ABB REF615 ANSI 5.0 FP1 - Page 21

21
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Figure 10. Application
example of single busbar
switchgear using the
most comprehensive
standard configura-
tion N and standard
configuration P
Figure 10 illustrates an application example of sin-
gle busbar switchgear using the most comprehen-
sive standard configuration N and P. The used main
protection functions overcurrent, ground-fault and
voltage based protection. Also thermal protection
is used for the protection of the outgoing feeder
cables. Additionally, an optional autoreclosing
function is used for the feeders with overhead line.
The relays are equipped with optional arc protec-
tion function enabling fast and selective arc pro-
tection throughout the switchgear. Standard con-
figuration P in the tie breaker is used for the
implementation of automatic transfer schemes.
3
52
3
52
Δ
Y
52
Υ or Δ
Υ or Δ
3
REF615 Conf N
67P/51P/50P
50BF
67G/51G/50G
27
27R
25
AFD
3
3
REF615 Conf N
51P/50P
50BF
67/51G/50G
49F
AFD
REF615 Conf N
51P/50P
50BF
67/51G/50G
79
AFD
3
52
3
52
Δ
Y
52
Υ or Δ
Υ or Δ
3
REF615 Conf N
67P/51P/50P
50BF
67G/51G/50G
27
27R
25
AFD
3
3
REF615 Conf N
51P/50P
50BF
67/51G/50G
49F
AFD
REF615 Conf N
51P/50P
50BF
67/51G/50G
79
AFD
52
3
REF615 Conf P
67P/51P/50P
50BF
67N/51N/50N
27
27R
25
AFD
1
1
3 3
Cable
Overhead
line
Cable
Overhead
line