Overcurrent Operation - Lenze 8400 StateLine C 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 load
Pulse load
Permanent load
If the maximum value in code C00064/1 exceeds 100%, a "warning" will be generated or
a "trip" will be triggered (according to setting).
50
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Condition
Load cycle
15 s I > 160 %
aNx
180 s The monitoring function is
permanently activated.
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
EDS84ASC552 EN 6.0