JPH0750718Y2 - Electromagnetically operated switchgear operating time measuring device - Google Patents
Electromagnetically operated switchgear operating time measuring deviceInfo
- Publication number
- JPH0750718Y2 JPH0750718Y2 JP1989131984U JP13198489U JPH0750718Y2 JP H0750718 Y2 JPH0750718 Y2 JP H0750718Y2 JP 1989131984 U JP1989131984 U JP 1989131984U JP 13198489 U JP13198489 U JP 13198489U JP H0750718 Y2 JPH0750718 Y2 JP H0750718Y2
- Authority
- JP
- Japan
- Prior art keywords
- control current
- measuring device
- closing
- circuit
- time
- 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.)
- Expired - Lifetime
Links
Landscapes
- Measurement Of Unknown Time Intervals (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Keying Circuit Devices (AREA)
Description
【考案の詳細な説明】 （ａ） 産業上の利用分野 この考案は、しゃ断器などの電磁操作式開閉装置におい
て、投入／しゃ断制御電流を検出することによってその
動作時間を計測する装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to an electromagnetically operated switchgear such as a circuit breaker which measures its operating time by detecting a closing / blocking control current.
（ｂ） 従来の技術 予測保全の見地から、しゃ断器などの電磁操作式開閉装
置の動作時間を常時監視するようにしたものがある。こ
の種の従来の動作時間計測装置では、投入／しゃ断制御
電流回路に流れる電流を検出するセンサとしてホール素
子型のDC/CT（直流用CT）やロゴウスキーコイルを使用
したもの、またはその電流回路にシャント抵抗を挿入し
たものなどがあった。(B) Conventional technology From the viewpoint of predictive maintenance, there is one in which the operation time of an electromagnetically operated switchgear such as a circuit breaker is constantly monitored. In this type of conventional operating time measuring device, a Hall element type DC / CT (DC for CT) or Rogowski coil is used as a sensor for detecting the current flowing in the closing / blocking control current circuit, or its current There were things such as inserting a shunt resistor in the circuit.
DC/CTは上記制御電流回路に流れる直流電流をそのまま
検出するものであり、これを用いた計測装置の回路構成
は、例えば第３図に示すようになっている。同図で、１
は投入制御電流回路であり、２はしゃ断制御電流回路で
ある。例えばしゃ断指令が入ると接点SW2が導通してし
ゃ断制御電流が流れ、電磁コイル52Tが作動する。しゃ
断動作が完了すると、接点SW2が開く。DC/CTは上記のよ
うにして接点SW2が閉じてから開くまでの間、すなわち
直流電流が流れている時間Ｔの間“H"となるパルスを発
生し、計測部４に出力する。計測部４では比較器40と基
準値を出す設定器41とによってDC/CT3の出力からノイズ
分などを除去して、時間計測部42に渡す。時間計測部42
では上記時間Ｔを計測して表示部43に出力するととも
に、アナログ信号として外部端子44から外部に出力す
る。さらに、比較器45で基準値46と比較して時間Ｔが一
定以上であれば、アラーム出力回路47で警報出力する。The DC / CT detects the direct current flowing through the control current circuit as it is, and the circuit configuration of the measuring device using this is as shown in FIG. 3, for example. In the figure, 1
Is a closing control current circuit, and 2 is a breaking control current circuit. For example, when a cutoff command is input, the contact SW2 becomes conductive, a cutoff control current flows, and the electromagnetic coil 52T operates. When the breaking operation is completed, the contact SW2 opens. As described above, the DC / CT generates a pulse that becomes "H" from the time when the contact SW2 is closed to the time when the contact SW2 is opened, that is, the time T during which the direct current is flowing, and outputs the pulse to the measuring unit 4. In the measuring unit 4, the comparator 40 and the setting unit 41 that outputs the reference value remove noise components and the like from the output of the DC / CT 3, and pass the result to the time measuring unit 42. Time measurement unit 42
Then, the time T is measured and output to the display unit 43 and also output as an analog signal from the external terminal 44 to the outside. Further, the comparator 45 compares it with the reference value 46, and if the time T is equal to or longer than a certain value, the alarm output circuit 47 outputs an alarm.
センサとしては、上記のようなDC/CTに代えてロゴウス
キーコイルを使用することも可能である。A Rogowski coil may be used as the sensor instead of the DC / CT as described above.
また、上記の制御電流回路にシャント抵抗を挿入したも
のでは、このシャント抵抗の両端電圧を監視しておき、
電圧が発生した状態を検出することによって上記動作時
間を計測するようにしている。Also, in the case where a shunt resistor is inserted in the above control current circuit, the voltage across this shunt resistor is monitored,
The operating time is measured by detecting the state in which a voltage is generated.
