GE Multilin g60

GE Multilin G60 Generator Protection System 6-21
6 ACTUAL VALUES 6.3 METERING
6
6.3.8 FLEXELEMENTS™
PATH: ACTUAL VALUES  METERING  FLEXELEMENTS  FLEXELEMENT 1(16)
The operating signals for the FlexElements™ are displayed in pu values using the following definitions of the base units.
 FLEXELEMENT 1

FLEXELEMENT 1
OpSig: 0.000 pu
Table 6–2: FLEXELEMENT™ BASE UNITS
dcmA BASE = maximum value of the DCMA INPUT MAX setting for the two transducers configured
under the +IN and –IN inputs.
FIELD CURRENT I
BASE
= maximum value setting defined for the specific transducer input configured
FIELD GROUND CURRENT I
BASE
= 5 mA
FIELD GROUND FAULT
LOCATION
BASE = 100%
FIELD GROUND INJECTED
VOLTAGE
V
BASE
= 15 V
FIELD GROUND RESISTANCE R
BASE
= 250 KΩ
FIELD VOLTAGE V
BASE
= 500 V
FREQUENCY f
BASE
= 1 Hz
FREQUENCY RATE OF CHANGE df/dt
BASE
= 1 Hz/s
PHASE ANGLE 
BASE
= 360 degrees (see the UR angle referencing convention)
POWER FACTOR PF
BASE
= 1.00
RTDs BASE = 100°C
SENSITIVE DIR POWER
(Sns Dir Power)
P
BASE
= maximum value of 3  V
BASE
 I
BASE
for the +IN and –IN inputs of the sources
configured for the sensitive power directional element(s).
SOURCE CURRENT I
BASE
= maximum nominal primary RMS value of the +IN and –IN inputs
SOURCE ENERGY
(Positive and Negative Watthours,
Positive and Negative Varhours)
E
BASE
= 10000 MWh or MVAh, respectively
SOURCE POWER P
BASE
= maximum value of V
BASE
 I
BASE
for the +IN and –IN inputs
SOURCE VOLTAGE V
BASE
= maximum nominal primary RMS value of the +IN and –IN inputs
STATOR DIFFERENTIAL
CURRENT
(Stator Diff Iar, Ibr, and Icr)
I
BASE
= maximum primary RMS value of the +IN and –IN inputs
(CT primary for source currents, and bus reference primary current for bus differential currents)
STATOR GROUND 3RD
HARMONIC VOLTAGES
(Stator Gnd Vn/V0 3rd)
V
BASE
= Primary auxiliary voltage of the STATOR GROUND SOURCE
STATOR GROUND RESISTANCE R
BASE
= 10 KΩ
STATOR GROUND SUB-
HARMONIC VOLTAGE
V
BASE
= nominal secondary voltage of auxiliary VT for the stator ground source
STATOR GROUND SUB-
HARMONIC CURRENT
I
BASE
= ground CT primary current of stator ground source
STATOR RESTRAINING
CURRENT
(Stator Diff Iad, Ibd, and Icd)
I
BASE
= maximum primary RMS value of the +IN and –IN inputs
(CT primary for source currents, and bus reference primary current for bus differential currents)
SYNCHROCHECK
(Max Delta Volts)
V
BASE
= maximum primary RMS value of all the sources related to the +IN and –IN inputs
VOLTS PER HERTZ BASE = 1.00 pu