4.3.1.2.
Yellow target LED
A040266
Fig. 4.3.1.2.-1
Yellow target LED
*
Target off:
No protection element has picked up and there are no thermal alarms.
*
Lit target:
A protection element has picked up or generated an alarm. The pickup and alarm
target can be selected to be either latching or non-latching with the SGF
switches. A non-latching target is automatically cleared when the fault has
disappeared and the protection element has been reset, whereas a latching target
remains lit until manually cleared.
*
Flashing target:
Pickup protection elements have been blocked by an external digital input signal.
The blocking target is non-latching, that is, it disappears with the digital input
signal.
The yellow target LED continues flashing for as long as a protection element
remains blocked. The blocking target disappears with the digital input signal or
when the protection element is no longer picked up.
If a protection element is blocked when other protection elements are picked up, the
target continues flashing. This is because a blocking target has a higher priority than
a pickup target.
4.3.1.3.
Red target LED
A040265
Fig. 4.3.1.3.-1
Red target LED
*
Target off:
No protection element has tripped.
*
Lit target:
A protection element has tripped. The trip target is latching, that is, it remains lit
until manually cleared.
*
Flashing target:
CB Fail element has tripped. The target is latching, that is, it remains flashing
until manually cleared.
40
REF 610
REF 610
Feeder Protection Relay
Operator's Manual - ANSI Version
1MRS755539
