JPH0923565A - Monitoring circuit of protective relay device - Google Patents
Monitoring circuit of protective relay deviceInfo
- Publication number
- JPH0923565A JPH0923565A JP7172039A JP17203995A JPH0923565A JP H0923565 A JPH0923565 A JP H0923565A JP 7172039 A JP7172039 A JP 7172039A JP 17203995 A JP17203995 A JP 17203995A JP H0923565 A JPH0923565 A JP H0923565A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- monitoring circuit
- relay
- monitoring
- relay device
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は常時監視機能を備えた保
護継電装置の監視回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring circuit for a protective relay device having a constant monitoring function.
【0002】[0002]
【従来の技術】近年、電力系統の超高圧化が進み重要度
を増すにつれ、保護継電装置もより信頼性が要求されて
いる。一般に、保護継電装置自体の信頼度を向上させる
ために自動監視方式を採用している。この自動監視方式
は常時監視と自動点検の2つから構成されているが、前
者の常時監視は平常時あり得ない動作が一定時間継続し
たとき異常と判定し、主として誤動作側の不良を検出す
る監視方式である。2. Description of the Related Art In recent years, as the power system has become extremely high in voltage and is becoming more important, protective relay devices are required to have higher reliability. Generally, an automatic monitoring system is adopted to improve the reliability of the protective relay device itself. This automatic monitoring system is composed of two types of constant monitoring and automatic inspection, but the former constant monitoring mainly determines a malfunction side defect by determining an abnormality when an operation that cannot be performed normally continues for a certain period of time. It is a monitoring method.
【0003】保護継電装置の責務で最も重要な機能の一
つは、遮断器引き外し回路及び遮断器投入回路を例外な
く常時監視回路にて監視することであり、この監視目的
は一般的には断線による不良を対象にしている。万一、
遮断器引き外し回路または遮断器投入回路に断線が発生
すると、遮断器に引き外し指令または投入指令が出され
ないので、電力系統に大きな影響を及ぼすことは言うま
でもない。One of the most important functions of the protective relay device is to constantly monitor the circuit breaker trip circuit and the circuit breaker closing circuit without exception, and the purpose of this monitoring is generally. Targets defects due to wire breaks. By any chance
Needless to say, when a break occurs in the circuit breaker trip circuit or the circuit breaker closing circuit, the circuit breaker is not issued with a trip command or a circuit closing command, so that the power system is greatly affected.
【0004】一方、後者の自動点検は保護継電装置の定
期点検作業を自動的に実施することであるが、この保護
継電装置の定期的な点検作業実施時または遮断器の点検
作業実施時の際、保護継電装置の遮断器引き外し回路及
び遮断器投入回路は一旦開路した上で行うのが一般的で
ある。この遮断器引き外し回路及び遮断器投入回路の開
路は人間系で行うのが普通であり、特に点検作業が終了
し保護継電装置を再運用する場合、運用に入る前に遮断
器引き外し回路及び遮断器投入回路が正常であることを
確認してから運用を再開している。これら一連の作業は
すべて人間系で行われている。従って、遮断器引き外し
回路が多数存在するような保護継電装置の場合は、作業
時間が大幅に長くなっているのが現状である。On the other hand, the latter automatic inspection is to automatically perform the periodic inspection work of the protective relay device, but at the time of the periodic inspection work of the protective relay device or the inspection work of the circuit breaker. In this case, it is general that the breaker trip circuit and the breaker closing circuit of the protective relay device are opened once. The circuit breaker trip circuit and the circuit breaker closing circuit are normally opened by a human system, especially when the protective relay is re-operated after the inspection work is completed and the circuit breaker trip circuit is opened. And the operation is restarted after confirming that the circuit breaker closing circuit is normal. All of these series of work are done by humans. Therefore, in the case of a protective relay device having a large number of circuit breaker trip circuits, it is the current situation that the working time is significantly long.
【0005】次に、以上述べた内容を図5に示す従来の
遮断器引き外し回路を参照して説明する。同図におい
て、P,Nは制御電源、11a1と12a1は遮断器引き外
し指令用継電器接点、TT1 は短絡片を持った試験用端
子、TCは遮断器の引き外しコイル、TCa1は遮断器の
a接点、SW1は回路を遮断するためのスイッチ、PC
11,PC12はフォトカプラ、R11,R12は抵
抗、AND13はAND回路、OR11,OR12はO
R回路、NOT14はNOT回路である。The above description will be described with reference to the conventional circuit breaker trip circuit shown in FIG. In the figure, P and N are control power supplies, 11a1 and 12a1 are relay contacts for a circuit breaker trip command, TT1 is a test terminal with a shorting piece, TC is a circuit breaker trip coil, and TCa1 is a circuit breaker a. Contact, SW1 is a switch for breaking the circuit, PC
11 and PC12 are photocouplers, R11 and R12 are resistors, AND13 is an AND circuit, and OR11 and OR12 are O.
The R circuit and NOT14 are NOT circuits.
【0006】平常時、遮断器引き外し指令用継電器接点
11a1及び12a1は、不動作のため「開」であり、引き
外し電流は流れない。このため、平常時は抵抗R11と
R12の定数により決まる電流がフォトカプラPC1
1,PC12を通じ遮断器の引き外しコイルTCに流れ
ている。この常時流れている電流は抵抗R11とR12
により小さな値に抑えられ、遮断器の引き外しコイルT
Cがどんな場合でも動作しないように考慮されている。
このように常時、遮断器引き外し回路TCには微小電流
が流れており、この微小電流によりフォトカプラPC1
1,PC12が導通している。At normal times, the circuit breaker trip command relay contacts 11a1 and 12a1 are "open" because they do not operate, and no trip current flows. Therefore, in a normal condition, the current determined by the constants of the resistors R11 and R12 is the photocoupler PC1.
1, through PC12 to the trip coil TC of the circuit breaker. This constantly flowing current is applied to resistors R11 and R12.
Is suppressed to a small value by the trip coil T of the circuit breaker.
It is considered that C does not work in any case.
In this way, a minute current constantly flows through the circuit breaker trip circuit TC, and the minute current causes the photocoupler PC1 to operate.
1, PC12 is conducting.
【0007】従って、試験用端子TT1や遮断器引き外
しコイルTC、遮断器のa接点TCa1、更にこれらを接
続している電線などに断線が発生すると、フォトカプラ
PC11,PC12に電流が流れなくなり、フォトカプ
ラPC11,PC12は非導通になり、引き外し回路不
良として出力される。また、遮断器引き外し指令用継電
器接点11a1,12a1と並列に各々にフォトカプラPC
11,PC12を接続することにより直接接点を監視し
ている。Therefore, if a break occurs in the test terminal TT1, the breaker trip coil TC, the a-contact TCa1 of the breaker, or the wire connecting them, no current will flow in the photocouplers PC11 and PC12. The photocouplers PC11 and PC12 become non-conducting and are output as a tripping circuit failure. Also, a photocoupler PC is provided in parallel with each of the circuit breaker trip command relay contacts 11a1 and 12a1.
11 and PC12 are directly connected to monitor the contact.
【0008】一方、保護継電装置の定期的な点検作業や
遮断器の点検作業を実施する場合は、点検時の不要な保
護継電装置動作出力を防止するため、試験用端子TT1
の短絡片を外している。このためフォトカプラPC1
1,PC12に流れていた微小電流が遮断されるため、
監視ロックにより引き外し回路不良出力をロックする。
また遮断器が「開」の場合も同様に、引き外し回路不良
をロックする。On the other hand, when the inspection work of the protective relay device and the inspection work of the circuit breaker are carried out regularly, in order to prevent unnecessary protective relay device operation output at the time of inspection, the test terminal TT1 is used.
