JPH03158774A - Insulation diagnostic method of section separating type for single cored cable line of cross-bond system - Google Patents
Insulation diagnostic method of section separating type for single cored cable line of cross-bond systemInfo
- Publication number
- JPH03158774A JPH03158774A JP29848389A JP29848389A JPH03158774A JP H03158774 A JPH03158774 A JP H03158774A JP 29848389 A JP29848389 A JP 29848389A JP 29848389 A JP29848389 A JP 29848389A JP H03158774 A JPH03158774 A JP H03158774A
- Authority
- JP
- Japan
- Prior art keywords
- bond
- cross
- grounding
- section
- remote control
- 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
- 238000009413 insulation Methods 0.000 title claims abstract description 32
- 238000002405 diagnostic procedure Methods 0.000 title claims 3
- 238000003745 diagnosis Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 8
- 239000012212 insulator Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000005856 abnormality Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、クロスボンド方式の単芯ケーブル線路に関し
、より具体的には幾つかのクロスボンドされた絶縁接続
部を含みそれらの前後で接地を取る位置での接続部によ
って区切られたクロスボンド区間毎に分離して３相一括
してケーブルの絶縁診断を行える方法の提供に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cross-bonded single-core cable line, and more specifically to a cross-bonded single-core cable line, which includes several cross-bonded insulated connections and is grounded before and after them. The present invention relates to a method for diagnosing the insulation of a three-phase cable at once by separating each cross-bond section separated by a connecting portion at a position where the cable is connected.
（従来の技術）
第５図は、一般的なりロスボンド方式単芯ケーブル線路
の説明図である。同図において、１はケーブル金属シー
ス、３は絶縁接続部で３３は縁切り部、４はクロスボン
ド線、１２は普通接続部、５はその接地線である。(Prior Art) FIG. 5 is an explanatory diagram of a general loss bond type single-core cable line. In the figure, 1 is a cable metal sheath, 3 is an insulated connection part, 33 is an edge cutting part, 4 is a cross bond wire, 12 is a normal connection part, and 5 is its ground wire.
この線路では、２列のクロスボンドされた絶縁接続部３
の前後で接地されるｔｉ１）接続節１２で区切られる区
間を１つのクロスボンド区間としである。In this line, two rows of cross-bonded insulated connections 3
The section separated by the connecting node 12 (ti1) which is grounded before and after is considered to be one cross-bond section.
従来、上記のようなりロスボンド方式単芯ケーブル線路
に対してケーブル絶縁体の診断を行うものには、第６図
、第７図に示すような方式があった。Conventionally, there have been methods shown in FIGS. 6 and 7 for diagnosing the cable insulator of the loss-bonded single-core cable line as described above.
第６図に示す方式では、各列の絶縁接続部３のクロスボ
ンド接続を解体してクロスボンド綿４を各相毎に絶縁接
続部３の前後に結線してケーブル金属シースｌを導通し
、各列の普通接続部１２の一括接地接続を解体して各接
続部毎にバイパスコンデンサー７を介して接地するもの
とし、そして任意の普通接続部において、各相別々にバ
イパスコンデンサ７を間に挟んで接地線５に抵抗要素を
介して微少電流測定器１０を並列に接続し、該測定器１
０から伝送系を経て測定結果をチエツクすることにより
絶縁診断を行うものである。なお、９は直流成分測定用
抵抗である。In the method shown in FIG. 6, the cross-bond connections of the insulated connection parts 3 in each row are disassembled, and the cross-bond cotton 4 is connected before and after the insulated connection parts 3 for each phase to conduct the cable metal sheath l. The collective grounding connection of the ordinary connection part 12 of each row shall be dismantled and each connection part shall be grounded via the bypass capacitor 7, and at any ordinary connection part, the bypass capacitor 7 shall be sandwiched between each phase separately. A minute current measuring device 10 is connected in parallel to the grounding wire 5 via a resistance element, and the measuring device 1
Insulation diagnosis is performed by checking the measurement results from 0 through the transmission system. Note that 9 is a resistor for measuring the DC component.
