JPH08308046A - Internal accident sensor for gas insulated apparatus - Google Patents
Internal accident sensor for gas insulated apparatusInfo
- Publication number
- JPH08308046A JPH08308046A JP7109305A JP10930595A JPH08308046A JP H08308046 A JPH08308046 A JP H08308046A JP 7109305 A JP7109305 A JP 7109305A JP 10930595 A JP10930595 A JP 10930595A JP H08308046 A JPH08308046 A JP H08308046A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- gas chamber
- differential pressure
- accident
- output signal
- 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.)
- Pending
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Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ガス絶縁開閉装置や
ガス絶縁変圧器の内部事故を、アークの加熱によってガ
ス圧が上昇するのをとらえて報知する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for notifying an internal accident in a gas-insulated switchgear or a gas-insulated transformer by detecting an increase in gas pressure due to heating of an arc.
【０００２】[0002]
【従来の技術】絶縁ガスが封入された密閉容器内に電気
機器を収納したガス絶縁機器は内部が見えないので、事
故が生じたときにどの密閉容器で絶縁破壊が生じたのか
を検知することができない。事故が生じた電気機器を早
急に見付けて修理や除去をしないと、負荷側への電力供
給に支障を来すことになる。そのために、ガス絶縁開閉
装置には、ガス区間毎に、ガス絶縁変圧器には容器毎に
それぞれ内部事故検知装置が設けられている。2. Description of the Related Art Since a gas-insulated device in which an electric device is housed in a hermetically sealed container filled with an insulating gas cannot be seen inside, it is necessary to detect in which hermetically sealed container an insulation breakdown occurs when an accident occurs. I can't. Unless the electric device in which the accident has occurred is immediately found and repaired or removed, power supply to the load side will be hindered. Therefore, the gas insulated switchgear is provided with an internal accident detection device for each gas section and the gas insulated transformer for each container.
【０００３】図６は従来のガス絶縁機器の内部事故検知
装置の構成を示す断面図である。内部事故検知装置１７
は、容器１８が中板３３に気密に固定され、さらに、中
板３３の上部を上蓋１９が気密に、かつ被さるようにし
て構成されている。中板３３には、穴３３Ａ，３３Ｂが
明けられ、穴３３Ａの周縁部にはベローズ２０が、穴３
３Ｂの周縁部にはノズル２３がそれぞれ取り付けられて
いる。ベローズ２０の上端部２２はリミットスイッチ２
１と接触し、リミットスイッチ２１の接点信号１７Ｓが
気密端子４０を介して上蓋１９の上部へ出力される。容
器１８内のガス室１８Ａは配管１６を介して図示されて
ないガス絶縁機器の密閉容器内に連通させる。FIG. 6 is a sectional view showing the structure of a conventional internal accident detection device for gas-insulated equipment. Internal accident detector 17
Is configured such that the container 18 is airtightly fixed to the intermediate plate 33, and the upper lid 19 covers the upper portion of the intermediate plate 33 in an airtight manner. Holes 33A and 33B are formed in the intermediate plate 33, and the bellows 20 is formed on the periphery of the hole 33A.
Nozzles 23 are attached to the peripheral portions of 3B. The upper end 22 of the bellows 20 is the limit switch 2
1 and the contact signal 17S of the limit switch 21 is output to the upper portion of the upper lid 19 via the airtight terminal 40. The gas chamber 18A in the container 18 is communicated via a pipe 16 into a closed container of a gas insulation device (not shown).
