ABB Relion 670 Series RES670, Technical Manual

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Each indication LED on local HMI can be set individually to operate in 6 different
sequences; two as follow type and four as latch type. Two of the latching sequence types
are intended to be used as a protection indication system, either in collecting or restarting
mode, with reset functionality. The other two are intended to be used as signalling system
in collecting mode with acknowledgment functionality.
5.5.2.2 Status LEDs
There are three status LEDs above the LCD in front of the IED: green, yellow and red.
The green LED has a fixed function that presents the healthy status of the IED. The yellow
and red LEDs are user configured. The yellow LED can be used to indicate that a
disturbance report is triggered (steady) or that the IED is in test mode (flashing). The red
LED can be used to indicate a trip command.
Here is a typical configuration of the status LEDs:
• Green LED: unlit > no power; blinking > startup or abnormal situation (IED is not in
service); steady > IED is in service
• Yellow LED: unlit > no attention required; blinking > IED is in Testmode (IED is not
in normal service); steady > at least one of the signals configured to turn the yellow
LED on has been active
• Red LED: unlit > no attention required; blinking > user performs a common write
from PCM600; steady > at least one of the signals configured to turn the red LED on
has been active
The yellow and red status LEDs are configured in the disturbance recorder function,
DRPRDRE, by connecting a pickup or trip signal from the actual function to a BxRBDR
binary input function block using the PCM600, and configuring the setting to
Off , Pickup
or Trip for that particular signal.
5.5.2.3 Indication LEDs
Operating modes
Collecting mode
• LEDs that are used in the collecting mode of operation are accumulated continuously
until the unit is acknowledged manually. This mode is suitable when the LEDs are
used as a simplified alarm system. When all three inputs (red, yellow and green) are
connected to different sources of events for the same function block, collecting mode
shows the highest priority LED color that was activated since the latest
acknowledgment was made. If a number of different indications were made since the
latest acknowledgment, it is not possible to get a clear view of what triggered the
latest event without looking at the sequence of events list. A condition for getting the
1MRK 511 365-UUS A
Section 5
Local Human-Machine-Interface LHMI
Phasor measurement unit RES670 2.1 ANSI 87
Technical manual