146 Program features
.
Settings
Parameters 3005…3009
Note: It is also possible to use the motor temperature measurement function. See
section Motor temperature measurement through the standard I/O on page 155.
Underload protection
Loss of motor load may indicate a process malfunction. The drive provides an
underload function to protect the machinery and process in such a serious fault
condition. Supervision limits - underload curve and underload time - can be specified
as well as the action taken by the drive upon the underload condition (alarm
indication / fault indication & drive stop / no reaction).
Settings
Parameters 3013…3015
Earth fault protection
The Earth fault protection detects earth faults in the motor or motor cable. The
protection can be selected to be active during start and run or during start only.
An earth fault in the input power line does not activate the protection.
Settings
Parameter 3017 EARTH FAULT
Incorrect wiring
Defines the operation when incorrect input power cable connection is detected.
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Motor
load
Temp.
rise
100%
63%
Motor thermal time constant
t
100 =
127%
150
50
P 3007
P 3008
f
Output current relative (%) to
motor nominal current
P 3009
100%
Break point
Motor load curve
Zero speed load
t