JPH0249328U - - Google Patents

Info

Publication number
JPH0249328U
JPH0249328U JP12572688U JP12572688U JPH0249328U JP H0249328 U JPH0249328 U JP H0249328U JP 12572688 U JP12572688 U JP 12572688U JP 12572688 U JP12572688 U JP 12572688U JP H0249328 U JPH0249328 U JP H0249328U
Authority
JP
Japan
Prior art keywords
ground fault
circuit
fault detection
frequency
variable
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
JP12572688U
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 JP12572688U priority Critical patent/JPH0249328U/ja
Publication of JPH0249328U publication Critical patent/JPH0249328U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Protection Of Static Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (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ブロツク図、
第2図は他の実施例の構成図、第3図は高圧電動
機をVVVF制御している状態図、第4図は従来
の地絡保護回路例図である。 10……Vo検出回路、11……fo検出回路
、12……f検出回路、13……設定回路、14
……演算回路、15……比較回路。

Claims (1)

    【実用新案登録請求の範囲】
  1. 可変電圧可変周波数制御される電動機の地絡検
    出装置において、地絡検出感度を地絡時の回路の
    周波数に応じて変化させることを特徴とする地絡
    検出装置。
JP12572688U 1988-09-28 1988-09-28 Pending JPH0249328U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12572688U JPH0249328U (ja) 1988-09-28 1988-09-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12572688U JPH0249328U (ja) 1988-09-28 1988-09-28

Publications (1)

Publication Number Publication Date
JPH0249328U true JPH0249328U (ja) 1990-04-05

Family

ID=31376588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12572688U Pending JPH0249328U (ja) 1988-09-28 1988-09-28

Country Status (1)

Country Link
JP (1) JPH0249328U (ja)

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