E6581531
E-23
5
Setting of motor electronic thermal protection level 1
VJT
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
VJT
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].
VJT
×0.6
VJT
×1.0
H
=
Hz
Output frequency [Hz]
Output current reduction factor [%]/[A]
0
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
H
(temperature detection).
[Parameter setting]
Title
Function
Adjustment range
Default setting
H
Temperature detection
:Standard (120%-60 sec.)
:
Estimation of temperature
If the inverter overload trip function (
QN
) is activated frequently, this can be improved by adjusting the stall
operation level
H
downward or increasing the acceleration time
CEE
or deceleration time
FGE
.
H
=
(Standard)
Protection is given uniformly regardless of ambient temperature, as shown by the 120%-60 sec overload curve in
the figure below.
60
100%: Inverter rated output current
time
[s]
Inverter overload
Monitored output current [%]
0
110%
150%
Inverter overload protection characteristics
