JPH033133U - - Google Patents

Info

Publication number
JPH033133U
JPH033133U JP6377889U JP6377889U JPH033133U JP H033133 U JPH033133 U JP H033133U JP 6377889 U JP6377889 U JP 6377889U JP 6377889 U JP6377889 U JP 6377889U JP H033133 U JPH033133 U JP H033133U
Authority
JP
Japan
Prior art keywords
sequence current
digital relay
negative
division
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.)
Pending
Application number
JP6377889U
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 JP6377889U priority Critical patent/JPH033133U/ja
Publication of JPH033133U publication Critical patent/JPH033133U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】
第1図はCPUの故障検出機能を示す機能ブロ
ツク図、第2図はデイジタルリレーの故障検出装
置の一実施例を示すブロツク図、第3図は系統保
護システムの一例を示す概略系統図。 1……デイジタルリレー、9……CPU、9a
……逆相電流演算部、9b……正相電流演算部、
9c……除算部、9d……故障判定部。

Claims (1)

  1. 【実用新案登録請求の範囲】 デイジタルリレーにより算出される逆相電流に
    基いてデイジタルリレー自体の故障を検出するデ
    イジタルリレーの故障検出装置において、 上記デイジタルリレーが、系統の各相の電流に
    基いて正相電流を算出する正相電流算出部と、系
    統の各相の電流に基いて逆相電流を算出する逆相
    電流算出部と、上記正相電流で逆相電流を除算す
    る除算部と、この除算部による除算結果と所定値
    とを比較し、除算結果が基準値以上の場合をデイ
    ジタルリレー自体の故障と判定する故障判定部と
    を有することを特徴とするデイジタルリレーの故
    障検出装置。
JP6377889U 1989-05-31 1989-05-31 Pending JPH033133U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6377889U JPH033133U (ja) 1989-05-31 1989-05-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6377889U JPH033133U (ja) 1989-05-31 1989-05-31

Publications (1)

Publication Number Publication Date
JPH033133U true JPH033133U (ja) 1991-01-14

Family

ID=31594129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6377889U Pending JPH033133U (ja) 1989-05-31 1989-05-31

Country Status (1)

Country Link
JP (1) JPH033133U (ja)

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