Synchrocheck; Tracking Frequency - GE L30 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.
If the 87L function is enabled, then dedicated 87L frequency tracking is engaged. In this case, the relay uses the

TRACKING FREQUENCY

PATH: ACTUAL VALUES METERING

SYNCHROCHECK 1

MESSAGE
MESSAGE
The actual values menu for synchrocheck 2 is identical to that of synchrocheck 1. If a synchrocheck function setting is "Dis-
abled", the corresponding actual values menu item will not be displayed.
PATH: ACTUAL VALUES METERING
TRACKING FREQUENCY
The tracking frequency is displayed here. The frequency is tracked based on configuration of the reference source. The
is based upon positive sequence current phasors from all line terminals and is synchronously
TRACKING FREQUENCY
adjusted at all terminals. If currents are below 0.125 pu, then the
GE Multilin
SRC 1 POWER FACTOR
φa:
1.000
SRC 1 POWER FACTOR
φb:
1.000
SRC 1 POWER FACTOR
φc:
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
value for all computations, overriding the
TRACKING FREQUENCY
SYNCHROCHECK
SYNCHROCHECK 1 DELTA
VOLT: 0.000 V
SYNCHROCHECK 1 DELTA
PHASE: 0.0°
SYNCHROCHECK 1 DELTA
FREQ: 0.00 Hz
TRACKING FREQUENCY
TRACKING FREQUENCY:
60.00 Hz
L30 Line Current Differential System
FREQUENCY
SYSTEM SETUP SIGNAL SOURCES
SYNCHROCHECK 1(2)
is used.
NOMINAL FREQUENCY
6.3 METERING
SETTINGS SYS-
).
METERING
value.
SOURCE FREQUENCY
6.3.4 SYNCHROCHECK
6.3.5 TRACKING FREQUENCY
6-17
6