SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
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Responsibility of the user for system configuration and functionality
The SIRIUS modular system offers various switching devices for the safe and functional
switching of electrical loads. 3RT2 contactors are available in sizes S00 to S3.
3RT1 contactors are available in sizes S6 to S12.
● 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)
Siemens AG, its regional offices, and associated companies (hereinafter referred to as
"Siemens") cannot guarantee all the properties of an overall installation or machine that has
not been designed by Siemens.
Nor can Siemens assume liability for recommendations that appear or are implied in the
following description. No new guarantee, warranty, or liability claims beyond the scope of the
Siemens general terms of supply are to be derived or inferred from the following description.
Note
When designing a system, comply with all valid national installation specifications and
standards.
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