JPH01298917A - Power supply equipment monitoring method and power supply equipment monitoring device - Google Patents

Power supply equipment monitoring method and power supply equipment monitoring device

Info

Publication number
JPH01298917A
JPH01298917A JP63128472A JP12847288A JPH01298917A JP H01298917 A JPH01298917 A JP H01298917A JP 63128472 A JP63128472 A JP 63128472A JP 12847288 A JP12847288 A JP 12847288A JP H01298917 A JPH01298917 A JP H01298917A
Authority
JP
Japan
Prior art keywords
temperature
power supply
supply equipment
equipment monitoring
power
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
Application number
JP63128472A
Other languages
Japanese (ja)
Inventor
Koichi Shiromizu
白水 廣一
Seiji Kotani
小谷 誠治
Mikio Takanaka
高仲 三喜男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujita Corp
Original Assignee
Fujita Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujita Corp filed Critical Fujita Corp
Priority to JP63128472A priority Critical patent/JPH01298917A/en
Publication of JPH01298917A publication Critical patent/JPH01298917A/en
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

PURPOSE:To maintain a power supply facility healthy by calculating a mean current on the basis of temperatures of a cable, a power device, etc., and detecting a malfunction by the comparison with an allowable temperature to output an alarm. CONSTITUTION:A temperature sensor 2 is mounted at a cable 1, and a peripheral temperature sensor 3 is mounted in the vicinity. These signals are input through a thermometer 4 to a microcomputer 5. The microcomputer 5 calculates a mean current by these data, and judges a malfunction on the basis of the comparison with an allowable temperature. Their results are displayed on a CRT 8, recorded in a recorder 7, and output to an alarm unit 8.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電力供給設備監視方法および電力供給設備監視
装置に係り、とくに、ケーブルおよび電力機器の温度を
計測してその温度に基づいて正常・異常の判別をなすも
のに関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power supply equipment monitoring method and a power supply equipment monitoring device, and in particular, measures the temperature of cables and power equipment and determines whether it is normal or not based on the temperature. Concerning what determines abnormality.

〔従来の技術〕[Conventional technology]

一般に電力供給設備にあっては、電力の使用目的によっ
て需要電力の予想を立てる。そしてこの需要電力を用途
別の配線系統に分けて供給している。
Generally, for power supply equipment, the power demand is predicted based on the purpose of use of the power. This power demand is then divided and supplied to wiring systems for different uses.

ところで、需要電力の管理方法としては、たとえば、一
定の場所に監視計器を集めて集中して管理する方法が採
用されており、また、必要な場合には警報装置により警
報を出力して電力供給の保安維持管理をなしている。
By the way, as a method of managing power demand, for example, a method is adopted in which monitoring instruments are gathered in a certain place and managed centrally, and when necessary, an alarm is outputted by an alarm device and power is supplied. In charge of safety maintenance and management.

上記警報装置は、系統別または一括して電力使用時に流
れる電流の強さを計測し、その計測値が系統または総合
して付加された容量を超過した場合に91報を出力して
電力を遮断するものであり、それによって需要電力の保
安管理を行なっている。
The above alarm device measures the strength of the current that flows when electricity is used, either by system or all at once, and if the measured value exceeds the added capacity of the system or overall, it outputs a 91 alarm and shuts off the power. This is how the power demand is managed.

(発明が解決しようとする課題〕 上記従来の構成によるとつぎのような問題があった。(Problem to be solved by the invention) The conventional configuration described above has the following problems.

まずケーブルの許容電流値としてはケーブルの絶縁体の
許容温度を超えないように考慮して決定″されているが
、許容電流以下であっても上記絶縁体の許容温度を超え
る場合があり、そのような場合にはケーブルの健全性を
損なうことになってしまう。
First, the allowable current value of the cable is determined in such a way that it does not exceed the allowable temperature of the cable's insulation, but even if the current is less than the allowable current, it may exceed the allowable temperature of the insulator. In such a case, the integrity of the cable will be compromised.

また、需要電力の監視は系統別に矢金して電流を計測す
ることにより行なっているが、これでは配線経路中の環
境あるいは接続部等の局所的な監視を行なうことができ
ないという問題があった。
Additionally, power demand is monitored by measuring the current for each system, but this method has the problem of not being able to locally monitor the environment or connections within the wiring route. .

