Start-Up Procedure; Basic Checks With No Voltage Connected; Connecting Voltage To Input Terminals And Auxiliary Circuit; Starting The Supply Unit - ABB ACQ800 Series Hardware Manual

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Start-up procedure

Action
WARNING! Ensure that the disconnector of the supply transformer is
locked to open position, i.e. no voltage is, or cannot be connected to
drive inadvertently. Check also by measuring that there is no voltage
connected.

Basic checks with no voltage connected

If the unit is equipped with an air circuit breaker, check the current trip
limits of the breaker (preset at the factory).
General rule
Ensure the selectivity condition is fulfilled i.e. 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 drive.
Peak current limit
As a rule of thumb, this should be set to a value 3-4 times the rated AC
current of the drive.
Check the settings of the relays and breakers/switches of the auxiliary
circuits.
Disconnect any unfinished or unchecked 230/115 V AC cables that lead
from the terminal blocks to the outside of the equipment.

Connecting voltage to input terminals and auxiliary circuit

WARNING! When voltage is connected to the input terminals, voltage
may also be connected to the auxiliary circuits of the drive.
Make sure that it is safe to apply voltage. Ensure that:
• nobody is working on the unit or circuits that are wired from outside into
the cabinets
• cabinet doors are closed
• covers of motor terminal boxes are in place.
Close the main breaker of the supply transformer.
Close the auxiliary circuit On/Off switch (Q100) if present.

Starting the supply unit

Close the main switch/disconnector (Q1).
Units with emergency stop: Turn the Start switch on the cabinet door
from 0 into START position for 2 seconds, then release the switch and
leave it in position 1.

Checks with the supply unit running

Check the settings of the earth fault (ground fault) monitoring device (if
present).
Installation checklist and start-up
ACQ800-37 Hardware Manual
Additional information
Optional device. See the delivery-
specific circuit diagrams.
Optional devices. See delivery
specific circuit diagrams.
See chapter Electrical installation.