CHAPTER 6: ACTUAL VALUES
METERING
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
6-23
6
The harmonics are a percentage of the fundamental signal obtained as a ratio of harmonic amplitude to fundamental
amplitude multiplied by 100%. The total harmonic distortion (THD) is the ratio of the total harmonic content to the
fundamental:
Eq. 6-4
6.4.4 Sensitive directional power
ACTUAL VALUES
METERING
SENSITIVE DIRECTIONAL POWER
DIRECTIONAL POWER 1(2)
The effective operating quantities of the sensitive directional power elements display here. The display is useful to calibrate
the feature by compensating the angular errors of the CTs and VTs with the use of the
RCA
and
CALIBRATION
settings.
6.4.5 Synchrocheck
ACTUAL VALUES
METERING
SYNCHROCHECK
SYNCHROCHECK 1(10)
If synchrocheck or a setting is "Disabled," the corresponding actual values menu item does not display.
Voltage harmonics are calculated only for Wye connected phase VTs. Ensure that the
SYSTEM SETUP
AC INPUTS
VOLTAGE BANK F5
PHASE VT XX CONNECTION
setting is “Wye” to enable voltage harmonics metering.
DIRECTIONAL
POWER 1
DIRECTIONAL POWER 1
3
Φ
: 0.000 W
SYNCHROCHECK 1
SYNCHROCHECK 1 DELTA
VOLT: 0.000 kV
SYNCHROCHECK 1 DELTA
FREQ: 0.00
Hz
SYNCHROCHECK 1
DELTA PHASE: 0.0°
SYNCHROCHECK 1
SYNSCP D_PH: 0.0°
SYNCHROCHECK 1
V1 MAG: 0.000 kv
SYNCHROCHECK 1
V1 ANG: 0.0°
SYNCHROCHECK 1
V2 MAG: 0.000 kV
SYNCHROCHECK 1
V2 ANG: 0.0°
SYNCHROCHECK 1 PROJ
V2 MAG: 0.000 kV
SYNCHROCHECK 1 PROJ
V2 ANG: 0.0°
SYNCHROCHECK 1 PROJ
DELTA_PHASE: 0.0°
SYNCHROCHECK 1 PROJ
SYNSCP D_PH: 0.0°