ABB ACS2000 User Manual page 153

4 Rack-out, lock-out,
ground and tag-out the
MV switchgear.
5 Switch off all auxiliary
voltages from external
sources.
ACS2000 User manual
DANGER
The grounding switch connects the DC link of the drive to the PE
(Protective Earth) ground bus.
If maintenance on the drive that includes the removal of phase
modules is planned, the connection of grounding equipment at the
appropriate locations is a must. This is to ensure that hazardous
voltages are discharged and therefore cannot be fed into the drive
from the main power supply or from the motor.
Note: For drives with the integral input contactor disconnect
option installed, move the handle to the OFF position. The
integral disconnect option does not remove medium voltage
from the TEU (Terminal Entry Unit). Remove power at an
upstream source before entering the TEU. Refer to Appendix P
for detailed information.
Figure 8-2 shows an example of how the terminals of the line supply
cables (1) are grounded at the PE ground bus (2) using a 4-way
grounding set (3).
Figure 8-2 Connecting a grounding set
The drive is safely grounded, and safe access is possible.
2UEA001270 Rev. F
Chapter 8 - Local operation
Legend
1
1 Line supply cables
2 PE ground bus
3 4-way grounding set
2
3
8-15 (18)