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Voltage Ratio - h1011v4_49
Current Ratio

Electrical Science Volume 4 of 4
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TRANSFORMER THEORY Transformers Example 2: An iron core transformer with a primary voltage of 240 volts has 250 turns in the primary and 50 turns in the secondary.   Find the secondary voltage. Solution: VP VS NP NS Next, solve for VS. VS NS NP VP VS 50 250 240  volts VS 48  volts Example 3: A power transformer has a turns ratio of 1:4.  If the secondary coil has 5000 turns and secondary voltage is 60 volts, find the voltage ratio, VP, and NP. Solution: VR TR VR 1:4 VP VS VR 1:4 1 4 VP 1 4 VS 60 4 15  volts TR NP NS 1 4 NP 1 4 NS 5000 4 1250  turns ES-13 Page 6 Rev. 0







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