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Siemens 3AK Operating Instructions Manual Page 34

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

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