Toshiba TOSVERT VF-AS1 Instruction Manual page 88

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
rated current.
[Example of setting: When the VFAS1-2007PL is running with a 0.4kW motor having 2A rated current]
Key operated
5
[Using a VF motor (motor for use with inverter)]
Setting of electronic thermal protection characteristics selection
Default setting
A VF motor (a motor for use with an inverter) can be used in lower frequency ranges than the general-purpose motor,
but if that frequency is extremely low, the effects of cooling on the motor will deteriorate.
In such a case, set the OL reduction start frequency parameter
(Refer to the figure below.)
As a guide, it is advisable to set this parameter around the default value (VF motor 6Hz).
[Parameter setting]
Title
Note:
Output current reduction factor [%]/[A]
×1.0
×0.6
Note:The motor overload starting level is fixed at 30Hz. If necessary, set
(See the following section.)
LED display
MODE
ENT
ENT ⇔
Overload protection
(protect)
(protect)
× (not protect)
× (not protect)
Function
OL reduction starting frequency
is enabled when = ~ .
0
30Hz
Displays the operation frequency. (Perform during operation stopped.)
(When standard monitor display selection
The first basic parameter "History function (
Press either the key or the
Press the ENTER key to display the parameter setting (Default setting:
%).
Press the key to change the parameter to
(= motor rated current/inverter output rated current x 100
= 2.0/5.0 × 100)
Press the ENTER key to save the changed parameter.
parameter are displayed alternately.
Overload stall
× (not stall)
(stall)
× (not stall)
(stall)
Adjustment range
~ Hz
E-22
so that it fits the motor's
Output frequency [Hz]
to ~ .
Operation
= [Output frequency])
)" is displayed.
key to change the parameter to
according to the characteristics of the motor.
Default setting
E6581301
.
and the