JPS63131426A - Fuse deterioration diagnosis of low pressure power equipment during operation - Google Patents
Fuse deterioration diagnosis of low pressure power equipment during operationInfo
- Publication number
- JPS63131426A JPS63131426A JP27644686A JP27644686A JPS63131426A JP S63131426 A JPS63131426 A JP S63131426A JP 27644686 A JP27644686 A JP 27644686A JP 27644686 A JP27644686 A JP 27644686A JP S63131426 A JPS63131426 A JP S63131426A
- Authority
- JP
- Japan
- Prior art keywords
- fuse
- temperature
- resistance
- deterioration
- resistance value
- 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
Links
- 230000006866 deterioration Effects 0.000 title claims description 20
- 238000003745 diagnosis Methods 0.000 title description 2
- 238000005259 measurement Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 210000000078 claw Anatomy 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- 206010027336 Menstruation delayed Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、低圧動力設備の保護ヒユーズの抵抗値を設備
稼動中に測定して、保護ヒユーズの劣化診断する方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for diagnosing deterioration of a protective fuse of low-pressure power equipment by measuring the resistance value of the protective fuse during operation of the equipment.
（従来の技術）
従来、ヒユーズの劣化状態を検査する方法はなく、ヒユ
ーズが切れれば新品と取替える方法がとられていた。ま
た、ヒユーズの超低抵抗測定法として、電圧降下法があ
るが、稼動中の設備を止めるか休止を利用し、直流電源
装置を使って、一定電 。(Prior Art) Conventionally, there was no method for inspecting the deterioration state of a fuse, and the method used was to replace the fuse with a new one if it broke. In addition, the voltage drop method is a method for measuring ultra-low resistance of fuses, but it is possible to measure a constant current using a DC power supply by shutting down or taking advantage of the suspension of operating equipment.
流を流し、被測定物であるヒユーズの両端に電圧検出棒
を人があてて電圧を測定し、オームの法則から抵抗を計
算する方法である。In this method, a person measures the voltage by applying a voltage detection rod to both ends of the fuse, which is the object to be measured, and then calculates the resistance using Ohm's law.
（発明が解決しようと、する問題点） しかし、従来の測定方法（二は下記に示す欠点がある。(The problem that the invention attempts to solve) However, the conventional measurement method (2) has the following drawbacks.
即ち（１）、設備を休止するか、または停電させて、ヒ
ユーズを装置から取外さなければ測定不可”能であり、
測定（−長時間かかる。（２）、直流電源装置（１０Ａ
〜１００Ａ ）が必要である。（３）、計器の読み取り
あるいは、検出棒の接触に人的誤差が入る。That is, (1) measurement is not possible unless the equipment is stopped or the power is cut off and the fuse is removed from the equipment;
Measurement (-takes a long time. (2), DC power supply (10A)
~100A) is required. (3) Human error occurs in meter reading or contact with the detection rod.
（４）、ヒユーズを取外して測定するため、熱時、冷時
でエレメントの歪現象が異り、抵抗の変化をきたす恐が
ある。(4) Since the fuse is removed for measurement, the distortion phenomenon of the element is different depending on whether it is hot or cold, which may cause a change in resistance.
本発明は、上記欠点を解消するもので、ヒユーズの抵抗
値を稼動中の負荷電流を利用して測り、測定値を自動演
算し初期値と比較することで、その劣化の程度を知る方
法である。つまりヒユーズ寿命を予測する事で、ヒユー
ズの繰返しストレスによる疲労破断を予防し、設備の突
発故障の未然防止を図ることを目的とするものである。The present invention solves the above-mentioned drawbacks by measuring the resistance value of the fuse using the load current during operation, automatically calculating the measured value, and comparing it with the initial value, thereby determining the degree of deterioration. be. In other words, by predicting the lifespan of fuses, the purpose is to prevent fatigue rupture of fuses due to repeated stress and prevent sudden equipment failures.
