JP2005174634A - Preventive maintenance device of circuit breaker - Google Patents

Preventive maintenance device of circuit breaker Download PDF

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JP2005174634A
JP2005174634A JP2003410150A JP2003410150A JP2005174634A JP 2005174634 A JP2005174634 A JP 2005174634A JP 2003410150 A JP2003410150 A JP 2003410150A JP 2003410150 A JP2003410150 A JP 2003410150A JP 2005174634 A JP2005174634 A JP 2005174634A
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operation time
measuring
circuit
main contact
preventive maintenance
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Shunsuke Kato
俊介 加藤
Yasunobu Fujita
康信 藤田
Hirokatsu Koga
博勝 古賀
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Hitachi Ltd
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Hitachi Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a preventive maintenance device of a circuit breaker in which constitution is simple, correct judgment on abnormality can be made based on the operating time of the main contact considering fluctuations in the voltage of the operation power source of the release coil and input coil and/or changes in surrounding temperatures. <P>SOLUTION: As for this preventive maintenance device of the breaker, outside element measuring means (15, 16) to measure the outside elements such as operation power source voltage (P-N) of a release coil 4 and an input coil 5, and surrounding temperatures or the like, as well as a correcting means (17, 21) to correct either of the actual measured working time or the reference operating time based on the measured values by these outside elements measuring means (15, 16) are installed, and this is constituted to compare times after correction concerning the other of the actually measured operating time and the reference operating time by means of an abnormality judgment means (19). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は遮断器の予防保全装置に係り、特に、主接点の動作時間によって異常の有無を判定する遮断器の予防保全装置に関する。   The present invention relates to a preventive maintenance device for a circuit breaker, and more particularly to a preventive maintenance device for a circuit breaker that determines the presence / absence of an abnormality based on an operation time of a main contact.

一般に、主接点の動作時間を基準動作時間と比較して異常の有無を判定する遮断器の予防保全装置はよく知られている。   In general, a preventive maintenance device for a circuit breaker that determines the presence or absence of an abnormality by comparing the operation time of a main contact with a reference operation time is well known.

しかしながら、主接点の動作時間は、主接点の断続動作を指令する釈放用コイル及び投入用コイルの操作電源電圧の変動によって変動することがあり、この操作電源電圧を考慮しなければ遮断器の異常を正確に判断することはできない。   However, the operating time of the main contact may fluctuate due to fluctuations in the operating power supply voltage of the release coil and the closing coil that command the intermittent operation of the main contact. Cannot be determined accurately.

そこで釈放用コイル及び投入用コイルの操作電源電圧の変動を考慮した遮断器の予防保全装置が、例えば特許文献１に示すように、既に提案されている。   Therefore, as shown in Patent Document 1, for example, a preventive maintenance device for a circuit breaker has already been proposed in consideration of fluctuations in the operating power supply voltage of the release coil and the closing coil.

特開平６−２６７３６５号公報JP-A-6-267365

特許文献１に記載の遮断器の予防保全装置は、釈放用コイル及び投入用コイルの操作電源電圧の変動を考慮するために、複雑な検出回路を必要としている。   The preventive maintenance device for a circuit breaker described in Patent Document 1 requires a complicated detection circuit in order to consider fluctuations in the operation power supply voltage of the release coil and the closing coil.

また、主接点の動作時間の変動は、釈放用コイル及び投入用コイルの操作電源電圧の変動以外の周辺温度の変化によっても変動する。即ち、周辺温度の変化によって遮断器操作部分の潤滑油は粘度が変化し、この潤滑油の粘度変化によっても主接点の動作時間が変動する。しかしながら、特許文献１に記載の遮断器の予防保全装置には、これについての配慮はなされていない。   The fluctuation of the operation time of the main contact also fluctuates due to a change in the ambient temperature other than the fluctuation of the operating power supply voltage of the release coil and the closing coil. That is, the viscosity of the lubricating oil in the circuit breaker operating portion changes due to a change in the ambient temperature, and the operation time of the main contact also varies due to the change in the viscosity of the lubricating oil. However, the preventive maintenance device for a circuit breaker described in Patent Document 1 does not take this into consideration.

