13. Basic IED functions
Self supervision with internal event list
The Self supervision with internal event list
(INTERRSIG and SELFSUPEVLST) function reacts
to internal system events generated by the different
built-in self-supervision elements. The internal
events are saved in an internal event list.
Time synchronization
Use a common global source for example GPS time
synchronization inside each substation as well as
inside the area of the utility responsibility to achieve
a common time base for the IEDs in a protection
and control system. This makes comparison and
analysis of events and disturbance data between all
IEDs in the power system possible.
Time-tagging of internal events and disturbances
are an excellent help when evaluating faults.
Without time synchronization, only the events within
the IED can be compared to one another. With time
synchronization, events and disturbances within the
entire station, and even between line ends, can be
compared during evaluation.
In the IED, the internal time can be synchronized
from a number of sources:
• SNTP
• IRIG-B
• DNP
• IEC60870-5-103
Parameter setting groups ACTVGRP
Use the four different groups of settings to optimize
the IED operation for different power system
conditions. Creating and switching between fine-
tuned setting sets, either from the local HMI or
configurable binary inputs, results in a highly
adaptable IED that can cope with a variety of power
system scenarios.
Test mode functionality TESTMODE
The protection and control IEDs may have many
included functions. To make the testing procedure
easier, the IEDs include the feature that allows
individual blocking of all functions except the
function(s) the shall be tested.
There are two ways of entering the test mode:
• By configuration, activating an input signal of
the function block TESTMODE
• By setting the IED in test mode in the local HMI
While the IED is in test mode, all protection
functions and some control functions are blocked.
Any function can be unblocked individually
regarding functionality and event signaling. This
enables the user to follow the operation of one or
several related functions to check functionality and
to check parts of the configuration, and so on.
Change lock function CHNGLCK
Change lock function (CHNGLCK) is used to block
further changes to the IED configuration and
settings once the commissioning is complete. The
purpose is to block inadvertent IED configuration
changes beyond a certain point in time.
Authority status ATHSTAT
Authority status (ATHSTAT) function is an indication
function block for user log-on activity.
Authority check ATHCHCK
To safeguard the interests of our customers, both
the IED and the tools that are accessing the IED are
protected, by means of authorization handling. The
authorization handling of the IED and the PCM600
is implemented at both access points to the IED:
• local, through the local HMI
• remote, through the communication ports
14. Station communication
IEC 61850-8-1 communication protocol
The IED supports the communication protocols IEC
61850-8-1 and DNP3 over TCP/IP. All operational
information and controls are available through these
protocols. However, some communication
functions, for example, horizontal communication
(GOOSE) between the IEDs, is only enabled by the
IEC 61850-8-1 communication protocol.
The IED is equipped with an optical Ethernet rear
port for the substation communication standard IEC
Bay control REC650 ANSI
1MRK 511 265-BUS B
Product version: 1.2
ABB 31
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