39
4.3.
Protection relay targets
The operation of the relay can be monitored by means of three different HMI
targets:
*
Three target LEDs with fixed functionality:
*
Ready
*
Pickup/Alarm
*
Trip
*
Eight programmable target LEDs
*
Text message on the display
The protection functions are not affected by fault targets.
4.3.1.
Target LEDs
When a protection element picks up or generates an alarm, the yellow target LED is
lit.
When a protection element trips, the yellow target LED remains lit and the red target
LED is lit.
When a picked up protection element is blocked, the yellow target LED starts to
flash. The yellow target LED is also lit to indicate an alarm from a protection
element.
4.3.1.1.
Green target LED
A040264
Fig. 4.3.1.1.-1
Green target LED
Two different functions are embedded in the green target LED: power on and
internal relay fault (IRF).
*
Target off:
The auxiliary voltage is not connected.
*
Lit target:
The relay is in operation. However, a less severe fault (warning) may have
occurred. Refer to Section 4.3.2.3. Self-supervision.
*
Flashing target:
An internal relay fault requiring repair by an authorized service supplier has
occurred. Refer to Section 4.3.2.3. Self-supervision.
Feeder Protection Relay
Operator's Manual - ANSI Version
REF 610
REF 610
1MRS755539
