JPH01311822A - Protective circuit against surge - Google Patents
Protective circuit against surgeInfo
- Publication number
- JPH01311822A JPH01311822A JP13844688A JP13844688A JPH01311822A JP H01311822 A JPH01311822 A JP H01311822A JP 13844688 A JP13844688 A JP 13844688A JP 13844688 A JP13844688 A JP 13844688A JP H01311822 A JPH01311822 A JP H01311822A
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- Prior art keywords
- surge
- arrester
- surge protection
- voltage
- pole
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- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000001629 suppression Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は雷サージにさらされる屋内外の電子機器のサー
ジ保護回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a surge protection circuit for indoor and outdoor electronic equipment exposed to lightning surges.
（従来の技術）
配電線の柱上トランスを介して電源を引込んでいる屋外
の機器は、雷サージによる破壊を防ぐため、その電源入
力回路にサージ保護回路を装備することが常である。(Prior Art) Outdoor equipment that receives power through a pole-mounted transformer on a power distribution line is usually equipped with a surge protection circuit in its power input circuit to prevent damage caused by lightning surges.
このサージ保護回路は、インパルス性の雷サージをバイ
パスすることにより低い電圧に抑制し、その後に接続さ
れている電子回路を保護する。従来のサージ保護回路は
、第５図に示す様な構成となっている。This surge protection circuit bypasses impulsive lightning surges and suppresses them to a low voltage, thereby protecting the electronic circuits connected afterwards. A conventional surge protection circuit has a configuration as shown in FIG.
配電線の柱上トランス２から引込まれる電源線Ａ、Ｂ間
にサージ保護回路１１を挿入し、更に電源線Ａ、Ｂと屋
外機器１のフレームグランド間Ｇ間にサージ保護回路１
２．１３を挿入している。A surge protection circuit 11 is inserted between the power lines A and B drawn from the pole transformer 2 of the distribution line, and a surge protection circuit 1 is further inserted between the power lines A and B and the frame ground G of the outdoor equipment 1.
2.13 has been inserted.
このサージ保護回路１２．１３は通常、柱」ニドランス
の２次側が第２種接地Ｅ１を施している為、平常状態に
於いては屋外機器１の端子ＢとＦＧ間は同電位である事
より必要ない様に思われやすい。しかし、雷サージ電流
が接地Ｅ１に流わた場合、第２種接地の接地抵抗及び接
地線のインダクタンスによる電圧降下が生じ、この電圧
が屋外機器〕の電源線Ａ、ＢとＦＧ間に大地間サージ電
圧となって現れるので、抑制する為にサージ保護回路１
２．１３は必要となるものである。This surge protection circuit 12.13 usually has the second type grounding E1 on the secondary side of the pillar Nidorance, so under normal conditions, the terminals B and FG of the outdoor equipment 1 are at the same potential. It is easy to think that it is not necessary. However, if a lightning surge current flows through the ground E1, a voltage drop will occur due to the grounding resistance of the second type grounding and the inductance of the grounding wire, and this voltage will cause a ground surge between the power lines A, B and FG of the outdoor equipment. Since it appears as a voltage, surge protection circuit 1 is installed to suppress it.
2.13 is required.
（発明を解決しようとする課題）
従来の第５図のサージ保護回路１１．１２．１３の構成
は、第６図の様に各種のサージ吸収素子で構成されてい
るが、下記の様な長所短所がある。(Problems to be Solved by the Invention) The conventional configuration of surge protection circuits 11, 12, and 13 shown in FIG. 5 is composed of various surge absorbing elements as shown in FIG. 6, but it has the following advantages. There are disadvantages.
（ａ）はギャップ付アレスタ（以後アレスタと称す）で
、第４図の一点鎖線Ｆ、０で示す様な特性を有している
。(a) is an arrester with a gap (hereinafter referred to as an arrester), which has characteristics as shown by the dash-dotted line F, 0 in FIG.
