Non-Volatile Memory; Self-Supervision - ABB REU 610 Technical Reference Manual

1MRS755769
5 . 1. 1. 6.
5 . 1. 1. 7 .
Voltage Relay
Technical Reference Manual
N on - v olati le m em or y
The relay can be configured to store various data in a non- volatile memory,
which retains its data also in case of loss of aux iliary voltage ( provided that
the battery has been inserted and is charged) . Operation indication messages
and L E D s, disturbance recorder data, event codes and recorded data can all
be configured to be stored in the non- volatile memory whereas setting values
and trip counters are always stored in the E E PR OM . The E E PR OM
require battery backup.
S elf - s u p er v i s i on
The self- supervision system of the relay manages run- time fault situations
and informs the user about an ex isting fault. There are two types of fault
indications; internal relay fault ( IR F ) indications and warnings. Internal relay
faults prevent relay operation. W arnings are less severe faults and continued
relay operation with full or reduced functionality is allowed.
I n ter n al r elay f au lt ( I RF )
W hen the self- supervision system detects a permanent internal relay fault, the
green indicator L E D starts to flash. At the same time, the IR F contact ( also
referred to as the IR F relay) , which is normally picked up, drops off. The tex t
INTERNAL FAULT and a fault code appear on the display.
INTERNAL FAULT
FAULT CODE :30
Fig. 5 .1.1.7 .-1 P ermanent I R F
W ar n i n g
In case of a less severe fault ( warning) , the relay continues to operate ex cept
for those protection functions possibly affected by the fault. At this type of
fault, the green indicator L E D remains lit as during normal operation, but the
tex t WARNING with a fault code or a tex t message indicating the fault type
appears on the L CD . In case of a warning due to an ex ternal fault in the trip
circuit detected by the trip- circuit supervision, S O2 is activated ( if S GF 1/
8 = 1) .
REU 610
does not
A 040278
17