YASKAWA GA800 Series, Technical Reference

Page: 942 / 1016

12.9 L: Protection Functions
942 YASKAWA SIEPC71061737B GA800 Drive Technical Reference
■
L8-07: Output Phase Loss Protection Sel
No.
(Hex.)
Name Description
Default
(Range)
L8-07
(04B3)
Output Phase Loss
Protection Sel
Sets the function to enable and disable output phase loss detection. The drive starts output phase loss
detection when the output current decreases to less than 5% of the drive rated current.
1
(0 - 2)
Note:
The drive can incorrectly start output phase loss detection in these conditions:
• The motor rated current is very small compared to the drive rating.
•
The drive is operating a PM motor with a small load.
0 : Disabled
1 : Fault when one phase is lost
If the drive loses one output phase, it will trigger LF [Output Phase Loss] .
The output turns off and the motor coasts to stop.
2 : Fault when two phases are lost
If the drive loses more than one output phase, it will trigger LF [Output Phase Loss] .
The output turns off and the motor coasts to stop.
■
L8-09: Output Ground Fault Detection
No.
(Hex.)
Name Description
Default
(Range)
L8-09
(04B5)
Output Ground Fault
Detection
Sets the function to enable and disable ground fault protection.
Determined by o2-04
(0, 1)
0 : Disabled
The drive will not detect ground faults.
1 : Enabled
If there is high leakage current or a ground short circuit in one or two output phases, the drive will detect GF [Ground
Fault] .
Note:
If the ground path impedance is low, oC [Overcurrent] , SC [Out Short Circuit or IGBT Fault] , or ov [DC Bus Overvoltage] can stop the
motor.
■
L8-10: Heatsink Fan Operation Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-10
(04B6)
Heatsink Fan Operation
Selection
Sets operation of the heatsink cooling fan.
0
(0 - 2)
0 : During Run, w/ L8-11 Off-Delay
The drive turns on the fan when a Run command is active.
1 : Always On
The fan turns on when you supply power to the drive. When you release the Run command and the delay time set in
L8-11 [HeatsinkCoolingFan Off DelayTime]
is expired, the fan stops. his setting extends the fan lifetime.
2 : On when Drive Temp Reaches L8-64
The fan turns on when the drive detects that the main circuit is overheating.
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV