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如何檢測接地故障檢測
SINAMICS G120: PM230, PM240, PM250, PM260 and PM340 功率模塊的接地故障檢測問題,接地故障檢測可能出現的錯誤:
在沒有負載的情況下,如果功率模塊的輸出電纜達到最大長度,且開關頻率在8K以上,變頻器和電機的某相接地故障
會檢測不到,裝置繼續運行.
如果電機加速,故障會馬上檢測到,然后報過流故障代碼( 代碼為F0001)
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