本発明の目的は、構成簡単にして、釈放用コイルと投入用コイルの操作電源電圧の変動又は／及び周辺温度の変化を考慮した動作時間から、遮断器の異常の判断を正確に行える遮断器の予防保全装置を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a circuit breaker having a simple structure and capable of accurately determining an abnormality of a circuit breaker from an operation time in consideration of fluctuations in operating power supply voltage of release coil and input coil and / or changes in ambient temperature. It is to provide a preventive maintenance apparatus.

本発明は上記目的を達成するために、釈放用コイル及び投入用コイルの操作電源電圧や周辺温度等の外的要素を測定する外的要素測定手段と、実測した動作時間と基準動作時間の一方を前記外的要素測定手段による測定値に基づいて補正する補正手段を設け、補正後の動作時間を異常判定手段によって実測した動作時間と基準動作時間の他方と比較するように構成したのである。   In order to achieve the above object, the present invention provides an external element measuring means for measuring external elements such as the operating power supply voltage and ambient temperature of the release coil and the closing coil, and one of the measured operation time and the reference operation time. Is provided on the basis of the measurement value obtained by the external element measuring means, and the corrected operation time is compared with the other of the reference operation time and the operation time actually measured by the abnormality determination means.

上記構成とすることで、測定された操作電源電圧や周辺温度での動作時間と、基準電圧や基準温度での動作時間とを比較して差を見ることができる。そして、その差で実測した動作時間を補正し、あるいは既に設定された基準動作時間を補正し、または基準動作時間を随時補正することで、補正された実測動作時間と基準動作時間、あるいは補正された基準動作時間と実測動作時間とを比較することで遮断器の異常の有無を正確に判断できるのである。   With the above configuration, a difference can be seen by comparing the operation time at the measured operating power supply voltage or the ambient temperature with the operation time at the reference voltage or the reference temperature. Then, the corrected actual operation time and the reference operation time are corrected by correcting the measured operation time based on the difference, correcting the reference operation time that has already been set, or correcting the reference operation time as needed. By comparing the reference operation time with the actually measured operation time, it is possible to accurately determine whether or not the breaker is abnormal.

以上説明したように本発明によれば、構成を複雑化することなく、釈放用コイルと投入用コイルの操作電源電圧の変動又は／及び周辺温度の変化を考慮した動作時間から正確に異常の判断を行える遮断器の予防保全装置を得ることができる。   As described above, according to the present invention, it is possible to accurately determine an abnormality from the operation time in consideration of fluctuations in the operation power supply voltage of the release coil and the input coil and / or changes in the ambient temperature without complicating the configuration. A circuit breaker preventive maintenance device capable of performing

以下本発明による遮断器の予防保全装置の一実施の形態を図１〜図３に基づいて説明する。   Hereinafter, an embodiment of a preventive maintenance device for a circuit breaker according to the present invention will be described with reference to FIGS.

主回路１に遮断器２が接続されており、この遮断器２は、前記主回路１を遮断したり接続したりして断続する動作を行う主接点３と、この主接点３を断続動作のために駆動する図示しない操作機に駆動指令を付与する釈放用コイル４及び投入用コイル５と、前記主接点３に機械的に連結されて連動する釈放用補助接点６及び投入用補助接点７とを備えている。   The circuit breaker 2 is connected to the main circuit 1, and the circuit breaker 2 performs an operation of interrupting the main circuit 1 by interrupting or connecting the main circuit 1, and the main contact 3 is intermittently operated. For this purpose, a release coil 4 and a closing coil 5 that give a drive command to an operating device (not shown) to be driven, a release auxiliary contact 6 and a closing auxiliary contact 7 that are mechanically connected to and interlocked with the main contact 3; It has.

前記釈放用コイル４及び投入用コイル５は、操作用電源Ｐ−Ｎ間に夫々並列に接続され、かつ前記釈放用コイル４及び投入用コイル５に釈放指令接点Ｘ１及び投入指令接点Ｘ２が夫々直列に接続されている。さらに、前記釈放用コイル４及び投入用コイル５の操作用電源Ｐ−Ｎ間には夫々電流検出器８，９が設けられると共に、各電流検出器８，９には電流検出回路１０，１１が接続されている。   The release coil 4 and the making coil 5 are connected in parallel between the operation power sources P-N, respectively, and the releasing command contact X1 and the making command contact X2 are in series with the releasing coil 4 and the making coil 5, respectively. It is connected to the. Furthermore, current detectors 8 and 9 are provided between the operation power sources PN of the release coil 4 and the closing coil 5, and current detectors 10 and 11 are provided in the current detectors 8 and 9, respectively. It is connected.

