ABB REF615 ANSI 5.0 FP1 Product Manual page 21

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Figure 10 illustrates an application example of sin-
Figure 10. Application
example of single busbar
gle busbar switchgear using the most comprehen-
switchgear using the
sive standard configuration N and P. The used main
most comprehensive
standard configura-
protection functions overcurrent, ground-fault and
tion N and standard
voltage based protection. Also thermal protection
configuration P
is used for the protection of the outgoing feeder
3
52
Cable
Δ
Y
Υ or Δ
REF615 Conf N
3
67P/51P/50P
3
50BF
67G/51G/50G
27
52
27R
25
AFD
Υ or Δ
3 1
REF615 Conf N REF615 Conf N
3
51P/50P 51P/50P
50BF 50BF
67/51G/50G 67/51G/50G
49F 79
52
AFD AFD
Overhead
line
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.
52
3
REF615 Conf P REF615 Conf N
3 3 3
67P/51P/50P 51P/50P
50BF 50BF
67N/51N/50N 67/51G/50G
27 49F
52
27R AFD
25
AFD
Cable
Δ
Y
Υ or Δ
REF615 Conf N
3
67P/51P/50P
3
50BF
67G/51G/50G
27
52
27R
25
AFD
Υ or Δ
3 1
REF615 Conf N
3
51P/50P
50BF
67/51G/50G
79
52
AFD
Overhead
line
21