Section 17 Basic IED functions
17.1 Self supervision with internal event list
17.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Internal error signal INTERRSIG - -
Internal event list SELFSUPEVLST - -
17.1.2 Application
The protection and control IEDs have many functions included . Self supervision with
internal event list (SELFSUPEVLST) and internal error signals (INTERRSIG) function
provide supervision of the IED. The fault signals make it easier to analyze and locate a
fault.
Both hardware and software supervision is included and it is also possible to indicate
possible faults through a hardware contact on the power supply module and/or through the
software communication.
Internal events are generated by the built-in supervisory functions. The supervisory
functions supervise the status of the various modules in the IED and, in case of failure, a
corresponding event is generated. Similarly, when the failure is corrected, a
corresponding event is generated.
The event list is updated every 10s hence, an event will not be visible in
the event list as soon as it is created.
Apart from the built-in supervision of the various modules, events are also generated when
the status changes for the:
• built-in real time clock (in operation/out of order).
• external time synchronization (in operation/out of order).
• Change lock (on/off)
1MRK 506 334-UUS A Section 17
Basic IED functions
469
Application manual
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