type switchgear of the first embodiment, the first locking member 14 is provided on the box body 1 side, the second locking member 15 is provided on the protection plate 11, and the protection plate is provided when an arc is generated. 11, the front side ventilation port 4 is closed and this state is maintained until the pressure decreases, so that it is possible to reliably prevent the hot gas from being ejected from the front side ventilation port 4.

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５および図６を参照して説明する。図５は、本発明の実施例２に係る金属閉鎖形スイッチギヤの正面側換気口の開蓋状態を示す断面図、図６は、本発明の実施例２に係る金属閉鎖形スイッチギヤの正面側換気口の閉蓋状態を示す断面図である。なお、この実施例２が実施例１と異なる点は、防護板の構成である。各図において、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。また、金属閉鎖形スイッチギヤの構成は、実施例１と同様であるので説明を省略する。   Next, a metal closed switchgear according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a cross-sectional view showing the open state of the front side vent of the metal closed switchgear according to the second embodiment of the present invention, and FIG. 6 is a front view of the metal closed switchgear according to the second embodiment of the present invention. It is sectional drawing which shows the closed state of a side ventilation port. The second embodiment is different from the first embodiment in the configuration of the protective plate. In each figure, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Moreover, since the structure of the metal closed type switchgear is the same as that of Example 1, description is abbreviate | omitted.

図５に示すように、正面側換気口４には、箱体１の内側の上部に円弧状のスタッド２０が固定されている。スタッド２０には、一辺側が移動自在に貫通する板状の防護板１１が設けられている。防護板１１の他辺側は、正面側換気口４の下部側の箱体１に固定されたヒンジ２１に固定されている。   As shown in FIG. 5, an arc-shaped stud 20 is fixed to the front ventilation opening 4 at the upper part inside the box 1. The stud 20 is provided with a plate-shaped protective plate 11 that is movably penetrated on one side. The other side of the protection plate 11 is fixed to a hinge 21 fixed to the box 1 on the lower side of the front side ventilation port 4.

また、スタッド２０には、通常状態時に防護板１１を正面側換気口４から離して開蓋状態にするバネ１３が設けられている。スタッド２０端部には、ナット１２が固定され、防護板１１が脱落しないようになっている。開蓋状態では、防護板１１が箱体１側に約４５度の傾きにあり、換気が行われる。   In addition, the stud 20 is provided with a spring 13 that keeps the protective plate 11 away from the front-side ventilation opening 4 in a normal state and opens the lid. A nut 12 is fixed to the end of the stud 20 so that the protective plate 11 does not fall off. In the opened state, the protective plate 11 is inclined at about 45 degrees toward the box 1 and ventilation is performed.

箱体１側には、第３の係止金具２２が固定され、また、防護板１１の上部には、第３の係止金具２２に係止される第４の係止金具２３設けられている。例えば、第３の係止金具２２を外側にレ字状に折り曲げたものにし、第４の係止金具２３を内側にレ字状に折り曲げたものにすれば、第３の係止金具２２に第４の係止金具２３を係止させることができる。これらを第１および第２の係止部材と定義する。   A third locking fitting 22 is fixed on the box body 1 side, and a fourth locking fitting 23 to be locked to the third locking fitting 22 is provided on the upper part of the protection plate 11. Yes. For example, if the third locking bracket 22 is bent outwardly in a letter shape and the fourth locking bracket 23 is bent inwardly in a letter shape, the third locking bracket 22 is The fourth locking fitting 23 can be locked. These are defined as first and second locking members.

次に、防護板１１の動作を図６を参照して説明する。   Next, the operation of the protection plate 11 will be described with reference to FIG.

通常状態においては、防護板１１がバネ１３のバネ力で正面側換気口４の上部が開放され、換気が行われる。そして、短絡事故などでアークが発生した場合には、図６に示すように、箱体１内の圧力が上昇し、防護板１１がヒンジ２１を支点として図示矢印のように回動し、正面側換気口４が防護板１１で塞がれるとともに、第３の係止金具２２に第４の係止金具２３が嵌め込まれ、防護板１１が係止される。これにより、正面側換気口４が閉蓋状態となり、アークによる高温ガスの箱体１外への噴出を防止する。   In the normal state, the upper part of the front side ventilation opening 4 is opened by the spring force of the protection plate 11 by the spring 13, and ventilation is performed. When an arc occurs due to a short circuit accident or the like, as shown in FIG. 6, the pressure in the box body 1 rises, and the protection plate 11 rotates as shown by the arrow with the hinge 21 as a fulcrum. The side ventilation opening 4 is closed by the protection plate 11, and the fourth locking fitting 23 is fitted into the third locking fitting 22 to lock the protection plate 11. Thereby, the front side ventilation port 4 will be in a closed state, and the ejection of the hot gas to the exterior of the box 1 by an arc is prevented.

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と同様の効果を得ることができる。   According to the metal closed switchgear of the second embodiment, the same effect as that of the first embodiment can be obtained.

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正面側換気口の開蓋状態を示す断面図。Sectional drawing which shows the cover open state of the front side ventilation port 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正面側換気口の閉蓋状態を示す断面図。Sectional drawing which shows the closed state of the front side ventilation port 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箱体内でアークが発生したときの圧力特性を説明する図。The figure explaining the pressure characteristic when an arc generate | occur | produces in the box 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正面側換気口の開蓋状態を示す断面図。Sectional drawing which shows the cover open state of the front side ventilation opening of the metal closed type switchgear which concerns on Example 2 of this invention. 図６は、本発明の実施例２に係る金属閉鎖形スイッチギヤの正面側換気口の閉蓋状態を示す断面図。FIG. 6 is a cross-sectional view showing a closed state of the front side ventilation opening of the metal closed switchgear according to the second embodiment of the present invention.

