Siemens SINAMICS G120D - Page 39

Installation
4.2 Electrical Installation
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
39
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- 6 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
Table 4- 7 Feeder protection with fuse, UL category JDDZ
Max. rated current of the fuse
Short-circuit current rating SCCR (Short circuit current rating)
30 A 65 kA, 480 V 3AC
Table 4- 8 Feeder protection with circuit breaker, UL categories DIVQ and NKJH
Max. rated current of the
circuit breaker
Article No.
UL cat.
Short-circuit
current rating
SCCR (Short
circuit current
rating)
30 A 3RV2711…, 3RV1742…, LGG…, or
CED6…
DIVQ 65 kA, 480 V
3AC
25 A
3RV2021-4DA…
NKJH 65 kA, 480 V
3AC
3RV.031-4DA10
22 A 3RV2721… DIVQ 50 kA, 480 V
3AC