Lenze EVF9333−xV - Manual (Page 342)

Configuration
Monitoring
Controller current load (I x t monitoring)
8
8.3
8.3.5
l
8.3−4 EDSVF9333V EN 6.2−04/2012
If a current−carrying motor phase fails, a motor winding is broken or the
current limit value set in C0599 is too high, the LP1 fault is triggered.
The monitoring is not appropriate for field frequencies > 480 Hz and when
synchronous servo motors are used. Deactivate the monitoring at these
conditions.
The response to exceeding the thresholds can be set under C0597.
)
Note!
The monitoring can only be activated if the function block MLP1
is entered in the processing table (C0465).
8.3.5 Controller current load (I x t monitoring)
200 %
I r
150 %
100 %
70 %
10 60 120 180 t [s]
9300std228
Fig. 8.3−1 I × t diagram
I
r
Device output current
100 % continuous thermal current at C0022
£ 1.5 I
r
70 % continuous thermal current at C0022 > 1.5 I
r
The I × t monitoring monitors the current load of the controller. The current
load is calculated from the mean value of the motor current over the
acquisition period of 180 s.
The monitoring is set in such a way that the following operation modes are
possible:
ƒ Continuously with device output current = I
r
.
ƒ
£ 60 s with device output current £ 1.5 x I
r
.
A fault initiates TRIP OC5. Other responses cannot be set.
Failure of a motor phase (LP1)