本願発明はこのような点に基づいてなされたものでその
目的とするところは、ケーブルおよび電力機器等の健全
性を確実に維持し、かつ配線経路中の瑚境あるいは局部
的な監視を行なうことが可能な電力供給設備監視方法お
よび電力供給設備監視装置を提供することにある。
The present invention was made based on these points, and its purpose is to reliably maintain the integrity of cables, power equipment, etc., and to perform boundary or local monitoring of wiring routes. An object of the present invention is to provide a power supply equipment monitoring method and a power supply equipment monitoring device that enable the following.

(課題を解決するための手段〕 上記目的を達成するべく本願発明の第1請求項による電
力供給設備監視方法は、ケーブルおよび電力機器等の温
度を計測する工程と、計測した温度を基に平均電流値を
算出するとともに許容温度との対比により正常・異常の
判別をなし異常が発生した場合には警報を出力する工程
とを具備したことを特徴とするものである。
(Means for Solving the Problems) In order to achieve the above object, the power supply equipment monitoring method according to the first claim of the present invention includes a step of measuring the temperature of cables, power equipment, etc., and an average value based on the measured temperature. The present invention is characterized by the step of calculating the current value, determining whether it is normal or abnormal by comparing it with the allowable temperature, and outputting an alarm if an abnormality occurs.

つぎに第2請求項による電力供給設備監視方法は、請求
項1記載の電力供給設備監視方法において、ケーブルお
よび電力機器等の表面温度を計測すると同時にそれらの
周辺温度をも計測し、上記表面温度を上記周辺温度に基
づいて補正することを特徴とするものである。
Next, the power supply equipment monitoring method according to the second claim is the power supply equipment monitoring method according to claim 1, in which the surface temperature of the cables, power equipment, etc. is measured and the surrounding temperature thereof is also measured at the same time. is characterized in that it is corrected based on the above-mentioned ambient temperature.

つぎに第3請求項による電力供給設備監視装置は、ケー
ブルおよび電力機器等に取り付けられそれらの温度を計
測する温度計測手段と、上記温度計測手段の信号に基づ
いて平均電流値を算出するとともに許容温度との対比に
より正常・異常の判別をなす演算手段と、この演算手段
の演算結果を表示・記録する表示中記録手段と、上記演
算手段の判別の結果異常が発生した場合に警報を出力す
る警報出力手段とを具備したことを特徴とするものであ
る。
Next, the power supply equipment monitoring device according to the third aspect includes a temperature measuring means attached to a cable and power equipment etc. to measure the temperature thereof, and an average current value calculated based on the signal of the temperature measuring means and an allowable current value. A calculating means for determining normality/abnormality by comparison with temperature, a display/recording means for displaying and recording the calculation results of this calculating means, and outputting an alarm when an abnormality occurs as a result of the determination by the above calculating means. The present invention is characterized by comprising an alarm output means.

さらに第4請求項による電力供給設備監視装置は、請求
項3記載の電力供給設備監視装置において、ケーブルお
よび電力機器等の周辺温度を計測する周辺温度計測手段
を設け、上記演算装置は上記温度計測手段からの信号お
よび上記周辺温度計測手段からの信号に基づいて温度補
正をなすものであることを特徴とするものである。
Furthermore, the power supply equipment monitoring device according to a fourth aspect is the power supply equipment monitoring device according to claim 3, further comprising an ambient temperature measuring means for measuring the ambient temperature of cables, power equipment, etc. The present invention is characterized in that temperature correction is performed based on a signal from the means and a signal from the ambient temperature measuring means.

〔作 用〕[For production]

まず第1請求項による電力供給設備監視方法は、ケーブ
ルおよび電力機器の温度を計測し、この計装置に基づい
て平均電流値を算出し、かつ許容温度との対比により正
常φ異常の判別をなすものである。したがって従来のよ
うに電流値に基づいて監視していた場合のように、電流
値は許容値以下であるのに温度は許容温度を超えている
といった事態の発生を防止することができる。
First, the power supply equipment monitoring method according to the first claim measures the temperature of the cable and the power equipment, calculates the average current value based on this measuring device, and determines whether it is normal or abnormal by comparing it with the allowable temperature. It is something. Therefore, it is possible to prevent a situation in which the temperature exceeds the permissible temperature even though the current value is below the permissible value, which occurs when monitoring is performed based on the current value as in the past.

