17
—
Figure 6. Substation
example with overcur-
rent and ground-fault
protection using the
standard configuration D
Figure 6 shows a substation example with overcur-
rent and ground-fault protection using the stan-
dard configuration D. Additionally voltage and fre-
quency based protection is used with standard
configuration F. The relays are equipped with op-
tional arc protection function enabling fast and se-
lective arc protection throughout the switchgear.
Additionally for the feeder with overhead line the
optional autoreclosing function is used.
3
52
3
52
Δ
Y
52
Υ
or
Δ
3
REF615 Conf D
51P/50P
50BF
51G/50G
AFD
3
REF615 Conf F
51P/50P
50BF
67G/51G/50G
49F
AFD
REF615 Conf F
51P/50P
50BF
67G/51G/50G
79
AFD
Cable
Overhead
line