The Siemens SIRIUS 3RW5546-6HA14 Soft Starter is an advanced motor starting solution engineered for controlled acceleration and deceleration of three-phase AC motors in demanding industrial environments. Part of the SIRIUS 3RW55 series, the soft starter provides intelligent motor protection, torque control, current limiting, pump control functions, and integrated bypass operation. By reducing inrush current and mechanical shock during startup, the unit helps extend motor life, minimize wear on belts, gears, pumps, conveyors, compressors, fans, crushers, and process equipment. The device includes a graphical display with parameterization functions, communication capability, and comprehensive diagnostic features for industrial automation systems. It is widely used in water treatment plants, HVAC systems, process industries, mining, material handling systems, and manufacturing facilities requiring reliable motor starting performance.
Product Specifications
| Specification | Details |
| Brand | Siemens |
| Series | SIRIUS 3RW55 |
| Model | 3RW5546-6HA14 |
| Product Type | Soft Starter |
| Starter Type | Electronic Motor Soft Starter |
| Rated Operational Current | 250 A |
| Motor Power @ 400V | 132 kW |
| Motor Power @ 690V | 250 kW |
| Rated Operational Voltage | 200 – 690 V AC |
| Control Supply Voltage | 110 – 250 V AC/DC |
| Frequency | 50/60 Hz |
| Integrated Bypass | Yes |
| Starting Method | Voltage Ramp Soft Start |
| Stopping Method | Soft Stop |
| Current Limiting Function | Yes |
| Torque Control | Yes |
| Pump Control Function | Yes |
| Motor Protection Functions | Integrated |
| Overload Protection | Yes |
| Phase Loss Protection | Yes |
| Phase Imbalance Monitoring | Yes |
| Communication Capability | Optional Expansion Modules |
| Display Type | Graphical Display |
| Mounting Type | Panel Mount |
| Cooling Method | Forced Air Cooling |
| Protection Class | IP20 |
| Operating Temperature | -25°C to +60°C |
| Application | Motor Starting & Protection |
| Suitable For | Pumps, Fans, Compressors, Conveyors |
| Standards | IEC 60947-4-2 |
| Country of Brand Origin | Germany |
