ABB ACH580-01 Series Quick Installation And Start-Up Manual page 36

34 EN – R6...R9 Quick installation guide
WARNING! Do not install the drive with the ground-to-phase varistor
connected on an IT system (an ungrounded power system or a high-
resistance-grounded [over 30 ohms] power system), otherwise the varistor circuit can
be damaged.
R0-
R3
Check from the table below if you have to disconnect the EMC filter (EMC) or
R6-
ground-to-phase varistor (VAR). For instructions on how to do this, see page 35.
R9
Frame EMC
sizes filter
(EMC)
EN
R6...R9 2 × EMC
-
DA
1
DE
ES
FI
FR
Drive
IT
NL
PL
PT
RU
SV
TR
ZH
Ground- Symmetrically
to-phase grounded TN
varistor systems (TN-S
systems)
(VAR)
- Do not disconnect
1 × VAR Do not disconnect Do not disconnect
2
L1
L2
L3
N
PE
Corner grounded
TN systems
1
Disconnect
3
L1
L2
L3
PE
Drive
IT systems
2
(ungrounded or
high-resistance
grounded [>30
3
ohms])
Disconnect
Disconnect
L1
L2
L3
Drive