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Tasks
Make sure that the coolant can flow freely in all cubicles.
Close the cabinet doors.
Connecting voltage to the drive and converter control unit
Connect main AC voltage to the input terminals of the drive supply unit. (Close the main breaker of
the supply transformer.)
WARNING!
When connecting voltage to the supply unit, the DC busbars will become live, as will all the
converters connected to the DC bus.
WARNING!
Converter units with a DC switch/disconnector: Some types of the converter module may be
energized through a charging circuit even when 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 place will be energized when
the main breaker/contactor closes. To prevent this, remove the fuses from the converter units
which are to remain unenergized before connecting voltage. When the main breaker/con-
tactor of the supply unit is closed (DC busbars are live), never remove or insert the DC
fuses of a converter unit.
If the drive is equipped with a main switch/disconnector: Close the main disconnecting 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] or the main contactor [Q2] of the drive supply unit yet! You
must not power up the drive DC bus yet.
Setting the parameters
Set the DC/DC converter parameters. See chapter Start-up in the DC/DC converter control program
firmware manual (3AXD50000024671 [English]).
If you need information on the use of the control panel, see ACX-AP-x assistant control panels user's
manual (3AUA0000085685 [English]). See also Drive composer start-up and maintenance PC tool
user's manual (3AUA0000094606 [English]).
Charging the DC/DC converter and connecting voltage to the converter
WARNING!
Make sure that the energy storage disconnecting device is still open. Always keep the energy
storage disconnected from DC/DC converter until the DC/DC converter is charged.
Power up and charge the DC/DC converter:
DC/DC converter with the DC switch/disconnector [Q11]:
1. Start the supply unit and close the main contactor [Q2] or the main circuit breaker [Q1] of the drive
supply unit.
2. Close the DC/DC converter charging switch [Q10].
3. Close the DC switch/disconnector [Q11].
4. Open the DC/DC converter charging switch [Q10].
Note:
The charging switch must be open before you can start the DC/DC converter.
DC/DC converter without DC switch/disconnector:
1. Start the supply unit and close the main contactor [Q2] or the main breaker [Q1] of the drive supply
unit. The DC/DC converter is energized and gets charged.
Start-up 77
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