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Tasks
WARNING!
When you connect voltage to the supply unit, the DC busbars and the converters connected
to the DC bus will become energized.
WARNING!
Converter units with a DC switch-disconnector: Some types of converter modules can be
energized through a charging circuit even if the DC switch-disconnector is open or the DC
fuses are removed.
Converter units without a DC switch-disconnector: If the converter unit only has DC fuses
without a switch fuse, all the converter units with the DC fuses in position will be energized
when the main breaker/contactor closes. To prevent this, remove the fuses from the con-
verter units which are to remain de-energized before you connect the voltage. Do not install
or remove DC fuses when the main breaker/contactor of the supply unit is closed (DC
busbars are energized).
If the drive is equipped with a main switch-disconnector (option +F253): Close the main discon-
necting device of the drive system.
Close the auxiliary voltage switch [Q21] of the drive supply unit. The converter control unit will
be powered.
Do not close the main circuit breaker [Q1] (option +F255) or the main contactor [Q2] (option
+F250) of the drive supply unit! You must not energize the drive DC bus at this time.
Setting the parameters
Set the DC/DC converter parameters. Refer to chapter Start-up in
program firmware manual (3AXD50000024671
Charging the DC/DC converter and connecting voltage to the converter
Make sure that the energy storage disconnecting device is open.
WARNING!
Always keep the energy storage disconnected from DC/DC converter until the DC/DC
converter is charged.
Start the supply unit and close the main contactor [Q2] (option +F250) or the main circuit
breaker [Q1] (option +F255) of the drive supply unit.
Power up and charge the DC/DC converter:
DC/DC converter with the DC switch-disconnector [Q11] (option +F286):
1. Close the DC/DC converter charging switch [Q10.x]. The DC/DC converter disconnected in-
dicator light [P12.x] goes off.
2. After the Charging OK indicator light [P11.x] comes on, close the DC switch-disconnector
[Q11].
3. Open the DC/DC converter charging switch [Q10.x].
Note: The charging switch must be open before you can start the DC/DC converter.
DC/DC converter without DC switch-disconnector (without option +F286):
1. Start the supply unit and close the main contactor [Q2] (option +F250) or the main breaker
[Q1] (option +F255) of the drive supply unit. The DC/DC converter is energized and gets
charged.
Connecting the energy storage to the DC/DC converter
Set parameter 120.12 Run enable 1 to Off. This makes sure that the DC/DC converter does not
start automatically or unexpectedly after you connect the energy storage.
Set the control panel to local control mode with the Loc/Rem key.
Make sure that the energy storage voltage is less than the drive DC link voltage.
WARNING!
Do not close the energy storage disconnecting device if the DC/DC converter is not con-
nected to the drive DC link or not ready to use.
Close the energy storage disconnecting device. The load disconnected indicator [P13.x] goes off.
DC/DC converter control
[English]).
Start-up 85
12
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