（問題点を解決するための手段）
本発明の特徴は、低圧動力設備のヒユーズの抵抗値を、
該設備の稼動中の負荷電流とヒユーズ間電圧と、ヒユー
ズ温度を測定して、該測定結果から温度補正した抵抗値
を計算して求め、該抵抗値の該ヒユーズの標準抵抗値と
比べた抵抗増加率を求め、該抵抗増加率を用いてあらか
じめ求めてある抵抗増、加重とヒユーズ寿命との関係テ
ーブルより、ヒユーズの劣化程度を判定する稼動中の低
圧動力設備のヒユーズ劣化診断方法にある。(Means for Solving the Problems) A feature of the present invention is that the resistance value of the fuse of low-pressure power equipment is
Measure the load current, voltage between the fuses, and fuse temperature during operation of the equipment, calculate the temperature-corrected resistance value from the measurement results, and compare the resistance value with the standard resistance value of the fuse. The present invention provides a method for diagnosing fuse deterioration in operating low-pressure power equipment, in which the rate of increase is determined, and the degree of deterioration of the fuse is determined from a relationship table between resistance increase, load, and fuse life, which is determined in advance using the rate of increase in resistance.
（作用）
まず、ヒユーズに繰返しストレスを加えた場合のヒユー
ズ抵抗値の増加と劣化との関係について調べた。(Effect) First, we investigated the relationship between the increase in fuse resistance and deterioration when stress is repeatedly applied to the fuse.
新品のヒユーズ（規格２００Ａ）１：３００Ａの電流を
１０秒間流し、続いて１２．５秒間通電を遮断するサイ
クルを繰返しながら抵抗増加率を測った。The resistance increase rate was measured while repeating a cycle in which a current of 1:300 A was applied to a new fuse (standard 200 A) for 10 seconds, and then the current was cut off for 12.5 seconds.
破断は抵抗増加率６２〜９８チの範囲でおこり、ストレ
スの繰返し回数は５００〜４０００回であった。平均す
ると破断は抵抗増加率ｓｏ％でおこることが判った。Fracture occurred at a resistance increase rate in the range of 62 to 98 inches, and the number of stress repetitions was 500 to 4000 times. It was found that, on average, rupture occurred at a resistance increase rate of so%.
第２図はそのテスト結果の平均値をもとに示したもので
、横軸のヒユーズ寿命はヒユーズが切れたときのストレ
ス繰り返し回数を１００％として表示した。Figure 2 is based on the average value of the test results, and the fuse life on the horizontal axis is expressed with the number of stress repetitions when the fuse blows as 100%.
さらに、テスト中のヒユーズの組織を拡大して゛観察し
たところ、抵抗増加率４０％以上では大きな亀裂が５〜
１ｏ本発生しており、劣化が進み危険な状態で取り替え
が必要であった。Furthermore, when we enlarged and observed the structure of the fuse during the test, we found that when the resistance increase rate was 40% or more, large cracks were observed.
There were 1 o of them, and they had deteriorated and were in a dangerous condition and needed to be replaced.
また、増加率が１０〜４０％未満の場合は小さな亀裂が
５〜１０本、大きな亀裂が１〜２本あり、劣化が進行し
つつあり錯視する必要あることが、また、増加率が１６
チ未満の場合は、小さな亀裂の発生もなく、劣化は認め
られなかった。In addition, if the increase rate is less than 10% to 40%, there are 5 to 10 small cracks and 1 to 2 large cracks, indicating that deterioration is progressing and it is necessary to create an optical illusion.
When the temperature was less than 1, no small cracks were generated and no deterioration was observed.
このことから第１表に示すように、抵抗増加率が１０％
未満の場合ヒユーズは良好、１０％以上４０％未満では
要注意、４０％以上の場合は不良と判断出来ることが判
った。From this, as shown in Table 1, the resistance increase rate is 10%.
It was found that if it is less than 10%, the fuse is good, if it is 10% or more and less than 40%, caution is required, and if it is 40% or more, it is judged to be defective.
