Transformers TRANSFORMER THEORYTRANSFORMER THEORYTransformers are used extensively for AC power transmissions and for variouscontrol and indication circuits. Knowledge of the basic theory of how thesecomponents operate is necessary to understand the role transformers play intoday’s nuclear facilities.EO 1.1 DEFINE the following terms as they pertain totransformers:a. Mutual inductionb. Turns ratioc. Impedance ratiod. EfficiencyEO 1.2 DESCRIBE the differences between a wye-connectedand delta-connected transformer.EO 1.3 Given the type of connection and turns ratios for theprimary and secondary of a transformer, CALCULATEvoltage, current, and power for each of the followingtypes:a.D - Db.D - Yc. Y - Dd. Y - YMutualInductionIf flux lines from the expanding and contracting magnetic field of one coil cut the windings ofanother nearby coil, a voltage will be induced in that coil. The inducing of an EMF in a coil bymagnetic flux lines generated in another coil is called mutual induction. The amount ofelectromotive force (EMF) that is induced depends on the relative positions of the two coils.Rev. 0 Page 1 ES-13
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