【０００４】図６の内部事故検知装置１７は、ＳＰリレ
ー（Sudden Pressure Relay)と呼ばれ、被計測容器内の
ガス圧が急上昇したことを検知して信号を出力するもの
であり一般に市販されている。図６の装置の動作原理を
次に説明する。被計測容器内のガス圧は、温度が高くな
ると上昇するので、ガス流２８が発生する。これに伴
い、ノズル２３内を通るガス流２５も生ずる。それによ
って、上蓋１９内のガス室１９Ａと容器１８内のガス室
１８Ａとの圧力が等しくなるので、ベローズ２０にはそ
の上端部２２を矢印２７方向に押し上げる力は発生しな
い。しかし、ガス室１８Ａの圧力が急上昇すると、ノズ
ル２３でガス流２５がしぼられているのでガス室１９Ａ
の圧力は急には上昇しない。そのために、ガス室１８Ａ
とガス室１９Ａとで差圧が生じ、ベローズ２０にその上
端部２２を矢印２７方向に押し上げる力が発生する。そ
れに伴い、リミットスイッチ２１の接点が働き、被計測
容器内の圧力が急上昇したことを示す報知信号１７Ｓが
出力される。The internal accident detection device 17 of FIG. 6 is called an SP relay (Sudden Pressure Relay), which detects a sudden increase in the gas pressure in the container to be measured and outputs a signal, which is generally commercially available. There is. The operating principle of the device of FIG. 6 will be described below. The gas pressure in the measured container rises as the temperature rises, so that the gas flow 28 is generated. Along with this, a gas flow 25 passing through the nozzle 23 is also generated. As a result, the pressure in the gas chamber 19A inside the upper lid 19 and the pressure in the gas chamber 18A inside the container 18 become equal, so that no force is generated in the bellows 20 to push the upper end portion 22 thereof in the direction of arrow 27. However, when the pressure in the gas chamber 18A rapidly rises, the gas flow 25 is squeezed by the nozzle 23.
Pressure does not rise suddenly. Therefore, the gas chamber 18A
A differential pressure is generated between the gas chamber 19A and the gas chamber 19A, and a force for pushing up the upper end portion 22 of the bellows 20 in the direction of arrow 27 is generated. Along with this, the contact of the limit switch 21 operates, and the notification signal 17S indicating that the pressure inside the measured container has suddenly increased is output.
【０００５】ガス絶縁機器の密閉容器を被計測容器にし
た場合、温度変化による圧力上昇は、一般に緩慢なので
図６のリミットスイッチ２１は作動しない。内部短絡や
地絡事故にともなうアークが発生した場合は、圧力が急
に上昇するのでリミットスイッチ２１が作動する。これ
によって、報知信号１７Ｓが出力されるので、図６の装
置が内部事故を検知することができる。When the closed container of the gas-insulated equipment is used as the container to be measured, the pressure rise due to temperature change is generally slow, so the limit switch 21 of FIG. 6 does not operate. When an arc is generated due to an internal short circuit or a ground fault, the pressure suddenly rises and the limit switch 21 operates. As a result, the notification signal 17S is output, so that the device in FIG. 6 can detect an internal accident.
【０００６】図７は、図６の装置が取り付けられたガス
絶縁開閉装置（ＧＩＳ）の構成を示す側面図である。Ｇ
ＩＳの密閉容器１５に連通する配管１６を介して内部事
故検知装置１７が設けられている。図８は、図６の装置
が取り付けられたガス絶縁変圧器の構成を示す側面図で
ある。ガス絶縁変圧器の密閉容器２９に連通する配管１
６を介して内部事故検知装置１７が取り付けられてい
る。FIG. 7 is a side view showing the structure of a gas insulated switchgear (GIS) to which the device of FIG. 6 is attached. G
An internal accident detection device 17 is provided via a pipe 16 that communicates with the closed container 15 of the IS. FIG. 8 is a side view showing the configuration of a gas insulated transformer to which the device of FIG. 6 is attached. Piping 1 communicating with the closed container 29 of the gas insulated transformer
An internal accident detection device 17 is attached via 6.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、前述し
たような従来の装置は、内部事故時に生じた密閉容器内
の圧力上昇値を知ることができないという問題があっ
た。すなわち、内部事故が発生したときに従来の装置
は、ある設定された圧力上昇値になったときに報知信号
が出力されるだけなので、事故時に密閉容器内の圧力が
実際に何気圧まで上昇したのかを知ることができない。
圧力上昇値を知ることができれば事故の大きさも把握す
ることができ、事故要因の解明や事故対策に役立つ。However, the conventional device as described above has a problem that it is not possible to know the value of the pressure increase in the hermetically sealed container caused by an internal accident. In other words, when an internal accident occurs, the conventional device only outputs a notification signal when it reaches a certain set pressure increase value, so the pressure inside the sealed container actually rose to what atmospheric pressure at the time of the accident. I can't find out.
If the pressure rise value can be known, the magnitude of the accident can be grasped, which is useful for elucidating the cause of the accident and countermeasures for the accident.
