ABB 615 Series - Page 351

IG
IGcos

RCA
= 0 deg
Forward
tripping zone
Backward
tripping zone
-VG
Correction
angle
non-tripping
zone
Min operating
current
GUID-5D6DC72B-7B8F-4B8B-B345-767CC1302BC2 V1 EN
Figure 161: Operating characteristic Iocos(φ) in forward fault
Example 4.
Iocos(φ) criterion selected, reverse-type fault
=> FAULT_DIR = 2
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 345
Technical Manual