又要注意と判断されたヒユーズに対してはさら（１２０
〜４０％未満と１０〜２０％未満（１分は錯視の強化を
することが望ましい。Further, for fuses judged to require attention (120
- Less than 40% and 10 to less than 20% (it is desirable to strengthen the illusion for 1 minute).
第１表
本発明は上述の知見に基づいて、ヒユーズの異常の有無
を判断し劣化診断するものである。Table 1 Based on the above-mentioned knowledge, the present invention determines whether or not there is an abnormality in a fuse and diagnoses its deterioration.
次にヒユーズの抵抗値の測定方法について第３図。Next, Fig. 3 shows how to measure the resistance value of a fuse.
第４図で説明する。This will be explained with reference to FIG.
設備稼動中の負荷電流を利用して、ヒユーズ間電圧と温
度を取り出す場合の最適な取り出し点の確認テストを行
った。We conducted a test to confirm the optimal point for extracting the voltage and temperature between the fuses using the load current during equipment operation.
ヒユーズ間電圧の検出位置については、第３図（ロ）に
示すようにＥＩ ＋ ”２ ｒ Ｂ３ の３ケ所（二
ついてテスト（第３図（イ）に結果を示す）したところ
、ヒユーズ製造メーカがヒユーズ銘板に記載している表
示抵抗値と一値するのは、Ｅ、のヒユーズ鏡板（０部）
であシ、本発明ではメーカ表示抵抗値を初期値（標準抵
抗値）として計算するので、電圧の検出ポイントはＥ、
のヒユーズ間が最適であることが判った。Regarding the detection position of the voltage between the fuses, as shown in Fig. 3 (b), we conducted a test at three locations (EI + "2 r B3" (results are shown in Fig. 3 (a)), and the results were determined by the fuse manufacturer. The fuse head plate (0 part) of E is equivalent to the indicated resistance value written on the fuse nameplate.
In the present invention, the resistance value indicated by the manufacturer is used as the initial value (standard resistance value) for calculation, so the voltage detection points are E,
It was found that the fuse spacing was optimal.
また、温度検中位置については■、■、◎の３ケ所につ
いて実験した。測定時の温度補正を行う゛ための部のヒ
ユーズエレメントの温度を検出することが最適であるが
、測定の困難性から現実には測定が不可能である。エレ
メント温度に近く、上昇カーブも近似している０点のヒ
ユーズ鏡板部ｒｖ測定値に、一定値を＋♂することで十
分近似出来ることが判った。Additionally, experiments were conducted at three locations, ■, ■, and ◎, regarding the temperature measurement positions. Although it is optimal to detect the temperature of the fuse element in the section for temperature correction during measurement, this is actually impossible due to the difficulty of measurement. It was found that the measured value of fuse end plate rv at point 0, which is close to the element temperature and whose rise curve is similar, can be sufficiently approximated by adding a certain value +♂.
上述の電圧と温度を同時に検出するためのクランプ装置
６を発明者等は開発した。第４図はその斜視図である。The inventors have developed a clamp device 6 for simultaneously detecting the voltage and temperature described above. FIG. 4 is a perspective view thereof.
硬質ゴムで出来たＵ字型支持６０の凹部内側端に銅製の
爪６１を固定し、爪の先端内側に温度センサー６３を設
けて、温度端子と接続し、さらに爪に電圧端子を接続す
る。他端にはネジ６３で移動可能な爪６２を配置して、
電圧端子を接続し、爪間隔を調整可能に構成したもので
ある。A copper claw 61 is fixed to the inner end of the recess of a U-shaped support 60 made of hard rubber, a temperature sensor 63 is provided inside the tip of the claw, and is connected to a temperature terminal, and a voltage terminal is further connected to the claw. A claw 62 that can be moved with a screw 63 is arranged on the other end,
The voltage terminal is connected and the spacing between the claws can be adjusted.
