JPS6188722A - Protector for communication - Google Patents
Protector for communicationInfo
- Publication number
- JPS6188722A JPS6188722A JP20745184A JP20745184A JPS6188722A JP S6188722 A JPS6188722 A JP S6188722A JP 20745184 A JP20745184 A JP 20745184A JP 20745184 A JP20745184 A JP 20745184A JP S6188722 A JPS6188722 A JP S6188722A
- Authority
- JP
- Japan
- Prior art keywords
- protector
- communication line
- internal communication
- resistance element
- terminal
- 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)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、落雷または電力線の混触等により通信回線に
生じる異常電圧および異常電流から交換局内通信機器を
保護する通信用保護器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication protector that protects communication equipment within a switching center from abnormal voltages and abnormal currents generated in communication lines due to lightning strikes, power line crosstalk, or the like.
従来、この株の通信用保護器は第2図に示すように1内
部通信線A−BおよびC−Dと接地端子41との間に設
けられたガス入避雷管42と、このガス入避雷管42と
内部通信線A−BおよびC−Dとの接続箇所の交換機器
側にそれぞれ設けられたヒートコイル(熱線輪)43と
から成り外部通信線と被保護通信機器との間の本配線盤
(MDF)上に設けられた1次保護器4と、この1次保
護器の後段の加入者回路(LC)内に設けられ内部通信
線A−BおよびC−Dと接地端子51との間にそれぞれ
接続された金属酸化物バリスタ52から成る2次保護器
5とから構成されていた。Conventionally, this type of communication protector has a gas input detonator 42 provided between one internal communication line A-B and CD and a grounding terminal 41, as shown in FIG. The main wiring between the external communication line and the protected communication equipment consists of heat coils 43 provided on the exchange equipment side at the connection points between the pipe 42 and the internal communication lines A-B and CD. The primary protector 4 provided on the board (MDF), the internal communication lines A-B and CD provided in the subscriber circuit (LC) after this primary protector, and the ground terminal 51. and a secondary protector 5 consisting of a metal oxide varistor 52 connected between the two.
各素子の電気的特性は、ガス入避雷管42の放電開始電
圧が概ね400V、ヒートコイル43の電流容量は35
0 mA 、金槙酸化物バリスタ52のバリスタ電圧は
1mA通電等120■程度である。The electrical characteristics of each element are that the discharge starting voltage of the gas entry detonator 42 is approximately 400V, and the current capacity of the heating coil 43 is 35V.
0 mA, and the varistor voltage of the gold-maki oxide varistor 52 is about 120 cm, such as when 1 mA is applied.
この様な素子で構成された通信用保護器において1例え
ば落雷によシ異常電圧が内部通信線A −BおよびC−
Dに誘導されると、動作電圧が低く応答スピードの速い
金属酸化物バリスタ52がクランプ動作し、通信線A−
BおよびC−Dへの印加電圧は概ね250V以下の値と
なるが、ヒートコイル43の直流抵抗値が4Ω程度と小
さいため、ガス入避雷管42が点弧するのに必要な電圧
に到達しない。このため金属酸化物バリスタ52が、殆
んど雷サージエネルギーを吸収せねばならず過大エネル
ギー印加によシ金属酸化物バリスタ52の特性劣化、短
絡故障等の障害が生じる。又、外部通信線にAC200
V等の電力線が混触した場合には、落雷に対する動作と
同様に金属酸化物バリスタ52がクランプ動作するが、
電力線混触が長時間(概ね5秒以上)に恒って持続する
と金属酸化物バリスタ52は異常発熱し、特性劣化や短
絡故障および焼損を招く。この際ヒートコイル43の最
小動作電流は0.5A程度と大きな値であるため、金属
酸化物バリスタ52の特性劣化、短絡故障、焼損等を防
止することは不可能であった。また、近年のLSI化に
伴なう通信機器の耐電圧低下に対応するため、通信用保
護器の出力電圧も、より低い電圧からの保護が必要とさ
れているが、第2図に示す通信用保護器ではそれが不可
能であった0
〔問題点を解決するための手段〕
本発明の通信用保護器は外部通信線側接続端子と被保護
通信機器側接続端子との間の内部通信線に直列接続配置
した正特性サーミスタと抵抗素子とこれら前記正特性サ
ーはスタと前記抵抗素子との接続箇所と接地端子との間
に挿入配置したガス入避雷管とを有する第1の保護器と
、この第1の保護器の後段に位置し前記内部通信線と接
地端子との間に非直線抵抗素子を有する第2の深護看と
、この第2の保護器の後段に位置し前記内部通信暇と直
列に接続した抵抗素子と陽極を接地し[3軛が前記内部
通信線に接続した第1のダイオードと陰極を電源端子に
接続し陽極を前記内部通信線に接続した第2のダイオー
ドとを有する第3の保護器とから構成されたことを特徴
とする。In a communication protector composed of such elements, abnormal voltage may be caused by a lightning strike, for example, on the internal communication lines A-B and C-.