The short-circuit piece of is removed. Therefore, the photo coupler PC1
1, because the minute current that was flowing to PC12 is cut off,
Lock the trip circuit fault output by monitoring lock.
Similarly, when the breaker is open, the trip circuit failure is locked.
【0009】ここで、従来の保護継電装置の定期的な点
検作業や遮断器の点検作業を実施する際の操作手順を図
8のフローチャートに示す。すなわち、保護継電装置の
定期的な点検作業や遮断器の点検作業の場合には監視を
ロックし、試験用端子TT1の短絡片を外してから保護
継電装置の点検を開始する。この保護継電装置の定期的
な点検作業や遮断器の点検作業が終了し、運用を再開す
る前に試験用端子TT1の短絡片を接続するが、接続前
に試験用端子TT1の上部(P側)の電位を測定し、継
電器接点11a1及び12a1が開であることを電位がない
ことで確認する。その際フォトカプラPC11,PC1
2を介し電圧が回り込むためスイッチSW1で開路する
必要があった。試験用端子TT1の短絡片を接続する
と、監視ロック設定は解除される。Here, a flowchart of FIG. 8 shows an operation procedure for carrying out the periodical inspection work of the conventional protective relay device and the inspection work of the circuit breaker. That is, in the case of the periodic inspection work of the protective relay device and the inspection work of the circuit breaker, the monitoring is locked, and the short circuit piece of the test terminal TT1 is removed, and then the inspection of the protective relay device is started. After the regular inspection work of this protective relay device and the inspection work of the circuit breaker are completed and the short-circuit piece of the test terminal TT1 is connected before the operation is resumed, the upper part (P) of the test terminal TT1 is connected before the connection. Side) and measure the potential of the relay contacts 11a1 and 12a1 to confirm that they are open. At that time, photocouplers PC11 and PC1
Since the voltage circulates via 2, it was necessary to open the circuit with the switch SW1. When the short-circuit piece of the test terminal TT1 is connected, the monitor lock setting is released.
【0010】図6は従来の遮断器引き外し用シールイン
回路図である。同図において、P,Nは制御電源、11
a2と12a2は遮断器引き外し指令用継電器接点、TT2
は短絡片を持った試験用端子、X,Yはシールイン継電
器、FX,MXはシールイン継電器の接点、TCa2は遮
断器のa接点、SW2は回路を遮断するためのスイッ
チ、PC21,PC22はフォトカプラ、R21,R2
2は抵抗、AND23はAND回路、OR21,OR2
2はOR回路、NOT24はNOT回路である。FIG. 6 is a conventional seal-in circuit diagram for tripping a circuit breaker. In the figure, P and N are control power supplies, 11
a2 and 12a2 are relay contacts for circuit breaker trip command, TT2
Is a test terminal with a short-circuit piece, X and Y are seal-in relays, FX and MX are contacts of the seal-in relay, TCa2 is a contact of a circuit breaker, SW2 is a switch for breaking the circuit, and PC21 and PC22 are Photo coupler, R21, R2
2 is a resistor, AND 23 is an AND circuit, OR 21 and OR 2
2 is an OR circuit, and NOT 24 is a NOT circuit.
【0011】平常時、遮断器引き外し指令用継電器接点
11a2及び12a2は、不動作のため「開」であり、引き
外し電流は流れない。このため、平常時は抵抗R21と
R22の定数により決まる電流がフォトカプラPC2
1,PC22を通じ遮断器の引き外しコイルに流れてい
る。この常時流れている電流は抵抗R21とR22によ
り小さな値に抑えられ、シールイン継電器XおよびYが
どんな場合でも動作しないように考慮されている。この
ように常時、遮断器引き外し回路には微小電流が流れて
おり、この微小電流によりフォトカプラPC21,PC
22が導通している。In normal times, the circuit breaker trip command relay contacts 11a2 and 12a2 are "open" because they are inoperative, and no trip current flows. Therefore, in a normal condition, the current determined by the constants of the resistors R21 and R22 is the photocoupler PC2.
1, flowing through the PC 22 to the trip coil of the circuit breaker. This constantly flowing current is suppressed to a small value by the resistors R21 and R22, and it is considered that the seal-in relays X and Y do not operate in any case. In this way, a minute current always flows through the circuit breaker trip circuit, and this minute current causes the photocouplers PC21, PC
22 is conducting.
【0012】従って、試験用端子TT2やシールイン継
電器XおよびY、遮断器のa接点TCa2、更にこれらを
接続している電線などに断線が発生すると、フォトカプ
ラPC21,PC22に電流が流れなくなり、フォトカ
プラPC21,PC22は非導通になり、引き外し回路
不良として出力される。またシールイン継電器Xおよび
Yの接点FXおよびMXと並列に各々にフォトカプラP
C21,PC22を接続することにより直接接点を監視
している。Therefore, when disconnection occurs in the test terminal TT2, the seal-in relays X and Y, the a-contact TCa2 of the breaker, and the electric wire connecting them, no current flows through the photocouplers PC21 and PC22. The photocouplers PC21 and PC22 become non-conducting and are output as a tripping circuit failure. In addition, a photo coupler P is provided in parallel with the contacts FX and MX of the seal-in relays X and Y, respectively.
Direct contact is monitored by connecting C21 and PC22.
【0013】一方、保護継電装置の定期的な点検作業や
遮断器の点検作業を実施する場合は、点検時の不要な保
護継電装置動作出力を防止するため、試験用端子TT2
の短絡片を外している。このためフォトカプラPC2
1,PC22に流れていた微小電流が遮断されるため、
監視ロックにより引き外し回路不良出力をロックする。
また遮断器が「開」の場合も同様に、引き外し回路不良
をロックする。On the other hand, when the inspection work of the protective relay device or the inspection work of the circuit breaker is carried out, in order to prevent unnecessary protective relay device operation output at the time of inspection, the test terminal TT2 is used.
The short-circuit piece of is removed. Therefore, the photo coupler PC2
1, Because the minute electric current that was flowing to PC22 is cut off,
Lock the trip circuit fault output by monitoring lock.
Similarly, when the breaker is open, the trip circuit failure is locked.
【0014】図7は従来の遮断器投入回路図である。同
図において、P,Nは制御電源、11a3と12a3は遮断
器投入指令用継電器接点、TT3は短絡片を持った試験
用端子、CCは遮断器の投入コイル、SW3は回路を遮
断するためのスイッチ、PC31,PC32はフォトカ
プラ、R31,R32は抵抗、AND33はAND回
路、OR31,OR32はOR回路、NOT34はNO
T回路である。FIG. 7 is a circuit diagram of a conventional circuit breaker closing circuit. In the figure, P and N are control power supplies, 11a3 and 12a3 are circuit breaker closing command relay contacts, TT3 is a test terminal with a shorting piece, CC is a circuit breaker closing coil, and SW3 is a circuit breaking circuit. Switches, PC31 and PC32 are photocouplers, R31 and R32 are resistors, AND33 is an AND circuit, OR31 and OR32 are OR circuits, and NOT34 is NO.
This is a T circuit.
