JP2890466B2 - Lightning proof terminal block - Google Patents
Lightning proof terminal blockInfo
- Publication number
- JP2890466B2 JP2890466B2 JP1126988A JP12698889A JP2890466B2 JP 2890466 B2 JP2890466 B2 JP 2890466B2 JP 1126988 A JP1126988 A JP 1126988A JP 12698889 A JP12698889 A JP 12698889A JP 2890466 B2 JP2890466 B2 JP 2890466B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal block
- lightning
- electrical connection
- intermediate electrode
- connection terminals
- 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
Landscapes
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は雷サージを始めとする異常電圧に対して、大
きな耐力を有する耐雷端子台に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning-resistant terminal block having a large resistance to an abnormal voltage such as a lightning surge.
従来の技術 近年、電力分野において、電力の安定供給の要望が以
前にも増して高まり、電力設備機器の高信頼化ならびに
電力の高品質化が進められている。特に、電力の高品質
化は、送配電線上に雷などによって発生する有害な異常
電圧を確実に吸収，抑制するために、通常、ギャップを
もたない酸化亜鉛系の避雷器も実用化され、送配電線設
備の各所に取り付けられている。2. Description of the Related Art In recent years, in the electric power field, a demand for stable supply of electric power has increased more than before, and high reliability of electric power equipment and high quality of electric power have been promoted. In particular, to improve the quality of electric power, zinc oxide surge arresters with no gaps are usually put into practical use in order to reliably absorb and suppress harmful abnormal voltages generated by lightning on transmission and distribution lines. It is installed in various parts of distribution line facilities.
しかしながら、AC100V,AC200Vなどの低圧配電線にお
けるサージ電圧の対策は近年開始したばかりで、依然と
して数KV以上のサージ電圧が電力量計や家電機器に侵入
しており、機器側での耐雷対策が必要とされていた。特
に、電力量計を始めとする各種機器の電気接続のための
端子台付近において、雷害を受ける場合が多く、耐雷性
能の高い端子台が要望されていた。However, surge voltage countermeasures for low-voltage distribution lines, such as AC100V and AC200V, have only recently begun, and surge voltages of several KV or more still penetrate into watt-hour meters and home electric appliances. And it was. In particular, in the vicinity of a terminal block for electrical connection of various devices such as a watt hour meter, lightning damage is often caused, and a terminal block having high lightning resistance has been demanded.
従来、この種の端子台の構造は第３図および第４図に
示すような構成であった。第３図は端子台の斜視図で、
説明不要部分は省略している。また、第４図は端子台の
電気回路図を示したものである。第４図，第５図におい
て、1a,1b,1cは電気接続端子で、外部よりの電線が接続
され、内部回路に電気もしくは信号が供給される。この
図では３回路の例を示す。上記電気接続端子1a,1b,1cは
銅や銅合金で作られた電気良導体である。２は極間（回
路間）の絶縁を確保するための極間絶縁板で、各極間に
設けられ、通常エポキシ樹脂，フェノール樹脂などが用
いられる。3a,3b,3cは同様に各回路のアース間絶縁を確
保するためのアース間絶縁部で、各アース間に設けら
れ、極間絶縁板２と同様な材料で構成されている。４は
電気接続端子1a,1b,1c上のビスで、外部よりの電線取付
け時に用いるものである。５は端子台が取付けられる取
付盤で、通常は金属製のものが用いられる。Conventionally, the structure of this type of terminal block has a configuration as shown in FIGS. FIG. 3 is a perspective view of the terminal block.
Unnecessary parts are omitted. FIG. 4 shows an electric circuit diagram of the terminal block. In FIGS. 4 and 5, reference numerals 1a, 1b, and 1c denote electrical connection terminals to which electric wires from the outside are connected, and electricity or signals are supplied to internal circuits. This figure shows an example of three circuits. The electric connection terminals 1a, 1b, 1c are good electric conductors made of copper or copper alloy. Reference numeral 2 denotes a pole insulating plate for ensuring insulation between the poles (between circuits), which is provided between the poles and is usually made of an epoxy resin, a phenol resin or the like. Similarly, reference numerals 3a, 3b, and 3c denote ground-to-ground insulating portions for ensuring the ground-to-ground insulation of the respective circuits, which are provided between the grounds and are made of the same material as the inter-electrode insulating plate 2. Reference numeral 4 denotes screws on the electric connection terminals 1a, 1b, and 1c, which are used when attaching electric wires from outside. Reference numeral 5 denotes a mounting board to which a terminal block is mounted, which is usually made of metal.