一方、前記釈放用補助接点６及び投入用補助接点７には、入力取り込み回路１２，１３が接続されている。   On the other hand, input release circuits 12 and 13 are connected to the release auxiliary contact 6 and the input auxiliary contact 7.

前記電流検出回路１０，１１及び入力取り込み回路１２，１３は、夫々動作時間計測回路１４に接続されている。   The current detection circuits 10 and 11 and the input capture circuits 12 and 13 are connected to an operation time measurement circuit 14, respectively.

このような回路構成によって、前記釈放用コイル４及び投入用コイル５に流れる電流を検出して時間計測起点指令とし、釈放用補助接点６及び投入用補助接点７からの信号を時間計測終了指令として前記動作時間計測回路１４で主接点３の実際の動作時間を計測している。   With such a circuit configuration, the current flowing through the release coil 4 and the closing coil 5 is detected and used as a time measurement starting command, and signals from the release auxiliary contact 6 and the charging auxiliary contact 7 are used as time measurement end commands. The operation time measuring circuit 14 measures the actual operation time of the main contact 3.

さらに、前記操作用電源Ｐ−Ｎ間には、操作電源電圧を測定する電圧測定回路１５が接続されており、前記遮断器２の近傍には周辺温度を測定する温度測定回路１６が設けられ、これら電圧測定回路１５及び温度測定回路１６からの出力は前記動作時間計測回路１４からの出力と共に動作時間補正回路１７に入力される。   Further, a voltage measurement circuit 15 for measuring an operation power supply voltage is connected between the operation power supplies PN, and a temperature measurement circuit 16 for measuring an ambient temperature is provided in the vicinity of the circuit breaker 2, The outputs from the voltage measurement circuit 15 and the temperature measurement circuit 16 are input to the operation time correction circuit 17 together with the output from the operation time measurement circuit 14.

前記動作時間補正回路１７からの出力は、トレンド管理装置１８に入力されると共に、異常判定回路１９に入力され、この異常判定回路１９で設定値入力回路２０によって設定された基準動作時間と比較される。   The output from the operation time correction circuit 17 is input to the trend management device 18 and also input to the abnormality determination circuit 19, and is compared with the reference operation time set by the set value input circuit 20 in the abnormality determination circuit 19. The

次に、以上のように構成された遮断器の予防保全装置の動作について説明する。尚、釈放用コイル４を励磁して主接点３を断路（開路）する場合と、投入用コイル５を励磁して主接点３を接続（閉路）する場合との動作はほとんど同じと考えることができるので、ここでは、釈放用コイル４を励磁して主接点３を断路（開路）する場合について説明する。   Next, the operation of the circuit breaker preventive maintenance apparatus configured as described above will be described. The operation of exciting the release coil 4 to disconnect the main contact 3 (opening) and the operation of exciting the closing coil 5 to connect the main contact 3 (closing) can be considered to be almost the same. Therefore, here, a case where the main contact 3 is disconnected (opened) by exciting the release coil 4 will be described.

通常、遮断器２は投入状態、即ち、主回路１を接続している状態にある。この状態で、例えば過電流を検出した信号が釈放指令接点Ｘ１に与えられると、操作用電源Ｐ−釈放用コイル４−操作用電源Ｎに電流が流れ、釈放用コイル４が励磁される。このため、釈放用コイル４は図示しない操作機に駆動指令を与えて遮断器２の主接点３を開放して主回路１を遮断する。同時に、釈放用コイル４に流れる電流を電流検出器８と電流検出回路１０によって検出し、動作時間計測回路１４に時間計測起点指令を与える。その後、遮断器２の主接点３が開路すると、主接点３と機械的に連結された補助接点６が閉路され、それを入力取り込み開路１２が時間計測終了指令として動作時間計測回路１４に与える。このようにして、動作時間計測回路１４によって実測された遮断器２の動作時間が動作時間補正回路１７に入力される。   Normally, the circuit breaker 2 is in the on state, that is, the state in which the main circuit 1 is connected. In this state, for example, when a signal that detects an overcurrent is applied to the release command contact X1, a current flows through the operation power supply P, the release coil 4 and the operation power supply N, and the release coil 4 is excited. For this reason, the release coil 4 gives a drive command to an operating device (not shown) to open the main contact 3 of the circuit breaker 2 and to shut off the main circuit 1. At the same time, the current flowing through the release coil 4 is detected by the current detector 8 and the current detection circuit 10, and a time measurement start command is given to the operation time measurement circuit 14. Thereafter, when the main contact 3 of the circuit breaker 2 is opened, the auxiliary contact 6 mechanically connected to the main contact 3 is closed, and this is input and the open circuit 12 is given to the operation time measurement circuit 14 as a time measurement end command. In this way, the operating time of the circuit breaker 2 measured by the operating time measuring circuit 14 is input to the operating time correction circuit 17.