第７図に示す方式では、各列の絶縁接続部３のクロスボ
ンド接続を解体するとともに、各列の普通接続部１２の
一括接地接続を解体して各接続部毎にバイパスコンデン
サー７を介して接地するものとし、一つの相に関して二
つの絶縁接続部３を介して隣り合う前後の普通接続部１
２．１２の接地線５．５間に差動検出回路１３を結線し
、同回路から伝送系を経て検出結果をチエツクすること
により、絶縁診断を行うものである。In the method shown in FIG. 7, the cross-bond connections of the insulated connections 3 in each row are disassembled, and the collective ground connection of the normal connections 12 in each row is disassembled, and each connection is connected via a bypass capacitor 7. shall be grounded, and adjacent front and rear normal connections 1 via two insulated connections 3 for one phase.
A differential detection circuit 13 is connected between the ground wires 5.5 of 2.12, and the insulation diagnosis is performed by checking the detection results from the circuit via the transmission system.
なお、解体したクロスボンド線４は、開放しである。Note that the disassembled cross bond wire 4 is left open.
さらに、検出感度の向上を図る意味で、各絶縁接続部に
ついてその両側から取り出される接地線を接地電流比較
回路に結線し、絶縁接続部の両側の接地電流の大小を比
較する方式も提案されている。（特開昭６２−２９８７
７８号）
〔発明が解決しようとする課題〕
第６図に示す方式では、全長が各相毎に電気的に導通す
るものとなっている。Furthermore, in order to improve detection sensitivity, a method has been proposed in which the grounding wires taken out from both sides of each insulated connection are connected to a grounding current comparison circuit, and the magnitude of the grounding current on both sides of the insulated connection is compared. There is. (Unexamined Japanese Patent Publication No. 62-2987
No. 78) [Problems to be Solved by the Invention] In the system shown in FIG. 6, the entire length is electrically connected to each phase.
絶縁診断の要求としては、長距離区間でなく成る区間毎
例えば１〜２１程度毎に診断を行えることとしているが
、かかる方式では、その要求に応えられなかった。The requirement for insulation diagnosis is to be able to perform a diagnosis every 1 to 21 sections, which is not a long distance section, but such a system has not been able to meet this requirement.
また、第６図及び第７図に示す方式では、各絶縁接続部
のクロスボンド接続の解体と再結線が必要であり、その
間線路の運転を休止する必要があるので長時間の運転休
止を強いられる。特に、この種線路の運転休止はなるべ
く短時間にすることが望ましいが、上記方式ではその要
望に応えられなかった。Furthermore, in the method shown in Figures 6 and 7, it is necessary to dismantle and reconnect the cross-bond connections of each insulated connection, and during this time it is necessary to suspend operation of the line, forcing a long suspension of operation. It will be done. In particular, it is desirable that the suspension of operation of this type of line be as short as possible, but the above-mentioned system cannot meet this demand.
さらに、特開昭６２−２９８７７８号の方式によれば、
最短区間の絶縁診断となり得るが、ケーブル線路の一つ
の相毎に測定する方式となる。Furthermore, according to the method of JP-A No. 62-298778,
Although it can be an insulation diagnosis for the shortest section, it is a method that measures each phase of the cable line.
絶縁診断には課電電圧の基本波の影響を取り除く必要が
あるが、１相毎の測定では当該基本波の影響が大きくな
り、高速での絶縁診断には不利となる。For insulation diagnosis, it is necessary to remove the influence of the fundamental wave of the applied voltage, but measurement of each phase increases the influence of the fundamental wave, which is disadvantageous for high-speed insulation diagnosis.
