JP4637708B2 - Insulating gas sealing method for gas insulated switchgear and method for manufacturing gas insulated switchgear - Google Patents

Insulating gas sealing method for gas insulated switchgear and method for manufacturing gas insulated switchgear Download PDF

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JP4637708B2
JP4637708B2 JP2005287917A JP2005287917A JP4637708B2 JP 4637708 B2 JP4637708 B2 JP 4637708B2 JP 2005287917 A JP2005287917 A JP 2005287917A JP 2005287917 A JP2005287917 A JP 2005287917A JP 4637708 B2 JP4637708 B2 JP 4637708B2
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moisture
insulated switchgear
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JP2007104754A (en
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暁 吉田
正博 有岡
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Mitsubishi Electric Corp
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Description

この発明は、絶縁ガスとして乾燥空気を用いるガス絶縁開閉装置の絶縁ガス封入方法及びガス絶縁開閉装置の製造方法に関するものである。   The present invention relates to an insulating gas sealing method for a gas insulated switchgear using dry air as an insulating gas and a method for manufacturing the gas insulated switchgear.

ガス絶縁開閉装置の絶縁ガスとして、ＳＦ６ガスを用いる場合、真空引きまたはガス置換等により、タンク密封時にタンク内に残留している水分および空気をタンク外に排出し、代わってＳＦ６ガスをタンク内に導入し密封していた。類似の技術文献としては、特許文献１，２がある。 As an insulating gas in the gas insulated switchgear, when using the SF 6 gas, by vacuum or gas substitution or the like, and discharging the water and air remaining in the tank when the tank sealed to the outside of the tank, the SF 6 gas in place It was introduced into the tank and sealed. Similar technical documents include Patent Documents 1 and 2.

特開平１１−２９０６３８号公報Japanese Patent Laid-Open No. 11-290638 特開２００３−１７８６３３号公報JP 2003-178633 A

従来のガス絶縁開閉装置では、絶縁ガスとして、ＳＦ６ガスを用いる場合、公害問題と共に、真空引きやガス置換などのガス処理を必要とするため、相当の長いガス処理時間を要しコスト高になるという問題点があった。
この発明は、上記のような問題点を解消するためになされたもので、空気の入ったタンクに、乾燥空気を加え加圧し密封することができ、ガス処理時間を大幅に短縮することができるガス絶縁開閉装置の絶縁ガス封入方法及びガス絶縁開閉装置の製造方法を得ることを目的とする。
また、真空引きやガス置換のガス処理をせずに、空気の入ったタンクに、乾燥空気を加え加圧し密封することができ、ガス処理時間を大幅に短縮することができるガス絶縁開閉装置の絶縁ガス封入方法及びガス絶縁開閉装置の製造方法を得ることを目的とする。 In the conventional gas-insulated switchgear, when SF 6 gas is used as the insulating gas, gas treatment such as evacuation or gas replacement is required along with pollution problems. There was a problem of becoming.
The present invention has been made to solve the above-described problems, and can be pressurized and sealed by adding dry air to a tank containing air, thereby greatly reducing the gas processing time. It is an object of the present invention to obtain an insulating gas sealing method for a gas insulated switchgear and a method for manufacturing a gas insulated switchgear.
In addition, a gas-insulated switchgear that can be pressurized and sealed by adding dry air to a tank containing air without evacuation or gas replacement. It is an object of the present invention to obtain an insulating gas sealing method and a gas insulating switchgear manufacturing method.

