JP2766574B2 - Oil inlet abnormality monitoring device - Google Patents
Oil inlet abnormality monitoring deviceInfo
- Publication number
- JP2766574B2 JP2766574B2 JP4000947A JP94792A JP2766574B2 JP 2766574 B2 JP2766574 B2 JP 2766574B2 JP 4000947 A JP4000947 A JP 4000947A JP 94792 A JP94792 A JP 94792A JP 2766574 B2 JP2766574 B2 JP 2766574B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- change
- level
- oil temperature
- temperature
- 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 - Lifetime
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- Housings And Mounting Of Transformers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、油入変圧器などの油
入機器の油漏れを早期に検出し、絶縁破壊などの重大事
故を未然に防止する油入電器の異常監視装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-monitoring abnormality monitoring apparatus for detecting an oil leak of an oil-filled device such as an oil-filled transformer at an early stage and preventing a serious accident such as insulation breakdown. is there.
【０００２】[0002]
【従来の技術】近年、変電所の無人化が進められてお
り、このことに伴い変電所における主要機器である変圧
器においても、従来の人による監視から自動監視が採用
されている。この自動監視の一項目として、油入変圧器
の油漏れを監視する以下に説明するような異常監視装置
が考えられている。この異常監視装置は、変圧器の代表
的な油温度を検出し、この温度に基づいて油の膨張収縮
を考慮した演算式で油面位置を求め、同時に測定した油
面位置と比較することで、油漏れを検出するものであ
る。2. Description of the Related Art In recent years, unmanned substations have been promoted, and as a result, automatic monitoring instead of conventional human monitoring has been adopted for transformers, which are the main equipment in substations. As one item of the automatic monitoring, an abnormality monitoring device for monitoring an oil leak of an oil-filled transformer as described below has been considered. This abnormality monitoring device detects the typical oil temperature of the transformer, calculates the oil level based on this temperature, taking into account the expansion and contraction of the oil, and compares it with the measured oil level at the same time. , To detect oil leaks.
【０００３】従来の油入変圧器の異常監視装置の構成を
図７を参照しながら説明する。図７は、例えば特公昭６
０−１６７３６号公報に示された従来の油入変圧器の異
常監視装置を油入変圧器とともに示すブロック図であ
る。A configuration of a conventional oil-immersed transformer abnormality monitoring device will be described with reference to FIG. FIG. 7 shows, for example,
It is a block diagram which shows the abnormality monitoring apparatus of the conventional oil-filled transformer shown by 0-16736 gazette with an oil-filled transformer.
【０００４】図７において、１は油入変圧器、２は油配
管、３は油ポンプ、４は放熱器であり、油入変圧器１内
の発熱を冷却媒体である絶縁油（以下、「油」とい
う。）を油配管２を介して油ポンプ３により循環し、冷
却ファン５によって高温の油に低温の空気を強制的に吹
き付けて放熱する。７はコンサベーターであり、油配管
６を介して油入変圧器１に接続され、油入変圧器１内部
の油の膨張収縮を吸収する。８はコンサベーター７内の
油面位置Ｌを検出する油面検出器、９は油入変圧器１内
の代表的な油温度を検出する油温検出器である。In FIG. 7, 1 is an oil-immersed transformer, 2 is an oil pipe, 3 is an oil pump, 4 is a radiator, and heat generated in the oil-immersed transformer 1 is insulated oil (hereinafter referred to as "cooling medium"). The oil is circulated through an oil pipe 2 by an oil pump 3 and a cooling fan 5 forcibly blows low-temperature air onto high-temperature oil to radiate heat. Reference numeral 7 denotes a conservator, which is connected to the oil-immersed transformer 1 via the oil pipe 6 and absorbs expansion and contraction of oil inside the oil-immersed transformer 1. Reference numeral 8 denotes an oil level detector that detects an oil level position L in the conservator 7, and 9 denotes an oil temperature detector that detects a typical oil temperature in the oil-immersed transformer 1.
【０００５】また、油面検出器８の出力は、油面信号変
換器１１で電気信号に変換され判断部１４に送られる。
油温検出器９の出力は、油温信号変換器１２で電気信号
に変換され演算部１３に送られる。判断部１４は、２つ
の入力信号の差と設定値とを比較し、異常（すなわち、
油漏れ）と判定した場合は、警報出力部１５により警報
を出す。なお、１０は油入変圧器１の異常監視装置であ
る。The output of the oil level detector 8 is converted into an electric signal by an oil level signal converter 11 and sent to a determination unit 14.
The output of the oil temperature detector 9 is converted into an electric signal by the oil temperature signal converter 12 and sent to the calculation unit 13. The determination unit 14 compares the difference between the two input signals with the set value,
If it is determined that the oil leak has occurred, an alarm is issued by the alarm output unit 15. Reference numeral 10 is an abnormality monitoring device for the oil-immersed transformer 1.
【０００６】つぎに、前述した従来の油入変圧器の異常
監視装置の動作を図８を参照しながら説明する。図８
は、コンサベーター７の油面位置と油温度との関係を示
す特性図である。図８において、縦軸は油面位置Ｈ
（％）、横軸は油温度θ（℃）をそれぞれ示す。Next, the operation of the above-mentioned conventional abnormality monitoring apparatus for an oil-filled transformer will be described with reference to FIG. FIG.
FIG. 4 is a characteristic diagram showing a relationship between an oil surface position of the conservator 7 and an oil temperature. In FIG. 8, the vertical axis represents the oil surface position H.
(%), And the horizontal axis indicates the oil temperature θ (° C.).
【０００７】油入変圧器１は、負荷に応じて発熱量が変
化し、それにつれて内部の油の温度も変化する。この温
度の変化に伴い、油の体積が膨張収縮するために、油入
変圧器１の油面が変化する。すなわち、油の温度変化に
よりコンサベーター７内の油面位置Ｌが変動する。In the oil-immersed transformer 1, the amount of heat generated changes according to the load, and the temperature of the oil inside changes accordingly. With the change in the temperature, the oil volume expands and contracts, so that the oil level of the oil-immersed transformer 1 changes. That is, the oil surface position L in the conservator 7 changes due to a change in oil temperature.
【０００８】この関係は、図８の曲線ｆに示すように、
油入変圧器１の形状や油量などから変圧器固有の特性と
なる。もし、油漏れを生じた場合、図８の曲線ｇより下
の領域Ａの実測油面位置となることから油漏れと判断で
きる。[0008] This relationship is represented by a curve f in FIG.
The characteristics of the oil-immersed transformer 1 are inherent to the transformer based on the shape and the amount of oil. If an oil leak occurs, it is determined that the oil is leaking because the measured oil level is in the area A below the curve g in FIG.
【０００９】具体的に、図２を参照しながら油面位置、
油温度の経時的実測例を併せて説明する。油の温度を油
温検出器９により検出し（図２に示す曲線ａ）、この油
温信号を油温信号変換器１２を介して演算部１３に取り
込み、この演算部１３において基準油温度に対する油の
膨張収縮を演算し、さらにこの演算結果をもとにコンサ
ベーター７の正常時の油面位置（図２に示す曲線ｃ）を
演算により推定して判断部１４に出力する。More specifically, referring to FIG.
An example of actual measurement of the oil temperature over time will also be described. The oil temperature is detected by an oil temperature detector 9 (curve a shown in FIG. 2), and this oil temperature signal is taken into an arithmetic unit 13 via an oil temperature signal converter 12, and this arithmetic unit 13 calculates the oil temperature relative to the reference oil temperature. The expansion / contraction of the oil is calculated, and based on the calculation result, the oil level position of the conservator 7 at normal time (curve c shown in FIG. 2) is estimated by calculation and output to the determination unit 14.
【００１０】判断部１４では、油漏れと判断する正常油
面位置と実測油面位置との許容差ΔＨ0が予め設定され
ており、この設定値と演算部１３からの出力信号である
推定油面位置及び油面検出器８で検出した油面信号変換
器１１を介して送られてきた実測油面位置Ｌ（図２に示
す曲線ｂ）の差とを比較し、この差が上記設定値を外れ
た場合、異常（油漏れ）発生と判断して警報出力部１５
から警報を出力する。[0010] The judgment unit 14 sets in advance a tolerance ΔH 0 between the normal oil level and the actually measured oil level at which the oil leak is judged, and the set value and the estimated oil level which is the output signal from the arithmetic unit 13. The difference between the oil level and the measured oil level L (curve b shown in FIG. 2) sent via the oil level signal converter 11 detected by the oil level detector 8 is compared, and the difference is determined by the set value. Is out of the range, it is determined that an abnormality (oil leakage) has occurred and the alarm output unit 15
Outputs an alarm.
【００１１】[0011]
【発明が解決しようとする課題】上述したような従来の
油入電器の異常監視装置では、一般的に検出器には長期
信頼性や耐環境性等を考慮して、油面位置検出にはコン
サベーター７に取り付けたフロート式のダイヤル油面計
の油面位置に比例するフロートアームの回転角をポテン
ショメータの回転角の変化に変換する方式、すなわち可
変抵抗器の抵抗変化に変える方式を使用している。ま
た、油温度検出には油温度に比例した測温抵抗体の抵抗
変化を使用している。これらの検出器よりの対フルスケ
ール測定精度は、各々１〜２％程度であり、総合的な精
度はコンサベーター油面の５％程度である。そこで、こ
の異常監視装置を数百ＭＶＡ級の大容量変圧器に適用し
た場合、変圧器のコンサベーターの油量が１Ｋリットル
程度あることから、油漏れと判定した場合、既に数十〜
数百リットルも漏れていることになり、検出遅れの可能
性が高いという問題点があった。In the conventional oil inlet abnormality monitoring apparatus as described above, the detector is generally used for detecting the oil level in consideration of long-term reliability and environmental resistance. A method of converting the rotation angle of the float arm, which is proportional to the oil level position of the float type dial oil level gauge attached to the conservator 7, into a change in the rotation angle of the potentiometer, that is, a method of changing the resistance change of the variable resistor, is used. ing. The oil temperature detection uses the resistance change of the resistance temperature detector in proportion to the oil temperature. The accuracy of the full-scale measurement from these detectors is about 1 to 2%, respectively, and the overall accuracy is about 5% of the conservator oil level. Therefore, when this abnormality monitoring device is applied to a large-capacity transformer of several hundred MVA class, the amount of oil in the transformer of the transformer is about 1K liter.
