Table 5.1.17.1.-11 E13...E22
Channel Event Description Weighting
factor
Default
value
3 E13 Open CB command activated 1 0
3 E14 Open CB command reset 2 0
3 E15 Close CB command activated 4 0
3 E16 Close CB command reset 8 0
3 E17 CB reclosing failed signal activated 16 1
3 E18 CB reclosing failed signal reset 32 1
3 E19 CB reclosing disabled 64 1
3 E20 CB reclosing disabled reset 128 1
3 E21 AR cancelled 256 1
3 E22 AR cancelled reset 512 1
Default value of event mask 3V156 1008
5.1.18. Self-supervision (IRF) system
The relay is provided with an extensive self-supervision system which continuously
supervises the software and the electronics of the relay. It handles run-time fault
situations and informs the user about an existing fault via a LED on the HMI and a
text message on the LCD. There are two types of fault targets: IRF targets and
warnings.
Internal relay fault
When an internal relay fault preventing relay operation is detected, the relay first
tries to eliminate the fault by restarting. Only after the fault is found to be
permanent, the green target LED (ready) begins to flash and the self-supervision
output contact is activated. All other output contacts are returned to the initial state
and locked for the internal relay fault. Further, a fault target message appears on the
LCD, including a fault code.
IRF targets have the highest priority on the HMI. None of the other HMI targets can
override the IRF target. As long as the green target LED (ready) is flashing, the fault
target cannot be cleared. In case an internal fault disappears, the green target LED
(ready) stops flashing and the relay is returned to the normal service state, but the
fault target message remains on the LCD until manually cleared.
The IRF code indicates the type of internal relay fault. When a fault appears, the
code is to be recorded and stated when ordering service. The fault codes are listed in
the following table:
136
REF610REF610
Feeder Protection Relay
Technical Reference Manual - ANSI Version
1MRS755535
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