Metering Conventions - GE L60 Instruction Manual

6 ACTUAL VALUES
6.3METERING
a) UR CONVENTION FOR MEASURING POWER AND ENERGY
The following figure illustrates the conventions established for use in UR-series relays.
Generator
G
M
LOAD
Inductive Resistive
Generator
G
LOAD
Resistive
Inductive Resistive
M
LOAD
G
Generator
Resistive
LOAD
G
Generator
Figure 6–1: FLOW DIRECTION OF SIGNED VALUES FOR WATTS AND VARS
GE Multilin
PER IEEE CONVENTIONS
Voltage
VCG
WATTS = Positive
VARS = Positive
PF = Lag
Current
IB
UR RELAY
VBG
VCG
Voltage
WATTS = Positive
IC
VARS = Negative
PF = Lead
Current
UR RELAY
VBG
-
2
VCG
Voltage
IA
WATTS = Negative
VARS = Negative
PF = Lag
Current
VBG
UR RELAY
-
3
VCG
Voltage
WATTS = Negative
VARS = Positive
PF = Lead
IA
Current
VBG
UR RELAY
827239AC.CDR
L60 Line Phase Comparison System

6.3.1 METERING CONVENTIONS

PARAMETERS AS SEEN
BY THE UR RELAY
IC
PF = Lead
-P
VAG
IA
PF = Lag
-
1
PF = Lead
IA
-P
VAG
PF = Lag
IB
PF = Lead
IB
VAG
-P
IA
PF = Lag
IC
IB
PF = Lead
IA
-P
VAG
IC
PF = Lag
-
4
6.3 METERING
+Q
PF = Lag
IA
+P
PF = Lead
-Q
S=VI
+Q
PF = Lag
+P
IA
PF = Lead
-Q
S=VI
+Q
PF = Lag
+P
PF = Lead
-Q
S=VI
+Q
PF = Lag
+P
PF = Lead
-Q
S=VI
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