Electrical Installation - ABB ACS55 Guide De L'utilisateur

4. Electrical installation

WARNING! The work described in this chapter may only be carried out by a
qualified electrician. Follow the instructions in chapter
Ignoring the safety instructions can cause injury or death.
Make sure that the drive is disconnected from the input power during
installation. If the drive is already connected to the input power, wait for
5 minutes after disconnecting the input power.
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) or corner-grounded TN system, disconnect the
internal EMC filter by removing the EMC screw. For 3-phase U-type drives (with
type designation ACS310-03U-), the EMC screw is already removed at the factory
and replaced by a plastic one.
1
Note: In frame size R4
the EMC screw is located
to the right of terminal W2.
EMC
VAR
Electrical installation 13
Safety on page 5.