JPH0331025Y2 - - Google Patents
Info
- Publication number
- JPH0331025Y2 JPH0331025Y2 JP4930585U JP4930585U JPH0331025Y2 JP H0331025 Y2 JPH0331025 Y2 JP H0331025Y2 JP 4930585 U JP4930585 U JP 4930585U JP 4930585 U JP4930585 U JP 4930585U JP H0331025 Y2 JPH0331025 Y2 JP H0331025Y2
- Authority
- JP
- Japan
- Prior art keywords
- lightning arrester
- surge
- ammeter
- display device
- leakage current
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、特に電力系統保護等に用いられる
避雷器の漏れ電流の計測およびサージ動作回数の
計数を行なう避雷器動作表示装置に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a lightning arrester operation display device that measures leakage current and counts the number of surge operations of a lightning arrester used particularly for power system protection.
第５図は、従来の避雷器動作表示装置を構成す
る漏れ電流計測部およびサージ動作計数部の回路
図である。図において、１は避雷器、２は避雷器
１に接続された漏れ電流計測部であり、スイツチ
３と、漏れ電流を表示する電流計４と、保護ギヤ
ツプ５との並列接続から成つている。６はサージ
に対する避雷器１の動作を計数するサージ動作計
数部であり、非直線抵抗素子R5と、コンデンサ
Ｃと、コイルＬを有し動作回数を表示するカウン
タ７との並列接続から成つている。これら漏れ電
流計測部２とサージ動作計数部６は直列接続さ
れ、避雷器１の低圧側と接地との間に挿入されて
いる。
FIG. 5 is a circuit diagram of a leakage current measuring section and a surge operation counting section that constitute a conventional lightning arrester operation display device. In the figure, 1 is a lightning arrester, and 2 is a leakage current measuring section connected to the lightning arrester 1, which consists of a switch 3, an ammeter 4 that displays the leakage current, and a protective gap 5 connected in parallel. Reference numeral 6 denotes a surge operation counter that counts the operation of the lightning arrester 1 in response to a surge, and is made up of a parallel connection of a nonlinear resistance element R5 , a capacitor C, and a counter 7 having a coil L and displaying the number of operations. . The leakage current measuring section 2 and the surge operation counting section 6 are connected in series and inserted between the low voltage side of the lightning arrester 1 and the ground.
次に動作について説明する。非直線抵抗特性の
優れた酸化亜鉛素子などを積み上げて構成した避
雷器１は、例えば、電力系統を過電圧サージから
保護するため、電力用避雷器として発変電所に設
置される。避雷器１には、連続使用電圧が常時加
わる他、襲雷時には大きな過電圧がかかるが、こ
の雷サージ電流を吸収して過電圧を一定レベルま
で抑制し、被保護機器を保護することが要求され
る。このような責務があるので電力用避雷器は定
期的に点検されるが通常実施される点検項目は主
に、連続使用電圧に対する微小な漏れ電流の計測
と、雷サージに対する動作回数のチエツクとであ
る。避雷器１の漏れ電流を計測する際は、連続使
用状態で常時閉じているスイツチ３を開き、電流
計４によつて連続使用電圧に対する電流を読む。
測定された漏れ電流が所定の範囲内にあるか否か
によつて、避雷器１が健全であるか否かを判定す
る。漏れ電流計測後は再びスイツチ３を閉じる。
一方、雷サージに対する避雷器１の動作回数をチ
エツクする際は、累積数が自動的にサージ動作計
数部６のカウンタ７に表示されるので、このカウ
ンタ表示によつて異常な回数の動作があるか否か
を確認する。サージ動作計数部６においては、襲
雷時に避雷器１に流れるサージ電流の電荷がコン
デンサＣに貯えられ、この電荷の放電エネルギー
によりカウンタ７が動作する。このときコンデン
サＣとカウンタ７との端子間に更に生じるサージ
電流による過電圧は、並列に接続された過電圧抑
制用の非直線抵抗素子R5により抑制する。この
非直線抵抗素子R5には、避雷器１に使用されて
いる同様な酸化亜鉛素子などが使用できる。 Next, the operation will be explained. A lightning arrester 1 configured by stacking zinc oxide elements with excellent non-linear resistance characteristics is installed at a power generation substation as a power surge arrester, for example, in order to protect a power system from overvoltage surges. The lightning arrester 1 is constantly subjected to continuous operating voltage and is also subject to a large overvoltage during lightning strikes, but it is required to absorb this lightning surge current, suppress the overvoltage to a certain level, and protect the protected equipment. Because of this responsibility, power surge arresters are inspected regularly, and the inspection items that are usually carried out are mainly to measure minute leakage currents against continuous operating voltages and to check the number of times they operate in response to lightning surges. . When measuring the leakage current of the lightning arrester 1, open the switch 3, which is normally closed during continuous use, and read the current with respect to the continuous use voltage using the ammeter 4.
