Operating Instructions

Optional Accessories
AC/DC Reactor
398 | 443
The excessive length of the output wires makes the grounded stray capacitance too large, increases the three-
phase output common mode current, and the reflected wave of the long wires makes the motor dv/dt and the motor
terminal voltage too high. Installing a reactor on the drive’s output side can increase the high-frequency impedance
to reduce the dv/dt and terminal voltage to protect the motor.
Install an AC output reactor in series between the three output phases U V W and the motor, as shown in the figure
below:
Fig. 132:
DC Choke
A DC Choke can also increase line impedance, improve the power factor, reduce input current, increase system
power, and reduce interference generated from the motor drive. A DC reactor stabilizes the DC bus voltage.
Compared with an AC input reactor, a DC choke is smaller, lower price, and lower voltage drop (lower power
dissipation).
Install a DC choke between terminals +1 and +2. Remove the jumper, as shown in the figure below, before
installing a DC choke.
NOTE: 115V models do not have a DC choke.
Fig. 133: DC Reactor.
Applicable Reactors
115V, 50 to 60 Hz/Single-phase - Normal Duty