GE UR Series L90, Instruction Manual, Page: 517 / 846

GE Multilin L90 Line Current Differential System 6-21
6 ACTUAL VALUES 6.3 METERING
6
6.3.4 SENSITIVE DIRECTIONAL POWER
PATH: ACTUAL VALUES

METERING

SENSITIVE DIRECTIONAL POWER
The effective operating quantities of the sensitive directional power elements are displayed here. The display may be useful
to calibrate the feature by compensating the angular errors of the CTs and VTs with the use of the
RCA
and
CALIBRATION
settings.
6.3.5 SYNCHROCHECK
PATH: ACTUAL VALUES

METERING

SYNCHROCHECK

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.
6.3.6 TRACKING FREQUENCY
PATH: ACTUAL VALUES

METERING

TRACKING FREQUENCY
The tracking frequency is displayed here. The frequency is tracked based on configuration of the reference source. The
TRACKING FREQUENCY
is based upon positive sequence current phasors from all line terminals and is synchronously
adjusted at all terminals. If currents are below 0.125 pu, then the
NOMINAL FREQUENCY
is used.
6.3.7 FREQUENCY RATE OF CHANGE
PATH: ACTUAL VALUES

METERING

FREQUENCY RATE OF CHANGE
The metered frequency rate of change for the frequency rate of change elements is shown here.

SENSITIVE

DIRECTIONAL POWER
DIRECTIONAL POWER 1
3

: 0.000 W
MESSAGE
DIRECTIONAL POWER 2
3

: 0.000 W

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

FREQUENCY RATE

OF CHANGE
FREQUENCY RATE OF
CHANGE 1: 0.00 Hz/s
MESSAGE
FREQUENCY RATE OF
CHANGE 2: 0.00 Hz/s
MESSAGE
FREQUENCY RATE OF
CHANGE 3: 0.00 Hz/s
MESSAGE
FREQUENCY RATE OF
CHANGE 4: 0.00 Hz/s