Transformer Design, Sizing, Selection and Calculation

Electrical Engineering Academy: Transformer Design Engineering with Practical Examples

After completion of this course:

What you’ll learn

  • Transformer Design Overview & Purpose of Selection.
  • Important Codes & Standards.
  • Types of Transformer.
  • Transformer Tank, Winding & Oil.
  • Pre & Post Order Stage Documents.
  • Inspection & Test Plan.
  • Transformer Design: Sizing, Selection and Calculation.
  • Datasheet for Vendor.

Course Content

  • Introduction –> 12 lectures • 41min.
  • Transformer Sizing Calculation –> 1 lecture • 25min.

Transformer Design, Sizing, Selection and Calculation


  • ITI, Degree or Diploma in Electrical Engineering.
  • Scientific Calculator.
  • Excel and Word.

After completion of this course:

  • Engineers will be able to work on EPC and MEP Sector
  • Will be able to design of Substation / Switch Yard
  • Will be able to do the calculation for HV/ LV and MV
  • Will be able to work for offer evaluation

Transformer Design Engineering Course

1- Overview

2- Purpose of Selection

3- Important Codes & Standards

4- Types of Transformer

a. Oil Type

b. Dry Type

5- Transformer Tank

6- Transformer Core

7- Transformer Winding

8- Transformer Oil

9- Main Tank Conservator

10- Transformer Marshalling Box

11- Pre Order Stage Documents

12- Post Order Stage Documents

13- Inspection and Test Plan

· Routine Test

a. Measurement of winding resistance

b. Measurement of voltage ratio and check of phase displacement

c. Measurement of short-circuit impedance and load loss

d. Measurement of no-load loss and current

e. Dielectric tests

f. Separate source AC withstand voltage test

g. Induced AC voltage test

h. Partial-discharge measurement

i. Tests on on-load tap-changers

· Type Test:

j. Temperature-rise test

k. Lightning-Impulse tests

· Special Tests :

l. Switching impulse voltage test

m. Measurement of dissipation factor (tan ) and capacitance

n. Measurement of zero sequence impedance(s)

o. Determination of sound level

p. Measurement of harmonics of the no-load current

q. Measurement of insulation resistance

14- Transformer : Sizing and Selection

15- Transformer Design Calculation

a. Calculation Basis

b. Data & Load

c. Formula Used

d. Results

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