ABB EN Series - Page 28

28 EN – R6…R9 Quick installation guide
R0-
R4
R6-
R9
R6-
R9
EN
DA
DE
ES
FI
FR
IT
NL
PL
PT
RU
SV
TR
ZH
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
R6…R9 EMC
(2 screws)
- Do not disconnect Disconnect Disconnect
-VAR
(1 screw)
Do not disconnect Do not disconnect Disconnect
1 2 3
Drive
PE
N
L3
L2
L1
Drive Drive
PE
L3
L2
L1
L3
L2
L1