Siemens 3AK1 - Page 34

Description
34 9229 9923 176 0B
2013-09-09
The unassigned auxiliary switch terminals are wired up (as shown) with the 64-pole
plug bottom.
Fig. 38 Example – auxiliary switch terminals
Fig. 39 Sample switching operation for connection of the undervoltage release Y7
Normal auxiliary switch Extended auxiliary switch
No wiring required if
a) 2nd shunt release Y2 available
b) Undervoltage release Y7 available
a) b)
System wiring Tripping via NO con-
tact
Tripping via
NC contact
System wiring
Circuit-breaker wiring