A few hundred liters of leakage has occurred, and there has been a problem that the possibility of detection delay is high.
【００１２】この発明は、前述した問題点を解決するた
めになされたもので、従来の油面及び油温検出器により
油漏れを精度よく検出し、より早期に異常を発見するこ
とができる油入電器の異常監視装置を得ることを目的と
する。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. An oil that can accurately detect an oil leak with a conventional oil level and oil temperature detector and can detect abnormality earlier. An object of the present invention is to obtain an abnormality monitoring device for an input device.
【００１３】[0013]
【課題を解決するための手段】この発明の請求項１に係
る油入電器の異常監視装置は、油入電器に付設されてい
るコンサベーターの油面位置を検出する油面検出器に接
続された油面信号変換器と、前記油入電器本体の油温度
を検出する油温検出器に接続された油温信号変換器と、
前記各検出器の出力信号を前記各信号変換器を介して一
定周期でサンプリングし数点の短時間周期の検出値の平
均化処理を行い、所定の一定時間に対する油温変化と油
面位置変化を求め、前記油温変化に対する前記油面位置
変化比である油面変化率を計算し、この油面変化率が予
め設定された異常判定基準値よりも小さい場合には油漏
れ発生と判定する演算処理部と、前記演算処理部によっ
て油漏れ発生と判定された場合には警報を出力する警報
出力部とを備えたものである。 According to a first aspect of the present invention, there is provided an abnormality monitoring device for an oil inlet, which is attached to the oil inlet.
Connected to the oil level detector that detects the oil level of the conservator
Connected oil level signal converter and oil temperature of the oil inlet body
An oil temperature signal converter connected to an oil temperature detector for detecting
The output signal of each of the detectors is combined through the signal converters.
Sampling at a fixed period
Perform oil leveling and oil temperature change and oil
Determining a change in surface position and determining the oil surface position with respect to the oil temperature change
Calculate the oil level change rate, which is the change ratio, and estimate this oil level change rate.
If it is smaller than the set abnormality judgment reference value,
An arithmetic processing unit that determines that the
Alarm that outputs an alarm when it is determined that an oil leak has occurred
And an output unit.
【００１４】この発明の請求項２に係る油入電器の異常
監視装置は、油入電器に付設されているコンサベーター
の油面位置を検出する油面検出器に接続された油面信号
変換器と、前記油入電器本体の油温度を検出する油温検
出器に接続された油温信号変換器と、前記各検出器の出
力信号を前記各信号変換器を介して一定周期でサンプリ
ングし数点の短時間周期の検出値の平均化処理を行い、
所定の一定時間に対する油温変化と油面位置から換算さ
れた油量変化を求め、前記油温変化に対する前記油量変
化比である油量変化率を計算し、この油量変化率が予め
設定された異常判定基準値よりも小さい場合には油漏れ
発生と判定する演算処理部と、前記演算処理部によって
油漏れ発生と判定された場合には警報を出力する警報出
力部とを備えたものである。 According to a second aspect of the present invention, there is provided an abnormality monitoring apparatus for an oil inlet, wherein the conservator is attached to the oil inlet.
Oil level signal connected to the oil level detector that detects the oil level
A converter and an oil temperature detector for detecting an oil temperature of the oil inlet main body.
The oil temperature signal converter connected to the output unit and the output of each of the detectors
The power signal is sampled at a constant cycle through each of the signal converters.
Averaging process of the detected values of several short time periods,
Converted from the oil temperature change and the oil level for a predetermined period of time
The change in the oil amount is determined, and the change in the oil amount with respect to the oil temperature change is calculated.
Calculate the change rate of the oil amount, which is the conversion ratio, and
Oil leakage if smaller than the set abnormality judgment reference value
An arithmetic processing unit that determines that occurrence has occurred,
If it is determined that an oil leak has occurred, an alarm
And a power unit.
【００１５】この発明の請求項３に係る油入電器の異常
監視装置は、油入電器に付設されているコンサベーター
の油面位置を検出する油面検出器に接続された油面信号
変換器と、前記油入電器本体の油温度を検出する油温検
出器に接続された油温信号変換器と、前記コンサベータ
ーの油温度に対する正常時油面位置許容範囲データを記
憶する記憶部と、前記各検出器の出力信号を前記各信号
変換器を介して一定周期でサンプリングし数点の短時間
周期の検出値の平均化処理を行い、所定の一定時間に対
する油温変化と油面位置変化を求め、前記油温変化に対
する前記油面位置変化比である油面変化率を計算し、こ
の油面変化率が予め設定された異常判定基準値よりも小
さい場合には油漏れ発生と判定するとともに、前記油温
変化が所定の微小変動範囲である場合には前記検出され
た油面位置が前記油面位置許容範囲外のときに油漏れ発
生と判定する演算処理部と、前記演算処理部によって油
漏れ発生と判定された場合には警報を出力する警報出力
部とを備えたものである。 According to a third aspect of the present invention, there is provided a device for monitoring abnormality of an oil inlet device, comprising a conservator attached to the oil inlet device.
Oil level signal connected to the oil level detector that detects the oil level
A converter and an oil temperature detector for detecting an oil temperature of the oil inlet main body.
An oil temperature signal converter connected to the output device, and the conservator
Record the allowable oil level position range data for normal oil temperature.
A storage unit for storing the output signals of the detectors
Sampling at a fixed cycle via a converter
Performs averaging of the cycle detection values, and
The change in oil temperature and the change in oil surface position,
Calculate the oil level change rate, which is the oil level position change ratio,
Oil level change rate is smaller than a preset abnormality judgment reference value.
In this case, determine that an oil leak has occurred and
When the change is within a predetermined minute fluctuation range, the detection is performed.
Oil leak occurs when the oil level is out of the allowable range
An arithmetic processing unit that determines that the oil is raw;
Alarm output that outputs an alarm if it is determined that leakage has occurred
And a part.
【００１６】この発明の請求項４に係る油入電器の異常
監視装置は、油入電器に付設されているコンサベーター
の油面位置を検出する油面検出器に接続された油面信号
変換器と、前記油入電器本体の油温度を検出する油温検
出器に接続された油温信号変換器と、前記コンサベータ
ーの油温度に対する正常時油面位置許容範囲データを記
憶する記憶部と、前記各検出器の出力信号を前記各信号
変換器を介して一定周期でサンプリングし数点の短時間
周期の検出値の平均化処理を行い、所定の一定時間に対
する油温変化と油面位置から換算された油量変化を求
め、前記油温変化に対する前記油量変化比である油量変
化率を計算し、この油量変化率が予め設定された異常判
定基準値よりも小さい場合には油漏れ発生と判定すると
ともに、前記油温変化が所定の微小変動範囲である場合
には前記検出された油面位置が前記油面位置許容範囲外
のときに油漏れ発生と判定する演算処理部と、前記演算
処理部によって油漏れ発生と判定された場合には警報を
出力する警報出力部とを備えたものである。 According to a fourth aspect of the present invention, there is provided a device for monitoring abnormality of an oil inlet device, comprising a conservator attached to the oil inlet device.
Oil level signal connected to the oil level detector that detects the oil level
A converter and an oil temperature detector for detecting an oil temperature of the oil inlet main body.
An oil temperature signal converter connected to the output device, and the conservator
Record the allowable oil level position range data for normal oil temperature.
A storage unit for storing the output signals of the detectors
Sampling at a fixed cycle via a converter
Performs averaging of the cycle detection values, and
Oil temperature change and oil level change calculated from oil level
The oil amount change ratio, which is the oil amount change ratio with respect to the oil temperature change,
The rate of change of the oil amount is calculated and the
If it is determined that oil leakage has occurred if it is smaller than the standard value
In both cases, when the oil temperature change is within a predetermined minute fluctuation range
The detected oil level is outside the allowable oil level range.
An arithmetic processing unit that determines that an oil leak has occurred at the time of
If the processing unit determines that an oil leak has occurred, an alarm is issued.
And an alarm output unit for outputting.
【００１７】この発明の請求項５に係る油入電器の異常
監視装置は、油入電器に付設されているコンサベーター
の油面位置を検出する油面検出器に接続された油面信号
変換器と、前記油入電器本体の油温度を検出する油温検
出器に接続された油温信号変換器と、前記各検出器の出
力信号を前記各信号変換器を介して一定周期でサンプリ
ングし数点の短時間周期の検出値の平均化処理を行い、
所定の一定時間に対する油温変化と油面位置変化を求
め、前記油温変化に対する前記油面位置変化比である油
面変化率を計算し、この油面変化率が予め設定された異
常判定基準値よりも小さい場合には油漏れ発生と判定す
る演算処理部と、前記演算処理部によって油漏れ発生と
判定された場合には警報を出力する警報出力部と、前記
検出油面位置、前記検出油温度、及び前記演算処理部の
演算結果を表示するとともに、前記異常判定基準値を設
定するための表示・設定パネルと、前記検出油面位置、
前記検出油温度、及び前記演算処理部の演算結果を外部
に出力する伝送インタフェースとを備えたものである。 According to a fifth aspect of the present invention, there is provided a device for monitoring abnormality of an oil inlet device, comprising a conservator attached to the oil inlet device.
