Lenze i55AE155F User Manual

8.7.5 Motor phase failure detecon
The motor phase failure detecon funcon can be acvated for both synchronous and asyn-
chronous motors.
Precondions
Phase failure detecon during operaon is basically only suitable for applicaons which are
operated with a constant load and speed. In other cases, transient processes or unfavourable
operang points can cause maloperaon.
Details
If a current-carrying motor phase (U, V, W) fails during operaon, the response selected in
0x2D45:001 (P310.01) is tripped. In case of seng "No response [0]", only an entry is made in
the logbook.
A motor phase failure can only be detected if
1.
the rated motor current is higher than 10 % of the rated inverter current and
2.
the output frequency is not lower than 0.1 Hz (standsll).
The lower the output frequency the longer the detecon of the motor phase failure.
Parameter Name / value range / [default seng] Info
0x2D45:001
(P310.01)
Motor phase failure detecon: Response
(Mot.phase.fail.: Response)
Selecon of the response following the detecon of a motor phase fail-
ure.
Associated error codes:
•
65289 | 0xFF09 - Motor phase missing
•
65290 | 0xFF0A - Phase U motor phase failure
•
65291 | 0xFF0B - Motor phase failure phase V
•
65292 | 0xFF0C - Motor phase failure phase W
0 No response
4Error types ^ 139
1 Warning
2 Trouble
3 Fault
0x2D45:002
(P310.02)
Motor phase failure detecon: Current threshold
(Mot.phase.fail.: Current thresh.)
1.0 ... [5.0] ... 25.0 %
Current threshold for the acvaon of the motor phase failure detecon
funcon.
•
100 % ≡ Maximum current 0x2DDF:002
•
Background: in order to be able to reliably detect the failure of a
motor phase, rst a certain must ow for the current sensor system.
The detecon funcon is therefore only acvated if the actual value
of the motor current has exceeded the current threshold set here.
•
Display of the present motor current in 0x2D88 (P104.00).
0x2D45:003
(P310.03)
Motor phase failure detecon: Voltage threshold
(Mot.phase.fail.: Voltage thresh.)
0.0 ... [10.0] ... 100.0 V
Voltage threshold for motor phase monitoring.
•
The monitoring funcon is triggered if the level of the motor current
is lower than the device-dependent threshold for longer than 20 ms.
•
In case of V/f characterisc control, the voltage threshold is consid-
ered addionally for the motor phase failure detecon. If the motor
voltage is higher than the voltage threshold, monitoring is combined
with the motor current.
Motor control
Motor protecon
Motor phase failure detecon
223

Lenze i55AE155F Specifications

General

Brand	Lenze
Model	i55AE155F
Category	Inverter
Language	English