開關(guān)失靈1相電流監(jiān)視啟動:這個定值用來設(shè)定相電流啟動和保持的監(jiān)測水平。通常這個定值應(yīng)當(dāng)檢測到被保護(hù)斷路器上的最低電流。需要多小它就可以設(shè)置為那么低的值(低于斷路器電阻電流或是低于負(fù)荷電流)高定值和低定值電流監(jiān)測將會保證正確的動作。

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