Start-Up Procedure; Basic Checks With No Voltage Connected - ABB ACS800 Hardware Manual

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Start-up procedure

This section instructs how to start-up the ACS800-07 drive. The instructions do not
cover all possible tasks of all possible variants of the drive as the compositon of the
make-to-order drives vary. Always refer to the delivery-specific circuit diagrams
when performing the drive start-up. The device designations in square brackets, for
example [Q10], refer to the designations used in the circuit diagrams typically.
WARNING! Only qualified electricians are allowed to carry out the work described in
this chapter. Read the chapter
the safety instructions can cause injury or death.
Action
WARNING! Ensure that the disconnector of the supply transformer is
locked in the open position, ie, no voltage is, or cannot be connected to
drive inadvertently. Check also by measuring that there is no voltage
connected.
Check that the main disconnecting device of the supply unit is open:
- Drives with a main breaker [Q1] (option +F255): The breaker is in the
withdrawn position (racked out).
- Drives with a main switch-disconnector (option +F253): The switch is in
the open position.
- Other drives (no option +F253 or +F255): The main switch
disconnector is locked in the open position.

Basic checks with no voltage connected

If the unit is equipped with a main breaker [Q1], 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
Ensure that the selectivity condition is fulfilled, ie, 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
As a rule of thumb, this should be set to the rated AC current of the
module.
Peak current limit
As a rule of thumb, this should be set to a value 3 - 4 times the rated AC
current of the module.
Check the settings of any adjustable relays and breakers/switches in the
auxiliary circuits.
Disconnect any unfinished or unchecked 230/115-VAC cables that lead
from the terminal blocks to the outside of the equipment.
Locate the PPCS branching unit(s) (APBU-xx). Enable memory backup
battery by setting actuator 6 of switch S3 to ON.
Check the voltage setting of the auxiliary voltage transformer of the
drive [T10].
Check the voltage setting of the auxiliary voltage transformer in the DSU
module.
Installation checklist and start-up
Safety instructions before you start the work. Ignoring
Additional information
Optional device (+F255). See the
delivery specific circuit diagrams and
the manuals of the breaker.
Composition varies. See delivery
specific circuit diagrams.
As standard, memory backup is
switched off to save the battery.
See page 96.
See page 97.