本発明は、上記した従来技術の問題点に鑑み、特にクロ
スボンド接続を解体することなく面も３相一括して成る
長さ毎に金属ンース回路を分離して絶縁診断を可能にす
る、クロスボンド方式単芯ケーブル線路の区間分離形絶
縁診断法を提供することに目的をおいたものである。In view of the above-mentioned problems of the prior art, the present invention is a cross-bond circuit that enables insulation diagnosis by separating metal ground circuits for each length, each consisting of three phases at once, without dismantling the cross-bond connections. The purpose of this paper is to provide a section-separated insulation diagnosis method for bonded single-core cable lines.
かかる目的を達成するため本発明では、複数のクロスボ
ンドされた絶縁接続部の前後でクロボンドの区間の区切
りとし且つ接地をとる接続部を絶縁接続部とし、該接地
位置の絶縁接続部に対してその両側で各相間を導通する
接地用ボンド線により各側毎に別々に接地してクロボン
ド区間毎に分離した金属シース回路を形成し、各接地用
ボンド線において遠隔操作切り換えスイッチを含む回路
素子を挿入し、且つ１つのクロスボンド区間においては
片側の絶縁接続部における接地用ボンド線の回路素子に
電流検出手段を含ませ、もって各遠隔操作切り換えスイ
ッチの操作により各クロスボンド区間毎に３相一括して
ケーブル絶縁体に流れる電流成分を検出するようにした
ものである。In order to achieve such an object, in the present invention, a connection part that separates the cross-bond section before and after a plurality of cross-bonded insulated connection parts and is grounded is an insulated connection part, and for the insulated connection part at the ground position. Each side is grounded separately using a grounding bond wire that conducts between each phase on both sides, forming a metal sheath circuit separated for each black bond section, and circuit elements including a remote control switch are connected to each grounding bond wire. In addition, in one cross bond section, a current detection means is included in the circuit element of the grounding bond wire at the insulated connection part on one side, so that three phases can be detected at once for each cross bond section by operating each remote control changeover switch. It is designed to detect the current component flowing through the cable insulator.
かかる回路素子には、遠隔切り換えスイッチに並列に組
まれたバイパスコンデンサを存し、電流成分の内交流成
分をバイパスさせ、直流成分のみを電流検出手段に取り
込めるようにしている。Such a circuit element includes a bypass capacitor arranged in parallel with the remote changeover switch, so that the alternating current component of the current components is bypassed, and only the direct current component can be taken into the current detecting means.
さらに、かかる直流成分検出系に対して並列に貫通型変
流器を含ませることによって金属ソース回路の零相電流
のモニターをも可能にする。Furthermore, by including a feedthrough current transformer in parallel with such a DC component detection system, it is also possible to monitor the zero-sequence current of the metal source circuit.
第１図は、本発明にがかる単芯ケーブル線路の区間分離
形絶縁診断法の好ましい実施例を示したもので、ここで
最も特徴付けられるのは、１つのクロスボンド区間の区
切りとし且つ接地位置となる接続部として絶縁接続部２
を採用している点である。FIG. 1 shows a preferred embodiment of the section-separated insulation diagnosis method for single-core cable lines according to the present invention. Insulated connection part 2 as the connection part
The point is that it uses
かかる接地位置の絶縁接続部２では、縁切り部２ａを境
にした両側で各相間を導通する接地用ボンド線５ａ、５
ｂにより各側毎に別々に接地し、もってクロボンド区間
毎に縁切り部２ａによって電気的に絶縁して分離した金
属シース回路を形成する。In the insulated connection part 2 at the grounding position, grounding bond wires 5a, 5 are connected on both sides of the edge cutting part 2a to conduct between each phase.
b is separately grounded on each side, thereby forming a metal sheath circuit that is electrically insulated and separated by the edge cut portion 2a for each black bond section.
各列で接地された絶縁接続部２では、各側の接地用ボン
ド！５ａ、５ｂに対して、その絶縁接続部２と大地間で
別個の回路素子５ａ、５ｂが挿入される。In the insulated connection part 2 grounded in each row, the grounding bond on each side! 5a, 5b, a separate circuit element 5a, 5b is inserted between its insulating connection 2 and ground.