【0015】平常時、遮断器投入指令用継電器接点11
a3及び12a3は不動作のため「開」であり、投入電流は
流れない。このため、平常時は抵抗R31とR32の定
数により決まる電流が、フォトカプラPC31,PC3
2を通じ遮断器の投入コイルCCに流れている。この常
時流れている電流は抵抗R31とR32により小さな値
に抑えられ、遮断器の投入コイルCCがどんな場合でも
動作しないように考慮されている。このように常時、遮
断器投入回路には微小電流が流れており、この微小電流
によりフォトカプラPC31,PC32が導通してい
る。Normally, the relay contact 11 for the circuit breaker closing command
Since a3 and 12a3 are inactive, they are "open", and no making current flows. Therefore, in a normal state, the current determined by the constants of the resistors R31 and R32 is the photocouplers PC31 and PC3.
2 through the closing coil CC of the circuit breaker. This constantly flowing current is suppressed to a small value by the resistors R31 and R32, and it is considered that the closing coil CC of the circuit breaker does not operate in any case. As described above, a minute current constantly flows in the circuit breaker closing circuit, and the minute current causes the photocouplers PC31 and PC32 to be in conduction.
【0016】従って、試験用端子TT3や投入コイルC
C、更にこれらを接続している電線などに断線が発生す
ると、フォトカプラPC31,PC32に電流が流れな
くなり、フォトカプラPC31,PC32は非導通にな
り、投入回路不良として出力される。また、遮断器投入
指令用継電器接点11a3,12a3と並列に各々にフォト
カプラを接続することにより直接接点を監視している。Therefore, the test terminal TT3 and the closing coil C
C, and if an electric wire or the like connecting them is disconnected, no current flows in the photocouplers PC31 and PC32, the photocouplers PC31 and PC32 become non-conductive, and the output is made as a closing circuit failure. Further, a photocoupler is connected in parallel with each of the circuit breaker closing command relay contacts 11a3 and 12a3 to directly monitor the contacts.
【0017】一方、保護継電装置の定期的な点検作業や
遮断器の点検作業を実施する場合は、点検時の不要な保
護継電装置動作出力を防止するため、試験用端子TT3
の短絡片を外している。このためフォトカプラPC3
1,PC32に流れていた微小電流が遮断されるため、
監視ロックにより投入回路不良出力をロックする。また
遮断器が「開」の場合も同様に、投入回路不良をロック
する。On the other hand, when the inspection work of the protective relay device and the inspection work of the circuit breaker are carried out, in order to prevent unnecessary protective relay device operation output at the time of inspection, the test terminal TT3 is used.
The short-circuit piece of is removed. Therefore, the photo coupler PC3
1, Because the minute current that was flowing to PC32 is cut off,
Locking the closing circuit output by monitoring lock. Similarly, when the circuit breaker is "open", the closing circuit failure is locked.
【0018】[0018]
【発明が解決しようとする課題】上記したように、従来
技術では保護継電装置の点検時や遮断器の点検時などの
際、監視ロックにより不良出力をロックするので、遮断
器引き外し指令用の継電器接点及び遮断器投入指令用継
電器接点を直接監視することができなかった。As described above, in the prior art, when the protective relay is inspected or the circuit breaker is inspected, the faulty output is locked by the monitoring lock, so that the circuit breaker trip command is issued. It was not possible to directly monitor the relay contact and the breaker closing command relay contact.
【0019】また、保護継電装置の点検や遮断器の点検
が終了し、保護継電装置を運用する際試験用端子の短絡
片を接続する前に試験による電位測定の作業が必要とな
り、試験用端子が多い保護継電装置は作業時間が長くな
る等の問題があった。Further, after the inspection of the protective relay device and the inspection of the circuit breaker are completed, it is necessary to perform a potential measurement work by a test before connecting the short-circuit piece of the test terminal when operating the protective relay device. The protective relay device with many terminals has problems such as long working time.
【0020】本発明は上記課題を解決するためになされ
たもので、その目的は保護継電装置や遮断器の点検時等
の際、遮断器引き外し指令用の継電器接点及び遮断器投
入指令用継電器接点を直接監視することができ、また保
護継電装置や遮断器の点検が終了し、保護継電装置装置
を運用する際、試験用端子の短絡片を接続する前に試験
器による電位測定の作業が不要となる保護継電装置の監
視回路を提供することにある。The present invention has been made to solve the above problems, and its purpose is to provide a relay contact and a breaker closing command for a breaker trip command when inspecting a protective relay or a breaker. The relay contact can be directly monitored, and the inspection of the protective relay and circuit breaker is completed, and when operating the protective relay device, measure the potential with the tester before connecting the test terminal short-circuit piece. It is an object of the present invention to provide a monitoring circuit for a protective relay device that does not require the work of
【0021】[0021]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項1は、遮断器に引き外し指令あるい
は投入指令を与えるとき閉路する第1の継電器接点およ
び第2の継電器接点と、当該保護継電装置の試験の時に
開路される試験用端子と、前記遮断器の引き外しコイル
あるいは投入コイルとが直列に接続された遮断器引き外
し回路あるいは遮断器投入回路を備える保護継電装置の
監視回路において、前記第1の継電器接点と並列に接続
され該第1の継電器接点の動作状態を常時監視する第1
の監視回路と、前記第2の継電器接点と並列に接続され
該第2の継電器接点の動作状態を常時監視する第2の監
視回路と、前記試験用端子および前記引き外しコイルあ
るいは投入コイルの直列回路と並列に接続され該試験用
端子および前記引き外しコイルあるいは投入コイルの直
列回路を平常時監視し、当該保護継電装置の試験の時ロ
ックされる第3の監視回路とを具備することを特徴とす
る。In order to achieve the above object, claim 1 of the present invention provides a first relay contact and a second relay contact which are closed when a trip command or a closing command is given to a circuit breaker. And a protective relay having a circuit breaker trip circuit or a circuit breaker closing circuit in which a test terminal opened at the time of testing the protective relay device and a trip coil or closing coil of the circuit breaker are connected in series. A first monitoring circuit of an electric device, which is connected in parallel with the first relay contact and constantly monitors an operating state of the first relay contact.
Monitoring circuit, a second monitoring circuit which is connected in parallel with the second relay contact and constantly monitors the operating state of the second relay contact, and the test terminal and the trip coil or closing coil in series. A third monitoring circuit connected in parallel with the circuit for normally monitoring the test terminal and the series circuit of the trip coil or the closing coil, and being locked when the protection relay device is tested. Characterize.
【0022】本発明の請求項2は、請求項1の保護継電
装置の監視回路において、前記第1の監視回路、第2の
監視回路および第3の監視回路をフォトカプラとするこ
とを特徴とする。According to a second aspect of the present invention, in the monitoring circuit of the protective relay device according to the first aspect, the first monitoring circuit, the second monitoring circuit and the third monitoring circuit are photocouplers. And
【0023】本発明の請求項3は、遮断器に引き外し指
令あるいは投入指令を与えるとき閉路する第1の継電器
接点および第2の継電器接点と、当該保護継電装置の試
験の時に開路される試験用端子と、前記遮断器の引き外
しコイルあるいは投入コイルとが直列に接続された遮断
器引き外し回路あるいは遮断器投入回路を備える保護継
電装置の監視回路において、前記第1の継電器接点と並
列に接続され、前記引き外しコイルあるいは投入コイル
が動作しない微小電流が流れているか否かにより該第1
の継電器接点の動作状態を常時監視する第1の監視回路
と、前記第2の継電器接点と並列に接続され、前記微小
電流が流れているか否かにより該第2の継電器接点の動
作状態を常時監視する第2の監視回路と、前記試験用端
子および前記引き外しコイルあるいは投入コイルの直列
回路と並列に接続され、前記試験用端子が開路されたと
き前記微小電流をバイパスさせるバイパル回路とを具備
することを特徴とする。According to a third aspect of the present invention, the first relay contact and the second relay contact which are closed when the trip command or the closing command is given to the circuit breaker, and the protection relay device is opened when the protection relay device is tested. In a monitoring circuit of a protective relay device comprising a circuit breaker trip circuit or a circuit breaker closing circuit in which a test terminal and a trip coil or closing coil of the circuit breaker are connected in series, the first relay contact and The first coil is connected in parallel, and the first coil is operated depending on whether or not a minute current is flowing that does not operate the trip coil or the closing coil.
