JPH04275019A - Protective device against abnormally high input voltage - Google Patents
Protective device against abnormally high input voltageInfo
- Publication number
- JPH04275019A JPH04275019A JP3753591A JP3753591A JPH04275019A JP H04275019 A JPH04275019 A JP H04275019A JP 3753591 A JP3753591 A JP 3753591A JP 3753591 A JP3753591 A JP 3753591A JP H04275019 A JPH04275019 A JP H04275019A
- Authority
- JP
- Japan
- Prior art keywords
- varistor
- high voltage
- abnormally high
- input
- input lines
- 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
- 230000001681 protective effect Effects 0.000 title 1
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は各種電気機器における入
力異常高電圧に対する保護装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device against abnormal high voltage input in various electrical equipment.
【０００２】0002
【従来の技術】従来の入力異常高電圧に対する保護装置
においては、図２に示すように、入力線１１、１２間に
第１のバリスタ１３を接続し、入力線１１、１２のいず
れか一線に第２のバリスタ１４の一端を接続し、第２の
バリスタ１４の他端に放電素子１５の一端を接続し、こ
の放電素子１５の他端を、制御回路１６を内蔵したシャ
ーシ１７のアース点と同電位の導体面に接続することに
よって、入力異常高電圧から制御回路１６を保護してい
た。2. Description of the Related Art In a conventional protection device against abnormal input high voltage, a first varistor 13 is connected between input lines 11 and 12, and one of the input lines 11 and 12 is connected to One end of the second varistor 14 is connected, one end of the discharge element 15 is connected to the other end of the second varistor 14, and the other end of the discharge element 15 is connected to the ground point of the chassis 17 containing the control circuit 16. The control circuit 16 was protected from an abnormally high input voltage by connecting to a conductor surface having the same potential.
【０００３】例えば、入力線１１、１２間に異常高電圧
が印加されると、第１のバリスタ１３によって異常高電
圧がバリスタの制限電圧に抑制され、制御回路１６を保
護することができる。又、入力線１１、１２と大地間に
異常高電圧が印加された場合には、第２のバリスタ１４
と放電素子１５により、異常高電圧が放電素子１５の放
電電圧に制限され、制御回路１６を保護することができ
る。For example, when an abnormally high voltage is applied between the input lines 11 and 12, the first varistor 13 suppresses the abnormally high voltage to the voltage limit of the varistor, thereby protecting the control circuit 16. Furthermore, if an abnormally high voltage is applied between the input lines 11 and 12 and the ground, the second varistor 14
With the discharge element 15, the abnormally high voltage is limited to the discharge voltage of the discharge element 15, and the control circuit 16 can be protected.
【０００４】0004
【発明が解決しようとする課題】このような従来の入力
異常高電圧保護装置では、次のような問題があった。SUMMARY OF THE INVENTION Such conventional input abnormal high voltage protection devices have the following problems.
【０００５】■ バリスタ１３、１４と放電素子１５
が小物部品であり、接続作業の困難な小物部品が多い。
また、バリスタ１３、１４と放電素子１５を電気機器内
に配置する場合、バリスタ１３、１４と放電素子１５を
固定化するためにプリント基板による固定化が必要とな
り、配置作業に多大なコストを要していた。■ Varistors 13 and 14 and discharge element 15
are small parts, and there are many small parts that are difficult to connect. Furthermore, when arranging the varistors 13, 14 and the discharge element 15 in an electrical device, it is necessary to use a printed circuit board to fix the varistors 13, 14 and the discharge element 15, which requires a large amount of cost for the arrangement work. Was.
【０００６】■ 電気機器によって制限する電圧が異
なるため、機器に応じた放電素子１５を選択する必要が
あり、多数の部品を用意する必要があった。[0006] Since the voltage to be restricted differs depending on the electrical equipment, it was necessary to select the discharge element 15 according to the equipment, and it was necessary to prepare a large number of parts.
【０００７】本発明は上記従来の問題点に鑑み、放電素
子を不要にして回路構成を簡素化し、コスト低下を図っ
た入力異常高電圧保護装置を提供することを目的とする
。SUMMARY OF THE INVENTION In view of the above conventional problems, it is an object of the present invention to provide an abnormal input high voltage protection device which eliminates the need for a discharge element, simplifies the circuit configuration, and reduces costs.
【０００８】[0008]
【課題を解決するための手段】本発明の入力異常高電圧
保護装置は、入力線間に第１のバリスタを接続し、入力
線のいずれか一線に第２のバリスタの一端を接続し、第
２のバリスタの他端と制御回路を内蔵するシャーシのア
ース点と同電位の導体面との間に１．５ｍｍ〜３ｍｍの
エアギャップを設けたことを特徴とする。[Means for Solving the Problems] The abnormal input high voltage protection device of the present invention includes a first varistor connected between the input lines, one end of the second varistor connected to any one of the input lines, and a first varistor connected between the input lines. The present invention is characterized in that an air gap of 1.5 mm to 3 mm is provided between the other end of the varistor No. 2 and a conductor surface having the same potential as the ground point of the chassis containing the control circuit.
【０００９】[0009]
【作用】本発明は上記した構成により、小物部品が第１
と第２バリスタだけとなって回路構成が簡単になり、ま
た小物部品に対する接続工数が少なくなるとともに第１
と第２のバリスタを配置するだけで良いためコストを大
幅に低下でき、また制限する電圧が異なってもエアギャ
ップを変更するだけでよく、多数の部品を用意する必要
もない。[Operation] The present invention has the above-described structure, so that the small parts are the first
The circuit configuration is simplified with only the second varistor and the number of man-hours required for connecting small parts is reduced.