Oil level signal connected to the oil level detector that detects the oil level
A converter and an oil temperature detector for detecting an oil temperature of the oil inlet main body.
The oil temperature signal converter connected to the output unit and the output of each of the detectors
The power signal is sampled at a constant cycle through each of the signal converters.
Averaging process of the detected values of several short time periods,
Calculate the oil temperature change and oil level position change for a predetermined time.
Oil that is the ratio of the change in the oil level to the change in the oil temperature.
Calculate the oil surface change rate and calculate the oil surface change rate
If it is smaller than the normal judgment reference value, it is judged that an oil leak has occurred.
Calculation processing unit, and the occurrence of oil leakage by the calculation processing unit
An alarm output unit that outputs an alarm when determined,
The detected oil level, the detected oil temperature, and the
Display the calculation result and set the abnormality judgment reference value.
Display / setting panel for setting, the detected oil level,
The detected oil temperature and the calculation result of the calculation processing unit are externally
And a transmission interface for outputting the data.
【００１８】この発明の請求項６に係る油入電器の異常
監視装置は、油入電器に付設されているコンサベーター
の油面位置を検出する油面検出器に接続された油面信号
変換器と、前記油入電器本体の油温度を検出する油温検
出器に接続された油温信号変換器と、前記各検出器の出
力信号を前記各信号変換器を介して一定周期でサンプリ
ングし数点の短時間周期の検出値の平均化処理を行い、
所定の一定時間に対する油温変化と油面位置から換算さ
れた油量変化を求め、前記油温変化に対する前記油量変
化比である油量変化率を計算し、この油量変化率が予め
設定された異常判定基準値よりも小さい場合には油漏れ
発生と判定する演算処理部と、前記演算処理部によって
油漏れ発生と判定された場合には警報を出力する警報出
力部と、前記検出油面位置、前記検出油温度、及び前記
演算処理部の演算結果を表示するとともに、前記異常判
定基準値を設定するための表示・設定パネルと、前記検
出油面位置、前記検出油温度、及び前記演算処理部の演
算結果を外部に出力する伝送インタフェースとを備えた
ものである。 According to a sixth aspect of the present invention, there is provided a device for monitoring an abnormality of an oil inlet device, comprising a conservator attached to the oil inlet device.
Oil level signal connected to the oil level detector that detects the oil level
A converter and an oil temperature detector for detecting an oil temperature of the oil inlet main body.
The oil temperature signal converter connected to the output unit and the output of each of the detectors
The power signal is sampled at a constant cycle through each of the signal converters.
Averaging process of the detected values of several short time periods,
Converted from the oil temperature change and the oil level for a predetermined period of time
The change in the oil amount is determined, and the change in the oil amount with respect to the oil temperature change is calculated.
Calculate the change rate of the oil amount, which is the conversion ratio, and
Oil leakage if smaller than the set abnormality judgment reference value
An arithmetic processing unit that determines that occurrence has occurred,
If it is determined that an oil leak has occurred, an alarm
Force section, the detected oil level, the detected oil temperature, and
In addition to displaying the calculation result of the calculation processing unit,
A display / setting panel for setting a fixed reference value and the detection
The oil discharge surface position, the detected oil temperature, and the operation of the arithmetic processing unit
And a transmission interface that outputs the calculation result to the outside.
Things.
【００１９】[0019]
【作用】この発明の請求項１に係る油入電器の異常監視
装置においては、油面検出器によって、油入電器に付設
されているコンサベーターの油面位置が検出される。ま
た、油温検出器によって、前記油入電器本体の油温度が
検出される。さらに、演算処理部によって、前記各検出
器の出力信号が前記各信号変換器を介して一定周期でサ
ンプリングされ数点の短時間周期の検出値の平均化処理
を行い、所定の一定時間に対する油温変化と油面位置変
化が求められ、前記油温変化に対する前記油面位置変化
比である油面変化率が計算され、この油面変化率が予め
設定された異常判定基準値よりも小さい場合には油漏れ
発生と判定される。 そして、警報出力部によって、前記
演算処理部によって油漏れ発生と判定された場合には警
報が出力される。 According to the first aspect of the present invention, the oil level monitor detects the oil level of a conservator attached to the oil input device by the oil level detector. Further, an oil temperature of the oil inlet main body is detected by an oil temperature detector. Further, each of the detections is performed by an arithmetic processing unit.
The output signal of the device is sampled at a fixed cycle through each of the signal converters.
Averaging process of the detected values of several short-period cycles sampled
The oil temperature change and oil level position change for a predetermined period of time.
Change in the oil surface position with respect to the oil temperature change
The oil level change rate, which is the ratio, is calculated, and this oil level change rate is calculated in advance.
Oil leakage if smaller than the set abnormality judgment reference value
It is determined to have occurred. And, by the alarm output unit,
If the arithmetic processing unit determines that an oil leak has occurred,
Information is output.
【００２０】この発明の請求項２に係る油入電器の異常
監視装置においては、油面検出器によって、油入電器に
付設されているコンサベーターの油面位置が検出され
る。また、油温検出器によって、前記油入電器本体の油
温度が検出される。さらに、演算処理部によって、前記
各検出器の出力信号が前記各信号変換器を介して一定周
期でサンプリングされ数点の短時間周期の検出値の平均
化処理を行い、所定の一定時間に対する油温変化と油面
位置から換算された油量変化が求められ、前記油温変化
に対する前記油量変化比である油量変化率が計算され、
この油量変化率が予め設定された異常判定基準値よりも
小さい場合には油漏れ発生と判定される。 そして、警報
出力部によって、前記演算処理部によって油漏れ発生と
判定された場合には警報が出力される。 In the oil inlet abnormality monitoring apparatus according to the second aspect of the present invention, the oil level of the conservator attached to the oil inlet is detected by the oil level detector. Further, an oil temperature of the oil inlet main body is detected by an oil temperature detector. Further, by the arithmetic processing unit,
The output signal of each detector is transmitted through the signal converters at a constant frequency.
Of the detected values of several short-period samples sampled in the period
Oil temperature change and oil level for a predetermined period of time
A change in the oil amount converted from the position is obtained, and the change in the oil temperature is calculated.
An oil amount change rate which is the oil amount change ratio with respect to is calculated,
This oil amount change rate is higher than a preset abnormality determination reference value.
If smaller, it is determined that an oil leak has occurred. And alarm
The output unit determines that an oil leak has occurred by the arithmetic processing unit.
If it is determined, an alarm is output.
【００２１】この発明の請求項３に係る油入電器の異常
監視装置においては、油面検出器によって、油入電器に
付設されているコンサベーターの油面位置が検出され、
油温検出器によって、前記油入電器本体の油温度が検出
される。また、記憶部によって、前記コンサベーターの
油温度に対する正常時油面位置許容範囲データが記憶さ
れる。さらに、演算処理部によって、前記各検出器の出
力信号が前記各信号変換器を介して一定周期でサンプリ
ングされ数点の短時間周期の検出値の平均化処理を行
い、所定の一定時間に対する油温変化と油面位置変化が
求められ、前記油温変化に対する前記油面位置変化比で
ある油面変化率が計算され、この油面変化率が予め設定
された異常判定基準値よりも小さい場合には油漏れ発生
と判定されるとともに、前記油温変化が所定の微小変動
範囲である場合には前記検出された油面位置が前記油面
位置許容範囲外のときに油漏れ発生と判定される。そし
て、警報出力部によって、前記演算処理部によって油漏
れ発生と判定された場合には警報が出力される。According to a third aspect of the present invention, the oil level monitor of the oil inlet includes an oil level detector for detecting a position of an oil level of a conservator attached to the oil inlet.
The oil temperature of the oil inlet main body is detected by an oil temperature detector. The storage unit stores normal oil level position allowable range data with respect to the oil temperature of the conservator. Furthermore, the output of each of the detectors is output by the arithmetic processing unit.
A force signal is sampled at a constant cycle through each of the signal converters.
Averages several short-term detection values
The change in oil temperature and the change in oil surface position over a certain period of time
Calculated, and the ratio of the oil level change to the oil temperature change
A certain oil level change rate is calculated, and this oil level change rate is set in advance.
Oil leakage occurs if the value is smaller than the specified abnormality judgment reference value.
And the oil temperature change is a predetermined minute fluctuation.
If it is within the range, the detected oil level position is the oil level.
It is determined that an oil leak has occurred when the position is outside the position allowable range. Then, the oil is leaked by the arithmetic processing unit by the alarm output unit.
If it is determined that an error has occurred , an alarm is output.
