Safety - ABB ACS 400V Instructions Manual

Safety

Warning! Only a competent electrician may install the ACS 400V.
Warning! Dangerous voltages are present when mains supply is connected. Wait at least 5
minutes after disconnecting the supply before removing the cover. Measure the voltage
at DC terminals (U
Reference Section E.
Warning! Even when the motor is stopped there are dangerous voltages present at Power Circuit
terminals U1, V1, W1 and U2, V2, W2 and U
Warning! Even when the ACS 400V is powered down, there may be dangerous external voltages
at relay terminals RO1A, RO1B, RO1C, RO2A, RO2B, RO2C.
Warning! Never attempt to repair a broken unit; contact the supplier.
Warning! The ACS 400V will start up automatically after an input voltage interruption if the
external run command is on.
Warning! When the control terminals of two or more ACS100/140/160/400/400V units are
connected in parallel, the auxiliary voltage for these control connections must be taken
from a single source which can either be one of the units or an external supply.
Warning! The heat sink may reach a high temperature (see ACS 400 User's Manual Reference
Section S, Table 11).
Warning! The ACS 400V unit with a RFI filter cannot be used in distribution networks isolated
from earth (floating networks, IT networks). Otherwise the net will be connected with the
earth potential via filter capacitors.
If the drive is connected to IT network, grounding screws and the RFI filter must be removed. Refer to
ACS 400 User's Manual Reference section I Floating Network for instructions on screw locations.
Note! For more technical information refer to ACS 400 User's Manual or contact your local ABB
supplier.
, U ) before servicing the unit. See ACS 400 User's Manual
c+ c-
, U .
c+ c-
3