JP3085294U - Contact monitoring circuit for protective relay - Google Patents
Contact monitoring circuit for protective relayInfo
- Publication number
- JP3085294U JP3085294U JP2001006624U JP2001006624U JP3085294U JP 3085294 U JP3085294 U JP 3085294U JP 2001006624 U JP2001006624 U JP 2001006624U JP 2001006624 U JP2001006624 U JP 2001006624U JP 3085294 U JP3085294 U JP 3085294U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- relay
- monitoring circuit
- photocoupler
- contact
- 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 - Fee Related
Links
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- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】
【課題】 電力設備の保護継電装置のリレー不良によっ
てリレー接点閉路の状態となった時に警報表示し、送電
線または配電線事故時の誤選択遮断を未然防止する。
【解決手段】直流電源ＰＮ間に抵抗器を２つ直列に入れ
その中点を監視しようとする回路にフォトカプラを介し
て接続し、不良となった接点回路との電位差を検出し、
警報表示する。
(57) [Summary] PROBLEM TO BE SOLVED: To provide an alarm display when a relay contact is closed due to a relay failure of a protection relay device of electric power equipment, thereby preventing erroneous selection interruption in a transmission line or distribution line accident. SOLUTION: Two resistors are connected in series between a DC power supply PN and connected via a photocoupler to a circuit whose middle point is to be monitored, and a potential difference from a defective contact circuit is detected.
Display an alarm.
Description
【０００１】[0001]
【考案の属する技術分野】 本考案は、電力設備におけるメカ形保護継電装置 のトリップ回路を形成するリレーの接点の状態を監視するための、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 protection relay monitoring circuit for monitoring a state of a contact of a relay forming a trip circuit of a mechanical protection relay in power equipment.
【０００２】[0002]
【従来の技術】 （図１）に示すメカ形保護継電装置における保護継電装置の トリップ回路構成において、事故検出リレー接点、主検出リレー接点の状態を監 視する回路がなく、誤動作時の即時発見が困難である。2. Description of the Related Art In a trip circuit configuration of a protection relay device in a mechanical protection relay device shown in FIG. 1 (FIG. 1), there is no circuit for monitoring the status of an accident detection relay contact and a main detection relay contact. Difficult to find immediately.
【０００３】[0003]
【考案が解決しようとする課題】 事故検出リレー,主検出リレーは従来より内 部 の部品にトランジスタ、コンデンサなどの電子部品を多用し、経年変化、周囲の ノイズ、温度変化、接点のウィスカー現象発生などによる誤動作が考えられ、誤 動作が点検時まで発見できない。[Problems to be solved by the invention] The accident detection relay and the main detection relay have traditionally used electronic components such as transistors and capacitors as internal components, causing aging, ambient noise, temperature changes, and contact whisker phenomena. A malfunction may be caused by such factors, and the malfunction cannot be detected until the inspection.
【０００４】 誤動作の状態にあるとき系統に事故が発生すると停電範囲の拡大を招くことに なるので、不良箇所をを早期発見出来るよう設備の信頼度を向上させる。If an accident occurs in the system when the system is in a malfunctioning state, the range of the power outage will be expanded. Therefore, the reliability of the facility is improved so that a defective portion can be found early.
【０００５】[0005]
【課題を解決するための手段】 （図３）は上記課題を解決するために、保護 継電装置に本考案の監視回路（図２）を設置し、事故検出リレーＳＲyが長時間 接点閉路するとトリップ構成回路のＰ→ＳＲy接点→Ｒ３→Ｄ３→フォトカプラ ＰＣ３→フォトカプラＰＣ１→Ｄ１→Ｒ２→Ｎへ電流が流れ、フォトカプラＰＣ ３とフォトカプラＰＣ１がオンとなりリレーＰＸを動作させ警報する。[Means for Solving the Problems] (FIG. 3) In order to solve the above problems, the monitoring circuit of the present invention (FIG. 2) is installed in the protective relay, and when the accident detection relay SRy is closed for a long time, the contact is closed. A current flows through the trip configuration circuit P → SRy contact → R3 → D3 → photocoupler PC3 → photocoupler PC1 → D1 → R2 → N, photocoupler PC3 and photocoupler PC1 turn on, relay PX is activated, and an alarm is issued.
