Transformer losses and its tests

Question

Accepted Answer

Transformer losses are the energy losses that occur in a transformer during its operation. Tests are conducted to measure these losses.

Transformer losses are categorized into two types: copper losses and iron losses.
Copper losses occur due to the resistance of the transformer windings and are proportional to the square of the current flowing through them.
Iron losses occur due to the magnetic properties of the core and are constant regardless of the load on the transformer.
Tests conducted to measure transformer losses include open circuit test and short circuit test.
Open circuit test is conducted to measure iron losses while short circuit test is conducted to measure copper losses.

Accepted Answer

1) Core loss Open circuits test

2) Copper loss Short Ckt test

Accepted Answer

Performance test - efficiency test,

Polarity test, Open ckt, short ckt test, dielectric test, transformer resistance test (megger)

Top Tata Power Executive Trainee Engineer interview questions & answers