121
grid power is down and bus voltage equal to the value of threshold of trip-free,the inverter
will Reduce the operating frequency according to Fb.05,The motor will be in a mode of
power generator,Feedback of electricity will be used to maintain the bus voltage and the
inverter will run under the normal state until The inverter is on electricity again.
Note:properly adjusting the two parameters is a good way to realize the power
switch,and not causing the inverter protection causing production stagnation.
Code
Name
Setting Range
Fb.05
Input phase-failure protection
0
~
1
【
1
】
Fb.06
Output phase-failure protection
0
~
1
【
1
】
0:Disable
1:Enable
Input phase loss protection: select whether to protect the input phase loss.
Output phase loss protection: select whether to protect the output phase loss.
Code
Name
Setting Range
Fb.07
Over-voltage stall protection
0
~
1
【
1
】
Fb.08
Over-voltage stall protection point
110
~
150%
【
220V:120%
】
【
380V:140%
】
Fb.07:
0:Disabled
1:Enabled
Fb.08:
220V model factory value: 120%
380V model factory value: 140%
During deceleration,the motor's decelerating rate may be lower than that of inverter's
output frequency due to the load inertia.At this time,the motor will feed the energy back to
the inverter, resulting in rise of DC bus voltage rise.If no measures taken,the inverter will
trip due to over voltage.