Fundamental Principles and System Description
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
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1.14.2.3 Partial load efficiency of S120 Smart Line Modules
The chart below shows the partial-load efficiency of air-cooled SINAMICS S120 Smart Line Modules.The calculations
are based on a typical efficiency at full load of 98.5 %. The efficiency is represented as a function of the active output
power ratio P
Out
/P
Out-100
supplied to the connected SINAMICS S120 Motor Modules by the SLM or drawn from the
connected SINAMICS S120 Motor Modules by the SLM and regenerated to the mains supply.
SLM efficiency in %
Efficiency of air-cooled S120 Smart Line Modules as a
function of the active output power ratio P
Out
/P
Out-100
in %
1.14.2.4 Partial load efficiency of S120 Active Line Modules + Active Interface Modules
The chart below shows the partial-load efficiency of air-cooled and liquid-cooled SINAMICS S120 Active Line
Modules including the assigned air-cooled Active Interface Modules. The calculations are based on typical efficiency
values at full load. These are 98.5 % with Active Line Modules and 99 % with the assigned Active Interface Modules,
corresponding to a total efficiency η
100-(ALM+AIM)
= 97.5 %. The efficiency is represented as a function of the active
output power ratio P
Out
/P
Out-100
supplied to the connected SINAMICS S120 Motor Modules by the ALM+AIM or drawn
from the connected SINAMICS S120 Motor Modules by the ALM+AIM and regenerated to the mains supply.
ALM+AIM efficiency in %
Efficiency of air-cooled and liquid-cooled S120 Active Line Modules including the assigned
air-cooled Active Interface Modules as a function of the active output power ratio P
Out
/P
Out-100
in %
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