以上のように構成された従来の端子台の動作を以下に
説明する。今、外部から電気接続端子1a,1b,1cに接続さ
れた電線の電力あるいは信号はサージ電圧によって極間
あるいはアース間に放電を生じなければ、何等支障なく
内部回路に導かれ、所望の特性を示すものである。The operation of the conventional terminal block configured as described above will be described below. Now, the power or signal of the wires connected to the electrical connection terminals 1a, 1b, 1c from the outside is guided to the internal circuit without any trouble unless the surge voltage causes a discharge between the poles or between the grounds, and the desired characteristics are obtained. It is shown.
発明が解決しようとする課題 しかしながら、このような従来の構成では、例えば電
気接続端子1a,1cに外部より雷サージ電圧が侵入してき
た時、そのサージ電圧がアース間絶縁部3a,3cの耐圧を
超えた場合、第４図に示すようにそれぞれアーク
（イ），アーク（ロ）となって、取付盤５へ放電を生じ
る。この時、取付盤５を介して電気接続端子1a,.1cは短
絡を生じ、その後のAC100Vの続流によって端子台は，焼
損するといった問題がある。However, in such a conventional configuration, for example, when a lightning surge voltage enters the electrical connection terminals 1a and 1c from the outside, the surge voltage reduces the withstand voltage of the inter-ground insulating portions 3a and 3c. If it exceeds, the arc (a) and the arc (b) are respectively formed as shown in FIG. At this time, there is a problem in that the electrical connection terminals 1a, .1c are short-circuited via the mounting board 5, and the terminal block is burned by the subsequent flow of 100V AC.
本発明は、このような課題を解決しようとするもの
で、電気接続端子と取付盤との間に中間電極を配し、電
気接続端子と中間電極間にバリスタを接続し、続流を遮
断しようとするものである。The present invention is intended to solve such a problem, and arranges an intermediate electrode between an electric connection terminal and a mounting board, connects a varistor between the electric connection terminal and the intermediate electrode, and cuts off a subsequent flow. It is assumed that.
課題を解決するための手段 この目的を達成するために、本発明の耐雷端子台は、
少なくとも一個の電気接続端子と、この電気接続端子の
アース間あるいはアース間と極間の両方に非アース側を
接続したバリスタと、このバリスアのアース側に接続し
た中間電極とを備えた耐雷端子台において、前記中間電
極は、前記電気接続端子からこの耐雷端子台を取付ける
取付盤へ放電する経路に位置するとともに、前記取付盤
とは電気的非接続の状態としたものである。Means for Solving the Problems In order to achieve this object, a lightning-resistant terminal block of the present invention comprises:
A lightning proof terminal block comprising at least one electrical connection terminal, a varistor having a non-ground side connected between the ground of the electrical connection terminal or between the ground and the pole, and an intermediate electrode connected to the ground side of the varistor. , The intermediate electrode is located on a path for discharging from the electrical connection terminal to a mounting board on which the lightning-resistant terminal block is mounted, and is electrically disconnected from the mounting board.
作用 この構成によると、バリスタと、中間電極と取り付け
の間に設けた空間が放電ギャップとして作用し、バリス
タとこの放電ギャップとの二種類のサージ吸収手段を直
列に接続した構造をとることにより、電気接続端子から
極間あるいはアース間に生じる放電は、前記空間、次い
でバリスタを介してから取付盤に放電されるので続流が
防止でき、異極間短絡などによる耐雷端子台の破壊や焼
損を防止できる。Action According to this configuration, the varistor, the space provided between the intermediate electrode and the mounting acts as a discharge gap, and a structure in which two types of surge absorbing means of the varistor and the discharge gap are connected in series, Discharges generated between the electrical connection terminals and between the poles or the ground are discharged to the mounting board after passing through the space and then through the varistor, so that the continuation flow can be prevented, and the destruction or burning of the lightning-resistant terminal block due to a short circuit between different poles or the like can be prevented. Can be prevented.
また中間電極と取付盤とが電気的に非接続の状態であ
るため、定常状態においてバリスタの漏れ電流や周波数
特性の影響を耐雷端子台を接続する機器に及ぼさない。Further, since the intermediate electrode and the mounting board are not electrically connected, the influence of the leakage current and the frequency characteristics of the varistor does not affect the equipment connected to the lightning-resistant terminal block in the steady state.
