
Parameter
Name / value range / [default setting]
Info
0x6078
(PAR 103)
Current actual value
(Motor current %)
•
Read only: x.x %
Display of the present motor current.
•
100 % ≡ rated motor current
0x6075 (PAR 323)
7.7.3
Ultimate motor current
The parameterisable ultimate motor current I
ULT
serves to protect the motor.
NOTICE!
With an incorrect parameterisation, the ultimate motor current may be exceeded in the proc-
ess.
Possible consequence: irreversible damage of the motor.
▶
Be absolutely sure to adapt the setting of the ultimate motor current to the motor connec-
ted.
▶
Set the maximum output current of the inverter in
0x6073 (PAR 324)
to a considerably
lower value than that of the ultimate motor current.
Parameter
Name / value range / [default setting]
Info
0x2D46:001
(PAR 353/001)
Monitoring of ultimate motor current: Threshold
(Ult mot. current monit.: Mot. current threshold)
0.0 ... [6.8]* ... 500.0 A
•
Default setting depending on the size.
Warning/error threshold for motor current monitoring.
•
If the instantaneous value of the motor current exceeds the threshold
set, the response set in
0x2D46:002 (PAR 353/002)
is effected for the
purpose of motor protection.
0x2D46:002
(PAR 353/002)
Monitoring of ultimate motor current: Response
(Ult mot. current monit.: Mot. current resp.)
•
For possible settings see description for
0x2D45:001 (PAR 310/001)
.
^
94
Selection of the response to the triggering of motor current monitoring.
3 Error
7.7.4
Motor phase failure detection
The motor phase failure detection function can be activated for both synchronous and asyn-
chronous motors.
Preconditions
Phase failure detection during operation is basically only suitable for applications which are
operated with a constant load and speed. In all other cases, transient processes or unfavoura-
ble operating points can cause maloperation.
Details
If a current-carrying motor phase (U, V, W) fails during operation, the response selected in
0x2D45:001 (PAR 310/001)
is tripped if the following two conditions are met:
•
Condition 1: detection is activated. See
0x2D45:002 (PAR 310/002)
•
Condition 2: a specific commutation angle (approx. 150° electrically) has been covered with-
out the detection of a current flow.
Parameter
Name / value range / [default setting]
Info
0x2D45:001
(PAR 310/001)
Motor phase failure detection: Response
(Motor Ø failure: Ø error response)
Selection of the response following the detection of a motor phase fail-
ure.
0 No response
1 Warning
2 Trouble
3 Error
Motor control
Motor protection
Ultimate motor current
94
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