2.14USER INTERFACE 2.14.1 LED TARGETS
There are 6 LED Targets in the front of the relay. The first one is green (‘READY’ -relay in service-) and cannot be
configured; the second one is red and fixed for trip, while the other 4 can be configured by the userin OPTION1 and
OPTION2 models. The default configuration of the LEDs is shown in the following figure.
Figure 2–5: MIFII LEDS DEFAULT CONFIGURATION
It is possible to configure the color of the 4 configurable LEDs between red and green using the keypad of the front panel of
the relay (for details, refer to Chapter 8).
The indication of each LED is as follows:
READY: The relay is powered up, its power supply is receiving Vdc or Vac, and all the internal circuits are
working properly. The relay status setting is set as “RDY” (ready) and at least one of the protection
functions is enabled. If the LED is off with the above-mentioned conditions, this indicates a loss of
auxiliary supply voltage or an internal HW/SW critical failure condition.
TRIP: The relay has issued a trip, activating the corresponding tripping output contact.
PHASE: Indicates that the trip has been issued by one of the Phase Overcurrent Elements (51P, 50P1,
50P2).
GROUND: Indicates that the trip has been issued by one of the Ground Overcurrent Elements (51G, 50G1,
50G2).
INST: Indicates that the trip has been issued by one of the Instantaneous Elements, either phase or
ground elements (50P1, 50P2, 50G1, 50G2).
PICKUP: Indicates that at least one of the protective elements has picked up.
LEDs associated to tripping functions are latched and once they have been turned on, they remain on until the ESC/RESET
button is pressed for more than 3 seconds (RESET) providing that the trip condition has disappeared. The LED associated
to function pickup is self-reset type, and stays on while the pickup condition (current above setting) exists.
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