Woodward highprotec MRI4, User Manual

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Recorders
Content of a Fault Record
A fault record comprises information about:
Date/Time Date and Time of the Fault
FaultNr The number of the fault will be incremented with each fault (General Alarm or
»P
ROT
.P
ICKUP
«)
Grid Fault No. This counter will be incremented by each General Pickup (Exception AR: this applies
only to devices that offer auto reclosing).
Active Set The active parameter set
Time to trip The time between pickup and trip. Please note: No time to trip will be shown if the first
pickup and the first trip are issued by different protection modules.
Alarm Name of the module that picked up first.
Trip Name of the module that tripped first.
The information that will be displayed depends on which protection module has tripped.
That means e.g. that the thresholds are shown. In case that the trip was initiated by the
MotorStart (applies to motor protection relays) protection module, additional information
will be displayed.
Adaptive Set In case that adaptive sets are used, the number of the active set will be displayed.
Fault type In case of overcurrent trips, the fault type will be evaluated based on the energized
phases.
Alarm Phase A Alarm Phase B Alarm Phase C Fault Type
x L1G
x L2G
x L3G
x x L1B
x x L2L3
x x L1L3
x x x L1L2L3
Direction In case that a direction has been detected, the evaluated direction will be displayed
(this applies to directional phase and ground overcurrent relays only).
Measured Values Various measuring values at the time of tripping (or delayed depending on parameter
setting) will be displayed.
178 MRI4 DOK-HB-MRI4-2E