一方の接地用ボンド線５ａに挿入される回路素子６ａは
、第２図に具体的に示したように、ボンド線５ａに直列
に挿入されたバイパスコンデンサー７と、該バイパスコ
ンデンサー７を挟んでボンド線５ａに並列に挿入された
遠隔操作切り換えスイッチ８（ｂ接点）とを有したもの
である。The circuit element 6a inserted into one of the grounding bond wires 5a is bonded to a bypass capacitor 7 inserted in series with the bond wire 5a with the bypass capacitor 7 in between, as specifically shown in FIG. It has a remote control changeover switch 8 (b contact) inserted in parallel to the wire 5a.
また、他方の接地用ボンド線５ｂに挿入される回路素子
６ｂは、前記の回路素子６ａと同様にして、ボンド１５
ｂに直列に挿入されたバイパスコンデンサー７と、該バ
イパスコンデンサー７を挟んでボンド線５ｂに並列に挿
入された遠隔操作切り換えスイッチ８（ｂ接点）とを有
し、さらにバイパスコンデンサー７を挟んでボンド綿５
ｂに並列に結線された微少電流測定器１０が備わったも
のである。９は直流成分測定用抵抗を示し、その前にあ
るり、Ｃは交流成分をバイパスさせるためのものであり
、交流の基本波及びその変調波成分をバイパスさせ、基
本波の影響を取り除くようにする。Further, the circuit element 6b inserted into the other grounding bond wire 5b is connected to the bond 15 in the same manner as the circuit element 6a described above.
A bypass capacitor 7 is inserted in series with the bond wire 5b, and a remote control changeover switch 8 (b contact) is inserted in parallel with the bond wire 5b with the bypass capacitor 7 in between. cotton 5
b is equipped with a minute current measuring device 10 connected in parallel. 9 indicates a resistor for measuring the DC component, and C in front of it is for bypassing the AC component, bypassing the fundamental wave of the AC and its modulation wave component, and removing the influence of the fundamental wave. do.
かかる遠隔操作切り換えスイッチは、ｂ接点として絶縁
診断時以外は閉成しておくものである。Such a remote control changeover switch serves as a b contact and is kept closed except during insulation diagnosis.
従って、１つのクロスボンド区間では、左側の絶縁接続
部２の右側の接地用ボンド線５ｂと、右側の絶縁接続部
２の左側の接地用ボンド線５ａとで接地され、２列まで
の絶縁接続部のクロスボンド線接続部を介して３相が一
括して接地され、運転に供せられる。Therefore, in one cross bond section, the right ground bond wire 5b of the left insulated connection part 2 and the left ground bond wire 5a of the right insulated connection part 2 are grounded, and up to two rows of insulated connections All three phases are grounded together through the cross-bond wire connection in the section and used for operation.
一方、測定時には、遠隔操作切り換えスイッチ８の瞬時
の開成により、何れの側の接地用ボンド１５ａ、５ｂも
バイパスコンデンサー７を介して接地するものとする。On the other hand, during measurement, the grounding bonds 15a and 5b on either side are grounded via the bypass capacitor 7 by instantaneously opening the remote control changeover switch 8.
このようにバイパスコンデンサー７を介して接地するこ
とにより、直流回路としてみれば金属シース１が大地か
ら浮いた（絶縁）状態となる。By connecting the metal sheath 1 to the ground via the bypass capacitor 7 in this way, the metal sheath 1 is placed in a floating (insulated) state from the ground when viewed as a DC circuit.
