Toshiba TOSVERT VF-PS1 Instruction Manual page 91

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 VFPS1-5022PM is running with a 2HP motor having 2.7A rated current at 575V]
5
Key operated
MODE
ENT
ENT
[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 standard 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
motor. (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
0
Note: The motor overload starting level is fixed at 30Hz. If necessary, set
or . (See the following section.) Even if the inverter is used with a Toshiba
standard motor, the load may need to be reduced at frequencies of 30Hz and
below in some cases. In such cases, set
reduction starting frequency (
LED display
Displays the operation frequency. (Perform during operation stopped.)
(When standard monitor display selection
The first basic parameter "History function (
Press either the
Press the ENTER key to display the parameter setting (Default setting:
Press the
(= motor rated current/inverter output rated current x 100
Press the ENTER key to save the changed parameter.
⇔
parameter are displayed alternately.
Overload protection
(protect)
(protect)
× (not protect)
× (not protect)
Function
OL reduction starting frequency
is enabled when = ~ .
30Hz
to ,
) according to the motor.
Operation
key or the key to change the parameter to
%).
key to change the parameter to
= 2.0/3.9 × 100)
Overload stall
× (not stall)
(stall)
× (not stall)
(stall)
according to the characteristics of the
Adjustment range
~ Hz
E-22
E6581531
so that it fits the motor's
Output frequency [Hz]
to , ,
, or and set the
= [Output frequency])
)" is displayed.
and the
Default setting
.