Siemens SINAMICS G120 - Braking with Regenerative Feedback to the Line

Setting functions
8.7 Application-specific functions
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
283
8.7.3.5
Braking with regenerative feedback to the line
Typical applications for braking with energy recovery (regenerative feedback into the line
supply):
● Centrifuges
● Unwinders
● Cranes and hoisting gear
For these applications, the motor must brake frequently or for longer periods of time.
Pre-requisite for regenerative braking is the Power Module PM250 or PM260.
The inverter can feed back up to 100% of its power into the line supply (referred to "High
Overload" base load, see Section Technical data, Power Modules (Page 375)).
Setting the braking with regenerative feedback to the line
Parameter
Description
Limiting the regenerative feedback for U/f control (p1300 < 20)
p0640
Motor overload factor
Limiting the regenerative power is not directly possible with U/f control, but can be
achieved indirectly by limiting the motor current.
If the current exceeds this value for longer than 10 s, the inverter shuts down the motor
with fault F07806.
Limiting feedback with vector control (p1300 ≥ 20)
p1531
Regenerative power limit
The maximum regenerative load is entered as negative value via p1531.
(-0.01 … -100000.00 kW).
Values higher than the rated value of the power unit (r0206) are not possible.