Overload Restriction/Overload Advance Notice - Hyundai hiRUN N300 Series Instruction Manual

N300 INSTRUCTION MANUAL

Overload restriction/Overload advance notice

(1) Overload restriction
The Inverter monitors the motor current on acceleration and
constant speed, when the inverter reaches the overload restriction
level, the Inverter will reduce the output frequency automatically to
restrict the overload.
This function prevents an over-current trip by inertia during
acceleration or radical changes in load at constant speed.
Two kinds of overload restriction function are set with b021, b022,
b023 and b024, b025, b026. To change b021, b022, b023, and
b024, b025, b026, assign 39(OLR) to an intelligent input terminal.
The current value this function operates at is set in overload restriction
level. The overload restriction constant is the time to decelerate to 0Hz
from max frequency. b021, b022, b023 and b024, b025, b026 is
changed with OLR. As this function operates, the acceleration time is longer than setting time.
If the overload restriction constant is set too short, in spite of accelerating, an over-voltage trip is caused
with regenerative enegy from the motor on automatic deceleration by this function. When this function
operates in the midst of accelerating, the frequency will not reach the goal frequency, the Inverter will
adjust in the following way.
Set item
Overload restriction
Selection
Overload
restriction Level.
Overload restriction
Constant.
(Note 1) Increase speed mode at the time regenating
Overload restriction level
Output frequency
Maximum frequency
A004/A204/A304
Inverter output frequency
Make acceleration time longer.
Raise torque boost.
Raise overload restriction level.
Function code
b021/b024
Rated current x 0.5 to
b022/b025
Rated current x 2.0
b023/b026 0.1 to 30.0
b023/b026
Chapter 4 Explanation of function
Data
00 Invalid
Acceleration/valid on constant speed.
01
Valid on constant speed.
02
Acceleration/valid on constant speed. (Note1)
03
Units :A
Current value overload restriction operates.
Units :second
Deceleration time when overload restriction
Operates.
Deceleration set with overload restrion constant
Relation code
b021:Overload restriction selection
b022:Overload restriction level
b023:Overload restriction constant
b024:Overload restriction 2 selection
b025:Overload restriction level 2
b026:Overload restriction constant 2
C001-C008:Intelligent input
C021-C025:Intelligent output
C026:Alarm relay output setting
C040:Overload advance notice
signal output mode
C041:Overload notices level
C111:Overload notices level2
Description
Goal frequency
F001