さらに、電圧測定回路１５で測定された操作用電源Ｐ−操作用電源Ｎ間の操作電源電圧の実測値と及び温度測定回路１６で測定された周辺温度の実測値が動作時間補正回路１７に入力される。   Further, the actual measured value of the operating power supply voltage between the operating power supply P and the operating power supply N measured by the voltage measuring circuit 15 and the actual measured value of the ambient temperature measured by the temperature measuring circuit 16 are input to the operating time correction circuit 17. Is done.

動作時間補正回路１７には、操作電源電圧の変化と周辺温度の変化に対する遮断器２の動作時間とのデータが入力されている。操作電源電圧の変化と周辺温度の変化に対する遮断器２の動作時間のデータは、例えば、図２及び図３に示す関係にある。即ち、図２は、操作電源電圧と遮断器の動作時間の関係を試験により確認したもので、基準操作電源電圧を１００％としたときの電圧の変化に伴う動作時間の変化を示す。１００％基準操作電源電圧に対し電圧が低下して−２０％となったとき、動作時間は鎖線で示す基準動作時間に対して０〜＋１５％の範囲で変動し、１００％基準操作電源電圧に対し電圧が上昇して＋２０％となったとき、動作時間は０〜−１０％の範囲で変動することが確認された。図３は、周辺温度と遮断器の動作時間の関係を試験により確認したもので、基準温度を１００％としたときの温度変化に伴う動作時間の変化を示す。１００％基準温度に対し温度が低下して−２０℃となったとき、動作時間は鎖線で示す基準動作時間に対して０〜＋１０％の範囲で変動し、１００％基準温度に対し温度が上昇して＋６０℃となったとき、動作時間は０〜−５％の範囲で変動することが確認された。   The operating time correction circuit 17 is input with data on the change in operating power supply voltage and the operating time of the circuit breaker 2 with respect to the change in ambient temperature. The data of the operation time of the circuit breaker 2 with respect to the change of the operating power supply voltage and the change of the ambient temperature have the relationship shown in FIGS. That is, FIG. 2 shows the relationship between the operating power supply voltage and the circuit breaker operating time, and shows the change in operating time accompanying the change in voltage when the reference operating power supply voltage is 100%. When the voltage decreases to -20% with respect to the 100% reference operation power supply voltage, the operation time varies in the range of 0 to + 15% with respect to the reference operation time indicated by the chain line, and reaches 100% reference operation power supply voltage. On the other hand, when the voltage increased to + 20%, it was confirmed that the operating time fluctuated in the range of 0 to -10%. FIG. 3 shows the relationship between the ambient temperature and the circuit breaker operating time, and shows the change in the operating time accompanying the temperature change when the reference temperature is 100%. When the temperature drops to −20 ° C. with respect to the 100% reference temperature, the operation time varies in the range of 0 to + 10% with respect to the reference operation time indicated by the chain line, and the temperature rises with respect to the 100% reference temperature. When the temperature reached + 60 ° C., it was confirmed that the operation time fluctuated in the range of 0 to −5%.

いま、操作電源電圧が低下（あるいは上昇）して実測動作時間が長く（あるいは短く）なったときには、その分減算（あるいは加算して）して基準電源電圧による基準動作時間に補正する。さらに、温度が低下（あるいは上昇）して実測動作時間が長く（あるいは短く）なったときには、その分減算（あるいは加算して）して基準温度による基準動作時間に補正する。   Now, when the operation power supply voltage decreases (or increases) and the measured operation time becomes longer (or shorter), it is subtracted (or added) by that amount and corrected to the reference operation time based on the reference power supply voltage. Further, when the measured operation time becomes longer (or shorter) due to a decrease (or increase) in temperature, the reference operation time based on the reference temperature is corrected by subtracting (or adding) by that amount.

