JPS644151B2 - - Google Patents
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- Publication number
- JPS644151B2 JPS644151B2 JP6561779A JP6561779A JPS644151B2 JP S644151 B2 JPS644151 B2 JP S644151B2 JP 6561779 A JP6561779 A JP 6561779A JP 6561779 A JP6561779 A JP 6561779A JP S644151 B2 JPS644151 B2 JP S644151B2
- Authority
- JP
- Japan
- Prior art keywords
- resistance element
- linear resistance
- electric circuit
- gear press
- temperature
- 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
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- Thermistors And Varistors (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Description
【発明の詳細な説明】
本発明は、複数個の非直線抵抗素子を積重ねて
構成されたギヤツプレス避雷器の劣化検出装置に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deterioration detection device for a gear press arrester constructed by stacking a plurality of non-linear resistance elements.
従来広く用いられている直列ギヤツプ付避雷器
は、第１図に示すように、炭化けい素SiCからな
る特性要素１と火花ギヤツプ２を直列に組合せて
構成されており、線路３に接続された状態におい
て、その特性要素１が火花ギヤツプ２により線路
３から分離されているいため、常規対地電圧では
特性要素１に電流が流れず、特性要素１が劣化し
た場合にも、その温度上昇は起こり得ない。 A lightning arrester with a series gap, which has been widely used in the past, is constructed by combining a characteristic element 1 made of silicon carbide SiC and a spark gap 2 in series, as shown in Fig. 1, and when connected to a line 3. Since characteristic element 1 is separated from line 3 by spark gap 2, no current flows through characteristic element 1 at normal ground voltage, and even if characteristic element 1 deteriorates, its temperature cannot rise. .
一方、最近その適用範囲が広がりつつあるギヤ
ツプレス避雷器は、上記のような火花ギヤツプが
不必要で、酸化亜鉛ZnOと主成分とする非直線性
の良い非直線抵抗素子を積重ねて構成されてお
り、線路とアース間に接続されることが多い。こ
の非直線抵抗素子の等価回路は、第２図に示すよ
うに、静電容量Ｃと非直線抵抗ｒの並列回路で表
わすことができる。定常状態では非直線抵抗ｒは
非常に高抵抗であるため、第３図に示すような静
電容量による僅かな電流Ic分のみで、ほとんど温
度上昇はないが、非直線抵抗素子が劣化した場合
には、非直線抵抗ｒの値が低下して、これによる
電流Ir分が増加し、非直線抵抗素子の温度が上昇
する。 On the other hand, gear press lightning arresters, whose scope of application has been expanding recently, do not require the spark gap described above and are constructed by stacking nonlinear resistance elements with good nonlinearity that are mainly composed of zinc oxide ZnO. Often connected between the line and ground. The equivalent circuit of this nonlinear resistance element can be represented by a parallel circuit of a capacitance C and a nonlinear resistance r, as shown in FIG. In a steady state, the nonlinear resistance r has a very high resistance, so there is almost no temperature rise due to only a small amount of current Ic due to capacitance as shown in Figure 3, but if the nonlinear resistance element deteriorates. , the value of the non-linear resistance r decreases, the current I r increases due to this, and the temperature of the non-linear resistance element increases.
すなわち、ギヤツプレス避雷器の内部素子に流
れるもれ電流Ｉ（＝Ic＋Ir）および内部素子の温度
ｔは、第４図に示すように定常状態（期間T1）
ではいずれも一定値を保つているが、長期間の運
転によつて非直線抵抗素子が劣化してくると（期
間T2）、線路の常規対地電圧に対して素子もれ電
流Ｉが次第に増加し、これに伴つて素子温度ｔも
上昇し、ついには避雷器としての役目を果せなく
なる。したがつて、非直線抵抗素子の劣化を常時
監視することが望ましい。 In other words, the leakage current I (=I c + I r ) flowing through the internal elements of the gear press arrester and the temperature t of the internal elements are in a steady state (period T 1 ) as shown in FIG.
However, as the nonlinear resistance element deteriorates due to long-term operation (period T 2 ), the element leakage current I gradually increases with respect to the line's normal ground voltage. However, along with this, the element temperature t also rises, and eventually it becomes unable to fulfill its role as a lightning arrester. Therefore, it is desirable to constantly monitor the deterioration of the nonlinear resistance element.
