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70 Start-up
Tasks
Make sure that the inverter units of the drive system have been installed and started up according
to the instructions in their hardware manual.
Make sure that the supply unit is stopped, and the drive system has been isolated from the
supply network.
Powering up the DC bus
Make sure that all cabinet doors are closed.
Close the disconnector of the supply transformer.
Close the drive auxiliary voltage switch (if present) to power up the control units.
Start the supply unit. See the procedure in the supply unit hardware manual. When started, the
supply unit charges the capacitors of all inverters and brake units connected to the DC bus.
Brake units with DC switch/disconnector: Connecting the brake unit to the DC bus
To charge the brake unit capacitors, close the charging switch [Q10.1].
When the green light [P11.1] on the cabinet door illuminates, close the DC switch/disconnector
[Q11.1] of the brake unit.
Open the charging switch [Q10.1].
Note: The brake unit can start only after the charging switch is open.
Setting up the brake unit parameters
Check the brake control program parameter settings. See ACS880 brake control program firm-
ware manual (3AXD50000020967 [English]).
Operational tests
Test the operation of the braking. See ACS880 brake control program firmware manual
(3AXD50000020967 [English]).
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