ABB RELION REF610, Technical Reference Manual

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5.1.1.6. Non-volatile memory
The relay can be configured to store various data in a non-volatile memory, which
retains its data also in case of loss of auxiliary voltage (provided that the battery has
been inserted and is charged). Operation target messages and LEDs, disturbance
recorder data, event codes and recorded data can all be configured to be stored in the
non-volatile memory whereas setting values are always stored in the EEPROM. The
EEPROM does not require battery backup.
5.1.1.7. Self-supervision
The self-supervision system of the relay manages run-time fault situations and
informs the user about an existing fault. There are two types of fault targets: internal
relay fault (IRF) targets and warnings.
When the self-supervision system detects a permanent internal relay fault, which
prevents relay operation, the green target LED (ready) will flash. At the same time,
the IRF contact (also referred to as the IRF relay), which is normally picked up,
drops off and a fault code appears on the LCD. The fault code is numerical and
identifies the fault type.
INTERNAL FAULT
FAULT CODE :30
A040278
Fig. 5.1.1.7.-1 Permanent IRF
In case of a warning, the relay continues to operate with full or reduced functionality
and the green target LED (ready) remains lit as during normal operation. A fault
target message (see Fig. 5.1.1.7.-2), with a possible fault code (see Fig. 5.1.1.7.-3),
appears on the LCD indicating the type of fault. In case of a warning due to an
external fault in the trip circuit detected by the trip-circuit supervision, or due to
continuous light on the light sensor inputs, SO2 is activated (if SGF1/8=1).
WARNING
BATTERY LOW
A040279
Fig. 5.1.1.7.-2 Warning with text message
Feeder Protection Relay
Technical Reference Manual - ANSI Version
REF610 REF610
1MRS755535