Micom P721, Technical Manual

Page: 218 / 334

P72x/EN CT/A11 Communication database
Page 28/78 MiCOM P721/P723
3.15 Page 37h – Fault record value data
Access in word reading ( function 03 )
Addresses Contents
3700h Fault value record n°1
3701h Fault value record n°2
3702h Fault value record n°3
… …
3718h
Fault value record n°25
Each record is made up of 15 words:
Word Nr. Contents
1 Fault number
PRIVATE FORMAT: 2 & 3 Fault date (number of seconds since 01/01/94)
PRIVATE FORMAT: 4 & 5 Fault date (milli-seconds)
IEC FORMAT: 2 to 5 Fault date (see format of time synchronisation, address 0800h)
6 Fault date (season)
0=
winter
1= summer
2= undefined
7 Active setting group during the fault (1 or 2)
8 Phase/earth fault origin (format F77)
9 Fault recording starting origin (format F78)
10 Fault value
11 Phase A current value (nominal value)
12 Phase B current value (nominal value)
13 Phase C current value (nominal value)
14 Earth current value (nominal value)
15 Acknowledgement:
0 = fault not acknowledged
1 = fault acknowledged
3.15.1 Calculation formula for phase current values
Line phase current value (primary value) = phase sampled value (e.g. word 10, 11, 12 or 13)
x phase primary CT / phase internal CT ratio (mapping address 0007 = 800)
3.15.2 Calculation formula for earth current values
Line earth current value (primary value) = earth sampled value (e.g. word 10 or 14) * earth
primary CT ratio / earth internal CT ratio (mapping address 0008h).
3.16 Page 3Eh – Fault older record data
Access in word reading ( function 03 )
Addresses Contents
3E00h Most older Fault record