Siemens SINAMICS S120 Manual page 149

Precharging resistors
The precharging resistors are used to limit the current while precharging.
Table 5- 12 Technical data of the precharging resistors
Category
Rated voltage
Frequency
Resistance value
Pulse energy
1)
Precharging current
2)
- one resistor per phase
- two resistors per phase in parallel
Ambient temperature
Article number
The pulse energy may only occur every 3 minutes
1)
Line current present at the start of the precharging (initial rms value)
2)
As the precharging resistors can get hot, sufficient cooling and clearance to adjacent
components must be ensured in operation.
Figure 5-12
Fuses
The pre-charging input circuit components are protected against overload using fuses.
In a version with one precharging resistor for each phase, fuses of the 3NE1 817-0 (50 A)
type are recommended.
For a version with two precharging resistors connected in parallel for each phase, 3NE1 021-0
fuses (100 A) are recommended.
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3
Unit
V
Hz
Ω
Ws
A
A
° C
Dimension drawing, precharging resistor
3 AC 380 ... 480 V
690 VAC
47 ... 63
2.2 ±10%
18000
91
182
60
6SL3000-0KE12-2AA0
Line Modules
5.2 Basic Line Modules
3 AC 500 ... 690 V
690 VAC
47 ... 63
4.0 ±10%
18000
86
172
60
6SL3000-0KH14-0AA0
147