3RA1962-2A

The Siemens SIRIUS 3RA1962-2A is a dedicated mounting base for reversible (rotational) starters. It can fix two S10 size 3RT1.6 contactors side by side on the same base, which facilitates the assembly of reversible motor starter circuits. It is usually combined with a busbar assembly (such as 3RA1963-2A) and a mechanical interlock to form a complete device.

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Solid image of the mounting base plate for the Siemens SIRIUS 3RA1962-2A forward and reverse contactor.

Product Positioning

The 3RA1962-2A is a mounting base plate from the Siemens SIRIUS series for use with reversible starters. It can fix two S10-sized 3RT1.6 contactors side by side and is one of the basic components for assembling reversible starters.

Core Product Advantages and Features

Dual contactors fixed side by side

The base plate can simultaneously mount two 3RT1.6 type contactors, corresponding to the required combinations for forward and reverse circuits.

The basic component of the complete device

A busbar assembly (such as 3RA1963-2A) and a mechanical interlock are required to form a complete forward and reverse starting device.

Suitable for small and medium power applications

The S10 size base plate is relatively small, making it suitable for configuring forward and reverse control boxes for small and medium power motors.

project	Specification
Product Type	Forward and reverse (reversible) starter mounting base plate
Applicable size	S10
Applicable contactors	2 x 3RT1.6 type contactors
Assembly method	Two contactors are fixed side by side on the same base plate.
use	Form a forward and reverse (reversible) motor starting circuit
Origin	Germany
Product Series	SIRIUS 3RA19

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3RA1963-2A

The Siemens SIRIUS 3RA1963-2A is a bus connection group required for an S10 size forward and reverse (reversible) starter. It connects two 3RT1.6 type contactors to the input and output sides via a bus, and completes the phase sequence conversion on the output side. The main circuit is a 3-pole design, which is suitable for use with a base plate and mechanical interlock to form a complete circuit.

3RA1954-2A

The Siemens SIRIUS 3RA1954-2A is a cross-size mechanical interlock that can be installed between 3RT10, 3RT12, and 3RT14 series contactors of sizes S6, S10, and S12. It prevents two contactors from engaging simultaneously through a mechanical structure and is commonly used in forward and reverse motor starting circuits as a safety backup mechanism in addition to electrical interlocking.

3RA1953-3G

The Siemens SIRIUS 3RA1953-3G is a dedicated connector for star-delta (YD) starters. It is used to connect the output side of an S6-size 3RT1.5 delta contactor to an S3-size 3RT2 star contactor. It is suitable for use with DC coil versions to form an S6-S6-S3 star-delta starting circuit.