JPS6224925B2 - - Google Patents
Info
- Publication number
- JPS6224925B2 JPS6224925B2 JP8134880A JP8134880A JPS6224925B2 JP S6224925 B2 JPS6224925 B2 JP S6224925B2 JP 8134880 A JP8134880 A JP 8134880A JP 8134880 A JP8134880 A JP 8134880A JP S6224925 B2 JPS6224925 B2 JP S6224925B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- oil
- membranes
- electrical equipment
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012528 membrane Substances 0.000 claims description 23
- 239000011261 inert gas Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 9
- 230000006378 damage Effects 0.000 description 6
- 238000012806 monitoring device Methods 0.000 description 5
- 230000010349 pulsation Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Description
【発明の詳細な説明】
本発明は油入電気機器例えば変圧器の特に防災
構造に関するものである。電気機器本体と絶縁油
を収納するタンク内部において、内部事故が発生
し、アークが生じた場合油の分解ガスの発生によ
りタンク内圧は急激に上昇する。このため従来の
変圧器ではタンクの上部に屈曲した放圧管を介し
て放圧装置が配設されている。これにより、小さ
な内部短絡事故では、タンクの膨らみ変形による
容積増加と放圧装置からの油の放出により前記圧
力上昇を緩和することができる。しかし大きな系
統容量に連結された変圧器における内部事故の場
合は、その急激な圧力上昇をタンク膨張量と放圧
装置の油の放出では緩和出来ず、タンクが破壊
し、高温のガスおよび油を噴出することがある。
更に噴出された高温ガスおよび油は大気中の酸素
に触れ着火し、火災事故等の大きな二次的災害に
発展するおそれがある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disaster prevention structure of oil-filled electrical equipment, such as a transformer. If an internal accident occurs and an arc occurs inside the tank that houses the electrical equipment body and insulating oil, the internal pressure of the tank will rise rapidly due to the generation of oil decomposition gas. For this reason, in conventional transformers, a pressure relief device is provided above the tank via a bent pressure relief pipe. As a result, in the event of a small internal short circuit accident, the pressure increase can be alleviated by increasing the volume due to expansion and deformation of the tank and releasing oil from the pressure relief device. However, in the case of an internal accident in a transformer connected to a large system capacity, the sudden pressure rise cannot be alleviated by the amount of tank expansion and the release of oil from the pressure relief device, and the tank ruptures, releasing hot gas and oil. It may gush out.
Furthermore, the ejected high-temperature gas and oil may come into contact with oxygen in the atmosphere and ignite, leading to a major secondary disaster such as a fire.
本発明は上記のような欠点を解消し、内部短絡
事故点にできるだけ近く避圧ユニツトを配設して
タンク内圧力に対する動作の速応性を高め、ガス
や油の流出を容易にすると共に、放出された高温
のガスおよび油を完全に収容できる容積の避圧室
を設けてガスや油を油入電気機器の外部に流出さ
せないようにし、公害や火災等のより重大な２次
災害を未然に防止できる油入電気機器を提供する
ものである。 The present invention solves the above-mentioned drawbacks by arranging an escape pressure unit as close as possible to the point of an internal short-circuit accident, increasing the quick response to the pressure inside the tank, facilitating the leakage of gas and oil, and preventing the release of gas or oil. An escape pressure chamber with a volume that can completely contain the high-temperature gas and oil that has been removed is installed to prevent the gas and oil from leaking outside the oil-filled electrical equipment, thereby preventing more serious secondary disasters such as pollution and fire. The purpose is to provide oil-filled electrical equipment that can prevent
以下本発明を図面に示した一実施例により説明
する。変圧器本体中身１と絶縁油２を収納したタ
ンク３の側壁には内部事故時の内圧上昇を放圧す
るための比較的大きな避圧ユニツト５が設けられ
ている。この避圧ユニツト５はタンク内圧を放圧
するものであり、変圧器本体中身１に出来る限り
近い位置のタンク３の周壁に取付けられる。避圧
ユニツト５の取付け位置はタンク３の上部あるい
は底部であつても良い。 The present invention will be explained below with reference to an embodiment shown in the drawings. A relatively large pressure relief unit 5 is provided on the side wall of a tank 3 containing the transformer main body contents 1 and insulating oil 2 to relieve the rise in internal pressure in the event of an internal accident. This pressure relief unit 5 relieves the internal pressure of the tank, and is attached to the peripheral wall of the tank 3 at a position as close as possible to the transformer main body contents 1. The pressure relief unit 5 may be installed at the top or bottom of the tank 3.
