Self-Supervision; Configuration - ABB REJ 527 Technical Reference Manual

REJ 527
4.1.1.8.
4.1.2.
12
Technical Reference Manual

Self-supervision

The self-supervision system of the relay handles run-time fault situations and
informs the user about an existing fault. When the self-supervision system detects a
permanent internal relay fault, the ready indication LED starts blinking. At the same
time the IRF relay that is normally picked up drops off and a fault code appears on
the display. During an internal fault all other output contacts are blocked.
READY START TRIP
INTERNAL FAULT
FAULT CODE : 56
C
E
Fig. 4.1.1.8.-1 Internal fault
The fault code is a number that identifies the fault type. (For fault codes, refer to
section "Self-supervision, IRF" in "Operator's Manual".) Fault codes can indicate:
• No response on output contact test.
• Faulty program memory, work memory or parameter memory.
• Internal reference voltage error.

Configuration

The figure below illustrates how the start, trip and binary input signals can be
configured so that the required protection functions are obtained.
BI
X2.1
17 18
Uo
Uob>
Io 5
SGB1
Blocking of stage Uob>
Io>
6
SGB1
Blocking of stage Io>
Io>>
7
SGB1
Blocking of stage Io>>
1
SGB1
INDICATORS RESET
2
SGB1
RELAYS RESET
3
SGB1
MEMORIZED VALUES RESET
SGF1...SGF5
Fig. 4.1.2.-1 Signal diagram of the directional earth-fault relay
The functions of the blocking and start signals are selected with the switches of
switchgroups SGF, SGB and SGR, found in the menu group "Settings" of the
protection relay. The functions of these switches are explained in detail in the
corresponding SG_ -tables.
IRF
SO2
13 14 15
10 11 12 7
+
IRF
SGR1 4
START
SGR2
4
TRIP
SGR3 4
START
SGR4 4
TRIP
SGR5
4
START
SGR6
4
TRIP
I/O
ABB Substation Automation
Products and Systems
SO1 PO2
PO1
5 6
8 9 3 4
+ +
3 2 1
3 2 1
3 2 1
3 2 1
3 2 1
3 2 1
1MRS750616-MUM