Siemens SIRIUS Domestic Control and Protection System

S0 specification (3RT602): Width 45mm, AC-3 rated current 9-38A, corresponding to 400V motor power 4-18.5kW, mechanical life up to 10 million cycles.

S3 specification (3RT504): Width 70mm, AC-3 rated current 65-95A, corresponding to 400V motor power of 30-45kW, rated insulation voltage up to 1000V.

S12 specification (3RT507): Maximum specification, AC-3 rated current up to 400-500A, capable of controlling 250kW motors at 400V.

3RH6 intermediate relay: flexible control logic expansion

The 3RH61 4-pole intermediate relay serves as an amplification and isolation unit for control signals, and is a bridge connecting PLC weak current signals with contactor coils.

Compact design: Adopting S00 specifications (45mm wide), the body integrates 4 contacts (configurable as 2NO+2NC, 3NO+1NC, etc.).

High reliability: It also meets the high reliability requirements at 17V/1mA and is suitable for small control signals.

Strong compatibility: Its accessories (auxiliary contact block, surge suppressor) are fully compatible with S00 standard contactors, reducing spare parts inventory costs.

3RU6/3RU5 Thermal Overload Relay: Precise Overload and Phase Loss Guardian

As the ultimate execution unit for motor overload protection, the 3RU series works in conjunction with the 3RT contactor.

Precise protection: Provides Class 10 trip level with environmental temperature compensation function (some models have a compensation range of -40 ° C to+60 ° C), ensuring that the set current is not affected by environmental temperature.

Humanized design: Integrated manual/automatic reset selection, testing button, trip status indicator, and stop button for easy on-site debugging and operation.

Complete product line:

3RU6116/3RU6126: Suitable for S00/S0 contactors, with a current setting range of 0.11-40A.

3RU5136/3RU5146: Suitable for S2/S3 contactors, with a current setting range of 5.5-100A.

3RU5156/3RU5176: High current model, suitable for S6/S10/S12 contactors, with a current setting range of 55-500A.

Flexible installation: You can choose to directly plug it into the corresponding contactor or install it separately through an independent mounting bracket.

Attachment ecosystem: achieving customized functionality

The strength of the SIRIUS system is largely due to its rich accessory system, which enables standard products to adapt to ever-changing application scenarios.

Connection system: The three-phase insulated busbar (3RV1915) can quickly and clearly connect multiple parallel circuit breakers; The contactor circuit breaker connection module (such as 3RA1921) enables direct electrical and mechanical connection between the two.

Operation and instruction accessories: door coupling operating mechanism, various auxiliary contacts, signal contacts, mechanical reset extension rod, etc.

Protective accessories: Various types of surge suppressors (resistors, varistors, diodes) are used to suppress overvoltage generated when the contactor/relay coil is disconnected and protect the control circuit.

Certification and Reliability Assurance

The entire series of products comply with international standards such as IEC/EN 60947, and have obtained multiple certifications such as CCC, CE, UL, etc. This is not only a passport to market access, but also a reflection of their design, materials, and manufacturing processes reaching international safety and quality standards. The mechanical and electrical lifespan parameters, reaching millions of cycles, provide data support for the long-term, fault free operation of the equipment.