特性カーブで分る様に放電した時の制限電圧（Ｅ、）は
低いが、インパルス放電開始電圧（Ｅｇ）は高いという
特徴がある。As can be seen from the characteristic curve, the limiting voltage (E,) during discharge is low, but the impulse discharge starting voltage (Eg) is high.
又、常時電圧が印加状態で使われると、放電した時に続
流が発生し易い。Furthermore, if the battery is used with a constant voltage applied, follow-on current is likely to occur when discharged.
（ｂ）は非線形素子であるギャップレスアレスタ（以後
バリスタと称す）で、第４図の点線ｅ。で示す様な特性
を有している。(b) is a gapless arrester (hereinafter referred to as a varistor) which is a nonlinear element, and is indicated by the dotted line e in FIG. It has the characteristics shown in .
特性カーブで分る様に、雷インパルス電圧（ｅ）印加し
始めの制限電圧は低いが、雷インパルス電圧の立上りに
よる電流の増加に伴ない制限電圧が高くなる。As can be seen from the characteristic curve, the limiting voltage at the beginning of applying the lightning impulse voltage (e) is low, but as the current increases due to the rise of the lightning impulse voltage, the limiting voltage increases.
又、電流が流れる事によるバリスタ自身の発熱で特性劣
化が起り易い。Furthermore, characteristics are likely to deteriorate due to heat generated by the varistor itself due to the flow of current.
更に、常時電圧印加状態で使われると、漏れ電流による
特性劣化も懸念される。Furthermore, if the device is used with a constant voltage applied, there is a concern that characteristics may deteriorate due to leakage current.
（Ｃ）はアレスタとバリスタを直列に組合せて用いるも
ので、インパルス放電開始電圧はアレスタの特性で決ま
り、制限電圧はバリスタの特性で決まる為、雷サージを
出来だＧブ低く抑える点では（ａ）、 （ｂ）より劣る
。(C) uses an arrester and a varistor in series; the impulse discharge starting voltage is determined by the characteristics of the arrester, and the limiting voltage is determined by the characteristics of the varistor. ), inferior to (b).
以上の長所短所を勘案した上で最近は、・ 常時電圧印
加状態で使用していでも、アレスタでバリスタの漏れ電
流をしゃ断している為、漏れ電流によるバリスタの特性
劣化が防止でき机
・ アレスタの続流をバリスタでしゃ断する為、続流防
止特性がすぐれている。Taking into account the above advantages and disadvantages, recently, the arrester blocks the leakage current of the varistor even when used with constant voltage applied, so deterioration of the characteristics of the varistor due to leakage current can be prevented. Since the following current is blocked by a varistor, it has excellent follow current prevention properties.
ことより（ｃ）方式がよく使われる傾向にある。In particular, method (c) tends to be used more often.
しかし、第５図のサージ保護回路１１．１２．１３に第
６図（ｅ）方式を採用した場合、 サージ保護回路１１
．１２については常時電圧が印加される回路なので、放
電時の続流防止、バリスタの特性劣化防止の観点より非
常に有効であるが、サージ保護回路１３に関しては、常
時ＢとＦＧが同電位で放電時の続流が発生しない為、第
６図（ｅ）方式を採用するメリットがない。However, if the method shown in Fig. 6(e) is adopted for the surge protection circuit 11.12.13 in Fig. 5, the surge protection circuit 11
．． 12 is a circuit to which voltage is always applied, so it is very effective from the viewpoint of preventing follow-on current during discharge and preventing deterioration of varistor characteristics.However, regarding surge protection circuit 13, B and FG are always discharged at the same potential. Since no follow-on flow of time occurs, there is no advantage in adopting the method shown in FIG. 6(e).
又、サージ保護回路は、第５図に示す如く屋外機器への
入力電源に対し３組であり、配電線の柱上に設置される
機器に装備するには小形化が必要である。したがって、
サージ保護回路の小形化を考え、第６図（ａ）方式のア
レスタとしてもよいが、インパルス放電開始電圧が高い
欠点がある。Furthermore, as shown in FIG. 5, there are three sets of surge protection circuits for input power to outdoor equipment, and they must be miniaturized to be installed in equipment installed on distribution line poles. therefore,
Considering the miniaturization of the surge protection circuit, an arrester of the type shown in FIG. 6(a) may be used, but it has the disadvantage of a high impulse discharge starting voltage.