【０００８】この発明の目的は、内部事故検知時に圧力
上昇値が判るようにすることにある。An object of the present invention is to make it possible to know the pressure rise value when an internal accident is detected.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、この発明によれば、絶縁ガスが封入された密閉容器
内に電気機器を収納したガス絶縁機器の内部事故を密閉
容器内の圧力変化によって検知するものにおいて、密閉
容器内に連通する第一ガス室と、この第一ガス室に仕切
り弁を介して連通する第二ガス室と、第一ガス室と第二
ガス室との圧力差を電気信号に変換して出力する差圧セ
ンサと、この差圧センサの出力信号レベルが立ち上がっ
たときに密閉容器内部で事故が生じたものと判断して報
知信号を出力する信号処理部と、差圧センサの出力信号
レベルに基づいて前記圧力差を表示する表示部とにより
構成され、仕切り弁は、ガス絶縁機器が正常なときに一
旦開放され、第一ガス室と第二ガス室の差圧を無くした
後に閉じられてなるものとするとよい。In order to achieve the above object, according to the present invention, an internal accident of a gas-insulated device in which an electric device is housed in a hermetically sealed container in which an insulating gas is sealed is prevented from being caused by a pressure in the hermetically sealed container. In what is detected by a change, the first gas chamber communicating with the closed container, the second gas chamber communicating with the first gas chamber through a sluice valve, and the pressure between the first gas chamber and the second gas chamber A differential pressure sensor that converts the difference into an electric signal and outputs the signal, and a signal processing unit that determines that an accident has occurred inside the closed container when the output signal level of the differential pressure sensor rises and outputs a notification signal. , A display unit that displays the pressure difference based on the output signal level of the differential pressure sensor, and the sluice valve is once opened when the gas insulation device is normal, and the sluice valve of the first gas chamber and the second gas chamber is opened. Be closed after eliminating the differential pressure It may be the thing.
【００１０】また、絶縁ガスが封入された密閉容器内に
電気機器を収納したガス絶縁機器の内部事故を密閉容器
内の圧力変化によって検知するものにおいて、密閉容器
内に連通する第一ガス室と、この第一ガス室に仕切り弁
を介して連通する第二ガス室と、第一ガス室と第二ガス
室との圧力差を電気信号に変換して出力する差圧センサ
と、この差圧センサの出力信号レベルが立ち上がったと
きに密閉容器内部で事故が生じたものと判断して報知信
号を出力する信号処理部と、密閉容器内のガス温度を検
出して出力信号を出力する温度センサと、この温度セン
サの出力信号および差圧センサの出力信号から密閉容器
内のガス圧上昇値を予め設定された基準温度に換算して
出力する演算部と、この演算部の出力信号レベルにもと
づいて前記基準温度に換算されたガス圧上昇値を表示す
る表示部とにより構成され、仕切り弁は、ガス絶縁機器
が正常なときに一旦開放され、第一ガス室と第二ガス室
の差圧を無くした後閉じられてなるものとするとよい。Further, in a case of detecting an internal accident of a gas insulation device in which an electric device is housed in an airtight container in which an insulating gas is sealed, by a pressure change in the airtight container, a first gas chamber communicating with the airtight container , A second gas chamber communicating with the first gas chamber via a sluice valve, a differential pressure sensor for converting the pressure difference between the first gas chamber and the second gas chamber into an electric signal and outputting the electric signal, and the differential pressure When the output signal level of the sensor rises, a signal processing unit that determines that an accident has occurred inside the closed container and outputs a notification signal, and a temperature sensor that detects the gas temperature in the closed container and outputs an output signal Based on the output signal level of the temperature sensor and the output signal of the differential pressure sensor, the gas pressure rise value in the sealed container is converted into a preset reference temperature and output from the output signal of the temperature sensor and the output signal level of this operation unit. The reference temperature And a display unit that displays the gas pressure rise value converted to, and the sluice valve is once opened when the gas insulation device is normal, and after eliminating the differential pressure between the first gas chamber and the second gas chamber. It should be closed.
