Specifications

AS-Interface slaves
Contactors and Contactor Assemblies
SIRIUS 3RA24 contactor assemblies
for wye-delta starting
6/75
Siemens IK PI · 2012
6
■ Overview
These 3RA24 contactor assemblies for wye-delta starting are
designed for standard applications.
Note:
Contactor assemblies for wye-delta starting in special applica-
tions such as very heavy starting or wye-delta starting of special
motors must be customized. Help with designing such special
applications is available from Technical Assistance.
The 3RA24 contactor assemblies for wye-delta starting can be
ordered as follows:
• complete, fully wired and tested, with electrical and mechani-
cal interlocking
• as individual parts for customer assembly
A dead interval of 50 ms on reversing is already integrated in the
function module for wye-delta starting. The auxiliary contacts
used in the contactors (see Chapter 7, "IO-Link") are freely avail-
able.
■ Selection and ordering data
Fully connected and tested contactor assemblies
Components for customer assembly
Assembly kits with wiring modules and mechanical connectors
are available for contactor assemblies for wye-delta starting.
Contactors, overload relays, function modules for wye-delta
starting, auxiliary switches for electrical interlocking – and if
required also feeder terminals – must be ordered separately.
The wiring kits for sizes S00 and S0 contain the top and bottom
main conducting path connections between the line and delta
contactors (top) and between the delta and star contactors
(bottom).
Selection of the contactors for customer assembly
3RA24 1.-8XE31-2BB4 3RA24 2.-8XE32-1BB4 3RA24 2.-8XE32-2BB4
Rated data AC-3 Rated control supply
voltage U
s
1)
Screw terminals Spring-type terminals
Operational
current I
e
up to
Rating of induction motors
at 50 Hz and
Order No. Order No.
400 V 230 V 400 V 500 V 690 V
AkWkW kW kW V
DC operation
Size S00
For AS-Interface connection
12 3.3 5.5 7.2 9.2 24 DC 3RA24 15-8XH31-1BB4 3RA24 15-8XH31-2BB4
16 4.7 7.5 10.3 9.2 24 DC
3RA24 16-8XH31-1BB4 3RA24 16-8XH31-2BB4
25 5.5 11 11 11 24 DC
3RA24 17-8XH31-1BB4 3RA24 17-8XH31-2BB4
Size S0
For AS-Interface connection
25 7.1 11 15.6 19 24 DC 3RA24 23-8XH32-1BB4 3RA24 23-8XH32-2BB4
32 / 40 11.4 15 / 18.5 19 19 24 DC
3RA24 25-8XH32-1BB4 3RA24 25-8XH32-2BB4
50 -- 22 19 19 24 DC
3RA24 26-8XH32-1BB4 3RA24 26-8XH32-2BB4
Rated data AC-3 at AC 50 Hz 400 V Size
Rating Operational
current I
e
Motor current Line/delta contactor Star contactor Complete order no.
kW A A
5.5 12 9.5 ... 13.8 S00-S00-S00 3RT20 15-.BB41-0CC0 3RT20 15-.BB41-0CC0 3RA24 15-8XH31-.BB4
7.5
16 12.1 ... 17 3RT20 17-.BB41-0CC0 3RT20 15-.BB41-0CC0 3RA24 16-8XH31-.BB4
11
25 19 ... 25 3RT20 18-.BB41-0CC0 3RT20 16-.BB41-0CC0 3RA24 17-8XH31-.BB4
11
25 19 ... 25 S0-S0-S0 3RT20 24-.BB40-0CC0 3RT20 24-.BB40-0CC0 3RA24 23-8XH32-.BB4
15
32 24.1 ... 34 3RT20 26-.BB40-0CC0 3RT20 24-.BB40-0CC0 3RA24 25-8XH32-.BB4
18.5
40 34.5 ... 40 3RT20 26-.BB40-0CC0 3RT20 24-.BB40-0CC0 3RA24 25-8XH32-.BB4
22
50 31 ... 43 3RT20 27-.BB40-0CC0 3RT20 26-.BB40-0CC0 3RA24 26-8XH32-.BB4
Kap_06_en.book Seite 75 Freitag, 2. September 2011 1:42 13
© Siemens AG 2011