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TERMINAL OBJECTIVE - h1011v4_43
Turns Ratio

Electrical Science Volume 4 of 4
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Transformers TRANSFORMER THEORY TRANSFORMER THEORY Transformers  are  used  extensively  for  AC  power  transmissions  and  for  various control  and  indication  circuits.    Knowledge  of  the  basic  theory  of  how  these components  operate  is  necessary  to  understand  the  role  transformers  play  in today’s nuclear facilities. EO 1.1 DEFINE   the   following   terms   as   they   pertain   to transformers: a. Mutual induction b. Turns ratio c. Impedance ratio d. Efficiency EO 1.2 DESCRIBE  the  differences  between  a  wye-connected and delta-connected transformer. EO 1.3 Given  the  type  of  connection  and  turns  ratios  for  the primary and secondary of a transformer, CALCULATE voltage,  current,  and  power  for  each  of  the  following types: a. D - D b. D - Y c. Y - D d. Y - Y Mutual Induction If flux lines from the expanding and contracting magnetic field of one coil cut the windings of another nearby coil, a voltage will be induced in that coil.  The inducing of an EMF in a coil by magnetic  flux  lines  generated  in  another  coil  is  called  mutual  induction.    The  amount  of electromotive force (EMF) that is induced depends on the relative positions of the two coils. Rev. 0 Page 1 ES-13







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