【００１１】[0011]
【作用】この発明の構成によれば、密閉容器内に連通す
る第一ガス室と、この第一ガス室に仕切り弁を介して連
通する第二ガス室と、第一ガス室と第二ガス室の圧力差
を電気信号に変換して出力する差圧センサとを設ける。
仕切り弁をガス絶縁機器が正常なときに一旦開放し、第
一ガス室と第二ガス室の差圧を無くした後に閉じるよう
にしておくと、密閉容器内部の事故時は第一ガス室の圧
力だけが上昇するので、差圧センサの出力信号が立ち上
がる。信号処理部は、差圧センサの出力信号レベルが立
ち上がったときに密閉容器内部で事故が生じたものと判
断して報知信号を出力するので、内部事故を検知するこ
とができる。さらに、表示部が差圧センサの出力信号レ
ベルにもとづいて第一ガス室と第二ガス室の圧力差を表
示するので、圧力上昇値が分かり事故の大きさを知るこ
とができる。According to the structure of the present invention, the first gas chamber communicating with the inside of the closed container, the second gas chamber communicating with the first gas chamber through the partition valve, the first gas chamber and the second gas chamber. And a differential pressure sensor for converting the pressure difference in the chamber into an electric signal and outputting the electric signal.
If the gate valve is opened once the gas insulation device is operating normally and then closed after eliminating the differential pressure between the first gas chamber and the second gas chamber, in the event of an accident inside the closed container, Since only the pressure rises, the output signal of the differential pressure sensor rises. Since the signal processing unit determines that an accident has occurred inside the closed container when the output signal level of the differential pressure sensor rises and outputs a notification signal, it is possible to detect an internal accident. Further, since the display unit displays the pressure difference between the first gas chamber and the second gas chamber based on the output signal level of the differential pressure sensor, the pressure rise value can be known and the magnitude of the accident can be known.
【００１２】また、かかる構成において、密閉容器内の
ガス温度を検出して信号を出力する温度センサと、この
温度センサの出力信号および差圧センサの出力信号から
密閉容器内のガス圧上昇値を予め設定された基準温度に
換算して出力する演算部とを設け、表示部が差圧センサ
の出力信号レベルの代わりに、演算部の出力信号レベル
にもとづいてガス圧上昇値を表示するようにする。これ
により、密閉容器の内部事故を検知するとともに、予め
設定された基準温度に換算された圧力上昇値も知ること
ができ、封入ガス圧力から何気圧上昇したのかを正確に
かつ瞬時に知ることができる。Further, in such a structure, a temperature sensor for detecting a gas temperature in the closed container and outputting a signal, and a gas pressure rise value in the closed container from the output signal of the temperature sensor and the output signal of the differential pressure sensor. Provided with a calculation unit for converting and outputting to a preset reference temperature, the display unit displays the gas pressure increase value based on the output signal level of the calculation unit instead of the output signal level of the differential pressure sensor. To do. As a result, it is possible to detect an internal accident in the closed container and also to know the pressure rise value converted to the preset reference temperature, and to know exactly and instantaneously how much the pressure rises from the enclosed gas pressure. it can.
【００１３】[0013]
【実施例】以下、この発明を実施例に基づいて説明す
る。図１は，この発明の実施例にかかるガス絶縁機器の
内部事故検知装置の構成を示す側面図である。内部事故
検出装置３０は、ＧＩＳの密閉容器１５内に連通する第
一ガス室１と、この第一ガス室１に仕切り弁３を介して
連通する第二ガス室２とが差圧センサ４に接続されてい
る。差圧センサ４は、第一ガス室１と第二ガス室２の圧
力差を電気的な出力信号４Ｓに変換して出力する。信号
処理部５が差圧センサ４の出力信号４Ｓのレベルが立ち
上がったときに密閉容器１５内部で事故が生じたものと
判断して報知信号５Ｓを出力する。また、表示部６は、
差圧センサ４の出力信号４Ｓのレベルにもとづいて第一
ガス室１と第二ガス室２の圧力差を表示する。EXAMPLES The present invention will be described below based on examples. FIG. 1 is a side view showing the configuration of an internal accident detection device for a gas insulated device according to an embodiment of the present invention. In the internal accident detection device 30, the differential pressure sensor 4 includes a first gas chamber 1 communicating with the inside of the GIS closed container 15 and a second gas chamber 2 communicating with the first gas chamber 1 via a sluice valve 3. It is connected. The differential pressure sensor 4 converts the pressure difference between the first gas chamber 1 and the second gas chamber 2 into an electrical output signal 4S and outputs it. When the level of the output signal 4S of the differential pressure sensor 4 rises, the signal processing unit 5 determines that an accident has occurred inside the closed container 15 and outputs the notification signal 5S. Further, the display unit 6 is
The pressure difference between the first gas chamber 1 and the second gas chamber 2 is displayed based on the level of the output signal 4S of the differential pressure sensor 4.
