What is % Impedance in Transformer | Electrical Transformer

Transformer Rated power (KVA)

Impedance %

Up to 630

4 %

631 to 1 250

5 %

1 251 to 2 5oo

6 %

2 501 to 6 300

7 %

6 301 to 25 000

8 %

25 001 to 40 000

9 %

40 001 to 63 000

10 %

63 001 to 100 000

11 %

Above      100 000

12 %