A.1.2 Feeder Assembly, Type Of Coordination 1 With Fuses - Siemens SIRIUS 3RW55 Manual

Example circuits
A.1 Main circuit connection
A.1.2 Feeder assembly, type of coordination 1 with fuses
If a main or line contactor is used, it should not be connected between the soft starter and
the motor. The soft starter could otherwise indicate a "Missing load voltage" fault in case of a
start command and delayed connection of the contactor.
Feeder assembly, type of coordination 1 with fuses
If galvanic isolation is required, install a main or line contactor between the soft starter and
the fuses.
F1
Q21
Q11
M1
PE
202
gG full-range fuse for cable and line protection (e.g. 3NA3)
Main or line contactor for galvanic isolation
Soft starter
Motor
Protective conductor
SIRIUS 3RW55 soft starter
Manual, 08/2018, A5E35630887002A/RS-AB/002