Overspeed Protection (Pr. 374) - Mitsubishi Electric FR-D720-0.2K-G Instruction Manual

Operation setting at fault occurrence

4.13.4 Overspeed protection (Pr. 374)

The drive unit outputs can be shut off in case of overspeed.
Parameter
Number
374 Overspeed detection level
The above parameters can be set when Pr. 160 Extended function display selection = "0." (Refer to page 161.)

The value left of the slash is for the 2.2K drive unit or lower. The one right of the slash is for the 3.7K drive unit.

If a value exceeding the upper speed limit of the motor is set, the actual operation will be limited at the maximum rotation speed. The setting range is for
the S-PM motor. The maximum setting value differs depending on the number of poles of the applied motor.
146
Name Initial Value
3450r/min
Motor speed
Pr. 374
ALM
Setting Range
If the motor speed exceeds the speed
0 to 12000r/min /
set in Pr. 374, overspeed (E.OS) occurs,
0 to 8000r/min 
and the drive unit outputs are stopped.
Coasts to stop
Time
ON
E.OS
Description