この発明に係わるガス絶縁開閉装置の絶縁ガス封入方法は、電気機器が設置され絶縁ガスを乾燥空気とするタンクを備えるガス絶縁開閉装置の絶縁ガス封入方法であって、空気が入ったままの状態で上記タンクを密封する場合に、上記タンク内に残留する水分量、及び上記タンク密封後上記タンクを次回に開放するまで、または製品期待寿命の間に上記タンク内に侵入する水分量との合計の水分量を求める工程と、求められた合計の水分量を少なくとも吸着する水分吸着剤を上記タンク内に設置する工程と、上記水分吸着剤を上記タンク内に設置後、上記タンク内の水分が、乾燥空気を加え上記タンクがガス絶縁開閉装置の定格ガス圧まで加圧されたときに結露しないように、上記水分吸着剤が上記タンク内の水分を吸着するに必要とする時間放置する工程と、上記放置後に上記タンク内に乾燥空気を加えて加圧し上記タンクを密封する工程とを含むようにしたものである。 An insulating gas sealing method for a gas-insulated switchgear according to the present invention is an insulating gas sealing method for a gas-insulated switchgear having a tank in which electrical equipment is installed and the insulating gas is used as dry air. When the tank is sealed, the sum of the amount of moisture remaining in the tank and the amount of moisture entering the tank until the next time the tank is opened after the tank is sealed or during the expected product life A step of determining the amount of water in the tank, a step of installing in the tank a water adsorbent that absorbs at least the total amount of water determined, and after the water adsorbent is installed in the tank, When the moisture adsorbent is necessary to adsorb moisture in the tank so that condensation does not occur when the tank is pressurized to the rated gas pressure of the gas insulated switchgear by adding dry air A step of standing is obtained by such a step of sealing the pressurized the tank by adding dry air into the tank after the standing.

また、上記水分吸着剤を上記タンク内に設置後、上記タンク内の水分および空気を真空引き及びガス置換によってタンク外に排出せずに、上記タンク内に乾燥空気を加えて加圧し上記タンクを密封するようにしたものである。   In addition, after the moisture adsorbent is installed in the tank, the moisture and air in the tank are not exhausted outside the tank by evacuation and gas replacement, and dry air is added to the tank to pressurize the tank. It is designed to be sealed.

さらに、この発明に係わるガス絶縁開閉装置の製造方法は、電気機器が設置され絶縁ガスを乾燥空気とするタンクを備えるガス絶縁開閉装置の製造方法であって、空気が入ったままの状態で上記タンクを密封した場合に、上記タンク内に残留する水分量、及び上記タンク密封後上記タンクを次回に開放するまで、または製品期待寿命の間に上記タンク内に侵入する水分量との合計の水分量を求める工程と、求められた合計の水分量を少なくとも吸着する水分吸着剤を上記タンク内に設置する工程と、上記水分吸着剤を上記タンク内に設置後、上記タンク内の水分が、乾燥空気を加え上記タンクがガス絶縁開閉装置の定格ガス圧まで加圧されたときに結露しないように、上記水分吸着剤が上記タンク内の水分を吸着するに必要とする時間放置する工程と、上記放置後に上記タンク内に乾燥空気を加えて加圧し上記タンクを密封する工程とを含むようにしたものである。 Furthermore, the manufacturing method of the gas insulated switchgear according to the present invention is a method of manufacturing electric devices are installed gas-insulated switchgear apparatus comprising a tank for the insulating gas and dry air, above remains containing the air When the tank is sealed, the total amount of moisture remaining in the tank and the amount of moisture that enters the tank until the tank is opened next time after the tank is sealed or during the expected life of the product. A step of determining the amount, a step of installing in the tank a water adsorbent that adsorbs at least the determined total amount of water, and after the water adsorbent is installed in the tank, the water in the tank is dried. The moisture adsorbent is allowed to stand for the time required to adsorb moisture in the tank so that condensation does not occur when the tank is pressurized to the rated gas pressure of the gas insulated switchgear by adding air. A step, in which to include a step of sealing the pressurized the tank by adding dry air into the tank after the standing.

この発明の絶縁開閉装置の絶縁ガス封入方法によれば、空気の入ったタンクに絶縁ガスである乾燥空気を加え加圧し密封することができ、ガス処理時間を大幅に短縮することができると共に、コスト高を防ぐことができる。また、水分吸着剤を上記タンク内に設置後、タンク内の水分が、乾燥空気を加えタンクがガス絶縁開閉装置の定格ガス圧まで加圧されたときに結露しないように、水分吸着剤がタンク内の水分を吸着するに必要とする時間放置し、その後、乾燥空気を加え加圧し密封するようにしたので、乾燥空気を加え加圧し密封したときにタンク内の水分が結露しないから、タンク内設置電気機器の結露による絶縁性能の著しい低下を防止することができる。 According to the insulating gas sealing method of the insulating switchgear of the present invention, it is possible to pressurize and seal dry air that is an insulating gas in a tank containing air, greatly reducing the gas processing time, High cost can be prevented. In addition, after the moisture adsorbent is installed in the tank, the moisture adsorbent is stored in the tank to prevent condensation when dry air is added and the tank is pressurized to the rated gas pressure of the gas insulated switchgear. The tank was left for the time necessary to adsorb the moisture in the tank, and then pressurized and sealed by adding dry air, so the moisture in the tank did not condense when pressurized and sealed with dry air. It is possible to prevent a significant decrease in insulation performance due to condensation of the installed electrical equipment.