【００１４】図２は、図１の差圧センサ４の内部構成を
示す断面図である。容器８内に隔壁１０で分離された二
つの圧力室６、７が設けられ、圧力室６は、第一ガス室
１に連通し、圧力室７は第二ガス室２に連通している。
隔壁１０には、ひずみゲージ９が貼り付けられ、ひずみ
ゲージ９からの出力信号４Ｓが気密端子１１を介して容
器８の外部へ出力されている。圧力室６と７との間に差
圧が発生すると、隔壁１０が圧力の低い方へたわむの
で、ひずみゲージ９が検知し、差圧に比例する出力信号
４Ｓが出力されるようになっている。なお、気密端子１
１には、ひずみゲージ９から出力信号４Ｓを得るための
給電線も貫通しているが図示は省略されている。FIG. 2 is a sectional view showing the internal structure of the differential pressure sensor 4 of FIG. Two pressure chambers 6 and 7 separated by a partition wall 10 are provided in the container 8, the pressure chamber 6 communicates with the first gas chamber 1, and the pressure chamber 7 communicates with the second gas chamber 2.
A strain gauge 9 is attached to the partition wall 10, and an output signal 4S from the strain gauge 9 is output to the outside of the container 8 via the airtight terminal 11. When a pressure difference is generated between the pressure chambers 6 and 7, the partition wall 10 bends toward the lower pressure side, so the strain gauge 9 detects it and outputs an output signal 4S proportional to the pressure difference. . Airtight terminal 1
1, a power supply line for obtaining the output signal 4S from the strain gauge 9 also penetrates, but is not shown.
【００１５】図１に戻り、ＧＩＳが正常なときに仕切り
弁３が一旦開放される。その場合は、第一ガス室１と第
二ガス室２との間には差圧が生じないので、出力信号４
Ｓのレベルは零である。この状態で仕切り弁３を閉じ
る。内部事故が発生し、密閉容器１５のガス圧が上昇す
ると、第一ガス室１のガス圧が上昇するが、第二ガス室
２の圧力はそのままである。したがって、差圧センサ４
が出力信号４Ｓを出力し、信号処理部５が報知信号５Ｓ
を出力するとともに表示部６が差圧のレベルを表示す
る。第一ガス室１のガスと第二ガス室のガスとで温度差
が生ずると、差圧センサ４が差圧を検知するので、仕切
り弁３は、ＧＩＳが正常なときにときどき開閉し、温度
差によって差圧が生じないようにしておく。図１の装置
により、内部事故を検知することができるとともに、そ
の事故時における密閉容器１５内の圧力上昇値も知るこ
とができる。この圧力上昇値の大小によって、事故の大
きさを知ることができる。Returning to FIG. 1, when the GIS is normal, the gate valve 3 is once opened. In that case, since no differential pressure is generated between the first gas chamber 1 and the second gas chamber 2, the output signal 4
The level of S is zero. In this state, the sluice valve 3 is closed. When an internal accident occurs and the gas pressure in the closed container 15 rises, the gas pressure in the first gas chamber 1 rises, but the pressure in the second gas chamber 2 remains unchanged. Therefore, the differential pressure sensor 4
Outputs the output signal 4S, and the signal processing unit 5 outputs the notification signal 5S.
And the display unit 6 displays the level of the differential pressure. When a temperature difference occurs between the gas in the first gas chamber 1 and the gas in the second gas chamber, the differential pressure sensor 4 detects the differential pressure, so the sluice valve 3 sometimes opens and closes when the GIS is normal, Make sure that no differential pressure is created by the difference. With the device of FIG. 1, an internal accident can be detected, and the pressure rise value in the closed container 15 at the time of the accident can be known. The magnitude of the accident can be known from the magnitude of this pressure rise value.