本発明はこの点に鑑みてなされたもので、その
目的は、簡単な構成により非直線抵抗素子の劣化
を常時監視することのできるギヤツプレス避雷器
の劣化検出装置を提供するにある。 The present invention has been made in view of this point, and its object is to provide a deterioration detection device for a gear press arrester that can constantly monitor deterioration of a nonlinear resistance element with a simple configuration.
この目的を達成するため、本発明は、もれ電流
を分流する電気回路を設けるとともに、この電気
回路に非直線抵抗素子の温度を感知する感温スイ
ツチを挿入し、非直線抵抗素子の劣化に起因して
温度上昇した場合、感温スイツチを閉じて前記電
気回路にもれ電流を流し、このもれ電流によつて
報知装置を動作させるようにしたことを特徴とす
る。 In order to achieve this object, the present invention provides an electric circuit that shunts the leakage current, and also inserts a temperature-sensitive switch that senses the temperature of the non-linear resistance element into this electric circuit to prevent deterioration of the non-linear resistance element. When the temperature rises due to this, the temperature-sensitive switch is closed to cause leakage current to flow through the electric circuit, and the alarm device is operated by this leakage current.
以下、本発明の実施例を図面について詳細に説
明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第５図は本発明の一実施例に係る劣化検出装置
の電気回路図である。ギヤツプレス避雷器４は多
数の非直線抵抗素子５1〜５oを積重ねることによ
つて構成され、線路３とアース間に接続されてい
る。下層の非直線抵抗素子に伝熱的に接触させた
状態でバイメタルなどのような感温スイツチ６が
設けられており、その一方の接点は最下層の非直
線抵抗素子５1とそのすぐ上層の非直線抵抗素子
５2との間に接続され、他方の接点は絶縁変圧器
７の１次側を介してアースに接続されている。絶
縁変圧器７の２次側には、整流器８、平滑用抵抗
９、平滑用コンデンサ１０を介してリレー１１の
コイルが接続され、このリレー１１の接点は警報
装置１２の駆動回路に挿入されている。なお、絶
縁変圧器７の１次側には保護ギヤツプ１３が並列
に接続されている。 FIG. 5 is an electrical circuit diagram of a deterioration detection device according to an embodiment of the present invention. The gear press arrester 4 is constructed by stacking a large number of nonlinear resistance elements 5 1 to 5 o , and is connected between the line 3 and the ground. A temperature-sensitive switch 6 such as a bimetal is provided in heat conductive contact with the non-linear resistance element in the lower layer, and one contact point is between the non-linear resistance element 51 in the lowermost layer and the non-linear resistance element 51 in the layer immediately above it. The other contact is connected to the ground via the primary side of the isolation transformer 7 . A coil of a relay 11 is connected to the secondary side of the isolation transformer 7 via a rectifier 8, a smoothing resistor 9, and a smoothing capacitor 10, and the contacts of this relay 11 are inserted into the drive circuit of the alarm device 12. There is. Note that a protective gap 13 is connected in parallel to the primary side of the isolation transformer 7.
定常状態では、前述の如く線路３の常規対地電
圧に対する避雷器４の素子もれ電流Ｉはきわめて
小さく、非直線抵抗素子の温度上昇も少ないの
で、第６図に示すように、感温スイツチ６は開い
ている。したがつて、素子もれ電流Ｉはすべて最
下層の非直線抵抗素子５1を通る線路でアースに
流れ、絶縁変圧器７の１次側には流れないので、
警報装置１２は動作しない。 In a steady state, as mentioned above, the element leakage current I of the lightning arrester 4 with respect to the normal ground voltage of the line 3 is extremely small, and the temperature rise of the nonlinear resistance element is also small, so as shown in FIG. is open. Therefore, all the element leakage current I flows to the ground through the line passing through the non-linear resistance element 51 in the lowest layer, and does not flow to the primary side of the isolation transformer 7, so
The alarm device 12 does not operate.
