JPH0249327U - - Google Patents

Info

Publication number
JPH0249327U
JPH0249327U JP12572788U JP12572788U JPH0249327U JP H0249327 U JPH0249327 U JP H0249327U JP 12572788 U JP12572788 U JP 12572788U JP 12572788 U JP12572788 U JP 12572788U JP H0249327 U JPH0249327 U JP H0249327U
Authority
JP
Japan
Prior art keywords
ground fault
fault detection
frequency
variable
voltage
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
JP12572788U
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 JP12572788U priority Critical patent/JPH0249327U/ja
Publication of JPH0249327U publication Critical patent/JPH0249327U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)
  • Protection Of Static Devices (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図は高圧電動機をVVVF制御している状態
図、第3図は従来の地絡保護回路例図である。 9……V検出回路、10……f検出回路、
11……演算回路、12……設定回路、13……
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、地絡検出感度に地絡時の回路電
    圧と周波数の比を用いることを特徴とする地絡検
    出装置。
JP12572788U 1988-09-28 1988-09-28 Pending JPH0249327U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12572788U JPH0249327U (ja) 1988-09-28 1988-09-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12572788U JPH0249327U (ja) 1988-09-28 1988-09-28

Publications (1)

Publication Number Publication Date
JPH0249327U true JPH0249327U (ja) 1990-04-05

Family

ID=31376590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12572788U Pending JPH0249327U (ja) 1988-09-28 1988-09-28

Country Status (1)

Country Link
JP (1) JPH0249327U (ja)

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