【００１６】図３は、この発明のさらに異なる実施例に
かかるガス絶縁機器の内部事故検知装置の構成を示す側
面図である。内部事故検知装置３１が密閉容器１５のガ
ス温度を計測して出力する温度センサ１２を備えてい
る。さらに、演算部１３が、この温度センサ１２の出力
信号１２Ｓと差圧センサ４の出力信号４Ｓとの双方を受
け、予め設定された基準温度、例えば２０℃における差
圧に変換して出力信号１３Ｓを出力するようになってい
る。表示部１４は、出力信号１３Ｓを受け差圧センサ４
の差圧を前記基準温度に変換した値を表示する。その他
は、図３の構成と同じである。FIG. 3 is a side view showing the structure of an internal accident detection device for gas-insulated equipment according to a further different embodiment of the present invention. The internal accident detection device 31 includes the temperature sensor 12 that measures and outputs the gas temperature of the closed container 15. Further, the calculation unit 13 receives both the output signal 12S of the temperature sensor 12 and the output signal 4S of the differential pressure sensor 4, converts it into a differential pressure at a preset reference temperature, for example, 20 ° C., and outputs the output signal 13S. Is output. The display unit 14 receives the output signal 13S and receives the differential pressure sensor 4
A value obtained by converting the differential pressure of 1 to the reference temperature is displayed. Others are the same as the configuration of FIG.
【００１７】図３の装置によって、内部事故を検知する
ことができるとともに、予め設定された基準温度に換算
された圧力上昇値を正確に、かつ瞬時に知ることができ
る。ガス絶縁機器の圧力を監視する場合、ガス圧は温度
の関数なので、差圧を予め設定された基準温度に換算す
ることによって封入ガス圧からの正確な圧力上昇値を把
握することができる。任意の温度におけるガス圧を基準
温度２０℃のガス圧に換算する場合には、例えば、気体
の状態方程式として、The apparatus shown in FIG. 3 can detect an internal accident and can accurately and instantaneously know the pressure increase value converted to a preset reference temperature. When the pressure of the gas insulation device is monitored, since the gas pressure is a function of temperature, it is possible to obtain an accurate pressure increase value from the enclosed gas pressure by converting the differential pressure into a preset reference temperature. When converting the gas pressure at an arbitrary temperature into the gas pressure at the reference temperature of 20 ° C., for example, as a gas state equation,
【００１８】[0018]
【数１】 Ｐ＝（Ｐ0 ＋1.03）)(273.15＋Ｔ）／293.15−1.03 を用いる。ここで、Ｐは温度Ｔ（℃）のときの圧力（ｋ
ｇ／ｍ2 ）、Ｐ0 は温度２０℃のときの圧力（ｋｇ／ｍ
2 ）である。演算部１３が数１式の計算を瞬時に計算し
て差圧を出力する。## EQU1 ## P = (P 0 +1.03)) (273.15 + T) /293.15-1.03 is used. Here, P is the pressure (k
g / m 2 ), P 0 is the pressure (kg / m 2 ) at a temperature of 20 ° C.
2 ). The calculation unit 13 instantly calculates the equation 1 and outputs the differential pressure.
【００１９】図４は、この発明のさらに異なる実施例に
かかるガス絶縁機器の内部事故検知装置の構成を示す側
面図である。密閉容器２９がガス絶縁変圧器である他
は、図１の構成と同じである。内部事故検知装置３０に
よって、ガス絶縁変圧器の内部事故検出およびガス圧上
昇値の把握が可能になる。図５は、この発明のさらに異
なる実施例にかかるガス絶縁機器の内部事故検知装置の
構成を示す側面図である。密閉容器２９がガス絶縁変圧
器である他は、図３の構成と同じである。内部事故検知
装置３１によってガス絶縁変圧器の内部事故検出および
予め設定された基準温度に換算されたガス圧上昇値の把
握が可能になる。FIG. 4 is a side view showing the configuration of an internal accident detection device for gas-insulated equipment according to a further different embodiment of the present invention. The configuration is the same as that of FIG. 1 except that the closed container 29 is a gas insulated transformer. The internal accident detection device 30 makes it possible to detect an internal accident of the gas insulation transformer and grasp the gas pressure rise value. FIG. 5 is a side view showing the configuration of an internal accident detection device for gas-insulated equipment according to a further different embodiment of the present invention. The configuration is the same as that of FIG. 3 except that the closed container 29 is a gas insulated transformer. The internal accident detection device 31 makes it possible to detect an internal accident in the gas insulation transformer and grasp the gas pressure rise value converted into a preset reference temperature.
