Siemens SIRIUS 3RT2 - Page 4

Table of contents
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
4 Manual, 02/2019, A5E03656507620A/RS-AD/005
7.3 Mounting ................................................................................................................................ 40
7.3.1 Function modules for direct-on-line start (electronic timing relay with semiconductor
output/solid-state time-delay auxiliary switch) ....................................................................... 40
7.3.2 Function module for star-delta (wye-delta) start .................................................................... 42
7.4 Disassembly ........................................................................................................................... 49
7.4.1 Function modules for direct-on-line start (solid-state timing relay with semiconductor
output/solid-state time-delay auxiliary switch) ....................................................................... 49
7.4.2 Function module for star-delta (wye-delta) start .................................................................... 51
7.5 Replacing the removable terminal ......................................................................................... 53
8 Connection ........................................................................................................................................... 55
8.1 Connecting the function modules for direct-on-line start ....................................................... 55
8.1.1 Connecting the solid-state timing relay with semiconductor output ....................................... 55
8.1.2 Connecting the solid-state time-delay auxiliary switch .......................................................... 57
8.2 Connecting the function module for star-delta (wye-delta) start ............................................ 59
8.3 Conductor cross-sections ...................................................................................................... 60
8.3.1 Conductor cross-sections for screw-type connection systems .............................................. 60
8.3.2 Conductor cross-sections for spring-loaded connection systems ......................................... 61
9 Operation .............................................................................................................................................. 63
9.1 Setting the times .................................................................................................................... 63
10 Accessories .......................................................................................................................................... 65
10.1 Sealable cover ....................................................................................................................... 65
11 Technical data ...................................................................................................................................... 67
11.1 Technical data in Siemens Industry Online Support .............................................................. 67
12 Circuit diagrams .................................................................................................................................... 69
12.1 CAx data ................................................................................................................................ 69
12.2 Internal circuit diagrams ......................................................................................................... 70
12.3 Typical circuits ........................................................................................................................ 71
A References ........................................................................................................................................... 73
A.1 References ............................................................................................................................. 73
A.2 Manuals - SIRIUS Modular System ....................................................................................... 74
B Dimension drawings .............................................................................................................................. 77
B.1 CAx data ................................................................................................................................ 77
B.2 Dimensions in mm.................................................................................................................. 78
B.3 Solid-state timing relays with semiconductor output and solid-state time-delay auxiliary
switches ................................................................................................................................. 78
B.4 Star-delta (wye-delta) modules .............................................................................................. 80
Index .................................................................................................................................................... 83