雷サージをできるだけ抑制する為なら、第６図（ｂ）方
式としてもよいが、前述した様に雷サージ電流による特
性劣化が起り易いので、耐量の大きなバリスタが必要と
なり、形状が大形となる欠点がある。In order to suppress lightning surges as much as possible, the method shown in Fig. 6 (b) may be used, but as mentioned above, characteristics are likely to deteriorate due to lightning surge currents, so a varistor with a large withstand capacity is required, and the shape becomes large. There are drawbacks.
よって本発明は、小形化でき屋内外の電子機器のフレー
ムグランドと入力電源の接地側どの間のサージ保護とし
て、サージ抑制性能がよく、かつ特性劣化が起りにくい
サージ保護回路を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a surge protection circuit that can be miniaturized, has good surge suppression performance, and is less prone to characteristic deterioration, as surge protection between the frame ground of indoor and outdoor electronic equipment and the ground side of an input power source. shall be.
（課題を解決するための手段）
第１−の本発明は、屋内外の電子機器のフレームグラン
ドと、入力電源の接地側との間のサージ保護として、
第１図の様にアレスタ１４ａとバリスタ１４ｂを並列に
し、 かつその特性が雷サージ電流が流九た時、アレス
タの（放電開始電圧）＜（バリスタの制限電圧）となる
様なものとすることにより、サージ抑制性能がよく、か
つ特性劣化が起りにくいサージ保護回路とするものであ
る。(Means for Solving the Problems) The first aspect of the present invention provides surge protection between the frame ground of indoor and outdoor electronic equipment and the ground side of an input power source.
As shown in Figure 1, the arrester 14a and varistor 14b are connected in parallel, and their characteristics are such that when a lightning surge current flows, (discharge starting voltage of the arrester) < (limiting voltage of the varistor). This provides a surge protection circuit that has good surge suppression performance and is less prone to characteristic deterioration.
第２の本発明は従来バリスタとアレスタを直列に組合せ
たサージ保護が１人力電源当り３組必要とするところを
第２図の様に３極アレスタ１４８′の中間極とバリスタ
Ｌ４ｂ’を直列にし、バリスタ１４ｂ′の片方を入力電
源の非接地側Ａへ、３極アレスタ１４８′の片極を入力
電源の接地側Ｂへ接続し、他極を屋外機器１のフレーム
グランドＦＧへ接続できる様にした１組のサージ保護と
従来より使われているサージ保護１組を入力電源の接地
側Ｂと屋外機器１のフレームグランドＦＧ間に挿入する
ことにより２組のサージ保護ですむ様に構成するもので
ある。The second invention replaces the conventional surge protection system in which a varistor and an arrester are combined in series, requiring three sets per one power supply, by connecting the intermediate pole of the three-pole arrester 148' and the varistor L4b' in series, as shown in FIG. , one side of the varistor 14b' is connected to the non-ground side A of the input power supply, one pole of the three-pole arrester 148' is connected to the ground side B of the input power supply, and the other pole is connected to the frame ground FG of the outdoor equipment 1. By inserting one set of surge protection and one set of conventional surge protection between the ground side B of the input power supply and the frame ground FG of outdoor equipment 1, only two sets of surge protection are required. It is.
（作 用） 第１の発見について、作用を述べる。(for production) The effect of the first discovery will be described.
