Toshiba VF-PS1 Instruction Manual page 89

Setting of motor electronic thermal protection level 1
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]
Setting the motor overload starting level
2) Inverter overload characteristics
Set to protect the inverter unit. Cannot be turned off by parameter setting.
The inverter has two overload detecting functions, which can be switched from one to another using parameter
 (temperature detection).
[Parameter setting]
Title
Temperature detection

If the inverter overload trip function () is activated frequently, this can be improved by adjusting the stall
operation level  downward or increasing the acceleration time  or deceleration time .
= (Standard)
Protection is given uniformly regardless of ambient temperature, as shown by the 120%-60 sec overload curve in
the figure below.
Inverter overload
time [s]
60
0

 ×1.0
 ×0.6
0
=Hz
Function
:Standard (120%-60 sec.)
: Estimation of temperature
110% 150%
Inverter overload protection characteristics
E-23
Output frequency [Hz]
Adjustment range
Monitored output current [%]
100%: Inverter rated output current
E6581386
5
Default setting
