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brandon_costa
20-04-2017, 06:09 PM
Lenze's new VFD (http://www.actechdrives.com/PDF/Lenze/Lenze-iSeries-Drives.pdf) at our paper plant trips on earth fault immediately on receiving a start command. It happens even when no motor and leads are connected. What could be the reason for tripping? Would adding a ground fault sensor help?

JAZZCNC
20-04-2017, 10:59 PM
The drive probably has Internal EMC filter which will need disconnecting. Probably Screw on the side but the manual should tell you.

kresimir.cihak
20-04-2017, 11:02 PM
there are 2 options not to open it.
1 use higher protection current 500mA
2 connect before protection device if possible

reason as jazzcnc mentioned EMC filter

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