ABB 615 Series - Page 350

IG
IGsin
Forward
operating zone
Backward
operating zone
-VG
Correction
angle
non-tripping zone
Min operating
current

RCA
= -90 deg
GUID-20659C27-4886-497F-82E3-6EE27C8B9984 V1 EN
Figure 160: Operating characteristic Iosin(φ) in reverse fault
Example 3.
Iocos(φ) criterion selected, forward-type fault
=> FAULT_DIR = 1
Section 4 1MAC059074-MB A
Protection functions
344 615 series ANSI
Technical Manual