3RA2933-2BB1

The 3RA2933-2BB1 is a star-delta starter wiring kit for the Siemens SIRIUS modular system. It is sized to fit S2 contactors, features a three-pole design with screw terminals, and can quickly assemble three S2 contactors into a star-delta reduced-voltage starter circuit, balancing electrical connection and mechanical fixation. It is an original product and comes with an authorized distributor warranty.

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Siemens 3RA2933-2BB1 Star-Delta Wiring Kit with S2 Screw Terminals

Product Positioning

The 3RA2933-2BB1 is a star-delta (Y-Δ) step-down starter wiring kit designed specifically for Siemens SIRIUS S2 size contactors. It uses screw terminals to complete the electrical and mechanical connection between the three contactors. This kit effectively reduces panel assembly time and ensures precise wiring alignment, making it a key component in building standard star-delta starters.

Core Product Advantages and Features

Star-delta integrated wiring

The electrical wiring and mechanical fixing between the three S2 contactors are completed simultaneously, eliminating the tedious process of manually wiring each one.

Screw terminal connection

Featuring a screw terminal design, the contacts are secure and reliable, making it suitable for long-term operation in industrial switchboard environments.

S2 size only

It is compatible with Siemens SIRIUS S2 specification contactors, with high assembly fit and excellent installation accuracy.

Genuine product guaranteed

Kenxin Motors is an authorized distributor of Siemens, providing genuine product warranties and professional technical consulting services.

Improve assembly efficiency

Modular design significantly reduces the manufacturing time of distribution panels and lowers the risk of errors in manual wiring.

project	Specification
Product Name	Star-delta wiring harness (electrical and mechanical)
Applicable contactor size	S2 / S2 / S2 (three contactors)
Startup method	Star-delta (Y-Δ) reduced voltage start
Extreme number	3 poles
Terminal type	Screw terminals
Packaging size	52 × 146 × 93 mm
net weight	Approximately 0.178 kg
country of origin	Germany
series	Siemens SIRIUS 3RA29 series

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3RA2933-2AA1

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