また、空気の入ったタンクに、真空引きやガス置換のガス処理をせずに、絶縁ガスである乾燥空気を加え加圧し密封することができ、ガス処理時間を大幅に短縮することができると共に、コスト高を防ぐことができ、合わせて、乾燥空気の使用量を減らすことができ、絶縁開閉装置のタンクは真空に耐える強度を必要としない。   In addition, it can be pressurized and sealed by adding dry air, which is an insulating gas, to the tank containing air without evacuation or gas treatment, and gas treatment time can be greatly shortened. In addition, high cost can be prevented, and in addition, the amount of dry air used can be reduced.

この発明の絶縁開閉装置の製造方法によれば、空気の入ったタンクに絶縁ガスである乾燥空気を加え加圧し密封することができ、ガス処理時間を大幅に短縮することができると共に、コスト高を防ぐことができる。また、水分吸着剤を上記タンク内に設置後、タンク内の水分が、乾燥空気を加えタンクがガス絶縁開閉装置の定格ガス圧まで加圧されたときに結露しないように、水分吸着剤がタンク内の水分を吸着するに必要とする時間放置し、その後、乾燥空気を加え加圧し密封するようにしたので、乾燥空気を加え加圧し密封したときにタンク内の水分が結露しないから、タンク内設置電気機器の結露による絶縁性能の著しい低下を防止することができる。 According to the method for manufacturing an insulated switchgear of the present invention, dry air as an insulating gas can be applied to a tank containing air to be pressurized and sealed, and the gas processing time can be greatly shortened and the cost is increased. Can be prevented. In addition, after the moisture adsorbent is installed in the tank, the moisture adsorbent is stored in the tank to prevent condensation when dry air is added and the tank is pressurized to the rated gas pressure of the gas insulated switchgear. The tank was left for the time necessary to adsorb the moisture in the tank, and then pressurized and sealed by adding dry air, so the moisture in the tank did not condense when pressurized and sealed with dry air. It is possible to prevent a significant decrease in insulation performance due to condensation of the installed electrical equipment.

実施の形態１．
図１はこの発明の実施の形態１が適用されるガス絶縁開閉装置の構成を示す断面図である。図２は水分吸着剤の収容ケースを示し、その（ａ）は正面図、及びその（ｂ）は断面図である。図において、ガス絶縁開閉装置１には、絶縁ガス（絶縁媒体）である乾燥空気が加圧充填されるタンク（ガスタンク）２が備えられ、そのタンク２内には、主回路導体３，４と、主回路導体３，４間に接続された真空バルブ５と、真空バルブ５の一端子６を主回路導体３及び接地端子７にそれぞれ接続する断路器・接地開閉器８と、タンク２の底部に設置固定される水分吸着剤収容ケース９とが設けられている。 Embodiment 1 FIG.
1 is a cross-sectional view showing a configuration of a gas insulated switchgear to which Embodiment 1 of the present invention is applied. FIG. 2 shows a storage case for a moisture adsorbent, in which (a) is a front view and (b) is a cross-sectional view. In the figure, a gas-insulated switchgear 1 is provided with a tank (gas tank) 2 that is pressurized and filled with dry air, which is an insulating gas (insulating medium), and in the tank 2, main circuit conductors 3, 4 and , A vacuum valve 5 connected between the main circuit conductors 3, 4, a disconnector / grounding switch 8 for connecting one terminal 6 of the vacuum valve 5 to the main circuit conductor 3 and the grounding terminal 7, and the bottom of the tank 2. There is provided a moisture adsorbent storage case 9 that is installed and fixed to the housing.