ところが、非直線抵抗素子を劣化すると、常規
対地電圧に対する素子もれ電流Ｉが増加し、これ
に伴つて素子温度ｔも上昇する。そして、非直線
抵抗素子の劣化が進み、素子温度ｔがあらかじめ
定められた温度まで上昇すると、第７図に示すよ
うに、感温スイツチ６が閉じ、素子もれ電流Ｉ
は、最下層の非直線抵抗素子５1を通る電流I1と
絶縁変圧器７の１次側を通る電流I2に分流する。
したがつて、絶縁変圧器７の２次側には電圧が誘
起され、整流器８で整流されかつ平滑用抵抗９お
よびコンデンサ１０で平滑化された電流I3がリレ
ー１１のコイルに流れ、その接点が閉じて、警報
装置１２が動作し、非直線抵抗素子の劣化を検出
することができる。 However, when the nonlinear resistance element deteriorates, the element leakage current I with respect to the normal ground voltage increases, and the element temperature t also rises accordingly. When the nonlinear resistance element deteriorates and the element temperature t rises to a predetermined temperature, the temperature-sensitive switch 6 closes and the element leakage current I
is divided into a current I 1 passing through the non-linear resistance element 5 1 in the lowermost layer and a current I 2 passing through the primary side of the isolation transformer 7 .
Therefore, a voltage is induced on the secondary side of the isolation transformer 7, and a current I3 , which is rectified by the rectifier 8 and smoothed by the smoothing resistor 9 and the capacitor 10, flows to the coil of the relay 11, and its contacts is closed, the alarm device 12 is activated, and deterioration of the nonlinear resistance element can be detected.
なお、線路３に定格電圧以上の電圧が課電され
たような異常条件下でギヤツプレス避雷器４が動
作した場合にも、素子温度ｔが上昇して感温スイ
ツチ６が閉じ、非直線抵抗素子が劣化していない
にも拘らず、警報装置１２が動作してしまう虞れ
があるので、このような場合には、例えばギヤツ
プレス避雷器４が動作したことを知らせる動作報
知器の動作信号によつて開路するスイツチを絶縁
変圧器７の１次側または２次側、あるいは警報装
置１２の駆動回路等に挿入して、感温スイツチ６
が閉じても警報装置１２が動作しないようにして
おく。 Note that even if the gear press arrester 4 operates under abnormal conditions such as when a voltage higher than the rated voltage is applied to the line 3, the element temperature t increases and the temperature-sensitive switch 6 closes, causing the non-linear resistance element to close. There is a risk that the alarm device 12 may operate even though the gear press arrester 4 has not deteriorated, so in such a case, for example, an operation signal from an operation alarm to notify that the gear press arrester 4 has operated may be activated. Insert a switch into the primary side or secondary side of the isolation transformer 7, or the drive circuit of the alarm device 12, and turn on the temperature-sensitive switch 6.
The alarm device 12 is made not to operate even if the door is closed.
このように、本実施例によれば、ギヤツプレス
避雷器の運転中においても、他に悪影響を与える
ことなく、非直線抵抗素子の劣化を監視すること
ができる。しかも、動作電流として非直線抵抗素
子に流れるもれ電流を利用しているため、特に電
源を必要とすることなくその構成がきわめて簡単
になるとともに、動作電流を大きくとることがで
き、したがつて誤動作が少なく確実に非直線抵抗
素子の劣化を監視することができる。 As described above, according to this embodiment, even while the gear press arrester is in operation, the deterioration of the nonlinear resistance element can be monitored without adversely affecting others. Moreover, since the leakage current flowing through the non-linear resistance element is used as the operating current, the configuration is extremely simple without requiring a particular power supply, and a large operating current can be taken. Deterioration of the nonlinear resistance element can be reliably monitored with less malfunction.
また、もれ電流を分流する電気回路は低圧側の
非直線抵抗素子とアース間に設けられているた
め、絶縁変圧器の絶縁耐力が低くて済む利点もあ
る。 Furthermore, since the electric circuit that shunts the leakage current is provided between the nonlinear resistance element on the low voltage side and the ground, there is an advantage that the dielectric strength of the isolation transformer can be low.
前記実施例では、非直線抵抗素子の劣化を知ら
せる報知装置として警報装置を用いているが、こ
れに限らず、例えば表示装置などを用いることも
できる。 In the embodiments described above, an alarm device is used as a notification device for notifying the deterioration of the non-linear resistance element, but the present invention is not limited to this, and for example, a display device or the like may be used.
