ABB ACS880-04F-504A-3, Hardware Manual, Page: 85 / 202

1. Stop the drive and do the steps in section Electrical safety precautions (page 16)
before you start the work.
2. Make sure that the resistor cable is connected to the resistor and disconnected
from the drive output terminals.
3. At the drive end, connect the R+ and R- conductors of the resistor cable together.
Measure the insulation resistance between the conductors and the PE conductor
with a measuring voltage of 1000 V DC. The insulation resistance must be more
than 1 Mohm.
R-
R+
ohm
PE
1000 V DC,
> 1 Mohm
Grounding system compatibility check
The standard drive with no EMC filter and the ground-to-phase varistor connected
can be installed to a symmetrically grounded TN-S system. If you install the drive to
another system, you may need to disconnect the EMC filter and ground-to-phase
varistor. See
ACS880 frames R1 to R11 EMC filter and ground-to-phase varistor
disconnecting instructions (3AUA0000125152 [English]) .
WARNING!
Do not install the drive with EMC filter E200 to a system that the filter
is not suitable for. This can cause danger, or damage the drive.
WARNING!
Do not install the drive with the ground-to-phase varistor connected to a system
that the varistor is not suitable for. If you do, the varistor circuit can be
damaged.
￭
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.
Grounding the drive module
Ground the drive module from its top back grounding hole to the cabinet frame or
from the module PE terminal to the cabinet PE busbar.
Electrical installation 85
11