そして、各列の絶縁接続部のクロスボンド接続を解体せ
ずに３相一括接地となるため、３相一括の電流測定とな
っているので、完全な対称３相ならば通常測定抵抗９に
は電流が流れないが、いずれかのケーブルの絶縁体に異
常があれば、電流の不平衡分が測定抵抗９に流れ、これ
を高感度の増幅器を持った微少電流測定器ＩＯにより検
出測定し、この結果を伝送系へ送り、もって、１つのク
ロスボンド区間あたりの絶縁異常の有無を確認するもの
である。Since the three phases are grounded all at once without disassembling the cross bond connections of the insulated connections in each row, the current is measured for all three phases, so if the three phases are completely symmetrical, the measurement resistor 9 is If no current flows, but there is an abnormality in the insulation of either cable, an unbalanced portion of the current flows to the measuring resistor 9, which is detected and measured by a minute current measuring device IO equipped with a highly sensitive amplifier. This result is sent to the transmission system to confirm the presence or absence of insulation abnormality per cross bond section.
ケーブルがＣ■ケーブルの場合には、水トリーが発生し
ているときに絶縁体に直流成分の電流が流れるので、こ
れを測定器１０により検出することにより、ケーブルの
劣化判定にも利用される。If the cable is a C cable, a DC component current flows through the insulator when water treeing occurs, and this can be detected by the measuring device 10 and used to determine cable deterioration. .
第４図は、接地位置の絶縁接続部２の片側接地用ボンド
線５ｂに挿入される回路素子の別な構成例を示す。FIG. 4 shows another configuration example of a circuit element inserted into one side of the grounding bond wire 5b of the insulated connection portion 2 at the grounding position.
即ち、この回路素子６ａは、ボンド線５ｂに直列に挿入
されたバイパスコンデンサー７とａ 接点の遠隔操作切
り換え切り換えスイッチ８′とを有し、これらバイパス
コンデンサー７及び遠隔操作切り喚え切り換えスイッチ
８′を挟んでボンド線５ｂに並列に接続するａ接点の遠
隔操作切り換えスイッチ８を備えている。また、バイパ
スコンデンサー７を挟んでボンド線５ｂに並列に接続す
る微少電流測定器ｌＯを備えさせたものである。That is, this circuit element 6a has a bypass capacitor 7 inserted in series with the bond wire 5b and a remote control switch 8' with an a contact. A remote control changeover switch 8 with an a contact point is provided in parallel to the bond wire 5b with the terminal in between. Further, a minute current measuring device IO is provided which is connected in parallel to the bond line 5b with the bypass capacitor 7 interposed therebetween.
さらに、ｂ接点の遠隔操作切り換えスイッチ８の系統に
は貫通型変流器１）が貫通配置され、これを微少電流測
定器１０と接続しである。Further, a through-type current transformer 1) is disposed through the system of the B-contact remote control changeover switch 8, and is connected to a minute current measuring device 10.
このような回路素子６Ｃによれば、運転時にはａ接点の
遠隔操作切り換えスイッチ８′を開放してｂ接点の遠隔
操作切り換えスイッチ８を閉じて置くことでボンド線５
ｂの直接接地が図られる。According to such a circuit element 6C, during operation, the bond wire 5 can be switched by opening the a contact remote control changeover switch 8' and closing the b contact remote control changeover switch 8'.
b is directly grounded.
このようにすれば、常時運転状態で１クロスボンド区間
の零相電流をモニターできる。即ち、零相電流は、対称
３相のときには殆ど零であるが、ケーブル絶縁体の異常
があれば、零相電流の不平衡成分が接地用ボンド線５ｂ
に流れ、これを貫通型変流器１）で槍出し、微少電流測
定器１０で測定することができる。また、ｂ接点の遠隔
操作切り換えスイッチ８を開放してａ接点の遠隔操作切
り換えスイッチ８′を閉じれば、前述した回路素子６ｂ
と同様の絶縁診断が行える。In this way, the zero-sequence current in one cross-bond section can be monitored under constant operation. In other words, the zero-sequence current is almost zero when the three phases are symmetrical, but if there is an abnormality in the cable insulation, the unbalanced component of the zero-sequence current flows into the grounding bond wire 5b.
