Siemens SIRIUS 3RT Manual page 157

6.13 Starting three-phase motors with reduced starting current peaks (contactor assembly for star-delta (wye-
delta) start)
Main circuit
The diagram below shows the preferred main circuit wiring for a star-delta circuit, clockwise
and counterclockwise rotation.
Figure 6-10
Control circuit
The diagram below shows the control circuit for the main circuit depicted above.
Figure 6-11
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
Main circuit of the contactor assembly for star-delta (wye-delta) start
Control circuit of the contactor assembly for star-delta (wye-delta) start
Configuration
157