測定時はヒユーズを装置に取り付けたまま、クランプ装
置６の爪部をヒユーズの鏡板部■にあて、鏡板部の温度
と電圧を同時に測定するものである。At the time of measurement, the claw portion of the clamp device 6 is applied to the end plate part (2) of the fuse with the fuse attached to the device, and the temperature and voltage of the end plate part are simultaneously measured.
さらに電流の検出位置については、三相交流電源の場合
、一般に交流側の電流センサーと直流側の分流器から取
り出す方法があるが、位置によりその出力波形は異なる
。直流側ではサイリスタの転流時に重９角があり、一時
交流側で短絡して電流が流れるため、ヒユーズに流れる
電流は交流側で測定すべきである。Furthermore, regarding the current detection position, in the case of a three-phase AC power supply, there is generally a method of extracting the current from a current sensor on the AC side and a shunt on the DC side, but the output waveform differs depending on the position. On the DC side, there is a double 9-angle when the thyristor commutates, and the current flows through a temporary short circuit on the AC side, so the current flowing to the fuse should be measured on the AC side.
直流電源の場合はどこでもよく、特に規定しない。また
、稼動中の負荷電流を最も簡単に取り出せる方法として
、クランプ式電流計で測定する方法がよい。In the case of a DC power supply, it can be anywhere, and there are no particular regulations. Furthermore, the easiest way to obtain the load current during operation is to measure it with a clamp-type ammeter.
また、本発明では設備稼動中の測定であるため、負荷の
変動により電圧波形や電流波形が変動するが、変動する
瞬時々で計算することで、常に一定の抵抗値を測定出来
る演算機能を持たせた。In addition, since the present invention measures the equipment while it is in operation, the voltage and current waveforms fluctuate due to changes in the load, but by calculating the instantaneous fluctuations, it has a calculation function that can always measure a constant resistance value. I set it.
以下、本発明方法を第１図の一実施例で詳細に説明する
。Hereinafter, the method of the present invention will be explained in detail with reference to an embodiment shown in FIG.
ｌは三相交流電源、２．２′はヒユーズ、３，３′はサ
イリスタ、４はモータで、これらが低圧（ＡＣ６００Ｖ
以下）の動力設備を構成し、抵抗値はクランプ式電流計
５と電圧、温度測定用のり°ランプ装置６により測定さ
れる。l is a three-phase AC power supply, 2.2' is a fuse, 3, 3' is a thyristor, and 4 is a motor, which are low voltage (AC600V)
The resistance value is measured by a clamp-type ammeter 5 and a glue lamp device 6 for measuring voltage and temperature.
“測定された信号はＡ／Ｄ変換器？、除算器８、加減算
器９、温度基準設定器１０、演算器１１．温度補正係数
設定器１２、標準抵抗値設定器１３、比較器１４、判定
基準設定器１５により処理され、ヒユーズの劣化が判定
され、その結果を表示装置１６、プリンター１７に出力
される。番号７〜１７の器機は１セツト（二まとめられ
、携帯して持ち運び可能になっている。“Is the measured signal from the A/D converter?, divider 8, adder/subtractor 9, temperature reference setter 10, arithmetic unit 11, temperature correction coefficient setter 12, standard resistance value setter 13, comparator 14, judgment The process is performed by the standard setting device 15, the deterioration of the fuse is determined, and the results are output to the display device 16 and printer 17. ing.
設備稼動中の負荷電流を利用して、例えばＷ相ヒユーズ
２ （２’）の抵抗値を測定し、劣化を判定する方法は
、交流側のケーブルにクランプ式電流計５を設け、ヒユ
ーズ２は装置に固定したままで、ヒユーズ２の両端に電
圧と温度を測定するクランプ装置６をあてる。A method for determining deterioration by measuring, for example, the resistance value of W-phase fuse 2 (2') using the load current during equipment operation, is to install a clamp-type ammeter 5 on the AC side cable, and Clamp devices 6 for measuring voltage and temperature are applied to both ends of the fuse 2 while it remains fixed to the device.
