Siemens SIRIUS 3RT Manual page 151

6.13 Starting three-phase motors with reduced starting current peaks (contactor assembly for star-delta (wye-
delta) start)
Table 6- 9 Spring-loaded connection
Rated data for 50 Hz
400 V AC
Power [kW] Operational
I
current [A]
e
5.5 12
7.5 16
11 25
11 25
15 32
18.5 40
22 50
22 / 30 45 / 60
37 80
45 86
55 115
55 115
75 150
90 160
Note
The selection of contactor types refers to a fused design.
Connection example with spring-loaded connection and large conductors, e.g. with 6 mm
cross-section
For a contactor assembly for star-delta (wye-delta) start, e.g. 3RA2426-8XH32-2BB4
(22 kW, 50 A), it is possible to select the following connection type with a 6 mm
cross-section:
● Remove the upper wiring modules to connect the main current paths between line
contactor (Q 11) and delta contactor (Q 13).
● Separate infeed of line contactor (Q 11) and delta contactor (Q 13) with 6 mm
in a three-way network).
Two conductors per phase with 6 mm
central infeed short-circuit protection device and only one conductor per phase to the
contactors.
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
Size
Motor current
[A]
9.5 ... 13.8 S00-S00-S00
12.1 ... 17
19 ... 25
19 ... 25 S0-S0-S0
24.1 ... 34
34.5 ... 40
31 ... 43
31 ... 43 S2-S2-S0
62.1 ... 77.8
69 ... 86
77.6 ... 108.6 S2-S2-S2
77.6 ... 108.6 S3-S3-S2
120.7 ... 150
86 ... 160
Article number
Line / delta con- Star contactor
tactor
3RT2015-2.... 3RT2015-2....
3RT2017-2.... 3RT2015-2....
3RT2018-2.... 3RT2016-2....
3RT2024-2...0 3RT2024-2...0
3RT2026-2...0 3RT2024-2...0
3RT2026-2...0 3RT2024-2...0
3RT2027-2...0 3RT2026-2...0
3RT2035-3...0 3RT2026-2...0
3RT2035-3...0 3RT2027-2...0
3RT2036-3...0 3RT2028-2...0
3RT2037-3...0 3RT2035-3...0
3RT2045-3...0 3RT2035-3...0
3RT2045-3...0 3RT2036-3...0
3RT2046-3...0 3RT2037-3...0
conductor cross-section are connected to the
2
Configuration
Complete assembly
3RA2415-8XF31-2...
3RA2416-8XF31-2...
3RA2417-8XF31-2...
3RA2423-8XF32-2...
3RA2425-8XF32-2...
3RA2425-8XF32-2...
3RA2426-8XF32-2...
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--
--
--
--
--
--
connection
2
conductor
2
(permitted
2
151