HV580L Series Frequency Inverter
150
P9-62
Action judging voltage at
instantaneous power failure
Default
80.0%
Setting Range
60.0%
~
100.0%( standard bus voltage )
Upon instantaneous power failure or sudden voltage dip, the DC bus voltage of the AC drive reduces. This
function enables the AC drive to compensate the DC bus voltage reduction with the load feedback energy by
reducing the output frequency so as to keep the AC drive running continuously.
• If P9-59 = 1, upon instantaneous power failure or sudden voltage dip, the AC drive decelerates. Once the
bus voltage resumes to normal, the AC drive accelerates to the set frequency. If the bus voltage remains
normal for the time exceeding the value set in P9-61, it is considered that the bus voltage resumes to normal.
• If P9-59 = 2, upon instantaneous power failure or sudden voltage dip, the AC drive decelerates to stop.
Figure 6-24 AC drive action diagram upon instantaneous power failure