APX A: Optional Accessories | VFD-VJ
Apx A-9
A-4 Reactor
Installing an AC reactor on the input side of a hybrid servo drive can increase line impedance, improve the
power factor, reduce input current, and reduce interference generated from the hybrid servo drive. It also
reduces momentary voltage surges or abnormal current spikes. For example, when the main power
capacity is higher than 500 kVA, or when using a switching capacitor bank, momentary voltage and current
spikes may damage the hybrid servo drive’s internal circuit. An AC reactor on the input side of the hybrid
servo drive protects it by suppressing surges.
Installation:
As shown in the image below, an AC input reactor is installed between the mains power inputs and the R S
T input terminals on the hybrid servo drive.
R/L1 S/L2 T/L3
U/T1
V/T2
W/T3
E
+
B1
B2
-
E
M
AC reactor
(input side)
Power inputs
Connecting an AC input reactor
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