Checking the compatibility with IT (ungrounded) and
corner-grounded
TN
systems
WARNING! Disconnect the internal EMC filter when installing the drive on an IT
system (an ungrounded power system or a
high-resistance-grounded
[over
30 ohms] power system), otherwise the system will be connected to ground potential
through the EMC filter capacitors. This may cause danger or damage the drive.
Disconnect the internal EMC filter when installing the drive on a corner-grounded TN
system, otherwise the drive will be damaged.
1. If you have an IT (ungrounded) system or corner-grounded TN system,
disconnect the internal EMC filter by removing the EMC screw. For 3-phase U-
type drives (with type designation ACS150-03U-), the EMC screw is already
removed at the factory and replaced by a plastic screw.
EMC
VAR
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