ABB ACH580 Series Installation, Operation And Maintenance Manual page 14

14
Checking the compatibility of EMC filters with IT (ungrounded), Corner-grounded
delta, Midpoint-grounded delta, and TT systems
EMC filter
A drive with the EMC filter connected can be installed to a symmetrically grounded
TN-S system. If you install the drive to another system type, you may need to
disconnect the EMC filter. Refer to the following sections of the
Hardware
• When to disconnect EMC filter or ground-to-phase varistor: TN-S, IT,
Corner-grounded delta, and Midpoint-grounded delta systems
• Guidelines for installing the drive to a TT system
WARNING! Do not install the drive with the EMC filter connected to a system type
that the filter is not suitable for. This can cause danger, or damage the drive.
Note: When the internal EMC filter is disconnected, the drive EMC compatibility is
considerably reduced. Refer to the EMC compatibility and motor cable length section
of the
3AXD50000037066.
Ground-to-phase varistor (MOVs)
A drive with the ground-to-phase varistor connected can be installed into a
symmetrically grounded TN-S system. If you install the drive into another system,
you may need to disconnect the varistor. Refer to the following sections of the
ACH580-31 Drives Hardware
• When to disconnect EMC filter or ground-to-phase varistor: TN-S, IT,
Corner-grounded delta, and Midpoint-grounded delta systems
• Guidelines for installing the drive to a TT system
WARNING! Do not install the drive with the ground-to-phase varistor connected to a
system that the varistor is not suitable for. If you do, the varistor circuit can be
damaged.
WARNING! If the drive will be connected on an IT system (ungrounded or
high-resistance-grounded [over 30 ohms]), make sure that neither the EMC filter nor
the ground-to-phase varistor are connected, that is, the metal screws must not be
installed.
If the drive will be connected on a corner-grounded TN system, make sure that the
EMC filter is not connected, that is, the metal screws must not be installed.
Connections with metal screws in these systems can cause danger or damage.
ACH580 Ultra-Low Harmonic Drives Installation
ACH580 Ultra-Low Harmonic Drives Installation, Operation and Maintenance Manual
manual, publication number 3AXD50000037066:
ACH580-31 Drives Hardware manual, publication number
manual, publication number 3AXD50000037066:
ACH580-31 Drives