The first monitoring circuit for constantly monitoring the operating state of the relay contact and the second relay contact are connected in parallel, and the operating state of the second relay contact is constantly maintained depending on whether or not the minute current is flowing. A second monitoring circuit for monitoring; and a bipal circuit connected in parallel with the test terminal and the series circuit of the trip coil or the closing coil and bypassing the minute current when the test terminal is opened. It is characterized by doing.
【0024】本発明の請求項4は、遮断器に引き外し指
令あるいは投入指令を与えるとき閉路する第1の継電器
接点および第2の継電器接点と、当該保護継電装置の試
験の時に開路される試験用端子と、前記遮断器の引き外
しコイルあるいは投入コイルとが直列に接続された遮断
器引き外し回路あるいは遮断器投入回路を備える保護継
電装置の監視回路において、前記第1の継電器接点と並
列に接続され該第1の継電器接点の動作状態を常時監視
する第1の監視回路と、前記第2の継電器接点と並列に
接続され該第2の継電器接点の動作状態を常時監視する
第2の監視回路と、前記第1の監視回路および前記第2
の監視回路がともに各継電器接点の開路状態を検出して
いるとき表示出力する表示回路とを具備することを特徴
とする。According to a fourth aspect of the present invention, the first relay contact and the second relay contact which are closed when a trip command or a closing command is given to the circuit breaker and an open circuit when the protection relay device is tested. In a monitoring circuit of a protective relay device comprising a circuit breaker trip circuit or a circuit breaker closing circuit in which a test terminal and a trip coil or closing coil of the circuit breaker are connected in series, the first relay contact and A first monitoring circuit connected in parallel for constantly monitoring the operating state of the first relay contact; and a second monitoring circuit connected in parallel with the second relay contact for constantly monitoring the operating state of the second relay contact Monitoring circuit, the first monitoring circuit and the second monitoring circuit
And a display circuit that outputs a display when the open state of each relay contact is detected.
【0025】本発明の請求項5は、開放指令あるいは投
入指令を与えるとき動作させるシールイン継電器と、前
記シールイン継電器が動作したとき閉路するシールイン
継電器接点と、当該保護継電装置の試験の時に開路され
る試験用端子とが直列に接続されたシールイン回路を備
える保護継電装置の監視回路において、前記シールイン
継電器接点と並列に接続され該シールイン継電器接点の
動作状態を常時監視する第1の監視回路と、前記試験用
端子および前記シールイン継電器の直列回路と並列に接
続され該試験用端子および前記シールイン継電器の直列
回路を平常時監視し、当該保護継電装置の試験の時ロッ
クされる第2の監視回路とを具備することを特徴とす
る。According to a fifth aspect of the present invention, a seal-in relay which is operated when an opening command or a closing command is given, a seal-in relay contact which is closed when the seal-in relay operates, and a test of the protective relay device are performed. In a monitoring circuit of a protective relay device that includes a seal-in circuit in which a test terminal that is opened at times is connected in series, the operating state of the seal-in relay contact is constantly monitored by being connected in parallel with the seal-in relay contact. The first monitoring circuit is connected in parallel with the series circuit of the test terminal and the seal-in relay, and the series circuit of the test terminal and the seal-in relay is normally monitored to check the protection relay device. And a second monitoring circuit that is locked at the same time.
【0026】本発明の請求項6は、開放指令あるいは投
入指令を与えるとき動作させるシールイン継電器と、前
記シールイン継電器が動作したとき閉路するシールイン
継電器接点と、当該保護継電装置の試験の時に開路され
る試験用端子とが直列に接続されたシールイン回路を備
える保護継電装置の監視回路において、前記シールイン
継電器接点と並列に接続され該シールイン継電器接点の
動作状態を常時監視する監視回路と、前記監視回路がシ
ールイン継電器接点の開路状態を検出しているとき表示
出力する表示回路とを具備することを特徴とする。According to a sixth aspect of the present invention, a seal-in relay which is operated when an opening command or a closing command is given, a seal-in relay contact which is closed when the seal-in relay is operated, and a test of the protection relay device are conducted. In a monitoring circuit of a protective relay device that includes a seal-in circuit in which a test terminal that is opened at times is connected in series, the operating state of the seal-in relay contact is constantly monitored by being connected in parallel with the seal-in relay contact. It is characterized by comprising a monitoring circuit and a display circuit which outputs a display when the monitoring circuit detects the open state of the seal-in relay contact.
【0027】[0027]
【作用】本発明の保護継電装置の監視回路によると、遮
断器の引き外しコイルや投入コイルと並列に監視回路を
追加することで、保護継電装置や遮断器の点検時におい
ても遮断器引き外し回路や遮断器投入回路の監視をロッ
クする必要がなくなるので、継続的に監視することが可
能になり、早期に不良検出ができる。According to the monitoring circuit of the protective relay device of the present invention, by adding the monitoring circuit in parallel with the trip coil and the closing coil of the circuit breaker, the circuit breaker is inspected even when the protective relay device and the circuit breaker are inspected. Since it is not necessary to lock the monitoring of the trip circuit and the circuit breaker closing circuit, it is possible to continuously monitor and detect defects early.
【0028】[0028]
【実施例】以下、本発明の実施例を図について説明す
る。図1は本発明の一実施例である保護継電装置の回路
図であり、本実施例が既に説明した図5の従来の保護継
電装置と相違する点は、フォトカプラPC13、NOT
回路NOT11,12,13、AND回路AND11、
OR回路OR13及びランプL1を追加し、スイッチS
W1を不要とした点であり、その他の点は同様であるの
で、同一部分には同一符号を付して重複説明は省略す
る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a circuit diagram of a protective relay device according to an embodiment of the present invention. The present embodiment is different from the conventional protective relay device of FIG. 5 in that the photocoupler PC13 and NOT are different.
Circuit NOT11, 12, 13, AND circuit AND11,
OR circuit OR13 and lamp L1 are added, and switch S
Since W1 is not necessary and the other points are the same, the same portions are denoted by the same reference numerals and duplicate description will be omitted.
【0029】同図に示すように、フォトカプラPC11
及びPC12の出力状態をNOT回路11,12を介
し、AND回路11にて継電器接点11a1,12a1のい
ずれかが閉路していないかを検出し、閉路していない場
合、ランプL1が表示することにより、従来、保護継電
装置の運用を再開する際に行っていた試験用端子のP側
を試験器で測定することがなくなり、試験用端子の短絡
片を接続することが可能となる。これにより保護継電装
置の運用を再開する際の作業時間を大幅に短縮すること
ができる。また従来遮断器引き外し回路の断線監視をフ
ォトカプラPC11,PC12を介して行っていたが、
フォトカプラPC13とNOT回路13を追加するだけ
で従来と同様に断線監視を行うことができる。As shown in the figure, the photocoupler PC11
The output state of the PC 12 and the output state of the PC 12 are detected by the AND circuit 11 through the NOT circuits 11 and 12 to detect whether one of the relay contacts 11a1 and 12a1 is closed, and when it is not closed, the lamp L1 is displayed. Now, the P side of the test terminal, which was conventionally performed when restarting the operation of the protective relay device, is no longer measured by the tester, and the short-circuit piece of the test terminal can be connected. As a result, the working time when the operation of the protective relay device is restarted can be greatly reduced. In addition, the circuit breaker trip circuit was previously monitored for disconnection via the photocouplers PC11 and PC12.