以上説明したように、本発明によれば、非直線
抵抗素子が劣化すると、感温スイツチにより電気
的な分流回路を閉成し非直線抵抗素子自身に流れ
るもれ電流を利用して劣化検出装置を動作させて
いるため、電源を必要とすることなくその構成が
きわめて簡単になるとともに、動作電流を大きく
とることができ、したがつて誤動作が少なく確実
に非直線抵抗素子の劣化を監視することができ
る。 As explained above, according to the present invention, when a non-linear resistance element deteriorates, an electrical shunt circuit is closed by a temperature-sensitive switch, and the deterioration detection device utilizes the leakage current flowing through the non-linear resistance element itself. Because it operates, the configuration is extremely simple without requiring a power supply, and a large operating current can be taken, so it is possible to reliably monitor the deterioration of nonlinear resistance elements with fewer malfunctions. I can do it.
第１図は従来の直列ギヤツプ付避雷器の概略構
成図、第２図はギヤツプレス避雷器の非直線抵抗
素子の等価回路図、第３図は電流波形図、第４図
はギヤツプレス避雷器の非直線抵抗素子のもれ電
流および温度特性図、第５図は本発明の一実施例
に係る劣化検出装置の電気回路図、第６図および
第７図は第５図に示した劣化検出装置の各動作状
態を示す概略電気回路図である。
４……ギヤツプレス避雷器、５1〜５o……非直
線抵抗素子、６……感温スイツチ、７……絶縁変
圧器、１１……リレー、１２……警報装置。
Figure 1 is a schematic configuration diagram of a conventional series gap arrester, Figure 2 is an equivalent circuit diagram of a nonlinear resistance element in a gear press arrester, Figure 3 is a current waveform diagram, and Figure 4 is a nonlinear resistance element in a gear press arrester. 5 is an electric circuit diagram of a deterioration detection device according to an embodiment of the present invention, and FIGS. 6 and 7 are diagrams showing each operating state of the deterioration detection device shown in FIG. 5. It is a schematic electric circuit diagram showing. 4... Gear press lightning arrester, 5 1 to 5 o ... Non-linear resistance element, 6... Temperature sensitive switch, 7... Isolation transformer, 11... Relay, 12... Alarm device.
Claims (1)
たギヤツプレス避雷器において、前記非直線抵抗
素子を流れるもれ電流を分流する電気回路を設け
るとともに、この電気回路に、前記非直線抵抗素
子と伝熱的に接触させた状態で設けられた感温ス
イツチを挿入し、かつ前記電気回路に分流するも
れ電流によつて動作する報知装置を設けたことを
特徴とするギヤツプレス避雷器の劣化検出装置。 ２ 特許請求の範囲第１項において、前記電気回
路は、低圧側に配置された前記非直線抵抗素子と
アースとの間に設けられていることを特徴とする
ギヤツプレス避雷器の劣化検出装置。 ３ 特許請求の範囲第１項において、前記報知装
置は、前記電気回路に絶縁変圧器を介して接続さ
れていることを特徴とするギヤツプレス避雷器の
劣化検出装置。[Scope of Claims] 1. In a gear press lightning arrester configured by stacking a plurality of non-linear resistance elements, an electric circuit is provided to shunt the leakage current flowing through the non-linear resistance elements, and this electric circuit includes the non-linear resistance elements. A gear press lightning arrester, characterized in that a temperature-sensitive switch is inserted in thermally contact with a linear resistance element, and an alarm device is provided which is operated by a leakage current shunted into the electric circuit. deterioration detection device. 2. The deterioration detection device for a gear press arrester according to claim 1, wherein the electric circuit is provided between the non-linear resistance element arranged on the low voltage side and the ground. 3. The gear press lightning arrester deterioration detection device according to claim 1, wherein the notification device is connected to the electric circuit via an isolation transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6561779A JPS55158607A (en) | 1979-05-29 | 1979-05-29 | Gapless arrester deterioration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6561779A JPS55158607A (en) | 1979-05-29 | 1979-05-29 | Gapless arrester deterioration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55158607A JPS55158607A (en) | 1980-12-10 |
| JPS644151B2 true JPS644151B2 (en) | 1989-01-24 |
Family
ID=13292150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6561779A Granted JPS55158607A (en) | 1979-05-29 | 1979-05-29 | Gapless arrester deterioration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55158607A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846175U (en) * | 1981-09-22 | 1983-03-28 | 株式会社明電舎 | ZnO element life test equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59788B2 (en) * | 1977-03-29 | 1984-01-09 | 株式会社明電舎 | Gear press arrester deterioration detection device |
-
1979
- 1979-05-29 JP JP6561779A patent/JPS55158607A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55158607A (en) | 1980-12-10 |
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