測定信号はそれぞれＡ／Ｄ変換器７でディジタル信号に
変換され、変動する電圧（Ｖ）と電流（Ａ）値は除算器
８（二人力され瞬時値で計算され、抵抗値Ｒｔ’が出力
される。Each measurement signal is converted into a digital signal by an A/D converter 7, and the fluctuating voltage (V) and current (A) values are converted into a digital signal by a divider 8 (both input and calculated as instantaneous values, and a resistance value Rt' is output. Ru.
又温度信号（Ｔ２）は加算器９に入力され、＋α（＋１
０“Ｃ）されてエレメント温度に直され、さらに温度基
準設定器ｌＯから、基準温度Ｔ。（常温）を引いた差信
号Ｔが出力される。Also, the temperature signal (T2) is input to the adder 9, and +α(+1
0"C) and corrected to the element temperature, and further, a difference signal T obtained by subtracting the reference temperature T. (room temperature) is output from the temperature reference setting device IO.
出力信号ＴとＲｔ’は演算器１１に入力され、設定器１
２．１３からの温度補正係数α（例えば０．００３８ｍ
Ω）と標準抵抗値ＲＯ（例えば０．２５４ｍΩ）を基に
、温度補正された抵抗増加率＝Ｒ１′（１−αＴ）−Ｒ
ｏ／ＲＯが計算される。The output signals T and Rt' are input to the calculator 11, and the setting device 1
Temperature correction coefficient α from 2.13 (e.g. 0.0038m
Ω) and the standard resistance value RO (for example, 0.254 mΩ), temperature-corrected resistance increase rate = R1' (1-αT) - R
o/RO is calculated.
計算された抵抗増加率は比較器１４に入力され、判定基
準設定器１５の基準（第２図イ９口のテーブルが入って
いる。）値と比較され、劣化状態の結果を表示装置１６
、プリンター１７に出力するものである。The calculated resistance increase rate is input to the comparator 14, where it is compared with the reference value of the judgment criterion setter 15 (containing the table shown in Figure 2 A), and the result of the deterioration state is displayed on the display device 16.
, to be output to the printer 17.
標準抵抗値設定器１３に設定される値は、ヒユーズの種
類により異なるので、そのっど設定される。また温度補
正係数設定器１２に設定される値は、ヒユーズの材質に
より異なり、Ａｐ の場合は０．００３８であるが、使
用される代表的な数種類の平均値を用いてもよい。The value set in the standard resistance value setter 13 varies depending on the type of fuse, so it is set each time. Further, the value set in the temperature correction coefficient setting device 12 varies depending on the material of the fuse, and is 0.0038 in the case of Ap, but an average value of several typical types used may be used.
ヒユーズの劣化の判定結果（＝基づいて、不良のヒユー
ズはただちに新しいヒユーズと交換を行い、ま゛た要注
意のものについては劣化の程度により定期検査（前後期
にわけて）の測定頻度を、従来より短かく（例えば半年
毎）して、破断を未然に防止するものである。Based on the determination result of fuse deterioration (=), defective fuses are immediately replaced with new fuses, and for those that require attention, the frequency of periodic inspections (divided into early and late periods) is adjusted depending on the degree of deterioration. This is shorter than conventional methods (for example, every six months) to prevent breakage.
（実施例）
第１図に示す持ち運び可能な測定器、演算装置を用いて
、熱延工場精整設備の電動機（ＤＣ２００Ｖ、３０ＯＡ
）用サイリスタ装置のヒユーズ２４本の抵抗値を、稼動
中の負荷電流を利用して測定し、ヒユーズの劣化診断を
行ったところ、従来数時間かかつていたものが、３０分
間で診断結果が得られた。(Example) Using the portable measuring instrument and arithmetic device shown in Fig. 1, a motor (DC200V, 30OA
) The resistance values of 24 fuses in a thyristor device were measured using the load current during operation, and the deterioration of the fuses was diagnosed. Diagnosis results were obtained in 30 minutes, whereas previously it took several hours. It was done.