ガス絶縁開閉装置１のタンク２の外部には、真空バルブ５を有する真空遮断器の操作機構１０と、断路器・接地開閉器８の操作機構１１と、プラグイン型ケーブル端末１２とが据付けられている。水分吸着剤収容ケース９は、図２に示すように、ケース板１３に例えば合成ゼオライト，シリカゲル等の水分吸着剤１４を載せて、空気が十分に出入する小透孔を有するサポート板１５で保持されて構成されている。水分吸着剤１４は通気性のある収納袋に入れ吸着剤が砕けた場合でも外部にこぼれ出ないようにしてある。水分吸着剤収容ケース９のケース板１３は、タンク２の底板に設けた開口を塞ぐ蓋を兼ねており、タンク２内に水分吸着剤１４とサポート板１５を張り出させ、Ｏリングまたはゴムパッキン（図示せず）を介してタンク底板に気密にボルト締めされている。   Outside the tank 2 of the gas-insulated switchgear 1, an operating mechanism 10 for a vacuum circuit breaker having a vacuum valve 5, an operating mechanism 11 for a disconnecting / grounding switch 8, and a plug-in cable terminal 12 are installed. ing. As shown in FIG. 2, the moisture adsorbent storage case 9 is held by a support plate 15 having a small through hole through which air can sufficiently enter and exit by placing a moisture adsorbent 14 such as synthetic zeolite or silica gel on the case plate 13. Has been configured. The moisture adsorbent 14 is placed in a breathable storage bag so that it does not spill outside even when the adsorbent is crushed. The case plate 13 of the moisture adsorbent storage case 9 also serves as a lid that closes the opening provided in the bottom plate of the tank 2. The moisture adsorbent 14 and the support plate 15 are overhanged in the tank 2, and an O-ring or rubber packing is used. It is bolted to the tank bottom plate airtightly (not shown).

ガス絶縁開閉装置１の製造されたタンクは、機器の組み立て後、絶縁ガスを導入し加圧密封されるが、実施の形態１において、ガス絶縁開閉装置１のタンク２内に絶縁ガスである乾燥空気を導入し加圧密封するに当たっては次のような工程で処理される。
工程１：空気が入ったガス絶縁開閉装置のタンク内の水分量を推定する。なお、ガス絶縁開閉装置のタンク内に初期に入る空気は、工場のクリーンルームの清浄な空気を用いるのが好ましい。このとき、空気には湿度分の水分が入っている。
工程２：タンク密封後、運転中、即ち、タンクを次回に開放するまで、または製品期待寿命の間にタンク内に侵入する水分量を推定する。
工程３：タンク内水分量と運転中に侵入する水分量との両水分量を少なくとも吸着し得るに足る量の水分吸着剤をタンク内に設置する。
工程４：タンク内の水分および空気を真空引きおよびガス置換等によってタンク外に排出せずに、タンク内に乾燥空気を加えて定格圧まで加圧し密封する。 The tank in which the gas-insulated switchgear 1 is manufactured is pressurized and sealed after introducing the insulating gas after the assembly of the device. In the first embodiment, the tank 2 of the gas-insulated switchgear 1 is dried as the insulating gas. When air is introduced and sealed under pressure, it is processed in the following steps.
Step 1: Estimate the amount of water in the tank of the gas insulated switchgear containing air. In addition, it is preferable to use clean air in a clean room of a factory as the air that initially enters the tank of the gas insulated switchgear. At this time, moisture contains moisture corresponding to humidity.
Step 2: After the tank is sealed, the amount of moisture that enters the tank during operation, that is, until the tank is opened next time or during the expected product life is estimated.
Step 3: A moisture adsorbent in an amount sufficient to adsorb both the moisture content in the tank and the moisture content that enters during operation is installed in the tank.
Step 4: Water and air in the tank are not discharged out of the tank by evacuation or gas replacement, but dry air is added to the tank to pressurize to the rated pressure and seal.

