Tracking Frequency; Flexelements - GE T35 Instruction Manual

6 ACTUAL VALUES
MESSAGE
MESSAGE
MESSAGE
The metered values for real, reactive, and apparent power, as well as power factor, are displayed in this menu. The "SRC
1" text will be replaced by whatever name was programmed by the user for the associated source (see

TEM SETUP SIGNAL SOURCES
g) FREQUENCY METERING

PATH: ACTUAL VALUES METERING
 FREQUENCY
 SRC 1
The metered frequency values are displayed in this menu. The "SRC 1" text will be replaced by whatever name was pro-
grammed 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 METERING
 TRACKING FREQUENCY

The tracking frequency is displayed here. The frequency is tracked based on the selection of the reference source with the
FREQUENCY AND PHASE REFERENCE
Power System section of chapter 5 for additional details.

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)
dcmA
FREQUENCY
PHASE ANGLE
POWER FACTOR
RTDs
SOURCE CURRENT
SOURCE POWER
SOURCE VOLTAGE
GE Multilin
SRC 1 POWER FACTOR
a:
1.000
SRC 1 POWER FACTOR
b:
1.000
SRC 1 POWER FACTOR
c:
1.000
).
 
SOURCE SRC 1
SRC 1 FREQUENCY:
0.00 Hz
SETTINGS
settings). The signal used for frequency estimation is low-pass filtered. The
POWER SYSTEM


TRACKING FREQUENCY

TRACKING FREQUENCY:
60.00 Hz
setting in the
SETTINGS
 

FLEXELEMENTS

FLEXELEMENT 1
OpSig: 0.000 pu
BASE = maximum value of the
under the +IN and –IN inputs.
f = 1 Hz
BASE

= 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
T35 Transformer Protection System
FREQUENCY
 
SYSTEM SETUP SIGNAL SOURCES
 
SYSTEM SETUP POWER SYSTEM
FLEXELEMENT 1(16)
DCMA INPUT MAX setting for the two transducers configured
 I
for the +IN and –IN inputs
BASE BASE
6.3 METERING

SETTINGS SYS-
).
6.3.4 TRACKING FREQUENCY
menu. Refer to the
6.3.5 FLEXELEMENTS™
6-17
6