判定結果は良好１６本、要注意７本、不良１本という結
果を得た。The results were as follows: 16 were good, 7 needed attention, and 1 was bad.
不良と診断したヒユーズの抵抗増加率は６２．３％で、
分解点検と顕微鏡写真で確認した結果、ヒユーズエレメ
ントには亀裂が多数発生しており、破断寸前であったの
で、ただちに新しいヒユーズと交換した。The resistance increase rate of the fuse diagnosed as defective was 62.3%.
As a result of disassembly inspection and microscopic photography, the fuse element was found to have many cracks and was on the verge of breaking, so it was immediately replaced with a new fuse.
要注意の７木のうち、２本は抵抗増加率が２０〜４０Ｌ
％の間で、要注意後期に該当することから、検査周期を
早め、６ケ月後に再検査することとした。Of the seven trees that require attention, two have a resistance increase rate of 20 to 40L.
%, and falls under the late stage requiring caution, so we decided to move up the testing cycle and retest in 6 months.
（発明の効果）
以上説明した如く、本発明によれば、稼動中の低圧動中
設備のヒユーズを、簡単に劣化診断が出来、以下の優れ
た効果を有する。（１）、ヒユーズを装置から取外すこ
となく測定が可能である。（２）。(Effects of the Invention) As explained above, according to the present invention, it is possible to easily diagnose the deterioration of fuses in operating low-pressure equipment, and has the following excellent effects. (1) Measurement is possible without removing the fuse from the device. (2).
抵抗測定用の電源装置が不用である。（３）、短時間（
従来法のｌ／１０程度）で多数のヒユーズの抵抗測定が
可能である。（４）、メータ読み取り等１人的誤差を含
む恐れが少ない。（５）、ヒユーズが熱的歪を受けた状
態での測定が可能である。（６）、ヒユーズ劣化から寿
命の予測ができ、繰り返し疲労によるヒユーズ破断の予
知が可能で、事故の未然防止が出来る。No power supply required for resistance measurement. (3), for a short time (
It is possible to measure the resistance of a large number of fuses at a rate of about 1/10 of the conventional method. (4) There is less risk of single-person errors such as meter reading. (5) Measurement can be performed while the fuse is thermally strained. (6) It is possible to predict the lifespan of fuses based on their deterioration, and it is possible to predict fuse rupture due to repeated fatigue, thereby making it possible to prevent accidents.
第１図は本発明のフロー図、第２図は抵抗増加率−ヒユ
ーズ寿命の図表、第３図（イ）は抵抗値−圧力検出ポイ
ントの図表、第３図（ロ）は本発明の部分説明図、第３
図（ハ）は温度一時間の図表、第４図は本発明のクラン
プ装置の斜視図である。
代理人 弁理士 茶野木 立 夫
−見１０図
ヒユーズ寿命 〔Ｚコ
第３図
電、圧Ｍ！呂氷水イン
ド口）
一８？間 （＠Figure 1 is a flow diagram of the present invention, Figure 2 is a diagram of resistance increase rate vs. fuse life, Figure 3 (a) is a diagram of resistance value vs. pressure detection point, and Figure 3 (b) is a diagram of the part of the present invention. Explanatory diagram, 3rd
Figure (C) is a temperature chart for one hour, and Figure 4 is a perspective view of the clamping device of the present invention. Agent Patent Attorney Tatsuo Chanoki - See Figure 10 Fuse Life [Z Co Figure 3 Electricity, Pressure M! Lu Bing Shui India Mouth) 18? while (@
Claims (1)
負荷電流とヒューズ間電圧と、ヒューズ温度を測定して
、該測定結果から温度補正した抵抗値を求め、該抵抗値
の該ヒューズの標準抵抗値と比べた抵抗増加率を求め、
該抵抗増加率を用いて、あらかじめ求めてある抵抗増加
率とヒューズ寿命との関係テーブルより、ヒューズの劣
化程度を判定することを特徴とする稼動中の低圧動力設
備のヒューズ劣化診断方法。The resistance value of the fuse of low-voltage power equipment is determined by measuring the load current, the voltage between the fuses, and the fuse temperature during operation of the equipment, and calculating the temperature-corrected resistance value from the measurement results. Find the resistance increase rate compared to the standard resistance value,