避圧ユニツト５は避圧室７と接続管６で連通さ
れている。避圧ユニツト５には接続管６の途中に
複数枚の避圧膜８Ａ，８Ｂが備えられ、その避圧
膜８Ａ，８Ｂ間には不活性ガスが挿入されてい
る。この不活性ガスの圧力は圧力監視装置９でモ
ニターされ、不活性ガス圧力が選定された圧力許
容範囲から外れると不活性ガス供給源に接続され
た圧力調整機１０によつてコントロールされるよ
うになつている。又避圧膜８Ａ，８Ｂ間には油漏
れを検知する漏油検出器１５が設けられていると
共に弁１１を介して真空室あるいは負圧室１２が
連通されている。この弁１１はブツフホルツリレ
ー、ロゴスキーコイル、マイクロフオン等の機械
的、電気的に内部事故を検出する検出器からの信
号によつて作動するようになつている。真空室あ
るいは負圧室１２には、内部の圧力を監視する装
置１３および真空ポンプ１４が設けられ、真空室
あるいは負圧室１２内の圧力をコントロールする
ようになつている。 The pressure evacuation unit 5 is communicated with the evacuation chamber 7 through a connecting pipe 6. The pressure relief unit 5 is provided with a plurality of pressure relief membranes 8A, 8B in the middle of the connecting pipe 6, and an inert gas is inserted between the pressure relief membranes 8A, 8B. The pressure of this inert gas is monitored by a pressure monitoring device 9 and controlled by a pressure regulator 10 connected to an inert gas supply when the inert gas pressure deviates from a selected pressure tolerance range. It's summery. An oil leakage detector 15 for detecting oil leakage is provided between the pressure avoidance membranes 8A and 8B, and is communicated with a vacuum chamber or negative pressure chamber 12 via a valve 11. This valve 11 is operated by a signal from a mechanical or electrical detector such as a Buchholz relay, Rogowski coil, or microphone for detecting an internal accident. The vacuum chamber or negative pressure chamber 12 is provided with a device 13 for monitoring internal pressure and a vacuum pump 14 to control the pressure inside the vacuum chamber or negative pressure chamber 12.
ところで、通常変圧器タンク３の内圧強度は３
〜４Kg/cm2である。変圧器タンク３の破壊を防止
する避圧ユニツト５の避圧膜８Ａ，８Ｂの破壊強
度は出来る限り低いことが必要であるが、しかし
ながら変圧器の寿命迄の避圧膜８Ａ，８Ｂの耐久
性、地震時の油圧脈動、油圧ポンプ起動停止に伴
う油圧脈動に対する耐疲労強度等を考えると、一
概に低く出来ない。従つて避圧ユニツト５の避圧
膜８Ａ，８Ｂの破壊圧を低くして変圧器タンク３
の破壊防止を計ると同時に避圧膜８Ａ，８Ｂの耐
疲労強度対策をも備えた避圧ユニツト５を変圧器
タンク３に備えることが必要である。そこで避圧
膜８Ａと避圧膜８Ｂ間には変圧器タンク３内の圧
力P1と比べ、避圧膜８Ａ，８Ｂの破壊に影響しな
い範囲の圧力P2の不活性ガスを封入する。これに
より、今、変圧器内部に短絡事故が発生すると、
検出器からの信号により、弁１１が高速で開口
し、圧力P2の不活性ガスは真空室あるいは負圧室
１２に急速放出され、避圧膜８Ａと避圧膜８Ｂ間
の圧力P2が急激に低下する。従つて変圧器内部の
上昇した圧力P′1と放圧された避圧膜８Ａ，８Ｂ
間の圧力P′2の差圧（P′1−P′2）が大きくなり、こ
れが避圧膜８Ａの破壊圧に達すると、各避圧膜８
Ａ，８Ｂが破壊して変圧器タンク３内の分解ガス
や油が急速に避圧室７内に放出され、これにより
変圧器タンク３内の圧力上昇を緩和してその破壊
を防止することができる。 By the way, the internal pressure strength of the transformer tank 3 is usually 3
~4Kg/ cm2 . The breaking strength of the escape pressure membranes 8A, 8B of the escape pressure unit 5, which prevents the destruction of the transformer tank 3, must be as low as possible; however, the durability of the escape pressure membranes 8A, 8B until the life of the transformer is Considering the fatigue strength against hydraulic pulsations during earthquakes, hydraulic pulsations caused by starting and stopping hydraulic pumps, etc., it cannot be lowered in any way. Therefore, the burst pressure of the pressure protection membranes 8A and 8B of the pressure protection unit 5 is lowered to reduce the pressure in the transformer tank 3.