上記のように、操作電源電圧及び周辺温度を考慮して動作時間補正回路１７によって補正された実測動作時間は、トレンド管理装置１８に入力されて管理されると同時に、異常判定回路１９に入力され、設定値入力回路２０によって入力された基準動作時間と比較される。そして、補正後の実測動作時間が基準動作時間を超えた場合には遮断器２に異常ありと判断され、基準動作時間以内であれば異常なしと判断される。   As described above, the actually measured operation time corrected by the operation time correction circuit 17 in consideration of the operation power supply voltage and the ambient temperature is input to the trend management device 18 and managed, and simultaneously input to the abnormality determination circuit 19. The reference operation time input by the set value input circuit 20 is compared. Then, when the actually measured operation time after correction exceeds the reference operation time, it is determined that the circuit breaker 2 is abnormal, and when it is within the reference operation time, it is determined that there is no abnormality.

このように本実施の形態によれば、操作電源電圧及び周辺温度を動作時間補正回路１７に蓄積されたデータに基づいて補正することで、実測動作時間の変動が遮断器２の異常によるものか否かを判定できるので、複雑な検出回路を必要としない構成簡単な予防保全装置を得ることができる。   As described above, according to the present embodiment, by correcting the operation power supply voltage and the ambient temperature based on the data accumulated in the operation time correction circuit 17, is the fluctuation of the actually measured operation time caused by the abnormality of the circuit breaker 2? Therefore, it is possible to obtain a preventive maintenance apparatus with a simple configuration that does not require a complicated detection circuit.

尚、本実施の形態において、主接点の断続動作を指令する主接点駆動指令手段は、釈放用コイル４及び投入用コイル５と釈放指令接点Ｘ１及び投入指令接点Ｘ２であり、この主接点駆動指令手段の動作を検出して出力信号を発する第１の動作確認手段は、電流検出器８，９及び電流検出回路１０，１１である。また、前記主接点の断続動作を検出して出力信号を発する第２の動作確認手段は、釈放用補助接点６及び投入用補助接点７と補助接点動作確認開路である入力取り込み回路１２，１３である。これら第１の動作確認手段と第２の動作確認手段からの出力信号に基づいて前記主接点駆動指令手段の断続動作指令から前記主接点の断続動作終了までの動作時間を計測する動作時間計測手段は、動作時間計測回路１４である。さらに、この動作時間計測手段による実測作動時間と基準動作時間とを比較して異常の有無を判定する異常判定手段は、異常判定回路１９であり、外的要素を測定する外的要素測定手段である電圧測定装置及び温度測定装置は、電圧測定回路１５及び温度測定回路１６である。そして、外的要素測定手段による測定値に基づいて前記実測作動時間と前記基準動作時間の一方を補正する補正手段は、動作時間補正回路１７である。   In the present embodiment, the main contact driving command means for commanding the main contact intermittent operation is the release coil 4 and the closing coil 5, the release command contact X1 and the closing command contact X2, and this main contact driving command. The first operation confirmation means for detecting the operation of the means and generating an output signal is the current detectors 8 and 9 and the current detection circuits 10 and 11. The second operation confirmation means for detecting the intermittent operation of the main contact and generating an output signal includes the release auxiliary contact 6, the input auxiliary contact 7, and the input capturing circuits 12 and 13 which are auxiliary contact operation confirmation open circuits. is there. An operation time measuring means for measuring an operation time from the intermittent operation command of the main contact driving command means to the end of the intermittent operation of the main contact based on output signals from the first operation confirmation means and the second operation confirmation means. Is an operating time measuring circuit 14. Further, the abnormality determination means for comparing the actual operation time by the operation time measurement means and the reference operation time to determine the presence or absence of abnormality is the abnormality determination circuit 19, which is an external element measurement means for measuring external elements. One voltage measuring device and temperature measuring device are a voltage measuring circuit 15 and a temperature measuring circuit 16. The correction means for correcting one of the actually measured operation time and the reference operation time based on the measurement value by the external element measurement means is the operation time correction circuit 17.

