Disturbance Recorder Target; Targets For Internal Relay Faults (Irfs) And Warnings - ABB REF 610 Operator's Manual

REF 610
3.3.2.2.
3.3.2.3.
32
Feeder Protection Relay
Operator's Manual - ANSI Version
Fig. 3.3.2.1.-4 Definite Trip-alarm target
Latching and non-latching targets
A latching operation target message will remain on the display until manually
cleared or until replaced by a message of higher priority. However, if the fault is
stable and has not disappeared, the operation target message and the LED(s) will not
be cleared. An operation target generated by a non-latching pickup will
automatically be cleared when the element is reset.
Priority of operation target messages
The messages on the display have a certain priority order. If different types of targets
are activated simultaneously, the message with the highest priority will appear on
the display.
The priority order of the messages:
1. CBFP/Trip from Arc protection
2. CB Reclosing Failed
3. Trip/Definite Trip Alarm
4. Pickup/Alarm/Shot Due/AR Lockout
When several protection elements generate pickups or alarms, the last pickup/alarm
target message will be displayed. When several protection elements trip, the first trip
target message will be displayed until the time, as specified by the NEW TRIP
IND. setting value, has expired. After this, a new trip target message can displace
the old one. A hidden trip target message can be brought forward by pressing

Disturbance recorder target

When the display is in the idle mode, an asterisk "*" indicating that the disturbance
recorder has been triggered and is ready to be unloaded, will be shown in the lower
right-hand corner of the display.

Targets for internal relay faults (IRFs) and warnings

There are two types of fault targets; internal relay fault (IRF) targets and warnings.
Internal relay faults prevent relay operation while less severe faults (called
warnings) allow continued relay operation with full or reduced functionality.
Internal relay fault (IRF)
At permanent internal relay faults, the relay is no longer protecting and has to be sent
for repair at an authorized service supplier. When the self-supervision system
detects a permanent internal relay fault, the green target LED will start to blink and
the text INTERNAL FAULT and a fault code will appear on the display. State the
fault code when sending the relay for service. As long as the green target LED
DEF. TRIP ALARM
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1MRS 755539
.