Emotron VS10 - Motor Phase Failure Detection

180 01-6203-01R3, CG Drives & Automation
7.7.4. Motor phase failure detection
The motor phase failure detection function can be activated for both synchronous and
asynchronous 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
unfavourable operating points can cause maloperation.
Details
If a current-carrying motor phase (U, V, W) fails during operation, the response selected in
0x2D45:001 (P310.01) is tripped if the following two conditions are met:
• Condition 1: detection is activated. See 0x2D45:002 (P310.02)
• Condition 2: a specific commutation angle (approx. 150° electrically) has been covered
without the detection of a current flow.
Parameter
Name / value range / [default setting]
Info
0x2D45:001
(P310.01)
Motor phase failure detection: Response
(Mot.phase.fail.: Response)
Selection of the response following the detection of a motor phase
failure.
Associated error codes:
65289 | 0xFF09 Motor phase missing
65290 | 0xFF0A Motor phase failure phase U
65291 | 0xFF0B Motor phase failure phase V
65292 | 0xFF0C Motor phase failure phase W
0
No response

Error types
 84
1
Warning
2
Trouble
3
Fault
0x2D45:002
(P310.02)
Motor phase failure detection: Current threshold
(Mot.phase.fail.: Current thresh.)
1.0 ... [5.0] ... 25.0 %
Current threshold for the activation of the motor phase failure
detection function.
100 % ≡ Maximum current 0x2DDF:002
Background: in order to be able to reliably detect the failure of a
motor phase, first a certain must flow for the current sensor system.
The detection function is therefore only activated 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 detection: Voltage threshold
(Mot.phase.fail.: Voltage thresh.)
0.0 ... [10.0] ... 100.0 V
Voltage threshold for the monitoring of several motor phases.
The V/f characteristic control enables the detection of several failed
motor phases during operation.
Monitoring with regard to the failure of several motor phases is active
if
a response that is not "0: No response" is set in 0x2D45:001
(P310.01) and if the motor voltage exceeds the voltage threshold set
here.
The monitoring function is triggered if the level of the motor current
is
lower than the device-dependent threshold for longer than 20 ms.
The monitoring function for the failure of several motor phases can be
deactivated if the value "100.0 V" is set here.