次に、本発明による遮断器の予防保全装置の第二の実施の形態を図４に基づいて説明する。既述の第一の実施の形態が、実測した動作時間を操作電源電圧や周辺温度を考慮して補正し、それを基準動作時間と比較して異常の有無を判断するものであるのに対し、本実施の形態は、基準動作時間を操作電源電圧や周辺温度を考慮して補正し、それを実測動作時間と比較して異常の有無を判断するものである。   Next, a second embodiment of the circuit breaker preventive maintenance apparatus according to the present invention will be described with reference to FIG. In contrast to the first embodiment described above, the measured operation time is corrected in consideration of the operating power supply voltage and the ambient temperature, and compared with the reference operation time to determine whether there is an abnormality. In this embodiment, the reference operation time is corrected in consideration of the operation power supply voltage and the ambient temperature, and compared with the actually measured operation time, the presence / absence of an abnormality is determined.

即ち、図４において、電圧測定回路１５及び温度測定回路１６からの出力を、設定値入力開路２０で設定した基準動作時間の設定値と共に、補正手段である基準動作時間補正回路２１に入力する。この基準動作時間補正回路２１で、第一の実施の形態と同じように、図２及び図３に示す周辺温度や操作電源電圧に対する動作時間の変化のデータを考慮して設定された基準動作時間を補正する回路構成としたのである。そして、補正された基準動作時間を異常判定回路１９に入力させ、これを動作時間計測回路１４で実測した動作時間と比較して遮断器２の異常の有無を判断するのである。また、補正された基準動作時間は、トレンド管理装置１８に入力されて管理される。   That is, in FIG. 4, the outputs from the voltage measurement circuit 15 and the temperature measurement circuit 16 are input to the reference operation time correction circuit 21 which is correction means, together with the set value of the reference operation time set by the set value input circuit 20. In this reference operation time correction circuit 21, as in the first embodiment, the reference operation time set in consideration of the data of the change in operation time with respect to the ambient temperature and the operation power supply voltage shown in FIGS. This is a circuit configuration for correcting the above. Then, the corrected reference operation time is input to the abnormality determination circuit 19 and compared with the operation time actually measured by the operation time measurement circuit 14 to determine whether the circuit breaker 2 is abnormal. The corrected reference operation time is input to the trend management device 18 and managed.

尚、図４において、図１と同一符号は同一物を示すので、再度の詳細な説明は省略する。   In FIG. 4, the same reference numerals as those in FIG.

本実施の形態によれば、周辺温度や操作電源電圧の変化に基づいて基準動作時間を補正することで、実測動作時間の変動が周辺温度や操作電源電圧の変化に基づくものなのか否かを確認できるので、遮断器２の異常の有無を正確に判断することができる。   According to the present embodiment, by correcting the reference operation time based on the change in the ambient temperature and the operation power supply voltage, it is determined whether or not the variation in the actual measurement operation time is based on the change in the ambient temperature and the operation power supply voltage. Since it can confirm, the presence or absence of abnormality of the circuit breaker 2 can be judged correctly.

また、第二の実施の形態においては、設定した基準動作時間を補正するものであるが、図５に示す本発明による遮断器の予防保全装置の第三の実施の形態は、随時、基準動作時間を更新する点で異なる。即ち、電圧測定回路１５及び温度測定回路１６からの出力を、図２及び図３に示す周辺温度や操作電源電圧に対する動作時間の変化のデータを考慮して、基準動作時間を随時設定値入力回路２０にて更新するのである。そして、随時更新された基準動作時間を異常判定回路１９に入力して動作時間計測回路１４で実測動作時間と比較するようにしても、前記各実施の形態と同じ効果を奏することができる。   Further, in the second embodiment, the set reference operation time is corrected. However, the third embodiment of the preventive maintenance device for a circuit breaker according to the present invention shown in FIG. It differs in that the time is updated. That is, the output from the voltage measurement circuit 15 and the temperature measurement circuit 16 is set to the reference value input circuit as needed by considering the data of the change in the operation time with respect to the ambient temperature and the operation power supply voltage shown in FIGS. It is updated at 20. Even if the reference operation time updated as needed is input to the abnormality determination circuit 19 and compared with the actual operation time by the operation time measurement circuit 14, the same effects as those of the above-described embodiments can be obtained.