【００２２】この発明の請求項４に係る油入電器の異常
監視装置においては、油面検出器によって、油入電器に
付設されているコンサベーターの油面位置が検出され、
油温検出器によって、前記油入電器本体の油温度が検出
される。また、記憶部によって、前記コンサベーターの
油温度に対する正常時油面位置許容範囲データが記憶さ
れる。さらに、演算処理部によって、前記各検出器の出
力信号が前記各信号変換器を介して一定周期でサンプリ
ングされ数点の短時間周期の検出値の平均化処理を行
い、所定の一定時間に対する油温変化と油面位置から換
算された油量変化が求められ、前記油温変化に対する前
記油量変化比である油量変化率が計算され、この油量変
化率が予め設定された異常判定基準値よりも小さい場合
には油漏れ発生と判定されるとともに、前記油温変化が
所定の微小変動範囲である場合には前記検出された油面
位置が前記油面位置許容範囲外のときに油漏れ発生と判
定される。そして、警報出力部によって、前記演算処理
部によって油漏れ発生と判定された場合には警報が出力
される。According to a fourth aspect of the present invention, the oil level monitor of the conservator attached to the oil inlet is detected by the oil level detector.
The oil temperature of the oil inlet main body is detected by an oil temperature detector. The storage unit stores normal oil level position allowable range data with respect to the oil temperature of the conservator. Furthermore, the output of each of the detectors is output by the arithmetic processing unit.
A force signal is sampled at a constant cycle through each of the signal converters.
Averages several short-term detection values
Change from the oil temperature change and oil level for a predetermined period of time.
The calculated oil amount change is determined, and a change in the oil temperature change is calculated.
The oil amount change rate, which is the oil amount change ratio, is calculated, and this oil amount change
When the conversion rate is smaller than the preset abnormality judgment reference value
It is determined that an oil leak has occurred and the oil temperature change is
If it is within a predetermined minute fluctuation range, the detected oil level
When the position is out of the oil surface position allowable range, it is judged that an oil leak has occurred.
Is determined. Then, the arithmetic processing is performed by an alarm output unit.
If it is determined by the section that an oil leak has occurred , an alarm is output.
【００２３】この発明の請求項５に係る油入電器の異常
監視装置においては、油面検出器によって、油入電器に
付設されているコンサベーターの油面位置が検出され、
油温検出器によって、前記油入電器本体の油温度が検出
される。また、記憶部によって、前記コンサベーターの
油温度に対する正常時油面位置許容範囲データが記憶さ
れる。さらに、演算処理部によって、前記各検出器の出
力信号が前記各信号変換器を介して一定周期でサンプリ
ングされ数点の短時間周期の検出値の平均化処理を行
い、所定の一定時間に対する油温変化と油面位置変化が
求められ、前記油温変化に対する前記油面位置変化比で
ある油面変化率が計算され、この油面変化率が予め設定
された異常判定基準値よりも小さい場合には油漏れ発生
と判定される。 さらに、警報出力部によって、前記演算
処理部によって油漏れ発生と判定された場合には警報が
出力される。 そして、表示・設定パネルによって、前記
検出油面位置、前記検出油温度、及び前記演算処理部の
演算結果が表示されるとともに、前記異常判定基準値が
設定される。 また、伝送インタフェースによって、前記
検出油面位置、前記検出油温度、及び前記演算処理部の
演算結果が外部に出力される。 According to a fifth aspect of the present invention, the oil level monitor of the conservator attached to the oil inlet is detected by the oil level detector.
The oil temperature of the oil inlet main body is detected by an oil temperature detector. Further, the storage unit, the normal time the oil level position tolerance to oil temperature in the conservator range data storage is
It is . Furthermore, the output of each of the detectors is output by the arithmetic processing unit.
A force signal is sampled at a constant cycle through each of the signal converters.
Averages several short-term detection values
The change in oil temperature and the change in oil surface position over a certain period of time
Calculated, and the ratio of the oil level change to the oil temperature change
A certain oil level change rate is calculated, and this oil level change rate is set in advance.
Oil leakage occurs if the value is smaller than the specified abnormality judgment reference value.
Is determined. Further, the arithmetic operation is performed by an alarm output unit.
If the processing unit determines that an oil leak has occurred, an alarm is
Is output. And, by the display / setting panel,
The detected oil level, the detected oil temperature, and the
The calculation result is displayed and the abnormality determination reference value is
Is set. In addition, by the transmission interface,
The detected oil level, the detected oil temperature, and the
The operation result is output to the outside.
【００２４】この発明の請求項６に係る油入電器の異常
監視装置においては、油面検出器によって、油入電器に
付設されているコンサベーターの油面位置が検出され、
油温検出器によって、前記油入電器本体の油温度が検出
される。また、記憶部によって、前記コンサベーターの
油温度に対する正常時油面位置許容範囲データが記憶さ
れる。さらに、演算処理部によって、前記各検出器の出
力信号が前記各信号変換器を介して一定周期でサンプリ
ングされ数点の短時間周期の検出値の平均化処理を行
い、所定の一定時間に対する油温変化と油面位置から換
算された油量変化が求められ、前記油温変化に対する前
記油量変化比である油量変化率が計算され、この油量変
化率が予め設定された異常判定基準値よりも小さい場合
には油漏れ発生と判定される。 さらに、警報出力部によ
って、前記演算処理部によって油漏れ発生と判定された
場合には警報が出力される。 そして、表示・設定パネル
によって、前記検出油面位置、前記検出油温度、及び前
記演算処理部の演算結果が表示されるとともに、前記異
常判定基準値が設定される。 また、伝送インタフェース
によって、前記検出油面位置、前記検出油温度、及び前
記演算処理部の演算結果が外部に出力される。 According to a sixth aspect of the present invention, there is provided an abnormality monitoring apparatus for an oil inlet, wherein the oil level detector detects the oil level of a conservator attached to the oil inlet.
The oil temperature of the oil inlet main body is detected by an oil temperature detector. Further, the storage unit, the normal time the oil level position tolerance to oil temperature in the conservator range data storage is
It is. Furthermore, the output of each of the detectors is output by the arithmetic processing unit.
A force signal is sampled at a constant cycle through each of the signal converters.
Averages several short-term detection values
Change from the oil temperature change and oil level for a predetermined period of time.
The calculated oil amount change is determined, and a change in the oil temperature change is calculated.
The oil amount change rate, which is the oil amount change ratio, is calculated, and this oil amount change
When the conversion rate is smaller than the preset abnormality judgment reference value
It is determined that an oil leak has occurred. Furthermore, the alarm output unit
Therefore, the arithmetic processing unit has determined that an oil leak has occurred.
In that case, an alarm is output. And display / setting panel
The detected oil level, the detected oil temperature, and
The calculation result of the calculation processing unit is displayed, and the
The normal judgment reference value is set. Also, transmission interface
The detected oil level, the detected oil temperature, and
The operation result of the operation processing unit is output to the outside.
【００２５】[0025]
【実施例】実施例１．この発明の実施例１の構成を図１
を参照しながら説明する。図１は、この発明の実施例１
を油入変圧器とともに示すブロック図であり、油入変圧
器１〜油温検出器９、油面信号変換器１１、油温信号変
換器１２及び警報出力部１５は上述した従来装置のもの
と同様である。なお、各図中、同一符号は同一又は相当
部分を示す。[Embodiment 1] FIG. 1 shows the configuration of Embodiment 1 of the present invention.
This will be described with reference to FIG. FIG. 1 shows Embodiment 1 of the present invention.
FIG. 2 is a block diagram showing an oil-immersed transformer together with an oil-immersed transformer 1 to an oil temperature detector 9, an oil level signal converter 11, an oil temperature signal converter 12, and an alarm output unit 15 which are the same as those of the above-described conventional device. The same is true. In the drawings, the same reference numerals indicate the same or corresponding parts.
【００２６】図１において、１６は油温検出器９で検出
した油温信号を油温信号変換器１２を介して、また油面
検出器８で検出した油面信号を油面信号変換器１１を介
して一定周期でサンプリングし、演算処理及び異常判定
をする演算処理部である。In FIG. 1, reference numeral 16 denotes an oil temperature signal detected by the oil temperature detector 9 via an oil temperature signal converter 12 and an oil level signal detected by the oil level detector 8 represents an oil level signal. Is a calculation processing unit that performs sampling at regular intervals through the CPU and performs calculation processing and abnormality determination.
【００２７】[0027]
【００２８】つぎに、前述した実施例１の動作を図２及
び図３を参照しながら説明する。図２は油面位置Ｈ、油
温度θの実測例を示す図、図３はこの発明の実施例１に
よる油温度変化に対する油面変化率ΔＨ／Δθを示す図
である。Next, the operation of the first embodiment will be described with reference to FIGS. FIG. 2 is a diagram showing an actual measurement example of the oil surface position H and the oil temperature θ, and FIG. 3 is a diagram showing the oil surface change rate ΔH / Δθ with respect to the oil temperature change according to the first embodiment of the present invention.
【００２９】油入変圧器１本体の油温度を油温検出器９
で検出し、この油温信号を油温信号変換器１２を介して
演算処理部１６に後述する油面信号と共に一定周期で取
り込む。一方、コンサベーター７の油面Ｌも油面検出器
８で検出し、油面信号変換器１１を介して、油温信号と
同様に一定周期で、演算処理部１６に取り込む。The oil temperature of the oil-immersed transformer 1 is measured by an oil temperature detector 9.
The oil temperature signal is taken into the arithmetic processing unit 16 via the oil temperature signal converter 12 together with an oil level signal described later at a constant period. On the other hand, the oil level L of the conservator 7 is also detected by the oil level detector 8, and is taken into the arithmetic processing unit 16 via the oil level signal converter 11 at a constant period in the same manner as the oil temperature signal.