When induced by D, the metal oxide varistor 52, which has a low operating voltage and fast response speed, performs a clamping operation, and the communication line A-
The voltage applied to B and C-D is approximately 250V or less, but because the DC resistance of the heating coil 43 is as small as about 4Ω, the voltage required for igniting the gas entry detonator 42 is not reached. . Therefore, the metal oxide varistor 52 must absorb most of the lightning surge energy, and excessive energy application causes problems such as deterioration of the characteristics of the metal oxide varistor 52 and short-circuit failure. Also, connect AC200 to the external communication line.
When power lines such as V are in contact with each other, the metal oxide varistor 52 performs a clamping operation similar to the operation in response to a lightning strike.
If power line contact continues for a long time (approximately 5 seconds or more), the metal oxide varistor 52 will generate abnormal heat, leading to characteristic deterioration, short circuit failure, and burnout. At this time, since the minimum operating current of the heating coil 43 is a large value of about 0.5 A, it has been impossible to prevent characteristic deterioration, short circuit failure, burnout, etc. of the metal oxide varistor 52. In addition, in order to cope with the drop in withstand voltage of communication equipment due to the shift to LSI in recent years, the output voltage of communication protectors also needs to be protected from lower voltages. [Means for solving the problem] The communication protector of the present invention prevents internal communication between the external communication line side connection terminal and the protected communication device side connection terminal. A first protector having a positive characteristic thermistor and a resistive element connected in series to a line, and a gas entry detonator inserted between a connection point between the positive characteristic thermistor and the resistive element and a ground terminal. a second deep care device located after the first protector and having a non-linear resistance element between the internal communication line and the ground terminal; A resistive element and an anode connected in series with the internal communication line are grounded; a first diode connected to the internal communication line and a cathode connected to the power supply terminal; and a third protector having a diode.
次に本発明の実施例について図面を参照して説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第1図を参照すると、本発明の一実施例において、1次
保護器1は外部通信線と被保護通信機器との間のインタ
ーフェイス部分に施設される本配線盤(MDF)に搭載
され、2次および3次保護器2および3は加入者回路(
LC)に各々搭載されておシ、1次保護器1と2次およ
び3次保護器2および3とはラッピング接続手段等によ
シ、ケーブルで接続されている。AおよびCは外部通信
線側接続端子、BおよびDは被保護通信機器側接続端子
である。Referring to FIG. 1, in one embodiment of the present invention, a primary protector 1 is mounted on a main distribution frame (MDF) installed at an interface between an external communication line and a protected communication device, and 2 Secondary and tertiary protectors 2 and 3 are subscriber circuits (
The primary protector 1 and the secondary and tertiary protectors 2 and 3 are connected by wrapping connection means or the like and a cable. A and C are connection terminals on the external communication line side, and B and D are connection terminals on the protected communication equipment side.
1次保護器1は異常電流を制限するための電流制限素子
である正特性サーミスタ11がそれぞれ内部通信MA−
BおよびC−Dに直列に接続され、この正特性サーミス
タ11のそれぞれの接続箇所と接地端子12との間に気
体の低圧ガス放電を利用したガス入避雷管13が接続さ
れ、このガス入避雷管13の接続箇所の後方にガス入避
雷管13を点弧放電しやすくするための抵抗素子14が
それぞれ接続されている。The primary protector 1 has a positive characteristic thermistor 11, which is a current limiting element for limiting abnormal current, connected to an internal communication MA-
B and C-D in series, and a gas input detonator 13 that utilizes low-pressure gas discharge is connected between each connection point of the positive characteristic thermistor 11 and the ground terminal 12. Resistance elements 14 are connected to the rear of the connection points of the tubes 13 to facilitate ignition and discharge of the gas entry detonators 13.
2次保護器2は1次保護器lの後段に位置し、内部通信
線A−BおよびC−Dと接地端子21との間にそれぞれ
接続された金属酸化物バリスタ22から成る。The secondary protector 2 is located after the primary protector l and consists of metal oxide varistors 22 connected between the internal communication lines AB and CD and the ground terminal 21, respectively.
3次保護器3は2次保護器2の後段に位置し、内部通信
線A−BおよびC−Dに直列に挿入配置された抵抗素子
31と陽極がそれぞれ接地端子32に接続され陰極がそ
れぞれ内部通信線A−BおよびC−Dに接続された第1
のダイオード33と陰極がそれぞれ電源端子−VBB3
4に接続され111極がそれぞれ内部通信線A−Bおよ
びC−Dに接続された第2のダイオード35とから構成
されている。抵抗素子31はダイオード群33および3
5の電流制限並びに2次保護器2の非直線抵抗素子22
をクランプ動作しやすくするためのものである。The tertiary protector 3 is located after the secondary protector 2, and has a resistance element 31 inserted in series in internal communication lines A-B and CD, an anode connected to a ground terminal 32, and a cathode connected to the ground terminal 32. The first connected to internal communication lines A-B and C-D.
The diode 33 and cathode of are respectively connected to the power supply terminal -VBB3.
4 and a second diode 35 whose 111 poles are connected to internal communication lines A-B and CD, respectively. Resistance element 31 includes diode groups 33 and 3
5 current limit and non-linear resistance element 22 of secondary protector 2
This is to make the clamp operation easier.
次に本実施例の動作について説明する。第1図に示す各
素子の電気的特性は、ガス入避雷管13、の放電開始電
圧が250V、金属酸化物バリスタ22の1mA通電等
の端子電圧即ちバリスタ電圧が100V、抵抗素子14
の抵抗値が27Ω、抵抗素子31の抵抗値が50Ω、正
特性サーミスタ11の直流抵抗値が10Ωおよび電流制
限する最少動作′v7L流が0、3 Aである。Next, the operation of this embodiment will be explained. The electrical characteristics of each element shown in FIG.
The resistance value of the resistance element 31 is 50Ω, the DC resistance value of the positive temperature coefficient thermistor 11 is 10Ω, and the minimum operation 'v7L current for current limiting is 0.3A.
落雷によって外部通信線に異常電圧が誘起されると、次
に示す3つの保護動作により雷サージ電圧を抑圧する。When an abnormal voltage is induced in an external communication line by a lightning strike, the lightning surge voltage is suppressed by the following three protective operations.
サージ電流が2A以下の場合、このサージ電流は正特性
サーミスタ11.抵抗素子14.抵抗素子31およびダ
イオード33を通って接地端子32に流れて3次保護器
3が働き、ダイオード33の順電流−順電圧特性によシ
サージ電圧は数7以内に抑圧される。When the surge current is 2A or less, this surge current is passed through the positive characteristic thermistor 11. Resistance element 14. The voltage flows through the resistance element 31 and the diode 33 to the ground terminal 32, and the tertiary protector 3 works, and the forward current-forward voltage characteristic of the diode 33 suppresses the sissage voltage to within the equation 7.
サージ電流が2A〜IOA程度の場合、金属酸化物バリ
スタ22の端子電圧がバリスタ電圧100V以上(50
Ω×サージ電流、即ち抵抗素子3,1による電圧降下分
)となるので金属酸化物バリスタ22がクランプ動作し
て2次保護器2が働く。When the surge current is about 2A to IOA, the terminal voltage of the metal oxide varistor 22 is higher than the varistor voltage 100V (50V).
The metal oxide varistor 22 performs a clamping operation and the secondary protector 2 operates.
サージ電流がIOA以上の場合は、ガス入避雷管13の
端子電圧が放電開始電圧250v以上(金属酸化物バリ
スタ22の端子電圧+抵抗素子14による電圧降下分)
となるのでガス入避雷管13がクランプ動作して1次保
護器が働く。When the surge current is IOA or more, the terminal voltage of the gas entry detonator 13 is the discharge starting voltage of 250 V or more (terminal voltage of the metal oxide varistor 22 + voltage drop due to the resistance element 14).
Therefore, the gas inlet detonator 13 is clamped and the primary protector is activated.