【００２０】[0020]
【発明の効果】この発明は前述のように、差圧センサを
備えることによって内部事故時の圧力上昇値が判り、事
故の大きさが知れるとともに、事故要因の解明や事故対
策に役立つようになる。また、差圧センサと温度センサ
とを備えることにより、内部事故時の圧力上昇値を予め
設定された基準温度に換算することができ、ガス封入時
の圧力に対して内部事故時における正確な圧力上昇値が
判るようになる。As described above, according to the present invention, by providing the differential pressure sensor, the pressure rise value at the time of an internal accident can be known, the magnitude of the accident can be known, and it is also useful for clarifying the cause of the accident and countermeasures for the accident. . Further, by providing a differential pressure sensor and a temperature sensor, the pressure rise value at the time of an internal accident can be converted to a preset reference temperature, and the accurate pressure at the time of the internal accident can be compared with the pressure at the time of gas filling. You will be able to see the rising value.
【図１】この発明の実施例にかかるガス絶縁機器の内部
事故検知装置の構成を示す側面図FIG. 1 is a side view showing the configuration of an internal accident detection device for gas-insulated equipment according to an embodiment of the present invention.
【図２】図１の差圧センサの内部構成を示す断面図FIG. 2 is a sectional view showing an internal configuration of the differential pressure sensor of FIG.
【図３】この発明の異なる実施例にかかるガス絶縁機器
の内部事故検知装置の構成を示す側面図FIG. 3 is a side view showing the configuration of an internal accident detection device for gas-insulated equipment according to a different embodiment of the present invention.
【図４】この発明のさらに異なる実施例にかかるガス絶
縁機器の内部事故検知装置の構成を示す側面図FIG. 4 is a side view showing the configuration of an internal accident detection device for gas-insulated equipment according to yet another embodiment of the present invention.
【図５】この発明のさらに異なる実施例にかかるガス絶
縁機器の内部事故検知装置の構成を示す側面図FIG. 5 is a side view showing the configuration of an internal accident detection device for gas-insulated equipment according to a further different embodiment of the present invention.
【図６】従来の内部事故検知装置の構成を示す断面図FIG. 6 is a sectional view showing the configuration of a conventional internal accident detection device.
【図７】図６の装置が取り付けられたガス絶縁開閉装置
の構成を示す側面図7 is a side view showing the configuration of a gas-insulated switchgear to which the device of FIG. 6 is attached.
【図８】図６の装置が取り付けられたガス絶縁変圧器の
構成を示す側面図8 is a side view showing the configuration of a gas-insulated transformer to which the device of FIG. 6 is attached.
３０，３１：内部事故検知装置、１５、２９：密閉容
器、１：第一ガス室、２：第二ガス室、３：仕切り弁、
４：差圧センサ、５：信号処理部、６，１４：表示部、
１３：演算部30, 31: Internal accident detection device, 15, 29: Airtight container, 1: First gas chamber, 2: Second gas chamber, 3: Gate valve,
4: differential pressure sensor, 5: signal processing unit, 6, 14: display unit,
13: arithmetic unit
Claims (2)
器を収納したガス絶縁機器の内部事故を密閉容器内の圧
力変化によって検知するものにおいて、密閉容器内に連
通する第一ガス室と、この第一ガス室に仕切り弁を介し
て連通する第二ガス室と、第一ガス室と第二ガス室との
圧力差を電気信号に変換して出力する差圧センサと、こ
の差圧センサの出力信号レベルが立ち上がったときに密
閉容器内部で事故が生じたものと判断して報知信号を出
力する信号処理部と、差圧センサの出力信号レベルにも
とづいて前記圧力差を表示する表示部とにより構成さ
れ、仕切り弁は、ガス絶縁機器が正常なときに一旦開放
され、第一ガス室と第二ガス室の差圧を無くした後に閉
じられてなることを特徴とするガス絶縁機器の内部事故
検知装置。Claim: What is claimed is: 1. In a gas insulated device in which an electric device is housed in an airtight container filled with an insulating gas for detecting an internal accident by a pressure change in the airtight container, a first gas chamber communicating with the airtight container. , A second gas chamber communicating with the first gas chamber via a sluice valve, a differential pressure sensor for converting the pressure difference between the first gas chamber and the second gas chamber into an electric signal and outputting the electric signal, and the differential pressure When the output signal level of the sensor rises, it judges that an accident has occurred inside the closed container and outputs a notification signal, and a display that displays the pressure difference based on the output signal level of the differential pressure sensor. A gas insulation device, which is configured to be opened once when the gas insulation device is normal, and closed after eliminating the differential pressure between the first gas chamber and the second gas chamber. Internal accident detection device.
