ABB ACS5000 User Manual page 157

ABB
De-energizing the drive
5k A UM
4 To disconnect the drive from the main power supply, press the MAIN
SUPPLY OFF pushbutton. The following takes place:
■ The MCB opens.
■ The DC link discharges.
While the DC link discharges, the display shows the following.
1 L ->
StateINU
MOTOR SP
POWER
■ The SUPPLY OFF pushbutton flashes and changes to a perma-
nent light when the DC link is discharged.
When the DC link is discharged, the display shows ReadyOn.
1 L ->
StateINU
MOTOR SP
POWER
5 Rack-out, lock-out, ground and tag-out the main power feeder.
6 Wait until the yellow lamp GROUNDING SWITCH UNLOCKED lights
up.
CAUTION
If the lamp does not light up, do not force the grounding switches in
any direction before you know the reason why the lamp does not
light up. If you try, the following can happen:
■ The switch closes when the DC link is still energized and short-
circuits the DC-link capacitors. The short-circuit manifests itself
in a loud bang.
■ The switch is damaged because it is not released for closing.
3BHS221906 ZAB E01 Rev. D
Chapter 10 - Preventive and corrective maintenance
600.0 rpm
OffSeqO
n
0.00 rpm
0.0 kW
600.0 rpm
ReadyOn
0.00 rpm
0.0 kW
OffSeqOn
Discharging
AuxiliaryOn
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