アレスタ１４ａとバリスタ１４ｂを並列とすることによ
り、サージ保護特性は第３図に於いて、雷インパルス電
圧（ａ）印加し始め制限電圧は、バリスタの点線カーブ
の特性で抑えられるが、雷インパルス電圧の立上りによ
る電流の増加に伴ない、制限電圧が高くなる。しかし、
アレスタの放電開始電圧（Ｅａ）（インパルスより立上
りが少し遅い場合の電圧が印加された時に放電を開始す
る電圧値）を越えると、アレスタが放電しアレスタの制
限電圧（Ｅｏ）に抑える。この状態ではアレスタに電流
が流れ、アレスタの制限電圧（Ｅ、）がバリスタの制限
電圧より低い為、バリスタ側には殆んど電流が流れなく
なる。By connecting the arrester 14a and the varistor 14b in parallel, the surge protection characteristics are as shown in FIG. As the current increases due to the rise of the current, the limiting voltage increases. but,
When the discharge starting voltage (Ea) of the arrester is exceeded (the voltage value at which discharge starts when a voltage that rises slightly slower than the impulse is applied), the arrester discharges and suppresses the voltage to the limit voltage (Eo) of the arrester. In this state, current flows to the arrester, and since the arrester's limiting voltage (E,) is lower than the varistor's limiting voltage, almost no current flows to the varistor side.
この為、雷サージ侵入の場合、バリスタには最初の短時
間のみ雷サージ電流が流れるのみで、その後雷サージが
消滅する迄はアレスタ側を流れるので、バリスタとして
は雷サージ電流が流れる時間が短い分特性劣化が起りに
くくなる。又、サージ抑制性能は、第３図の点線から一
点鎖線に続くカーブとなり、将来の第６図（ａ）、 （
ｂ）、 （ｃ）いずれを用いた場合よりも向上するもの
である。For this reason, in the case of a lightning surge, the lightning surge current only flows through the varistor for an initial short period of time, and then flows through the arrester side until the lightning surge disappears, so the time for the lightning surge current to flow is short for the varistor. characteristic deterioration is less likely to occur. In addition, the surge suppression performance is a curve that continues from the dotted line in Figure 3 to the dashed-dotted line, and will be the same in the future as shown in Figure 6 (a).
This is an improvement over using either b) or (c).
次に第２の発明について、作用を述べる。Next, the operation of the second invention will be described.
第２図の様に構成されたものに於いては雷サージが入力
電源の線間、あるいは入力電源と大地間に侵入してきた
場合のいずれでもサージ保護としては有効に働くもので
ある。The structure shown in FIG. 2 works effectively as surge protection even when lightning surges enter between the lines of the input power source or between the input power source and the ground.
（実施例）
第１図は第１の発明の一実施例で、２は柱上トランス、
Ｅｌは柱上トランス２次側の第２種接地。(Embodiment) Fig. 1 shows an embodiment of the first invention, and 2 is a pole-mounted transformer;
El is the second type grounding on the secondary side of the pole transformer.
１は屋外機器、１０は雷サージより保護する電子回路、
Ａは柱上トランスの非接地側、Ｂは柱上トランスの接地
側、ＦＧは屋外機器１のフレームグランド、１４はアレ
スタ１４ａとバリスタ１４ｂを並列にしたサージ保護回
路で、ＢとＦＧ間に接続する。 １１．１２は従来より
使われているサージ保護回路である。1 is outdoor equipment, 10 is an electronic circuit that protects from lightning surges,
A is the non-grounding side of the pole transformer, B is the grounding side of the pole transformer, FG is the frame ground of outdoor equipment 1, 14 is a surge protection circuit with arrester 14a and varistor 14b in parallel, connected between B and FG. do. 11 and 12 are conventionally used surge protection circuits.
外部より雷サージが入力電源のＡ、Ｂ線間に侵入すると
、サージ保護回路１１でＡ、８間のサージ電圧を抑制す
る。又、柱上トランス２とこの２次側接地のＥ１間に雷
サージが侵入した場合は、サージ保護回路１２でＡ−Ｅ
□間のサージ電圧を抑制する３雷サージ電流が柱上トラ
ンス２の２次側接地Ｅ１に流れ、Ｂ−ＦＧ間にサージ電
圧が出た場合、サージ電圧の立上りはバリスタ１４ｂで
抑制し、サージ電流が流れることにより、バリスタ１４
ｂの制限電圧が立上って行くのをアレスタ１４ａで抑制
する。When a lightning surge from the outside enters between the A and B lines of the input power source, the surge protection circuit 11 suppresses the surge voltage between A and 8. In addition, if a lightning surge enters between the pole transformer 2 and this secondary side grounding E1, the surge protection circuit 12 will shut down A-E.
