SIRIUS 3RT2 contactors/contactor assemblies 
  2.7 Accessories 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
187 
2.7.6.3  Operation 
The mechanical latch can be operated with alternating and direct current; it can be activated 
and deactivated electrically and manually. The illustrations below show how to operate the 
mechanical latch manually.  
Table 2- 41  Operating the mechanical latch 
Step  Operating instruction  Image 
1  To activate the latch, press the left plunger. 
2  To deactivate it, press the right plunger. It 
can only be unlocked if the contactor coil is 
not excited.