CIRCUTOR OPTIM P&P Series - Manual (Page 12)

3.7.1. CAPACITOR BANK WITH AUXILIARY VOLTAGE OBTAINED FROM AN INTERNAL
AUTOTRANSFORMER
Does not require connection of the external neutral. The label indicates U
aux
/f … internal
Figure 4: Auxiliary power supply with autotransformer.
3.7.2. CAPACITOR BANK WITH AUXILIARY VOLTAGE OBTAINED BETWEEN
PHASE-NEUTRAL
Requires the connection of the external neutral to terminal N (see Figure 5 and Figure 7 )
The label indicates Uaux/f … (control voltage)
Figure 5: Auxiliary power supply with neutral.
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OPTIM P&P Series
Instruction Manual