Just by adding the photocoupler PC13 and the NOT circuit 13, the disconnection can be monitored as in the conventional case.
【0030】また、本実施例は、上記したようにフォト
カプラPC13を追加したことにより、保護継電装置や
遮断器の点検時に試験用端子TT1の短絡片を開放した
場合や遮断器を「開」とした場合においても、監視用の
電流が遮断されることなく流れるので、継電器接点11
a1,12a1の誤動作監視も継続できる。Further, in this embodiment, by adding the photocoupler PC13 as described above, when the short circuit piece of the test terminal TT1 is opened or the breaker is opened when the protective relay or the breaker is inspected. In this case, since the monitoring current flows without interruption, the relay contact 11
Malfunction monitoring of a1 and 12a1 can be continued.
【0031】なお、図4のフローチャートは、上記した
本実施例による保護継電装置の定期的な点検作業や遮断
器の点検作業を実施する際の操作手順を示したものであ
る。すなわち、保護継電装置の定期的な点検作業や遮断
器の点検作業の場合には監視をロックし、試験用端子T
T1の短絡片を外してから保護継電装置の点検を開始す
る。この保護継電装置の点検作業や遮断器の点検作業が
終了すると、運用を再開するために試験用端子TTの短
絡片を接続する必要があるが、ランプL1点灯有で継電
器接点11a1,12a1が開であることが確認できる。継
電器接点11a1,12a1のいずれかが閉路していないか
を検出し、閉路していない場合ランプL1が表示するの
で原因を調査する。ランプL1が表示すると、試験用端
子TT1の短絡片を接続し、監視ロック設定は解除され
る。The flow chart of FIG. 4 shows an operation procedure for carrying out the periodical inspection work of the protective relay device and the circuit breaker inspection work according to the present embodiment. That is, in the case of the periodic inspection work of the protective relay device and the inspection work of the circuit breaker, the monitoring is locked and the test terminal T
Start the inspection of the protective relay device after removing the short-circuit piece of T1. When the inspection work of this protective relay device and the inspection work of the circuit breaker are completed, it is necessary to connect the short-circuit piece of the test terminal TT to restart the operation, but the lamp contacts L11 and 12a1 It can be confirmed that it is open. It is detected whether any one of the relay contacts 11a1 and 12a1 is not closed, and if it is not closed, the lamp L1 is displayed and the cause is investigated. When the lamp L1 displays, the short-circuit piece of the test terminal TT1 is connected and the monitoring lock setting is released.
【0032】次に、不良検出の作用について説明する。
平常時、遮断器引き外し指令用継電器接点11a1及び1
2a1は、不動作のため「開」であり、引き外し電流は流
れない。このため、平常時は抵抗R11とR12の定数
により決まる電流がフォトカプラPC11,PC12を
通じ遮断器の引き外しコイルTCに流れている。この常
時流れている電流は抵抗R11とR12により小さな値
に抑えられ、遮断器の引き外しコイルTCがどんな場合
でも動作しないように考慮されている。このように常
時、遮断器引き外し回路TCには微小電流が流れてお
り、この微小電流によりフォトカプラPC11,PC1
2が導通している。尚、抵抗R13によりフォトカプラ
PC13には電流は流れず、フォトカプラPC13は非
導通になる。Next, the function of defect detection will be described.
Normally, the circuit breaker trip command relay contacts 11a1 and 1
2a1 is "open" because it does not operate, and no trip current flows. Therefore, normally, a current determined by the constants of the resistors R11 and R12 flows through the trip coil TC of the circuit breaker through the photocouplers PC11 and PC12. This constantly flowing current is suppressed to a small value by the resistors R11 and R12, and it is considered that the trip coil TC of the circuit breaker does not operate in any case. In this way, a minute current constantly flows through the circuit breaker trip circuit TC, and the minute current causes the photocouplers PC11 and PC1 to operate.
2 is conducting. Note that no current flows through the photocoupler PC13 due to the resistor R13, and the photocoupler PC13 becomes non-conductive.
【0033】従って、試験用端子TT1や遮断器の引き
外しコイルTC、遮断器のa接点TCa1、更にこれらを
接続している電線などに断線が発生すると、引き外しコ
イルTCに流れていた電流がフォトカプラPC13,抵
抗R13を介して流れることになる。すると、フォトカ
プラPC11,PC12には電流が流れ続け、フォトカ
プラPC11,PC12は導通のままとなり、出力リレ
ー不良は出力しない。しかし、フォトカプラPC13が
導通になり、NOT13,AND13を介して引き外し
回路不良として出力される。また、遮断器引き外し指令
用継電器接点11a1,12a1と並列に各々にフォトカプ
ラPC11,PC12を接続することにより直接接点を
監視している。つまり、例えば接点12a1が閉路する
と、平常時フォトカプラPC12を流れていた電流が接
点12a1を介して流れることになり、フォトカプラPC
12は非導通となる。これによりOR13を介して出力
リレー不良として出力される。従って、平常時は遮断器
引き外し指令用継電器接点11a1(その指令を出力する
リレーも含む。)と、同接点12a1と、試験用端子TT
1や遮断器の引き外しコイルTCの回路とを確実に監視
することができる。更に、接点11a1および12a1の不
良(出力リレー不良)と試験用端子TT1や遮断器引き
外しコイルTCの回路の不良(引き外し回路不良)とを
識別して検出することができる。Therefore, when a disconnection occurs in the test terminal TT1, the trip coil TC of the circuit breaker, the a-contact TCa1 of the circuit breaker, or the wire connecting them, the current flowing in the trip coil TC is It flows through the photocoupler PC13 and the resistor R13. Then, current continues to flow in the photocouplers PC11 and PC12, the photocouplers PC11 and PC12 remain conductive, and no output relay failure is output. However, the photocoupler PC13 becomes conductive and is output as a tripping circuit failure via NOT13 and AND13. Further, by directly connecting the photocouplers PC11 and PC12 in parallel with the circuit breaker trip command relay contacts 11a1 and 12a1, the contacts are monitored. That is, for example, when the contact 12a1 is closed, the current that normally flows through the photocoupler PC12 will flow through the contact 12a1.
12 becomes non-conductive. As a result, an output relay failure is output via the OR13. Therefore, normally, the circuit breaker trip command relay contact 11a1 (including a relay that outputs the command), the contact 12a1, and the test terminal TT
1 and the circuit of the trip coil TC of the circuit breaker can be reliably monitored. Further, it is possible to distinguish and detect a defect of the contacts 11a1 and 12a1 (defective output relay) and a defect of the circuit of the test terminal TT1 and the breaker trip coil TC (defective trip circuit).
