Overcurrent Operation - Lenze 8400 protec Hardware Manual

4 Technical data

Overcurrent operation

4.4 Overcurrent operation
The controllers are designed for an overcurrent limited in time. The load due to defined,
cyclic operation is determined by the "Ixt" monitoring function. The "Ixt" function
comprises two moving averaging procedures which are checked in parallel:
temporary moving averaging of the apparent motor current for pulse loads
ƒ
continuous moving averaging of the apparent motor current for permanent loads
ƒ
Type of utilisation
Pulse utilisation
Permanent utilisation
If the maximum value in code C00064/1 exceeds 100%, a "warning" will be generated or
a "trip" will be triggered (according to setting).
56
Condition
Utilisation cycle
15 s I > 160 %
aNx
180 s The monitoring function is
permanently active.
l
Monitoring function
Code
l Display in C00064/2
l
Display of the maximum
value in C00064/1
l
Display in C00064/3
l
Display of the maximum
value in C00064/1
EDS84DPS424 EN 5.0