Alstom SHPM 101 - On Load Check Importing Power with a Leading Power Faction

SERVICE MANUAL R5888B
QUADRAMHO Chapter 5
Appendix A
Page 17 of 18
Figure 11b: On load check importing power with a leading power faction
Lead Lag
V
A
θ
PH
θ
2
V
C
I
A
V
B
RCA
Operation
Measured at relay
with a phase θ1
angle meter
Voltage connections for
operation(see Fig. 9C)
Line
Relay
Also it is seen that
current reversal will give
operation for the normal
voltage connections
V
B
V
B
V
A
V
A
V
C
V
C
Power system information
θ
1
and θ
2
must show reasonable agreement
for the position of 1
A
θ
2
= TAN
–1
MVAR
MW