GE C60 Instruction Manual page 166
Multilin
breaker management relay
ur series
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6.3 METERING
6.3 METERING
a) UR CONVENTION FOR MEASURING POWER AND ENERGY
The following figure illustrates the conventions established for use in UR relays.
Generator
G
M
Inductive
Generator
G
6
Inductive
M
G
Generator
G
Generator
Figure 6–1: FLOW DIRECTION OF SIGNED VALUES FOR WATTS AND VARS
6-6
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
C60 Breaker Management Relay
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
6 ACTUAL VALUES
6.3.1 METERING CONVENTIONS
+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
GE Multilin
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