器を収納したガス絶縁機器の内部事故を密閉容器内の圧
力変化によって検知するものにおいて、密閉容器内に連
通する第一ガス室と、この第一ガス室に仕切り弁を介し
て連通する第二ガス室と、第一ガス室と第二ガス室との
圧力差を電気信号に変換して出力する差圧センサと、こ
の差圧センサの出力信号レベルが立ち上がったときに密
閉容器内部で事故が生じたものと判断して報知信号を出
力する信号処理部と、密閉容器内のガス温度を検出して
出力信号を出力する温度センサと、この温度センサの出
力信号および差圧センサの出力信号から密閉容器内のガ
ス圧上昇値を予め設定された基準温度に換算して出力す
る演算部と、この演算部の出力信号レベルにもとづいて
前記基準温度に換算されたガス圧上昇値を表示する表示
部とにより構成され、仕切り弁は、ガス絶縁機器が正常
なときに一旦開放され、第一ガス室と第二ガス室の差圧
を無くした後閉じられてなることを特徴とするガス絶縁
機器の内部事故検知装置。2. A first gas chamber communicating with a hermetically sealed container, which detects an internal accident of a gas insulated device in which an electric device is housed in a hermetically sealed container in which an insulating gas is sealed, by a pressure change in the hermetically sealed container. , A second gas chamber communicating with the first gas chamber via a sluice valve, a differential pressure sensor for converting the pressure difference between the first gas chamber and the second gas chamber into an electric signal and outputting the electric signal, and the differential pressure When the output signal level of the sensor rises, a signal processing unit that determines that an accident has occurred inside the closed container and outputs a notification signal, and a temperature sensor that detects the gas temperature in the closed container and outputs an output signal Based on the output signal level of the temperature sensor and the output signal of the differential pressure sensor, the gas pressure rise value in the sealed container is converted into a preset reference temperature and output from the output signal of the temperature sensor and the output signal level of this operation unit. Replace with the reference temperature The sluice valve is opened once when the gas insulation device is normal, and is closed after eliminating the differential pressure between the first gas chamber and the second gas chamber. An internal accident detection device for gas-insulated equipment, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7109305A JPH08308046A (en) | 1995-05-08 | 1995-05-08 | Internal accident sensor for gas insulated apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7109305A JPH08308046A (en) | 1995-05-08 | 1995-05-08 | Internal accident sensor for gas insulated apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08308046A true JPH08308046A (en) | 1996-11-22 |
Family
ID=14506834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7109305A Pending JPH08308046A (en) | 1995-05-08 | 1995-05-08 | Internal accident sensor for gas insulated apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08308046A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020029819A (en) * | 2000-10-14 | 2002-04-20 | 한국동서발전(주) | fault diagnosis apparatus of a transformer using a gas sensor |
| JP2009520328A (en) * | 2005-12-16 | 2009-05-21 | トーマス アンド ベッツ インターナショナル インク | Method and apparatus for detecting high pressure state of vacuum type electrical device |
| JP2012225831A (en) * | 2011-04-21 | 2012-11-15 | Yamato Scale Co Ltd | Sealing structure and gas filling system for combination weigher |
-
1995
- 1995-05-08 JP JP7109305A patent/JPH08308046A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020029819A (en) * | 2000-10-14 | 2002-04-20 | 한국동서발전(주) | fault diagnosis apparatus of a transformer using a gas sensor |
| JP2009520328A (en) * | 2005-12-16 | 2009-05-21 | トーマス アンド ベッツ インターナショナル インク | Method and apparatus for detecting high pressure state of vacuum type electrical device |
| JP2012225831A (en) * | 2011-04-21 | 2012-11-15 | Yamato Scale Co Ltd | Sealing structure and gas filling system for combination weigher |
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