It is determined whether the lightning arrester 1 is healthy or not depending on whether the measured leakage current is within a predetermined range. After measuring the leakage current, close the switch 3 again.
On the other hand, when checking the number of operations of the lightning arrester 1 in response to a lightning surge, the cumulative number is automatically displayed on the counter 7 of the surge operation counter 6, so whether there is an abnormal number of operations by this counter display. Check whether or not. In the surge operation counter 6, the charge of the surge current flowing through the lightning arrester 1 during a lightning strike is stored in the capacitor C, and the counter 7 is operated by the discharge energy of this charge. At this time, an overvoltage due to a surge current further generated between the terminals of the capacitor C and the counter 7 is suppressed by a non-linear resistance element R5 connected in parallel for overvoltage suppression. A zinc oxide element similar to that used in the lightning arrester 1 can be used as the non-linear resistance element R5 .
こうして被保護機器の通常使用状態において
は、スイツチ３を閉じて雷サージ電流をサージ動
作計数部６に流すことにより、サージに対する避
雷器１の動作回数を計数し、スイツチ３を開放し
て電流計４に電流を流すことにより、避雷器１の
使用時漏れ電流を計測している。 In this way, in the normal use state of the protected equipment, the number of operations of the lightning arrester 1 in response to the surge is counted by closing the switch 3 and passing the lightning surge current to the surge operation counter 6, and by opening the switch 3 and passing the lightning surge current to the surge operation counter 6. The leakage current when the lightning arrester 1 is in use is measured by passing a current through.
従来の避雷器動作表示装置は以上のように構成
されているので、避雷器１に流れる漏れ電流を連
続的に監視できず計測時にいちいちスイツチ３を
開き、電流計４を計測状態にする必要があつた。
また、スイツチ３の操作時の雷襲を考慮し、感電
防止のため、絶縁ハンドル（図示せず）を付けた
り、サージ電流吸収用の保護ギヤツプ５を並列接
続する必要があつた。さらに、もしスイツチ３開
放時に雷撃があると、電流計４が破壊される恐れ
があるなどの問題点があつた。
Since the conventional lightning arrester operation display device is configured as described above, it is not possible to continuously monitor the leakage current flowing through the lightning arrester 1, and it is necessary to open the switch 3 and set the ammeter 4 to the measurement state each time when measuring. .
In addition, in consideration of lightning strikes when operating the switch 3, it was necessary to attach an insulating handle (not shown) and to connect a protective gap 5 in parallel to absorb surge current to prevent electric shock. Furthermore, if there is a lightning strike when the switch 3 is open, there is a problem that the ammeter 4 may be destroyed.
この考案は上記のような問題点を解決するため
になされたもので、避雷器の漏れ電流を連続的に
計測するとともに、サージ動作回数を自動的に計
数する避雷器動作表示装置を得ることを目的とす
る。 This idea was devised to solve the problems mentioned above, and the purpose was to obtain a lightning arrester operation display device that continuously measures the leakage current of the surge arrester and automatically counts the number of surge operations. do.
この考案による避雷器動作表示装置は、漏れ電
流計測部の電流計に抵抗を直列接続すると共に、
電流計と抵抗との直列回路にサージ電流による過
電圧を吸収する非直線抵抗素子を並列に設け、避
雷器の漏れ電流を連続的に計測するとともに、サ
ージ動作計数部に対する過電圧を吸収するための
非直線抵抗素子をこれら漏れ電流計測部とサージ
動作計数部とに並列に設けたものである。
The lightning arrester operation display device according to this invention connects a resistor in series to the ammeter of the leakage current measuring section, and
A nonlinear resistance element that absorbs overvoltage due to surge current is installed in parallel in the series circuit of an ammeter and a resistor, and the leakage current of the lightning arrester is continuously measured. A resistive element is provided in parallel with the leakage current measuring section and the surge operation counting section.