The current flows through the through-type current transformer 1) and can be measured using the minute current measuring device 10. Furthermore, if the B contact remote control changeover switch 8 is opened and the A contact remote control changeover switch 8' is closed, the above-mentioned circuit element 6b
Insulation diagnosis similar to can be performed.
以上のようにして、クロスボンド方式単芯ケーブル線路
の区間分離絶縁診断を行う本発明の方法によって得られ
る作用・効果は次の通り。As described above, the functions and effects obtained by the method of the present invention for diagnosing the section separation and insulation of a cross-bonded single-core cable line are as follows.
■ クロスボンド接続を解体することなく３相一括して
遠隔操作切り換えスイッチの操作によって絶縁診断を行
うため、短時間でケーブル線路の絶縁診断が行え、ケー
ブル線路の運転休止も短い時間で済む。■ Insulation diagnosis is performed for three phases at once by operating a remote control switch without dismantling the cross-bond connection, so insulation diagnosis of cable lines can be performed in a short time, and cable line operation can be stopped for a short time.
■ １つのクロスボンド区間毎に独立した金属ンース回
路を形成して３相一括して絶縁診断を行うので、課電電
圧の基本波の影響を受けることなくケーブルの絶縁異常
分布をクロスボンド区間毎に正確に把握できる。■ Since an independent metal ground circuit is formed for each cross bond section and insulation diagnosis is performed for all three phases at once, the cable insulation abnormality distribution can be checked for each cross bond section without being affected by the fundamental wave of the applied voltage. can be accurately grasped.
■ 回路素子として直流成分検出系と並列に貫通型変流
器を含ませることによって、零相電流もクロスボンド区
間毎に分離して測定でき、而もその測定は線路の運転状
態で行えるので、ケーブル絶縁のモニターが可能となり
、このモニターによって絶縁異常が推定された区間のみ
を直流成分検出系に切り換えて絶縁診断を行えば良くな
り、診断の労力軽減を図れる。■ By including a feedthrough current transformer as a circuit element in parallel with the DC component detection system, zero-sequence current can be measured separately for each cross bond section, and the measurement can be performed while the line is in operation. This makes it possible to monitor cable insulation, and it is only necessary to switch to the DC component detection system for insulation diagnosis in sections where an insulation abnormality is estimated by this monitor, thereby reducing the labor involved in diagnosis.
４、4,
第１図は本発明により区間分離絶縁診断ｍ能を具備させ
たクロスボンド方式単芯ケーブル線路の一実施例を示す
説明図、第２図乃至第４図は同線路に使用される回路素
子の例示す説明図である。
第５図は一般的なりロスボンド方式単芯ケーブル線路を
示す説明図、第６図及び第７図は従来のクロスボンド方
式ケーブル線路に対する絶縁診断例を示す説明図である
。符号において、■はケーブル金属シース、２は接地に
供する絶縁接続部、３はクロスボンド接続に供する絶縁
接続部、４はクロスボンド線、５ａ、５ｂは接地用ボン
ド線、６ａ、６ｂ、６ｃは回路素子、７はバイパスコン
デンサー、８は遠隔操作操作切り換えスイッチ（ｂ接点
）、８′は遠隔操作操作切り換えスイッチ（ａ接点）、
９は直流成分測定用抵抗、１０は微少電流測定器、１）
は貫通型変流器である。FIG. 1 is an explanatory diagram showing an embodiment of a cross-bonded single-core cable line equipped with section separation insulation diagnosis function according to the present invention, and FIGS. 2 to 4 show circuit elements used in the line. It is an explanatory diagram showing an example. FIG. 5 is an explanatory diagram showing a general cross-bond type single-core cable line, and FIGS. 6 and 7 are explanatory diagrams showing an example of insulation diagnosis for a conventional cross-bond type cable line. In the symbols, ■ is the cable metal sheath, 2 is the insulated connection part for grounding, 3 is the insulated connection part for cross bond connection, 4 is the cross bond wire, 5a and 5b are the bond wires for grounding, and 6a, 6b, and 6c are the bond wires for grounding. Circuit elements: 7 is a bypass capacitor, 8 is a remote control switch (b contact), 8' is a remote control switch (a contact),
9 is a resistor for measuring DC components, 10 is a minute current measuring device, 1)
is a feed-through current transformer.