A method for diagnosing fuse deterioration in operating low-voltage power equipment, characterized in that the degree of deterioration of the fuse is determined using the resistance increase rate from a predetermined relationship table between the resistance increase rate and the fuse life.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27644686A JPS63131426A (en) | 1986-11-21 | 1986-11-21 | Fuse deterioration diagnosis of low pressure power equipment during operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27644686A JPS63131426A (en) | 1986-11-21 | 1986-11-21 | Fuse deterioration diagnosis of low pressure power equipment during operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63131426A true JPS63131426A (en) | 1988-06-03 |
Family
ID=17569542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27644686A Pending JPS63131426A (en) | 1986-11-21 | 1986-11-21 | Fuse deterioration diagnosis of low pressure power equipment during operation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63131426A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0755868A (en) * | 1994-06-03 | 1995-03-03 | Hitachi Ltd | Diagnostic system for apparatus/installation |
| JP2008193776A (en) * | 2007-02-01 | 2008-08-21 | Sanyo Electric Co Ltd | Power supply unit for vehicle |
| CN109073702A (en) * | 2016-12-12 | 2018-12-21 | 株式会社Lg化学 | Vehicle with the diagnostic system for electric fuse |
| JP2019526784A (en) * | 2016-06-20 | 2019-09-19 | イートン インテリジェント パワー リミテッドＥａｔｏｎ Ｉｎｔｅｌｌｉｇｅｎｔ Ｐｏｗｅｒ Ｌｉｍｉｔｅｄ | Monitoring system and method for detecting thermomechanical strain fatigue in electrical fuses |
-
1986
- 1986-11-21 JP JP27644686A patent/JPS63131426A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0755868A (en) * | 1994-06-03 | 1995-03-03 | Hitachi Ltd | Diagnostic system for apparatus/installation |
| JP2008193776A (en) * | 2007-02-01 | 2008-08-21 | Sanyo Electric Co Ltd | Power supply unit for vehicle |
| JP2011120472A (en) * | 2007-02-01 | 2011-06-16 | Sanyo Electric Co Ltd | Power supply apparatus for vehicle |
| JP2011139634A (en) * | 2007-02-01 | 2011-07-14 | Sanyo Electric Co Ltd | Power supply unit for vehicle |
| JP4740167B2 (en) * | 2007-02-01 | 2011-08-03 | 三洋電機株式会社 | Power supply for vehicle |
| JP2019526784A (en) * | 2016-06-20 | 2019-09-19 | イートン インテリジェント パワー リミテッドＥａｔｏｎ Ｉｎｔｅｌｌｉｇｅｎｔ Ｐｏｗｅｒ Ｌｉｍｉｔｅｄ | Monitoring system and method for detecting thermomechanical strain fatigue in electrical fuses |
| CN109073702A (en) * | 2016-12-12 | 2018-12-21 | 株式会社Lg化学 | Vehicle with the diagnostic system for electric fuse |
| EP3422028A4 (en) * | 2016-12-12 | 2019-03-20 | LG Chem, Ltd. | Vehicle comprising diagnostic system for electrical fuse |
| US10288665B2 (en) | 2016-12-12 | 2019-05-14 | Lg Chem, Ltd. | Vehicle having a diagnostic system for an electrical fuse |
| CN109073702B (en) * | 2016-12-12 | 2021-09-28 | 株式会社Lg化学 | Vehicle with diagnostic system for electrical fuses |
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