Lenze E84DGDVB7514 - Overcurrent Operation

Technical data
Overcurrent operation
4

40
EDS84DG752 EN 5.0
4.4 Overcurrent operation
If the device utilisation Ixt exceeds the threshold set (C00064/1, Lenze setting = 100 %),
the monitoring function triggers an error response and sets the controller to the ”Fault”
devicestatus. Toexit thedevice status,the errormust bereset (”acknowledged”)explicitly.
The curves of typical load functions and the simulation of t he ”Ixt” function are shown in
the following illustration:
t
0
100%
1
0
2
I [%]
aN8
T
2
T
3
T
4
T
1


8400IZ180
Fig. 4-1 Overcurrent capacit y at 45° C

Pulse load ( 15 s cycle)
Calculation equation:

Peak current
A ⋅ T
1
+C ⋅ T
2
T
1
+T
2
≦ 100%

Unloading current
T
1
Peak current period
T
2
Unloading current period
 Permanent load (180 s cycle) Calculation equation:
 Peak current
B ⋅ T
3
+C ⋅ T
4
T
3
+T
4
≦ 100%
 Unloading current
T
3
Peak current period
T
4
Unloading current period
I
aNx
Rated value of continuous output
current