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Section 15 Basic IED functions

15.1 Self supervision with internal event list

15.1.1 Identification

Function description IEC 61850

identification

IEC 60617

identification

ANSI/IEEE C37.2

device number

Internal error signal INTERRSIG - -

Internal event list SELFSUPEVLST - -

15.1.2 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)

Events are also generated:

• whenever any setting in the IED is changed.

1MRK 505 291-UEN A Section 15

Basic IED functions

297

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