上記工程１においては、タンク内の水分量を推定する工程であり、この水分量は、タンク内の空気中の水分量とタンク内の有機絶縁材料から析出する水分量との合計である。
タンク内の空気中の水分量は、タンク内の空間容積，気温，湿度，気圧に基因して計算される。タンク内の空間容積はタンク容積で概略置換してもよい。
この水分量は次の式で求めることができる。
水分量＝飽和水蒸気量×相対湿度×空間容積×圧力 The step 1 is a step of estimating the amount of moisture in the tank, and this amount of moisture is the sum of the amount of moisture in the air in the tank and the amount of moisture deposited from the organic insulating material in the tank.
The amount of moisture in the air in the tank is calculated based on the space volume in the tank, temperature, humidity, and atmospheric pressure. The space volume in the tank may be roughly replaced with the tank volume.
This amount of water can be determined by the following equation.
Moisture content = saturated water vapor content x relative humidity x space volume x pressure

タンク内の有機絶縁材料から析出する水分量は、例えば、次の程度である。
エポキシ樹脂注型絶縁物では ０．３ｗｔ％
なお、有機絶縁材料から析出する水分量の合計が少ない場合は無視してもよい。 The amount of water deposited from the organic insulating material in the tank is, for example, as follows.
0.3 wt% for epoxy resin cast insulation
Note that when the total amount of water deposited from the organic insulating material is small, it may be ignored.

上記工程２においては、運転中、即ち、タンク密封後タンクを次回に開放するまで、または製品期待寿命の間に外部からタンク内に経年的に侵入する水分量を推定する。これはガス絶縁開閉装置の構造にも基因するが、例えば、次の程度である。
図１の形態において、水分量＝１．８ｇ／年 In step 2, the amount of moisture that enters the tank over time from the outside during operation, that is, until the tank is opened next time after the tank is sealed or during the expected product life, is estimated. This is due to the structure of the gas insulated switchgear, but for example, is as follows.
In the form of FIG. 1, water content = 1.8 g / year

上記工程３においては、上記工程１と工程２で推定した両水分量を少なくとも吸着し得るに量の水分吸着剤をタンク内に設置する。両水分量を吸着し得るに足る量の水分吸着剤を求め、それに余裕度をプラスして水分吸着剤の量を求めるとよい。
水分吸着剤である例えば合成ゼオライトの水分吸着量は例えば、次のようである。
合成ゼオライトの許容水分吸着量＝２５ｗｔ％ In the step 3, an amount of moisture adsorbent is installed in the tank so that at least the moisture amounts estimated in the steps 1 and 2 can be adsorbed. It is preferable to obtain an amount of moisture adsorbent sufficient to adsorb both amounts of moisture, and add the margin to the amount of moisture adsorbent.
The moisture adsorption amount of, for example, synthetic zeolite, which is a moisture adsorbent, is as follows, for example.
Allowable water adsorption amount of synthetic zeolite = 25wt%

上記工程４においては、タンク内の水分および空気を真空引きおよびガス置換等によってタンク外に排出せずに、タンク内に乾燥空気を加えて定格圧まで加圧し密封する。ガス絶縁開閉装置では、図３に示すように、例えば、定格電圧（ｋＶ）に対して、定格ガス圧力（ＭＰａ―Ｇ）に示す圧力にまで加圧される。なお、ＭＰａ―Ｇは大気圧に対してさらに加圧される圧力を示しており、図３の例では、機種名Ｃ−ＧＩＳの定格電圧３６ｋＶでは、大気圧にさらに０．１５ＭＰａだけ加圧されることを示している。
そのため、必要量の水分吸着剤が設置されたタンクに、タンク内の水分および空気を真空引きおよびガス置換等によってタンク外に排出せずに、乾燥空気を加えて定格圧程度まで加圧し密封する。これで、ガス絶縁開閉装置の絶縁ガス封入工程が完了する。 In step 4 above, moisture and air in the tank are not discharged outside the tank by evacuation, gas replacement, or the like, but dry air is added to the tank to pressurize to the rated pressure and seal. In the gas-insulated switchgear, as shown in FIG. 3, for example, the pressure is increased to the pressure indicated by the rated gas pressure (MPa-G) with respect to the rated voltage (kV). Note that MPa-G indicates a pressure that is further increased with respect to the atmospheric pressure. In the example of FIG. 3, when the rated voltage is 36 kV of the model name C-GIS, the pressure is further increased by 0.15 MPa to the atmospheric pressure. Which indicates that.
Therefore, dry air is added to the tank where the required amount of moisture adsorbent is installed without evacuating the tank from the tank by evacuation or gas replacement, etc. . This completes the insulating gas filling process of the gas insulated switchgear.

