Siemens 3RA2942-2G Mechanical Connectors, 10 mm Contactor Clearance Original Brand New

Overview

The Siemens 3RA2942-2G is a high-quality accessory from the SIRIUS industrial control range, specifically designed for creating reliable and safe reversing contactor assemblies. This product is a set of mechanical connectors (or mechanical interlocks) essential for mechanically interlocking two Siemens 3RT243 contactors (Size S3) to prevent both from closing simultaneously—a crucial safety feature for motor reversing applications.

Key Benefit

• Reliable Connection: Ensures secure mechanical linkage between contactors.

• Optimized Clearance: 10 mm spacing guarantees safe and efficient operation.

• High Compatibility: Perfectly suited for Siemens 3RT243 contactors.

• Durable Construction: Long-lasting connectors resistant to wear and mechanical stress.

• Ease of Installation: Simple assembly reduces setup time for electrical systems.

Function / Application

The 3RA2942-2G mechanical interlock is used in electrical control panels, primarily for motor control circuits that require directional change (e.g., conveyor belts, lifts, automated doors).

1. Reversing Starter: It mechanically locks two 3RT243 contactors together to build a robust reversing starter (also known as a reversing contactor assembly or reversing combination).
2. Prevents Overlap: The interlock ensures that when one contactor is energized to drive the motor in one direction, the second contactor (for the reverse direction) cannot be engaged, regardless of the electrical control signal.

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