Siemens 3RW4074-6BB34

Siemens 3RW4074-6BB34 Soft Starter: Reliable Motor Control for Heavy-Duty Applications

Overview

The Siemens 3RW4074-6BB34 is a robust soft starter from the SIRIUS range, designed to control and protect motors in industrial applications, mainly where high power demands are standard. This device offers efficient motor overload protection as part of the S12 control size category. It is suitable for use in systems that require controlled motor start and stop cycles to reduce mechanical stress on machines. With a sturdy build, advanced motor control functions, and Siemens’ engineering reliability, this soft starter is ideal for facilities aiming to optimize motor performance and minimize wear on connected machinery. Additionally, it comes with a 2-year warranty from MRO Electric and Supply, ensuring the unit's peace of mind and support.

Performance and Operating Capacity

The 3RW4074-6BB34 soft starter has an insulation voltage rating of 600 V and operates across a range of voltages, from 200 to 460 V, making it compatible with various industrial power systems. The operating current capability adapts to different ambient temperatures, with a rated current of 280 A at 40°C, 248 A at 50°C, and 215 A at 60°C. This adaptability enhances its performance in fluctuating environmental conditions, ensuring reliable motor protection and consistent performance across various applications. Additionally, the soft starter is compatible with both 50 Hz and 60 Hz operating frequencies, adding further versatility in different settings.

Protective Functions

Built to protect motors from potential overload, the Siemens 3RW4074-6BB34 soft starter safeguards equipment and extends motor lifespan. It features motor overload protection, which prevents damage from high starting currents that could otherwise lead to mechanical stress and increased maintenance needs. With a degree of pollution rating of 3 according to IEC 60947-4-2, it’s designed to operate reliably even in environments with high dust levels or other contaminants. However, the soft starter's IP00 protection rating indicates that it’s best suited for clean, controlled environments or installations within enclosures for enhanced protection.

Physical Design and Installation

The 3RW4074-6BB34 soft starter has dimensions optimized for easy installation, with a height of 230 mm, a width of 160 mm, and a depth of 278 mm. It’s designed for screw fixing, providing a secure attachment that ensures stability even under high operation loads. Current circuit connections feature a busbar connection in the main circuit, while the auxiliary and control circuits utilize screw-type terminals for added convenience. This design facilitates quick installation and ensures a secure fit, minimizing the risk of connection-related issues. With a robust construction that supports installation altitudes up to 5000 meters, this soft starter is ideal for use in diverse geographic locations and challenging settings.

Applications

This soft starter is well-suited for high-power industrial applications like heavy-duty machinery. With a UL/CSA rating of 100 hp at 220/230 V and 200 hp at 460/480 V, it efficiently supports high-horsepower motors, reducing mechanical and electrical stresses through smooth acceleration and deceleration. Its capabilities make it an essential part of systems requiring precise motor control to prevent abrupt starts and stops, enhancing the longevity of machinery.

Frequently Asked Questions (FAQ)

1. What voltage range is supported by the 3RW4074-6BB34 soft starter?

The Siemens 3RW4074-6BB34 soft starter supports a voltage range of 200 to 460 V, making it compatible with most standard industrial power supplies.

2. What is the maximum operating altitude for installation?

This soft starter can be installed at altitudes up to 5000 meters, making it versatile for different geographic and environmental settings.

3. What kind of protection does this soft starter offer?

The 3RW4074-6BB34 provides motor overload protection and is rated with a degree of pollution 3, according to IEC 60947-4-2. However, with an IP00 rating, it should be installed in a clean environment or protective enclosure for optimal durability.

4. Is this unit suitable for high-power applications?

Yes, with UL/CSA ratings of 100 hp at 220/230 V and 200 hp at 460/480 V, it supports high-power applications and is particularly effective for heavy-duty industrial use.

5. What connections are used for the main and auxiliary circuits?

The main current circuit utilizes busbar connections, while the auxiliary and control circuits feature screw-type terminals for secure and efficient installation.

Siemens products are manufactured in Germany and are designed for Automotive, aerospace, power generation, and electronics usage. They come with a 2-year warranty from MRO Electric. We also carry Breakers from other manufacturers such as FANUC and Yaskawa.

Contact Us Today For More Information About Siemens Products

Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at sales@mroelectric.com, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 3RW4074-6BB34, take a look at more from our Breakers line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 3RW4074-6BB34 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.