符号の説明Explanation of symbols

１ 箱体
２ 制御機器
３ 遮断器
４ 正面側換気口
５ 母線
６ 変流器
７ 接地開閉器
８ ケーブル
９ 天井側換気口
１０、２０ スタッド
１１ 防護板
１２ ナット
１３ バネ
１４ 第１の係止金具
１５ 第２の係止金具
２１ ヒンジ
２２ 第３の係止金具
２３ 第４の係止金具 DESCRIPTION OF SYMBOLS 1 Box body 2 Control apparatus 3 Circuit breaker 4 Front side ventilation port 5 Bus 6 Current transformer 7 Grounding switch 8 Cable 9 Ceiling side ventilation port 10, 20 Stud 11 Guard plate 12 Nut 13 Spring 14 1st latching metal 15 Second locking bracket 21 Hinge 22 Third locking bracket 23 Fourth locking bracket

Claims (3)

電気機器を収納する箱体と、
前記箱体の正面側に設けられた正面側換気口と、
前記箱体の内側に設けられた前記正面側換気口を塞ぐ防護板と、
前記正面側換気口の前記箱体側に設けられるとともに、外側にレ字状に折り曲げられた第１の係止部材と、
前記第１の係止部材の折り曲げ部に係止されるとともに、前記防護板に設けられ、且つ内側にレ字状に折り曲げられた第２の係止部材と、
前記箱体の内側に固定されるとともに、前記防護板の四隅を移動自在に貫通するスタッドと、
前記スタッドの外周に設けられるとともに、前記防護板を開蓋するように付勢されたバネと、
を備えたことを特徴とする金属閉鎖形スイッチギヤ。 A box for storing electrical equipment;
A front side ventilation opening provided on the front side of the box,
A protective plate for closing the front-side ventilation opening provided inside the box,
Rutotomoni provided on the box body side of the front vents, a first locking member which is bent in Les-shape on the outside,
With locked in the bent portion of the first engagement member, provided in the protective plate, and the second locking member which is bent Les-shape and the inside,
A stud that is fixed inside the box and that movably penetrates the four corners of the protective plate,
A spring provided on the outer periphery of the stud and biased to open the protection plate;
A metal closed type switchgear characterized by comprising: 電気機器を収納する箱体と、
前記箱体の正面側に設けられた正面側換気口と、
前記箱体の内側に設けられた前記正面側換気口を塞ぐ防護板と、
前記防護板の下部に一辺が固定され、他辺が前記箱体に固定された回動自在のヒンジと、
前記正面側換気口の前記箱体側の上部に設けられるとともに、外側にレ字状に折り曲げられた第１の係止部材と、
前記第１の係止部材の折り曲げ部に係止されるとともに、前記防護板の上部に設けられ、且つ内側にレ字状に折り曲げられた第２の係止部材と、
前記箱体の内側に固定されるとともに、前記防護板の上部を移動自在に貫通するスタッドと、
前記スタッドの外周に設けられるとともに、前記防護板を開蓋するように付勢されたバネと、
を備えたことを特徴とする金属閉鎖形スイッチギヤ。 A box for storing electrical equipment;
A front side ventilation opening provided on the front side of the box,
A protective plate for closing the front-side ventilation opening provided inside the box,
A rotatable hinge with one side fixed to the lower part of the protective plate and the other side fixed to the box,
A first locking member which is provided at the upper part of the box side of the front side ventilation opening and is bent outwardly in a letter shape;
A second locking member that is locked to the bent portion of the first locking member, is provided at an upper portion of the protection plate, and is bent in a letter shape inside;
A stud that is fixed to the inside of the box and movably penetrates the upper part of the protective plate;
A spring provided on the outer periphery of the stud and biased to open the protection plate;
A metal closed type switchgear characterized by comprising: 前記防護板を耐熱性の絶縁物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。 3. The metal closed switchgear according to claim 1, wherein the protective plate is a heat-resistant insulator .
JP2007179998A 2007-07-09 2007-07-09 Metal closed switchgear Active JP5017003B2 (en)

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Cited By (1)

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US10164411B2 (en) 2014-09-24 2018-12-25 Mitsubishi Electric Corporation Switchgear

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JP5341693B2 (en) * 2009-09-24 2013-11-13 株式会社東芝 Metal closed switchgear
JP5286210B2 (en) * 2009-09-28 2013-09-11 株式会社東芝 Metal closed switchgear
JP7119758B2 (en) * 2018-08-21 2022-08-17 富士電機株式会社 Pressure difference relief device and panel device
CN111024428A (en) * 2019-12-20 2020-04-17 三峡大学 Dynamic response simulation test device and method for short circuit explosion shell inside switch cabinet

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JPS5816235Y2 (en) * 1977-11-01 1983-04-01 富士通株式会社 Louver
JPS55104308U (en) * 1979-01-16 1980-07-21
JPS6013209Y2 (en) * 1979-11-06 1985-04-26 日新電機株式会社 Closed switchboard ventilation system
JPS58136903U (en) * 1982-03-11 1983-09-14 株式会社東芝 closed switchboard
JPS60181117U (en) * 1984-05-11 1985-12-02 三菱電機株式会社 occlusion lid
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* Cited by examiner, † Cited by third party
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US10164411B2 (en) 2014-09-24 2018-12-25 Mitsubishi Electric Corporation Switchgear

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