Tracking Frequency - GE T35 Instruction Manual

6.3 METERING
# FREQUENCY
# SRC 1
Six identical Source menus are available. The "SRC 1" text will be replaced by whatever name was programmed by the
user for the associated source (see
is measured via software-implemented zero-crossing detection of an AC signal. The signal is either a
SOURCE FREQUENCY
Clarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration
(see the
SYSTEM SETUP
final frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions and
transients.
PATH: ACTUAL VALUES

# TRACKING FREQUENCY

#
The tracking frequency is displayed here. The frequency is tracked based on configuration of the reference source. The
TRACKING FREQUENCY
adjusted at all terminals. If currents are below 0.125 pu, then the
PATH: ACTUAL VALUES
# FLEXELEMENT 1
#
The operating signals for the FlexElements™ are displayed in pu values using the following definitions of the base units.
6
Table 6–2: FLEXELEMENT™ BASE UNITS
dcmA
FREQUENCY
PHASE ANGLE
POWER FACTOR
RTDs
SOURCE CURRENT
SOURCE POWER
SOURCE VOLTAGE
XFMR DIFFERENTIAL CURRENT
(Xfmr Iad, Ibd, and Icd Mag)
XFMR DIFFERENTIAL
HARMONIC CONTENT
(Xfmr Harm2 Iad, Ibd, and Icd Mag)
(Xfmr Harm5 Iad, Ibd, and Icd Mag)
XFMR RESTRAINING CURRENT
(Xfmr Iar, Ibr, and Icr Mag)
6-14
SRC 1 FREQUENCY:
0.00 Hz
!"
SETTINGS SYSTEM SETUP
!" settings). The signal used for frequency estimation is low-pass filtered. The
POWER SYSTEM
!" !"
METERING TRACKING FREQUENCY
TRACKING FREQUENCY:
60.00 Hz
is based upon positive sequence current phasors from all line terminals and is synchronously
!" !"
METERING FLEXELEMENTS
FLEXELEMENT 1
OpSig: 0.000 pu
BASE = maximum value of the
under the +IN and –IN inputs.
f = 1 Hz
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
P = maximum value of V
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 transformer reference primary current for transformer
differential currents)
BASE = 100%
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)
T35 Transformer Management Relay
!"
SIGNAL SOURCES
NOMINAL FREQUENCY
!
FLEXELEMENT 1(16)
setting for the two transducers configured
DCMA INPUT MAX
× I
for the +IN and –IN inputs
BASE BASE
6 ACTUAL VALUES
).
6.3.4 TRACKING FREQUENCY
is used.
6.3.5 FLEXELEMENTS™
GE Multilin