The LHMI is simple and easy to understand. The whole front
plate is divided into zones, each with a well-defined
functionality:
• Status indication LEDs
• Alarm indication LEDs which can indicate three states with
the colors green, yellow and red, with user defined and
also printable label. All LEDs are configurable from the
PCM600 tool
• Liquid crystal display (LCD)
• Keypad with push buttons for control and navigation
purposes, switch for selection between local and remote
control and reset
• Five user programmable function buttons
• An isolated RJ45 communication port for PCM600
15. 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 presented
on the LHMI and in PCM600 event viewer tool.
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 be applied to 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 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.
Forcing of binary outputs, wether from the LHMI or from the
PCM600 is only possible when the IED is in test mode.
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.
The change lock function activation is normally connected to a
binary input.
Authorization
The user categories and roles with user rights as defined by IEC
62359–8 for role based access control are pre-defined in the
IED.
The IED users can be created, deleted and edited only with
PCM600.
Password policies are set in the PCM600 IED user management
tool.
At delivery, the IED user has full access as SuperUser until
users are created with PCM600.
Authority status ATHSTAT
Authority status ATHSTAT function is an indication function
block for user log-on activity.
User denied attempt to log-on and user successful log-on are
reported.
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:
Transformer protection RET650
1MRK 504 137-BEN B
Product version: 1.3
24
ABB
