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7UT51 v3
14.5
Operational/Event Log
and Fault Logs
The relay records in internal logs messages describing
events. The Event Log includes the 50 most recent
events of all types, including pickup and dropout of
active protection functions, activation and deactivation
of contact inputs, signal contact outputs, trips, relay
diagnostics, and other relay operational information.
Three (3) additional logs, the Fault Logs, each record
up to 80 fault-related events that occur from the pickup
to the dropout of any active protection function.
If a log becomes full and another event occurs, the
oldest message in the log is discarded to make room
in memory for the new event message. If a pickup
occurs (starting a new fault log), the oldest fault log will
be discarded if necessary to make room for the new
fault log.
You can manually clear a log, and you can export its
contents through the serial ports on the relay. The
WinDIGSI software running on a PC connected to the
relay can store as many event-messages as you wish
to save.
Each event message has three parts:
•
The date and time of the event (to the nearest
millisecond)
•
A description of the event
•
An indication of whether the condition that
triggered the event was starting (C, for " coming ")
or ending (G, for " going "). For example, a pickup
will generate two events, one at the time of pickup
and one at the time of dropout. Events which have
no duration are always marked as "coming".
Only the three most recent fault logs can be displayed
on the front panel LCD; however, as many fault logs
as required and be store on a PC using WinDIGSI
software.
PRIM-2330C
Operation Using the Front Panel Controls
For each event, the data and time of the event are
displayed on the top line, while the event type and
coming/going code is displayed on the bottom line. For
example:
04/12/96 08:32:52??
LED Buff.Inva:G
Unused memory locations of a log contain the
message "empty."
To set the date and time, see Section 14.12 on
page 152.
Remember that a protection function must be enabled
and active to generate events.
The first trip log entry message displays the fault
number as recorded since the relay memory was last
cleared. Subsequent display messages indicate all
relay events that occur after initial detection of the fault
until drop-out. "Table overflow" is displayed in the last
message slot when messages are lost due to memory
overflow, and "Table superseded" is displayed when a
new fault has occurred while displaying the fault data.
14.5.1
Viewing a Log
To view the Event Log on the front-panel LCD, press
the Event key, then scroll through it using the
up-arrow and down-arrow keys. To view a fault, go to
its address, then scroll.:
5100 Operational Annunciations
Contains the 50 most recent event messages,
both operational and fault messages, with older
messages overwritten by newer messages.
Possible messages are listed in Table 13.1.
5200 LAST FAULT
5300 2nd TO LAST FAULT
5400 3rd TO LAST FAULT
Each fault log contains up to 80 fault
messages beginning with the pickup of any active protection
function and ending with the dropout of that function. If
necessary to make room, the oldest fault log and/or oldest
event messages within a log may be overwritten.
Possible messages are listed in Table 13.1.
14
-
related event
145
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