The turns ratio of the step-down transformer...

Question 1 / 2066636eed28f7522a1c51dcb4

Question 1 of 2066636eed28f7522a1c51dcb4

The turns ratio of the step-down transformer with dual voltage secondary as shown in figure "B" of the illustration is two to one (total). If 440 volts were applied to terminals 'H1' and 'H2', what would be measured across 'X1-X3' and 'X2-X4' assuming that the secondary windings are connected in parallel? Illustration EL-0082

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🔍 Key Concepts

• Transformer turns ratio and how primary voltage relates to secondary voltage (Vp/Vs = Np/Ns). • How series vs parallel connections affect voltage and current for equal secondary windings. • For a dual secondary where the turns ratio is 2:1 total, what the voltage is across each individual secondary winding when they are in series.

💭 Think About

• If the total turns ratio is 2:1 from primary to the series-connected secondaries, what secondary voltage do you get from 440 volts on the primary? • Once you know the total series secondary voltage, what must the voltage be across each identical secondary winding? • When those two identical secondaries are instead connected in parallel, does the voltage across each parallel pair (X1-X3 and X2-X4) increase, decrease, or stay the same compared to a single winding? Why?

✅ Before You Answer

• Confirm that the 2:1 turns ratio applies to the entire secondary when in series, not to each half individually. • Be sure you’ve identified from the figure that in parallel connection, X1 is tied to X3 and X2 is tied to X4, forming two output terminals (X1-X3 as one side, X2-X4 as the other). • Verify that in a parallel connection of identical windings, voltage stays the same as a single winding, while available current (kVA) changes. Use this to choose the closest option.

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Question 1 of 20

55 volts

110 volts

220 volts

880 volts

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Question 1 / 2066636eed28f7522a1c51dcb4

Question 1 of 2066636eed28f7522a1c51dcb4

Back

Question 1 of 20

66636eed28f7522a1c51dcb4

No comments yet

Be the first to share your thoughts!

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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