JPH0219086U

JPH0219086U -

Info

Publication number: JPH0219086U
Application number: JP9285588U
Authority: JP
Priority date: 1988-07-12
Filing date: 1988-07-12
Publication date: 1990-02-08

Description

[Brief explanation of drawings]

第１図は、本考案の実施例を示す配置図である
。記号の説明は下記の通り、１……鉄塔、鉄柱、
コンクリート柱等の支持物、２……接地線、３…
…左側架空地線、４……右側架空地線、５……判
定器、表示器、６，７，８……電流検出器、９…
…支持点、Ｉ１……電流検出器６の出力、Ｉ２…
…電流検出器７の出力、Ｉ３……電流検出器８の
出力、第２図は、本考案を示すブロツク図である。記号の説明は下記の通り、Ｉ１……電流検出器
６の出力、Ｉ２……電流検出器７の出力、Ｉ３…
…電流検出器８の出力または、Ｉ１＋Ｉ２＋Ｉ３
＝０の式より算出した出力、Ｐ１……Ｉ１をＩ３
によつて同期整流した出力、Ｐ２……Ｉ１をＩ２
によつて同期整流した出力。 FIG. 1 is a layout diagram showing an embodiment of the present invention. The explanation of the symbols is as follows: 1...steel tower, steel pole,
Supports such as concrete columns, 2... Grounding wire, 3...
...Left side overhead ground wire, 4...Right side overhead ground wire, 5...Judgment device, indicator, 6, 7, 8...Current detector, 9...
...Support point, I1... Output of current detector 6, I2...
...Output of current detector 7, I3...Output of current detector 8. FIG. 2 is a block diagram showing the present invention. The explanation of the symbols is as follows: I1...output of current detector 6, I2...output of current detector 7, I3...
...output of current detector 8 or I1+I2+I3
Output calculated from the formula =0, P1...I1 is I3
Output synchronously rectified by P2...I1 by I2
Output synchronously rectified by

補正昭６３．１１．７実用新案登録請求の範囲を次のように補正する
。Amendment November 7, 1983 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】送電線の架空地線の鉄塔の両側に、電流検出器
を取り付け、これによつて得られた出力をそれぞ
れＩ１，Ｉ２とし、支持点より大地に流れる電流
Ｉ３をＩ１とＩ２の和から求めるか、または、架
空地線より大地に流れる電流の通路に、電流検出
器を取り付け、得られた出力をＩ３とし、さらに
、Ｉ３を同期信号とし、Ｉ１，Ｉ２、を同期整流
して得られた出力を判定回路に入れ、事故点が支
持点より右側、左側、支持点そのもの、の３つの
判定出力を得て、判定出力を表示する表示器を取
り付ける、方向判別型事故電流通過表示器。[Claim for Utility Model Registration] Current detectors are installed on both sides of the tower of the overhead ground wire of the power transmission line, the outputs obtained by these are respectively I1 and I2, and the current I3 flowing from the support point to the ground is Either find it from the sum of I1 and I2, or attach a current detector to the path of the current flowing from the overhead ground wire to the ground, and set the obtained output as I3.Furthermore, with I3 as the synchronization signal, I1, I2, The output obtained by synchronous rectification is input into a judgment circuit, and three judgment outputs are obtained: the fault point is on the right side, left side, and the support point itself of the support point, and a display is attached to display the judgment output.Direction discrimination type. Fault current passing indicator.

Claims

[Scope of claim for utility model registration] (1) Installing current detectors on both sides of the overhead ground wire tower of the power transmission line. Let the outputs obtained by this be I1 and I2, respectively. (2) The current I3 flowing from the support point to the ground is I1
+I2+I3=0, or by installing a current detector on the path of the current flowing from the overhead ground wire to the ground, and using the obtained output as I1.
3. (3) Use one of I1, I2, and I3 as a synchronous signal, and synchronously rectify the remaining two. (4) Insert the output obtained in the above (3) into the judgment circuit to obtain three judgment outputs: the accident point is on the right side of the support point, on the left side, and on the support point itself. (5) Install a display to display the judgment output. This is a direction-discriminating type fault current passage indicator that uses the above five items at the same time.