ABB ACS2000 AFE 1MVA, User Manual

Page: 164 / 177

CHAPTER 10 – PREVENTIVE AND CORRECTIVE MAINTENANCE 164
10.6.3 De-energizing the drive locally
The following section describes how to de-ener-
gize the drive using the local operator panel of the
drive. If the drive is controlled from remote, follow
the established shutdown procedures.
Stopping the motor
1. Check that the CDP control panel is connected
to the INU.
2. Enable the local control mode of the CDP con-
trol panel.
For further information, see 9.9 Local and
remote control .
3. Stop the motor..
When the motor has reached zero speed, the display shows
ReadyRun
.
De-energizing the drive
4. To disconnect the drive from the main power
supply, press the SUPPLY OFF pushbutton. The
following takes place:
- The MCB opens.
- The DC link discharges.
While the DC link discharges, the display
shows
OffSeqOn .
When the DC link has discharged completely,
the status line displays
ReadyOn and the SUP-
PLY OFF pushbutton changes to a permanent
light.
5. Rack-out, lock-out, ground and tag-out the
main power feeder.
6. Wait until the yellow lamp GROUNDING SWITCH
UNLOCKED lights up.
The lamp lights up when cooling of the drive
has stopped. Cooling is stopped after a delay
time (default setting: 10 min.) has elapsed. The
delay time is triggered, when the main power
feeder is disconnected.
If the lamp is on, continue with Grounding .
If the yellow lamp is not on, continue with 10.6.4
Grounding switch is not released .
Grounding
7. If the yellow lamp GROUNDING SWITCH
UNLOCKED is on, turn the grounding switch to
the grounded position.
When the grounding switch is in the grounded
position, the CDP control panel shows the fol-
lowing:
8. If necessary, open the doors of medium voltage
compartments.
—
To open the AFE-INU compart-
ment door, auxiliary voltage is
required.
9. Switch off and lockout all auxiliary voltages
from external sources.
10. Verify that the drive system is de-energized.
11. To connect a grounding set, continue with
10.6.5 Connecting a grounding set .
1 L -> 600.0 rpm 0
StateINU
ReadyRun
MOTOR SP 0.00 rpm
POWER 0.0 kW
1 L -> 600.0 rpm
StateINU OffSeqOn
MOTOR SP 0.00 rpm
POWER
0.0 kW
1 L ->
600.0 rpm
StateINU
ReadyOn
MOTOR SP 0.00 rpm
POWER
0.0 kW
CAUTION
!
If the GROUNDING SWITCH UNLOCKED pushbutton
does not light up, press it: this pushbutton also
works as a test lamp to verify its functionality.
It is important that you do not force the grounding
switch 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.
1 L -> 600.0 rpm
StateINU DCGnd NOpen
MOTOR SP 0.00 rpm
POWER
0.0 kW
DCGnd Nopen
NotReadyOn
AFE NotRdy