Ground-To-Phase Varistor; Corner-Grounded And Midpoint-Grounded 690 V Delta Systems; Disconnection Table - ABB ACS880-04 Manual De Hardware

2 Update notice

Ground-to-phase varistor


The ground-to-phase varistor of the drive is not suitable for use on an IT (ungrounded)
system. Disconnect the ground-to-phase varistor before you connect the drive to the
supply network. Check the table on page 2.
WARNING! Do not install the drive with the ground-to-phase varistor connected to
an IT system (an ungrounded power system or a high-resistance-grounded [over 30
ohms] power system). The varistor circuit can be damaged.

Corner-grounded and midpoint-grounded 690 V delta systems


WARNING! Do not install the drive on a 690 V corner-grounded or midpoint-
grounded delta system. Disconnecting the EMC filter and ground-to-phase varistor
does not prevent damage to the drive.

Disconnection table


EMC filter +E200
Check from this table if you have to disconnect the EMC filter (EMC AC screw) with option
+E200 or ground-to-phase varistor (VAR screw).
Frame Symmetrically grounded
size TN systems
(TN-S systems)
TT systems
R10, R11 Do not remove EMC AC or
Note: These are the EMC filter and varistor screws of different drive frame sizes.
Frame EMC filter (+E200) screw
size
R10, R11
Corner-grounded and
midpoint-grounded
1
and
2
Do not remove EMC AC or VAR.
VAR.
1
L1
L2
L3
N
PE
Drive
2
L1
L2
L3
N
Drive
EMC AC
3
delta systems
(< 600 V)
3
L1
L2
L3
PE
Drive
L1
L2
L3
PE
Drive
Ground-to-phase varistor screw
IT systems (ungrounded or
high-resistance-grounded
4
[>30 ohms])
Remove EMC AC, VAR.
4
L1
L2
L3
Drive
VAR