Siemens SIRIUS 3RW55 Equipment Manual page 296

Example circuits
A.1 Main circuit connection
Requirements
• 3RW55 or 3RW55 Failsafe soft starter
For the 3RW55 Failsafe soft starter, note that a Q21 line contactor must be switched on
before the start command so that the 3RW55 Failsafe soft starter can run the device test
before switch-on.
• Motor with windings that can be connected in a delta with line voltage predominating.
• The motor connection type (Page 95) is parameterized as "Automatic detection" or "Inside-
delta".
296
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006