実施例 以下、本発明の一実施例について図面を参照しながら
説明する。第１図および第２図は本発明の耐雷端子台の
一実施例を示したものである。第１図は本発明の耐雷端
子台の斜視図で、説明不要部分は省略している。また、
第２図は耐雷端子台の電気回路図を示したものである。
第１図および第２図において、6a,6b,6cは電気接続端
子、７は極間絶縁盤、8a,8b,8cはアース間絶縁部、９は
ビス、10は取付盤で、これらはそれぞれ従来の端子台の
電気接続端子1a,1b,1c、極間絶縁盤２、アース間絶縁部
3a,3b,3c、ビス４、取付盤５に対応するものである。11
は中間電極で、電気接続端子6a,6b,6cと取付盤10との間
に位置し、１枚の金属板からなっている。同図では、中
間電極11は電気接続端子6a,6b,6cと取付盤10の中間にあ
り、電気接続端子6a,6b,6cから取付盤10へ放電する経路
に位置している。そして、電気接続端子6a,6b,6cと中間
電極11との間には、アース側一括としてバリスタ12a,12
b,12cが接続されている。このバリスタ12a,12b,12cはア
ース間絶縁部8a,8b,8c内にモールドされるか、あるいは
それらの空間に収納されている。また、バリスタ12a,12
b,12cは酸化亜鉛を主原料としたセラミックバリスタ
で、良好なサージ電流耐量と電圧非直線特性を有してい
る。さらに、これらバリスタ12a,12b,12cは回路電圧あ
るいは耐圧試験電圧に対して充分高い動作開始電圧に設
定されている。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show an embodiment of a lightning-resistant terminal block according to the present invention. FIG. 1 is a perspective view of a lightning-resistant terminal block according to the present invention, in which unnecessary parts are omitted. Also,
FIG. 2 shows an electric circuit diagram of the lightning-resistant terminal block.
In FIGS. 1 and 2, 6a, 6b, and 6c are electrical connection terminals, 7 is a pole insulating plate, 8a, 8b, and 8c are ground insulating portions, 9 is a screw, and 10 is a mounting plate. Conventional terminal block electrical connection terminals 1a, 1b, 1c, pole insulation board 2, ground insulation
It corresponds to 3a, 3b, 3c, screw 4, and mounting board 5. 11
Is an intermediate electrode, which is located between the electrical connection terminals 6a, 6b, 6c and the mounting board 10, and is made of one metal plate. In the figure, the intermediate electrode 11 is located between the electrical connection terminals 6a, 6b, 6c and the mounting board 10, and is located on a path for discharging from the electrical connection terminals 6a, 6b, 6c to the mounting board 10. And, between the electric connection terminals 6a, 6b, 6c and the intermediate electrode 11, varistors 12a, 12
b and 12c are connected. The varistors 12a, 12b, and 12c are molded in the inter-earth insulating portions 8a, 8b, and 8c, or are housed in their spaces. Also, the varistors 12a, 12
Reference numerals b and 12c denote ceramic varistors mainly made of zinc oxide, which have good surge current resistance and voltage non-linear characteristics. Further, these varistors 12a, 12b, 12c are set to an operation start voltage sufficiently higher than the circuit voltage or the withstand voltage test voltage.
次に、以上のように構成された耐雷端子台の動作を説
明する。今、従来例と同様に、例えば電気接続端子6a,6
cにサージ電圧が印加された場合、電気接続端子6a,6cは
取付盤10に対して放電を生じようとする。しかしなが
ら、中間電極11が放電を生じようとする経路にあり、ま
た電気接続端子6a,6cと中間電極11の間にはバリスタ12
a,12cがあり、そこに電圧依存性抵抗特性があるため、
従来のような気中アーク放電は電気接続端子6a,6cと中
間電極11との間では発生せず、中間電極11と取付盤10と
の間のみで発生する。すなわち、放電は電気接続端子6
a,6c→バリスタ12a,12c→中間電極11→取付盤10のルー
トで行われ、気中アークとなるのは中間電極11→取付盤
10のみである。そして、電気接続端子6a,6cと中間電極1
1との間はバリスタ12a,12cで回路電圧以上に電圧が確保
されているため、また中間電極11と取付盤10との間の放
電は電気接続端子6a,6cから十分離れているため、何等
続流の発生には寄与しない。もちろん異極間短絡も発生
することもない。そのため端子台の続流や異極間短絡に
よる破壊や焼損はまったく発生しない。また、端子台部
で危険な電圧を放電してしまえば耐雷端子台以降の回路
には大きなサージ電圧が印加されないという効果も兼ね
備えている。Next, the operation of the lightning-resistant terminal block configured as described above will be described. Now, as in the conventional example, for example, the electrical connection terminals 6a, 6
When a surge voltage is applied to c, the electrical connection terminals 6a and 6c tend to cause discharge to the mounting panel 10. However, the intermediate electrode 11 is on the path where a discharge is to occur, and the varistor 12 is located between the electrical connection terminals 6a, 6c and the intermediate electrode 11.
