ABB ACS880-207, Hardware Manual

Page: 72 / 148

1. Close the cabinet doors, if not yet closed.
2. Make sure that it is safe to connect voltage. Ensure that:
• nobody is working on the unit or circuits that are wired from outside into the cabinets,
• covers of the motor terminal boxes are on.
3. Close the disconnector of the supply transformer (if open) to connect the voltage to the
drive input power terminals.
4. Switch on the external auxiliary supply voltage (supply unit G307), and any other
voltages connected to the drive from outside.
5. Switch on the auxiliary voltage by turning the auxiliary voltage switch [Q21] to the on
position.
6. Supply unit with the grounding switch ([Q9], F259): Switch the grounding switch
off.
7. Switch the charging circuit switch fuse [Q3] on.
8. Depending on the main disconnecting device type: Close the main switch-disconnector
([Q1], F253), or rack in the main breaker ([Q1], F255).
Powering-up the supply unit / drive
This section describes how to re-power-up the supply unit after a service, etc. break. If you
do the very first power-up of the supply unit, obey the instructions in section
Start-up
procedure (page 68) instead.
1. Perform the tasks listed in section Connecting the drive / supply unit to the power
line (page 71) .
2. Turn the operating switch [S21] to the on (1) position to activate the Run enable signal
of the supply unit. The supply unit starts and the control program steps through the
power-up sequence: 1. charging contactor [Q4] switch on, 2. charging (until the DC link
voltage rises high enough), 3. main contactor [Q2] / breaker [Q1] switch on, 4. start of
the supply module rectifying, 5. charging contactor [Q4] switch off.
WARNING!
Never use the green (I) push button of the main breaker ([Q1], F255)
for closing. If the button is not disabled, it closes the main breaker immediately
without the drive DC link charging sequence. This causes overcurrent which
blows the main circuit fuses.
3. Start the motors connected to the drive.
72 Start-up