Alstom SHPM 101 - Behaviour for A-B-G Fault

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 47 of 71
Figure 52: Behaviour for A–B–G fault
NB: APPARENT TILTING OF
CHARACTERISTIC ANGLE IS DUE TO
RESIDUAL COMPENSATION APPLIED
WHICH IS CORRECT FOR SINGLE PHASE
FAULTS
Z1
A-G ZONE 1
A-G GUARD
APPARENT
FAULT
IMPEDANCE
B-G ZONE 1
B-G
GUARD
Z1
APPARENT
FAULT
IMPEDANCE
X
X