Monitoring & Control
262 PRS-7367
5.9 Event Records
5.9.1 Overview
The protective device record events in an event log. This allows you to establish the sequence of
events that led up to a particular situation. For example, a change in a digital input signal or
protection element output signal would cause an event record to be created and stored in the
event log. This could be used to analyze how a particular power system condition was caused.
These events are stored in the IED's non-volatile memory. Each event is time tagged. The time
resolution is 1ms.
The event records can be displayed on an IED's front panel but it is easier to view them through
the configuration software. This can extract the events log from the device and store it as a file for
analysis on a PC.
The event records are detailed in the EVENTS column. The first event (0) is always the latest
event. After selecting the required event, you can scroll through the menus to obtain further
details.
5.9.2 Fault Record Events
An event record is created for every fault the IED detects. This is also known as a fault record.
The IED contains a separate register containing the latest fault records. This provides a
convenient way of viewing the latest fault records and saves searching through the event log. You
access these fault records using the Select Fault setting, where fault number 0 is the earliest fault.
The event is logged as soon as the fault recorder stops. The time stamp assigned to the fault
corresponds to the start of the fault. The fault operating relative time is the subtraction between the
fault stop moment and the fault start moment, and the time is in milliseconds.
The IED can store 512 latest time tagged fault record events.
5.9.3 Alarm Record Events
The IED monitors itself on power up and continually thereafter. If it notices any problems, it will
register an alarm event. The alarm records include protection alarm records and device self-check
records.
5.9.3.1 Protection Alarm Record
The IED provides self-check alarm information that reflects the communication status between
devices, such as carrier channel abnormal, fiber channel abnormal, SV communication abnormal,
GOOSE communication abnormal, etc.
The IED provides self-check alarm information that reflects the external circuit such as analog
error information (CT disconnection, PT disconnection, etc.) and abnormal information of primary
switch state (abnormal trip position, trip signal long time input, etc.)
The IED can store 512 latest time tagged alarm records.
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