# Open Circuit and Short Circuit Test on Transformer

0
873

### Open Circuit and Short Circuit Test on Transformer

We conduct open circuit and short circuit test on single phase transformer to determine the efficiency and regulation of a transformer on any load condition and at any power factor.Open circuit & short circuit test are also called as OC test & SC test on the transformer.This method of finding the parameters of a transformer is called as an indirect loading method.

### Procedure of Open Circuit(OC) Test ### Procedure of Short Circuit (OC) Test ### Calculation of Efficiency of transformer from O.C. and S.C. Tests

#### Percentage voltage regulation, %R = ((E2 – V2)/ V2 )×100 The expression of voltage regulation in terms voltage drops is given as %R = ((I1R01 cos Φ +/- I1X01 sin Φ) / V1) ×100 Or %R = ((I2R02 cos Φ +/- I2X02 sin Φ) / V2) ×100 The above two equations are used based on the parameters are referred to primary or secondary sides. Hence, from the SC test data, we can find out the regulation of a transformer. The positive sign is used for lagging power factor and the negative sign is used for leading power factor.

READ HERE  What is the strange substance that the explorers found in the Algerian desert?