3. Suppress the surge voltage between Due to the current flowing, the varistor 14
The arrester 14a suppresses the rise of the limit voltage b.
Ｂ−ＦＧＩ’！ｊｌは平常状態に於いては同電位の為１
Ｍサージ消滅後アレスタ１４ａが続流することはない。B-FGI'! jl is 1 because it has the same potential under normal conditions.
After the M surge disappears, the arrester 14a does not follow.
又、バリスタ１４ｂには、アレスタ１４ａが放電に至る
迄の短時間のみ雷サージが加わるが、時間が短い分バリ
スタ１４ｂの発熱が抑えられ、 この為、特性劣化が起
りにくくなる。Further, although the lightning surge is applied to the varistor 14b only for a short period of time until the arrester 14a is discharged, heat generation in the varistor 14b is suppressed due to the short time, and therefore, characteristic deterioration is less likely to occur.
以上説明した様に本実施例によれば、電子機器のフレー
ムグランドと引込電源の接地間のサージ保護として、サ
ージ抑制性能がよく、かつ特性劣化が起りにくいサージ
保護回路を提供できる。As described above, according to this embodiment, it is possible to provide a surge protection circuit that has good surge suppression performance and is less prone to characteristic deterioration, as surge protection between the frame ground of an electronic device and the ground of a power supply.
次に第２の発明の一実施例を説明する。Next, an embodiment of the second invention will be described.
第２図は、第２の発明の一実施例であり、２は柱上トラ
ンス、Ｅ、は柱上トランス２次側の第２種接地、１は屋
外機器、１０は雷サージより保護する電子回路、Ａは柱
上トランスの非接地側、Ｂは柱上トランスの接地側、Ｆ
Ｇは屋外機器１のフレームグランド、１４’はサージ保
護で１４ａ’は３極アレスタ、１４ｂ′はバリスタ、１
３は従来より使われているサージ保護で、サージ保護回
路１４′は３極アレスタ１４８′の中間極とバリスタ１
４８′を直列とじバリスタの他端を電源の非接地側Ａへ
、３極アレスタ１４δ′の片極を電源の接地側Ｂへ他極
を屋外機器のフレームグランドＦＧへ接続する様に構成
する。Fig. 2 shows an embodiment of the second invention, where 2 is a pole transformer, E is a type 2 grounding on the secondary side of the pole transformer, 1 is outdoor equipment, and 10 is an electronic device for protecting against lightning surges. Circuit, A is the non-grounding side of the pole transformer, B is the grounding side of the pole transformer, F
G is the frame ground of outdoor equipment 1, 14' is surge protection, 14a' is a 3-pole arrester, 14b' is a varistor, 1
3 is the conventional surge protection, and the surge protection circuit 14' connects the intermediate pole of the 3-pole arrester 148' and the varistor 1.
48' are connected in series, the other end of the varistor is connected to the non-ground side A of the power supply, one pole of the three-pole arrester 14δ' is connected to the ground side B of the power supply, and the other pole is connected to the frame ground FG of the outdoor equipment.
列部より雷サージが入力電源のＡ、Ｂ線間に侵入すると
バリスタ１４ｂ′と３極アレスタ１４ａ′のＢ側接続の
回路で放電しＡ、８間の電圧を抑制する。When a lightning surge enters between the A and B lines of the input power source from the column section, it is discharged in the circuit connected to the B side of the varistor 14b' and the 3-pole arrester 14a', suppressing the voltage between A and 8.
