Shihlin electric SC3 Series User Manual

Protection parameter group 06
PARAMETER DESCRIPTION 111
5.7.2 Current stalling protection
 In order to avoid the alarm and stop of the inverter due to overcurrent and overvoltage, the output current is
monitored to automatically change the output frequency. It can realize stall prevention during acceleration and
deceleration process or during electric regeneration, and make high response current limit valid.
Parameter
Name
Default
Setting Range
Content
06-01
P.22
Electronic thermal
relay capacity
150.0%
0～250.0%
---
06-02
P.23
Stall prevention
operation level
99999
0～200.0%
---
99999
Stall prevention operation level is the setting value of
06-01(P.22).
06-03
P.66
Stall prevention
operation level
correction factor
50.00Hz
0～650.00Hz
50Hz system（when 00-24(P.189)=1）
60.00Hz
60Hz system（when 00-24(P.189)=0）
Current stalling protection

When Heavy Duty and motor starts or target frequency changes (increases), the rotating speed of motor often
cannot keep up with the speed of output frequency change. When the rotation speed of motor is lower than output
frequency, output current will increase to enhance output torque. However, if the difference between output
frequency and motor speed is too large, motor torque will be reduced, which is called “stall”.
06-01
P.22
output
frequency
level lower area
100%
Output current
percentage
06-03P.66
(full load
current)
Formula for stall prevention level:
Level percentage=A+B×
06-01(P.22)-A
06-01(P.22)-B
×
06-02(P.23)-100
B=
100
400
A=
Output frequency
(06-23(P.66))x(06-01(P.22))
(06-23(P.66))x(06-01(P.22))
Setting

Shihlin electric SC3 Series Specifications

General

Brand	Shihlin electric
Model	SC3 Series
Category	Inverter
Language	English