73
5.3.7.
Area F (protection function/traceback setting area)
In the area F, set the parameters related to various protection functions and traceback functions.
■
F-00
Overload protection setting
Display Contents
Setting range (Selecting item)
Initialized
data
Unit
Write
during
operation
F-00
Overload protection setting
20 to 110
100
%
○
Overload protection setting: F-00
Set a reference current value of overload protection as a ratio to the rated AC current of the converter unit.
When an effective value of converter output current exceeds 105 % of this reference current, this is considered
as an overload situation, and the overload protection counter starts. As shown in the figure, an overload
protection (OL) will be activated according to the 150 % - 60 sec characteristic curve. Normally, do not change
the initial value.
OL protection
operation time
(sec)
Output current effective value
(percentage of reference current)
105
150
60
200
400
OL operation time
= 2700 / (output current (percentage of
reference current) - 105)
（
%
）
Overload protection (OL) operation time
* Caution
The overload protection counter can
be monitored via the console.
The overload counter performs count
ing over time in the overload situa
tion. When it reaches 100 %, the ov
erload protection is activated, cau
sing the converter to stop for prot
ection.
oL pre-alarm function
●
You can use an oL pre-alarm function to output signals when the overload counter exceeds a specified point. For details,
refer to {5.3.4. Area c}.