つぎに第2請求項の場合であるが、これは平均電流値を
算出する基になる温度計測に関するものであり、つまり
ケーブルおよび電力機器の表面温度を計測すると同時に
、それらの周辺温度をも計測するものであり、かかる周
辺温度に基づいて上記表面温度を補正し、より精度の高
い温度計測をなすものである。したがってそれに基づい
て算出される平均電流値もきわめて精度の高いものとな
り、さらには監視そのものの信頼性を大幅に向上させる
ことができる。
Next, in the case of the second claim, this relates to temperature measurement that is the basis for calculating the average current value, that is, it measures the surface temperature of cables and power equipment, and at the same time measures the surrounding temperature. The above-mentioned surface temperature is corrected based on the ambient temperature to achieve more accurate temperature measurement. Therefore, the average current value calculated based on this becomes extremely accurate, and furthermore, the reliability of monitoring itself can be greatly improved.

つぎに第3請求項による電力供給設備監視装置は、まず
温度計測手段によりケーブルの温度を計測する。この計
測値に基づいて演算手段は平均電流値を算出し、かつ許
容温度との対比により正常・異常の判別をなす、その判
別結果は表示・記録手段により表示されかつ記録される
。また、異常が発生した場合には警報出力手段により警
報が出力される。
Next, in the power supply equipment monitoring device according to the third aspect, first, the temperature of the cable is measured by the temperature measuring means. Based on this measured value, the calculation means calculates the average current value, and compares it with the allowable temperature to determine whether it is normal or abnormal.The result of the determination is displayed and recorded by the display/recording means. Further, when an abnormality occurs, an alarm is outputted by the alarm output means.

さらに第4請求項による電力供給設備監視装置は、ケー
ブルの周辺温度を計測する周辺温度計測手段を設置し、
上記温度計測手段により計測された温度を周囲温度に基
づいて補正するものであり、それによって平均電流値を
高い精度で算出し、さらには精度の高い監視を行なうも
のである。
Furthermore, the power supply equipment monitoring device according to the fourth aspect is provided with an ambient temperature measuring means for measuring the ambient temperature of the cable,
The temperature measured by the temperature measuring means is corrected based on the ambient temperature, thereby calculating the average current value with high accuracy, and furthermore, performing highly accurate monitoring.

〔実 施 例〕〔Example〕

以下第1図ないし第3図を参照して本発明の一実施例を
説明する。第1図は本実施例による電力供給設備監視装
置の構成図であり、図中符号(1)はケーブルである。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a block diagram of a power supply equipment monitoring device according to this embodiment, and reference numeral (1) in the figure indicates a cable.

このケーブル(1)には温度センサ(2)が設置されて
いる。また上記ケーブル(1)の近傍には周辺温度を計
測するための周辺温度センサ(3)が設置されている。
A temperature sensor (2) is installed on this cable (1). Further, an ambient temperature sensor (3) for measuring ambient temperature is installed near the cable (1).

これら温度センサ(2)および周辺温度センサ(3)か
らの信号は温度計(4)に入力される。
Signals from these temperature sensors (2) and ambient temperature sensors (3) are input to a thermometer (4).

上記温度計(4)からの信号はマイクロコンピユータ(
5)に入力され、マイクロコンピュータ(5)はそれに
基づいて平均電流値を算出するとともに、許容温度との
対比に基づいて正常・異常の判別をなす、そしてそれら
の結果は、CRT (8)により表示され、かつ記録器
(7)に記録される。
The signal from the above thermometer (4) is sent to the microcomputer (
5), the microcomputer (5) calculates the average current value based on it, and determines whether it is normal or abnormal based on the comparison with the allowable temperature.The results are then transmitted to the CRT (8). displayed and recorded on the recorder (7).

さらに異常が発生した場合には、上記CRT (8)に
その旨の表示がなされるとともに、警報器(8)を介し
て警報が出力される。
Furthermore, if an abnormality occurs, a display to that effect is displayed on the CRT (8) and an alarm is outputted via the alarm (8).

