Potência Trifásica
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
trifásico
About this calculator
The Trifase Power Calculator is a useful tool to calculate the power of a three-phase system. Based on the formula P = √3·V·I·cosφ, this calculator allows you to determine the power in watts (W) with precision.
This calculator is designed for use in construction projects, especially in advanced electrical systems. It is essential to keep in mind that three-phase power is calculated considering the magnitude of the current and voltage, as well as the relationship between them, represented by cosφ (power factor).
It is recommended to use this calculator when working with three-phase electrical systems, such as three-phase motors or three-phase transformers. Additionally, it is crucial to carefully consider the formula and input values to ensure accurate and safe results.
Common precautions when using this calculator include ensuring that current and voltage values are expressed in compatible units and that the power factor is considered correctly. Furthermore, it is essential to remember that the calculated power is a theoretical measurement and may vary depending on the actual operating conditions of the system.
Frequently asked questions
What is the formula P = √3·V·I·cosφ?
This formula is used to calculate three-phase power, considering the magnitude of the current (I), voltage (V) and power factor (cosφ).
Why is it important to consider the power factor?
The power factor (cosφ) represents the relationship between current and voltage in an electrical system and is crucial for calculating three-phase power with precision.
Can I use this calculator for two-phase systems?
No, this calculator is designed for three-phase systems. For two-phase systems, you need to use a different calculator.
What should I do if I am working with unknown current or voltage values?
In this case, it is recommended to consult an electrical expert or use a calculator that allows the entry of unknown values.
Is this calculator safe to use?
Yes, this calculator is designed for safe use. However, it is essential to carefully consider the formula and input values to ensure accurate and safe results.