Configuration
6.13 Starting three-phase motors with reduced starting current peaks (contactor assembly for star-delta (wye-
delta) start)
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
148 Manual, 09/2017, A5E03656507120A/RS-AE/006
Variants and rated powers
The contactor assemblies for star-delta (wye-delta) start are available with a uniform power
range of 5.5 kW to 55 kW (utilization category AC-3).
The 3RA24 contactor assembly for star-delta (wye-delta) start of sizes S00 to S3 is available
in two versions:
● Fully wired and tested with electrical and mechanical interlock
● Kit for self-assembly
Contactor assemblies for star-delta (wye-delta) start of sizes S6 to S12:
● Wiring kit for self-assembly
The SIRIUS modular system offers 3RA27 function modules for connection to the
automation level; they are fitted with terminals for connection to AS-Interface or IO-Link.
Note
We recommend installing contactor assemblies on a mounting plate. The mounting plate can
be ordered as an individual unit. (Extension can be used for 3RP25 / 3RP15).
Note
If the contactor assembly for star
-delta (wye-delta) start is to be connected to a control for
communication capability, a contactor must be selected (3RT2...
-.....-0CC0).
contactor assembly for star-delta (wye-delta) start, the auxiliary switches
integrated in the contactor can still be used. Additional auxiliary switch blocks cannot be
fitted with the function modules attached.
The function module replaces all the wiring in the control circuit and can be used in the
voltage range from 24 to 240 V AC/DC. The changeover delay of 50 ms (timing relay
functionality) is already integrated in the star-delta (wye-delta) function module.
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