JPS6050458A - Constantly operating type insulation resistance meter - Google Patents
Constantly operating type insulation resistance meterInfo
- Publication number
- JPS6050458A JPS6050458A JP58157965A JP15796583A JPS6050458A JP S6050458 A JPS6050458 A JP S6050458A JP 58157965 A JP58157965 A JP 58157965A JP 15796583 A JP15796583 A JP 15796583A JP S6050458 A JPS6050458 A JP S6050458A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- insulation resistance
- resistance
- comparator
- insulating
- 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
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、電気機器の駆動回路における絶縁抵抗測定装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulation resistance measuring device in a drive circuit of an electrical device.
電動機、ヒータ等の駆動回路における絶縁抵抗の測定は
、従来ボータプル形絶縁抵抗計等により実際に測定しよ
うとする回路において測定していた。この場合ややもす
ると漏洩電流等により人的な危険が伴っていた。Insulation resistance in drive circuits for electric motors, heaters, etc. has conventionally been measured in the circuit to be actually measured using a voltaple insulation resistance tester or the like. In this case, there was a personal danger due to leakage current.
本発明は人的な危険がなく、電動機、ヒータ等の保守点
検をする際にも、ｆｆ！３縁抵抗の低下による劣化の度
合を早期発見可能な常時側定形絶縁抵抗測定装置を提供
することを目的とする。The present invention does not pose any danger to personnel, and can also be used for maintenance and inspection of electric motors, heaters, etc. It is an object of the present invention to provide a constant-side regular insulation resistance measuring device that can detect early the degree of deterioration due to a decrease in edge resistance.
本発明は電気機器の駆動回路における絶縁抵抗を電気機
器の停止中常時測定し、絶縁抵抗の低下を検出した場合
には回路をしゃ断又は警報を発する絶縁抵抗測定装置に
おいて、電流検出用抵抗の端子電圧と所定の基準電圧と
を比較する手段と、該比較手段からの出力によシ絶縁抵
抗の低下時に信号を出力する出力手段とからなり、駆動
回路とアース間の絶縁抵抗を通して流れる漏洩電流を常
時測定することを特徴とする常時Ｊｌ定形絶縁抵抗測定
装置である。The present invention provides an insulation resistance measuring device that constantly measures insulation resistance in a drive circuit of an electrical device while the electrical device is stopped, and if a decrease in insulation resistance is detected, cuts off the circuit or issues an alarm. It consists of a means for comparing the voltage with a predetermined reference voltage, and an output means for outputting a signal when the insulation resistance decreases based on the output from the comparison means, and is capable of reducing the leakage current flowing through the insulation resistance between the drive circuit and the ground. This is a constant Jl regular insulation resistance measuring device characterized by constant measurement.
本発明の一実施例を図面によシ説明すると、第１図にお
いてＸＯ，ＸＩ、Ｙは電磁コイル、Ｘｏ−１、Ｘｌ−１
，Ｙ−１、Ｙ−２は電磁接点、ＲＩＡ、 ＲＩＢ、ＲＩ
Ｃは短絡保護用の抵抗、Ｒ２は電流検出用の抵抗、Ｒ３
、Ｒ４は比較電圧発生用抵抗、Ｒ５、Ｒ６はコンパレー
タ入力保朽用の抵抗、Ｒ７はコンパレータのフィードバ
ック用の抵抗、１はコンパレータ、２は電動機、６はス
イッチ、４は直流電源、５は三相交流電源、ＲＯは電動
機２の駆動回路のｔ３縁抵抗、ＤＪ、Ｄ２、ＤＪは保護
用ダイオードである。One embodiment of the present invention will be explained with reference to the drawings. In FIG. 1, XO, XI, Y are electromagnetic coils, Xo-1, Xl-1
, Y-1, Y-2 are electromagnetic contacts, RIA, RIB, RI
C is a resistor for short circuit protection, R2 is a resistor for current detection, R3
, R4 is a resistor for generating a comparison voltage, R5 and R6 are resistors for comparator input retention, R7 is a resistor for feedback of the comparator, 1 is a comparator, 2 is a motor, 6 is a switch, 4 is a DC power supply, 5 is a The phase alternating current power supply, RO is the t3 edge resistance of the drive circuit of the motor 2, and DJ, D2, and DJ are protection diodes.
