ABB REQ650 - Page 60

3
3
1
REQ650 (A01)
Z
SC
: High
IEC10000151-2-en.vsd
Phase – earth fault
IEC10000151 V2 EN
Figure 17: Fault for step 1 setting
In case of a single phase earth-fault in zone 1 reach in the shortest line from the remote
busbar, as shown in figure 18, the current to the protection is I
0
= 1.1 kA.
Section 3 1MRK 505 291-UEN A
REQ650 setting examples
54
Application manual