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For drive ATV630, Is there any drawback on the variable speed drive by increasing parameter of ground fault GRFL?

For drive, if an earth leakage of value is high,then you increase the level of percent for GRFL. It has no effect on drive,as our drive has SCF1 and SCF3 to protect the drive 
if indeed external schematic cause some high current. But the high leakage current can  cause any harm/drawback on motors
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