ABB ACS880-204 - Start-Up Procedure

Start-up procedure
Tasks
Safety
WARNING!
Follow the safety instructions during the start-up procedure. See Safety instructions for ACS880
multidrive cabinets and modules (3AUA0000102301 [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)
Drives with a main switch-disconnector [Q1]: Make sure the main switch-disconnector is switched off.
Drives with a main breaker [Q21]: Crank the main breaker to DISCONNECTED position.
Open the auxiliary voltage switch [Q21].
Open the charging circuit switch [Q3].
If the unit is equipped with a main breaker, set the current trip limits of the breaker. The trip limits have
been preset to generic values by the breaker manufacturer. The generic limits do not correspond the
protection requirements of the application.
For the limit rules, see below.
General rule
Make sure that the selectivity condition is fulfilled, that is the breaker trips at a lower current than the
protection device of the supplying network, and that the limit is high enough not to cause unnecessary
trips during the intermediate DC circuit load peak at start.
Long term current limit
Rule of thumb: Set to the rated AC current of the module.
Peak current limit
Rule of thumb: Set to a value 3…4 times the rated AC current of the module.
Check the mechanical and electrical installation.
Check the settings of breakers/switches in the auxiliary circuits.
150 Start-up