ABB ACS2000 AFE 2MVA User Manual page 135

135 ACS2000 AFE 2MVA UM 3BHS355653 ZAB E01 REV. H
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8.8 Emergency-off
The procedure to perform an emergency shut-down is described
below.
8.8.1 Function
The drive is equipped with a hard-wired emer-
gency-off circuit. When an emergency situation
occurs during operation, this safety feature
ensures that the drive can be disconnected with-
out delay from the main power supply. When the
EMERGENCY OFF pushbutton has been pressed
while the drive is at standstill, the main power sup-
ply cannot be connected to the drive, hence the
drive cannot be started up.
The EMERGENCY OFF pushbutton of the drive is
part of the operator control panel and features a
latching switch action.
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Pressing the EMERGENCY OFF
pushbutton does not disconnect
the auxiliary power supply from
the drive.
8.8.2 Initiating an emergency-off
An emergency-off is initiated by pressing the
EMERGENCY OFF pushbutton on the control com-
partment door or an external EMERGENCY OFF
pushbutton (if present) linked to the emergency-
off circuit.
When an emergency-off is initiated during drive
operation, the following takes place:
• The MCB opens.
• The drive coasts down.
• The DC link of the drive discharges.
• The status line of the CDP control panel alter-
nates between the message EmergencyOff,
NotReadyOn.
1 L ->
StateINU
MOTOR SP
POWER
• The EMERGENCY RESET pushbutton flashes.
• The SUPPLY OFF pushbutton flashes.
600.0 rpm
EmergencyOff
EmergeOff
NotReadyOn
0.00 rpm
0.0 kW
8.8.3 Starting the drive after an emergency-off
1. To start the drive after an emergency-off refer-
ence value, unlatch the EMERGENCY OFF push-
button.
2. Turn the EMERGENCY OFF pushbutton into the
direction indicated by the arrows on the push-
button to return the pushbutton to its initial
position.
3. Press the RESET key on the CDP control panel to
cancel the emergency-off message on the dis-
play.
4. To reset the emergency-off safety relay of the
drive, press the EMERGENCY RESET pushbut-
ton.
After resetting, the status message of the drive
changes to ReadyOn.
1 L -> 0.0 rpm
StateINU ReadyOn
MOTOR SP 0.00 rpm
POWER
0.0 kW
The main power supply can be connected to the
drive again and the drive can be started up.