P746/EN MR/A11 Measurements and Recording
(MR) 8-
8
MiCOM P746
MR
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CBF Alarm Bus
CB
Alarm ADD DJ
Bus
Mld. LSV LSSS
FINT Alm
INTBarr
УРОВ: СИГН.ШСВ
母联 CB 失灵告警
CTS T1 STC T1
Mldg StW\d142
CZ
STI T1 КЦИ ТТ: КЛЕММА 1
T1 CT 断线
CTS T2 STC T2
Mldg StW\d142
X1
STI T2 КЦИ ТТ: КЛЕММА 2
T2 CT 断线
CTS T3 STC T3
Mldg StW\d142
X2
STI T3 КЦИ ТТ: КЛЕММА 3
T3 CT 断线
CTS T4 STC T4
Mldg StW\d142
X3
STI T4 КЦИ ТТ: КЛЕММА 4
T4 CT 断线
CTS T5 STC T5
Mldg StW\d142
X4
STI T5 КЦИ ТТ: КЛЕММА 5
T5 CT 断线
CTS T6 STC T6
Mldg StW\d142
X5
STI T6 КЦИ ТТ: КЛЕММА 6
T6 CT 断线
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,
rather than for the user, and is therefore invisible when the event is viewed on the LCD.
1.2.1.5 General events
A number 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 (P746/EN MD),
which is a separate document, available for downloaded 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 that 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 20 records. These
records consist of fault flags, fault location, fault measurements etc. Also note that 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 any trip (87BB or 50BF trip in the P746). 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 the reset of the ‘Fault REC. TRIG.’ signal in order to
record all the protection flags during the fault.
It is recommended that the triggering contact 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.
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