【００３０】演算処理部１６では、測定時のノイズを除
去するために、数点の短時間周期の測定値の平均化処理
等を行い、所定の一定時間Δｔに対する油温変化Δθと
油面位置変化ΔＨを求め、油温変化に対する油面位置変
化比ΔＨ／Δθを計算する。図３には、図２に示す実測
油面−油温度時間変化例に対するΔＨ／Δθの演算処理
結果を示す。その後、演算処理部１６で予め設定されて
いる異常判定基準値（設定許容範囲）δ0と比較し、 ΔＨ／Δθ＜δ0 の場合（図３の時間ｔ１）、油漏れ発生と判定し警報出
力部１５から警報を出力する。The arithmetic processing unit 16 performs averaging of several short-term measured values in order to remove noise at the time of measurement, and calculates the oil temperature change Δθ and oil level position for a predetermined fixed time Δt. The change ΔH is obtained, and the oil surface position change ratio ΔH / Δθ to the oil temperature change is calculated. FIG. 3 shows a calculation result of ΔH / Δθ with respect to the example of the actual oil level-oil temperature time change shown in FIG. Thereafter, the arithmetic processing unit 16 compares the value with a preset abnormality determination reference value (set allowable range) δ 0, and when ΔH / Δθ <δ 0 (time t1 in FIG. 3), determines that an oil leak has occurred and issues an alarm. The output unit 15 outputs an alarm.
【００３１】この油温変化に対する油面位置変化比ΔＨ
／Δθのような現象の変化率による判定は、測定値その
ものを比較するレベル判定に比べて、検出器の局部的な
範囲における相対感度が高いことや、油面位置変化比が
微分値であることから油漏れ発生時に直ぐに漏れ速度に
対応した値となり、しかも油温度変化を基準としている
ため、急峻な油温変化の影響も少なく高感度で油漏れを
早期に検出できる。すなわち、図２及び図３で明らかな
ように、従来の検出法での検出時間ｔ２に対し、実施例
１ではｔ１の時点で検出できる。The oil surface position change ratio ΔH with respect to this oil temperature change
Judgment based on the change rate of a phenomenon such as / Δθ indicates that the relative sensitivity in the local range of the detector is higher and the oil surface position change ratio is a differential value as compared with the level judgment comparing the measured value itself. Therefore, when an oil leak occurs, the oil leak immediately becomes a value corresponding to the leak speed, and since the oil temperature change is used as a reference, the influence of a steep oil temperature change is small and the oil leak can be detected early with high sensitivity. That is, as is clear from FIGS. 2 and 3, the detection can be performed at the time t1 in the first embodiment with respect to the detection time t2 in the conventional detection method.
【００３２】なお、以上の説明では油面位置の変化につ
いて述べたが、油面位置測定値から油量に換算し、油面
位置変化の代わりに油量の変化を用いれば、さらに正確
に油漏れを検出できる。In the above description, the change in the oil level has been described. However, if the oil level is converted from the measured oil level and the change in the oil level is used instead of the change in the oil level, the oil level can be more accurately determined. Leaks can be detected.
【００３３】この発明の実施例１は、前述したように、
油面検出器８及び油温検出器９からの油面信号及び油温
信号を一定周期毎にサンプリングし、油温度変化に対す
る油面変化率あるいは油量変化率を演算する演算処理部
１６を備えている。従って、上述したポテンショメータ
による油面位置検出や測温抵抗体による油温度検出が、
局部的な範囲において、変化値の測定精度が高く、かつ
油面位置あるいは油量が油温度に比例して膨張収縮する
ことから、もし対象機器に油漏れを生じた場合、油温度
の変化に対する油面位置あるいは油量の変化率が大きく
変化し、しかも油漏れ発生と同時に現れることにより、
従来の検出器を用いても、早期に油漏れを高感度で検出
することができるという効果を奏する。The first embodiment of the present invention, as described above,
An arithmetic processing unit 16 that samples the oil level signal and the oil temperature signal from the oil level detector 8 and the oil temperature detector 9 at regular intervals and calculates the oil level change rate or the oil quantity change rate with respect to the oil temperature change. ing. Therefore, the oil level detection by the potentiometer and the oil temperature detection by the resistance temperature detector
In the local range, the measurement accuracy of the change value is high, and the oil level or the oil amount expands and contracts in proportion to the oil temperature. The rate of change of the oil level or oil amount changes greatly, and at the same time as the oil leak occurs,
Even if a conventional detector is used, it is possible to detect an oil leak at an early stage with high sensitivity.
【００３４】すなわち、油入変圧器１本体の油温変化に
対する油面位置あるいは油量変化率で油漏れを検出する
ので、測定値そのものを比較するレベル判定に比べて、
現象の変化を高感度で検出できることにより、油漏れを
早期に検出でき、しかも油温度の急激な変化の影響が少
なく検出の信頼性も高いという効果を奏する。That is, the oil leak is detected by the oil surface position or the oil amount change rate with respect to the oil temperature change of the oil-immersed transformer 1, so that the oil leakage is detected as compared with the level judgment for comparing the measured values themselves.
Since the change in the phenomenon can be detected with high sensitivity, it is possible to detect an oil leak at an early stage, and further, there is an effect that the influence of a rapid change in the oil temperature is small and the detection reliability is high.
【００３５】実施例２．なお、前述した実施例１では油
温度変化に対する油面あるいは油量変化率による異常検
出について説明したが、油温度に対する油面位置特性に
よる監視を併用することで、さらに検出、監視能力を向
上することができる。Embodiment 2 FIG. In the above-described first embodiment, the abnormality detection based on the oil level or the oil amount change rate with respect to the oil temperature change has been described. However, the detection and monitoring ability is further improved by using the monitoring based on the oil surface position characteristic with respect to the oil temperature. be able to.
【００３６】この発明の実施例２の構成を図４を参照し
ながら説明する。図４は、この発明の実施例２を示すブ
ロック図である。なお、各図中、同一符号は同一又は相
当部分を示す。The configuration of the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing Embodiment 2 of the present invention. In the drawings, the same reference numerals indicate the same or corresponding parts.
【００３７】図４において、１７は記憶部であり、予め
計算により求めてある対象機器に応じた図８に示すよう
なコンサベーターの油温度に対する異常判定境界油面特
性曲線ｈ、ｇを記憶している。In FIG. 4, reference numeral 17 denotes a storage unit, which stores abnormality determination boundary oil level characteristic curves h and g with respect to the oil temperature of the conservator as shown in FIG. ing.
【００３８】この発明の実施例２では、演算処理部１６
において、実施例１と同様に周期的に油温度及び油面位
置を取り込み、油温変化が図５に示す微小変動範囲（±
εの範囲）と判断した場合、実測油面及び油温度をもと
に、記憶部１７より予め記憶してある油温度に対する異
常判定境界油面位置特性曲線ｈ、ｇから正常時油面位置
許容範囲を読み出し、前記実測油面位置と比較して、図
８の領域Ａ、Ｂで示す許容範囲外の場合に異常と判断す
る。In the second embodiment of the present invention, the arithmetic processing unit 16
In FIG. 5, the oil temperature and the oil surface position are periodically taken in in the same manner as in the first embodiment, and the change in the oil temperature is in the minute fluctuation range (±
(range of ε), based on the measured oil level and the oil temperature, the abnormality determination boundary oil level position characteristic curve h, g with respect to the oil temperature stored in advance from the storage unit 17 allows the normal oil level position tolerance. The range is read out and compared with the actually measured oil level position, and if it is out of the permissible range indicated by regions A and B in FIG.
【００３９】この油温度に対する異常判定境界油面位置
特性曲線ｈ、ｇからの異常判断機能を付加することによ
り、油温度変化がほどんどない場合における微小漏油も
検出することができ、さらに検出、監視能力を向上する
ことができる。By adding an abnormality judging function based on the oil surface position characteristic curves h and g to the abnormality judging boundary with respect to the oil temperature, it is possible to detect a minute oil leak when the oil temperature does not substantially change. , Monitoring ability can be improved.
【００４０】実施例３．また、前述した実施例１及び２
では外部出力として、異常検出時に警報を出力する警報
出力部１５を備えていたが、異常検出の判定基準の設定
や油面位置・油温度の測定値及び異常の有無等の機器の
状態を表示する表示・設定パネル１８と、外部とのデー
タ伝送を行う伝送インタフェース１９とを設けると、機
器の油漏れ検出に同様な効果があり、さらに容易に判定
値の設定変更や現状の状態を把握できるという効果を奏
する。Embodiment 3 FIG. Further, the first and second embodiments described above.
Provided an alarm output unit 15 that outputs an alarm when an abnormality is detected as an external output. However, the setting of the criterion for abnormality detection and the status of the equipment such as the oil level position, oil temperature measurement value, and the presence or absence of an abnormality are displayed. By providing the display / setting panel 18 and the transmission interface 19 for performing data transmission with the outside, the same effect can be obtained in detecting the oil leak of the device, and the setting change of the judgment value and the current state can be more easily grasped. This has the effect.
【００４１】この発明の実施例３は、前述したように、
油温度や油面位置等の測定結果、さらには演算結果及び
異常判定結果の表示機能や、外部へのデータ伝送機能を
付加したので、現状の状態を設置した現地あるいは遠方
で容易に把握することができる。つまり、遠方の異常表
示盤等に接続すれば、異常検出を遠方で即時に検出でき
る。また、装置の据え付け後、運転状態のまま最適な検
出値（異常判定基準値）に容易に変更することができ
る。The third embodiment of the present invention, as described above,
A function to display the measurement results such as oil temperature and oil surface position, as well as a calculation result and abnormality judgment result, and a function to transmit data to the outside have been added. Can be. That is, if it is connected to a distant abnormality display panel or the like, abnormality detection can be immediately detected in a distant place. In addition, after installation of the apparatus, it can be easily changed to an optimum detection value (abnormality determination reference value) in the operating state.