このように、実施の形態１では、絶縁ガスを乾燥空気とするガス絶縁開閉装置であって、清浄な空気が入ったままのタンク内に、タンク内に残留する水分量と、タンク密封後タンクを次回に開放するまで、または製品期待寿命の間にタンク内に侵入する水分量とを少なくとも吸着し得る水分吸着剤を設置し、その後、タンク内の水分および空気を真空引きおよびガス置換等によってタンク外に排出することなく、タンク内に乾燥空気を加えて定格圧まで加圧し密封するようにしたものである。   As described above, in the first embodiment, a gas-insulated switchgear using insulating gas as dry air, the amount of moisture remaining in the tank and the tank after the tank is sealed in the tank in which clean air remains. Install a moisture adsorbent that can absorb at least the amount of moisture that enters the tank during the product's expected life, and then evacuate and replace the moisture and air in the tank. Without discharging to the outside of the tank, dry air is added to the tank to pressurize to the rated pressure and seal.

そのため、清浄な空気が入ったままで、水分吸着剤が設置されたタンク内に、真空引きやガス置換のガス処理をせずに、絶縁ガスである乾燥空気を加えて定格圧まで加圧し密封することができ、ガス処理時間を大幅に短縮することができると共に、コスト高を防ぐことができる。合わせて、乾燥空気の使用量を減らすことができ、絶縁開閉装置のタンクは真空に耐える強度を必要としない。また、ＳＦ６ガスに存在する公害問題も発生しない。 Therefore, with the clean air still in the tank where the moisture adsorbent is installed, without applying vacuum or gas replacement gas treatment, add dry air, which is an insulating gas, to pressurize to the rated pressure and seal it. As a result, the gas processing time can be greatly shortened, and the cost can be prevented. In addition, the amount of dry air used can be reduced, and the tank of the insulated switchgear does not need the strength to withstand vacuum. Also, it does not also occur pollution problems that exist in the SF 6 gas.

実施の形態２．
ガス絶縁開閉装置への乾燥空気の導入工程において、清浄な空気を入れた状態で乾燥空気をタンク内に導入すると、結露することがある。図４は清浄な空気が入ったタンクにおける温度と相対湿度との関係を示す図である。温度２５℃で相対湿度７０％である清浄な空気は、温度１８．５℃程に低下すると結露が発生する。そのため、水分吸着剤を設置したタンク内に、清浄な空気の相対湿度のまま、直ちに乾燥空気を導入すると、乾燥空気のボンベからの膨張現象により、乾燥空気補給時にタンク内温度が低下し結露に至ることがある。これを防止するために、清浄な空気が入ったタンク内に水分吸着剤を設置した状態で、直ちに乾燥空気補給を行わないで、放置し、十分に相対湿度が低下してから、乾燥空気補給を行うようにすることにより、結露を防ぐことができる。 Embodiment 2. FIG.
In the process of introducing dry air into the gas insulated switchgear, if dry air is introduced into the tank while clean air is introduced, condensation may occur. FIG. 4 is a diagram showing the relationship between temperature and relative humidity in a tank containing clean air. When clean air having a relative humidity of 70% at a temperature of 25 ° C. is reduced to a temperature of about 18.5 ° C., condensation occurs. For this reason, if dry air is immediately introduced into the tank where the moisture adsorbent is installed while maintaining the relative humidity of clean air, the temperature inside the tank will drop when dry air is replenished due to the expansion phenomenon of the dry air, causing condensation. Sometimes. To prevent this, with the moisture adsorbent installed in a tank containing clean air, do not immediately replenish the dry air, leave it, and after the relative humidity has dropped sufficiently, replenish the dry air. By doing so, condensation can be prevented.

図５は水分吸着剤を入れた密封容器中の絶対湿度と放置時間との関係を示す図である。一例では、１ｍ3当たり１３００ｇの合成ゼオライトを入れたときの、放置時間と絶対湿度ｇ／ｍ3の関係を示している。４時間程度で大部分の水分を吸着し得ることを示している。また、１ｍ3当たり２８０００ｇの合成ゼオライトを入れたときの、放置時間と絶対湿度ｇ／ｍ3の関係を示している。１時間程度で大部分の水分を吸着し得ることを示している。 FIG. 5 is a diagram showing the relationship between the absolute humidity in the sealed container containing the moisture adsorbent and the standing time. In one example, when inserting a synthetic zeolite of 1 m 3 per 1300 g, it shows the relationship between the standing time and absolute humidity g / m 3. It shows that most of the water can be adsorbed in about 4 hours. Further, when inserting the synthetic zeolite 1 m 3 per 28000 g, it shows the relationship between the standing time and absolute humidity g / m 3. It shows that most of the water can be adsorbed in about 1 hour.

