Product description
4.2 Device versions
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
35
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. 3RT2 contactors are available in sizes S00 to S3.
3RT1 contactors are available in sizes S6 to S12.
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 for
star-delta (wye-delta) start)
With its seven sizes, the SIRIUS contactor series covers the entire range up to 250 kW.
Several standard motor ratings are available for each size.
Can be found in the chapter titled ...
About the basic and special versions of the
contactor relays and power contactors
Configuration (Page 67)
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