Question

While conducting open circuit test and short circuit test on a transformer, status of low-voltage and high-voltage windings will be such that in ____________

(a) OC test – h.v. open, SC test-l.v. short-circuited

(b) OC test – l.v. open, SC test-h.v. short-circuited

(c) OC test – l.v. open, SC test-l.v. short-circuited

(d) OC test – h.v. open, SC test-h.v. short-circuited

The question was posed to me during a job interview.

My doubt stems from Voltage Regulation of Transformer topic in chapter Transformers of Electrical Machines

Answer 1

The correct choice is (a) OC test – h.v. open, SC test-l.v. short-circuited

The explanation is: In conducting short circuit test, l.v. winding is short circuited. In OC test h.v. is open circuited.