このように、実施の形態２では、清浄な空気が入ったガス絶縁開閉装置に水分吸着剤を設置し、この状態でタンクを密封して、タンク内の水分が乾燥空気を加えタンクがガス絶縁開閉装置の定格ガス圧まで加圧されたときに結露しないように、上記水分吸着剤がタンク内の水分を吸着するに必要とする時間放置し、その後、乾燥空気を加え加圧して密封するようにした。
このようにすることにより、乾燥空気を加え加圧密封したときにタンク内の水分が結露しないから、タンク内収納機器の結露による絶縁性能の著しい低下を防止することができる。 As described above, in the second embodiment, the moisture adsorbent is installed in the gas-insulated switchgear containing clean air, and the tank is sealed in this state. The moisture in the tank adds dry air and the tank is gas-insulated. To prevent condensation when pressurized to the rated gas pressure of the switchgear, leave the moisture adsorbent for the time required to adsorb moisture in the tank, and then pressurize and seal with dry air. I made it.
By doing so, since moisture in the tank does not condense when pressurized and sealed with dry air, it is possible to prevent a significant decrease in insulation performance due to condensation of the storage device in the tank.

この発明の実施の形態１が適用されるガス絶縁開閉装置の構成を示す断面図である。It is sectional drawing which shows the structure of the gas insulated switchgear to which Embodiment 1 of this invention is applied. 実施の形態１における水分吸着剤の収容ケースを示し、その（ａ）は正面図、及びその（ｂ）は断面図である。The storage case of the water | moisture-content adsorption agent in Embodiment 1 is shown, The (a) is a front view, The (b) is sectional drawing. ガス絶縁開閉装置において、定格電圧（ｋＶ）に対して、定格ガス圧力（ＭＰａ―Ｇ）にまで加圧される例を示す図であるIn a gas insulated switchgear, it is a figure which shows the example pressurized to rated gas pressure (MPa-G) with respect to rated voltage (kV). 清浄な空気が入ったタンクにおける温度と相対湿度との関係を示す図である。It is a figure which shows the relationship between the temperature in a tank with clean air, and relative humidity. 水分吸着剤を入れた密封容器中の絶対湿度と放置時間との関係を示す図である。It is a figure which shows the relationship between the absolute humidity in the sealed container which put the water | moisture-content adsorption agent, and leaving time.

符号の説明Explanation of symbols

１ ガス絶縁開閉装置 ２ タンク
３ 主回路導体 ４ 主回路導体
５ 真空バルブ ６ 真空バルブの一端子
７ 接地端子 ８ 断路器・接地開閉器
９ 水分吸着剤収容ケース １０ 真空遮断器の操作機構
１１ 断路器・接地開閉器の操作機構 １２ プラグイン型ケーブル端末
１３ ケース板 １４ 水分吸着剤
１５ サポート板 DESCRIPTION OF SYMBOLS 1 Gas insulation switchgear 2 Tank 3 Main circuit conductor 4 Main circuit conductor 5 Vacuum valve 6 One terminal of a vacuum valve 7 Grounding terminal 8 Disconnector / grounding switch 9 Moisture adsorbent accommodation case 10 Vacuum breaker operation mechanism 11 Disconnector・ Grounding switch operation mechanism 12 Plug-in cable terminal 13 Case plate 14 Moisture absorbent 15 Support plate

Claims (3)

