Auxiliary Power Supply Configurations - ABB ACS1000i User Manual

3.3.2. Auxiliary power supply configurations

The total auxiliary power demand of the drive includes:
– Auxiliary power for the cooling system,
– Auxiliary power for the control hardware and the gate units which are used to trigger the
power semiconductors.
The total auxiliary power can be fed to the drive in the following two ways:
– Through a common power supply
• The total auxiliary power is supplied to the drive by a three-phase AC power supply.
• If the power supply is interrupted, drive internal batteries provide a backup for the
control system, thus enabling the drive to ride-through and/or to perform a
controlled shutdown.
– Through separate power supplies
• The auxiliary power is supplied to the drive by a three-phase AC power supply and by
an UPS to a separate one-phase AC or DC input.
• Feeding the control power separately by an UPS has the advantage that the main
control hardware will remain energized, the full ride-through capabilities of the drive
can be used, and the communication to a higher-level control system will not be lost
in the event of an auxiliary power outage.
IMPORTANT! The power feed for the auxiliary supply must be protected with a suitable
circuit protection rated for the inrush current.
– For more information on the auxiliary power interface of the drive, see "Appendix D -
Wiring diagrams".
– For information on the rated voltage(s) and current(s), see the rating plate of the drive.
PRODUCT
ACS1000i
DOCUMENT KIND
User manual
POWER ELECTRONICS AND CABINET FEATURES
DOCUMENT ID.
3BHS206977 E01
REV. LANG. PAGE
J en 24/146