Toshiba Tosvert VF-A5 - Electronic Thermal Protection

E6580516
,- ,-,
1_1 ,- • ,- ,- (Protection Parameters)
Electronic thermal protection ©
Related parameters
It: ,'-J,- :I Motor overload protection level
IOL F I OL reduction start-up frequency
IO L I:: I Motor 150% overload time limit
The motor overload protection level It:: 1-J,- :I can be adjusted according to the motor rating and
characteristics.
Motor overload
time[S]
i
Motor overload start-up level
Operating frequency
less than IOL Fl
Operating frequency
higher than IO L Fl
o---~---...,.._--~--
l1:H,- I 1 ·x1.1
I t: H,-
X0.6
Monitored output
current value
I (:,'-1,- : I X1 .5
Output current
i
When operating a motor at low frequencies, the motor's
cooling ability decreases. Therefore, the OL reduction
start-up frequency
IO L F lean be used to lower the
OL operation start-up level.
1:1-1.- I X1.1 ---------------~-------
This should be set according to the motor characteristics.
The
following settings are recommended:
30Hz for a standard motor
6Hz for a
VF motor
By setting
IO L t: I . the time before an OL trip will
occur when the motor is operated at 150% load can be
adjusted between
10 and 2400 seconds.
- 77 -
I t: H,- :I X0.6
IDL FI Output frequency
~