Siemens 3AH37 Operating Instructions Manual page 41

a)
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2013-07-08
b) c)
1) Integrated varistor
2) Integrated rectifier for AC/DC≥ 100 V
3) Attention: connect L+ for direct current (DC)
a) Undervoltage release
b) Low-energy trip-coil
c) 1st transformer-operated release
d) Signal: spring state with 64-pole plug-connector
e) Signal: spring state with 24-pole plug-connector
f) Breaker tripping signal for 64-pole plug-connector
Fig. 54 Sample circuit diagram (part 3) of the vacuum circuit-breaker
d)
Description
e) f)
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