GE G30 Instruction Manual page 434

6.3 METERING
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 G30 calculates power in each phase and three-phase power is measured as
When VTs are configured in delta, the G30 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
6
Î is the conjugate of I
g) ENERGY METERING
PATH: ACTUAL VALUES
 ENERGY
 SRC 1
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
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
 FREQUENCY
 SRC 1
6-20
SRC 1 APPARENT PWR
MESSAGE
φb:
0.000
SRC 1 APPARENT PWR
MESSAGE
φc:
0.000
SRC 1 POWER FACTOR
MESSAGE
3φ:
SRC 1 POWER FACTOR
MESSAGE
φa:
SRC 1 POWER FACTOR
MESSAGE
φb:
SRC 1 POWER FACTOR
MESSAGE
φc:
).
S = V x Î
A
S = V
 
METERING SOURCE SRC 1
SRC 1 POS WATTHOUR:
0.000
SRC 1 NEG WATTHOUR:
MESSAGE
0.000
SRC 1 POS VARHOUR:
MESSAGE
0.000
SRC 1 NEG VARHOUR:
MESSAGE
0.000
 
METERING SOURCE SRC 1
SRC 1 FREQUENCY:
0.00 Hz
G30 Generator Protection System
VA
VA
1.000
1.000
1.000
1.000
+ V x Î + V x Î
A B B C C
x Î + V x Î
AB A CB C

ENERGY
Wh
Wh
varh
varh

SETTINGS

FREQUENCY
6 ACTUAL VALUES

SETTINGS

SYSTEM SETUP SIGNAL SOURCES
GE Multilin
SYSTEM
(EQ 6.1)
(EQ 6.2)
).