In figure "4" of the diagram in the...

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Question 1 of 2066636eed28f7522a1c51d54a

In figure "4" of the diagram in the illustration, the three-phase step-down power transformer has a turns ratio of five to one. If a three-phase 4160 volt supply is connected to terminals "A1-B1-C1", what voltage should develop across terminals "A2-B2-C2"? Illustration EL-0084

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Question 1 of 20

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🔍 Key Concepts

• Three-phase transformer turns ratio and how it applies to primary vs. secondary voltage • Recognizing from the Figure 4 diagram whether the windings are connected in delta or wye on primary and secondary • Relationship between line voltage and phase voltage in wye and delta systems (√3 factor)

💭 Think About

• From the 5:1 turns ratio, what is the new phase voltage on each secondary winding if 4160 V line is applied to the primary? • Based on the Figure 4 connections, is the secondary line voltage equal to the secondary phase voltage, or is it phase voltage multiplied by √3? • Compare your calculated secondary line voltage with the answer choices and see which one is closest to your computed value.

✅ Before You Answer

• Verify what the 4160 V represents: is it line-to-line voltage or line-to-neutral? • Confirm from the drawing whether the secondary is connected in delta or in wye, since this changes the relation between phase and line voltages. • After using the 5:1 ratio on the proper voltage (phase vs line), double-check your math, especially any √3 (≈1.732) factor you may need to apply.

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