Start-up procedure
Tasks
Safety
WARNING!
Obey the safety instructions during the start-up procedure. See Safety instructions for ACS880
liquid-cooled multidrive cabinets and modules (3AXD50000048633 [English]). Only qualified
electricians are allowed to start-up the drive.
Checks/Settings with no voltage connected
WARNING!
Ensure that the disconnector of the supply transformer is locked to the off (0) position, that
means no voltage is, or can not be, connected to drive inadvertently.
The no-load current of the IGBT supply unit must be taken into account if pretests (eg, factory tests)
are made on the IGBT supply unit by using a temporary main AC supply. The no-load current circulates
between the supply network and the LCL filter capacitors and therefore stresses the supply transformer.
To avoid supply transformer overload, the supply transformer must be dimensioned according to 15%
of IGBT supply unit nominal current. The transformer should be dedicated for the IGBT supply unit
only, no other (sensitive) load shall be connected in same transformer secondary to avoid disturbance
and malfunction.
In case a generator is used as a supply, it should be dimensioned according to the nominal current of
the IGBT supply unit.
Supply transformer
IGBT supply module
LCL filter
I(noload)
Check that the main disconnecting device (main switch-disconnector or main circuit breaker) [Q1] is
switched off.
Check the mechanical and electrical installation. See chapter Installation checklist.
Check the settings of breakers/switches in the auxiliary circuits.
Drives with a charging switch [Q3] and a DC switch-disconnector for line-up charging [Q40]: Open the
charging circuit switch [Q3] and the DC switch-disconnector for line-up charging [Q40].
If time relays, or relays with delayed make contact or break contact are used in emergency stop circuits,
check the relay time settings. See delivery-specific circuit diagrams and safety function specific docu-
mentation (if applicable).
Disconnect the unfinished or unchecked 230 V AC cables that lead from the terminal blocks to the
outside of the equipment.
Check that both circuits of STO terminals on the supply control unit are closed (IN1 and IN2 must be
connected to OUT). The supply unit cannot start is either circuit is open. Refer to the wiring diagrams
delivered with the drive and chapter .
Check that both channels of STO IN (X52) connector on IGBT supply module are connected to 24 V DC
for the supply unit to start.
118 Start-up
To Next Page
Loading...
