ABB ACS880-11 - Page 87

R3: Do not disconnect EMC or VAR screws.
PE
L3
L2
L1
R6: Disconnect EMC DC screw. Do not disconnect EMC
AC or VAR screws.See Note 1 below.
R8: Disconnect EMC DC and VAR screws.
IT systems (ungrounded or high-resistance grounded [>30 ohms])
R3: Disconnect EMC and VAR screws.
L3
L2
L1
R6: Disconnect EMC AC, EMC DC and VAR screws.
R8: Disconnect EMC DC and VAR screws.
TT systems
R3: Disconnect EMC and VAR screws.
N
L3
L2
L1
R6: Disconnect EMC AC, EMC DC and VAR screws.
R8: Disconnect EMC DC and VAR screws.
Residual current device has to be installed in the supply
system.
Note:
• Because the EMC filter screws have been disconnec-
ted, ABB does not guarantee the EMC category.
• ABB does not guarantee the functioning of the ground
leakage detector built inside the drive.
• In large systems the residual current device can trip
without a real reason.
Note 1: Frames R3 and R6 are evaluated for use on corner-grounded systems and
midpoint-grounded delta systems by UL standards. They are not evaluated by IEC
standards for use on corner-grounded or midpoint-grounded systems.
Note 2: These are the EMC filter and varistor screws of different drive frame sizes.
Ground-to-phase varistor screwsEMC filter (options +E200 and +E202)
screws
Frame size
VAREMCR3
VAREMC AC, EMC DCR6
Electrical installation – IEC 87