Measurements and Recording P54x/EN MR/La4
MiCOM P543, P544, P545 & P546
(MR) 8-5
MR
1.2.1.4 Protection element starts and trips
Any operation of protection elements, (either a start or a trip condition) will be logged as an
event record, consisting of a text string indicating the operated element and an event value.
Again, this value is intended for use by the event extraction software, such as MiCOM S1
Studio, rather than for the user, and is therefore invisible when the event is viewed on the
LCD.
1.2.1.5 General events
A numbe
r of events come under the heading of ‘General Events’ - an example is shown
below:
Nature of event
Displayed text in event
record
Displayed value
Level 1 password modified,
either from user interface,
front or rear port.
PW1 modified UI, F, R or R2 0 UI=6, F=11, R=16, R2=38
A complete list of the ‘General Events’ is given in the Relay Menu Database (P54x/EN MD),
which is a separate document, available for downloading from our website.
1.2.1.6 Fault records
Each time
a fault record is generated, an event is also created. The event simply states that
a fault record was generated, with a corresponding time stamp.
Note 1: Viewing of the actual fault record is carried out in the Select Fault cell
further down the VIEW RECORDS column, which is selectable from
up to 15 records. These records consist of fault flags, fault location,
fault measurements etc.
Note 2: The time stamp given in the fault record itself will be more accurate
than the corresponding stamp given in the event record as the event
is logged some time after the actual fault record is generated.
The fault record is triggered from the ‘Fault REC. TRIG.’ signal assigned in the default
programmable scheme logic to relay 3, protection trip.
Note: The fault measurements in the fault record are given at the time of the
protection start. Also, the fault recorder does not stop recording until
any start or relay 3 (protection trip) resets in order to record all the
protection flags during the fault.
It is recommended that the triggering contact (relay 3 for example) be ‘self reset’ and not
latching. If a latching contact were chosen the fault record would not be generated until the
contact had fully reset.
1.2.1.7 Maintenance reports
Internal failu
res detected by the self-monitoring circuitry, such as watchdog failure, field
voltage failure etc. are logged into a maintenance report. The maintenance report holds up
to 5 such ‘events’ and is accessed from the Select Report cell at the bottom of the VIEW
RECORDS column.
Each entry consists of a self explanatory text string and a ‘Type’ and ‘Data’ cell, which are
explained in the menu extract at the beginning of this section.
Each time a Maintenance Report is generated, an event is also created. The event simply
states that a report was generated, with a corresponding time stamp.
To Next Page
Loading...
