09 OPERATION
3BHS213401 E01 REV H ACS1000 AIR-COOLED USER MANUAL 125/184
9.9 Emergency-off
The drive is equipped with a hard-wired emergency-off circuit. When an emergency situation
occurs during operation, this safety feature ensures that the drive can be disconnected
without delay from the main power supply. If 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 (Fig. 9-1)
and features a latching switch action.
CAUTION
⚠
9.9.1 Initiating an emergency-off
To initiate an emergency-off, press 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-off is initiated during drive operation, the following takes place:
- The MCB opens.
- The drive coasts down.
- The status line of the CDP control panel displays the message Emerg Off.
- The DC link of the drive discharges.
Pressing the EMERGENCY-OFF pushbutton does not disconnect the auxiliary
power supply from the drive.
1 L -> 600.0 rpm
ACS 1000
*** FAULT ***
Emerg Off
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