Panasonic VF0 Series Instruction Manual page 56

RIDE-THROUGH RESTART (Parameter P49)
●
Used to select the restart mode after an instantaneous power failure occurs, according to the
load conditions and system. A wait timer function is built-in.
Data
setting
value
0
1
2
Note 1) This is the min. time for operation at the rated output current.
Note 2) This is the min. time. (This time may be longer if the rated capacity is larger.)
Note 3) The wait time can be set between 0.1 to 100 sec. with parameter P50.
• Data setting value "0"
• Data setting value "1"
• Data setting value "2"
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CAUTION
:
Depending on the ride-through restart function settings, the motor may restart suddenly
after the power is restored.
(Ensure personal safety before restarting.)
Failure to do so could lead to injury.
Inverter operation in regard to instantaneous power failure time
Min. 15ms or Exceeding min. 15ms
less (Note 1)
• The LU trips, and the inverter operates according to the start mode settings.
• "LU" will be displayed, and a fault warning signal will be output.
• Restarts from 0Hz after the wait time has elapsed.
• "LU" will be displayed, but a fault warning signal
Operation
will not be output.
continues
• After the wait time has elapsed, the inverter
restarts at the frequency applied before the
ride-through restart occurred.
• "LU" will be displayed, but a fault warning signal
will not be output.
(This time may be longer depending on the model.)
Even if the power failure time is relatively long (approx. 1 min.), the inverter may
restart after the power is restored. Wait at least four min. (wait time + 2 min.) after
the power is restored before handling the inverter, motor or load facility.
[When voltage drop time is more than 15ms but less than 100ms.]
Power
supply
Output
(No restart) frequency
Output
(0Hz restart)
frequency
(Pickup restart) Output
frequency
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Min. 100ms or less
(Note 1) (Note 2)
Voltage drop time
LU level
0
Operates according to the
LU trip
start mode setting details
0
Wait time
(Parameter P50)
LU trip
0
LU trip
0
Exceeding min. 100ms
(Note 2)
Operation takes place
according to the details
set in the start mode.
Current limit function