電気機器が設置され絶縁ガスを乾燥空気とするタンクを備えるガス絶縁開閉装置の絶縁ガス封入方法であって、
空気が入ったままの状態で上記タンクを密封する場合に、上記タンク内に残留する水分量、及び上記タンク密封後上記タンクを次回に開放するまで、または製品期待寿命の間に上記タンク内に侵入する水分量との合計の水分量を求める工程と、
求められた合計の水分量を少なくとも吸着する水分吸着剤を上記タンク内に設置する工程と、
上記水分吸着剤を上記タンク内に設置後、上記タンク内の水分が、乾燥空気を加え上記タンクがガス絶縁開閉装置の定格ガス圧まで加圧されたときに結露しないように、上記水分吸着剤が上記タンク内の水分を吸着するに必要とする時間放置する工程と、
上記放置後に上記タンク内に乾燥空気を加えて加圧し上記タンクを密封する工程と
を含むガス絶縁開閉装置の絶縁ガス封入方法。 An insulating gas sealing method for a gas insulated switchgear comprising a tank in which electrical equipment is installed and the insulating gas is dry air,
When sealing the tank with air in the tank, the amount of water remaining in the tank and the tank until the tank is opened next time after the tank is sealed, or during the expected life of the product. A step of determining the total amount of moisture with the amount of moisture entering,
Installing in the tank a water adsorbent that adsorbs at least the total amount of water determined;
After the moisture adsorbent is installed in the tank, the moisture adsorbent is used to prevent condensation in the tank when dry air is added and the tank is pressurized to the rated gas pressure of the gas insulated switchgear. Leaving the time required for adsorbing the water in the tank,
An insulating gas sealing method for a gas-insulated switchgear, comprising the step of adding dry air to the tank and pressurizing the tank after the standing to seal the tank. 上記水分吸着剤を上記タンク内に設置後、上記タンク内の水分および空気を真空引き及びガス置換によってタンク外に排出せずに、上記タンク内に乾燥空気を加えて加圧し上記タンクを密封するようにした請求項１記載のガス絶縁開閉装置の絶縁ガス封入方法。 After installing the moisture adsorbent in the tank, the moisture and air in the tank are not exhausted outside the tank by evacuation and gas replacement, but dry air is added to the tank and pressurized to seal the tank. An insulating gas sealing method for a gas insulated switchgear according to claim 1 as described above. 電気機器が設置され絶縁ガスを乾燥空気とするタンクを備えるガス絶縁開閉装置の製造方法であって、
空気が入ったままの状態で上記タンクを密封した場合に、上記タンク内に残留する水分量、及び上記タンク密封後上記タンクを次回に開放するまで、または製品期待寿命の間に上記タンク内に侵入する水分量との合計の水分量を求める工程と、
求められた合計の水分量を少なくとも吸着する水分吸着剤を上記タンク内に設置する工程と、
上記水分吸着剤を上記タンク内に設置後、上記タンク内の水分が、乾燥空気を加え上記タンクがガス絶縁開閉装置の定格ガス圧まで加圧されたときに結露しないように、上記水分吸着剤が上記タンク内の水分を吸着するに必要とする時間放置する工程と、
上記放置後に上記タンク内に乾燥空気を加えて加圧し上記タンクを密封する工程とを含むガス絶縁開閉装置の製造方法。
A method for manufacturing a gas-insulated switchgear comprising a tank in which electrical equipment is installed and an insulating gas is used as dry air ,
When the tank is sealed with air in the tank, the amount of water remaining in the tank, and until the tank is opened next time after the tank is sealed, or during the expected life of the product. A step of determining the total amount of moisture with the amount of moisture entering,
Installing in the tank a water adsorbent that adsorbs at least the total amount of water determined;
After the moisture adsorbent is installed in the tank, the moisture adsorbent is used to prevent condensation in the tank when dry air is added and the tank is pressurized to the rated gas pressure of the gas insulated switchgear. Leaving the time required for adsorbing the water in the tank,
A method of manufacturing a gas-insulated switchgear, comprising: a step of applying dry air to the tank after the standing and pressurizing the tank to seal the tank.
JP2005287917A 2005-09-30 2005-09-30 Insulating gas sealing method for gas insulated switchgear and method for manufacturing gas insulated switchgear Active JP4637708B2 (en)

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KR100959521B1 (en) 2009-10-06 2010-05-27 홍정애 Load break switchgear panel of vacuum interrupter arc extinguishing type and cubicle switchgear having this
JP6625053B2 (en) * 2013-11-12 2019-12-25 アーベーベー・シュバイツ・アーゲー Water and contaminant sorbents for CO2 insulated electrical equipment for producing, transmitting, distributing and / or using electrical energy
JP6430280B2 (en) * 2015-02-16 2018-11-28 東京電力ホールディングス株式会社 Gas insulated switchgear and gas replacement method thereof
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