GE 869 - Page 68

8-10 869 MOTOR PROTECTION SYSTEM – COMMUNICATIONS GUIDE
THE IEC 61850 CONFIGURATOR CHAPTER 8: IEC 61850
The equations to calculate minimum (min) and maximum (max) values in the MMXU
nodes are as follows:
Table 8-3: Calculate Min/Max MMXU Node Values
See the following list of supported parameters. Note that the same list is also
supported for the MSQI logical node. MSQI parameters are displayed only if the relay
supports sensitive ground CT.
MMXU Node Value To Calculate
TotW max = (Phase CT Primary * 46) * (Phase VT Ratio * 240) / 1000
min = -max
Note that the max is divided by 1000 to convert from W to kW
TotVar max = (Phase CT Primary * 46) * (Phase VT Ratio * 240) / 1000
min = -max
TotVA max = (Phase CT Primary * 46) * (Phase VT Ratio * 240) / 1000
min = -max
TotPF max = 1
min = -1
Hz max = 90
min = 0
HzRte max = 15
min = -15
PPV max = Phase VT Ratio * 240
min = 0
PhV max = Phase VT Ratio * 240
min = 0
A$phsA, phsB, phsC max = (Phase CT Primary * 46)
min = 0
A$neut max = (Ground CT Primary * 46)
min = 0
A$net max = (Phase CT Primary * 46)
min = 0
A$res max = (Sens. Ground CT Primary * 3)
min = 0
AuxV max = Aux. VT Ratio * 240
min = 0
SeqA$c1, c2 ,c3 max = (Phase CT Primary * 46)
min = 0
SeqV$c1, c2, c3 max = (Phase VT Ratio * 240)
min = 0
dbAng angle dB = (DB percentage* 360)
Supported Parameters
869.MMXU1$CF$TotW$db
869.MMXU1$CF$TotVAr$db
869.MMXU1$CF$TotVA$db
869.MMXU1$CF$TotPF$db
869.MMXU1$CF$Hz$db
869.MMXU1$CF$Hz3VT$db
869.MMXU1$CF$HzVx$db
869.MMXU1$CF$PPV$phsAB$db
869.MMXU1$CF$PPV$phsAB$dbAng
869.MMXU1$CF$PPV$phsBC$db
869.MMXU1$CF$PPV$phsBC$dbAng
869.MMXU1$CF$PPV$phsCA$db