Toshiba TOSVERT VF-FS1 Instruction Manual page 89

[Using a VF motor (motor for use with inverter)]
Setting of electronic thermal protection characteristics selection 
Setting value Overload protection




VF motors (motors designed for use with inverters) can be used in frequency ranges lower than those
for standard motors, but their cooling efficiency decreases at frequencies below 6Hz.
Setting of motor electronic thermal protection level 1 (Same as )
If the capacity of the motor is smaller than the capacity of the inverter, or the rated current of the motor
is smaller than the rated current of the inverter, adjust the electronic thermal protection level 1  so
that it fits the motor's rated current.
* If the indications are in percentages (%), then 100% equals the inverter's rated output current (A).
Output current reduction factor [%] / [A]
2) Motor 150%-overload time limit 
Parameter  is used to set the time elapsed before the motor trips under a load of 150% (overload trip
) within a range of 10 to 2400 seconds.
3) Inverter over load characteristics
Set to protect the inverter unit. Cannot be changed or turned off by parameter setting.
To prevent the inverter overload trip function () from being activated too easily, lower the stall
prevention level () or increase the acceleration time () or deceleration time ().
Overload stall
×
× ×
×
: valid, × : invalid
×1.0
×0.6
0
6Hz
Setting the motor overload starting level
E-27
E6581381
Output frequency (Hz)
5