【００４２】[0042]
【発明の効果】この発明の請求項１に係る油入電器の異
常監視装置は、以上説明したとおり、油入電器に付設さ
れているコンサベーターの油面位置を検出する油面検出
器に接続された油面信号変換器と、前記油入電器本体の
油温度を検出する油温検出器に接続された油温信号変換
器と、前記各検出器の出力信号を前記各信号変換器を介
して一定周期でサンプリングし数点の短時間周期の検出
値の平均化処理を行い、所定の一定時間に対する油温変
化と油面位置変化を求め、前記油温変化に対する前記油
面位置変化比である油面変化率を計算し、この油面変化
率が予め設定された異常判定基準値よりも小さい場合に
は油漏れ発生と判定する演算処理部と、前記演算処理部
によって油漏れ発生と判定された場合には警報を出力す
る警報出力部とを備えたので、従来の油面及び油温度検
出器により油漏れを精度よく検出し、より早期に異常を
発見することができるという効果を奏する。According to the first aspect of the present invention, as described above, the abnormality monitoring device for an oil inlet device is attached to the oil inlet device.
Level detection to detect the level of the conservator oil level
Oil level signal converter connected to the
Oil temperature signal conversion connected to oil temperature detector to detect oil temperature
And an output signal of each of the detectors through each of the signal converters.
Sampling at fixed intervals and detecting several short-time intervals
Performs averaging of the values, and changes the oil temperature for a certain period of time.
Change in oil surface position and the oil temperature change
Calculate the oil level change rate, which is the surface position change ratio, and calculate the oil level change.
When the rate is smaller than the preset abnormality judgment reference value
Is an arithmetic processing unit that determines that an oil leak has occurred, and the arithmetic processing unit
If an oil leak is determined by the
Since the alarm output unit is provided, the conventional oil level and oil temperature detectors can accurately detect oil leaks, and can find an abnormality earlier.
【００４３】この発明の請求項２に係る油入電器の異常
監視装置は、以上説明したとおり、油入電器に付設され
ているコンサベーターの油面位置を検出する油面検出器
に接続された油面信号変換器と、前記油入電器本体の油
温度を検出する油温検出器に接続された油温信号変換器
と、前記各検出器の出力信号を前記各信号変換器を介し
て一定周期でサンプリングし数点の短時間周期の検出値
の平均化処理を行い、所定の一定時間に対する油温変化
と油面位置から換算された油量変化を求め、前記油温変
化に対する前記油量変化比である油量変化率を計算し、
この油量変化率が予め設定された異常判定基準値よりも
小さい場合には油漏れ発生と判定する演算処理部と、前
記演算処理部によって油漏れ発生と判定された場合には
警報を出力する警報出力部とを備えたので、従来の油面
及び油温度検出器により油漏れを精度よく検出し、より
早期に異常を発見することができるという効果を奏す
る。The oil inlet abnormality monitoring device according to claim 2 of the present invention is attached to the oil inlet as described above.
Level detector to detect the level of the conservator oil level
Oil level signal converter connected to the
Oil temperature signal converter connected to oil temperature detector that detects temperature
And the output signals of the respective detectors are passed through the respective signal converters.
Sampled at fixed intervals and detected values of several short-term periods
Oil temperature change for a certain period
And a change in the oil amount calculated from the oil level and the oil temperature change.
Calculate the oil amount change rate, which is the oil amount change ratio with respect to
This oil amount change rate is higher than a preset abnormality determination reference value.
An arithmetic processing unit that determines that an oil leak has occurred when the size is smaller;
If the arithmetic processing unit determines that an oil leak has occurred,
Since an alarm output unit for outputting an alarm is provided, there is an effect that an oil leak can be accurately detected by a conventional oil level and oil temperature detector, and an abnormality can be found earlier.
【００４４】この発明の請求項３に係る油入電器の異常
監視装置は、以上説明したとおり、油入電器に付設され
ているコンサベーターの油面位置を検出する油面検出器
に接続された油面信号変換器と、前記油入電器本体の油
温度を検出する油温検出器に接続された油温信号変換器
と、前記コンサベーターの油温度に対する正常時油面位
置許容範囲データを記憶する記憶部と、前記各検出器の
出力信号を前記各信号変換器を介して一定周期でサンプ
リングし数点の短時間周期の検出値の平均化処理を行
い、所定の一定時間に対する油温変化と油面位置変化を
求め、前記油温変化に対する前記油面位置変化比である
油面変化率を計算し、この油面変化率が予め設定された
異常判定基準値よりも小さい場合には油漏れ発生と判定
するとともに、前記油温変化が所定の微小変動範囲であ
る場合には前記検出された油面位置が前記油面位置許容
範囲外のときに油漏れ発生と判定する演算処理部と、前
記演算処理部によって油漏れ発生と判定された場合には
警報を出力する警報出力部とを備えたので、従来の油面
及び油温度検出器により油漏れを精度よく検出し、より
早期に異常を発見することができるという効果を奏す
る。The oil inlet abnormality monitoring device according to claim 3 of the present invention is attached to the oil inlet as described above.
Level detector to detect the level of the conservator oil level
Oil level signal converter connected to the
Oil temperature signal converter connected to oil temperature detector that detects temperature
And the normal oil level relative to the oil temperature of the conservator
A storage unit for storing placement tolerance data,
The output signal is sampled at a fixed cycle through each of the signal converters.
Performs averaging of the detected values of several short
Change of oil temperature and oil level for a given period of time
Is the ratio of the oil surface position change to the oil temperature change.
Calculate the oil level change rate, this oil level change rate is set in advance
If it is smaller than the abnormality determination reference value, it is determined that an oil leak has occurred.
And the oil temperature change is within a predetermined minute fluctuation range.
If the detected oil level is
An arithmetic processing unit that determines that an oil leak has occurred when out of range;
If the arithmetic processing unit determines that an oil leak has occurred,
Since an alarm output unit for outputting an alarm is provided, there is an effect that an oil leak can be accurately detected by a conventional oil level and oil temperature detector, and an abnormality can be found earlier.
【００４５】この発明の請求項４に係る油入電器の異常
監視装置は、以上説明したとおり、油入電器に付設され
ているコンサベーターの油面位置を検出する油面検出器
に接続された油面信号変換器と、前記油入電器本体の油
温度を検出する油温検出器に接続された油温信号変換器
と、前記コンサベーターの油温度に対する正常時油面位
置許容範囲データを記憶する記憶部と、前記各検出器の
出力信号を前記各信号変換器を介して一定周期でサンプ
リングし数点の短時間周期の検出値の平均化処理を行
い、所定の一定時間に対する油温変化と油面位置から換
算された油量変化を求め、前記油温変化に対する前記油
量変化比である油量変化率を計算し、この油量変化率が
予め設定された異常判定基準値よりも小さい場合には油
漏れ発生と判定するとともに、前記油温変化が所定の微
小変動範囲である場合には前記検出された油面位置が前
記油面位置許容範囲外のときに油漏れ発生と判定する演
算処理部と、前記演算処理部によって油漏れ発生と判定
された場合には警報を出力する警報出力部とを備えたの
で、従来の油面及び油温度検出器により油漏れを精度よ
く検出し、より早期に異常を発見することができるとい
う効果を奏する。The oil inlet abnormality monitoring device according to claim 4 of the present invention is attached to the oil inlet as described above.
Level detector to detect the level of the conservator oil level
Oil level signal converter connected to the
Oil temperature signal converter connected to oil temperature detector that detects temperature
And the normal oil level relative to the oil temperature of the conservator
A storage unit for storing placement tolerance data,
The output signal is sampled at a fixed cycle through each of the signal converters.
Performs averaging of the detected values of several short
Change from the oil temperature change and oil level for a predetermined period of time.
The calculated oil amount change is determined, and the oil temperature change with respect to the oil temperature change is determined.
Calculate the oil change rate, which is the oil change ratio.
If it is smaller than the preset abnormality judgment reference value,
It is determined that a leak has occurred, and the oil temperature change is
If it is within the small fluctuation range, the detected oil level is
When the oil level is out of the allowable range, it is determined that oil leakage has occurred.
An arithmetic processing unit and the arithmetic processing unit determine that an oil leak has occurred.
Since an alarm output unit that outputs an alarm is provided in the event that the oil leak is detected, the conventional oil level and oil temperature detectors can accurately detect oil leaks, and have the effect that abnormalities can be found earlier. .
【００４６】この発明の請求項５に係る油入電器の異常
監視装置は、以上説明したとおり、油入電器に付設され
ているコンサベーターの油面位置を検出する油面検出器
に接続された油面信号変換器と、前記油入電器本体の油
温度を検出する油温検出器に接続された油温信号変換器
と、前記各検出器の出力信号を前記各信号変換器を介し
て一定周期でサンプリングし数点の短時間周期の検出値
の平均化処理を行い、所定の一定時間に対する油温変化
と油面位置変化を求め、前記油温変化に対する前記油面
位置変化比である油面変化率を計算し、この油面変化率
が予め設定された異常判定基準値よりも小さい場合には
油漏れ発生と判定する演算処理部と、前記演算処理部に
よって油漏れ発生と判定された場合には警報を出力する
警報出力部と、前記検出油面位置、前記検出油温度、及
び前記演算処理部の演算結果を表示するとともに、前記
異常判定基準値を設定するための表示・設定パネルと、
前記検出油面位置、前記検出油温度、及び前記演算処理
部の演算結果を外部に出力する伝送インタフェースとを
備えたので、従来の油面及び油温度検出器により油漏れ
を精度よく検出し、より早期に異常を発見することがで
きるという効果を奏する。The oil inlet abnormality monitoring apparatus according to claim 5 of the present invention is attached to the oil inlet as described above.
