Overall dimensions - Design of Transformers

The main dimensions of the transformer are (i) Height of window(Hw) (ii) Width of the window(Ww)

Overall dimensions

 The main dimensions of the transformer are

(i) Height of window(Hw)

(ii)Width of the window(Ww)

The other important dimensions of the transformer are

 (i) width of largest stamping(a)

 (ii)diameter of circumscribing circle

 As the iron area of the leg Ai and the window area Aw = (height of the window Hw x Width of the window Ww) increases the size of the transformer also increases. The size of the transformer increases as the output of the transformer increases.

1. Output-kVA

 2. Voltage-V1/V2 with or without tap changers and tapings

 3. Frequency-f Hz

 4. Number of phases – One or three

 5.Rating – Continuous or short time

 6.Cooling – Natural or forced

 7. Type – Core or shell, power or distribution

 8.Type of winding connection in case of 3 phase transformers – star-star, star-delta, delta-delta, delta-star with or without grounded neutral

 9.Efficiency, per unit impedance, location (i.e., indoor, pole or platform mounting etc.), temperature rise etc.,