Synchrocheck - GE L30 Instruction Manual
Line current differential
system
ur series
Hide thumbs
Also See for L30:
- Instruction manual (702 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (667 pages)
Table of Contents
Advertisement
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 is replaced by whatever name was programmed by the user for the associated source (see
).
SETUP
SIGNAL SOURCES
When VTs are configured in wye, the L30 calculates power in each phase and three-phase power is measured as
When VTs are configured in delta, the L30 does not calculate power in each phase and three-phase power is measured as
where
S is the apparent power
V
, V
, V
, I
, I
, I
are phase voltage and phase current phasors
A
B
C
A
B
C
V
and V
are phase-to-phase voltage phasors
AB
CB
Î is the conjugate of I
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
If a synchrocheck function setting is "Disabled", the corresponding actual values menu item is not displayed.
GE Multilin
SRC 1
POWER FACTOR
φa:
1.000
SRC 1
POWER FACTOR
φb:
1.000
SRC 1
POWER FACTOR
φc:
1.000
S = V
x Î
+ V
A
A
B
S = V
x Î
AB
A
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
L30 Line Current Differential System
x Î
+ V
x Î
B
C
C
+ V
x Î
CB
C
FREQUENCY
SYSTEM SETUP
SIGNAL SOURCES
SYNCHROCHECK 1(4)
6.3 METERING
SETTINGS
SYSTEM
(EQ 6.1)
(EQ 6.2)
).
METERING
value.
SOURCE FREQUENCY
6.3.4 SYNCHROCHECK
6-19
6
Advertisement
Table of Contents