Level detector to detect the level of the conservator oil level
Oil level signal converter connected to the
Oil temperature signal converter connected to oil temperature detector that detects temperature
And the output signals of the respective detectors are passed through the respective signal converters.
Sampled at fixed intervals and detected values of several short-term periods
Oil temperature change for a certain period
And a change in the oil level, and the oil level with respect to the oil temperature change.
Calculate the oil level change rate, which is the position change ratio, and calculate the oil level change rate.
Is smaller than a preset abnormality determination reference value.
An arithmetic processing unit that determines that an oil leak has occurred;
Therefore, if it is determined that an oil leak has occurred, an alarm is output.
An alarm output unit, the detected oil level, the detected oil temperature,
And the calculation result of the calculation processing unit is displayed.
A display / setting panel for setting an abnormality judgment reference value;
The detected oil level, the detected oil temperature, and the arithmetic processing
Since the transmission interface for outputting the operation result of the unit to the outside is provided, it is possible to detect oil leakage with a conventional oil level and oil temperature detector with high accuracy, and to find an abnormality earlier.
【００４７】この発明の請求項６に係る油入電器の異常
監視装置は、以上説明したとおり、油入電器に付設され
ているコンサベーターの油面位置を検出する油面検出器
に接続された油面信号変換器と、前記油入電器本体の油
温度を検出する油温検出器に接続された油温信号変換器
と、前記各検出器の出力信号を前記各信号変換器を介し
て一定周期でサンプリングし数点の短時間周期の検出値
の平均化処理を行い、所定の一定時間に対する油温変化
と油面位置から換算された油量変化を求め、前記油温変
化に対する前記油量変化比である油量変化率を計算し、
この油量変化率が予め設定された異常判定基準値よりも
小さい場合には油漏れ発生と判定する演算処理部と、前
記演算処理部によって油漏れ発生と判定された場合には
警報を出力する警報出力部と、前記検出油面位置、前記
検出油温度、及び前記演算処理部の演算結果を表示する
とともに、前記異常判定基準値を設定するための表示・
設定パネルと、前記検出油面位置、前記検出油温度、及
び前記演算処理部の演算結果を外部に出力する伝送イン
タフェースとを備えたので、従来の油面及び油温度検出
器により油漏れを精度よく検出し、より早期に異常を発
見することができるという効果を奏する。The oil inlet abnormality monitoring device according to claim 6 of the present invention is attached to the oil inlet as described above.
Level detector to detect the level of the conservator oil level
Oil level signal converter connected to the
Oil temperature signal converter connected to oil temperature detector that detects temperature
And the output signals of the respective detectors are passed through the respective signal converters.
Sampled at fixed intervals and detected values of several short-term periods
Oil temperature change for a certain period
And a change in the oil amount calculated from the oil level and the oil temperature change.
Calculate the oil amount change rate, which is the oil amount change ratio with respect to
This oil amount change rate is higher than a preset abnormality determination reference value.
An arithmetic processing unit that determines that an oil leak has occurred when the size is smaller;
If the arithmetic processing unit determines that an oil leak has occurred,
An alarm output unit that outputs an alarm, the detected oil level position,
Displays the detected oil temperature and the calculation result of the calculation processing unit
In addition, a display for setting the abnormality determination reference value
A setting panel, the detected oil level, the detected oil temperature,
And a transmission input for outputting the operation result of the operation processing unit to the outside.
Since a interface, the oil leakage is detected accurately by the conventional oil level and oil temperature detector, an effect that can be found abnormal at an earlier stage.
【図１】この発明の実施例１を油入変圧器とともに示す
ブロック図である。FIG. 1 is a block diagram showing Embodiment 1 of the present invention together with an oil-filled transformer.
【図２】この発明の実施例１の対象油入変圧器の油面位
置、油温度の実測例を示す図である。FIG. 2 is a diagram illustrating an actual measurement example of an oil level and an oil temperature of a target oil-filled transformer according to the first embodiment of the present invention.
【図３】この発明の実施例１の動作を示す特性図であ
る。FIG. 3 is a characteristic diagram showing an operation of the first embodiment of the present invention.
【図４】この発明の実施例２を示すブロック図である。FIG. 4 is a block diagram showing Embodiment 2 of the present invention.
【図５】この発明の実施例２の動作を示す図である。FIG. 5 is a diagram showing the operation of the second embodiment of the present invention.
【図６】この発明の実施例３を示すブロック図である。FIG. 6 is a block diagram showing a third embodiment of the present invention.
【図７】従来の油入電器の異常監視装置を油入変圧器と
ともに示すブロック図である。FIG. 7 is a block diagram showing a conventional oil-injection device abnormality monitoring device together with an oil-in transformer.
【図８】従来の油入電器の異常監視装置の動作を示す図
である。FIG. 8 is a diagram showing the operation of a conventional oil inlet abnormality monitoring device.
１ 油入変圧器 ７ コンサベーター ８ 油面検出器 ９ 油温検出器 １０Ａ、１０Ｂ、１０Ｃ 異常監視装置 １１ 油面信号変換器 １２ 油温信号変換器 １５ 警報出力部 １６ 演算処理部 １７ 記憶部 １８ 表示・設定パネル １９ 伝送インタフェース REFERENCE SIGNS LIST 1 oil-filled transformer 7 conservator 8 oil level detector 9 oil temperature detector 10A, 10B, 10C abnormality monitoring device 11 oil level signal converter 12 oil temperature signal converter 15 alarm output unit 16 arithmetic processing unit 17 storage unit 18 Display / setting panel 19 Transmission interface
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01F 27/00Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) H01F 27/00
Claims (6)
ーの油面位置を検出する油面検出器に接続された油面信
号変換器と、 前記油入電器本体の油温度を検出する油温検出器に接続
された油温信号変換器と、前記各検出器の出力信号を前記各信号変換器を介して一
定周期でサンプリングし数点の短時間周期の検出値の平
均化処理を行い、所定の一定時間に対する油温変化と油
面位置変化を求め、前記油温変化に対する前記油面位置
変化比である油面変化率を計算し、この油面変化率が予
め設定された異常判定基準値よりも小さい場合には油漏
れ発生と判定する演算処理部と、 前記演算処理部によって油漏れ発生と判定された場合に
は警報を出力する警報出力部と を備えたことを特徴とす
る油入電器の異常監視装置。1. An oil level signal connected to an oil level detector for detecting an oil level of a conservator attached to an oil inlet.
Signal converter and an oil temperature detector that detects the oil temperature of the oil inlet main unit .
The output signal of each of the detected oil temperature signal converters and each of the detectors is transmitted through the respective signal converters.
Sampling at a fixed period
Perform oil leveling and oil temperature change and oil
Determining a change in surface position and determining the oil surface position with respect to the oil temperature change
Calculate the oil level change rate, which is the change ratio, and estimate this oil level change rate.
If it is smaller than the set abnormality judgment reference value,
An arithmetic processing unit that determines that oil leakage has occurred; and
And an alarm output unit for outputting an alarm .
ーの油面位置を検出する油面検出器に接続された油面信
号変換器と、 前記油入電器本体の油温度を検出する油温検出器に接続
された油温信号変換器と、前記各検出器の出力信号を前記各信号変換器を介して一
定周期でサンプリングし数点の短時間周期の検出値の平
均化処理を行い、所定の一定時間に対する油温変化と油
面位置から換算された油量変化を求め、前記油温変化に
対する前記油量変化比である油量変化率を計算し、この
油量変化率が予め設定された異常判定基準値よりも小さ
い場合には油漏れ発生と判定する演算処理部と、 前記演算処理部によって油漏れ発生と判定された場合に
は警報を出力する警報出力部と を備えたことを特徴とす
る油入電器の異常監視装置。2. An oil level signal connected to an oil level detector for detecting an oil level of a conservator attached to an oil inlet.
Signal converter and an oil temperature detector that detects the oil temperature of the oil inlet main unit .
The output signal of each of the detected oil temperature signal converters and each of the detectors is transmitted through the respective signal converters.
Sampling at a fixed period
Perform oil leveling and oil temperature change and oil
A change in the oil amount converted from the surface position is determined, and the change in the oil temperature is calculated.
Calculate the oil amount change rate, which is the oil amount change ratio,
Oil rate of change is smaller than the preset abnormality judgment reference value
If it is determined that an oil leak has occurred, the arithmetic processing unit determines that an oil leak has occurred.
And an alarm output unit for outputting an alarm .
ーの油面位置を検出する油面検出器に接続された油面信
号変換器と、 前記油入電器本体の油温度を検出する油温検出器に接続
された油温信号変換器と、 前記コンサベーターの油温度に対する正常時油面位置許
容範囲データを記憶する記憶部と、前記各検出器の出力信号を前記各信号変換器を介して一
定周期でサンプリングし数点の短時間周期の検出値の平
均化処理を行い、所定の一定時間に対する油温変化と油
面位置変化を求め、前記油温変化に対する前記油面位置
変化比である油面変化率を計算し、この油面変化率が予
め設定された異常判定基準値よりも小さい場合には油漏
れ発生と判定するとともに、前記油温変化が所定の微小
変動範囲である場合には前記検出された油面位置が前記
油面位置許容範囲外のときに油漏れ発生と判定する演算
処理部と、 前記演算処理部によって油漏れ発生と判定 された場合に
は警報を出力する警報出力部とを備えたことを特徴とす
る油入電器の異常監視装置。3. An oil level signal connected to an oil level detector for detecting the oil level of a conservator attached to the oil inlet.