a, 12c, which has voltage-dependent resistance characteristics,
The conventional air arc discharge does not occur between the electrical connection terminals 6a, 6c and the intermediate electrode 11, but occurs only between the intermediate electrode 11 and the mounting plate 10. In other words, the electric discharge
a, 6c → varistors 12a, 12c → intermediate electrode 11 → mounting board 10
Only 10 Then, the electrical connection terminals 6a, 6c and the intermediate electrode 1
Since the varistors 12a and 12c maintain a voltage higher than the circuit voltage between them, the discharge between the intermediate electrode 11 and the mounting plate 10 is sufficiently away from the electrical connection terminals 6a and 6c. It does not contribute to the generation of follow-on current. Of course, no short circuit between different poles occurs. Therefore, there is no destruction or burning due to the terminal current flow or short circuit between different poles. Further, when a dangerous voltage is discharged at the terminal block, a large surge voltage is not applied to circuits subsequent to the lightning-resistant terminal block.
なお、実施例では電気接続端子を３個としたが、これ
は端子数を限定するものではない。また、実施例ではバ
リスタをアース間のみに設けた場合の例を示したが、ア
ース間，極間の両者に接続されていても上記した効果は
同様であるが、両者適用の場合は、極間サージにも強い
耐雷端子台が提供できるものである。また、実施例では
中間電極を１枚ものとしたが、電気接続端子毎に中間電
極を設けても同様な効果が得られることはいうまでもな
い。さらに、取付盤は必ずしも金属製に限定するもので
はなく、木製であってもよい。In the embodiment, three electric connection terminals are used, but this does not limit the number of terminals. Further, in the embodiment, an example in which the varistor is provided only between the grounds is shown. However, the same effect can be obtained even if the varistor is connected between the ground and the pole. It is possible to provide a lightning-resistant terminal block that is resistant to inter-surge. In the embodiment, one intermediate electrode is used. However, it goes without saying that a similar effect can be obtained even if an intermediate electrode is provided for each electric connection terminal. Furthermore, the mounting plate is not necessarily limited to metal, but may be wooden.
発明の効果 以上本発明によると、中間電極と取り付けの間に設け
た空間とが放電ギャップとして作用し、バリスタとこの
放電ギャップの二種類のサージ吸収手段を直列に接続し
た構造をとることにより、電気接続端子から極間あるい
はアース間に生じる放電は、前記空間、次いでバリスタ
を介してから取付盤に放電されるので続流が防止でき、
異極間短絡などによる耐雷端子台の破壊や焼損を防止で
きる。According to the present invention as described above, the space provided between the intermediate electrode and the mounting acts as a discharge gap, by taking a structure in which a varistor and two types of surge absorbing means of this discharge gap are connected in series, Discharges generated between the electrical connection terminals and between the poles or the ground are discharged to the mounting board after passing through the space, and then through the varistor, so that a subsequent flow can be prevented,
Destruction and burning of the lightning proof terminal block due to short circuit between different poles can be prevented.
また中間電極と取付盤とが電気的に非接続の状態であ
るため、定常状態においてバリスタの漏れ電流や周波数
特性の影響を耐雷端子台を接続する機器に及ぼさない。Further, since the intermediate electrode and the mounting board are not electrically connected, the influence of the leakage current and the frequency characteristics of the varistor does not affect the equipment connected to the lightning-resistant terminal block in the steady state.
