YASKAWA CIMR-ZU A Series Programming Manual page 121

L8 Input P ase Loss Detection Le el
Sets the Input Phase Loss Detection (PF) Level.
Triggers PF fault when there is an imbalance larger than the value set to L8-06 in the drive input power voltage.
Detection Level = 100% = Voltage Class ×
No
L8-06
L8 7 Output P ase Loss Protection Selection
Enables or disables the output phase loss detection.
1. Output phase loss detection can mistakenly be triggered if the motor rated current is very small compared to the drive rating. Disable
Note:
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
L8-07
Settin Disabled
Settin 1 Fault en One P ase 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.
Settin 2 Fault en
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.
L8 Output Ground Fault Detection Selection
Enables or disables the output ground fault detection.
No
L8-09
Settin Disabled
Ground faults are not detected.
Settin 1 Enabled
A ground fault (GF) is triggered when high leakage current or a ground short circuit occurs in one or two output phases.
L8 1 eatsin Coolin Fan Operation Selection
Selects the heatsink cooling fan operation.
No
L8-10
Settin un it imer
The fan is switched on when a Run command is active and switched off with the delay set to parameter L8-11 after releasing
the Run command. This setting extends the fan lifetime.
Settin 1 un Al ays
The fan runs when power is supplied to the drive.
L8 11 eatsin Coolin Fan O Delay ime
Sets the cooling fan switch off-delay time if parameter L8-10 is set to 0.
Name
Input Phase Loss Detection Level
Name
Output Phase Loss Protection Selection
o P ases Are Lost
Name
Output Ground Fault Detection Selection
Name
Heatsink Cooling Fan Operation Selection
1 8 L Protection Functions
Settin an e
Determined by
0.0 to 50.0%
Settin an e
0 to 2
Settin an e
Determined by
0, 1
Settin an e
0, 1
De ault
o2-04
De ault
1
De ault
o2-04
1
De ault
0
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