ABB ACS580-01 - Page 12

28 EN – R1…R4 Quick installation guide
R1-
R4
R5
R6-
R9
EN
DA
DE
ES
FI
FR
IT
NL
PL
PT
RU
SV
TR
ZH
 Ground-to-phase varistor
The ground-to-phase varistor is not suitable for use on an IT (ungrounded) system.
Disconnect the ground-to-phase varistor before connecting the drive to the supply
network. Check the table on page 28.
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.
Check from the table below if you have to disconnect the EMC filter (EMC) or ground-
to-phase varistor (VAR). For instructions on how to do this, see page 29.
Frame
sizes
EMC
filter
(EMC)
Ground-
to-phase
varistor
(VAR)
Symmetrically
grounded TN
systems (TN-S
systems)
1
Corner grounded
TN systems
2
IT systems
(ungrounded or
high-resistance
grounded [>30
ohms])
3
R1…R3 EMC
(1 screw)
- Do not disconnect Disconnect Disconnect
-VAR
(1 screw)
Do not disconnect Disconnect Disconnect
R4 EMC
(2 screws)
- Do not disconnect Frame R4 cannot
be used in corner
grounded TN
systems.
Disconnect
-VAR
(1 screw)
Do not disconnect Disconnect
1 2 3
Drive
PE
N
L3
L2
L1
Drive Drive
PE
L3
L2
L1
L3
L2
L1