Braking With Regenerative Feedback To The Line - Siemens SINAMICS G120 Operating Instructions Manual

7.9.2.5

Braking with regenerative feedback to the line

Regenerative braking is typically used in applications where braking energy is generated
either frequently or for longer periods of time, e.g.:
● Centrifuges
● Unwinders
● Cranes and hoisting gear
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 266)).
Parameterization of braking with regenerative feedback to the line
Table 7- 38
Parameter
Limiting the regenerative feedback for V/f control (P1300 < 20)
p0640
Limiting feedback with vector control (P1300 ≥ 20)
P1531
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB
Settings for braking with regenerative feedback to the line
Description
Motor overload factor
Limiting the regenerative power is not directly possible with V/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 message F07806.
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.
7.9 Application-specific functions
Functions
197