Areva MiCOM P921, Technical Manual, Page: 164 / 376

P92x/EN FT/E11 Technical Guide
User Guide
Page 86/110 MiCOM P921-P922-P923
12.2 "FAULT RECORD" Menu
Fault records are stored in the non-volatile memory with the time of the fault to the
accuracy of 1 ms. A total of 5 such latest events are stored. In case of power supply
failure, this information is saved in the backup lithium battery.
When the available record space is exhausted, the relay will automatically overwrite
the oldest record, to accomodate the new record.
The fault records are available for viewing either via the frontplate LCD or remotely,
via the communications ports.
Local viewing on the LCD is achieved in the menu column entitled « FAULT
RECORD ». This column is described below :
To gain access to the “FAULT RECORD” sub-menu from the default display, press 2
once,
4
once,
2
once and
6
once
.
FAULT RECORD
Heading of the “FAULT RECORD” sub-menu
RECORD NUMBER
5
Description : This selects the required fault record from the
possible 5 that may be stored.
Range : 1 – 5, step = 1.
Note : a value of 5 corresponds to the latest fault and so on.
FAULT TIME
10 : 45 : 22 : 12
Description : time of the fault with an accuracy within 1ms. The
time of the fault recorded will be the time at which the protection
algorithm gives a trip/alarm order.
Note : read only, no modifications allowed.
FAULT DATE
02/05/00
Description : date of the fault recorded will be the date at
which the protection algorithm gives a trip/alarm order.
Note : read only, no modifications allowed.
ACTIVE SET GROUP
1
Description : active setting group at the time of the fault
Note : read only, no modifications allowed.
FAULTED PHASE
PHASE A B C
Description : phase(s) of fault
Note : read only, no modifications allowed.
TRIP ELEMENT
V<
Description : elements that tripped for the fault
Note : read only, no modifications allowed.
MAGNITUDE
xxxxxx
Description : magnitude of the voltage that has generated a
fault, at the instant of the fault
Note : read only, no modifications allowed.
VA MAGNITUDE
xxxxxx
Description : magnitude of the phase A voltage at the instant of
the fault (or Vab according to the connection scheme)
Note : read only, no modifications allowed.
VB MAGNITUDE
xxxxxx
Description : magnitude of the phase B voltage at the instant of
the fault (or Vbc according to the connection scheme)
Note : read only, no modifications allowed.