Siemens SINAMICS G220 - Page 832

17.14.3 Current carrying capacity of the braking resistor
Description
The following overview shows examples for the load rating of the braking resistor as a function
of the braking power.




T
T
T
T
1
1
1
U
U
U
T
T
1
NBY
1
NBY
1
NBY
1
NBY
1
U
P
max
Maximum braking power
240 s Cycle time=running time+cooling time
Examples
① Rated braking power
② Maximum braking power = 20 times the rated braking power
Running time=cycle time/20 12s
Cooling time 228s
③ Braking power=8 times the rated braking power
 Running time=cycle time/8 30s
 Cooling time 210s
④ Braking power=4 times the rated braking power
Running time=cycle time/4 60s
Cooling time 180s
Figure17-9 Load rating of the braking resistor with di󹪜erent braking powers
Technical data
17.14Braking resistor
SINAMICS G220 converter
830 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB