Water Conditioning & Purification Magazine

Soft starters

Siemens introduces First Soft Starters with integrated safe torque off (STO) functionality. Features include integrated motor protection function that ensures fast, reliable shutdown and a restart interlock feature and failsafe digital input to help ensure user safety. Products are SIL 3- and PL e-compliant as well as ATEX- and IECEx-certified. The SIRIUS 3RW55 Failsafe soft starters are the first to feature the integrated STO function, which ensures that the motor comes to a complete standstill if an operator initiates an emergency shutdown.

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