Siemens SINAMICS G120 Operating Instructions Manual page 319

Low voltage inverters built-in units with cu250s-2 control units and encoder evaluation

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Braking with energy recovery into the line supply

The inverter feeds electrical energy back into the line supply (en‐

ergy recovery).

Advantages: Constant braking torque; the braking energy is

not completely converted into heat, but regenerated into the

line supply; is suitable for all applications; continuous

regenerative operation is possible - e.g. when lowering a

suspended load

Disadvantage: Does not function for a power failure

Which Power Module permits which braking method?

Electrical braking methods

DC braking, compound braking

Dynamic braking

Braking with energy recovery into the line supply

Converter with the CU250S-2 Control Units

Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG

Advanced commissioning

6.22 Electrically braking the motor

Power Modules that can be used

PM240-2, PM240P-2