ABB M10 Series User Manual

46 M O TO 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
Phase failure protection
M10x protects the motor against phase current
loss condition. Phase failure protection function
uses I
Lmin
/I
Lmax
(the ratio of lowest I
Lmin
and highest
measured phase value I
Lmax
) as the criterion.
Function is suppressed by parameters Motor
startup time, number of phases and Softstart
ramp time.
Function
Setting range 0=Disabled 1=Enabled 3=Alarm only
Default value Disabled
Step value 1
Trip delay
Setting range 0-60sec
Default value 10sec
Step value 1s
Alarm level
Setting range 10-90%
Default value 80%
Step value 1%
Trip level
Setting range 5-90%
Default value 70%
Step value 1%
Trip reset mode
Setting range 2=Local 3=Remote 4=Remote and local
Default value 4
Step value 1
—

—
36 Phase failure protection
I
Lmin
/I
Lmax
is compared against the phase failure
alarm level. When I
Lmin
/I
Lmax
decreases below the
Alarm level, a “Phase failure alarm” alarm is
issued.
I
Lmin
/I
Lmax
is compared against the phase failure
trip level. When I
Lmin
/I
Lmax
remains below the trip
level at a time longer the trip delay, a “Phase
failure trip” alarm is issued and the contactor
tripped.
''

ABB M10 Series Specifications

General

Brand	ABB
Model	M10 Series
Category	Controller
Language	English