Signal converter and an oil temperature detector that detects the oil temperature of the oil inlet main unit .
Oil temperature signal converter that is, the through a storage unit for storing a normal time oil level position tolerance data to oil temperature conservator, the respective signal converter an output signal of each detector one
Sampling at a fixed period
Perform oil leveling and oil temperature change and oil
Determining a change in surface position and determining the oil surface position with respect to the oil temperature change
Calculate the oil level change rate, which is the change ratio, and estimate this oil level change rate.
If it is smaller than the set abnormality judgment reference value,
Is determined to occur, and the oil temperature change is
In the case of the fluctuation range, the detected oil level position is
Calculation to judge that oil leakage has occurred when the oil level is outside the allowable range
A processing unit, the arithmetic processing unit abnormality monitoring apparatus of the oil incoming call device characterized by comprising an alarm output unit for outputting an alarm when it is determined that oil leakage caused by.
ーの油面位置を検出する油面検出器に接続された油面信
号変換器と、 前記油入電器本体の油温度を検出する油温検出器に接続
された油温信号変換器と、 前記コンサベーターの油温度に対する正常時油面位置許
容範囲データを記憶する記憶部と、前記各検出器の出力信号を前記各信号変換器を介して一
定周期でサンプリングし数点の短時間周期の検出値の平
均化処理を行い、所定の一定時間に対する油温変化と油
面位置から換算された油量変化を求め、前記油温変化に
対する前記油量変化比である油量変化率を計算し、この
油量変化率が予め設定された異常判定基準値よりも小さ
い場合には油漏れ発生と判定するとともに、前記油温変
化が所定の微小変動範囲である場合には前記検出された
油面位置が前記油面位置許容範囲外のときに油漏れ発生
と判定する演算処理部と、 前記演算処理部によって油漏れ発生と判定 された場合に
は警報を出力する警報出力部とを備えたことを特徴とす
る油入電器の異常監視装置。4. An oil level signal connected to an oil level detector for detecting an oil level of a conservator attached to an oil inlet.
Signal converter and an oil temperature detector that detects the oil temperature of the oil inlet main unit .
Oil temperature signal converter that is, the through a storage unit for storing a normal time oil level position tolerance data to oil temperature conservator, the respective signal converter an output signal of each detector one
Sampling at a fixed period
Perform oil leveling and oil temperature change and oil
A change in the oil amount converted from the surface position is determined, and the change in the oil temperature is calculated.
Calculate the oil amount change rate, which is the oil amount change ratio,
Oil rate of change is smaller than the preset abnormality judgment reference value
Oil leakage has occurred and the oil temperature change
If the change is within a predetermined minute fluctuation range, the
Oil leakage occurs when the oil level is out of the allowable range
And the determining operation processing unit, the arithmetic processing unit abnormality monitoring apparatus of the oil incoming call device characterized by comprising an alarm output unit for outputting an alarm when it is determined that oil leakage caused by.
ーの油面位置を検出する油面検出器に接続された油面信
号変換器と、 前記油入電器本体の油温度を検出する油温検出器に接続
された油温信号変換器と、前記各検出器の出力信号を前記各信号変換器を介して一
定周期でサンプリングし数点の短時間周期の検出値の平
均化処理を行い、所定の一定時間に対する油温変化と油
面位置変化を求め、前記油温変化に対する前記油面位置
変化比である油面変化率を計算し、この油面変化率が予
め設定された異常判定基準値よりも小さい場合には油漏
れ発生と判定する演算処理部と、 前記演算処理部によって油漏れ発生と判定された場合に
は警報を出力する警報出力部と、 前記検出油面位置、前記検出油温度、及び前記演算処理
部の演算結果を表示するとともに、前記異常判定基準値
を設定するための表示・設定パネルと、 前記検出油面位置、前記検出油温度、及び前記演算処理
部 の演算結果を外部に出力する伝送インタフェースとを
備えたことを特徴とする油入電器の異常監視装置。5. An oil level signal connected to an oil level detector for detecting the oil level of a conservator attached to the oil inlet.
Signal converter and an oil temperature detector that detects the oil temperature of the oil inlet main unit .
The output signal of each of the detected oil temperature signal converters and each of the detectors is transmitted through the respective signal converters.
Sampling at a fixed period
Perform oil leveling and oil temperature change and oil
Determining a change in surface position and determining the oil surface position with respect to the oil temperature change
Calculate the oil level change rate, which is the change ratio, and estimate this oil level change rate.
If it is smaller than the set abnormality judgment reference value,
An arithmetic processing unit that determines that oil leakage has occurred; and
Is an alarm output unit that outputs an alarm, the detected oil level, the detected oil temperature, and the arithmetic processing.
Display the calculation results of the
Display / setting panel for setting the above, the detected oil level, the detected oil temperature, and the arithmetic processing
Abnormality monitoring apparatus of the oil incoming call device which is characterized in that a transmission interface for outputting the operation result parts outside.
ーの油面位置を検出する油面検出器に接続された油面信
号変換器と、 前記油入電器本体の油温度を検出する油温検出器に接続
された油温信号変換器と、前記各検出器の出力信号を前記各信号変換器を介して一
定周期でサンプリングし数点の短時間周期の検出値の平
均化処理を行い、所定の一定時間に対する油温変化と油
面位置から換算された油量変化を求め、前記油温変化に
対する前記油量変化比である油量変化率を計算し、この
油量変化率が予め設定された異常判定基準値よりも小さ
い場合には油漏れ発生と判定する演算処理部と、 前記演算処理部によって油漏れ発生と判定された場合に
は警報を出力する警報出力部と、 前記検出油面位置、前記検出油温度、及び前記演算処理
部の演算結果を表示するとともに、前記異常判定基準値
を設定するための表示・設定パネルと、 前記検出油面位置、前記検出油温度、及び前記演算処理
部 の演算結果を外部に出力する伝送インタフェースとを
備えたことを特徴とする油入電器の異常監視装置。6. An oil level signal connected to an oil level detector for detecting an oil level of a conservator attached to the oil inlet.
Signal converter and an oil temperature detector that detects the oil temperature of the oil inlet main unit .
The output signal of each of the detected oil temperature signal converters and each of the detectors is transmitted through the respective signal converters.
Sampling at a fixed period
Perform oil leveling and oil temperature change and oil
A change in the oil amount converted from the surface position is determined, and the change in the oil temperature is calculated.
Calculate the oil amount change rate, which is the oil amount change ratio,
Oil rate of change is smaller than the preset abnormality judgment reference value
If it is determined that an oil leak has occurred, the arithmetic processing unit determines that an oil leak has occurred.
Is an alarm output unit that outputs an alarm, the detected oil level, the detected oil temperature, and the arithmetic processing.
Display the calculation results of the
Display / setting panel for setting the above, the detected oil level, the detected oil temperature, and the arithmetic processing
Abnormality monitoring apparatus of the oil incoming call device which is characterized in that a transmission interface for outputting the operation result parts outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4000947A JP2766574B2 (en) | 1992-01-07 | 1992-01-07 | Oil inlet abnormality monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4000947A JP2766574B2 (en) | 1992-01-07 | 1992-01-07 | Oil inlet abnormality monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05182838A JPH05182838A (en) | 1993-07-23 |
| JP2766574B2 true JP2766574B2 (en) | 1998-06-18 |
Family
ID=11487875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4000947A Expired - Lifetime JP2766574B2 (en) | 1992-01-07 | 1992-01-07 | Oil inlet abnormality monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2766574B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2739486B1 (en) * | 1995-09-28 | 1997-11-14 | Magnier Philippe | METHOD AND DEVICE FOR PROTECTION AGAINST EXPLOSION AND FIRE OF ELECTRICAL TRANSFORMERS |
| JPH09306743A (en) * | 1996-05-10 | 1997-11-28 | Mitsubishi Electric Corp | Oil temperature detection device for oil-impregnated electric equipment |
| JP2003015022A (en) * | 2001-06-29 | 2003-01-15 | Canon Inc | Range-finding device, range-finding method and control program |
| JP2014179471A (en) * | 2013-03-15 | 2014-09-25 | Hitachi Ltd | Stationary induction electric device |
| CN103528771B (en) * | 2013-10-11 | 2015-11-18 | 广州供电局有限公司 | A kind of method measuring oil leakage fault of cable terminal porcelain sleeve |
| JP6343635B2 (en) | 2016-06-27 | 2018-06-13 | 本田技研工業株式会社 | Power receiving device, transportation device, and detection method |
| DK3343575T3 (en) * | 2016-12-28 | 2020-06-22 | Abb Schweiz Ag | PRESSURE COMPENSATOR IN AN UNDERWATER INSTALLATION |
| CN118209260B (en) * | 2024-05-21 | 2024-08-27 | 南通世睿电力科技有限公司 | Oil leakage monitoring and early warning system for transformer oil storage cabinet |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5943697Y2 (en) * | 1980-06-24 | 1984-12-26 | 富士電機株式会社 | Oil level gauge for oil-filled appliances |
| JPS59172217A (en) * | 1983-03-18 | 1984-09-28 | Toshiba Corp | Oil leakage detector for oil-immersed electric apparatus |
| JPH0828299B2 (en) * | 1989-02-21 | 1996-03-21 | 株式会社高岳製作所 | Oil leak detector for oil-filled equipment |
-
1992
- 1992-01-07 JP JP4000947A patent/JP2766574B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05182838A (en) | 1993-07-23 |
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