GE N60 Instruction Manual page 378

METERING
Generator
G
M
Inductive
Generator
G
Inductive
M
6
G
Generator
G
Generator
6.3.1.2 UR convention for measuring phase angles
All phasors calculated by URs and used for protection, control and metering functions are rotating phasors that maintain
the correct phase angle relationships with each other at all times.
6-12
Figure 6-1: Flow direction of signed values for watts and VARs
Voltage
WATTS = Positive
VARS = Positive
PF = Lag
Current
UR RELAY
LOAD
Resistive
Voltage
WATTS = Positive
VARS = Negative
PF = Lead
Current
UR RELAY
LOAD
Resistive
Resistive
LOAD
Voltage
WATTS = Negative
VARS = Negative
PF = Lag
Current
UR RELAY
Resistive
LOAD
Voltage
WATTS = Negative
VARS = Positive
PF = Lead
Current
UR RELAY
827239AC.CDR
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
PER IEEE CONVENTIONS
PARAMETERS AS SEEN
BY THE UR RELAY
VCG
IC
VAG
IB IA
VBG
-
1
VCG
IA
IC
VAG
IB
VBG
-
2
VCG
IB
IA
VAG
IC
VBG
-
3
VCG
IB
VAG
IC
IA
VBG
-
4
CHAPTER 6: ACTUAL VALUES
+Q
PF = Lead PF = Lag
IA
-P +P
PF = Lag PF = Lead
-Q
S=VI
+Q
PF = Lead PF = Lag
-P +P
IA
PF = Lag PF = Lead
-Q
S=VI
+Q
PF = Lead PF = Lag
-P +P
IA
PF = Lag PF = Lead
-Q
S=VI
+Q
PF = Lead PF = Lag
IA
-P +P
PF = Lag PF = Lead
-Q
S=VI