2.8 L: Protection Functions
222
YASKAWA ELECTRIC
TOEP C710687 03B FSDrive-MV1000 Parameter Guide
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L8-67: Output Voltage Unbalance Detection Time
Sets the time before output voltage unbalance is detected, in 0.001 s units. If the state in which the zero-phase voltage
detection value exceeds the level set for L8-66 continues for the time set for L8-67 or longer, output voltage unbalance
(VUB) is detected.
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L8-86: Transformer Overheat Alarm (TMA) Operation Selection
Parameter L8-86 sets the action the drive should take when a transformer overheat pre-alarm (TMA) is detected.
Setting 0: Ramp to stop
The drive stops the motor using the deceleration time 1 set in parameter C1-02.
Setting 1: Coast to stop
The drive output is switched off and the motor coasts to stop.
Setting 2: Fast Stop
The drive stops the motor using the Fast Stop time set in parameter C1-09.
Setting 3: Alarm only
The operation is continued.
Note:
TMA is detected as a fault when setting 0 to 2 is selected. It is detected as an alarm when setting 3 or 4 is selected.
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L8-87: Transformer Overheat Alarm (TMA) Level
Sets the trigger temperature for the transformer overheat alarm (TMA) function in
°
C units.
Note:
When L8-86 is set to 3 and the detected transformer temperature has reached the setting for this parameter, a transformer
overheat alarm (TMA) is detected. When L8-86 is set to 0, 1, or 2, a transformer temperature fault (TME1) is detected.
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L8-88: Transformer Overheat Fault (TME) Level
Sets the trigger temperature for the transformer overheat fault (TME) function in
°
C units.
Note:
When the detected transformer temperature has reached the setting for this parameter, a transformer overheat fault (TME) is
detected.
No.
Name
Setting Range
Default
L8-67
Output Voltage Unbalance Detection Time
0.001 to 2.000 s
0.200 s
No.
Name
Setting Range
Default
L8-86
Transformer Overheat Alarm (TMA) Operation
Selection
0 to 3
3
No.
<1> For details on the default settings, refer to
Defaults by Drive Model Selection (o2-04) on page 87
Name
Setting Range
Default
L8-87
Transformer Overheat Alarm (TMA) Level
50 to 160
°
C
Determined by o2-04
No.
<1> For details on the default settings, refer to
Defaults by Drive Model Selection (o2-04) on page 87
Name
Setting Range
Default
L8-88
Transformer Overheat Fault (TME) Level
50 to 160
°
C
Determined by o2-04
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