この考案による避雷器動作表示装置は、第１の
非直線抵抗素子を接続してなる漏れ電流計測部
と、サージに対する動作回計数部とを直列接続し
た回路に並列に第２の非直線抵抗素子を接続する
ことにより、サージ電流に対しては電流計を破壊
することなく漏れ電流を測定し、コンデンサおよ
びカウンタを破壊することなくサージに対する避
雷器の動作回数を計数する。
The lightning arrester operation display device according to this invention has a second non-linear resistance element connected in parallel to a circuit in which a leakage current measuring section formed by connecting a first non-linear resistance element and a surge operation counter section are connected in series. By connecting it, leakage current can be measured in response to surge current without destroying the ammeter, and the number of times the lightning arrester operates in response to surge can be counted without destroying the capacitor and counter.
以下、この考案の第１実施例を図について説明
する。第１図において、符号１，４，７，Ｃおよ
びＬについては第５図と同じ構成である。８は漏
れ電流計測部であり、電流計４に直列接続された
抵抗ｒ、並びに、電流計４と抵抗ｒとの直列回路
に対し並列に接続された非直線抵抗素子R1を有
している。９はサージ動作計数部であり、コンデ
ンサＣとこのコンデンサを介して駆動されるコイ
ルＬを有し動作回数を表示するカウンタ７との並
列接続からなつている。避雷器動作表示装置１０
は、これらの漏れ電流計測部８とサージ動作計数
部９との直列作業に非直線抵抗素子R2を並列接
続して構成され、避雷器１と接地との間に挿入さ
れる。
A first embodiment of this invention will be described below with reference to the drawings. In FIG. 1, symbols 1, 4, 7, C and L have the same configuration as in FIG. 5. 8 is a leakage current measuring section, which has a resistor r connected in series to the ammeter 4, and a non-linear resistance element R1 connected in parallel to the series circuit of the ammeter 4 and the resistor r. . Reference numeral 9 denotes a surge operation counter, which is composed of a capacitor C and a counter 7 having a coil L driven through the capacitor and connected in parallel to display the number of operations. Lightning arrester operation display device 10
is constructed by connecting the non-linear resistance element R 2 in parallel to the leakage current measuring section 8 and the surge operation counting section 9 in series, and is inserted between the lightning arrester 1 and the ground.
次に動作について説明する。通常、漏れ電流計
測部８で計測すべき避雷器の漏れ電流は数10μA
〜数10mA程度であり、一方、サージ動作計数部
９で計数すべき電流は数Ａ〜数10KAである。従
つて、避雷器動作表示装置１０内の各要素即ち、
非直線抵抗素子R1，R2、抵抗ｒ、コンデンサＣ
およびコイルＬは、このような数10μA〜数
10KAにわたる広い範囲の避雷器１の電流を、電
流計４およびカウンタ７に対し何ら損傷を与える
ことなく流しつつ、漏れ電流を計測し、かつ動作
回数を表示できる様に定数が選定されている。 Next, the operation will be explained. Normally, the leakage current of the lightning arrester that should be measured by the leakage current measurement unit 8 is several tens of μA.
On the other hand, the current to be counted by the surge operation counter 9 is several A to several tens of KA. Therefore, each element in the lightning arrester operation display device 10, that is,
Nonlinear resistance elements R 1 , R 2 , resistance r, capacitor C
And the coil L is such a few 10 μA to several
The constants are selected so that the current of the lightning arrester 1 can be passed over a wide range of 10 KA without causing any damage to the ammeter 4 and counter 7, and the leakage current can be measured and the number of operations can be displayed.
