Other Functions; Self-Supervision - ABB REF601 Applications Manual

1MDU07212-YN Rev. A
2.4
2.4.1
REF601 / REJ601
Application Manual

Other Functions

Self-Supervision

The IED is provided with an extensive self-supervision system which continuously
supervises the software and the electronics. It handles run-time fault situations and
informs the user about a fault via the LHMI.
At normal condition (no internal fault), the green Ready LED glow and the self-
supervision output contact is closed.
When an internal fault is detected in the IED, the green LED ceases to glow and
the self-supervision contact closes. Also, all other outputs are released.
XK2:
5
BO4
(IRF)
6
Normal condition
or no auxiliary power
Figure 1: Behavior of contact assigned for Unit ready / IRF
Internal fault indications have the highest priority on the LHMI. None of other
LHMI indications can override the internal fault indication. An indication about the
fault is shown as a message on the LHMI.
The internal fault code indicates the type of internal IED fault
Table 2: Internal fault indications and fault codes
Internal fault code
IRF 008
IRF 016
IRF 032
IRF 064
The user can try to eliminate the fault by restarting the IED. If the fault is found to
be permanent, the IED stays in internal fault mode.
REF601/REJ601 overview
XK2:
5
BO4
(IRF)
6
IRF condition
Type of fault
Internal supply voltage check
Power on "EEPROM" check fault
Runtime "EEPROM" check fault
Gain check fault
Section 2
9