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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RW3028-1BB14 |
| Alternative Part Number | 3RW30281BB14 |
| Manufacturer | Siemens |
| Product Type | Soft Starter |
| Phase | 3 Phase |
| Operational Current | 38 A @ 40 °C |
| Operational Voltage | 200-480 V AC |
| Control Supply Voltage | 110-230 V AC/DC |
| Power Rating | 18.5 kW/400 V |
| Frequency | 60 Hz |
| Dimensions | 45 x 153 x 125 mm |
| Mounting Type | Screw and snap-on mounting |
| Number of Poles | 3 for main current circuit |
| Ambient Operating Temperature | -25 … 60 °C during operation, -40 … 80 °C during storage |
| Protection Class | IP20 |
| Product Designation | Soft starters for standard applications |
| Connection Type | Screw-type terminals for main and auxiliary/control current circuits |
| Installation Altitude | Up to 5,000 m above sea level |
| Cable Length (max) | 300 m |
| Commodity Code | 853710 |
The Siemens 3RW3028-1BB14 soft starter is a compact and efficient solution designed to optimise the start-up process of three-phase motors. This device is engineered to reduce the mechanical stress on motor control systems, thereby extending the lifespan of both the motor and the equipment it powers. With a current rating of 38 A at 40 °C and the capability to handle motors up to 18.5 kW/400 V, it is suitable for a wide range of industrial applications.
The soft starter operates within a supply voltage range of 200-480 V AC and accepts control voltages of 110-230 V AC/DC, making it versatile for global use. The unit's dimensions are 45 x 153 x 125 mm, which allows for convenient integration into existing setups without requiring significant space. Installation is made simple with screw terminals, providing a secure and reliable connection.
Designed with robustness in mind, the 3RW3028-1BB14 can operate in challenging industrial environments. It is built to withstand ambient operating temperatures ranging from -25 to 60 °C, ensuring consistent performance even in extreme conditions. The device also features a red fault signal display for quick diagnostics and troubleshooting.
This soft starter is part of the SIRIUS range, known for its reliability and innovation in motor control technology. It is an ideal choice for those looking to improve their motor start-up sequences, reduce energy consumption, and minimise wear and tear on mechanical components. Whether used in conveyor systems, pumps, fans, or compressors, the Siemens 3RW3028-1BB14 offers a blend of performance, durability, and ease of use that can contribute to the smooth operation and efficiency of your industrial processes.
Commonly Asked Questions
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Read more...Is Marvo a credible parts supplier?
Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.
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Frequently Asked Questions
What is the purpose of a soft starter like this Siemens model?
A soft starter is designed to reduce the inrush current and torque of electric motors during start-up. This helps in reducing mechanical stress on the motor and the electrodynamic stresses on the power cables and electrical distribution network, extending the lifespan of the system.
Can this soft starter be used with three-phase motors?
Yes, this Siemens soft starter is specifically designed for use with three-phase motors, providing smooth ramp-up and ramp-down control to minimise mechanical stress.
What are the voltage requirements for this soft starter?
The soft starter operates with a control supply voltage of 110-230V AC/DC and can handle a motor operating voltage in the range of 200-480V AC.
What is the maximum operational altitude for this soft starter?
The soft starter can be installed at an altitude of up to 5,000 meters above sea level without derating.
What are the dimensions of this soft starter?
The dimensions of the soft starter are 45 mm in width, 125 mm in height, and 150 mm in depth.
Is there a specific way to mount this soft starter?
Yes, the soft starter can be mounted using screw and snap-on mounting methods and should be positioned with a vertical mounting surface that is +/-10° rotatable.
What is the rated operational current of this soft starter?
The rated operational current for this soft starter at 40°C is 38A.
Does this soft starter have an integrated bridging contact system?
Yes, this Siemens soft starter comes with an integrated bridging contact system.
What type of terminals does this soft starter have for electrical connections?
This soft starter is equipped with screw-type terminals for both the main current circuit and the auxiliary and control current circuit.
What is the ambient temperature range in which this soft starter can operate?
The soft starter is designed to operate within an ambient temperature range of -25 to 60°C.
Part conditions explained
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