ABB 615 series Technical Manual page 249

1MAC059074-MB A
615 series ANSI
Technical Manual
GUID-56AF9F5B-BFEA-4775-865F-2C76D9D3BCCC-ANSI V1 EN
Figure 118: Single-phase ground fault, phase A
In an example of the phasors in a two-phase short-circuit failure where the fault is between
the phases B and C, the angle difference is measured between the polarizing quantity V
and operating quantity I
B
- I marked as φ.
C
Section 4
Protection functions
AB
243