Claims (3)
ロボンドの区間の区切りとし且つ接地をとる接続部を絶
縁接続部とし、該接地位置の絶縁接続部に対してその両
側で各相間を導通する接地用ボンド線により各側毎に別
々に接地してクロボンド区間毎に分離した金属シース回
路を形成し、各接地用ボンド線において遠隔操作切り換
えスイッチを含む回路素子を挿入し、且つ１つのクロス
ボンド区間においては片側の絶縁接続部における接地用
ボンド線の回路素子に電流測定手段を含ませ、もって各
遠隔操作切り換えスイッチの操作により各クロスボンド
区間毎に３相一括してケーブル絶縁体に流れる電流成分
を検出するようにしたことを特徴とするクロスボンド方
式単芯ケーブル線路の区間分離形絶縁診断法。(1) The connection part that separates the cross-bond sections before and after multiple cross-bonded insulated connections and is grounded is an insulated connection part, and conduction is established between each phase on both sides of the insulated connection part at the grounding position. A separate metal sheath circuit is formed for each black bond section by separately grounding each side with a grounding bond wire, and a circuit element including a remote control switch is inserted in each grounding bond wire, and one cross In the bond section, a current measuring means is included in the circuit element of the grounding bond wire at the insulated connection on one side, so that the current flows to the cable insulator in three phases at once for each cross bond section by operating each remote control changeover switch. A section-separated insulation diagnosis method for cross-bonded single-core cable lines, which is characterized by detecting current components.
並列に組まれたバイパスコンデンサを含む請求項（１）
記載の区間分離形絶縁診断法。(2) Claim (1) wherein the circuit element includes a bypass capacitor arranged in parallel with the remote control changeover switch.
The section-separated insulation diagnostic method described.
配された貫通型変流器を含む請求項（１）または（２）
記載の区間分離形絶縁診断法。(3) Claim (1) or (2) wherein the current measuring means includes a feedthrough current transformer arranged in parallel with the DC component detection system.
The section-separated insulation diagnostic method described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29848389A JPH03158774A (en) | 1989-11-16 | 1989-11-16 | Insulation diagnostic method of section separating type for single cored cable line of cross-bond system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29848389A JPH03158774A (en) | 1989-11-16 | 1989-11-16 | Insulation diagnostic method of section separating type for single cored cable line of cross-bond system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03158774A true JPH03158774A (en) | 1991-07-08 |
Family
ID=17860288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29848389A Pending JPH03158774A (en) | 1989-11-16 | 1989-11-16 | Insulation diagnostic method of section separating type for single cored cable line of cross-bond system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03158774A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100758483B1 (en) * | 2006-03-17 | 2007-09-12 | 엘에스전선 주식회사 | Grinding device protecting structure for power electric transmissionline using sheath current reduction |
| JP4628489B1 (en) * | 2010-05-27 | 2011-02-09 | 和代 今野 | Binder with file for storing documents |
-
1989
- 1989-11-16 JP JP29848389A patent/JPH03158774A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100758483B1 (en) * | 2006-03-17 | 2007-09-12 | 엘에스전선 주식회사 | Grinding device protecting structure for power electric transmissionline using sheath current reduction |
| JP4628489B1 (en) * | 2010-05-27 | 2011-02-09 | 和代 今野 | Binder with file for storing documents |
| JP2011245764A (en) * | 2010-05-27 | 2011-12-08 | Kazuyo Konno | Binder with document housing file |
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