Siemens SINAMICS G120P, Руководство по эксплуатации

Страница: 475 / 496

Technical specifications
11.2 General data
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
475
11.2.2 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 overloads apply under the precondition that the converter is operated at its base-load
current before and after the overload (a duty cycle duration of 300 s is used as a basis here).
Duty cycles
The base load current for low overload (I
L
) is based on a load duty cycle of 110% for 60 s or
135% for 3 s.
The base load current I
H
for a high overload is based on a duty cycle of 150% for 60 s.
Figure 11-5 Overload curves