Frequency Rate Of Change; Flexelements - GE G60 Instruction Manual

6 ACTUAL VALUES
PATH: ACTUAL VALUES METERING
FREQUENCY RATE
OF CHANGE
MESSAGE
MESSAGE
MESSAGE
The metered frequency rate of change for the frequency rate of change elements is shown here.
PATH: ACTUAL VALUES METERING
FLEXELEMENT 1
The operating signals for the FlexElements™ are displayed in pu values using the following definitions of the base units.
Table 6–2: FLEXELEMENT™ BASE UNITS
dcmA
FREQUENCY

FREQUENCY RATE OF CHANGE

PHASE ANGLE
POWER FACTOR
RTDs
SENSITIVE DIR POWER
(Sns Dir Power)
SOURCE CURRENT
SOURCE ENERGY
(SRC X Positive and Negative
Watthours); (SRC X Positive and
Negative Varhours)
SOURCE POWER
SOURCE VOLTAGE
STATOR DIFFERENTIAL
CURRENT
(Stator Diff Iar, Ibr, and Icr)
STATOR GROUND 3RD
HARMONIC VOLTAGES
(Stator Gnd Vn/V0 3rd)
STATOR RESTRAINING
CURRENT
(Stator Diff Iad, Ibd, and Icd)
SYNCHROCHECK
(Max Delta Volts)
VOLTS PER HERTZ
GE Multilin
FREQUENCY RATE OF CHANGE
FREQUENCY RATE OF
CHANGE 1: 0.00 Hz/s
FREQUENCY RATE OF
CHANGE 2: 0.00 Hz/s
FREQUENCY RATE OF
CHANGE 3: 0.00 Hz/s
FREQUENCY RATE OF
CHANGE 4: 0.00 Hz/s

FLEXELEMENTS

FLEXELEMENT 1(16)
FLEXELEMENT 1
OpSig: 0.000 pu
BASE = maximum value of the
DCMA INPUT MAX
under the +IN and –IN inputs.
f = 1 Hz
BASE
df/dt = 1 Hz/s
BASE
ϕ
= 360 degrees (see the UR angle referencing convention)
BASE
PF = 1.00
BASE
BASE = 100°C
= maximum value of 3 × V
P
BASE
configured for the sensitive power directional element(s).
I = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
E = 10000 MWh or MVAh, respectively
BASE
P = maximum value of V
BASE BASE
V = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
I = maximum primary RMS value of the +IN and –IN inputs
BASE
(CT primary for source currents, and bus reference primary current for bus differential currents)
V = Primary phase voltage of the
BASE
I = maximum primary RMS value of the +IN and –IN inputs
BASE
(CT primary for source currents, and bus reference primary current for bus differential currents)
V = maximum primary RMS value of all the sources related to the +IN and –IN inputs
BASE
BASE = 1.00 pu
G60 Generator Management Relay
6.3.6 FREQUENCY RATE OF CHANGE
setting for the two transducers configured
× I
for the +IN and –IN inputs of the sources
BASE BASE
× I for the +IN and –IN inputs
BASE
STATOR GROUND SOURCE
6.3 METERING
6.3.7 FLEXELEMENTS™
6-17
6