Connecting Emc Filter - North America; Connecting Ground-To-Phase Varistor - North America - ABB ACH580-04 Hardware Manual

IT systems (ungrounded or highresistance-grounded [>30 ohms])
Connecting EMC filter – North America
This section is valid for the UL (NEC) drive types. The internal EMC filter of the drive is
disconnected as default. If you are concerned with EMC issues, and install the drive to a
symmetrically grounded TN-S system, corner-grounded delta or mid-point-grounded delta
system, you can connect the internal EMC filter. Contact ABB for the connection instructions.
Connecting ground-to-phase varistor – North America
This section is valid the UL (NEC) drive types. The internal ground-to-phase varistor of the
drive is disconnected as default. If you install the drive to TN-S system, corner-grounded
delta or mid-point-grounded delta system, you can connect the ground-to-phase varistor.
Contact ABB for the connection instructions.
Connecting EMC filter and ground-to-phase varistor – North America 233
You can connect VAR wire.
L1
L2
L3
PE
Do not connect VAR wire.
L1
L2
L3