尚、図５においても、図１及び図４と同一符号は同一物を示すので、再度の詳細な説明は省略する。   In FIG. 5 as well, the same reference numerals as those in FIGS. 1 and 4 indicate the same components, and thus detailed description thereof is omitted.

本発明による遮断器の予防保全装置の第一の実施の形態を示す回路図。The circuit diagram which shows 1st embodiment of the preventive maintenance apparatus of the circuit breaker by this invention. 操作電源電圧の変化に対する動作時間の変動を示す線図。The diagram which shows the fluctuation | variation of the operation time with respect to the change of the operation power supply voltage. 周辺温度の変化に対する動作時間の変動を示す線図。The diagram which shows the fluctuation | variation of the operation time with respect to the change of ambient temperature. 本発明による遮断器の予防保全装置の第二の実施の形態を示す回路図。The circuit diagram which shows 2nd embodiment of the preventive maintenance apparatus of the circuit breaker by this invention. 本発明による遮断器の予防保全装置の第三の実施の形態を示す回路図。The circuit diagram which shows 3rd embodiment of the preventive maintenance apparatus of the circuit breaker by this invention.

符号の説明Explanation of symbols

１…主開路、２…遮断器、３…主接点、４…釈放用コイル、５…投入用コイル、６…釈放用補助接点、７…投入用補助接点、８，９…電流検出器、１０，１１…電流検出回路、１２，１３…入力取り込み回路、１４…動作時間計測回路、１５…電圧測定回路、１６…温度測定回路、１７…動作時間補正回路、１８…トレンド管理装置、１９…異常判定回路、２０…設定値入力回路、２１…基準動作時間補正回路、Ｐ−Ｎ…操作用電源。
DESCRIPTION OF SYMBOLS 1 ... Main open circuit, 2 ... Circuit breaker, 3 ... Main contact, 4 ... Release coil, 5 ... Release coil, 6 ... Release contact, 7 ... Release contact, 8, 9 ... Current detector, 10 , 11 ... Current detection circuit, 12, 13 ... Input capture circuit, 14 ... Operation time measurement circuit, 15 ... Voltage measurement circuit, 16 ... Temperature measurement circuit, 17 ... Operation time correction circuit, 18 ... Trend management device, 19 ... Abnormality Determination circuit, 20... Set value input circuit, 21... Reference operation time correction circuit, PN.

Claims (5)