このように本実施例による監視装置は、従来のそれと異
なり、ケーブル(1)の温度を計測して異常の判別をな
すものであり、そこでこの温度と電流値との関係につい
て説明する。一般にケーブル(1)に電流が流れると、
導体抵抗により発熱し、ケーブル(1)の熱容量に見合
った時間差を持ちながら昇温していく、これを第3図を
参照して説明する。第3図は横軸に時間をとり、縦軸に
温度および電流値をとって、その時間変化を示した図で
ある。この第3図から明らかなように、電流値と温度と
の間には時間遅れ(Δt)がある。これは電流の変化に
対してケーブル自身が、流れた電流に応じて発熱(ある
いは冷却)するが、ケーブル自身の導体および絶縁体等
の温度を上げるために熱量が消費されるのでその分だけ
時間遅れが発生するからである。このような温度と電流
との関係を解明することにより両者の関係が明確になり
、温度を計測することにより電流値を算出することが出
来るものである。
As described above, the monitoring device according to this embodiment differs from the conventional one in that it measures the temperature of the cable (1) to determine an abnormality, and the relationship between this temperature and the current value will be explained. Generally, when current flows through cable (1),
Heat is generated by the conductor resistance, and the temperature rises with a time difference commensurate with the heat capacity of the cable (1). This will be explained with reference to FIG. 3. FIG. 3 is a diagram showing time changes with time on the horizontal axis and temperature and current value on the vertical axis. As is clear from FIG. 3, there is a time delay (Δt) between the current value and the temperature. This is because the cable itself generates heat (or cools down) in response to changes in current, but heat is consumed to raise the temperature of the cable's own conductors and insulators, so it takes a corresponding amount of time. This is because delays occur. By elucidating the relationship between temperature and current, the relationship between the two becomes clear, and the current value can be calculated by measuring temperature.

以上の構成を基に第3図を参照してその作用を説明する
。まず温度センサ(2)によりケーブル(1)の表面温
度を計測し、かつ周辺温度センサ(3)によりケーブル
(1)の周辺温度を計測する。
Based on the above configuration, its operation will be explained with reference to FIG. First, the temperature sensor (2) measures the surface temperature of the cable (1), and the ambient temperature sensor (3) measures the ambient temperature of the cable (1).

これら計測による計測値は温度計(0に入力される。そ
してこの温度計(4)からマイクロコンピュータ(5)
に信号が出力される。マイクロコンピュータ(5)は表
面温度を周辺温度に基づいて補正し、その補正値を基に
平均電流値を算出する。
The measured values from these measurements are input to the thermometer (0), and from this thermometer (4) to the microcomputer (5).
A signal is output. The microcomputer (5) corrects the surface temperature based on the ambient temperature, and calculates the average current value based on the corrected value.

また、上記温度とあらかじめ設定された゛許容温度とを
比較して正常−異常の判別をなす、そてその結果はCR
T (13)に表示されるとともに記録器(7)に記録
される。また、判別の結果異常が発生していると判断さ
れた場合には、警報器(8)を介して警報が出力される
In addition, the above temperature is compared with a preset allowable temperature to determine whether it is normal or abnormal, and the result is CR.
T (13) and recorded on the recorder (7). Furthermore, if it is determined that an abnormality has occurred as a result of the determination, an alarm is outputted via the alarm device (8).

以上本実施例によると以下のような効果を奏することが
できる。
According to this embodiment, the following effects can be achieved.

まず、従来のように単に電流を計測して判別しているの
ではなく、ケーブル(1)の温度を計測して判別するよ
うにしているので、ケーブル(1)の健全性を確実に維
持することができ、従来のように電lit Jま許容値
以下であるのに温度は許容値を超えていたという事態は
発生しないものである。
First, the determination is made by measuring the temperature of the cable (1) instead of simply measuring the current as in the past, which ensures the integrity of the cable (1). This eliminates the conventional situation where the temperature exceeds the allowable value even though the electric current is below the allowable value.

また、周辺温度センサ(3)により周辺の温度を計測し
ているので、環境を監視することができるとともに、温
度センサ(2)および周辺温度センサ(3)を適宜な場
所に設置することにより局部的な監視を行なうことがで
きる。
In addition, since the surrounding temperature is measured by the surrounding temperature sensor (3), it is possible to monitor the environment, and by installing the temperature sensor (2) and the surrounding temperature sensor (3) at appropriate locations, it is possible to monitor the surrounding temperature. monitoring can be carried out.

また、本実施例の場合には、温度の計測に際して温度セ
ンサ(2)による計測値を周辺温度センサ(3)による
計測値により補正するようにしているので、精度の高い
監視を行なうことができる。
Furthermore, in the case of this embodiment, when measuring the temperature, the value measured by the temperature sensor (2) is corrected by the value measured by the ambient temperature sensor (3), so that highly accurate monitoring can be performed. .

また、監視結果は表示され、かつ記録されるので、監視
作業が容易であるとともに、記録されたデータに基づい
てさらに信頼性の高い監視を提供することができる。
Further, since the monitoring results are displayed and recorded, monitoring work is facilitated, and more reliable monitoring can be provided based on the recorded data.

〔発明の効果〕〔Effect of the invention〕

以上詳述したように本発明による電力供給設備監視方法
および電力供給設備監視装置によると。
According to the power supply equipment monitoring method and power supply equipment monitoring device according to the present invention as described in detail above.

ケーブルおよび電力機器の健全性を確実に維持して、高
い精度の監視を行なうことができ、設備の安全性および
健全性を維持する上できわめて効果的である。
It is possible to reliably maintain the health of cables and power equipment and perform highly accurate monitoring, which is extremely effective in maintaining the safety and health of equipment.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図ないし第3図は本発明の一実施例を示す図で、第
1図は電力供給設備監視装置の構成図。 第2図は温度Q電流の時間変化を示す特性図、第3図は
作用を説明する図である。 (1)ケーブル (2)温度センサ(温度計測手段) (3)周辺温度センサ  (4)温度計(5)マイクロ
コンピュータ(演算手段)(8)CRT(表示手段) (7)記録器(記録手段) (8)警報器(警報出力手段) 特許出願人  フジタ工業株式会社、−1’  1.”
’シ:I :”’l’l、i”・
1 to 3 are diagrams showing one embodiment of the present invention, and FIG. 1 is a configuration diagram of a power supply equipment monitoring device. FIG. 2 is a characteristic diagram showing the change in temperature Q current over time, and FIG. 3 is a diagram explaining the effect. (1) Cable (2) Temperature sensor (temperature measurement means) (3) Ambient temperature sensor (4) Thermometer (5) Microcomputer (calculation means) (8) CRT (display means) (7) Recorder (recording means) ) (8) Alarm (alarm output means) Patent applicant: Fujita Kogyo Co., Ltd., -1' 1. ”
'S: I: "'l'l, i"・

Claims (1)

【特許請求の範囲】 1、ケーブルおよび電力機器等の温度を計測する工程と
、計測した温度を基に平均電流値を算出するとともに許
容温度との対比により正常・異常の判別をなし異常が発
生した場合には警報を出力する工程とを具備したことを
特徴とする電力供給設備監視方法。 2、請求項1記載の電力供給設備監視方法において、ケ
ーブルおよび電力機器等の表面温度を計測すると同時に
それらの周辺温度をも計測し、上記表面温度を上記周辺
温度に基づいて補正することを特徴とする電力供給設備
監視方法。 3、ケーブルおよび電力機器等に取り付けられそれらの
温度を計測する温度計測手段と、上記温度計測手段の信
号に基づいて平均電流値を算出するとともに許容温度と
の対比により正常・異常の判別をなす演算手段と、この
演算手段の演算結果を表示・記録する表示・記録手段と
、上記演算手段の判別の結果異常が発生した場合に警報
を出力する警報出力手段とを具備したことを特徴とする
電力供給設備監視装置。 4、請求項3記載の電力供給設備監視装置において、ケ
ーブルおよび電力機器の周辺温度を計測する周辺温度計
測手段を設け、上記演算装置は上記温度計測手段からの
信号および上記周辺温度計測手段からの信号に基づいて
温度補正をなすものであることを特徴とする電力供給設
備監視装置。
[Claims] 1. A process of measuring the temperature of cables, power equipment, etc., calculating an average current value based on the measured temperature, and comparing it with an allowable temperature to determine whether it is normal or abnormal, and an abnormality occurs. 1. A method for monitoring power supply equipment, comprising the step of outputting an alarm when a power supply equipment is detected. 2. The power supply equipment monitoring method according to claim 1, characterized in that, at the same time as measuring the surface temperature of cables, power equipment, etc., their surrounding temperatures are also measured, and the surface temperature is corrected based on the surrounding temperature. A method for monitoring power supply equipment. 3. Temperature measuring means attached to cables, power equipment, etc. to measure their temperature, and calculating the average current value based on the signal from the temperature measuring means, and determining whether it is normal or abnormal by comparing it with the allowable temperature. It is characterized by comprising a calculation means, a display/recording means for displaying and recording the calculation result of the calculation means, and an alarm output means for outputting an alarm when an abnormality occurs as a result of the determination by the calculation means. Power supply equipment monitoring device. 4. The power supply equipment monitoring device according to claim 3, further comprising an ambient temperature measuring means for measuring the ambient temperature of the cable and the power equipment, and the arithmetic unit receiving a signal from the temperature measuring means and a signal from the ambient temperature measuring means. A power supply equipment monitoring device characterized in that it performs temperature correction based on a signal.
JP63128472A 1988-05-27 1988-05-27 Power supply equipment monitoring method and power supply equipment monitoring device Pending JPH01298917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63128472A JPH01298917A (en) 1988-05-27 1988-05-27 Power supply equipment monitoring method and power supply equipment monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63128472A JPH01298917A (en) 1988-05-27 1988-05-27 Power supply equipment monitoring method and power supply equipment monitoring device