【０００６】 主検出リレーＭＲyが長時間接点閉路すると監視リレーのＰ→Ｒ１→Ｄ２→フ ォトカプラＰＣ２→フォトカプラＰＣ３→Ｄ４→Ｒ３→ＭＲｙ接点→ＴＣ→５２ ａ→トリップ構成回路Ｎへ電流が流れ、フォトカプラＰＣ２とフォトカプラＰＣ ３がオンとなりリレーＮＸを動作させ警報する。When the main detection relay MRy closes the contact for a long time, current flows to the monitoring relay P → R1 → D2 → photocoupler PC2 → photocoupler PC3 → D4 → R3 → MRy contact → TC → 52a → trip configuration circuit N , The photocoupler PC2 and the photocoupler PC3 are turned on, and the relay NX is operated to issue an alarm.
【０００７】 なお、前項[0007] The preceding paragraph
【０００８】およびAnd
【０００９】において既設回路へ通電される電 流は遮断器のトリップ電流２Ａ以上に対し、１ミリアンペア以下で非常に小さく 遮断器を誤作動させることはない。In this case, the current supplied to the existing circuit is very small, not more than 1 mA, with respect to the trip current of 2 A or more of the circuit breaker, so that the circuit breaker does not malfunction.
【００１０】[0010]
【考案の実施の形態】考案の実施の形態について図面を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.
【００１１】 本考案の監視回路の（図２）ではフォトカプラＰＣ１、ＰＣ２、ＰＣ３には常 時電流が流れておらず、動作感度を設定する上でロジック用電源装置を必要とせ ず、従って部品点数も少なく構成でき、既設の保護継電値装置の空きスペースに 追加設置できる。In the monitoring circuit of the present invention (FIG. 2), no current always flows through the photocouplers PC1, PC2, and PC3, and a logic power supply device is not required for setting the operation sensitivity. It can be configured with a small number of points and can be additionally installed in the empty space of the existing protective relay device.
【００１２】 さらに、（図２）の如くフォトカプラＰＣ１とフォトカプラＰＣ３のアンド条件 でＰ電圧検出、フォトカプラＰＣ２とフォトカプラＰＣ３のアンド条件でＮ電圧 検出の回路構成とする事によりこの回路の信頼度を高める。Further, as shown in FIG. 2, the circuit configuration is such that the P voltage is detected by the AND condition of the photocouplers PC1 and PC3 and the N voltage is detected by the AND condition of the photocouplers PC2 and PC3. Increase confidence.
【００１３】 保護継電装置の不良箇所の発見機会はディジタル形保護継電装置以外では定期 点検時まで困難だが、本考案を既設の保護継電装置に取り付けることにより不良 発生直後に警報し、早期発見することが可能となる。[0013] It is difficult to find a defective part of the protection relay until a periodic inspection is performed except for the digital protection relay, but by attaching the present invention to an existing protection relay, an alarm is issued immediately after the occurrence of the failure, and an early warning is issued. It becomes possible to discover.
【００１４】 （図４）は配電用変電所の配電線地絡保護回路に本考案の監視回路を取り付け た例を示す。同図では事故検出リレーの補助リレー（１６４ＶＢＴＸ）と各配電 線の地絡方向継電器（１６７Ｂ１、１６７Ｂ２、１６７Ｂ３）の間のＤＧブスに 本考案の監視回路を接続し、タイマの時間設定を２０秒とすることにより、地絡 方向継電器のどれか１台が誤動作すると本考案の監視回路のＰＣ２、ＰＣ３がオ ンし２０秒後警報出力します。FIG. 4 shows an example in which the monitoring circuit of the present invention is attached to a distribution line ground fault protection circuit of a distribution substation. In the figure, the monitoring circuit of the present invention is connected to the DG bus between the auxiliary relay (164VBTX) of the fault detection relay and the ground fault direction relay (167B1, 167B2, 167B3) of each distribution line, and the time setting of the timer is set to 20 seconds. Therefore, if any one of the ground fault directional relays malfunctions, PC2 and PC3 of the monitoring circuit of the present invention are turned on and an alarm is output after 20 seconds.
【００１５】 また、１６４ＶＢＴＸの接点が導通状態に陥ると本考案の監視回路ＰＣ１、Ｐ Ｃ３がオンし２０秒後警報出力します。When the contact of 164VBTX is turned on, the monitoring circuits PC1 and PC3 of the present invention turn on and output an alarm 20 seconds later.
【００１６】[0016]
本考案は上述の実施することにより、次に記載する効果を奏する。 The present invention has the following effects by implementing the above.