主回路を断続するように動作する主接点と、この主接点の断続動作を指令する主接点駆動指令手段と、この主接点駆動指令手段の動作を検出して出力信号を発する第１の動作確認手段と、前記主接点の断続動作を検出して出力信号を発する第２の動作確認手段と、これら第１の動作確認手段と第２の動作確認手段からの出力信号に基づいて前記主接点駆動指令手段の断続動作指令から前記主接点の断続動作終了までの動作時間を実測する動作時間計測手段と、この動作時間計測手段による実測作動時間と基準動作時間とを比較して異常の有無を判定する異常判定手段とを備えた遮断器の予防保全装置において、
外的要素を測定する外的要素測定手段と、前記実測作動時間と前記基準動作時間の一方を前記外的要素測定手段による測定値に基づいて補正する補正手段とを設け、補正後の時間を前記異常判定手段によって前記実測作動時間と前記基準動作時間の他方と比較するように構成したことを特徴とする遮断器の予防保全装置。 A main contact that operates so as to interrupt the main circuit, a main contact drive command means for commanding the intermittent operation of the main contact, and a first operation check for detecting an operation of the main contact drive command means and generating an output signal Means, second operation confirming means for detecting an intermittent operation of the main contact and generating an output signal, and driving the main contact based on output signals from the first operation confirming means and the second operation confirming means. The operation time measuring means for actually measuring the operation time from the intermittent operation command of the command means to the end of the intermittent operation of the main contact is compared with the measured operation time by the operation time measuring means and the reference operation time to determine whether there is an abnormality. In a preventive maintenance device for a circuit breaker equipped with an abnormality determining means for
External element measurement means for measuring an external element, and correction means for correcting one of the actual operation time and the reference operation time based on a measurement value by the external element measurement means are provided, and the time after correction is provided. A preventive maintenance device for a circuit breaker configured to compare with the other of the measured operation time and the reference operation time by the abnormality determination means. 前記外的要素測定手段は、前記主接点駆動指令手段の操作電源電圧を測定する電圧測定装置であることを特徴とする請求項１記載の遮断器の予防保全装置。   2. The circuit breaker preventive maintenance apparatus according to claim 1, wherein the external element measuring means is a voltage measuring apparatus for measuring an operating power supply voltage of the main contact driving command means. 前記外的要素測定手段は、周辺温度を測定する温度測定装置であることを特徴とする請求項１記載の遮断器の予防保全装置。   2. The circuit breaker preventive maintenance apparatus according to claim 1, wherein the external element measuring means is a temperature measuring device for measuring an ambient temperature. 前記外的要素測定手段は、前記主接点駆動指令手段の操作電源電圧を測定する電圧測定装置と周辺温度を測定する温度測定装置とから構成されていることを特徴とする請求項１記載の遮断器の予防保全装置。   2. The interruption according to claim 1, wherein the external element measuring means comprises a voltage measuring device for measuring an operating power supply voltage of the main contact driving command means and a temperature measuring device for measuring an ambient temperature. Preventive maintenance equipment. 主回路を断続するように動作する主接点と、この主接点の断続動作を指令する釈放用コイル及び投入用コイルと、これら釈放用コイル及び投入用コイルの電流を検出して出力信号を発する電流検出回路と、前記主接点に連動する補助接点と、この補助接点の信号を検出して出力信号を発する補助接点動作確認回路と、前記電流検出回路と前記補助接点動作確認回路からの出力信号に基づいて前記断続動作の指令から前記主接点の断続動作終了までの動作時間を計測する動作時間計測手段と、この動作時間計測手段による実測作動時間と基準動作時間とを比較して異常の有無を判定する異常判定手段とを備えた遮断器の予防保全装置において、
前記釈放用コイル及び投入用コイルの操作電源電圧を測定する電圧測定装置又は／及び周辺温度を測定する温度測定装置と、これら電圧測定装置又は／及び温度測定装置による測定値に基づいて前記実測作動時間と前記基準動作時間の一方を補正する動作時間補正回路を設け、補正後の時間を前記異常判定手段によって前記実測作動時間と前記基準動作時間の他方と比較するように構成したことを特徴とする遮断器の予防保全装置。
A main contact that operates so as to interrupt the main circuit, a release coil and a closing coil that command the intermittent operation of the main contact, and a current that generates an output signal by detecting the current of the release coil and the closing coil A detection circuit, an auxiliary contact linked to the main contact, an auxiliary contact operation confirmation circuit that detects a signal of the auxiliary contact and generates an output signal, and an output signal from the current detection circuit and the auxiliary contact operation confirmation circuit. The operation time measuring means for measuring the operation time from the intermittent operation command to the end of the main contact intermittent operation based on this, and comparing the actual operation time by the operation time measurement means and the reference operation time to determine whether there is an abnormality In a preventive maintenance device for a circuit breaker provided with an abnormality determining means for determining,
The voltage measuring device for measuring the operating power supply voltage of the release coil and the input coil and / or the temperature measuring device for measuring the ambient temperature, and the actual measurement operation based on the measured value by the voltage measuring device or / and the temperature measuring device. An operation time correction circuit for correcting one of the time and the reference operation time is provided, and the corrected time is configured to be compared with the other of the actually measured operation time and the reference operation time by the abnormality determination means. Preventive maintenance device for circuit breakers.
JP2003410150A 2003-12-09 2003-12-09 Preventive maintenance device of circuit breaker Pending JP2005174634A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273157A (en) * 2006-03-30 2007-10-18 Mitsubishi Electric Corp Circuit breaker monitoring device and circuit breaker monitoring method
WO2008047439A1 (en) * 2006-10-19 2008-04-24 Mitsubishi Electric Corporation Power converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273157A (en) * 2006-03-30 2007-10-18 Mitsubishi Electric Corp Circuit breaker monitoring device and circuit breaker monitoring method
JP4715587B2 (en) * 2006-03-30 2011-07-06 三菱電機株式会社 Circuit breaker monitoring device and circuit breaker monitoring method
WO2008047439A1 (en) * 2006-10-19 2008-04-24 Mitsubishi Electric Corporation Power converter
JPWO2008047439A1 (en) * 2006-10-19 2010-02-18 三菱電機株式会社 Power converter
US8049455B2 (en) 2006-10-19 2011-11-01 Mitsubishi Electric Corporation Electric power converter

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