JPH01202034A - Opening/closing type high voltage protecting circuit - Google Patents
Opening/closing type high voltage protecting circuitInfo
- Publication number
- JPH01202034A JPH01202034A JP2578188A JP2578188A JPH01202034A JP H01202034 A JPH01202034 A JP H01202034A JP 2578188 A JP2578188 A JP 2578188A JP 2578188 A JP2578188 A JP 2578188A JP H01202034 A JPH01202034 A JP H01202034A
- Authority
- JP
- Japan
- Prior art keywords
- high voltage
- communication
- transmission line
- communication transmission
- breaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は開閉式高電圧保護回路に関し、特に通信伝送路
に発生した高電圧の保趨回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switching type high voltage protection circuit, and particularly to a protection circuit for high voltage generated in a communication transmission line.
従来、この種の高電圧保護回路は、例えば第２図に示す
ように伝送路に発生した高電圧を吸収する一次保獲素子
としての放電管５と、二次保護素子としてのバリスタ６
と、溶断ヒユーズ７とで伝送通信装置の入力回路部また
は出力回路部などの回路部８の保護を行う方法であった
。Conventionally, this type of high-voltage protection circuit has, for example, a discharge tube 5 as a primary protection element that absorbs high voltage generated in a transmission line, and a varistor 6 as a secondary protection element, as shown in FIG.
In this method, a circuit section 8 such as an input circuit section or an output circuit section of a transmission communication device is protected using a fuse 7 and a blowout fuse 7.
しかしながら、従来の高電圧保護回路は、−次保瞳素子
としての放電管５と二次保護素子としてのバリスタ６と
で構成され、高電圧が発生しているとき、伝送通信装置
の入力回路部または出力回路部８には、放電管５とバリ
スタ６とで吸収されない高電圧が印加するので、溶断ヒ
ユーズ７の溶断により、伝送通信装置の入力回路部また
は出力回路部８を高電圧゛から保護する方法であり、こ
の方法によると、溶断ヒユーズ７の溶断の都度、新らし
い溶断ヒユーズに変換するのに手間がかがシ、また、溶
断ヒユーズ７を交換する間、通信伝送路。However, the conventional high voltage protection circuit is composed of a discharge tube 5 as a negative pupil protection element and a varistor 6 as a secondary protection element, and when a high voltage is generated, the input circuit of the transmission communication device Alternatively, since a high voltage that is not absorbed by the discharge tube 5 and the varistor 6 is applied to the output circuit section 8, the input circuit section or the output circuit section 8 of the transmission communication device is protected from the high voltage by blowing the fuse 7. According to this method, each time the fuse 7 is blown, it is time-consuming to replace it with a new fuse, and while the fuse 7 is being replaced, the communication transmission line is damaged.
が障害状態になるなどの問題があった。There were problems such as the system becoming disabled.
したがって本発明は、前述した従来の問題に鑑みてなさ
れたものであり、その目的は、通信伝送路に障害を与え
ることなく、自動回復を可能とした開閉式高電圧保護回
路を提供する゛ことにある。Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide an open/close type high voltage protection circuit that enables automatic recovery without causing any damage to the communication transmission line. It is in.
本発明による開閉式高電圧保護回路は、通信伝送路上に
発生した高電圧を検出する検出器と、この検出器の出力
に対応して自動的に開閉制御される通信路開閉遮断器と
を有している。The switching type high voltage protection circuit according to the present invention includes a detector that detects high voltage generated on a communication transmission line, and a communication line switching circuit breaker that is automatically controlled to open and close in response to the output of this detector. are doing.
本発明においては、検出器が高電圧の発生を検知したと
きに通信路開閉遮断器を開放し、高電圧の発生を停止し
たときに通信路開閉遮断器を閉塞する。In the present invention, the communication path breaker is opened when the detector detects the generation of high voltage, and the communication path breaker is closed when the generation of high voltage is stopped.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例による開閉式高電圧保護回路
を示す回路図である。同図において、通信伝送路上の点
ａ１と点ａ２との間に発生した高電圧は、−次保護素子
としての放電管５によシ放電電流に変換され、接地点す
に流れる。この電流経路には、バリスターによる定電圧
部１と制御部２とで構成する高電圧を検出する検出器３
が設けられている。また、通信伝送路には検出器３の制
御部２によって自動的に開閉制御される通信路開閉遮断
器４が設けられている。通常時、通信路開閉遮断器４は
閉塞しておシ、通信伝送路が形成されている。高電圧の
発生時は通信伝送路上の点ａ１と点ａ２とから接地点す
に流れる放電電流により、検出器３の定電圧部１のバリ
スタに定電圧が生ずると同時に制御部２が動作し、通信
路開閉遮断器４が自動的に開放する。また、高電圧の発
生が停止したときは、放電電流がなくなシ、制御部２の
動作は停止し、同時に通信路開閉遮断器４が自動的に閉
塞し、通信伝送路が回復する。FIG. 1 is a circuit diagram showing an open/close type high voltage protection circuit according to an embodiment of the present invention. In the figure, a high voltage generated between points a1 and a2 on the communication transmission path is converted into a discharge current by a discharge tube 5 as a negative protection element, and flows to a ground point. This current path includes a detector 3 that detects high voltage, which is composed of a constant voltage section 1 using a varistor and a control section 2.
