Overcurrent operaon
The inverters can be driven at higher amperages beyond the rated current if the duraon of
this overcurrent operaon is me limited.
Two ulisaon cycles of 15 s and 180 s are dened. Within these ulisaon cycles, an overcur-
rent is possible for a certain me if aerwards an accordingly long recovery phase takes place.
Cycle 15 s
During this operaon, the inverter may be loaded for 3 s with up to 200 % of the rated current
if aerwards a recovery me of 12 s with max. 75 % of the rated current is observed. A cycle
corresponds to 15 s.
Cycle 180 s
During this operaon, the inverter may be loaded for 60 s with up to 150 % of the rated cur-
rent if aerwards a recovery me of 120 s with max. 75 % of the rated current is observed. A
cycle corresponds to 180 s.
The monitoring of the device ulisaon (Ixt) causes the set error response if one of the two
ulisaon values exceeds the threshold of 100 %.
The maximum output currents correspond to the switching frequencies and the
overload behaviour of the inverters are given in the rated data.
In case of rotang frequencies < 10 Hz, the me-related overload behaviour
may be reduced.
The graphics shows a cycle. The basic condions given in the table (graphics eld highlighted
in grey) have to be complied with in order that the inverter will not be overloaded. Both cycles
can be combined with each other.
Max. output current Max. overload me Max. output current during
the recovery me
Min. recovery me
A T
1
B T
2
% s % s
Cycle 15 s 200 3 75 12
Cycle 180 s 150 60 75 120
Informaon on project planning
Project planning process
Overcurrent operaon
31
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