ABB ACS2000 User Manual page 84

84 A C S 2 0 0 0 , 4 K V U S E R M A N U A L
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99
Connecting a
grounding set
1 Line supply cables
2 PE ground bus
3 4-way grounding set
5. Switch off all auxiliary voltages from external
sources.
The drive is safely grounded, and safe access is
possible.
Emergency-off
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.
DANGER
The emergency OFF pushbutton of the drive is part
of the operator control panel (see Figure 96).
WARNING
CAUTION: Pressing the emergency OFF pushbutton
CAUTION
does not disconnect or switch off the auxiliary
power supply from the drive.
NOTICE
2
3
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
1
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
[600.0 rpm] 0
EmergeOff
Procedure for starting the drive system after an
emergency shutdown
1. Pull out the emergency OFF pushbutton.
2. Push the CDP panel reset button.
After resetting, the status indication of the drive
changes to ReadyOn.
Now, the main power supply can be connected to
the drive again and the drive system can be
started up.
EmergeOff
NotReadyOn