ABB MD21 - Autorestart; Auto Restart Function Parameters; Standard Mode

56 M OTO R C O NT R O L A N D P R O T E C T I O N U N I T M1 0 X U SE R G U I D E
Autorestart
After a sudden voltage dip , M102 may restart the
motor in 4 different ways depending on the type
and duration of the dip(s) through two setting
modes, i.e. standard mode and enhanced mode.
Function
Setting range 0=Disabled 1=Enabled
Default value Disabled
Step value 1
Function mode
Setting range 0=standard 1=enhanced
Default value 0
Step value 1
Maximum autoreclose time
Setting range 0-5000msec
Default value 200msec
Step value 100msec
Maximum powerdown time
Setting range 0-1200sec
Default value 5sec
Step value 0.1sec
Staggered start delay
Setting range 0-1200sec
Default value 5sec
Step value 0.1sec
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Voltage dip trigger level and reset
level correspond to the settings of un-
dervoltage trip level and reset level .
Standard mode
Under standard mode, the reaction of the auto
restart function depends on the length of the volt-
age dip. Three scenarios (cases) are considered,
Case 1: Voltage dip< autoreclose time.
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44 Autorestart (Voltage dip< autoreclose time)