ABB ACH480 Series - Page 91

WARNING!
Do not install the metal EMC screw in systems other than the symmetrically
grounded TN-S system. It can cause danger, or damage to the drive.
Earthing systems and factory default EMC or VAR screwFactory
default screw
material
Screw
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
systems, i.e, center
grounded-wye (A)
Maintain the plastic
screw.
Maintain the plastic
screw.
Can install the metal
screw.
1)
PlasticEMC
Remove the metal
screw.
Maintain the metal
screw.
Maintain the metal
screw.
Frames R1, R3,
R4: metal
VAR
Maintain the plastic
screw.
Maintain the plastic
screw.
Maintain the plastic
screw.
Frame R2: plastic
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)
If you are concerned with EMC issues, you can install the metal screw and connect the EMC filter. The metal
screw is included in the drive delivery.
Electrical installation – North America 91