10 s
etc.
time
10 s
10 s
10 s
10 s
10 s
10 s
f
ref
× (L8-19)
f
ref
× (L8-19)
2
f
ref
× (L8-19)
4
f
ref
× (L8-19)
3
f
ref
Output frequency
Reset oH
Alarm
Reset oH
Alarm
Digital output (4D)
oH
Alarm
oH
Alarm
oH
Alarm
oH
Alarm
oH alarm number
Figure 5.102 Output Frequency Reduction During Overheat Alarm
n
L8-07: Output Phase Loss Protection Selection
Enables or disables the output phase loss detection.
Note:
1.
Output phase loss detection can mistakenly be triggered if the motor rated current is very small compared to the drive rating. Disable
this parameter in such cases.
2.
Output phase loss detection is not possible when the drive is running a PM motor with light load.
No.
Name
Setting Range
Default
L8-07
Output Phase Loss Protection Selection
0 to 2
1
Setting 0: Disabled
Setting 1: Fault when One Phase Is Lost
An output phase loss fault (LF) is triggered when the output current for any phase U, V, or W drops to 5% or less of the drive
rated current.
When using a PM motor, this is applicable when the output current is 30% or higher of the drive rated current.
When using an IM motor, this is applicable when the output current is 5% or higher of the drive rated current.
Setting 2: Fault when Two Phases Are Lost
An output phase loss fault (LF) is triggered when the output current for phases U, V, and W all drop to 5% or less of the drive
rated current.
The output shuts off and the motor coasts to stop.
n
L8-09: Output Ground Fault Detection Selection
Enables or disables the output ground fault detection.
No.
Name
Setting Range
Default
L8-09
Output Ground Fault Detection Selection
0, 1
1
Setting 0: Disabled
Ground faults are not detected.
Setting 1: Enabled
A ground fault (GF) is triggered when high leakage current or a ground short circuit occurs in one or two output phases.
n
L8-10: Heatsink Cooling Fan Operation Selection
Selects the heatsink cooling fan operation.
5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
329
5
Parameter Details
Summary of Contents for U1000 iQpump Drive
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