ABB ACS5000, User Manual

Page: 134 / 186

08 OPERATION
3BHS799208 E01 REV E ACS5000 WATER-COOLED USER MANUAL 134/186
8.9 Emergency-off
The drive is equipped with a hardwired emergency-off circuit. When an
emergency situation occurs during operation, this safety feature ensures
that the drive system can be disconnected without delay from the main
power supply. When the EMERGENCY-OFF pushbutton has been pressed
while the drive is at standstill, the main power supply cannot be connected
to the drive, hence the drive cannot be started up.
The EMERGENCY-OFF pushbutton of the drive is part of the local operator
panel (Fig. 8-1) and features a latching switch action.
8.9.1 Initiating an emergency off
To initiate an emergency stop, press the EMERGENCY-OFF pushbutton on
the door of the control compartment, or, if present, an external
EMERGENCY-OFF pushbutton that is linked to the emergency-off circuit.
When an emergency-off is initiated during operation, the following
takes place:
• Main circuit breaker opens
• Drive coasts down
• DC link of the drive discharges
• Status line indication of the CDP control panel alternates between
EmergencyOff and NotReadyOn.
• EMERGENCY-OFF RESET pushbutton flashes.
• SUPPLY OFF pushbutton flashes.
8.9.2 Starting the drive system after an emergency-off
1.
To start up the drive system after an emergency-off, unlatch the
EMERGENCY-OFF pushbutton.
The EMERGENCY-OFF pushbutton returns to its initial position when
turned into the direction indicated by the arrows on the pushbutton.
2. To reset the emergency-off safety relay of the drive, press
EMERGENCY-OFF RESET button.
⚠
CAUTION
Pressing the EMERGENCY-OFF pushbutton DOES NOT disconnect the
auxiliary power supply from the drive.
1 L -> 600.0 rpm
StateINU EmergeOff
MOTOR SP 0.00 rpm
POWER 0.0 kW
Alternating display message:
• EmergeOff
• NotReadyOn