Siemens 3RW51 Series Manual page 166

Example circuits
A.2 Control circuit connection
Wiring of control circuit for controlling a line contactor
F1 Fuse
S1 Switch
S2 Pushbutton: Reset > 4 s
Q1 Motor starter protector
Q11 3RW51 soft starter
Q21 External bypass contactor
Q22 Line contactor
M1 Motor
P1 Indicator light
PE Protective conductor
166
Manual, 06/2019, A5E37108631002A/RS-AB/002
3RW51 Soft Starter