Siemens SINAMICS S120 Manual page 123

Precharging resistors
The precharging resistors are used to limit the current while precharging.
Table 4- 37
Category
Rated voltage
Frequency
Resistance value
Pulse energy
Precharging current
- one resistor per phase
- two resistors per phase in parallel
- three resistors per phase in parallel
Ambient temperature
Article number
The pulse energy may only occur every 3 minutes
1)
Line current available at the start of the precharging (initial rms value) at 400 V
2)
As the precharging resistors can get hot, sufficient cooling and clearance to adjacent
components must be ensured in operation.
Figure 4-38
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3
Technical data of the precharging resistors
1)
2)
Dimension drawing, precharging resistor
Line-side power components
4.7 Active Interface Modules Chassis-2
Unit 3 AC 380 ... 480 V
V 690 VAC
Hz 47 ... 63
Ω 2.2 ±10%
Ws 18000
A
A
A
° C
6SL3000-0KE12-2AA0
91
182
274
60
121