次に、外部通信線にAC200V等の電力線が混触した
場合の保護動作を説明する。Next, a protective operation when a power line such as AC 200 V comes into contact with an external communication line will be explained.
混触による接続電流が0.3 A以下の場合、この混触
電流は正特性サーミスタ11.抵抗素子14゜抵抗素子
31およびダイオード33を通り接地端子32に流れ、
通信機器側には混触電流は流れない。If the connection current due to cross-contact is 0.3 A or less, this cross-contact current flows through positive temperature coefficient thermistor 11. Resistance element 14° flows through resistance element 31 and diode 33 to ground terminal 32,
No cross-contact current flows to the communication equipment side.
混触電流が0.3A〜2人程度の場合、正特性サーミス
タ11の自己発熱によって抵抗値が急激に増大し、混触
電流を数十mA以下まで電流制限する。When the cross-contact current is about 0.3 A to 2 people, the resistance value increases rapidly due to self-heating of the PTC thermistor 11, and the cross-contact current is limited to several tens of mA or less.
混触電流が2Å以上の場合、正特性サーミスタ11が電
流制限を行なうまでの間に金属酸化物バリスタ22の端
子電圧がバリスタ電圧以上となるので金属酸化物バリス
タ22に混触電流が流れ込み、通信機器を保護する。正
特性サーミスタ11の抵抗値増大による%光制限後は金
属酸化物バリスタ22には電流は流れなくなシ、通信機
器は正特性サーミスタ11の電流制限作用だけで保護さ
れる。If the contact current is 2 Å or more, the terminal voltage of the metal oxide varistor 22 becomes equal to or higher than the varistor voltage before the PTC thermistor 11 limits the current, so the contact current flows into the metal oxide varistor 22, damaging the communication equipment. Protect. After the % light is limited by the increase in the resistance value of the PTC thermistor 11, no current flows through the metal oxide varistor 22, and the communication equipment is protected only by the current limiting action of the PTC thermistor 11.
更に混触電流がIOA以上となると、正特性サーミスタ
11が電流制限を行なうまでの間にガス入道雷管12に
印加される端子電圧が放電開始電圧以上となり、ガス入
避雷管12が放電を開始する。その後に正特性サーミス
タ11によシミ光制限が行なわれる。なお、2次保護器
の金属酸化物バリスタ22に変えてツェナーダイオード
等の他の非直線性抵抗素子を用いても同様の効果が期待
できる。Furthermore, when the contact current exceeds IOA, the terminal voltage applied to the gas entry detonator 12 becomes equal to or greater than the discharge start voltage until the positive temperature coefficient thermistor 11 limits the current, and the gas entry detonator 12 starts discharging. Thereafter, stain light limitation is performed by the positive temperature coefficient thermistor 11. Note that the same effect can be expected even if another nonlinear resistance element such as a Zener diode is used in place of the metal oxide varistor 22 of the secondary protector.
本発明は以上説明したように、正特性サーミスタとガス
入避雷管と抵抗素子とから成る1次保護器と、金属酸化
物バリスタ又はツェナーダイオード等の非直線性抵抗素
子から成る2次保護器と、抵抗素子と第1および第2の
ダイオードとから成る3次保護器とから通信用保護器を
構成し、1次保護器に比較的大きなエネルギー負担を、
3次保護器に比較的小さなエネルギー負担を、2次保護
器にこれらの中間的なエネルギー負担をそれぞれ受は持
たせる機能分担構成とすることによシ、被保護通信機器
の耐電圧の低下に対応でき、かつ故障が少なく信頼度の
高い通信用保護器が得られる。As explained above, the present invention includes a primary protector consisting of a positive characteristic thermistor, a gas entry detonator, and a resistance element, and a secondary protector consisting of a nonlinear resistance element such as a metal oxide varistor or a Zener diode. A communication protector is constructed from a resistive element and a tertiary protector consisting of first and second diodes, and a relatively large energy burden is placed on the primary protector.
By adopting a functional sharing configuration in which the tertiary protector has a relatively small energy burden, and the secondary protector has an intermediate energy burden, it is possible to prevent a drop in the withstand voltage of the protected communication equipment. It is possible to obtain a communication protector that is compatible with the above, has few failures, and is highly reliable.
