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9/99
Breaker
Position
Open
Down-line
DPU1500R/2000R
Closed
Enabled Protective
Element
Open
Backup
DPU1500R/2000R
Closed
Enabled Protective
Element
shown in Figure 13-22.
Figure 13-21. Down-line and Backup Recloser Operations without ZSC
Applications Notes
79-2
79-1
Delay
Delay
(50)
(50)
(51)
(50)
(50)
website:www.abb.com/papd
ABB Distribution Protection Unit 1500R/2000R
79-3
Delay
(51)
(51)
79-4
Delay
(50 or 51)
Time
L
O
C
K
O
U
T
13-15
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