JPH01115192U - - Google Patents

Info

Publication number
JPH01115192U
JPH01115192U JP1063788U JP1063788U JPH01115192U JP H01115192 U JPH01115192 U JP H01115192U JP 1063788 U JP1063788 U JP 1063788U JP 1063788 U JP1063788 U JP 1063788U JP H01115192 U JPH01115192 U JP H01115192U
Authority
JP
Japan
Prior art keywords
output
ratio
lightning arrester
bandpass filter
section
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
Application number
JP1063788U
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1063788U priority Critical patent/JPH01115192U/ja
Publication of JPH01115192U publication Critical patent/JPH01115192U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Testing Electric Properties And Detecting Electric Faults (AREA)

Description

【図面の簡単な説明】
第1図は本考案の一実施例を示す構成図、第2
図は避雷器の等価回路、第3図は電流波形図であ
る。 LA……避雷器、F1,F3……第1および第
2のバンドパスフイルタ部、RD……比率検出部
、COMP……比較器、AND……論理積部。

Claims (1)

    【実用新案登録請求の範囲】
  1. 避雷器の一端とアース間に流れる電流を検出し
    て避雷器の非直線抵抗体の劣化を検出するものに
    於て、前記検出電流を導入して夫々fおよびf
    の各周波数成分を個別に通過させて直流レベル
    に変換する第1および第2のバンドパスフイルタ
    部と、各バンドパスフイルタ部の出力V,V
    を導入して比率を演算し、V/V≧K(但し
    Kは定数)時に出力を発生する比率検出部と、前
    記第2のバンドパスフイルタ部の出力と設定値と
    を比較する比較器と、この比較器の出力と前記比
    率検出部の出力との論理積を得る論理積部を備え
    たことを特徴とする避雷器の劣化検出装置。
JP1063788U 1988-01-29 1988-01-29 Pending JPH01115192U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1063788U JPH01115192U (ja) 1988-01-29 1988-01-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1063788U JPH01115192U (ja) 1988-01-29 1988-01-29

Publications (1)

Publication Number Publication Date
JPH01115192U true JPH01115192U (ja) 1989-08-02

Family

ID=31218472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1063788U Pending JPH01115192U (ja) 1988-01-29 1988-01-29

Country Status (1)

Country Link
JP (1) JPH01115192U (ja)

Similar Documents

Publication Publication Date Title
JPH01115192U (ja)
JPS6319280U (ja)
JPS6340190U (ja)
JPH01179281U (ja)
JPS61161769U (ja)
JPS6314171U (ja)
JPS62169898U (ja)
JPH02118272U (ja)
JPH01150431U (ja)
JPH02135871U (ja)
JPS62139130U (ja)
JPS62140405U (ja)
JPS59195942U (ja) 可変交流電圧電源装置の接地検出回路
JPS63157676U (ja)
JPS6222540U (ja)
JPS6224254U (ja)
JPH01162928U (ja)
JPS61140974U (ja)
JPH01139521U (ja)
JPH03104870U (ja)
JPH02118279U (ja)
JPS61115975U (ja)
JPH027578U (ja)
JPH01143286U (ja)
JPH02139495U (ja)