第1図は本発明の一実施例を示す回路図、第2図は従来
の通信用保護器を示す回路図である。
1・・・・・・1次保護器、11・・・・・・正特性サ
ーミスタ、12・・・・・・接地端子、13・・・・・
・ガス入避雷管、14・・・・・・抵抗素子、2・・・
・・・2次保護器、21・・・・・・接地端子、22・
・・・・・金属酸化物バリスタ、3・・・・・・3次保
護器、31・・・・・・抵抗素子、32・・・・・・接
地端子、33・・・・・・第1のダイオード、34・・
・・・・電源端子(’1n)s35・・・・・・第2の
ダイオード、A、C・・・・・・外部通信線側接続端子
、B、D・・・・・・被保護通信機器側接続端子、4・
・・・・・1次保護器、41・・・・・・接地端子、4
2・・・・・・ガス入避雷管、43・・・・・・ヒート
コイル、5・・・・・・2次保護器、51・・・・・・
接地端子、52・・・・・・金属酸化物バリスタ。FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional communication protector. 1...Primary protector, 11...Positive characteristic thermistor, 12...Grounding terminal, 13...
・Gas entry detonator, 14... Resistance element, 2...
... Secondary protector, 21 ... Ground terminal, 22.
... Metal oxide varistor, 3 ... Tertiary protector, 31 ... Resistance element, 32 ... Ground terminal, 33 ...... No. 1 diode, 34...
...Power supply terminal ('1n) s35...Second diode, A, C...External communication line side connection terminal, B, D...Protected communication Device side connection terminal, 4.
...Primary protector, 41...Ground terminal, 4
2...Gas inlet detonator, 43...Heat coil, 5...Secondary protector, 51...
Ground terminal, 52...Metal oxide varistor.
Claims (1)
間の内部通信線に直列接続配置した正特性サーミスタと
抵抗素子とこれら前記正特性サーミスタと前記抵抗素子
との接続個所と接地端子との間に挿入配置したガス入避
雷管とを有する第1の保護器と、この第1の保護器の後
段に位置し前記内部通信線と接地端子との間に非直線抵
抗素子を有する第2の保護器と、この第2の保護器の後
段に位置し前記内部通信線と直列に接続した抵抗素子と
陽極を接地し陽極が前記内部通信線に接続した第1のダ
イオードと陰極を電源端子に接続し陽極を前記内部通信
線に接続した第2のダイオードとを有する第3の保護器
とから構成されたことを特徴とする通信用保護器。A positive temperature coefficient thermistor and a resistance element arranged in series on an internal communication line between an external communication line side connection terminal and a protected communication device side connection terminal, a connection point between the positive temperature coefficient thermistor and the resistance element, and a ground terminal. a first protector having a gas entry detonator inserted therebetween; and a second protector located after the first protector and having a non-linear resistance element between the internal communication line and the ground terminal. a resistive element located after the second protector and connected in series with the internal communication line, and a first diode whose anode is grounded and whose anode is connected to the internal communication line, and whose cathode is connected to a power supply terminal. and a third protector having a second diode connected to the internal communication line and having an anode connected to the internal communication line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20745184A JPS6188722A (en) | 1984-10-03 | 1984-10-03 | Protector for communication |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20745184A JPS6188722A (en) | 1984-10-03 | 1984-10-03 | Protector for communication |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6188722A true JPS6188722A (en) | 1986-05-07 |
Family
ID=16539985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20745184A Pending JPS6188722A (en) | 1984-10-03 | 1984-10-03 | Protector for communication |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6188722A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9597222B2 (en) | 2012-10-10 | 2017-03-21 | The Procter & Gamble Company | Intra-vaginal device withdrawal assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57193934A (en) * | 1981-05-25 | 1982-11-29 | Nippon Telegraph & Telephone | Lightning surge protecting circuit |
JPS58108857A (en) * | 1981-12-23 | 1983-06-29 | Fujitsu Ltd | Overcurrent protecting circuit |
-
1984
- 1984-10-03 JP JP20745184A patent/JPS6188722A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57193934A (en) * | 1981-05-25 | 1982-11-29 | Nippon Telegraph & Telephone | Lightning surge protecting circuit |
JPS58108857A (en) * | 1981-12-23 | 1983-06-29 | Fujitsu Ltd | Overcurrent protecting circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9597222B2 (en) | 2012-10-10 | 2017-03-21 | The Procter & Gamble Company | Intra-vaginal device withdrawal assembly |
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