Chapter 3 Electrical Wiring｜VP3000
64
3-2 System Wiring Diagram
Supply power according to the rated power
specifications indicated in the manual
There may be a large inrush current during power
on. Refer to Section 3-2-1 NFB to select a
suitable NFB or Section 3-2-1 Fuse Specification
Chart.
Electromagnetic
contactor
Switching the power ON / OFF on the primary
side of the electromagnetic contactor can turn the
drive ON / OFF, but frequent switching may cause
machine failure. Do not switch ON / OFF more
than once an hour. Do not use the
electromagnetic contactor as the power switch for
the drive; doing so shortens the life of the drive.
AC reactor
(Input terminal)
When the main power capacity is > 500 kVA, or
when it switches into the phase capacitor, the
instantaneous peak voltage and current
generated may destroy the internal circuit of the
drive.
It is recommended that you install an input side
AC reactor in the drive. This also improves the
power factor and reduces power harmonics. The
wiring distance should be within 10 m. Refer to
Section 10-3-2 AC Reactor for details.
Used to reduce radiated interference, especially
in environments with audio devices, and reduce
input and output side interference. The effective
range is AM band to 10 MHz. Refer to Section 10-
3-3 Zero Phase Reactor for details.
Can be used to reduce electromagnetic
interference.
Refer to Section 10-3-4 EMI Filter for details.
AC reactor
(Output
terminal)
The motor cable length affects the size of the
reflected wave on the motor end. It is
recommended that you install an AC output
reactor when the motor wiring length exceeds
20m. Refer to Section 10-3-2 AC Reactor for
details.
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