（ｃ） 考案が解決しようとする課題 しかし、DC/CTやロゴウスキーコイルを使用するもので
は、センサが非常に高価格になる問題があった。また、
シャント抵抗を使用する装置では測定系とシャント抵抗
とを絶縁するために絶縁アンプが必要となり、その分高
価格になるとともに、構成が複雑になる問題があった。(C) Problems to be solved by the invention However, in the case of using DC / CT or Rogowski coil, there is a problem that the sensor becomes very expensive. Also,
An apparatus using a shunt resistor requires an isolation amplifier to insulate the measurement system and the shunt resistor, resulting in a high price and a complicated configuration.
この考案の目的は、交流用CTによって直流電流が流れ始
めるときの立ち上がりタイミングを検出することにより
上記の問題を解決することのできる動作時間計測装置を
提供することにある。An object of the present invention is to provide an operating time measuring device capable of solving the above problem by detecting the rising timing when a direct current starts to flow by an AC CT.
（ｄ） 課題を解決するための手段 この考案は、電磁操作式開閉装置の投入／しゃ断直流制
御電流回路に設けた交流用CTと、 前記開閉装置の投入／しゃ断時に作動する補助接点と、 前記交流用CTの一次側に流れる投入／しゃ断直流制御電
流により該CTの二次側に生じる出力立ち上がり時から前
記補助接点作動時までの時間を計測する計測部と、 を備えてなることを特徴とする。(D) Means for Solving the Problems The present invention is directed to an AC CT provided in a closing / cutting DC control current circuit of an electromagnetically operated switchgear, an auxiliary contact that operates when the switchgear is turned on / off, and A measuring unit for measuring the time from the rise of the output generated on the secondary side of the CT by the closing / blocking DC control current flowing in the primary side of the AC CT to the operation of the auxiliary contact, To do.
（ｅ） 作用 この考案では、投入／しゃ断直流制御電流回路に設けた
交流用CTにより、投入／しゃ断時の直流制御電流の立ち
上がり時の変化を検出する。そして、その変化の検出信
号で計測部をトリガする。さらに、開閉装置に通常設け
られている補助接点からの信号によって開閉装置の動作
完了時点で上記計測部の計測動作を終わらせる。このよ
うな構成によると、確実に制御電流の立ち上がりタイミ
ングを検出できるために高精度な動作時間計測を行うこ
とができるとともに、交流用CTは一般に安価であるか
ら、装置が安価かつ構成が簡単になる。(E) Function In this invention, the change in the rising of the DC control current at the time of making / cutting is detected by the AC CT provided in the making / cutting DC control current circuit. Then, the measuring unit is triggered by the detection signal of the change. Furthermore, the measurement operation of the measuring unit is terminated when the operation of the switchgear is completed by a signal from an auxiliary contact normally provided in the switchgear. According to such a configuration, since the rising timing of the control current can be reliably detected, highly accurate operation time measurement can be performed, and since the AC CT is generally inexpensive, the device is inexpensive and the configuration is simple. Become.
（ｆ） 実施例 第１図はこの考案の実施例の回路図を示している。(F) Embodiment FIG. 1 shows a circuit diagram of an embodiment of the present invention.
図に示すように、本実施例ではセンサとして交流用CT
（AC/CT）５を用い、この検出信号を比較器40に入力し
ている。なお、AC/CT5と比較器40との間に直流残留除去
回路48を設けている。この回路48は、AC/CT5を直流回路
に使用した場合CTに直流残留磁界が残るので、直流電源
48aと抵抗48bとによってAC/CT5に対し逆バイアス電流を
流し、上記磁界を消磁するためのものである。第２図は
制御電流波形とAC/CT出力波形を示している。図に示す
ように、AC/CT出力は制御電流の微分波形となってい
る。比較器40の後段にはフリップフロップ49が接続さ
れ、比較器40の出力が“H"になったときにセットされ
る。また、このフリップフロップ49のクリア端子には投
入状変検出部50またはしゃ断状変検出部51からの検出信
号が導かれ、各検出部50,51にはしゃ断器の補助接点52
a,52bがそれぞれ接続されている。すなわち、上記フッ
プフロップ49は制御電流の立ち上がり時にセットし、し
ゃ断器主回路の接点が実際に投入されたとき（投入状変
検出部50が“H"の信号を出す）、またはしゃ断されたと
き（しゃ断状変検出部51の出力が“H"となる）にリセッ
トされる。As shown in the figure, in this embodiment, a CT for AC is used as a sensor.
This detection signal is input to the comparator 40 using (AC / CT) 5. A DC residual elimination circuit 48 is provided between the AC / CT 5 and the comparator 40. This circuit 48 uses a DC power supply because the DC residual magnetic field remains in the CT when AC / CT5 is used in a DC circuit.
