Siemens 3RW4424-1BC35 Soft Starter

Feature & Principle

It is Siemens SIRIUS 3RW44 series electronic soft starter. It uses bidirectional thyristor to adjust the output voltage of the motor, realizes stepless smooth start and stop, reduces starting impact current and mechanical shock. It integrates bypass contactor automatically put into operation after starting to reduce heat loss of thyristors. It supports voltage ramp start, torque control, current limiting and many protection functions, can be equipped with PROFIBUS communication module, widely used to protect pumps, fans and belt conveyors.

Specifications

Model: 3RW4424-1BC35 Brand: Siemens Series: SIRIUS 3RW44 Rated current (40℃): 47A Matching power: 22kW @ 400V Main voltage: 200~460V AC Control supply: 115V AC Built-in bypass contactor: Yes Terminal type: Screw terminal Protection functions: Overload, overcurrent, phase loss, overheat Mounting: Cabinet installation Lifecycle: Discontinued legacy spare, successor 3RW55 series Application: Water pump, fan, conveyor, crusher motor soft start Certification: CE, UL

Components & Diagnostics

Thyristor power unit, built-in bypass contactor, control panel, current detection circuit, cooling heat sink, status indicator. Common faults: no starting output, overload alarm, thyristor breakdown, bypass contactor failure, phase loss alarm.

Product Brief

3RW4424-1BC35 soft starter, Siemens SIRIUS 3RW44 motor control spare widely used for pump and fan cabinet overhaul and replacement.