【００１７】 変電所の直流電源回路は（図５）のようにＰＮ間を高抵抗で中点を接地してあ り、請求項１の２つの直列抵抗の中点を監視に採用することにより（図４）の使 用例では、ＤＧブスの対地間電位が０ボルトのままで、取り付け前と変わらず、 テスターによる電圧測定時の違和感がない。As shown in FIG. 5, the DC power supply circuit of the substation has a high resistance between PN and a middle point grounded, and the midpoint of the two series resistances according to claim 1 is used for monitoring. In the example of use (FIG. 4), the potential between the DG bus and the ground remains 0 volt, which is the same as before the installation, and there is no unnatural feeling when measuring the voltage with the tester.
【００１８】 請求項１および請求項２の監視回路（図２）を既設保護継電装置に取り付ける ことにより不良箇所の早期発見が出来、電力保護装置の信頼度を向上させること が出来る。By attaching the monitoring circuit (FIG. 2) according to claims 1 and 2 to an existing protection relay device, a defective portion can be detected early, and the reliability of the power protection device can be improved.
【００１９】 ＰＮ間の中点にフォトカプラを使用することにより制御回路の絶縁が出来、ロ ジック回路用電源装置を省略できる事による部品点数が減少する。By using a photocoupler at the midpoint between the PNs, the control circuit can be insulated, and the number of components can be reduced due to the omission of a logic circuit power supply device.
【００２０】 本考案の監視回路は既設保護継電装置の空きスペースに設置でき、不良箇所の 早期発見が容易に出来る。[0020] The monitoring circuit of the present invention can be installed in an empty space of the existing protective relay device, and a defective portion can be easily found early.
【図１】保護継電装置のトリップ回路構成概略図。FIG. 1 is a schematic diagram of a trip circuit configuration of a protection relay device.
【図２】本考案の保護継電装置の監視回路。FIG. 2 is a monitoring circuit of the protection relay device of the present invention.
【図３】本考案の監視回路の使用例。FIG. 3 shows an example of using the monitoring circuit of the present invention.
【図４】配電線地絡保護回路への監視回路の使用例FIG. 4 shows an example of using a monitoring circuit for a distribution line ground fault protection circuit.
【図５】変電所の直流電源回路の概要図FIG. 5 is a schematic diagram of a DC power supply circuit of a substation.
Ｒ１、Ｒ２、Ｒ３ 抵抗器 Ｄ１、Ｄ２、Ｄ３、Ｄ４ ダイオード ＰＣ１、ＰＣ２、ＰＣ３ フォトカプラ ＬＥＤ１，ＬＥＤ２ 発光ダイオード ＰＸ、ＮＸ リレー R1, R2, R3 Resistor D1, D2, D3, D4 Diode PC1, PC2, PC3 Photocoupler LED1, LED2 Light emitting diode PX, NX Relay
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０１Ｈ 47/00 Continued on the front page (51) Int.Cl. 7 Identification code FI H01H 47/00
Claims (2)
入し、その中点と保護継電装置の監視対象となる回路間
の電位差をフォトカプラにより検出する回路を設けたこ
とを特徴とする保護継電装置の監視回路。1. A circuit in which two resistors are inserted in series between a DC power supply PN and a circuit for detecting a potential difference between a middle point thereof and a circuit to be monitored by a protective relay by a photocoupler is provided. Monitoring circuit of the protection relay device.
それぞれの検出回路のアンド条件を検出出力とすること
によって検出回路の信頼度を向上させたことを特徴とす
る保護継電装置の監視回路。2. A monitoring circuit for a protective relay device, comprising two detection circuits each including a photocoupler and improving the reliability of the detection circuits by using the AND condition of each detection circuit as a detection output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001006624U JP3085294U (en) | 2001-10-11 | 2001-10-11 | Contact monitoring circuit for protective relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001006624U JP3085294U (en) | 2001-10-11 | 2001-10-11 | Contact monitoring circuit for protective relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3085294U true JP3085294U (en) | 2002-04-26 |
Family
ID=43236742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001006624U Expired - Fee Related JP3085294U (en) | 2001-10-11 | 2001-10-11 | Contact monitoring circuit for protective relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3085294U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541452A (en) * | 2018-11-23 | 2019-03-29 | 深圳市麦澜创新科技有限公司 | Relay adhesion detection device and method, battery management system and electric car |
-
2001
- 2001-10-11 JP JP2001006624U patent/JP3085294U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541452A (en) * | 2018-11-23 | 2019-03-29 | 深圳市麦澜创新科技有限公司 | Relay adhesion detection device and method, battery management system and electric car |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |