3BHS842007 E01 REV C
ACS6080
USER MANUAL
209/238
09 PREVENTIVE AND CORRECTIVE MAINTENANCE
Procedure
1.
Shut down the drive according to the established procedures.
IMPORTANT!
DO NOT switch off the auxiliary voltage.
For general information on de-energizing the drive, see “De-
energizing the drive locally” on page 143.
2.
Use the telescopic insulating pole (Fig. 9-17) to connect and tighten
the enclosure ground clamp to the ground ball stud of the PE
ground busbar.
3.
Connect the busbar ground clamps to the ground ball studs of the
phase busbars in the following sequence:
• Busbars for the cables to the secondary transformer windings
(1 in Fig. 9-19)
• Busbars for the motor cables (2 in Fig. 9-19)
• Busbars in the INU (3 in Fig. 9-19)
Figure 9-18 Overview of grounding the drive - INU1 is shut down (A) and INU2 is
shut down (B). Numbers indicate the connection sequence.
LSU2
LSU1
INU1
INU2
TEU1
COU1
M
A
B
1
1
2
2
3
3
