Micom P721, Technical Manual

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User Guide P72x/EN FT/C21
MiCOM P721/P723 Page 35/38
2.9.2 INSTANTANEOUS RECORDS submenu
Through the INSTANANEOUS RECORDS submenu, it is possible to read recorded values
associated with the crossing of a threshold (start information).
RECORDS
Instantaneous
Records
Heading of the Instantaneous records submenu.
Number
5
Select the number of Instantaneous records to be
displayed (maximum 5).
Hour
13:07:15:53
Displays the time when the instantaneous record was
recorded. The format of the time is hh:mm:ss: ms.
In this example the fault was recorded at 1:07:15 pm and
530 ms.
Date
12/11/01
Displays the date when the instantaneous record was
recorded. The format of the Date is DD/MM/YY.
In this example, the fault was recorded on November
12th 2001.
Origin
Ie>
Displays which threshold has been crossed.
Length
57
ms
Displays the period of time during which the threshold
has been exceeded.
Trip
No
Displays if a trip followed the crossing of the threshold or
not.
2.9.3 DISTURBANCE RECORD submenu
The Disturb Record submenu makes it possible to set and read up disturbance records.Up to
15 seconds disturbance record(s) duration can be stored (5 x 3s, 3 x 5s, 2 x 7.5s, 4 x 3.75s
or 1 x 15s). The beginning of the record can be adjusted with a selected pre-time.
RECORD
Disturb Record
Heading of the Disturb Record submenu.
Pre-Time
0.2
s
Set the disturbance record pre-time, from 100ms to 3s
(step 100ms). The pre-time adjusts the beginning of the
disturbance record: In this example, the record starts
200ms before the disturbance. Its length is fixed.
Post-Time
0.2
s
Set the disturbance record post-time, from 100 ms to 3s
(step 100ms). The total disturbance recording time is 3
seconds (pre-time + post-time).
Disturb Rec Trig
ON
INST.
Select which criteria will start the disturbance record
function. Setting choices are ON INST. (starts recording
on instantaneous thresholds) or ON TRIP (starts
recording after a trip happened).