SIRIUS 3RT2 contactors/contactor assemblies 
  2.7 Accessories 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
221 
2.7.25.2  Mounting 
The contactor assemblies for star-delta (wye-delta) start can be built from contactors with 
screw connections or spring-loaded connections:  
●  Line contactor (Q11): Left 
●  Delta contactor (Q13): Center 
●  Star contactor (Q12): Right 
 
This arrangement applies for all installation instructions described in this chapter. 
The illustration below shows example procedures for assembling the contactor assembly for 
star-delta (wye-delta) start in size S0 with screw-type connection. Operating instructions 1 to 
6 show how to assemble the contactors using the components supplied in the assembly kit. 
Assembling the contactor assembly for star-delta (wye-delta) start with screw-type connection - size 
S0 
Table 2- 73  Assembling the contactor assembly for star-delta (wye-delta) start with screw-type 
connection (size S0) 
Step  Operating instruction  Figure 
1  Pull the adhesive label off the nameplate on 
the left-hand side of contactor Q12 and off 
the nameplate on the right-hand side of 
contactor Q13 (not illustrated). 
 
2  Insert the connecting clips into the openings 
on contactor Q13. 
3  Secure the mechanical interlock on the left-
hand side of contactor Q12. 
4  Connect contactors Q11 and Q13 together. 
5  Insert the connecting clips into the openings 
on contactor Q12. 
6  Connect contactors Q11/Q13 and Q12 
together. 
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