Since it is only necessary to arrange the first varistor and the second varistor, the cost can be significantly reduced, and even if the voltage to be restricted is different, it is only necessary to change the air gap, and there is no need to prepare a large number of parts.
【００１０】0010
【実施例】以下、本発明の一実施例の入力異常高電圧保
護装置を図１を参照しながら説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An abnormal input high voltage protection device according to an embodiment of the present invention will be described below with reference to FIG.
【００１１】図１において、入力線１、２間に第１のバ
リスタ３が接続され、入力線１と２のいずれか一線（図
示例では入力線２）に第２のバリスタ４の一端が接続さ
れている。そして、第２のバリスタ４の他端と、制御回
路６を内蔵したシャーシ７のアース点と同電位の導体面
との間に、１．５ｍｍ〜３ｍｍの範囲でギャップの大き
さを任意に調整可能なエアギャップ５が介装されている
。In FIG. 1, a first varistor 3 is connected between input lines 1 and 2, and one end of a second varistor 4 is connected to one of input lines 1 and 2 (input line 2 in the illustrated example). has been done. Then, the size of the gap is arbitrarily adjusted between the other end of the second varistor 4 and the conductor surface having the same potential as the ground point of the chassis 7 containing the control circuit 6 in the range of 1.5 mm to 3 mm. A possible air gap 5 is interposed.
【００１２】以上の構成において、例えば入力線１、２
間に異常高電圧が印加されると、第１のバリスタ３によ
ってそのバリスタの制限電圧に異常高電圧が抑制され、
制御回路６が異常高電圧から保護される。In the above configuration, for example, input lines 1 and 2
When an abnormally high voltage is applied between the two, the first varistor 3 suppresses the abnormally high voltage to the limit voltage of the varistor,
The control circuit 6 is protected from abnormally high voltage.
【００１３】又、入力線１又は２と大地間に異常高電圧
が印加された場合には、第２のバリスタ４とエアギャッ
プ５により、異常高電圧がエアギャップ５の放電電圧に
制限され、制御回路６が異常高電圧から保護される。Furthermore, when an abnormally high voltage is applied between the input line 1 or 2 and the ground, the second varistor 4 and the air gap 5 limit the abnormally high voltage to the discharge voltage of the air gap 5. The control circuit 6 is protected from abnormally high voltage.
【００１４】[0014]
【発明の効果】本発明の入力異常高電圧保護装置によれ
ば、次のような効果を発揮する。According to the abnormal input high voltage protection device of the present invention, the following effects are achieved.
【００１５】■ エアギャップを使用することにより
、多大なコストを要していた放電素子の配置作業が不要
となるので、大幅なコスト低下を図れる。[0015] By using an air gap, the work of arranging the discharge elements, which requires a great deal of cost, is no longer necessary, so that a significant cost reduction can be achieved.
【００１６】■ 機器に応じて選定していた放電素子
が不要となり、どの機器でも対応できるエアギャップを
構成することで部品の削減が可能となる。[0016] ■ The discharge element that was selected depending on the equipment becomes unnecessary, and the number of parts can be reduced by configuring an air gap that can be used with any equipment.
【００１７】■ 放電素子が不要となることで、より
簡単な回路で電気機器を入力異常高電圧から保護するこ
とができる。[0017] By eliminating the need for a discharge element, electrical equipment can be protected from abnormal high voltage input with a simpler circuit.
【図１】本発明の一実施例の入力異常高電圧保護装置の
ブロック図である。FIG. 1 is a block diagram of an abnormal input high voltage protection device according to an embodiment of the present invention.
【図２】従来例の入力異常高電圧保護装置のブロック図
である。FIG. 2 is a block diagram of a conventional input abnormal high voltage protection device.
１ 入力線 ２ 入力線 ３ 第１のバリスタ ４ 第２のバリスタ ５ エアギャップ ６ 制御回路 ７ シャーシ 1 Input line 2 Input line 3 First barista 4 Second barista 5 Air gap 6 Control circuit 7 Chassis
Claims (1)
入力線のいずれか一線に第２のバリスタの一端を接続し
、第２のバリスタの他端と制御回路を内蔵するシャーシ
のアース点と同電位の導体面との間に１．５ｍｍ〜３ｍ
ｍのエアギャップを設けたことを特徴とする入力異常高
電圧保護装置。Claim 1: A first varistor is connected between the input lines,
Connect one end of the second varistor to one of the input lines, and maintain a distance of 1.5 mm to 3 m between the other end of the second varistor and a conductor surface with the same potential as the ground point of the chassis containing the control circuit.
An abnormal input high voltage protection device characterized by providing an air gap of m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3753591A JPH04275019A (en) | 1991-03-04 | 1991-03-04 | Protective device against abnormally high input voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3753591A JPH04275019A (en) | 1991-03-04 | 1991-03-04 | Protective device against abnormally high input voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04275019A true JPH04275019A (en) | 1992-09-30 |
Family
ID=12500220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3753591A Pending JPH04275019A (en) | 1991-03-04 | 1991-03-04 | Protective device against abnormally high input voltage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04275019A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168352A (en) * | 1984-09-07 | 1986-04-08 | Fuji Fiber Glass Kk | Glass fiber treating agent composition |
| JPS6241667A (en) * | 1985-04-09 | 1987-02-23 | テルモ株式会社 | Adsorbing material for immunoglobrin and adsorbing apparatusequipped therewith |
-
1991
- 1991-03-04 JP JP3753591A patent/JPH04275019A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168352A (en) * | 1984-09-07 | 1986-04-08 | Fuji Fiber Glass Kk | Glass fiber treating agent composition |
| JPS6241667A (en) * | 1985-04-09 | 1987-02-23 | テルモ株式会社 | Adsorbing material for immunoglobrin and adsorbing apparatusequipped therewith |
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