第２図は避雷器動作表示装置１０の各要素の電
流−電圧特性を示したものである。図中、非直線
抵抗素子R1，R2の特性は一点鎖線、抵抗ｒおよ
びサージ動作計数部９の特性は破線、避雷器動作
表示装置１０の特性は実線でそれぞれ示されてい
る。酸化亜鉛素子などを使用した非直線抵抗素子
R1およびR2の特性は、R2よりR1が先に動作する
ようにR1の制限電圧がR2より低くなるように設
定されている。抵抗ｒは、電流計４に損傷を与え
ない大きさの数10mA程度の電流でR1の特性と交
点P1で交わるように設定する。このように設定
すると数10mA以下の電流では非直線抵抗素子
R1，R2は動作しないので電流計４で漏れ電流が
計測できる。数10mAより大きな電流が避雷器動
作表示装置１０に流れると、非直線抵抗素子R1
が動作し始め電圧の上昇を防ぐと同時に電流計４
が過電流から破壊するのを防止する。一方、サー
ジ動作計数部９内のコンデンサＣとカウンタ７内
のコイルＬとの総合インピーダンスは数10〜数Ｋ
Ω程度に設定されているので、数10mA程度以下
の漏れ電流による電圧降下は小さく無視し得る。
しかし、数10mAよりも電流が大きくなると避雷
器動作表示装置１０の電圧はサージ動作計数部９
の特性に従つて交点P2付近から急激に増大する。
さらに電流が数Ａにも達すると、コンデンサＣに
はカウンタ７を動作させるに十分な電荷が充電さ
れる。従つて、カウンタ７がサージ動作として計
数する。更に、電流が数Ａより大きくなると、交
点P3付近から非直線抵抗素子R2が動作し始め電
圧の上昇を抑えると共に、サージ動作計数部９内
のコンデンサＣやコイルＬが過電圧で絶縁破壊す
るのを防止する。このように第１図の避雷器動作
表示装置１０の各要素の定数を第２図に示す関係
の特性に設定することにより、避雷１に流れる漏
れ電流を常時計測し、かつ回路素子間の損傷を防
ぎながらサージに対する動作回数を計数すること
ができる。 FIG. 2 shows the current-voltage characteristics of each element of the lightning arrester operation display device 10. In the figure, the characteristics of the non-linear resistance elements R 1 and R 2 are shown by a dashed line, the characteristics of the resistance r and the surge operation counter 9 are shown by a broken line, and the characteristics of the lightning arrester operation display device 10 are shown by a solid line. Nonlinear resistance elements using zinc oxide elements, etc.
The characteristics of R 1 and R 2 are set so that the limiting voltage of R 1 is lower than that of R 2 so that R 1 operates before R 2 . The resistance r is set so that a current of about several tens of mA, which is large enough not to damage the ammeter 4, intersects the characteristic of R1 at an intersection point P1 . With this setting, a nonlinear resistance element is used at a current of several tens of milliamps or less.
Since R 1 and R 2 do not operate, the leakage current can be measured with the ammeter 4. When a current larger than several tens of mA flows through the lightning arrester operation display device 10, the nonlinear resistance element R 1
begins to operate and prevents the voltage from rising, and at the same time the ammeter 4
prevents damage from overcurrent. On the other hand, the total impedance of the capacitor C in the surge operation counter 9 and the coil L in the counter 7 is several tens to several K.
Since it is set to about Ω, the voltage drop due to leakage current of about several tens of mA or less is small and can be ignored.
However, when the current becomes larger than several tens of milliamps, the voltage of the arrester operation display device 10 becomes smaller than the surge operation counter 9.
According to the characteristics of , it increases rapidly from around the intersection P 2 .
Furthermore, when the current reaches several amperes, the capacitor C is charged with enough charge to operate the counter 7. Therefore, the counter 7 counts it as a surge operation. Furthermore, when the current becomes larger than several A, the non-linear resistance element R2 starts operating near the intersection P3 and suppresses the rise in voltage, and the capacitor C and coil L in the surge operation counter 9 break down due to overvoltage. to prevent By setting the constants of each element of the lightning arrester operation display device 10 shown in FIG. 1 to the characteristics shown in FIG. It is possible to count the number of operations against surges while preventing them.
