Toshiba TOSVERT VF-nC3 Instruction Manual page 64

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 f607
Parameter f607 is used to set the time elapsed before the motor trips under a load of 150% (overload trip
2 ) within a range of 10 to 2400 seconds. 
3) Inverter overload characteristics
Set to protect the inverter itself. The setting of this parameter cannot be turned to off.
When an inverter overload trip (  ) operates, operation can be improved by lowering stall operating level
 , or increasing acceleration time  and deceleration time  .
Inverter overload
time [s]
small/medium
capacity types: 120
large capacity types:
60
0
Note 1: At extremely low speeds of lower than 1 Hz or over 150%, an overload trip (  ) occurs in a short
period of time to protect the inverter.

×1.0

×0.6
0
6Hz
Note) The start level for motor overload reduction is fixed at 6 Hz.
110% 150%
Inverter overload protection characteristic
C-19
E6581595
Output frequency (Hz)
Monitored output current [%]
100%: Inverter rated
t
3
output