Technical specifications
12.2 General technical specifications
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
481
12.2.2
Overload capability
The converter is equipped with an overload reserve to deal with breakaway torques, for
example.
In drives with overload requirements, the appropriate base load current must, therefore, be
used as a basis for the required load.
The criterion for overload is that the drive is operated with its base load current before and
after the overload occurs (a load duration of 300 s is used as a basis here).
Low overload
The base load current for low overload (I
L
) is based on a load duty cycle of 110% for 60 s or
150% for 10 s.
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,
,
V
W
V
V
/
/
/
Figure 12-2 Low overload
High overload
The base load current for a high overload I
H
is based on a duty cycle of 150% for 60 s or
160% for 10 s.
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+
+
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V
W
V
V
Figure 12-3 High overload