第３図はこの考案の第２実施例を示し、避雷器
動作表示装置１０Ａの漏れ電流計測部８Ａ内の電
流計４に対し並列に、コンデンサC1および定電
圧ダイオー（ツエナダイオード）などのカウンタ
R3を接続したものである。第３図の実施例によ
れば、急峻なサージ電流に対して直線抵抗素子
R1およびR2の動作に時間遅れを生じても、コン
デンサC1および非直線抵抗素子R3が電流を吸収
するので電流計４の過電流破壊を防ぐ効果があ
る。この場合、コンデンサC1又は非直線抵抗素
子R3のどちらか一方のみが接続されていても良
い。 FIG. 3 shows a second embodiment of this invention, in which a counter such as a capacitor C1 and a constant voltage diode (Zena diode) is connected in parallel to the ammeter 4 in the leakage current measuring section 8A of the lightning arrester operation display device 10A.
This is what R3 is connected to. According to the embodiment shown in FIG. 3, a linear resistance element is
Even if there is a time delay in the operation of R 1 and R 2 , the capacitor C 1 and the nonlinear resistance element R 3 absorb the current, which has the effect of preventing the ammeter 4 from being destroyed by overcurrent. In this case, only either the capacitor C 1 or the nonlinear resistance element R 3 may be connected.
又、第４図は、この考案の第３実施例を示し、
避雷器動作表示装置１０Ｂの漏れ電流計測部８Ｂ
内の電流計４を接続端子１２，１２を介した長い
平行リード線１３，１３で接続し、避雷器動作表
示装置１０Ｂの本体装置（図示せず）から離れた
場所で漏れ電流を計測できるようにしたものであ
る。又、接続端子１２，１２間に電流計４接続用
の開閉スイツチ１１を電流計４と並列に接続す
る。第４図の実施例によれば、リード線１３，１
３の間で浮遊容量をもつので急峻なサージ電流に
対しバイパスとして作用し、電流計４は保護され
る。又、電流計４を取り外したり、交換したりす
る際にはスイツチ１１を閉成して行なえばよい。
勿論スイツチ１１は通常は不必要であり開放され
ている。なお、この場合、第４図のように漏れ電
流計測部８Ｂを接地側にもつていれば、リード線
１３の電位が大きく浮き上がることを防止でき
る。 Moreover, FIG. 4 shows a third embodiment of this invention,
Leakage current measurement section 8B of lightning arrester operation display device 10B
The ammeter 4 inside is connected with long parallel lead wires 13, 13 through connection terminals 12, 12, so that leakage current can be measured at a location away from the main unit (not shown) of the lightning arrester operation display device 10B. This is what I did. Further, an on/off switch 11 for connecting the ammeter 4 is connected between the connection terminals 12 and 12 in parallel with the ammeter 4. According to the embodiment of FIG.
Since it has a stray capacitance between 3 and 3, it acts as a bypass against steep surge currents, and the ammeter 4 is protected. Further, when removing or replacing the ammeter 4, it is sufficient to close the switch 11.
Of course, the switch 11 is normally unnecessary and is left open. In this case, if the leakage current measuring section 8B is connected to the ground side as shown in FIG. 4, it is possible to prevent the potential of the lead wire 13 from rising significantly.
以上のようにこの考案によれば、電流計に対し
直列に抵抗を接続し且つ並列に第１の非直線抵抗
素子を接続してなる漏れ電流計測部と、サージ動
作計数部とを直列接続した回路に対し、更に並列
に第２の非直線抵抗素子を接続したので、一つの
避雷器動作表示装置で、スイツチの開閉操作を行
なうことなく各回路要素を保護し、避雷器の漏れ
電流を連続的に安全にかつ容易に計測でき、また
サージに対する避雷器の動作回数を自動的に同時
に計数できるという効果がある。
As described above, according to this invention, the leakage current measurement section, which is formed by connecting a resistor in series with the ammeter and the first non-linear resistance element in parallel, and the surge operation counting section are connected in series. Since a second non-linear resistance element is connected in parallel to the circuit, a single lightning arrester operation display device can protect each circuit element without having to open or close a switch, and can continuously reduce the leakage current of the lightning arrester. This method has the advantage of being able to be safely and easily measured, and also automatically and simultaneously counting the number of times the lightning arrester operates in response to a surge.
