Fuling Inverter DZB200 Series User Manual page 37

DZB Series
Func tio n
Name
Cod e
～
20.0% 120.0%
Motor Overload
F5.01
(mo tor rate d current)
Protec tion Current
100%
Time
70%
1 minute
140% 200%
Fig.6-21 Motor Overload Protection Current
The value can be determined by following equation:
Motor overload protection current = (maximum cur rent/rated current) 100%
It is mainly applied to the cases that big inverter dri ves small motor, re quiring to correctl y set up this
function to protect the motor.
Func tio n
Name
Cod e
～
Power-down Frequency 70.0 110.0%(sta ndard b us
F5.0 2
Drop Point v oltage)
Instant power-down
～
F5.03 0.00Hz F0.04
Frequency drop ra te
If the instant power-down drop rate is set to be 0, the instant power-down restart function is invalid.
Instant power-down frequency drop point: it is indicting when the bus voltage, after the power network
is down and drops to the instant power-down frequency drop point, the inverter starts to decrease the
operation frequency based on the instant power-down frequency drop rate, enabling the motor to generate
electricity which is fed back to keep the bus voltage, and thus ensuring the inverter is operating normally
till inverter power is on again.
Important: Adjusting these two parameters properly can magnificently achieve the power network
switching instead of causing inverter protection and thus causing production shutdown.
- 67-
Chapter 6 Parameter Description
Default
Setting Range
Value
10 0.0%
Motor Overload Protection Current
Current
×
Default
Setting Range
Value
80 .0%
0.00Hz
DZB Series
Function
N ame
Code
：
0 pr ohibit
Over-voltage
F5.04
Stall Protection
：
1 allow
～
110 150%(380V)
Over-voltage Stall
F5.0 5
Protection Voltage
～
110 150%(220V)
During the inverter deceleration, the load inertia may cause the actual motor speed drop rate lower than
the output frequency drop rate, and thereby the motor generates electricity and fe eds it back to the inverter,
causing the inverter bus voltage going up a nd even bus over-voltage breakdown which then can cause
inverter tripping if no provision is made.
Over-voltage stall protection function is to detect the bus voltage and compare it with the stall over-
voltage point defined by F5.05 (relative to t he standard bus voltage). If it exceeds the over-voltage stall
point, inverter output frequency stop going down, and when the next bus voltage detected is lower than
the over-voltage stall poi nt, the inverter continues to decelerate,as shown by following figure:
Bus voltage
Stall Over-v oltage point
O ut p u t f requ e n c y
Fig.6-22 O ver-voltage Stall F unction
Function
N ame
Code
～
F5.06 Auto limit current level 100 200%
Limit current fr equenc y
～
F5.0 7 0.0 0 5 0.00 Hz /s
drop rate
When inverter is running, the actual climbing rate of motor speed is lower than climbing rate of output
freque ncy because load i s too big. If you don抰 take any action, it will cause over current fault in
acceleration then inverter will trip.
Over-current stall protection function is to detect output current and compare it with the current limit
defined by F5.06. If it exceeds the current limit, output frequency drop down according to F5.07. When it
show that output current is lower than limit current, inverter w ill remain normal operation.
- 68-
Chapter 6 Parameter Description
Default
Setting Range
Value
0
120%
115%
Time t
Time t
Default
Setting Range
Value
200%
0.00Hz /s
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