3RA2943-2AA1

The Siemens 3RA2943-2AA1 is a wiring kit for the SIRIUS 3RA29 series of reversible starters. It is suitable for S3 size contactor combinations and provides both electrical wiring and mechanical interlocking to ensure that the forward and reverse contactors do not operate simultaneously. Installation is completed with screw terminals, and it is an essential accessory for assembling reversible motor starters.

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Siemens 3RA2943-2AA1 SIRIUS forward and reverse wiring kit S3

Product Positioning

The 3RA2943-2AA1 is a wiring kit specifically designed for reversible motor starters, suitable for combining two S3-size contactors to form a forward and reverse circuit. Unlike simple star-delta wiring kits, this model also includes a mechanical interlocking mechanism, structurally preventing the forward and reverse contactors from engaging simultaneously, thus improving system safety.

Core Product Advantages and Features

Electrical and mechanical integration

The kit includes both wiring components and mechanical interlocking mechanisms, providing a complete solution.

Prevent simultaneous attraction

Mechanical interlocking can prevent phase-to-phase short circuits caused by malfunctions of forward and reverse contactors.

Applicable to S3 size contactors

A forward and reverse starter consisting of two S3-sized contactors.

Screw terminal wiring

The wiring section uses standard screw terminals for easy installation and subsequent maintenance.

Paired with SIRIUS 3RT2 series

It can be combined with a 3RT2 contactor of the corresponding size to form a complete reversible starter.

project	Specification
Product Type	Reversible (reversible) electrical and mechanical wiring kit
Applicable size	S3
Applicable series	SIRIUS 3RT2 contactor
Wiring method	Screw terminals
security agencies	Including mechanical chain

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