第１図において電磁接点Ｘ０−１が開いて電動機２が停
止されている場合に、駆動回路の絶縁抵抗ＲＯが低下し
ているか否かを検出して、絶縁抵抗ＲＯが低下している
場合には、電磁接点Ｙ−１を開いて駆動回路をしゃ断す
るものである。In Fig. 1, when the electromagnetic contact X0-1 is open and the motor 2 is stopped, it is detected whether or not the insulation resistance RO of the drive circuit is decreasing, and if the insulation resistance RO is decreasing, is for opening the electromagnetic contact Y-1 to cut off the drive circuit.
まずスイッチ６を手動で閉じると、電磁接点Ｙ−１は閉
じており、電磁コイルＸＯが励磁されるから電磁接点Ｘ
０−１が閉じて電動機２の駆動回路に電流が流れ、電動
機２が運転される。このとき電磁コイルＸ１も励磁し、
電磁接点Ｘ１−１が開くから絶縁抵抗検出回路６には電
流が流れない。したがって抵抗Ｒ２の両端電圧は０とな
り、コンノくレータ１のマイナス側入力電圧も０となる
。コンノ（レータ１のプラス側入力電圧は抵抗Ｒ３、Ｒ
４により直流′α源４を分圧した電圧が加えられている
ため、コンパレータ１の出力レベルは高い値となシ、電
磁コイルＹの両端電圧は小さい値となるから、該電磁コ
イルＹは励磁されず、接点Ｙ−１は閉じたままであり、
したがって電磁コイルＸＯが励磁されたままであるから
接点ｘｏ −ｉは閉じたままである。また、電磁コイル
Ｙが励磁されていないから接点Ｙ−２は開いたままでち
シ警報は発せられない。First, when switch 6 is closed manually, electromagnetic contact Y-1 is closed and electromagnetic coil XO is energized, so electromagnetic contact
0-1 is closed, current flows through the drive circuit of the motor 2, and the motor 2 is operated. At this time, the electromagnetic coil X1 is also excited,
Since the electromagnetic contact X1-1 is opened, no current flows through the insulation resistance detection circuit 6. Therefore, the voltage across the resistor R2 becomes 0, and the negative input voltage of the converter 1 also becomes 0. The positive input voltage of controller 1 is resistor R3, R
Since the voltage obtained by dividing the DC 'α source 4 by 4 is applied, the output level of the comparator 1 will not be a high value, and the voltage across the electromagnetic coil Y will be a small value, so the electromagnetic coil Y will be excited. contact Y-1 remains closed,
Therefore, the contact xo-i remains closed since the electromagnetic coil XO remains energized. Further, since the electromagnetic coil Y is not excited, the contact Y-2 remains open and no alarm is issued.
次にスイッチ３を開放すると、電磁コイルＸ１の励磁が
解け、ｂ接点Ｘ１−１が閉じ、検出回路６には短絡保護
用抵抗ＲＩＡ、 ＲＩＢ、 ＲＩＣ１絶縁抵抗ＲＯ１電
流検出用抵抗Ｒ２に直流電源４の電圧が加わシ、電流ｉ
が流れる。Next, when the switch 3 is opened, the excitation of the electromagnetic coil X1 is released and the b contact X1-1 is closed. When a voltage is applied, a current i
flows.
このとき、直流電源４の電圧をＶ、検眼用ダイオードＤ
１の電圧降下をＶＯとすると、電流ｉはで表わされる。At this time, the voltage of the DC power supply 4 is set to V, and the optometric diode D is
If the voltage drop of 1 is VO, the current i is expressed as.
従って抵抗ＲＩＡ、 ＲＩＢ、 ＲＩＣおよび抵抗Ｒ２
が既知であれば、電流ｉは絶縁抵抗ＲＯに対し逆比例的
な値となる。Therefore resistors RIA, RIB, RIC and resistor R2
If is known, the current i has a value inversely proportional to the insulation resistance RO.
