3BHS135824 ZAB E01Rev. D 49 (of 62)
Chapter 9 -
Energizing the Converter
After the insulation tests have been finished and all cables have been
connected, the next step in commissioning is to energise the converter
and to close the Main Circuit Breaker (MCB).
The first energising of the converter must be done by a qualified
electrician who has been trained in the product. During the energising
follow carefully the safety instructions given at the beginning of this
document and in the ACS 6000 User`s Manual.
Before energizing the converter, all doors and possibly removed cover
plates must be properly closed and all preparatory works such as
inspections, measurements and I/O signal tests must be done. This
means, all actions described in the previous chapters should be done
and possible defects found must be eliminated. No alarms are allowed
to be active, neither in the ACS 6000 nor in related switchgear feeders.
Instructions given in the ACS 6000 TC SW Commissioning Manual
must be followed.
9.1 Energizing the Drive
In the ACS 6000 converter, charging of the intermediate DC link is done
from auxiliary power supply by means of a charging transformer. This
allows to charge up the DC link to the nominal voltage level without the
main (HV) supply.
Note ! Never connect the ACS 6000 drive to the live supply network
before the DC link is charged up close to nominal operation level
(>4kV). See parameter group 35 (DC link control) for charging level
settings (SigParACS 6000AD_SD_INU_LXAC).
9.1.1 Charging Test
Note: Before this DC charging test is started, the MCB must be
pulled out into a TEST-position, in a way that it can be controlled
without energising the transformer !
Converter(s) must be in “Ready On” state without any active faults.
Control location needs to be local. Discharge mode must initially be with
VLU/RBU.
Start charging by pressing local "ON push button" on COU door. Charge
the DC link up to approximately 1000 V and start discharging before
MCB closing level is reached (using OFF push button). Record upper
and lower DC voltages in all of the units and compare that the values
are the same. See from the recording that charging and discharging
looks normal.
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