Three Phase Transformer Calculator

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This tutorial provides an overview of three-phase transformers and associated calculations. It explains the concept of three-phase transformers, the calculations involved in determining volts based on kVA and amps, and their relevance in electrical engineering. Real-life applications, key individuals, and interesting facts are also discussed

This tutorial aims to provide an understanding of three-phase transformers and associated calculations for determining volts based on kVA and amps. Three-phase transformers are vital components in electrical power systems, providing efficient and reliable power distribution. This tutorial will introduce the concept of three-phase transformers, discuss the calculations involved, their relevance in electrical engineering, real-life applications, key individuals in the discipline, and interesting facts related to three-phase transformers.

Three Phase Transformer Calculator
To find
Transformer Capacity Calculator Results
Volt =
kVA =
Amps =

Example Formula

The formula to calculate the volts based on kVA and amps for a three-phase transformer is as follows:

Volts = (kVA × 1000) / (√3 × Amps)


  • Volts: Voltage output of the three-phase transformer.
  • kVA: Apparent power in kilovolt-amperes (kVA).
  • Amps: Current in amperes (A).
  • √3: Square root of 3 (approximately 1.732).

Who wrote/refined the formula

The formulas used for calculating the volts based on kVA and amps for three-phase transformers have been derived and refined over time by electrical engineers, researchers, and practitioners in the field of power systems and electrical engineering. These formulas have been extensively used and validated in practical applications.

Real-Life Application in Industry

Three-phase transformers are widely used in various industries for efficient power distribution. They are commonly employed in electrical substations, industrial plants, commercial buildings, and utility systems. These transformers play a crucial role in stepping up or stepping down voltages to meet specific requirements for machinery, equipment, and electrical systems.

Interesting Facts

- Three-phase transformers are essential components in power grids, enabling the efficient transmission and distribution of electricity over long distances.

- The invention and widespread adoption of three-phase transformers revolutionized the electrical industry, facilitating the growth of industrialization and the development of modern cities.

- Three-phase transformers are designed to handle higher power levels compared to single-phase transformers, making them suitable for heavy-duty applications in industries such as manufacturing, mining, and utilities.


Three-phase transformers are critical components in electrical power systems, enabling efficient power distribution and voltage transformation. Understanding the calculations associated with determining volts based on kVA and amps is essential for proper transformer sizing and system design. By applying the formulas and principles discussed in this tutorial, engineers can ensure reliable and optimal performance of three-phase transformer installations in various industries and applications.