【0034】一方、保護継電装置の定期的な点検作業や
遮断器の点検作業を実施する場合は、点検時の不要な保
護継電装置動作出力を防止するため、試験用端子TT1
の短絡片を外している。このため試験用端子TT1側に
流れていた微小電流がフォトカプラPC13に流れて導
通となり、NOT13が成立するが、監視ロックにより
OR12,NOT14を介してAND13によって引き
外し回路不良出力をロックする。また遮断器が「開」の
場合も同様に、引き外し回路不良をロックする。しかし
ながら、この場合、フォトカプラPC11,PC12に
は、ひきつづきフォトカプラPC13を介して微小電流
が流れ導通となっている。このため、点検時引き外し回
路不良をロックしても、遮断器引き外し指令用継電器接
点11a1,12a1は継続して監視可能となる。つまり、
例えば接点11a1が閉路すると、フォトカプラPC11
を流れていた電流が接点11a1を介して流れることにな
り、フォトカプラPC11は非導通となる。これにより
OR13を介して出力リレー不良として出力される。On the other hand, when the inspection work of the protective relay device and the inspection work of the circuit breaker are carried out, in order to prevent unnecessary protective relay device operation output at the time of inspection, the test terminal TT1 is used.
The short-circuit piece of is removed. For this reason, the minute current flowing to the test terminal TT1 side flows to the photocoupler PC13 and becomes conductive, and the NOT13 is established. However, the trip circuit failure output is locked by the AND13 via the OR12 and NOT14 by the monitoring lock. Similarly, when the breaker is open, the trip circuit failure is locked. However, in this case, a minute current continues to flow through the photocouplers PC11 and PC12 via the photocoupler PC13 and is in conduction. Therefore, even if the trip circuit failure is locked during inspection, the circuit breaker trip command relay contacts 11a1 and 12a1 can be continuously monitored. That is,
For example, when the contact 11a1 is closed, the photocoupler PC11
The current flowing through the contact point 11a1 flows through the contact point 11a1, and the photocoupler PC11 becomes non-conductive. As a result, an output relay failure is output via the OR13.
【0035】図2は本発明の他の実施例である遮断器引
き外し用シールイン回路図である。同図に示すように、
本実施例が既に説明した図6の従来技術と相違する点
は、フォトカプラPC23、NOT回路NOT21,2
2,23、AND回路AND21、OR回路23及びラ
ンプL2を追加し、スイッチSW2を不要とした点であ
り、その他の点は同様であるので同一部分には同一符号
を付して説明する。FIG. 2 is a seal-in circuit diagram for tripping a circuit breaker according to another embodiment of the present invention. As shown in the figure,
This embodiment is different from the prior art shown in FIG. 6 which has already been described. The photo coupler PC23 and the NOT circuits NOT21 and NOT21.
2, 23, AND circuit AND21, OR circuit 23, and lamp L2 are added, and the switch SW2 is not necessary. The other points are the same, and the same parts are denoted by the same reference numerals.
【0036】すなわち、フォトカプラPC21及びPC
22の出力状態をNOT回路21,22を介し、AND
回路21にてシールイン継電器接点FX,MXのいずれ
かが閉路していないかを検出し、閉路していない場合、
ランプL2が表示することにより、従来、保護継電装置
の運用を再開する際に行っていた試験用端子のP側を試
験器で測定することがなくなり、試験用端子の短絡片を
接続することが可能となる。これにより保護継電装置の
運用を再開する際の作業時間を大幅に短縮することがで
きる。また、遮断器引き外し回路の断線監視は、フォト
カプラPC23とNOT回路23を追加するだけで図1
の実施例の作用と同様に断線監視を行うことができる。That is, the photocouplers PC21 and PC
The output state of 22 is ANDed through the NOT circuits 21 and 22.
In the circuit 21, it is detected whether one of the seal-in relay contacts FX and MX is closed, and when it is not closed,
By displaying the lamp L2, it is no longer necessary to measure the P side of the test terminal with the tester, which was conventionally performed when restarting the operation of the protective relay device, and connect the short-circuit piece of the test terminal. Is possible. As a result, the working time when the operation of the protective relay device is restarted can be greatly reduced. In addition, the circuit breaker trip circuit can be monitored for disconnection simply by adding the photo coupler PC23 and the NOT circuit 23.
The disconnection can be monitored in the same manner as the operation of the above embodiment.
【0037】また、本実施例においても、上記したよう
にフォトカプラPC23を追加したことにより、保護継
電装置や遮断器の点検時に試験用端子TT2の短絡片を
開放した場合や遮断器を「開」とした場合に、監視用の
電流が遮断されることなく流れるので、シールイン継電
器接点FX,MXの誤動作監視も継続できる。Also in the present embodiment, by adding the photocoupler PC23 as described above, when the short circuit piece of the test terminal TT2 is opened or the circuit breaker is opened when the protective relay or the circuit breaker is inspected. When it is set to “open”, the monitoring current flows without interruption, so that malfunction monitoring of the seal-in relay contacts FX and MX can be continued.
【0038】図3は本発明のさらに他の実施例である遮
断器投入回路図である。同図に示すように、本実施例が
既に説明した図7の従来技術と相違する点は、フォトカ
プラPC33、NOT回路NOT31,32,33、A
ND回路AND31、OR回路OR33及びランプL3
を追加し、スイッチSW3を不要とした点であり、その
他の点は同様であるので、同一部分には同一符号を付し
て説明する。FIG. 3 is a circuit diagram of a circuit breaker closing circuit which is still another embodiment of the present invention. As shown in the figure, the present embodiment is different from the prior art shown in FIG. 7 in that the photocoupler PC33, the NOT circuits NOT31, 32, 33, A
ND circuit AND31, OR circuit OR33 and lamp L3
Is added and the switch SW3 is unnecessary, and the other points are the same. Therefore, the same parts will be described with the same reference numerals.
【0039】すなわち、フォトカプラPC31及びPC
32の出力状態をNOT回路31,32を介し、AND
回路31にて継電器接点11a3,12a3のいずれかが閉
路していないかを検出し、閉路していない場合、ランプ
L3が表示することにより、従来、保護継電装置の運用
を再開する際に行っていた試験用端子のP側を試験器で
測定することがなくなり、試験用端子の短絡片を接続す
ることが可能となる。これにより保護継電装置の運用を
再開する際の作業時間を大幅に短縮することができる。
また、遮断器投入回路の断線監視は、フォトカプラPC
33とNOT回路33を追加するだけで図1の実施例の
作用と同様に断線監視を行うことができる。That is, the photocouplers PC31 and PC
The output state of 32 is ANDed through the NOT circuits 31 and 32.
The circuit 31 detects whether any one of the relay contacts 11a3 and 12a3 is not closed, and when not closed, the lamp L3 is displayed to conventionally perform the operation when restarting the operation of the protective relay device. It is no longer necessary to measure the P side of the test terminal with a tester, and it is possible to connect the short-circuit piece of the test terminal. As a result, the working time when the operation of the protective relay device is restarted can be greatly reduced.
Also, the breaker closing circuit is monitored for disconnection by a photocoupler PC.
Just by adding 33 and the NOT circuit 33, disconnection monitoring can be performed similarly to the operation of the embodiment of FIG.
【0040】また、本実施例においても、上記したよう
にフォトカプラPC33を追加したことにより、保護継
電装置や遮断器の点検時に試験用端子TT3の短絡片を
開放した場合や遮断器を「開」とした場合に、監視用の
電流が遮断されることなく流れるので、継電器接点11
a3,12a3の誤動作監視も継続できる。Also in this embodiment, by adding the photocoupler PC33 as described above, when the short circuit piece of the test terminal TT3 is opened or the circuit breaker is opened when the protective relay or the circuit breaker is inspected. When it is set to “open”, the monitoring current flows without interruption, so the relay contact 11
Malfunction monitoring of a3 and 12a3 can be continued.
【0041】尚、上記各実施例において、試験用端子T
T1〜TT3は人間系で開路するものとしているが、点
検指令により自動的に開路する試験用端子(接点)とし
ても良い。また、継電器接点はサイリスタなどの静止形
接点としても良い。また、フォトカプラPC13,PC
23,PC33をなくし、抵抗R13,R23,R33
により試験時微小電流をバイパスさせるバイパス回路と
しても良い。In each of the above embodiments, the test terminal T
Although T1 to TT3 are supposed to be opened by a human system, they may be test terminals (contacts) that are automatically opened according to an inspection command. Further, the relay contact may be a static contact such as a thyristor. Also, photo couplers PC13, PC
23 and PC33 are eliminated, and resistors R13, R23 and R33 are eliminated.
Therefore, a bypass circuit that bypasses a minute current during a test may be used.
【0042】[0042]
【発明の効果】以上説明したように、本発明によれば、
保護継電装置の点検時や遮断器の点検時においても、遮
断器の引き外しコイルや投入コイルと並列に監視回路を
追加することで、遮断器引き外し回路や遮断器投入回路
の監視をロックする必要なく、継続的に監視することが
可能になり早期に不良検出ができる。また引き外しコイ
ルや投入コイルと並列に監視回路を追加することで、遮
断器引き外し回路や遮断器投入回路の試験用端子の短絡
片を接続する際、その都度試験器で電位の測定の必要性
がなく、作業時間の大幅な短縮が可能である。As described above, according to the present invention,
Locking the circuit breaker trip circuit and circuit breaker closing circuit by adding a monitoring circuit in parallel with the circuit breaker trip coil and closing coil even when inspecting the protective relay and circuit breaker. It is possible to continuously monitor without needing to do so and to detect defects early. In addition, by adding a monitoring circuit in parallel with the trip coil and the closing coil, it is necessary to measure the potential with the tester each time when connecting the shorting piece of the test terminal of the circuit breaker trip circuit or the circuit breaker closing circuit. There is no effect, and the work time can be greatly shortened.
【図1】本発明の第1実施例の回路図。FIG. 1 is a circuit diagram of a first embodiment of the present invention.
【図2】本発明の第2実施例の回路図。FIG. 2 is a circuit diagram of a second embodiment of the present invention.
【図3】本発明の第3実施例の回路図。FIG. 3 is a circuit diagram of a third embodiment of the present invention.
【図4】本発明の手順を示すフローチャート。FIG. 4 is a flowchart showing the procedure of the present invention.
【図5】従来装置の回路図。FIG. 5 is a circuit diagram of a conventional device.
【図6】従来装置の他の回路図。FIG. 6 is another circuit diagram of the conventional device.
【図7】従来装置のさらに他の回路図。FIG. 7 is still another circuit diagram of the conventional device.
【図8】従来装置の手順を示すフローチャート。FIG. 8 is a flowchart showing a procedure of a conventional device.
11a1,11a2,12a1,12a2…遮断器引き外し用継
電器接点、L1,L2,L3…ランプ、PC11,PC
12,PC13,PC21,PC22,PC23,PC
31,PC32,PC33…フォトカプラ、SW1,S
W2,SW3…スイッチ、TT1,TT2,TT3…試
験用端子、TC…遮断器の引き外しコイル、TCa1,T
Ca2…遮断器の引き外しコイルのa接点、X,Y…シー
ルイン継電器、FX,MX…シールイン継電器の接点。11a1, 11a2, 12a1, 12a2 ... Relay contacts for breaker tripping, L1, L2, L3 ... Lamp, PC11, PC
12, PC13, PC21, PC22, PC23, PC
31, PC32, PC33 ... Photo coupler, SW1, S
W2, SW3 ... Switch, TT1, TT2, TT3 ... Test terminal, TC ... Breaker trip coil, TCa1, T
Ca2 ... A contact of trip coil of breaker, X, Y ... Seal-in relay, FX, MX ... Contact of seal-in relay.
Claims (6)
を与えるとき閉路する第1の継電器接点および第2の継
電器接点と、当該保護継電装置の試験の時に開路される
試験用端子と、前記遮断器の引き外しコイルあるいは投
入コイルとが直列に接続された遮断器引き外し回路ある
いは遮断器投入回路を備える保護継電装置の監視回路に
おいて、前記第1の継電器接点と並列に接続され該第1
の継電器接点の動作状態を常時監視する第1の監視回路
と、前記第2の継電器接点と並列に接続され該第2の継
電器接点の動作状態を常時監視する第2の監視回路と、
前記試験用端子および前記引き外しコイルあるいは投入
コイルの直列回路と並列に接続され該試験用端子および
前記引き外しコイルあるいは投入コイルの直列回路を平
常時監視し、当該保護継電装置の試験の時ロックされる
第3の監視回路とを具備することを特徴とする保護継電
装置の監視回路。1. A first relay contact and a second relay contact which are closed when a trip command or a closing command is given to a circuit breaker, and a test terminal which is opened at the time of a test of the protective relay device, In a monitoring circuit of a protective relay device including a circuit breaker trip circuit or a circuit breaker closing circuit in which a trip coil or a closing coil of a circuit breaker is connected in series, the monitoring circuit of the protective relay device is connected in parallel with the first relay contact. 1
A first monitoring circuit that constantly monitors the operating state of the relay contact; and a second monitoring circuit that is connected in parallel with the second relay contact and that constantly monitors the operating state of the second relay contact.
When the test terminal and the trip coil or the closing coil are connected in parallel with the series circuit, the test terminal and the trip coil or the closing coil series circuit are constantly monitored to test the protective relay device. And a third monitoring circuit that is locked, the monitoring circuit of the protective relay device.
いて、前記第1の監視回路、第2の監視回路および第3
の監視回路をフォトカプラとすることを特徴とする保護
継電装置の監視回路。2. The monitoring circuit of the protective relay device according to claim 1, wherein the first monitoring circuit, the second monitoring circuit, and the third monitoring circuit.
The monitoring circuit of the protective relay device, wherein the monitoring circuit of is a photocoupler.
を与えるとき閉路する第1の継電器接点および第2の継
電器接点と、当該保護継電装置の試験の時に開路される
試験用端子と、前記遮断器の引き外しコイルあるいは投
入コイルとが直列に接続された遮断器引き外し回路ある
いは遮断器投入回路を備える保護継電装置の監視回路に
おいて、前記第1の継電器接点と並列に接続され、前記
引き外しコイルあるいは投入コイルが動作しない微小電
流が流れているか否かにより該第1の継電器接点の動作
状態を常時監視する第1の監視回路と、前記第2の継電
器接点と並列に接続され、前記微小電流が流れているか
否かにより該第2の継電器接点の動作状態を常時監視す
る第2の監視回路と、前記試験用端子および前記引き外
しコイルあるいは投入コイルの直列回路と並列に接続さ
れ、前記試験用端子が開路されたとき前記微小電流をバ
イパスさせるバイパル回路とを具備することを特徴とす
る保護継電装置の監視回路。3. A first relay contact and a second relay contact which are closed when a trip command or a closing command is given to the circuit breaker, and a test terminal which is opened during a test of the protective relay device. In a monitoring circuit of a protective relay device comprising a circuit breaker trip circuit or circuit breaker closing circuit in which a trip coil or a closing coil of a circuit breaker is connected in series, the monitoring circuit is connected in parallel with the first relay contact, and A first monitoring circuit that constantly monitors the operating state of the first relay contact depending on whether or not a minute current that does not operate the trip coil or the closing coil is flowing, and is connected in parallel with the second relay contact, A second monitoring circuit that constantly monitors the operating state of the second relay contact depending on whether or not the minute current flows, the test terminal and the trip coil, or the throwing coil. A monitoring circuit of a protective relay device, comprising: a parallel circuit connected to a series circuit of an input coil, the bypass circuit bypassing the minute current when the test terminal is opened.
を与えるとき閉路する第1の継電器接点および第2の継
電器接点と、当該保護継電装置の試験の時に開路される
試験用端子と、前記遮断器の引き外しコイルあるいは投
入コイルとが直列に接続された遮断器引き外し回路ある
いは遮断器投入回路を備える保護継電装置の監視回路に
おいて、前記第1の継電器接点と並列に接続され該第1
の継電器接点の動作状態を常時監視する第1の監視回路
と、前記第2の継電器接点と並列に接続され該第2の継
電器接点の動作状態を常時監視する第2の監視回路と、
前記第1の監視回路および前記第2の監視回路がともに
各継電器接点の開路状態を検出しているとき表示出力す
る表示回路とを具備することを特徴とする保護継電装置
の監視回路。4. A first relay contact and a second relay contact which are closed when a trip command or a closing command is given to the circuit breaker, and a test terminal which is opened during a test of the protective relay device. In a monitoring circuit of a protective relay device including a circuit breaker trip circuit or a circuit breaker closing circuit in which a trip coil or a closing coil of a circuit breaker is connected in series, the monitoring circuit of the protective relay device is connected in parallel with the first relay contact. 1
A first monitoring circuit that constantly monitors the operating state of the relay contact; and a second monitoring circuit that is connected in parallel with the second relay contact and that constantly monitors the operating state of the second relay contact.
A monitoring circuit for a protective relay device, comprising: a display circuit that outputs an output when both the first monitoring circuit and the second monitoring circuit detect the open state of each relay contact.
動作させるシールイン継電器と、前記シールイン継電器
が動作したとき閉路するシールイン継電器接点と、当該
保護継電装置の試験の時に開路される試験用端子とが直
列に接続されたシールイン回路を備える保護継電装置の
監視回路において、前記シールイン継電器接点と並列に
接続され該シールイン継電器接点の動作状態を常時監視
する第1の監視回路と、前記試験用端子および前記シー
ルイン継電器の直列回路と並列に接続され該試験用端子
および前記シールイン継電器の直列回路を平常時監視
し、当該保護継電装置の試験の時ロックされる第2の監
視回路とを具備することを特徴とする保護継電装置の監
視回路。5. A seal-in relay that is operated when an opening command or a closing command is given, a seal-in relay contact that is closed when the seal-in relay operates, and a test that is opened at the time of testing the protective relay device. In a monitoring circuit of a protective relay device including a seal-in circuit in which terminals are connected in series, a first monitoring circuit connected in parallel with the seal-in relay contact and constantly monitoring an operating state of the seal-in relay contact, A second terminal connected in parallel with a series circuit of the test terminal and the seal-in relay to monitor the test terminal and the series circuit of the seal-in relay in a normal state, and locked during a test of the protective relay device; And a monitoring circuit for the protection relay device.
動作させるシールイン継電器と、前記シールイン継電器
が動作したとき閉路するシールイン継電器接点と、当該
保護継電装置の試験の時に開路される試験用端子とが直
列に接続されたシールイン回路を備える保護継電装置の
監視回路において、前記シールイン継電器接点と並列に
接続され該シールイン継電器接点の動作状態を常時監視
する監視回路と、前記監視回路がシールイン継電器接点
の開路状態を検出しているとき表示出力する表示回路と
を具備することを特徴とする保護継電装置の監視回路。6. A seal-in relay which is operated when an opening command or a closing command is given, a seal-in relay contact which is closed when the seal-in relay is operated, and a test which is opened when the protective relay is tested. In a monitoring circuit of a protective relay device having a seal-in circuit in which terminals are connected in series, a monitoring circuit connected in parallel with the seal-in relay contact and constantly monitoring the operating state of the seal-in relay contact, and the monitoring circuit. A monitoring circuit for a protective relay device, comprising: a display circuit that outputs an output when the circuit detects an open state of a seal-in relay contact.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17203995A JP3383128B2 (en) | 1995-07-07 | 1995-07-07 | Monitoring circuit for protective relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17203995A JP3383128B2 (en) | 1995-07-07 | 1995-07-07 | Monitoring circuit for protective relay |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0923565A true JPH0923565A (en) | 1997-01-21 |
JP3383128B2 JP3383128B2 (en) | 2003-03-04 |
Family
ID=15934401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17203995A Expired - Lifetime JP3383128B2 (en) | 1995-07-07 | 1995-07-07 | Monitoring circuit for protective relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3383128B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001338555A (en) * | 2000-05-26 | 2001-12-07 | Mitsubishi Electric Corp | Control circuit for circuit breaker |
KR100375066B1 (en) * | 2001-04-19 | 2003-03-07 | 엘지산전 주식회사 | Vital contact monitoring apparatus of relay |
CN110426595A (en) * | 2019-09-04 | 2019-11-08 | 沈阳汇鼎润达科技有限公司 | One secondary circuit failure detection device of ring-main unit |
CN111934291A (en) * | 2020-07-21 | 2020-11-13 | 广东电网有限责任公司 | Method for judging circuit breaker tripping due to stealing and electrical tripping |
CN115112970A (en) * | 2022-05-27 | 2022-09-27 | 国网江苏省电力有限公司南通供电分公司 | Method and system for monitoring state of pressure plate at outlet of relay protection operation loop |
CN116840740A (en) * | 2023-08-25 | 2023-10-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
-
1995
- 1995-07-07 JP JP17203995A patent/JP3383128B2/en not_active Expired - Lifetime
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001338555A (en) * | 2000-05-26 | 2001-12-07 | Mitsubishi Electric Corp | Control circuit for circuit breaker |
JP4575550B2 (en) * | 2000-05-26 | 2010-11-04 | 三菱電機株式会社 | Circuit breaker control circuit |
KR100375066B1 (en) * | 2001-04-19 | 2003-03-07 | 엘지산전 주식회사 | Vital contact monitoring apparatus of relay |
CN110426595A (en) * | 2019-09-04 | 2019-11-08 | 沈阳汇鼎润达科技有限公司 | One secondary circuit failure detection device of ring-main unit |
CN110426595B (en) * | 2019-09-04 | 2024-03-29 | 沈阳汇鼎润达科技有限公司 | Ring network unit primary and secondary loop fault detection device |
CN111934291A (en) * | 2020-07-21 | 2020-11-13 | 广东电网有限责任公司 | Method for judging circuit breaker tripping due to stealing and electrical tripping |
CN111934291B (en) * | 2020-07-21 | 2022-07-26 | 广东电网有限责任公司 | Method for judging circuit breaker tripping due to stealing and electrical tripping |
CN115112970A (en) * | 2022-05-27 | 2022-09-27 | 国网江苏省电力有限公司南通供电分公司 | Method and system for monitoring state of pressure plate at outlet of relay protection operation loop |
CN115112970B (en) * | 2022-05-27 | 2023-12-22 | 国网江苏省电力有限公司南通供电分公司 | Method and system for monitoring state of outlet pressing plate of relay protection operation loop |
CN116840740A (en) * | 2023-08-25 | 2023-10-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
CN116840740B (en) * | 2023-08-25 | 2023-11-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
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