a differential protection system with a power transformer 450MVA, 230/115kV, determine:
a. The current line on both sides of the power transformer
b. Based on these current selection for the cts from the table.
c. Set (identify) the corresponding connections of the cts.
d. Based on these connections and the flow of lines, calculate the current cts.
table 4
ct ratio turns
50:5 10
100:5 20
200:5 40
400:5 80
800:5 160
1000:5 200
2000:5 400
2500:5 500
3000:5 600