It is necessary to provide the transformer tank 3 with a pressure relief unit 5 which is designed to prevent destruction of the pressure relief membranes 8A and 8B and at the same time provide measures against fatigue strength of the pressure relief membranes 8A and 8B. Therefore, an inert gas having a pressure P2 within a range that does not affect the destruction of the pressure relief membranes 8A and 8B compared to the pressure P1 in the transformer tank 3 is sealed between the pressure relief membranes 8A and 8B. As a result, if a short circuit occurs inside the transformer,
In response to a signal from the detector, the valve 11 opens at high speed, and the inert gas at pressure P 2 is rapidly released into the vacuum chamber or negative pressure chamber 12, and the pressure P 2 between the pressure relief membrane 8A and the pressure relief membrane 8B increases. Declines rapidly. Therefore, the increased pressure P′ 1 inside the transformer and the released pressure relief membranes 8A, 8B
When the pressure difference (P ' 1 - P' 2 ) between the
A and 8B are destroyed, and the decomposed gas and oil in the transformer tank 3 are rapidly released into the pressure escape chamber 7, which alleviates the pressure rise in the transformer tank 3 and prevents its destruction. can.
このように、避圧膜８Ａ，８Ｂ間に所定の圧力
で不活性ガスを封入することにより、避圧膜８
Ａ，８Ｂの耐圧強度はほぼ（P2−P′2）分だけ低く
できるので、変圧器タンク３の破壊防止性能が向
上する。しかも避圧膜８Ａ，８Ｂはこれに作用す
る圧力差が小さいため、それ自身の油圧脈動等に
対する耐疲労強度も向上する。この場合、避圧膜
８Ａ，８Ｂや、不活性ガス圧力P2と真空室あるい
は負圧室１２の圧力、容積を種々変更することに
より、避圧膜８Ａ，８Ｂの作動圧を変えることが
できることは勿論である。また、不活性ガス圧力
監視装置９、圧力調整機１０、真空室あるいは負
圧室１２の圧力監視装置１３、真空室ポンプ１
４、漏油検知装置１５は避圧ユニツト５のメンテ
ナンス上備えられるものである。 In this way, by filling inert gas at a predetermined pressure between the pressure relief membranes 8A and 8B, the pressure relief membrane 8
Since the pressure strength of A and 8B can be lowered by approximately (P 2 -P' 2 ), the ability to prevent the transformer tank 3 from breaking is improved. Moreover, since the pressure difference acting on the pressure relief membranes 8A and 8B is small, their own fatigue resistance against hydraulic pulsations and the like is improved. In this case, the operating pressure of the pressure relief membranes 8A, 8B can be changed by variously changing the pressure and volume of the pressure relief membranes 8A, 8B, the inert gas pressure P2 , the vacuum chamber, or the negative pressure chamber 12. Of course. Also, an inert gas pressure monitoring device 9, a pressure regulator 10, a pressure monitoring device 13 for the vacuum chamber or negative pressure chamber 12, and a vacuum chamber pump 1
4. The oil leak detection device 15 is provided for maintenance of the pressure relief unit 5.
以上述べたように、本発明による油入電気機器
においては、内部事故時の異常なタンク内圧上昇
に対して、急速に内部圧力を放圧し、タンクの破
壊を防止し、高温のガス及び油の噴出による周辺
機器の損傷、大気中の酸素にふれて着火し火災等
のより重大な２次災害を防止することが出来る。 As described above, in the oil-filled electrical equipment according to the present invention, when an abnormal tank internal pressure rises in the event of an internal accident, the internal pressure is rapidly released, preventing tank destruction, and preventing high-temperature gas and oil from rising. It can prevent more serious secondary disasters such as damage to peripheral equipment due to eruptions and fires caused by ignition due to exposure to oxygen in the atmosphere.
