PRODUCT DESCRIPTION
SIEMENS 3RW4757-6SC44 - High-Feature Soft Starter
The SIEMENS SIRIUS 3RW447 soft starter is engineered for controlled soft starting and stopping of three-phase asynchronous motors, mitigating mechanical shock and reducing current peaks during startup. This microprocessor-controlled device integrates comprehensive motor protection functions and features an internal bypass for energy efficiency once the motor reaches full speed. It is designed for demanding industrial applications such as pumps, fans, compressors, and conveyors, where precise motor control and system longevity are critical.
Technical Specifications:
- SERIES/FAMILY: SIRIUS 3RW44
- COMPONENT TYPE: High-Feature Soft Starter
- ELECTRICAL SPECS:
- OPERATIONAL VOLTAGE: 200-690V AC
- OPERATIONAL CURRENT (Ie): 570A (at 400V)
- CONTROL VOLTAGE: 24V AC/DC
- POWER RATING (TYPICAL): 315 kW (at 400V), 500 kW (at 690V) for standard duty
- PHASE: 3-Phase
- FREQUENCY: 50/60 Hz
- MECHANICAL/PHYSICAL:
- FORM FACTOR: Enclosed module for panel mounting
- BYPASS: Integrated bypass contactor
- INTERFACE/CONTROL:
- COMMUNICATION PROTOCOL: PROFINET, PROFIBUS DP (via integrated module)
- FEEDBACK: Integrated motor protection (overload, phase failure, thermistor input)
- CONTROL INPUTS: Digital inputs for START/STOP, RESET
- OUTPUTS: Relay outputs for operational status, fault indication
- ENVIRONMENTAL/MOUNTING:
- IP RATING: IP00 (main circuit), IP20 (terminals) - requires enclosure
- COOLING METHOD: Natural convection / Forced air (integrated fan)
- MOUNTING STYLE: Panel mounting, screw fixing
- COMPATIBILITY/APPLICATION:
- MOTOR TYPE: 3-phase asynchronous motors
- APPLICATIONS: Pumps, fans, compressors, conveyors, mixers, centrifuges, and other heavy-duty industrial drives requiring controlled acceleration and deceleration.