Installing
3.2 Connecting
SINAMICS G120C, FSD ... FSF inverters
22 Compact Operating Instructions, 11/2016, FW V4.7 SP6, A5E39339884B AA
Branch circuit protection according to the UL standard
Use in North America requires protection devices that meet UL standards as detailed in the
following tables.
Table 3- 4 Permissible safety devices according to the UL standard
Fuses of any manufacturer with faster tripping characteristic than class RK5, e.g.
Type E combination motor controller (designation according to the UL standard), is
available as SIEMENS circuit breaker
NKJH
In accordance with the following tables, you may operate the inverter on a branch circuit with
the specified short-circuit current rating provided the specified branch-circuit protection is
installed.
Table 3- 5 Permissible circuit protection with non-semiconductor fuses of Classes J, T, CC, G or CF
(JDDZ)
Maximum rated current of the fuse
Short circuit current rating of the inverter
Minimum envelope dimensions of a control cabinet approved according to UL in which the inverter