Description
The Siemens Industrial Controls 3RV2021-4CA10 Motor Starter 17–22A is a manual drive protection component used to control and safeguard three-phase motors. It combines overload protection, short-circuit interruption, and a manual disconnect operates in a single IEC-rated unit. The adjustable current dial allows it to be set between 17 and 22 amps based on motor full-load current, ensuring accurate protection during operation. It is commonly used in industrial and building systems to start and protect motors driving pumps, compressors, fans, and conveyors.









