Metering Conventions - GE M60 UR Series Instruction Manual

6.3 METERING
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
Inductive
Generator
G
6
Inductive
M
G
Generator
G
Generator
Figure 6–1: FLOW DIRECTION OF SIGNED VALUES FOR WATTS AND VARS
6-14
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
M60 Motor Protection System
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