Siemens Reyrolle 7SR5 Manual page 282

Protection and Automation Functions
5.19 67 Directional Overcurrent/Earth Fault
[dw_7SR5_function67SettingExample2, 1, en_US]
Figure 5-34
[dw_7SR5_function67SettingExample3, 1, en_US]
Figure 5-35
Considering the D-G feeder fault shown in
be similar and their associated relays will have similar prospective operate times. To ensure that only the
282
Application of Directional Overcurrent Protection
Feeder Fault on Interconnected Network
Figure 5-35: the current magnitude through breakers C and D will
Reyrolle 7SR5, Transformer Protection Device, Device Manual
C53000-G7040-C015-1, Edition 11.2019