Siemens SINAMICS S120 System Manual page 132

Braking resistors
8.4 Technical data
Duty cycles for braking resistors with a thermostatic switch
P [kW]
P
4 x P
Figure 8-7
T [s]: Period duration of braking duty cycle
A [s]: Load duration
P [W]: Rated power (continuous power rating) of the braking resistor
N
P
max
4 x P
Table 8-5 Duty cycles
6SE7018-0ES87-2DC0
Duty cycle P
max
A [s] 3
T [s] 90
The following applies when connecting Braking Modules in parallel:
P
N total
4 x P
P
max total
130
max
N
A (4xP
N)
P
N
A (P )
max
3 20 23
Duty cycles for braking resistors with a thermostatic switch
[W]: Peak power of braking resistor (6 x P
[W] = power permitted every 90 s for 20 s
N
6SE7021-6ES87-2DC0
Duty cycle 4 x P Duty cycle P
N
20 3
90 90
= 0.9 x total P of single devices
N
= 0.9 x sum (4 x P
N total N
= total P of single devices
max
T
)
N
Duty cycle 4 x P
max
20
90
) of single devices
A (4xP
N)
A (P )
max
90
6SE7023-2ES87-2DC0
Duty cycle P Duty cycle 4 x P
N max
3 20
90 90
High Frequency Drive
System Manual, 10/2020, 6SL3097-5AH10-0BP0
t (s)
N0