Siemens Sinamics S120 Manual page 588

Braking resistors
9.4 Technical data
Duty cycles for braking resistors with a thermostatic switch
Figure 9-9
T [s] time period of braking duty cycle
A [s] load duration
P [W] rated power (continuous power) of braking resistor
N
P
max
4 x P
Table 9- 6 Duty cycles
6SE7018-0ES87-2DC0
Duty cycle Duty cycle 4
P x P
max
A [s] 3 20
T [s] 90 90
The following applies when connecting Braking Modules in parallel:
P
N total
4 x P
P
max total
588
Duty cycles for braking resistors with a thermostatic switch
[W] peak braking power of the braking resistor
[W] = power permitted every 90 s for 20 s
N
6SE7021-6ES87-2DC0
Duty cycle
P
N max
3
90
= 0.9 x total P of single devices
N
= 0.9 x sum (4 x P
N total
= total P of single devices
max
6SE7023-2ES87-2DC0
Duty cycle 4 Duty cycle
x P P
N max
20 3
90 90
) of single devices
N
6SE7028-0ES87-2DC0
Duty cycle 4 Duty cycle
x P P
N0 max
20 3
90 90
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
Duty cycle 4
x P
N
20
90