Synchrocheck; Tracking Frequency - GE T60 Instruction Manual

6.3 METERING
 menu. For each quantity, the relay displays the demand over the most recent demand time interval, the maxi-
DEMAND
mum demand since the last maximum demand reset, and the time and date stamp of this maximum demand value. Maxi-
mum demand quantities can be reset to zero with the
i) FREQUENCY METERING
PATH: ACTUAL VALUES
 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.
j) CURRENT HARMONICS AND THD METERING
PATH: ACTUAL VALUES
 CURRENT HARMONICS
 SRC 1
6
The metered current harmonics values 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
harmonics are measured for each source for the total harmonic distortion (THD) and 2nd to 25th harmonics per phase.
PATH: ACTUAL VALUES
 SYNCHROCHECK 1

If a synchrocheck function setting is "Disabled", the corresponding actual values menu item is not displayed.
PATH: ACTUAL VALUES
 TRACKING FREQUENCY

6-22
 
METERING SOURCE SRC 1
SRC 1 FREQUENCY:
0.00 Hz
 settings). The signal used for frequency estimation is low-pass filtered. The
POWER SYSTEM
 
METERING SOURCE SRC 1
SRC 1
Ib: 0.0 Ic:
SRC 1
MESSAGE
Ib: 0.0 Ic:
SRC 1
MESSAGE
Ib: 0.0 Ic:
SRC 1 25TH Ia:
MESSAGE
Ib: 0.0 Ic:
 
METERING

SYNCHROCHECK

SYNCHROCHECK 1 DELTA
VOLT: 0.000 V
SYNCHROCHECK 1 DELTA
MESSAGE
PHASE:
SYNCHROCHECK 1 DELTA
MESSAGE
FREQ:
 
METERING

TRACKING FREQUENCY

TRACKING FREQUENCY:
60.00 Hz
T60 Transformer Protection System

CLEAR RECORDS CLEAR DEMAND RECORDS

FREQUENCY

SETTINGS SYSTEM SETUP

CURRENT HARMONICS
THD Ia: 0.0
0.0%
2ND Ia: 0.0
0.0%
3RD Ia: 0.0
0.0%
↓
0.0
0.0%

SETTINGS SYSTEM SETUP

SYNCHROCHECK 1(4)
0.0°
0.00 Hz
6 ACTUAL VALUES
command.
 ).
SIGNAL SOURCES

SIGNAL SOURCES
6.3.4 SYNCHROCHECK
6.3.5 TRACKING FREQUENCY
). Current
GE Multilin