Figure 1.9 shows spiral core-type transformer where the core is assembled either of a continuous strip of the transformer steel…
To determine the rise of maximum temperature of a transformer, its load test is of utmost importance. Using suitable load…
Transformer oil is a mineral (clean hydrocarbon) oil, which is obtained by refining crude petroleum. It has the following purposes:…
During no-load condition, induced voltages at the primary and secondary windings are equal to the applied voltage and secondary terminal…
Figure 1.25(a) shows the transformer during no-load condition. The flux Φ is set up in the core. When the secondary is loaded…
For an ideal transformer, we have assumed that there are no core losses and copper losses. For practical transformers, these…
Figure 1.30 shows a transformer having resistances R1 and R2 of primary and secondary windings respectively, and leakage reactances X1 and X2 of primary and secondary windings respectively.…
There are two types of windings usually used in a transformer. The winding receiving electrical energy is known as primary…
With constant voltage applied in primary, the secondary terminal voltage will decrease due to voltage drop across its internal resistance…
A transformer may be step up or step down. If the output voltage is greater than the input voltage, the…