Feeder Protection Of Individual Inverters - Siemens SINAMICS G120D Series Operating Instructions Manual

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
Feeder protection according to IEC
Table 4- 1
Rated power
0.75 kW
1.5 kW
3 kW
4 kW
5.5 kW
7.5 kW
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
Protection device
Fuses of any manufacturer with faster tripping characteristic than class RK5, e.g.
class J, time, CC, G, or CF
SIEMENS circuit breaker
Intrinsically safe SIEMENS circuit breaker
Converter with control units CU240D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34262100B AB
Power supply to inverters through separate 400-V feeders
Feeder protection according to IEC
Power Module
6SL3525-0PE17-5AA1
6SL3525-0PE21-5AA1
6SL3525-0PE23-0AA1
6SL3525-0PE24-0AA1
6SL3525-0PE25-5AA1
6SL3525-0PE27-5AA1
Overview of the approved protection devices according to UL standards
Frame Article No.
size
Fuse Circuit-breaker
FSA 3NA3803 3RV2011-1JA10
FSB 3NA3805 3RV2011-4AA10
FSC 3NA3807 3RV2021-4BA10
3NA3812 3RV2021-4PA10
Installation
4.2 Electrical Installation
Max. rated
current of the
protection de-
vice
10 A
16 A
20 A
32 A
UL category
JDDZ
DIVQ
NKJH
35