Hitachi L200 Manual Do Utilizador

“B” Group: Fine Tuning Functions

Configur

ing

Dr

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If the inverter’s output current exceeds a 
preset current level you specify during 
acceleration or constant speed, the overload 
restriction feature automatically reduces the 
output frequency to restrict the overload. 
This feature does not generate an alarm or 
trip event. You can instruct the inverter to 
apply overload restriction only during 
constant speed, thus allowing higher 
currents for acceleration. Or, you may use 
the same threshold for both acceleration and 
constant speed.

When the inverter detects an overload, it 
must decelerate the motor to reduce the 
current until it is less than the threshold. 
You can choose the rate of deceleration that 
the inverter uses to lower the output current. 

Motor 

Current

Output 

frequency

t

t

Restriction area

0

0

B022

B023

B021 Overload restriction 

operation mode

Select the operating mode 
during overload conditions, 
three options, option codes:
00... Disabled
01... Enabled for acceleration 
and constant speed
02... Enabled for constant 
speed only

✘

01

01

—

OL Mode      ON

B022 Overload restriction 

setting

Sets the level for overload 
restriction, between 20% and 
150% of the rated current of 
the inverter, setting resolution 
is 1% of rated current

✘

Rated current x 

1.5

A

OL LVL   002.40A

B023 Deceleration rate at 

overload restriction

Sets the deceleration rate when 
inverter detects overload, range 
is 0.1 to 30.0, resolution is 0.1.

✘

1.0

30.0

sec.

OL Cnst  0001.0s