図面は本発明による油入電気機器の一実施例を
示す断面図である。
１…変圧器本体中身、２…絶縁油、３…タン
ク、５…避圧ユニツト、６…接続管、７…避圧
室、８Ａ，８Ｂ…避圧膜、９…圧力監視装置、１
０…圧力調整機、１１…弁、１２…真空室あるい
は負圧室、１３…圧力監視装置、１４…真空ポン
プ、１５…漏油検知装置。
The drawing is a sectional view showing an embodiment of an oil-filled electrical device according to the present invention. 1...Contents of transformer body, 2...Insulating oil, 3...Tank, 5...Evacuation unit, 6...Connecting pipe, 7...Evacuation chamber, 8A, 8B...Evacuation membrane, 9...Pressure monitoring device, 1
0...Pressure regulator, 11...Valve, 12...Vacuum chamber or negative pressure chamber, 13...Pressure monitoring device, 14...Vacuum pump, 15...Oil leak detection device.
Claims (1)
収納し、且つ絶縁油を充填したタンクの外壁部に
常時は油密に閉塞され、タンク内の過圧力により
その閉塞が開かれ避圧室と連通するよう接続構成
された避圧ユニツトを有する油入電気機器におい
て、前記避圧ユニツトは避圧膜を複数枚有し、そ
れら避圧膜間に設定された圧力で不活性ガスを封
入するとともに、この不活性ガスを変圧器内部事
故時に外部に放出する弁を備えてなることを特徴
とする油入電気機器。 ２ 避圧膜間には弁を介して真空室あるいは負圧
室が連通されていることを特徴とする特許請求の
範囲第１項記載の油入電気機器。 ３ 避圧膜間には常時における油入電気機器から
の漏油を検知するための漏油検知装置が設けられ
ていることを特徴とする特許請求の範囲第１項記
載の油入電気機器。[Scope of Claims] 1. The outer wall of a tank that houses the main body of electrical equipment or its attached electrical equipment and is filled with insulating oil is always oil-tightly closed, and the blockage is opened by overpressure inside the tank. In oil-filled electrical equipment having an escape pressure unit configured to communicate with an escape pressure chamber, the escape pressure unit has a plurality of escape pressure membranes, and inert gas is ejected at a pressure set between the escape pressure membranes. 1. An oil-filled electrical device characterized by being equipped with a valve that discharges this inert gas to the outside in the event of an accident inside the transformer. 2. The oil-filled electrical equipment according to claim 1, characterized in that a vacuum chamber or a negative pressure chamber is communicated between the pressure avoidance membranes via a valve. 3. The oil-filled electrical equipment according to claim 1, characterized in that an oil leakage detection device for constantly detecting oil leakage from the oil-filled electrical equipment is provided between the pressure relief membranes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8134880A JPS577909A (en) | 1980-06-18 | 1980-06-18 | Oil filled electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8134880A JPS577909A (en) | 1980-06-18 | 1980-06-18 | Oil filled electric equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS577909A JPS577909A (en) | 1982-01-16 |
| JPS6224925B2 true JPS6224925B2 (en) | 1987-05-30 |
Family
ID=13743854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8134880A Granted JPS577909A (en) | 1980-06-18 | 1980-06-18 | Oil filled electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS577909A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS596509A (en) * | 1982-07-05 | 1984-01-13 | Fuji Electric Co Ltd | Gas insulation transformer with on-load tap changer |
| FR2791463B1 (en) * | 1999-03-22 | 2001-06-29 | Philippe Magnier | DEVICE FOR PREVENTION AGAINST EXPLOSION OF ELECTRICAL TRANSFORMERS |
| FR2888034B1 (en) * | 2005-06-29 | 2010-10-08 | Philippe Magnier | DEVICE FOR PREVENTING THE EXPLOSION OF AN ELECTRICAL TRANSFORMER |
| EP2076909A1 (en) | 2006-10-27 | 2009-07-08 | Philippe Magnier LLC | Device for prevention against the explosion of an electric transformer member |
| US8710946B2 (en) | 2008-09-17 | 2014-04-29 | General Electric Company | Rupture resistant system |
| US8717134B2 (en) * | 2008-09-17 | 2014-05-06 | General Electric Company | System with directional pressure venting |
| US9159482B2 (en) | 2008-09-17 | 2015-10-13 | General Electric Company | Rupture resistant tank system |
| CN105575654A (en) * | 2014-10-17 | 2016-05-11 | 特变电工沈阳变压器集团有限公司 | Transformer main insulation structure and implementation method thereof |
-
1980
- 1980-06-18 JP JP8134880A patent/JPS577909A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS577909A (en) | 1982-01-16 |
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