A Delta/Delta connected transformer is connected to V/V connected transformer.

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Question: A Δ/Δ connected transformer is connected to V/V connected transformer. Find the ratio of the VA rating of the V/V connected transformer and Δ/Δ connected transformer.

Solution: For a Δ/Δ connected transformer, the line voltage is the same as the phase voltage.

Let the line voltage be V_L.

For a V/V connected transformer, the line voltage is √3 times the phase voltage.

Let the line voltage be √3V_L.

The product of voltage and current gives the power rating of a transformer. Since the current in a transformer's primary and secondary windings is the same, the VA rating is proportional to the voltage rating. Thus, power formula in physics can be written as: $P = V\times I $

Therefore, the ratio of the VA rating of the V/V connected transformer to the Δ/Δ connected transformer is: (√3V_L / V_L) = √3

Hence, the VA rating of the V/V connected transformer is √3 times the VA rating of the Δ/Δ connected transformer.

Previous Years’ Questions

Also read:

Relevant Concepts
Power Transformers	Magnetic Induction Formula	Uses of Transformers
Induced Electromotive Force and Current	Types of Circuits	Ohm's Law

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A Delta/Delta connected transformer is connected to V/V connected transformer.

Previous Years’ Questions

CBSE CLASS XII Related Questions

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Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.
The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

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Write two advantages of reflecting telescope over refracting telescope.

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A Delta/Delta connected transformer is connected to V/V connected transformer.

Previous Years’ Questions

CBSE CLASS XII Related Questions

1.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5. The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

6.Write two advantages of reflecting telescope over refracting telescope.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

5.
The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

6.
Write two advantages of reflecting telescope over refracting telescope.