GE G60 UR Series, Instruction Manual

Page: 410 / 634

6-18 G60 Generator Protection System GE Multilin
6.3 METERING 6 ACTUAL VALUES
6
g) ENERGY METERING
PATH: ACTUAL VALUES
ÖØ
METERING
Ö
SOURCE SRC 1
ÖØ
ENERGY
The metered values for real and reactive energy 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
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
SIGNAL SOURCES
).
Because energy values are accumulated, these values should be recorded and then reset immediately prior to changing
CT or VT characteristics.
h) FREQUENCY METERING
PATH: ACTUAL VALUES
ÖØ
METERING
Ö
SOURCE SRC 1
ÖØ
FREQUENCY
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
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
SIGNAL SOURCES
).
SOURCE FREQUENCY
is measured via software-implemented zero-crossing detection of an AC signal. The signal is either a
Clarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration
(see the
SYSTEM SETUP
ÖØ
POWER SYSTEM
settings). The signal used for frequency estimation is low-pass filtered. The
final frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions and
transients.
6.3.4 SYNCHROCHECK
PATH: ACTUAL VALUES
ÖØ
METERING
ÖØ
SYNCHROCHECK
Ö
SYNCHROCHECK 1(2)
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.
6.3.5 TRACKING FREQUENCY
PATH: ACTUAL VALUES
ÖØ
METERING
ÖØ
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
setting in the
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
POWER SYSTEM
menu. Refer to the
Power System section of chapter 5 for additional details.
„
ENERGY
„
SRC 1
SRC 1 POS WATTHOUR:
0.000 Wh
MESSAGE
SRC 1 NEG WATTHOUR:
0.000 Wh
MESSAGE
SRC 1 POS VARHOUR:
0.000 varh
MESSAGE
SRC 1 NEG VARHOUR:
0.000 varh
„
FREQUENCY
„
SRC 1
SRC 1 FREQUENCY:
0.00 Hz
„
SYNCHROCHECK 1
„
SYNCHROCHECK 1 DELTA
VOLT: 0.000 V
MESSAGE
SYNCHROCHECK 1 DELTA
PHASE: 0.0°
MESSAGE
SYNCHROCHECK 1 DELTA
FREQ: 0.00 Hz
„
TRACKING FREQUENCY
„
TRACKING FREQUENCY:
60.00 Hz