Delta And Tt Systems; Emc Filter; Ground-To-Phase Varistor - ABB ACH580-01 Hardware Manual

116 Electrical installation – IEC
Checking the compatibility with IT (ungrounded), corner-
grounded delta, midpoint-grounded delta and TT systems


EMC filter

A drive with the internal EMC filter connected can be installed to a symmetrically
grounded TN-S system. If you install the drive to another system, you may need to
disconnect the EMC filter. See sections
phase varistor: TN-S, IT, corner-grounded delta and midpoint-grounded delta
systems on page 117, and
page 118.
WARNING! Do not install a drive with the EMC filter connected to a system
that the filter is not suitable for. This can cause danger, or damage the drive.
Note: When the internal EMC filter is disconnected, the EMC compatibility of the
drive is considerably reduced. See section
on page 288.


Ground-to-phase varistor

A drive with the ground-to-phase varistor connected can be installed to a
symmetrically grounded TN-S system. If you install the drive to another system, you
may need to disconnect the varistor. See sections
ground-to-phase varistor: TN-S, IT, corner-grounded delta and midpoint-grounded
delta systems
page 118.
WARNING! Do not install a drive with the ground-to-phase varistor connected
IEC
to a system that the varistor is not suitable for. If you do, the varistor circuit can
be damaged.
Guidelines for installing the drive to a TT system
on page 117, and Guidelines for installing the drive to a TT system
When to disconnect EMC filter or ground-to-
EMC compatibility and motor cable length
When to disconnect EMC filter or
on
on