8-16 (18) 2UEA001270 Rev. F ACS2000 User manual
Chapter 8 - Local operation
8.8 Emergency-off
8.8.1 Function
The drive is equipped with a hardwired emergency-off circuit. If 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 operator control
panel (see Figure 8-1).
Pressing the emergency OFF pushbutton does not disconnect or switch
off the auxiliary power supply from the drive.
8.8.2 Initiating an emergency shutdown
An emergency shutdown is initiated by pressing the emergency OFF
pushbutton on the control compartment door or an external emergency
OFF pushbutton (if present) linked to the emergency-off circuit.
When an emergency shutdown is initiated during drive operation:
• The MV switchgear opens.
• The drive system coasts down.
• The DC link of the drive discharges.
• The status line of the CDP control panel alternates between the
messages EmergeOff, NotReadyOn.
1 L ->
600.0 rpm
StateINU
EmergeOff
MOTOR SP 0.00 rpm
POWER
0.0 kW
EmergeOff
NotReadyOn
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