又柱トランス２とこの２次側接地のＥ１間に雷サージが
侵入した場合は、バリスタ１４ｂ′と３極アレスタ１４
８′のＦＧ側接続の回路で放電しＡ−１間の電圧を抑制
する。In addition, if a lightning surge enters between the pillar transformer 2 and this secondary side grounding E1, the varistor 14b' and the three-pole arrester 14
8' is discharged in the circuit connected to the FG side, and the voltage between A-1 is suppressed.
雷サージ電流が柱上トランス２の２次側接地Ｅ。The lightning surge current is connected to the secondary side grounding E of the pole transformer 2.
に流れＢとＦＧ間にサージ電圧が出た場合は、サージ保
護１３で放電し、電圧を抑制する。If a surge voltage occurs between B and FG, the surge protection 13 discharges and suppresses the voltage.
この時侵入サージが急峻でサージ保護１３での放電電圧
が高ければ３極アレスタも放電するが雷サージは一過性
でありすぐＢとＦＧが同電位となる為続流しや断は問題
なく行われるものである。At this time, if the intruding surge is steep and the discharge voltage at the surge protection 13 is high, the 3-pole arrester will also be discharged, but the lightning surge is temporary and B and FG will soon be at the same potential, so continuity and disconnection will occur without any problem. It is something that can be done.
以上説明した様に本実施例によ九ば２組のサージ保護回
路で従来と同等のサージ保護性能を有する事より屋外機
器の小形化に役立つと同時に部品点数が少ない為信頼度
も向上するものである。As explained above, this embodiment has the same surge protection performance as the conventional one with two sets of surge protection circuits, which helps to reduce the size of outdoor equipment, and at the same time improves reliability because the number of parts is small. It is.
以上迄説明した内容では屋外機器のサージ保護回路とし
て説明したが屋内機器のサージ保護回路としても使える
ものである。又、第２図に於いて、Ｂ−ＦＧ間が３極ア
レスタの放電抑制で十分な場合は、サージ保護１３は不
要なものである。Although the above description has been made as a surge protection circuit for outdoor equipment, it can also be used as a surge protection circuit for indoor equipment. In addition, in FIG. 2, if the discharge suppression of the three-pole arrester is sufficient between B and FG, the surge protection 13 is unnecessary.
本発明によれば小形化してもかつサージ抑制性能がよい
サージ保護回路を得ることができる。According to the present invention, it is possible to obtain a surge protection circuit that is miniaturized and has good surge suppression performance.
第１図は第１の発明のサージ保護回路を備えた屋外機器
構成図、第２図は第２の発明のサージ保護回路を備えた
屋外機器構成図、第３図は第１の発明のサージ吸収素子
の特性図、 −−ラ１黴清キ哨嘲考訓ｆ羽４樅
魂博孝ｙボ卓１−禰ｍ母第４図は各サージ吸収素子の特
性図、第５図は従来のサージ保護回路を備えた屋外機器
構成図、第６図は従来のサージ保護素子の構成図、
１・・・屋外（内）機器 ２・・・柱上（・ランス１
０・・・電気回路
１１〜１４．１４’・・・サージ保護回路１４ａ、 １
４ａ”＝アレスタ １４ｂ、 １４ｂ’−＝バリスタ
ｅ・・・雷インパルス電圧カーブ（雷サージ電圧）Ｅ８
・・・アレスタのインパルス放電開始電圧Ｅ、・・・ア
レスタの放電開始電圧
ｅ、・・・アレスタの制限電圧カーブ
ｃｏ・・・バリスタの制限電圧カーブ
代理人 弁理士 則 近 憲 佑
同 第子丸 健
第１図
第２図
呻を
第３図
→を
第４図
第５図
第６図Fig. 1 is a block diagram of outdoor equipment equipped with the surge protection circuit of the first invention, Fig. 2 is a block diagram of outdoor equipment equipped with the surge protection circuit of the second invention, and Fig. 3 is a block diagram of the outdoor equipment equipped with the surge protection circuit of the first invention. Characteristic diagrams of the absorption elements, --RA 1 Mold cleaning test and mock study f UW 4 Mortama Hirotaka y Bo Taku 1 - Nem Mother Figure 4 is the characteristic diagram of each surge absorption element, Figure 5 is the conventional surge absorbing element. A configuration diagram of outdoor equipment equipped with a protection circuit. Figure 6 is a configuration diagram of a conventional surge protection element.
