Overload Capability - Siemens SINAMICS S120 Equipment Manual

Cabinet Modules
5.6 Motor Modules in chassis format
5.6.6

Overload capability

The Motor Modules in chassis format are equipped with an overload reserve to handle
breakaway torques, for example.
In the case of 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 duty cycle duration of 300 s is used as a basis here).
Small overload
The base load current I
duty cycle period of 300 s.
Figure 5-30
High overload
The base load current I
load cycle period of 300 s.
Figure 5-31
198
is based on a duty cycle of 110 % for 60 s or 150 % for 10 s with a
L
Small overload
is based on a load cycle of 150 % for 60 s or 160 % for 10 s with a
H
High overload
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A