Siemens 3RT1955-5AU31 Withdrawable Drive for 3RT105/3RT145 Contactors, AC/DC 240-277V, Screw Terminals Original Brand New

Overview

The Siemens 3RT1955-5AU31 is a highly efficient and versatile withdrawable drive designed for seamless integration with Siemens SIRIUS 3RT105 and 3RT145 power contactors. This innovative operating mechanism offers a flexible solution for both AC (50-60 Hz) and DC applications, operating within a wide control supply voltage range of 240V to 277V.

Its “withdrawable” design simplifies installation, maintenance, and replacement, minimizing downtime in industrial automation and control systems. Featuring screw terminals for secure and reliable electrical connections, the 3RT1955-5AU31 is engineered for robust performance and ease of use in demanding environments.

Key Benefit

• Enhanced Flexibility: Compatible with a wide range of AC and DC control voltages (240-277V), making it suitable for diverse global applications.
• Simplified Maintenance: The withdrawable design allows for quick and easy removal or replacement of the drive without disturbing the main contactor’s wiring, significantly reducing maintenance time.
• Reliable Connections: Equipped with robust screw terminals, ensuring a secure and long-lasting electrical connection, which is critical for operational safety and reliability.
• Optimal Performance: Engineered to meet the high standards of Siemens SIRIUS products, guaranteeing a long service life and dependable operation.
• Space-Saving Design: Its compact and efficient form factor integrates perfectly with the SIRIUS modular system, helping to save valuable panel space.

Function

The Siemens 3RT1955-5AU31 serves as the primary operating mechanism for the 3RT105 and 3RT145 series of power contactors. It receives the control signal and uses it to energize the coil, which in turn actuates the main contacts of the contactor, enabling or disabling the flow of power to the load. The “Standard” and “Economy” circuit functionality allows for optimized energy consumption, where the “economy circuit” reduces holding power once the contactor is engaged, leading to lower energy usage and heat generation.

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