Siemens SINAMICS G120D - Feeder Protection of Individual Inverters

Installation
4.2 Electrical Installation
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
35
4.2.4
Feeder protection of individual inverters
If you install a separate 400-V feeder for each inverter, you must protect each feeder
individually.
Figure 4-5 Power supply to inverters through separate 400-V feeders
Feeder protection according to IEC
Table 4- 1 Feeder protection according to IEC
Rated power
Power Module
Frame
size
Article No.
Max. rated
current of the
protection de-
vice
Fuse
Circuit-breaker
0.75 kW
6SL3525-0PE17-5AA1
FSA 3NA3803 3RV2011-1JA10 10 A
1.5 kW
6SL3525-0PE21-5AA1
3 kW
6SL3525-0PE23-0AA1
FSB
3NA3805
3RV2011-4AA10
16 A
4 kW
6SL3525-0PE24-0AA1
FSC 3NA3807 3RV2021-4BA10 20 A
5.5 kW
6SL3525-0PE25-5AA1
7.5 kW
6SL3525-0PE27-5AA1
3NA3812
3RV2021-4PA10
32 A
Feeder protection according to UL standards
Use in North America requires protection devices that meet UL standards as detailed in the
following tables.
Table 4- 2 Overview of the approved protection devices according to UL standards
Protection device
UL category
Fuses of any manufacturer with faster tripping characteristic than class RK5, e.g.
class J, time, CC, G, or CF
JDDZ
SIEMENS circuit breaker
DIVQ
Intrinsically safe SIEMENS circuit breaker
NKJH