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

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2.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

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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

2.Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

3.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

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

6.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?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

3.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

4.
Write two advantages of reflecting telescope over refracting telescope.

6.
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?