0...Electric circuit 11-14.14'...Surge protection circuit 14a, 1
4a''=arrestor 14b, 14b'-=varistor e...Lightning impulse voltage curve (lightning surge voltage) E8
...Arrestor's impulse discharge starting voltage E,...Arrester's discharge starting voltage e,...Arrester's limiting voltage curve co...Varistor's limiting voltage curve Agent Patent attorney Noriyuki Chika Yudo Daishimaru Figure 1 Figure 2 Moaning Figure 3 → Figure 4 Figure 5 Figure 6
Claims (3)
に備えるサージ保護回路において、前記入力電源の接地
側と前記機器のフレームグランド間にギャップ付アレス
タと非線形素子のギャップレスバリスタとを並列に接続
することを特徴とするサージ保護回路。(1) In a surge protection circuit for a device whose input power source is a power source with one wire grounded, a gap arrester and a gapless varistor as a nonlinear element are connected in parallel between the ground side of the input power source and the frame ground of the device. A surge protection circuit characterized by being connected to.
電圧をバリスタの制御電圧より小さくすることを特徴と
する請求項第１項記載のサージ保護回路。(2) The surge protection circuit according to claim 1, wherein when a lightning surge current flows, the discharge start voltage of the arrester is made smaller than the control voltage of the varistor.
に備えるサージ保護回路において、前記入力電源の非接
地側に非線形素子のギャップレスバリスタとギャップ付
３極アレスタの中間極を直列に接続し、前記ギャップ付
３極アレスタの片極を前記入力電源の接地側に接続し、
このギャップ付３極アレスタの他極を前記機器のフレー
ムグランドに接続することを特徴とするサージ保護回路
。(3) In a surge protection circuit for a device whose input power source is a power source whose one wire is grounded, a gapless varistor, which is a nonlinear element, and an intermediate pole of a three-pole arrester with a gap are connected in series to the non-grounded side of the input power source. and connecting one pole of the three-pole arrester with a gap to the ground side of the input power supply,
A surge protection circuit characterized in that the other pole of the three-pole arrester with a gap is connected to the frame ground of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63138446A JP2549149B2 (en) | 1988-06-07 | 1988-06-07 | Surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63138446A JP2549149B2 (en) | 1988-06-07 | 1988-06-07 | Surge protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01311822A true JPH01311822A (en) | 1989-12-15 |
| JP2549149B2 JP2549149B2 (en) | 1996-10-30 |
Family
ID=15222193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63138446A Expired - Lifetime JP2549149B2 (en) | 1988-06-07 | 1988-06-07 | Surge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2549149B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010153747A (en) * | 2008-12-26 | 2010-07-08 | Ae Tekku Kk | Protection circuit and lighting device |
| JP2011181877A (en) * | 2010-03-03 | 2011-09-15 | M-System Co Ltd | Lightning arrester |
| CN105429122A (en) * | 2015-11-16 | 2016-03-23 | 国网山东省电力公司济宁供电公司 | Non-polar RS485 protective adapter circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61110985A (en) * | 1984-11-06 | 1986-05-29 | 松下電器産業株式会社 | Surge absorber |
-
1988
- 1988-06-07 JP JP63138446A patent/JP2549149B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61110985A (en) * | 1984-11-06 | 1986-05-29 | 松下電器産業株式会社 | Surge absorber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010153747A (en) * | 2008-12-26 | 2010-07-08 | Ae Tekku Kk | Protection circuit and lighting device |
| JP2011181877A (en) * | 2010-03-03 | 2011-09-15 | M-System Co Ltd | Lightning arrester |
| CN105429122A (en) * | 2015-11-16 | 2016-03-23 | 国网山东省电力公司济宁供电公司 | Non-polar RS485 protective adapter circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2549149B2 (en) | 1996-10-30 |
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