Three-Phase Circuit Calculation Software

Theoretical Fundamentals of Electrical Engineering. Fundamentals of Circuit Theory.
Three-phase electrical circuit calculation. Complex number method. Plotting phasor diagrams
Three Phase Circuits 3.55
Three Phase Circuits 3.55 (TPC 3.55) is designed for the calculation of three-phase electrical circuits in any configuration, including Y/Y, Y/Δ, Δ/Y, and Δ/Δ. The software generates a detailed step-by-step solution with a report exportable to MS Word.
The built-in utilities in TPC 3.55 allow users to:
  • Calculate complex line and phase impedances;
  • Plot voltage and current phasor diagrams.
Settings in TPC 3.55 enable the display of circuit element symbols in compliance with both regional and international standards, such as IEC and ISO. To facilitate diagram construction, TPC 3.55 features a built-in phasor editor with a wide range of capabilities and an intuitive interface.


  • TPC Versions

    Демоверсия программы Бесплатна, но имеет следующие функциональные ограничения:
    1) Полный расчет выполняется только для трехфазных цепей с активной симметричной нагрузкой.
    2) Неполный расчет - для всех остальных трехфазных цепей.
    Предоставляются результаты расчета основных параметров: комплексы фазных и линейных токов, комплексы фазных и линейных напряжений, комплекс полной мощности в нагрузке, комплекс полной мощности трехфазной системы.

    Лицензионная версия Выполняет полный подробный расчет для всех типов трехфазных цепей с любым типом нагрузки, а также аварийных режимов работы таких как: короткое замыкание в фазах, обрывы линейного провода.
    Для использования лицензионной версии необходимо приобрести код активации (лицензионный ключ). Код активации действует в течении двух месяцев. Лицензионная версия работает только при наличии соединения с интернетом. Это необходимо для проверки текущей даты, так как код активации имеет временные ограничения.
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  • Benefits of TPC

    • TPC is an educational program designed to help you quickly master the methods of three-phase electrical circuit calculation.
    • TPC generates a detailed, step-by-step calculation of a three-phase circuit, computing all key parameters:
    1. Line and phase currents;
    2. Line and phase voltages;
    3. Load phase power and total power;
    4. Reports are generated in MS Word format.
    • TPC includes built in utilities for:
    1. Calculating line/phase impedances;
    2. Constructing phasor diagrams with extensive customization options.
    • TPC creates reports in .docx format, ensuring compatibility with popular editors such as MS Word, OpenOffice Writer, WPS Writer, and Google Docs.
    • TPC maximizes time efficiency when formatting calculation documents and reports.
    • TPC assists students in preparing for lab defense, assignments, and electrical engineering exams.
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  • TPC System Requirements

    TPC 3.55 is designed for Windows. Microsoft Word is used to display step-by-step calculations. The supported versions of Windows and MS Word for TPC 3.50 are listed below.
    Operating System:
    Windows 7, 8, 10, 11
    Text Editor:
    Microsoft Word 2007, 2010, 2013, 2016, 2021, 2024
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    Download and activate Three Phase Circuits (TPC 3.55):

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    Download TPC 3.55


    Activation TPC 3.55

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    Help & Resources

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    Tutorial videos on using the program.


    Three-phase circuit calculation in TPC 3.55

    Three-phase star-star circuit calculation in TPC 3.55


    Three-phase star-delta circuit calculation in TPC 3.55

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Download test models of three-phase circuits and check your calculations

We have developed virtual models of three-phase circuits with the following configurations: Y/Y, Y/Δ, Δ/Y, Δ/Δ, which contain virtual instruments for measuring key parameters in real time.


Download NI Multisim three-phase circuit models

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