ABB REQ650 Applications Manual page 62

Section 3
REQ650 setting examples
56
Ph – ea fault
3
Z : High
SC
IEC10000153 V1 EN
Figure 19: Fault for step 2 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 20, the current to the protection is I = 1.0 kA.
REQ650 (A01)
1
3
IEC10000153-1-en.vsd
1MRK 505 291-UEN A
Application manual