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When a protection element trips, the text
TRIP
appears on the display along with
the name of the function. Additionally, the name of the energizing input(s) which
caused the fault are displayed (except for the thermal protection and phase
discontinuity protection). The red target is lit.
TRIP
50P-1 la/lb
A070075
Fig. 4.3.2.1.-2
Trip target
In case of an alarm from the thermal overload protection, the text
ALARM
appears on
the display along with the function symbol and the yellow target LED is lit.
ALARM
49
A040274
Fig. 4.3.2.1.-3
Alarm target
If the auto-reclose function has generated the definite trip alarm signal, the text
DEF. TRIP ALARM
will appear on the display to indicate that the CB has been left
in the open position and that no more auto-reclosures are being generated.
If a pickup or trip target for the element that initiated an ongoing auto-reclose shot is
cleared, the text
Shot Due
appears on the display to indicate that a shot is ongoing
and that the CB will be closed after expiration of the dead time.
In case the CB reclosing failed or it is disabled, this is indicated on the display with
the text
RECLOSING FAILED
.
If the auto-reclose function has generated the lockout signal, the text
LOCKOUT
will
appear on the display to indicate that the whole auto-reclose function is temporarily
disabled.
79
DEF. TRIP ALARM
A040276
Fig. 4.3.2.1.-4
Definite Trip-alarm target
42
REF 610
REF 610
Feeder Protection Relay
Operator's Manual - ANSI Version
1MRS755539