Shutting Down The Drive For Maintenance; Connecting A Grounding Set - ABB ACS580MV Hardware Manual

Shutting down the drive for maintenance

DANGER
Hazardous voltages!
For work in the medium voltage circuit of the drive the connection of grounding
equipment at the appropriate locations is a must. The grounding equipment ensures
that hazardous voltages cannot be fed into the drive neither from the main power supply
nor the motor.

Connecting a grounding set


Before starting to work on the drive, you must ground the three input and three output
terminals in the terminal unit (TEU). Always ground the drive on both sides, i.e. on supply
and motor side. Grounding on motor side is needed to avoid induced voltage from a
spinning rotor or malfunction of MSS.
For this purpose, two grounding harnesses are needed.
WARNING
MSS cannot connect to ground in case of MB is closed.
Grouding of MSS on the motor side would lead to a direct short circuit when MB is
closed. This could result in death, serious injury, or severe damage to the system.
•
Grounding hamess is mandatory when converter is in maintenance.
•
An isolator at the output of converter is recommended for safety purpose.
Maintenance 55