ABB ACS880-11 - Corner-Grounded and Midpoint-Grounded 525; When to Disconnect EMC Filter (Options +E200 and +E202) or Ground-To-Phase Varistor: TN-S, IT, Corner-Grounded Delta and Midpoint-Grounded Delta Systems and TT Systems

￭ Corner-grounded and midpoint-grounded 525…690 V delta systems
WARNING!
Do not install the drive on a 525…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.
￭ When to disconnect EMC filter (options +E200 and +E202) or
ground-to-phase varistor: TN-S, IT, corner-grounded delta and
midpoint-grounded delta systems and TT systems
Requirements for disconnecting EMC filter and varistor and additional requirements for
different electrical power systems are given below.
Symmetrically grounded TN systems (TN-S systems (ie. center-grounded wye)
Do not disconnect EMC or VAR screws.
PE
L2
L3
L1
N
Corner-grounded delta systems ≤ 600 V
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
Midpoint-grounded delta systems ≤ 600 V
86 Electrical installation – IEC