High Overload And Low Overload - Siemens SINAMICS G120C Operating Instructions Manual

10.2

High Overload and Low Overload

Permissible inverter overload
The inverter has two different power data: "Low Overload" (LO) and "High Overload" (HO),
depending on the expected load.
Figure 10-1
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"
Table 10- 1
The "Low Overload" load cycle assumes a uni-
form base load with low requirements placed on
brief accelerating p phases. Typical applications
when designing according to "Low Overload"
include:
•
•
•
•
•
•
SINAMICS G120C converter
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
Duty cycles, "High Overload" and "Low Overload"
Load cycles and typical applications:
"Low Overload" load cycle
Pumps, fans and compressors
Wet or dry blasting technology
Mills, mixers, kneaders, crushers, agitators
Basic spindles
Rotary kilns
Extruders
10.2 High Overload and Low Overload
"High Overload" load cycle
The "High Overload" load cycle permits, for re-
duced base load, dynamic accelerating phases.
Typical applications when designing according to
"High Overload" include:
Horizontal and vertical conveyor technology
•
(conveyor belts, roller conveyors, chain con-
veyors)
Centrifuges
•
Escalators/moving stairways
•
Lifters/Lowerers
•
Elevators
•
Gantry cranes
•
Cable railways
•
Storage and retrieval machines
•
Technical data
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