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10
Wiring
Main Circuit Input/Output
•Phase rotation of input terminals L1 (R), L2 (S), L3 (T) is available
in either direction, clockwise and counterclockwise.
•When Inverter output terminals T1 (U), T2 (V), and T3 (W) are
connected to motor terminals T1 (U), T2 (V), and T3 (W), respec-
tively, motor rotates counterclockwise, viewed from opposite
drive end, upon forward operation command. To reverse the rota-
tion interchange any two of motor leads.
•Never connect AC main circuit power supply to output terminals
T1 (U), T2 (V), and T3 (W).
•Care should be taken to prevent contact of wiring leads with the
3G3XV cabinet, or a short-circuit may result.
•Never connect the power factor correction capacitor or noise filter
to 3G3XV output.
•Never open or close contactors in the output circuit unless
Inverter is properly sized.
Caution The withstand voltage between the motor’s phases is insuffi-
cient.
When the motor is connected to the Inverter’s output, a surge is
generated between the Inverter’s switching and the motor’s coil.
Normally the maximum surge voltage is three times the Inverter’s
input power supply voltage (i.e., 600 V for 200-V class, and
1,200 V for 400-V class). Be sure to use a motor with a withstand
voltage between the motor’s phases that is greater than the maxi-
mum surge voltage. In particular, when using a 400-V-class
Inverter, use a special motor for Inverters.
Wiring Section 1-4
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