SIEMENS 3RW4047-1BB14 Soft Starter

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                                                                                                                                                                                                                                • The SIEMENS 3RW4047-1BB14 is a SIRIUS 3RW40 S3 soft starter for controlled starting and stopping of three-phase asynchronous motors. It is rated at 106 A and supports motors up to 55 kW at 400 V.

                                                                                                                                                                                                                                  Key Technical Specifications

                                                                                                                                                                                                                                  Specification	Details
                                                                                                                                                                                                                                  Manufacturer	SIEMENS
                                                                                                                                                                                                                                  Model	3RW4047-1BB14
                                                                                                                                                                                                                                  Series	SIRIUS 3RW40
                                                                                                                                                                                                                                  Product Type	Soft Starter
                                                                                                                                                                                                                                  Size	S3
                                                                                                                                                                                                                                  Rated Operational Current	106 A at 40 °C
                                                                                                                                                                                                                                  Motor Power	55 kW at 400 V
                                                                                                                                                                                                                                  Operating Voltage	200–480 V AC
                                                                                                                                                                                                                                  Frequency	50/60 Hz
                                                                                                                                                                                                                                  Control Supply	110–230 V AC/DC
                                                                                                                                                                                                                                  Motor Type	3-phase asynchronous motor
                                                                                                                                                                                                                                  Current Limitation	Adjustable
                                                                                                                                                                                                                                  Motor Overload Protection	Yes
                                                                                                                                                                                                                                  Integrated Bypass	Yes
                                                                                                                                                                                                                                  Thyristors	Yes
                                                                                                                                                                                                                                  External Reset	Yes
                                                                                                                                                                                                                                  Main Circuit	3-pole
                                                                                                                                                                                                                                  Terminals	Screw terminals
                                                                                                                                                                                                                                  Protection	IP20
                                                                                                                                                                                                                                  Operating Temperature	-25 to +60 °C
                                                                                                                                                                                                                                  Dimensions	70 × 170 × 190 mm
                                                                                                                                                                                                                                  Weight	Approx. 1.856 kg

                                                                                                                                                                                                                                  At higher ambient temperatures, the rated current is 98 A at 50 °C and 90 A at 60 °C. The adjustable motor-current setting for overload protection starts at 46 A.

                                                                                                                                                                                                                                  Advantages & Features

                                                                                                                                                                                                                                  • SIRIUS 3RW40 soft-start technology
                                                                                                                                                                                                                                  • Suitable for motors up to 55 kW at 400 V
                                                                                                                                                                                                                                  • 106 A rated operational current
                                                                                                                                                                                                                                  • Adjustable starting current limitation
                                                                                                                                                                                                                                  • Integrated bypass contact system
                                                                                                                                                                                                                                  • Electronic motor overload protection
                                                                                                                                                                                                                                  • Built-in device protection
                                                                                                                                                                                                                                  • External reset function
                                                                                                                                                                                                                                  • Compact S3 design with screw terminals
                                                                                                                                                                                                                                  • Reduces mechanical stress and starting current during motor startup

                                                                                                                                                                                                                                  Typical Applications

                                                                                                                                                                                                                                  • Industrial motor control
                                                                                                                                                                                                                                  • Pumps and fans
                                                                                                                                                                                                                                  • Conveyor systems
                                                                                                                                                                                                                                  • Compressors
                                                                                                                                                                                                                                  • Production machinery
                                                                                                                                                                                                                                  • Material handling equipment
                                                                                                                                                                                                                                  • Industrial automation systems

                                                                                                                                                                                                                                  Installation & Usage Notes

                                                                                                                                                                                                                                  • Verify the motor's rated current and voltage before commissioning.
                                                                                                                                                                                                                                  • Use the 200–480 V AC range for the main motor circuit.
                                                                                                                                                                                                                                  • The control supply requires 110–230 V AC/DC.
                                                                                                                                                                                                                                  • Set the motor overload protection according to the motor nameplate.
                                                                                                                                                                                                                                  • Observe temperature derating, especially above 40 °C.
                                                                                                                                                                                                                                  • Provide appropriate upstream short-circuit and overcurrent protection.
                                                                                                                                                                                                                                  • Ensure sufficient cabinet ventilation and installation clearance.

.The structure and details of the product：

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