ABB ACH480 - Page 95

variant. Before you connect the drive to the input power, examine the screws and
do the necessary actions shown in the table.
When to remove EMC screw or VAR screwScrew materialScrew
label
IT systems (un-
grounded or high-
resistance groun-
ded) (C)
Corner-grounded
delta (B1), mid-
point-grounded
delta (B2) and
TT (D) systems
Symmetrically
grounded TN-S sys-
tems, i.e, center-
grounded wye (A)
RemoveRemoveDo not removeMetalEMC
Do not removeDo not remove
Do not remove
1)
Plastic
RemoveDo not removeDo not removeMetalVAR
Do not removeDo not removeDo not removePlastic
A B1
B2A
C
D
L1
L2
L3
N
PE
L1
L2
L3
PE
L1
L2
L3
L1
L2
L3
N
PE
L1
L2
L3
PE
L1
L2
L3
N
1)
Can install the metal screw included in the drive delivery to connect the internal EMC filter.
For the locations of the screws, refer to Disconnecting the ground-to-phase
varistor, or connecting the EMC filter (page 96).
Electrical installation – North America 95