The Siemens 3RW5526-1HA14 is a high-performance SIRIUS 3RW55 Soft Starter designed for the controlled starting and stopping of three-phase induction motors. With a rated operational current of 77A and an operating voltage range of 200–480V AC, this advanced digital soft starter minimizes mechanical stress, reduces inrush current, and improves the operational life of motors and driven equipment. Featuring integrated motor protection, current limiting, torque control, and communication capability, it is ideal for pumps, compressors, conveyors, fans, blowers, and other industrial applications requiring smooth motor control and enhanced system reliability.
• Siemens SIRIUS 3RW55 Series Soft Starter
• Part Number: 3RW5526-1HA14
• Rated operational current: 77A
• Operating voltage: 200–480V AC
• Control supply voltage: 110–250V AC
• Designed for three-phase induction motors
• Integrated motor overload protection
• Advanced current limiting and torque control functions
• Adjustable starting voltage from 20% to 100%
• Adjustable start and stop ramp times up to 360 seconds
• Adjustable current limiting from 125% to 800%
• Built-in bypass functionality for reduced power losses
• Supports PROFINET, PROFIBUS, Modbus TCP, Modbus RTU, and EtherNet/IP communication modules
• Compatible with HMI display modules for advanced monitoring
• Compact design with screw terminal connections
• Reduces mechanical wear and electrical stress during startup
• Suitable for pumps, compressors, fans, conveyors, and blowers
• IEC-compliant industrial motor control solution
• High operational reliability and long service life
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RW55 |
| Part Number | 3RW5526-1HA14 |
| Product Type | Soft Starter |
| Rated Operational Current | 77A |
| Motor Power Rating | 37kW at 400V |
| Supply Voltage | 200–480V AC |
| Control Voltage | 110–250V AC |
| Number of Phases | Three Phase |
| Connection Type | Screw Terminals |
| Starting Voltage | 20% – 100% Adjustable |
| Start Ramp Time | 0 – 360 s |
| Stop Ramp Time | 0 – 360 s |
| Torque Control Range | 10% – 100% |
| Current Limiting Range | 125% – 800% |
| Overload Protection | Integrated |
| Communication Options | PROFINET, PROFIBUS, Modbus TCP, Modbus RTU, EtherNet/IP |
| HMI Compatibility | Supported |
| Degree of Protection | IP00 |
| Frequency | 50/60 Hz |
| Standard Compliance | IEC Standards |
| Application | Pumps, Compressors, Conveyors, Fans, Blowers, Industrial Machinery |
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