YASKAWA iQpump Series Programming Manual page 110

L8-06 Input Phase Loss Detection Level
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Setting Range: 0.0 to 25.0% of Drives O V Trip point
Factory Default: kVA Dependent
The iQpump drive checks for a lost input phase by monitoring the DC Bus voltage ripple. After an initial delay of approximately 12
seconds, the iQpump drive will sample the DC BUS voltage every 1.28 seconds to determine the minimum and maximum voltage
readings. The difference between the minimum and maximum voltage is averaged over ten consecutive scans. If this "averaged" value is
greater than the trip level as determined by L8-06 (L8-06 x 400 for 200 volt class Drives; L8-06 x 800 for 400 volt class Drives) the
iQpump drive shuts down and displays "PF," an input phase loss fault.
Figure 1.93
L8-07 Output Phase Loss Protection
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Setting
0 Disabled
1 Enabled (factory default)
The output phase loss detection circuit monitors the DCCT and activates when one or more of the output phases are lost. The detection
circuit calculates the RMS current value (I
decreases to or below the detection level for 10 seconds, an output phase loss (LF) fault occurs and the motor coasts to a stop
L8-09 Output Ground Fault Detection Selection
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Setting
0 Disabled
1 Enabled (factory default)
The iQpump drive has a ground fault detection circuit that activates when the current to ground exceeds 50% of the Drive's rated output
current. The current to ground is determined by comparing the measured current on each of the output phases. If the current to ground is
determined to be above 50% of the Drive's rated output current the digital operator will display a GF and the iQpump drive will coast to
stop.
L8-10 Heatsink Cooling Fan Operation Selection
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Setting
0 Fan On-Run Mode (factory default)
1 Fan Always On
Refer to L8-11 description.
110
Phase Loss
Fault Contact Fault Signal
Input Phase Loss
DC Bus
Voltage
Figure 98 Input Phase Loss Detection Diagram
<0033>
) for each of the phases and compares it with an internal output detection level. If I
RMS
10 seconds
Description
Description
Description
Closed
t
Open
L8-06
t
Time
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
RMS