第１図は本発明の一実施例による耐雷端子台を示す要部
斜視図、第２図は同電気回路図、第３図は従来の端子台
を示す要部斜視図、第４図は同電気回路図である。 6a,6b,6c……電気接続端子、７……極間絶縁部、8a,8b,
8c……アース間絶縁部、９……ビス、10……取付盤、11
……中間電極、12a,12b,12c……バリスタ。FIG. 1 is a perspective view of a main part showing a lightning-resistant terminal block according to an embodiment of the present invention, FIG. 2 is an electric circuit diagram thereof, FIG. 3 is a perspective view of a main part showing a conventional terminal block, and FIG. It is an electric circuit diagram. 6a, 6b, 6c: electric connection terminal, 7: inter-electrode insulating part, 8a, 8b,
8c: Insulation between ground, 9: Screw, 10: Mounting panel, 11
…… Intermediate electrodes, 12a, 12b, 12c …… Varistors.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01R 9/00 H01R 9/15 - 9/28 H01C 7/12 H02H 9/04 Continuation of front page (58) Fields investigated (Int.Cl. 6 , DB name) H01R 9/00 H01R 9/15-9/28 H01C 7/12 H02H 9/04
Claims (1)
気接続端子のアース間あるいはアース間と極間の両方に
非アース側を接続したバリスタと、このバリスタのアー
ス側に接続した中間電極とを備えた耐雷端子台におい
て、前記中間電極は、前記電気接続端子からこの耐雷端
子台を取付ける取付板へ放電する経路に位置するととも
に、前記取付板とは電気的非接続の状態とした耐雷端子
台。At least one electrical connection terminal, a varistor having a non-ground side connected between the grounds of the electrical connection terminals or between the ground and the pole, and an intermediate electrode connected to the ground side of the varistor. In the lightning-resistant terminal block provided, the intermediate electrode is located on a path for discharging from the electric connection terminal to a mounting plate for mounting the lightning-resistant terminal block, and is electrically disconnected from the mounting plate. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126988A JP2890466B2 (en) | 1989-05-19 | 1989-05-19 | Lightning proof terminal block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126988A JP2890466B2 (en) | 1989-05-19 | 1989-05-19 | Lightning proof terminal block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02306556A JPH02306556A (en) | 1990-12-19 |
| JP2890466B2 true JP2890466B2 (en) | 1999-05-17 |
Family
ID=14948878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1126988A Expired - Fee Related JP2890466B2 (en) | 1989-05-19 | 1989-05-19 | Lightning proof terminal block |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2890466B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9000672B2 (en) | 2011-04-26 | 2015-04-07 | Koninklijkle Philips N.V. | Connector with surge protection structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153536U (en) * | 1982-04-07 | 1983-10-14 | 株式会社サンテツク | Protective device for communication equipment |
| JPH0329889Y2 (en) * | 1987-05-30 | 1991-06-25 |
-
1989
- 1989-05-19 JP JP1126988A patent/JP2890466B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02306556A (en) | 1990-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5220480A (en) | Low voltage, high energy surge arrester for secondary applications | |
| CA2772219C (en) | Method and apparatus for protecting power systems from extraordinary electromagnetic pulses | |
| CA1137543A (en) | Line protector for a communication circuit | |
| US5053910A (en) | Surge suppressor for coaxial transmission line | |
| EP1305863B1 (en) | System for overvoltage protection | |
| US3631323A (en) | Surge-modifying lightning arrester construction | |
| JP2009219304A (en) | Lightning-resistant protective cap element, and method of protection against lightning strike surge with the element | |
| US4835650A (en) | Apparatus and method for minimizing the let-through voltage associated with circuits used in conjunction with electronic elements to suppress surges, transients and like electrical disturbances | |
| US6493201B1 (en) | Spark gap retrofit module for surge arrester | |
| IL211536A (en) | Method and apparatus for protecting power systems from extraordinary electromagnetic pulses | |
| CA2338566C (en) | Creeping discharge lightning arrestor | |
| JP2890466B2 (en) | Lightning proof terminal block | |
| JP2890462B2 (en) | Lightning proof terminal block | |
| JP2890467B2 (en) | Lightning proof terminal block | |
| JP4583642B2 (en) | Distribution board with lightning arrester | |
| JP2892870B2 (en) | Building grounding automatic switch | |
| US4987511A (en) | Gapped arrester | |
| CN111180153A (en) | Valve type lightning arrester with protection power device | |
| US20050068709A1 (en) | System for overvoltage protection | |
| CA1106912A (en) | Lightning arrester device for power transmission line | |
| US1311916A (en) | Lightning-akrester | |
| JP3835940B2 (en) | Lightning intrusion protection device in low voltage distribution system. | |
| JPH1050453A (en) | Circuit protection instrument and printed substrate | |
| JPH01309303A (en) | Tank-type lightning arrester and gas-insulated switchgear using it | |
| JP2002064932A (en) | Discharge circuit for electronic equipment and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |