Siemens SIRIUS 3RT1 & 3RT2 Series – Power & Vacuum Contactors:

The 3RT1 contactors are equipped with conventional AC / DC and solid-state AC / DC operating mechanism options. The solid-state operating mechanism has two operating modes and can be optionally equipped with a remaining lifetime signal. The 3RT2 contactors are climate-proof and are suitable and tested for use worldwide, sizes S00 to S2, up to 37 kW. 3RT2 contactors are available in sizes S00 to S3. 3RT1 contactors are available in sizes S6 to S12.

Various different switching devices are available for switching electrical loads. The contactor is the ideal device for performing switching operations, which are frequently repeated. it is the most commonly used switching device in industry, mechanical engineering, and the manufacture of switching stations.

The SIRIUS range of contactors encompasses:

3RT.0 power contactors and 3RT12 vacuum contactors for switching motorized loads

4-pole 3RT23 contactors for switching resistive loads

3-pole 3RT24 / 3RT14 contactors for switching resistive loads

4-pole 3RT25 contactors for changing the polarity of hoisting gear motors

3RH2 contactor relays for switching in the control circuit

3RT26 capacitor contactors for switching capacitive loads (AC-6b)

3RT1 / 3RT2 / 3RH2 contactors with extended operating range
– 3RT10 / 3RT20 / 3RH21 contactors for rail applications
– 3RT20 / 3RH21 coupling relays for system-compliant interaction with electronic controllers

3RT1...-.S.36 contactors with fail-safe control inputs for safety-related applications

Operation of a motor in two directions of rotation (reversing contactor assembly)

Starting three-phase motors with reduced starting current peaks (contactor assemblies forstar-delta (wye-delta) start)

3RT1 Series Features:

Screw Connection

All models vary with Current rating and Voltage.

Various NO/NC Values

3RT2 Series Features:

Size S00, up to 7.5 kW

Size S0, up to 18.5 kW

Size S2, up to 37 kW

Screw connection / Spring Clamp

Impulse voltage resistance 6 kV

Insulation voltage 690 V

Real loss power only 4 W

Designation K according to DIN 40719 (extendable to IEC 204-2) & IEC 750; Q according to DIN EN 61346-2