Frequency Rate Of Change; Flexelements - GE T60 Instruction Manual

6 ACTUAL VALUES
The tracking frequency is displayed here. The frequency is tracked based on the selection of the reference source with the
FREQUENCY AND PHASE REFERENCE
System section of chapter 5 for details.

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 (Sheet 1 of 2)
BREAKER ACC ARCING AMPS
(Brk X Acc Arc Amp A, B, and C)
BREAKER ARCING AMPS
(Brk X Arc Amp A, B, and C)
DCmA
FREQUENCY

FREQUENCY RATE OF CHANGE

PHASE ANGLE
POWER FACTOR
RTDs
SOURCE CURRENT
SOURCE ENERGY
(Positive and Negative Watthours,
Positive and Negative Varhours)
SOURCE POWER
SOURCE THD & HARMONICS
SOURCE VOLTAGE
SYNCHROCHECK
(Max Delta Volts)
VOLTS PER HERTZ
XFMR DIFFERENTIAL CURRENT
(Xfmr Iad, Ibd, and Icd Mag)
GE Multilin
setting in the 
SETTINGS

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
2
× cycle
BASE = 2000 kA
2
BASE = 1 kA × cycle
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
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
BASE = 1%
V = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
V = maximum primary RMS value of all the sources related to the +IN and –IN inputs
BASE
BASE = 1.00 pu
I = maximum primary RMS value of the +IN and -IN inputs
BASE
(CT primary for source currents, and transformer reference primary current for transformer
differential currents)
T60 Transformer Protection System

SYSTEM SETUP POWER SYSTEM
6.3.6 FREQUENCY RATE OF CHANGE
setting for the two transducers configured
× I
for the +IN and –IN inputs
BASE
6.3 METERING
menu. See the Power
6.3.7 FLEXELEMENTS
6
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