よって、電流検出用抵抗Ｒ２の両端電圧は、絶縁抵抗Ｒ
Ｏに逆比例的な電圧が発生する。絶縁抵抗ＲＯが低下し
た場合には抵抗几２の両端電圧が大きい値となり、この
電圧がコンパレータ１のマイナス側に加えられる。コン
パレータ１のプラス側には抵抗Ｒ３、Ｒ４によって分圧
された一定の電圧が加わつているから、コンパレータ１
のマイナス側の入力電圧がプラス側の入力電圧より大き
くなると、コンパレータ１の出力レベルが反転し電磁コ
イルＹの両端電圧が大となるから電磁コイルＹが励磁さ
れ、接点Ｙ−１が開き、スイッチ３を閉としても電磁コ
イルＸＯ，ＸＩを励磁することができない。Therefore, the voltage across the current detection resistor R2 is equal to the insulation resistance R
A voltage inversely proportional to O is generated. When the insulation resistance RO decreases, the voltage across the resistor 2 becomes a large value, and this voltage is applied to the negative side of the comparator 1. Since a constant voltage divided by resistors R3 and R4 is applied to the positive side of comparator 1, comparator 1
When the input voltage on the negative side of Even if 3 is closed, the electromagnetic coils XO and XI cannot be excited.
従って絶縁抵抗ＲＯがある値に達した時にコンノくレー
タ１の出力により電磁コイルＹが励磁するように抵抗Ｒ
３、Ｒ４の分圧比を選定すれば、絶縁抵抗ＲＯの検出が
可能である。その場合コンノくレータ１が反転するよう
にしてもよい。Therefore, when the insulation resistance RO reaches a certain value, the electromagnetic coil Y is energized by the output of the converter 1.
3. By selecting the voltage division ratio of R4, it is possible to detect the insulation resistance RO. In that case, the controller 1 may be reversed.
まり、フィードバック用抵抗Ｒ７ｉｆ：コンノ（レータ
１のプラス側に正のフィードバックをかけ、絶縁抵抗Ｒ
Ｏの検出にヒステリシスをもたせるだめのものである。, feedback resistor R7if: contact (apply positive feedback to the positive side of resistor 1, insulation resistance R
This is to create hysteresis in the detection of O.
また、電磁コイルＹが励磁したことにより接点Ｙ−１を
電磁コイルｘＯＫ直列に接続することにより、絶縁が低
下している場合には運転ができないようにしてもよいし
、又は接点Ｙ−２を外部信号の轡報用として利用するこ
とも可能である。Furthermore, by connecting contact Y-1 in series with electromagnetic coil It can also be used for reporting external signals.
本発明は簡単に製作でき、電動機、ヒータ等の保守点検
をする際ＫＩＩ！３縁抵抗の低抵抗よる劣化の度合を早
期発見可能で、安全な、しかも電動機、ヒータ等の寿命
を延長し、機械装置類の運転管理の面から非常に優れた
効果がもたらされる。The present invention is easy to manufacture and is a great tool for maintenance and inspection of electric motors, heaters, etc. The degree of deterioration can be detected at an early stage due to the low resistance of the three-edge resistor, which is safe, extends the life of motors, heaters, etc., and has very excellent effects in terms of operational management of mechanical devices.
第１図は本発明の一実施例の回路図である。
１・・コンパレータ、２・・電動機、３・・・スイッチ
、４・・・直流電源、５・・・交流電源、６・・・検出
回路、ｘｏ、ｘｉ、ｙ・・・電磁コイル、Ｘｏ−１、Ｘ
ｌ−１、Ｙ−１，Ｙ−２・・・電磁接点、・ＲＯ・・・
絶縁抵抗、ＲＩＡ、ＲＩＢ、ＲＩＣ・・・短絡保護用抵
抗、Ｒ２・・・電流検出用抵抗、Ｒ３、Ｒ４・・・比較
電圧発生用抵抗、１５ 、 Ｒ６・・・コンパレータ入
力保護用抵抗、Ｒ７・・・フィードバック用抵抗、ＤＩ
、 Ｄ２ 、 Ｄ３・・・保護用ダイオード。
特許出願人 株式会社荏原電産
代理人弁理士 高 木 正 行
間 弁理士 千 １） 捻
回 弁理士 丸 山 隆 夫FIG. 1 is a circuit diagram of an embodiment of the present invention. 1... Comparator, 2... Electric motor, 3... Switch, 4... DC power supply, 5... AC power supply, 6... Detection circuit, xo, xi, y... Electromagnetic coil, Xo- 1.X
l-1, Y-1, Y-2... Electromagnetic contact, RO...
