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98 Electrical installation
Checking the insulation of the assembly
Supply unit
Do not make any voltage tolerance or insulation resistance tests on the supply modules as
this may cause damage. Every module has been insulation tested between the main
circuit and the chassis at the factory.
Supply cable
Check the insulation of the supply (input) cable according to local regulations before
connecting to the drive.
Checking the compatibility with IT (ungrounded) systems
The RFI filter is not suitable for use in IT (ungrounded) systems. Disconnect the filter
before connecting the drive to the supply network. For instructions on how to do this,
contact your local ABB representative.
WARNING! If a drive with an RFI filter is installed on an IT system (an
ungrounded power system), the system will be connected to earth potential
through the filter capacitors of the drive. This can cause danger, or damage the
unit.
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