is provided. Further, the communication transmission path is provided with a communication path switch breaker 4 that is automatically controlled to open and close by the control unit 2 of the detector 3 . Normally, the communication path switch breaker 4 is closed and a communication transmission path is formed. When a high voltage is generated, a constant voltage is generated in the varistor of the constant voltage section 1 of the detector 3 due to the discharge current flowing from points a1 and a2 on the communication transmission path to the ground point, and at the same time, the control section 2 operates. The communication path switch breaker 4 automatically opens. Further, when the generation of high voltage stops, the discharge current disappears and the operation of the control unit 2 stops, and at the same time, the communication path switch breaker 4 is automatically closed and the communication transmission path is restored.
以上説明したように本発明は、通信伝送路上に発生した
高電圧を検出する検出器と、検出器によって自動的に開
閉制御される通信路開閉遮断器とを設けたことにより、
通信伝送路上に高電圧が発生している間、通信路開閉遮
断器は自動的に開放し、通信伝送路上に発生している高
電圧から伝送通信装置の入力回路部または出力回路部を
保護することができ、併せて高電圧の発生が停止した時
、通信路開閉遮断器は自動的に閉塞され、通信伝送路の
自動回復を容易に行なうことができるなどの極めて優れ
た効果が得られる。As explained above, the present invention provides a detector that detects high voltage generated on a communication transmission path, and a communication path switch breaker that is automatically controlled to open and close by the detector.
While high voltage is occurring on the communication transmission path, the communication path switch breaker automatically opens to protect the input circuit or output circuit of the transmission communication device from the high voltage occurring on the communication transmission path. In addition, when the generation of high voltage stops, the communication line switch is automatically closed, and the communication line can be easily restored automatically, which is an extremely excellent effect.
第１図は本発明の一実施例の開閉式高電圧保護回路の回
路図、第２図は従来の高電圧保護回路の回路図である。
１・・・・検出器の定電圧部、２・・・・通信路開閉遮
断器を制御する検出器の制御部、３・・・・検出器、４
・・・・検出器の制御部から制御される通信路開閉遮断
器、５・・−−高電圧を吸収する一次保護素子の放電管
、６・・・拳高電圧を吸収する二次保臆素子のバリスタ
、８・・会・伝送通信装置の入力回路部又は出力回路部
。FIG. 1 is a circuit diagram of an open/close type high voltage protection circuit according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional high voltage protection circuit. 1... Constant voltage section of the detector, 2... Control section of the detector that controls the communication path switch breaker, 3... Detector, 4
...Communication path switch breaker controlled by the control unit of the detector, 5...Discharge tube as a primary protection element that absorbs high voltage, 6...Secondary protection device that absorbs high voltage Varistor element, 8... Input circuit section or output circuit section of transmission communication device.
Claims (1)
る検出器と、この検出器の出力に対応して開閉制御され
る通信路開閉遮断器とを備えたことを特徴とする開閉式
高電圧保護回路。A switching type high voltage protection device characterized by comprising a detector that detects high voltage generated on a communication transmission path as a discharge current, and a communication path switching circuit breaker that is controlled to open and close in response to the output of this detector. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2578188A JPH01202034A (en) | 1988-02-08 | 1988-02-08 | Opening/closing type high voltage protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2578188A JPH01202034A (en) | 1988-02-08 | 1988-02-08 | Opening/closing type high voltage protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01202034A true JPH01202034A (en) | 1989-08-15 |
Family
ID=12175378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2578188A Pending JPH01202034A (en) | 1988-02-08 | 1988-02-08 | Opening/closing type high voltage protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01202034A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0439037U (en) * | 1990-07-25 | 1992-04-02 | ||
| US5272588A (en) * | 1989-03-01 | 1993-12-21 | Fujitsu Limited | Surge protector |
-
1988
- 1988-02-08 JP JP2578188A patent/JPH01202034A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5272588A (en) * | 1989-03-01 | 1993-12-21 | Fujitsu Limited | Surge protector |
| JPH0439037U (en) * | 1990-07-25 | 1992-04-02 |
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