A reverse bias current is applied to AC / CT5 by means of 48a and a resistor 48b to degauss the magnetic field. Figure 2 shows the control current waveform and the AC / CT output waveform. As shown in the figure, the AC / CT output is a differential waveform of the control current. A flip-flop 49 is connected to the subsequent stage of the comparator 40 and is set when the output of the comparator 40 becomes "H". Further, a detection signal from the closing state change detecting unit 50 or the breaking state change detecting unit 51 is introduced to the clear terminal of the flip-flop 49, and the auxiliary contact 52 of the breaker is connected to each detecting unit 50, 51.
a and 52b are respectively connected. That is, the hoop flop 49 is set at the rising of the control current, and when the contact of the circuit breaker main circuit is actually closed (the closing state change detection unit 50 outputs a "H" signal) or when the circuit is cut off. It is reset to (the output of the interruption state change detection unit 51 becomes “H”).
上記の動作によってフリップフロップ49のセット出力端
子にはしゃ断器の動作時間Ｔの長さを持つパルスが現
れ、時間計測部42によってこの時間Ｔが計測される。By the above operation, a pulse having the length of the operation time T of the breaker appears at the set output terminal of the flip-flop 49, and the time measuring unit 42 measures this time T.
計測された時間は表示部43で表示され、またアナログ信
号として外部に出力され、さらに時間Ｔが一定値を越え
ている場合には比較器45によってその状態が検出され外
部にアラーム出力される。The measured time is displayed on the display unit 43 and is output to the outside as an analog signal. Further, when the time T exceeds a certain value, the state is detected by the comparator 45 and an alarm is output to the outside.
なお、上記の回路においてAC/CT5と比較器40の間に絶縁
性をさらに高めるためのフォトカプラを挿入しても良
い。In the above circuit, a photocoupler may be inserted between the AC / CT 5 and the comparator 40 to further enhance insulation.
（ｇ） 考案の効果 この考案によれば、高価なDC/CTや絶縁アンプなどを使
用する必要がないために、低コストでかつ絶縁上も何ら
問題のない計測を正確に行うことができる。(G) Effect of the Invention According to this invention, since it is not necessary to use an expensive DC / CT, an isolation amplifier, or the like, it is possible to accurately perform measurement at low cost and with no problem in insulation.
第１図はこの考案の実施例の回路図を示し、第２図は制
御電流とAC/CTの出力波形を示す図であり、第３図は従
来の計測装置の回路図を示している。 4,4′……計測部、５……AC/CT（交流用CT）、52a,52b
……補助接点。FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a diagram showing control current and AC / CT output waveforms, and FIG. 3 is a circuit diagram of a conventional measuring device. 4,4 ′ …… Measuring section, 5 …… AC / CT (CT for AC), 52a, 52b
...... Auxiliary contact.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０１Ｒ 31/333 Ｈ０１Ｈ 9/54 Ｃ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location G01R 31/333 H01H 9/54 C
Claims (1)
御電流回路に設けた交流用CTと、 前記開閉装置の投入／しゃ断時に作動する補助接点と、 前記交流用CTの一次側に流れる投入／しゃ断直流制御電
流により該CTの二次側に生じる出力立ち上がり時から前
記補助接点作動時までの時間を計測する計測部と、 を備えてなる、電磁操作式開閉装置の動作時間計測装
置。1. An AC CT provided in a closing / cutting DC control current circuit of an electromagnetically-operated switchgear, an auxiliary contact that operates when closing / closing the switchgear, and a closing flow that flows to the primary side of the AC CT. / An operation time measuring device for an electromagnetically-operated switchgear, comprising: a measuring unit for measuring a time from a rise of an output generated on the secondary side of the CT due to a cutoff DC control current until the auxiliary contact is activated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989131984U JPH0750718Y2 (en) | 1989-11-13 | 1989-11-13 | Electromagnetically operated switchgear operating time measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989131984U JPH0750718Y2 (en) | 1989-11-13 | 1989-11-13 | Electromagnetically operated switchgear operating time measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0370395U JPH0370395U (en) | 1991-07-15 |
| JPH0750718Y2 true JPH0750718Y2 (en) | 1995-11-15 |
Family
ID=31679462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989131984U Expired - Lifetime JPH0750718Y2 (en) | 1989-11-13 | 1989-11-13 | Electromagnetically operated switchgear operating time measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0750718Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5727239B2 (en) * | 2011-01-17 | 2015-06-03 | 中国電力株式会社 | Circuit breaker test apparatus, program, and circuit breaker test method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814628B2 (en) * | 1975-09-30 | 1983-03-19 | 横河電機株式会社 | RELENO |
| JPS61108980A (en) * | 1984-11-01 | 1986-05-27 | Mitsubishi Electric Corp | Signal current waveform detector |
-
1989
- 1989-11-13 JP JP1989131984U patent/JPH0750718Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0370395U (en) | 1991-07-15 |
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