Product Description
The Siemens 3RA1120-1KD26-0BB4 is a robust and reliable direct-on-line (DOL) starter designed for efficient motor control and protection. This pre-wired and tested starter combination integrates a SIRIUS 3RV2 circuit breaker for short-circuit protection and a SIRIUS 3RT2 contactor for switching the motor, ensuring coordinated protection and seamless operation. It features a wide setting range, allowing precise adaptation to various motor ratings, and provides overload protection via the integrated overload relay, safeguarding the motor from damage due to excessive current draw. The compact design facilitates easy installation in control panels, saving valuable space, while the screw-type terminals ensure secure and dependable connections. This DOL starter is suitable for a broad range of industrial applications requiring dependable motor starting and stopping, contributing to increased system uptime and reduced maintenance costs. The 3RA1120-1KD26-0BB4 offers a comprehensive and dependable solution for motor control needs.
Is Your Device Showing These Signs?
The Siemens 3RA1120-1KD26-0BB4 commonly presents issues such as thermal overload relay tripping due to incorrect current settings or faulty bimetallic strips, causing motor starter failure. Contact wear on the main and auxiliary contacts leads to increased resistance, voltage drops, and eventual operational failure. Coil burnout from voltage fluctuations or overheating is a frequent problem, necessitating coil replacement. Inspect wiring connections for looseness or corrosion, which induces erratic behavior and component damage. Verify proper ambient temperature and ventilation to prevent premature component degradation and ensure optimal performance of the motor starter assembly.
Technical specifications
The Siemens 3RA1120-1KD26-0BB4 is a direct-on-line (DOL) starter, size S0, designed for reliable and efficient starting of three-phase asynchronous motors up to 7.5 kW at 400V AC. This complete starter unit integrates a SIRIUS 3RV2 circuit breaker for short-circuit and overload protection, a SIRIUS 3RT2 contactor for switching the motor, and a pre-wired assembly to simplify installation and reduce wiring errors. The circuit breaker offers adjustable overload current settings from 5.5 to 8 Amperes, providing precise motor protection tailored to specific application requirements. The contactor features screw terminals for secure and dependable electrical connections, ensuring minimal downtime and enhanced operational safety. The 3RA1120-1KD26-0BB4 is characterized by its compact design, robust construction, and adherence to international standards, making it suitable for a wide range of industrial applications where dependable motor starting and protection are paramount. The device is equipped with auxiliary contacts for signaling and interlocking functions, further enhancing its integration capabilities within complex control systems. This pre-assembled and tested starter guarantees optimal performance and longevity, contributing to increased productivity and reduced maintenance costs.
Our Repair Process for the
3RA1120-1KD26-0BB4
Our repair process for the Siemens 3RA1120-1KD26-0BB4 motor starter begins with a thorough inspection of the thermal overload relay, verifying current settings and the integrity of the bimetallic strips to address tripping issues. We meticulously examine the main and auxiliary contacts for wear, addressing any increased resistance or voltage drops by cleaning or replacing contacts as needed. Coil burnout is resolved through direct coil replacement, ensuring proper voltage and thermal management. Wiring connections are scrutinized for looseness or corrosion, with all connections tightened or replaced to eliminate erratic behavior. Ambient temperature and ventilation are assessed to confirm they meet operational specifications, preventing future component degradation and ensuring optimal performance of the motor starter assembly.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.
Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.