Siemens SIRIUS 3RT Series System Manual page 648

SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
7.2 Product description
3RA2816-0EW20 function module for contactor assemblies for star-delta (wye-delta) start
The function module for plugging into contactor assemblies for star-delta (wye-delta) start for
size S00 and S0 comprises the following devices:
● 1 basic module with time setting
● 2 coupling modules with corresponding connecting cable to coupling or function module
Figure 7-1
The function module replaces the entire control circuit wiring and combines the functions of
the following devices and tasks:
● Timing relay star-delta (wye-delta) function
● Auxiliary switches
● Auxiliary conductor wiring
● Electrical interlock
● Switch position indicator for the contactor below (plunger)
648
Star-delta (wye-delta) starter, completely assembled
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03