Siemens SIRIUS 3RT - 3 RA28 Function Modules for Mounting on 3 RT2 Contactors; Description

Accessories
9.25 3RA28 function modules for mounting on 3RT2 contactors
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
364 Manual, 09/2017, A5E03656507120A/RS-AE/006
9.25
3RA28 function modules for mounting on 3RT2 contactors
9.25.1
Description
The SIRIUS modular system features 3RA28 function modules for the delayed switching of
contactors and auxiliary switches (e.g. for switching from star operation to delta operation).
3RA28 function modules are available with screw-type or spring-loaded connections in the
following versions:
● Solid-state time-delay auxiliary switches 3RA281.-..W10
With ON-delay or OFF-delay, without auxiliary voltage
● Solid-state timing relays with semiconductor output 3RA2811-.CW10 and
3RA2812-.DW10
With ON-delay or OFF-delay, with auxiliary voltage
● Star-delta (wye-delta) function module 3RA2816-0EW20
Complete module kit for star-delta (wye-delta) start
Note
No further auxiliary switch blocks may be
mounted on the basic devices when using the
3RA28
function modules.
Note
When using the 3RA2816
-0EW20 function module for star-delta (wye-delta) start, the
following exception applies:
No more than one 3RH29 lateral auxiliary switch block (product ve
rsion E03 and higher)
may be mounted onto the line contactor (Q11) and onto the star (wye) contactor (Q12).
Note
Sizes S00 to S3
Sizes
S00 to S3 use the same function modules.
From product version
*E04* and higher, the 3RA2813/14/15/16 function modules can be
used for mounting on 3RT2.4
contactors (size S3).
The 3RA2811/12
function modules can be used for mounting on 3RT2.1 / 3RT2.2
contactors
(sizes
S00 and S0).
The 3RA2831/32
function modules of product version *E03* and higher can be used for
mount
ing on 3RT2.4 contactors (size S3).