50 M OT O R CO N T R O L A N D P R OT E C T I O N U N IT M 10 X US ER G U I D E
Earth fault protection
M10x protects the motor against the earth fault
condition with an additional residual current
transformer.
The function is by default suppressed by
parameters motor startup time and softstarter
ramp up time to avoid nuisance tripping due to
harmonics caused by saturation of the current
transformers. It can be manually switched on
when it is required.
M10x relay is NOT a residual current
protection device. This protection is
neither intended to be used for pre-
emptive isolation supervision nor for
personnel protection against electrical
shock. For these applications ABB
recommends the usage of external
protection devices (PRCDs/RCDs).
Function
Setting range 0=Disabled 1=Enabled 3=Alarm only
Default value Disabled
Step value 1
Earth fault protection is activated during motor startup time
Setting range 0=Disabled 1=Enabled
Default value 0
Step value 1
Alarm level
Setting range 100-3000mA (Earth fault primary = 1A) 500-15000mA (Earth fault
primary = 5A)
Default value 500mA
Step value 100mA
Trip level
Setting range 100-3000mA (Earth fault primary = 1A) 500-15000mA (Earth fault
primary = 5A)
Default value 800mA
Step value 100mA
Trip delay
Setting range 0.1-60.0sec
Default value 10.0sec
Step value 0.1sec
Trip reset mode
Setting range 2=Local 3=Remote 4=Remote and local
Default value 4
Step value 1
—
—
40 Earth fault protection ( I0 = measured earth fault current)
''
To Next Page
Loading...
Need help?
General