第１図はこの考案の一実施例による避雷器動作
表示装置を示す回路図、第２図は第１図の避雷器
動作表示装置の動作を説明する電流・電圧特性
図、第３図および第４図はそれぞれこの考案の異
なる実施例を示す避雷器動作表示装置の回路図、
第５図は従来の避雷器動作表示装置を示す回路図
である。
１は避雷器、４は電流計、７はカウンタ、８，
８Ａ，８Ｂは漏れ電流計測部、９はサージ動作計
数部、１０，１０Ａ，１０Ｂは避雷器動作表示装
置、１２は接続端子、１３はリード線、ｒは抵
抗、R1〜R3は非直線抵抗素子、Ｃ，C1はコンデ
ンサである。なお、図中、同一符号は同一又は相
当部分を示す。
FIG. 1 is a circuit diagram showing a lightning arrester operation display device according to an embodiment of this invention, FIG. 2 is a current/voltage characteristic diagram explaining the operation of the lightning arrester operation display device of FIG. 1, and FIGS. 3 and 4 are circuit diagrams of lightning arrester operation display devices showing different embodiments of this invention, respectively;
FIG. 5 is a circuit diagram showing a conventional lightning arrester operation display device. 1 is a lightning arrester, 4 is an ammeter, 7 is a counter, 8,
8A and 8B are leakage current measurement parts, 9 is a surge operation counter, 10, 10A, and 10B are lightning arrester operation display devices, 12 is a connection terminal, 13 is a lead wire, r is a resistance, and R 1 to R 3 are nonlinear resistances. Elements C and C1 are capacitors. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
電流計測部に直列接続され、コンデンサおよび
カウンタの並列接続を有するサージ動作計測部
とからなり、避雷器と接地との間に接続された
避雷器動作表示装置において、前記電流計に直
列接続された抵抗と、前記電流計と前記抵抗と
の直列回路に対し並列接続された第１の非直線
抵抗素子と、前記漏れ電流計測部と前記サージ
動作計測部との直列回路に対し並列に接続され
た第２の非直線抵抗素子とを備え、前記第１の
非直線抵抗素子の制限電圧が、前記第２の非直
線抵抗素子の制限電圧より低く設定されたこと
を特徴とする避雷器動作表示装置。 (2) 電流計に、第３の非直線抵抗素子またはコン
デンサを並列接続したことを特徴とする実用新
案登録請求の範囲第１項記載の避雷器動作表示
装置。 (3) 電流計が、接続端子およびこの接続端子に接
続された平行なリード線を介して接続されたこ
とを特徴とする実用新案登録請求の範囲第１項
記載の避雷器動作表示装置。[Claims for Utility Model Registration] (1) Consisting of a leakage current measuring section having an ammeter, and a surge operation measuring section connected in series to this leakage current measuring section and having a capacitor and a counter connected in parallel, the surge arrester and grounding a lightning arrester operation display device connected between the lightning arrester operation display device, a resistor connected in series to the ammeter, a first non-linear resistance element connected in parallel to the series circuit of the ammeter and the resistor; a second non-linear resistance element connected in parallel to the series circuit of the leakage current measurement section and the surge operation measurement section, wherein the limiting voltage of the first non-linear resistance element is set to the second non-linear resistance element; A lightning arrester operation display device characterized in that the voltage is set lower than the limit voltage of a linear resistance element. (2) The lightning arrester operation display device according to claim 1, which is characterized in that a third non-linear resistance element or a capacitor is connected in parallel to the ammeter. (3) The lightning arrester operation display device according to claim 1, wherein the ammeter is connected via a connecting terminal and parallel lead wires connected to the connecting terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4930585U JPH0331025Y2 (en) | 1985-04-04 | 1985-04-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4930585U JPH0331025Y2 (en) | 1985-04-04 | 1985-04-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61166494U JPS61166494U (en) | 1986-10-15 |
| JPH0331025Y2 true JPH0331025Y2 (en) | 1991-07-01 |
Family
ID=30566377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4930585U Expired JPH0331025Y2 (en) | 1985-04-04 | 1985-04-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0331025Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5618817B2 (en) * | 2010-12-27 | 2014-11-05 | 株式会社東芝 | Discharge meter |
| JP6860439B2 (en) * | 2017-07-18 | 2021-04-14 | 株式会社東芝 | Discharge frequency meter and current measuring device |
-
1985
- 1985-04-04 JP JP4930585U patent/JPH0331025Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61166494U (en) | 1986-10-15 |
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