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?

Rework Problem 3.14 if the transformer is delivering rated load at rated secondary voltage and at (a) unity power factor, (b) 0.8 power factor leading. Compare the results with those of Problem 3.14. -

For an ideal 2-winding transformer, the ampere-turns of the primary winding, N1I1 is equal to the ampere-turns of the secondary winding, N2I2 (a) True (b) False

With the American Standard notation, in either a Y-or-Y transformer, positive- sequen quantities on the high-voltage side shall lead their corresponding quantities on the low-voltage side by 30. (a) True (b) False

A small single-phase 60 Hz transformer has 10.2 W at no load. The core has a volume of 750 cm3. The maximum flux density is 10,000 G and the hysteresis constant of the core is 0.0005. Using the Steinmetz law on hysteresis loss, find the eddy current loss.

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?

talk about coreless transformer

A transformer core is laminated in order to ....................................? (A) reduce hysteresis loss and eddy current loss (B) reduce only hysteresis loss (C) reduce copper loss (D) reduce all of the above losses (E) None of the above.

Only detailed description and complete answer is required.

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?