Overload Capability Of The Inverter - Siemens SINAMICS G120 Operating Instructions Manual
Low voltage inverters
built-in units with cu250s-2 control units and
encoder evaluation
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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Technical data
10.2 Overload capability of the inverter
10.2
Overload capability of the inverter
Overload capability is the property of the inverter to temporarily supply a current that is higher
than the rated current to accelerate a load. Two typical load cycles are defined to clearly
demonstrate the overload capability: "Low Overload" and "High Overload"
Definitions
Base load
Constant load between the accelerating phases of the drive
Low Overload
● LO base load input current
Permissible input current for a "Low
Overload" load cycle
● LO base load output current
Permissible output current for a "Low
Overload" load cycle
● LO base load power
Rated power based on the LO base load
output current
If not specified otherwise, the power and current data in the technical data always refer to a
load cycle according to Low Overload.
We recommend the "SIZER" engineering software to select the inverter.
You can find additional information about SIZER on the Internet:
10804987/130000)
Load cycles and typical applications:
"Low Overload" load cycle
The "Low Overload" load cycle assumes a
uniform base load with low requirements
placed on brief accelerating p phases. Typi‐
cal applications when designing according to
"Low Overload" include:
● Pumps, fans and compressors
● Wet or dry blasting technology
● Mills, mixers, kneaders, crushers,
agitators
● Basic spindles
● Rotary kilns
● Extruders
444
Download SIZER
(http://support.automation.siemens.com/WW/view/en/
High Overload
● HO base load input current
Permissible input current for a "High
Overload" load cycle
● HO base load output current
Permissible output current for a "High
Overload" load cycle
● HO base load power
Rated power based on the HO base load
output current
"High Overload" load cycle
The "High Overload" load cycle permits, for
reduced base load, dynamic accelerating
phases. Typical applications when designing
according to "High Overload" include:
● Horizontal and vertical conveyor
technology (conveyor belts, roller
conveyors, chain conveyors)
● Centrifuges
● Escalators/moving stairways
● Lifters/Lowerers
● Elevators
● Gantry cranes
● Cable railways
● Storage and retrieval machines
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
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