Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 118)

The VS-626M5 PC NC Maintenance Manual
4-97
Installation of AC Reactor
Since the VS-656MR5 performs power regeneration, make sure to install
an AC reactor corresponding to converter capacity. Installation of an AC
reactor is effective for power factor improvement on the power supply side.
Installation of Surge Suppressor
For inductive loads (magnetic contactors, magnetic relays, magnetic
valves, solenoids, magnetic brakes, etc.) connected near the inverter, use a
surge suppressor simultaneously.
Prohibition of Installation of Phase Advancing Capacitor
Do not connect a phase advancing capacitor or surge suppressor to the
main circuit power supply input side (R/L1, S/L2, T/L3). It may become
overheated and damaged by high harmonic components of the inverter.
Also, the inverter may malfunction due to an overcurrent.
Using Input Noise Filters
Noise filters can reduce a high harmonics noise leak from the drive unit to
the power line. Use the correct noise filter specified for inverter use as
indicated in the examples below.
Figure 4.10: Using Input Noise Filter (Example 1)
MCCB
Use an exclusive noise filter
specified for the inverter.
Power
Supply
MCCB
M
Other Control Device
`
Noise
Filter VS-
656MR5 VS-
626M5
L