Siemens 3RA1953-3P SIRIUS 3‑Pole Link Rail Set for 3RT1.5 Reversing Contactor Original Brand New

Overview

The Siemens SIRIUS 3RA1953-3P is a crucial accessory designed for the efficient and safe wiring of 3RT1.5 reversing contactor assemblies. This set of pre-configured link rails, complete with the necessary connection screws, provides a neat, reliable solution for connecting the infeed side of your contactor combination. It is specifically engineered to perform phase swapping (reversal) directly at the power supply input, ensuring proper motor direction control in a compact and standardized manner.

• Brand: Siemens SIRIUS

• Part Number: 3RA1953-3P

• Accessory Type: Link Rail Set / Wiring Kit

• Application: Reversing Contactor Assemblies 3RT1.5 (Contactor Size S6/S10, based on context)

• Connection Location: Infeed side (top)

• Function: Integrated Phase Swapping

Key Benefit

• Simplified Installation: Reduces complex wiring, labor time, and potential connection errors through pre-fabricated, standardized link rails.

• Enhanced Safety & Reliability: Ensures a secure and robust electrical connection, minimizing the risk of faults compared to manual wiring.

• Compact Design: Achieves a space-saving reversing combination by eliminating the need for long, bulky external wiring on the infeed side.

• Phase Swapping Function: Built-in connection structure to correctly manage the phase reversal required for motor direction change in a reversing starter setup.

• Original Siemens Quality: Guarantees compatibility and performance within the SIRIUS modular system.

Function & Compatibility

The 3RA1953-3P link rail set connects the incoming power (infeed) to the two contactors in a reversing assembly, such as those built with the 3RT1.5 series contactors.

• For use with: Siemens 3RT1.5 Contactors (e.g., Size S6 and up, often associated with this part number range).

• Purpose: Mechanically and electrically link two contactors to form a single, functional reversing starter combination.

• Mechanism: The rails are designed to cross phases, enabling the motor to run in the reverse direction when the second contactor is activated, a vital feature for applications like hoists, conveyors, and automated machinery.

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