I need an expert's solution to the following questions in a simple manner, without too much explanation. 1-What is the difference between power transformer and distribution transformer in core losses and copper losses? 2- What is the material commonly used for construction of transformer core? Draw the B-H curve for this type of ferromagnetic material? 3- If we use in transformer core (i) solid magnetic material, or (ii) nonmagnetic material, instead of ferromagnetic material, comment on the consequences? 4- Why we adopt open delta test instead of direct loading test to calculate the efficiency of large transformers?

I need an expert's solution to the following questions in a simple manner, without too much explanation. 1-What is the difference between power transformer and distribution transformer in core losses and copper losses? 2- What is the material commonly used for construction of transformer core? Draw the B-H curve for this type of ferromagnetic material? 3- If we use in transformer core (i) solid magnetic material, or (ii) nonmagnetic material, instead of ferromagnetic material, comment on the consequences? 4- Why we adopt open delta test instead of direct loading test to calculate the efficiency of large transformers?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.11MCQ: For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the...

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1-What is the difference between power transformer and distribution transformer in core losses and copper losses? 2- What is the material commonly used for construction of transformer core? Draw the B - H curve for this type of ferromagnetic material? 3- If we use in transformer core (i) solid magnetic material, or (ii) nonmagnetic material, instead of ferromagnetic material, comment on the consequences? 4- Why we adopt open delta test instead of direct loading test to calculate the efficiency of large transformers?
A transformer has primary and secondary turns of 1250 and 125 respectively. It has core cross-sectionof 36 cm2 and its rms flux density is to be limited to 1.4 T (to prevent core saturation). Whatmaximum 50 Hz voltage can be applied on the primary side and the corresponding open-circuitsecondary voltage?The core has a mean length of 150 cm and its relative permeability can be assumed to be 8000. Whatwould be the rms exciting current when the transformer’s primary winding is excited at a voltage ascalculated above? Also calculate the magnetizing susceptance as seen from primary and secondarysides.If the transformer were to be excited at 60 Hz, 1. What should be the maximum primary voltage for thecore flux density limit not to be exceeded? 2. What would be the magnetizing susceptance as seen oneach side in this case?
Define all the losses in the transformer with the diagram and then define the hysterisis loss with thw graph.
P2-Draw the equivalent circuit of a single-phase transformer and explain how the core losses are almost invariant to the load (current). How do they depend on the terminal voltages of the transformer? Also, using the equivalent circuit explain how the copper losses depend on the load current.
If we increase the load than core loss and copper loss will... Decrease Increase Remain same
What conclusions we come up with after doing open circuit test on single phase transformer.