Siemens SIRIUS 3RW55 Equipment Manual page 314

Soft starters and solid-state switching devices

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Example circuits

A.3 Special applications

Wiring for 3RW55 soft starter in standard (inline) circuit and stopping function DC braking with

2 braking contactors

Auxiliary relay K4, e.g.:

LZS: RT4A4T30 (AC 230 V rated control supply voltage),

LZS: RT4A4S15 (AC 115 V rated control supply voltage)

Motor starter protector

SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters

Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006

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Sirius 3rw55 failsafe