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Problem # 2-3/4

Problem # 2-3/4. A core-type transformer rated at 37.5 kVA, 2400 – 480 V, and 60 Hz has a core whose mean length is 1.07 m and whose cross-sectional area is 95 cm 2 . The application of rated voltage causes a magnetic field intensity of 352 A-t/m (rms), and a maximum flux density of 1.505 T.

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Problem # 2-3/4

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  1. Problem # 2-3/4 • A core-type transformer rated at 37.5 kVA, 2400 – 480 V, and 60 Hz has a core whose mean length is 1.07 m and whose cross-sectional area is 95 cm2. The application of rated voltage causes a magnetic field intensity of 352 A-t/m (rms), and a maximum flux density of 1.505 T. • Determine the number of turns in the primary and secondary. • Determine the magnetizing current when operating as a step-up transformer.

  2. l=1.07m A=95cm2

  3. Number of Turns

  4. Magnetizing Current as a Step-Up Transformer

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