Siemens SIRIUS 3RT Manual page 407

9.28 Assembly kit for contactor assemblies for star-delta (wye-delta) start (sizes S00 to S3)
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SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
Attach the wiring module for connecting the main current paths to contactors Q11 and Q13
from above (a).
You can optionally use the 3-phase infeed terminal (b).
Attach the neutral bridge (c) to contactor Q12 from above.
Attach the wiring module for connecting the main current paths to contactors Q13 and Q12
from below (d).
Screw the wiring modules tight with a screwdriver.
Accessories
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