For the protection of transformer using differential protection scheme, which of the following pair is true?
| Power Transformer | Current Transformer | |
| Pair 1 | Star-Delta | Star-Delta |
| Pair 2 | Delta- Star | Delta-Star |
| Pair 3 | Star-Delta | Delta-Star |
| Pair 4 | Star-star | Star- Star |
1
Pair 1
2
Pair 4
3
Pair 3
4
Pair 2
5
Question Not Attempted