Siemens 3AH3 - Auxiliary Switch Terminals and Release Switching

Description
42 9229 9860 176 0E
2013-08-22
The unassigned auxiliary switch terminals are wired up with the 64-pole plug bottom,
as shown.
Fig. 56 Example – auxiliary switch terminals
Fig. 57 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