Download VF66B Operating Manual (Induction Motor Vector Control Mode)

Induction motor vector mode
Overload protection setting
Display
Items
Set-up range
(Item selection)
F-03
Overload protection setting
20 to 110
Set-up
resolution
1
Default Unit
data
100
%
Set the reference current value for the overload protection in the rate against the Rated motor currnet (A-04).
Overload protection counter will be initiated when the effective value of the inverter output current exceeds
105% of the reference current and the overload protection (OL) will be activated in the 60 seconds carve when
the output current is 150% as shown in figure below.
ＯＬ protection
Operating time
(sec)
ＯＬ operating time
=2700/(output current(% to reference current) – 105)
400
200
60
105
150
Actual value of output current
(% to reference current (A-04×F-03/100))
％
Overload protection (OL) duration
Note: Overload counter can be monitored from
the console. (It is compared with the
overtorque counter and whichever has a
greater value will be displayed.)
Overload counter starts count when it is in
an overload condition with time and overload
protection will be activated and inverter
will be tripped when it becomes 100%.
OL pre-alarm function can be used so that
signal is output when the count on the
overload counter exceeds given point. For
more information, refer to Chapter3 3.9
<H-area (multi-function output setting
area)> also Chapter4 4.9 <H-area
(multi-function output setting area)>.
Cumulative operation timer setting
Set-up range
(Item selection)
Display
Items
F-04
F-05
Cumulative operation timer(1-Capacitor) 0 to 65535
Cumulative operation timer(2-Fan)
0 to 65535
Set-up
resolution
1
1
Default Unit
data
Note 1
Hr
Note 1
Hr
Note 1: See also table below.
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