Insulation resistance, RIA, RIB, RIC... Resistor for short circuit protection, R2... Resistor for current detection, R3, R4... Resistor for comparison voltage generation, 15, R6... Resistor for comparator input protection, R7 ...Resistance for feedback, DI
, D2, D3...protective diodes. Patent applicant: Ebara Electric Co., Ltd. Representative Patent Attorney Masaru Takagi Yukoma Patent Attorney 11) Twisting Patent Attorney Takao Maruyama
Claims (1)
停止中常時測定し、絶縁抵抗の低下を検出した場合には
回路をしゃ断又はむ報を発する絶縁抵抗測定装置におい
て、電流検出用抵抗の端子電圧と所定の基準電圧とを比
較する手段と、該比較手段からの中力によし絶縁抵抗の
低下時に信号を出力する出力手段とからなシ、駆動回路
とアース間の絶縁抵抗を通して流れる漏洩電流を常時測
定することを特徴とする常時側定形絶縁抵抗測定装置。 ２、 前記電流検出用抵抗の端子電圧が直流電源によシ
発生した漏洩電流によって生じるものであり、前記所定
の基準電圧が直流電源の電圧を分圧用抵抗により分圧し
たものであシ、前記比較手段がコンパレータである特許
請求の範囲第１項記載の装置。 ３、 前記コンパレータの出力が小さい値となった場合
に励磁コイルを励磁し、ｂ接点を開として駆動回路を自
動的にしゃ断することを特徴とする特許請求の範囲第２
項記載の装置。[Scope of Claims] 1. In an insulation resistance measuring device that constantly measures the insulation resistance in a drive circuit of an electrical device while the electric meter is stopped, and cuts off the circuit or issues a warning when a decrease in insulation resistance is detected. , a means for comparing the terminal voltage of the current detection resistor with a predetermined reference voltage, and an output means for outputting a signal when the insulation resistance decreases depending on the neutral voltage from the comparison means, between the drive circuit and the ground. A constant-side regular insulation resistance measuring device characterized by constantly measuring the leakage current flowing through the insulation resistance of. 2. The terminal voltage of the current detection resistor is caused by a leakage current generated by the DC power source, and the predetermined reference voltage is the voltage of the DC power source divided by a voltage dividing resistor, 2. The device according to claim 1, wherein the comparison means is a comparator. 3. Claim 2, characterized in that when the output of the comparator becomes a small value, the excitation coil is excited and the b contact is opened to automatically cut off the drive circuit.
Apparatus described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58157965A JPS6050458A (en) | 1983-08-31 | 1983-08-31 | Constantly operating type insulation resistance meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58157965A JPS6050458A (en) | 1983-08-31 | 1983-08-31 | Constantly operating type insulation resistance meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6050458A true JPS6050458A (en) | 1985-03-20 |
Family
ID=15661312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58157965A Pending JPS6050458A (en) | 1983-08-31 | 1983-08-31 | Constantly operating type insulation resistance meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050458A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62125001A (en) * | 1985-11-20 | 1987-06-06 | ユニ・チヤ−ム株式会社 | Disposable diaper |
| JP2017173176A (en) * | 2016-03-24 | 2017-09-28 | 株式会社竹中電機 | Insulation resistance monitoring device, and monitoring method of the same, as well as electrically-driven control instrument |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514888B2 (en) * | 1973-06-19 | 1980-04-19 |
-
1983
- 1983-08-31 JP JP58157965A patent/JPS6050458A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514888B2 (en) * | 1973-06-19 | 1980-04-19 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62125001A (en) * | 1985-11-20 | 1987-06-06 | ユニ・チヤ−ム株式会社 | Disposable diaper |
| JPH0611278B2 (en) * | 1985-11-20 | 1994-02-16 | ユニ・チヤ−ム株式会社 | Disposable diapers |
| JP2017173176A (en) * | 2016-03-24 | 2017-09-28 | 株式会社竹中電機 | Insulation resistance monitoring device, and monitoring method of the same, as well as electrically-driven control instrument |
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