Circuit breaker interview questions and answers are very important in view of job interview. We shall discuss in detail the questions in this post. What is a Circuit Breaker? The circuit breaker is a device which opens and close the circuit under normal and fault condition. What is making current of circuit breaker? Making current … Read more
Transformer Interview Questions & Answers Part-4: In this section we shall discuss more questions on transformer. Why is flux constant in transformer? The net MMF in the primary remains constant. When load increases, the secondary MMF(N2I2) reflects in the primary side, which is just opposite to the primary flux. Thus net flux in the primary … Read more
What is the definition of Transformer? What is a transformer? A transformer is a static piece of electrical equipment which transform the voltage from one level to another without altering the frequency. The power equation of the transformer is ; Primary side power = Transformer losses + secondary side power The transformer losses are negligible … Read more
What is “voltage regulation” in a transformer? Voltage regulation of transformer is defined as the percentage change in the transformer secondary voltage from no load to full load. In other words, the transformer voltage regulation describes the ability of the transformer to provide the constant voltage from no load to full load. The secondary voltage of … Read more
What is BDV Test of transformer oil? The transformer oil is used in the transformer for insulation as well as for cooling purpose. The different insulating materials have different dielectric strength. The insulating material should sustain the voltage up to its dielectric strength. If the voltage is increased above the specified dielectric strength of the … Read more