Publications (1)

Publication Number Publication Date
JPH01298917A true JPH01298917A (en) 1989-12-01

Family

ID=14985575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63128472A Pending JPH01298917A (en) 1988-05-27 1988-05-27 Power supply equipment monitoring method and power supply equipment monitoring device

Country Status (1)

Country Link
JP (1) JPH01298917A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04317511A (en) * 1991-04-16 1992-11-09 Mitsubishi Electric Corp Transmission line overload control device
JP2016197981A (en) * 2015-04-06 2016-11-24 株式会社Nttファシリティーズ Circuit breaker control system, power supply control system, circuit breaker control method, and program
US9787083B2 (en) 2012-12-06 2017-10-10 Twin-Star International, Inc. Overheat-resistant power cord and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS479688U (en) * 1971-03-08 1972-10-05
JPS5325848A (en) * 1976-08-24 1978-03-10 Toshiba Corp Temperature abnormality observation device
JPS5537869A (en) * 1978-09-11 1980-03-17 Tokyo Shibaura Electric Co Method of judging abnormal temperature of electric eouipment
JPS5631323A (en) * 1979-08-22 1981-03-30 Hitachi Ltd Method of detecting malfunction of internal contact for gas insulated device
JPS6191576A (en) * 1984-10-12 1986-05-09 Sumitomo Electric Ind Ltd Method for detecting fault sections of power cables
JPS61128128A (en) * 1984-11-28 1986-06-16 Toshiba Corp Diagnostic apparatus for abnormality of rotating body

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS479688U (en) * 1971-03-08 1972-10-05
JPS5325848A (en) * 1976-08-24 1978-03-10 Toshiba Corp Temperature abnormality observation device
JPS5537869A (en) * 1978-09-11 1980-03-17 Tokyo Shibaura Electric Co Method of judging abnormal temperature of electric eouipment
JPS5631323A (en) * 1979-08-22 1981-03-30 Hitachi Ltd Method of detecting malfunction of internal contact for gas insulated device
JPS6191576A (en) * 1984-10-12 1986-05-09 Sumitomo Electric Ind Ltd Method for detecting fault sections of power cables
JPS61128128A (en) * 1984-11-28 1986-06-16 Toshiba Corp Diagnostic apparatus for abnormality of rotating body

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04317511A (en) * 1991-04-16 1992-11-09 Mitsubishi Electric Corp Transmission line overload control device
US9787083B2 (en) 2012-12-06 2017-10-10 Twin-Star International, Inc. Overheat-resistant power cord and method
JP2016197981A (en) * 2015-04-06 2016-11-24 株式会社Nttファシリティーズ Circuit breaker control system, power supply control system, circuit breaker control method, and program

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