Overcurrent Operation - Lenze 8400 Hardware Manual

4.4

Overcurrent operation

The controllers can be driven at higher amperages beyond the rated current if the duration
of this overcurrent operation is time limited. Two utilisation cycles with a duration of 15
s and 180 s are defined. Within these utilisation cycles, an overcurrent is possible for a
certain time if afterwards an accordingly long recovery phase takes place. For both
utilisation cycles, a moving average is determined separately.
Monitoring of the device utilisation (I x t) activates the set error response (trip or warning
if one of the two utilisation values exceeds the limit of 100 %. The current device utilisation
(I x t) is displayed under parameter C00064/x:
C00064/1: Total value of the device utilisation
ƒ
C00064/2: Pulse utilisation in 15-s cycle
ƒ
C00064/3: Permanent utilisation in 180-s cycle
ƒ
Type of utilisation
Pulse utilisation
Permanent utilisation
EDS84ASC552 EN 10.0
Condition
Utilisation cycle
15 s I > 160 %
aNx
180 s The monitoring function is
permanently active.

Technical data
Overcurrent operation
Monitoring function
Code
Display in C00064/2

Display of the maximum

value in C00064/1
Display in C00064/3

Display of the maximum

value in C00064/1
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