⭐ Relay IDMT Calculator

Fast. Accurate. Cross-Platform IEC Trip Time Calculation.

A modern desktop tool for electrical & protection engineers to instantly compute IEC relay inverse-time trip curves.
Clean UI. Accurate math. Windows & Linux native builds.

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⚡ Overview

Relay IDMT Calculator computes IEC inverse-time relay trip durations using official IEC mathematical models.

Designed for:

• Relay & protection engineers
• Utilities
• Industrial facilities
• Relay testing teams
• Educational institutions

The tool is completely free & open-source for noncommercial use.

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🔢 Supported IEC Curves

• IEC Normal Inverse
• IEC Very Inverse
• IEC Extremely Inverse
• IEC Long Time Inverse

Uses input parameters:

• Pickup current
• Fault current
• Time Multiplier Setting (TMS)

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🎨 Application Features

Modern Desktop UI

• Clean, compact, engineer-friendly layout
• Light & dark theme
• Error feedback
• Smart numeric parsing

Multi-Platform Native Binaries

• Windows EXE
• Linux AppImage
• Debian DEB package
• Fedora RPM package

Verified Release Pipeline

Every build is tested before publishing:

• GUI launch tests
• Install/Uninstall checks
• AppImage execution tests

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📥 Download

Get the latest version:

Releases → https://github.com/godwintgn/Relay-IDMT-Calculator/releases

Available packages:

Windows

• IDMT-Trip-Calculator.exe

Linux

• IDMT-Trip-Calculator.AppImage
• idmt-trip-calculator_x.xx_amd64.deb
• idmt-trip-calculator-x.xx-1.x86_64.rpm

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🛠 Installation

Windows

Download .exe and run.

Linux AppImage

chmod +x IDMT-Trip-Calculator.AppImage
./IDMT-Trip-Calculator.AppImage

Linux DEB

sudo dpkg -i idmt-trip-calculator*.deb

Linux RPM

sudo dnf install idmt-trip-calculator*.rpm

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👨‍💻 Developer Setup

git clone https://github.com/godwintgn/Relay-IDMT-Calculator.git
cd Relay-IDMT-Calculator
python3 -m venv venv
source venv/bin/activate
pip install -r requirements.txt

python -m idmt_tool.gui.main

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🤖 Automated Build System

A full CI/CD workflow generates:

• Windows EXE
• Linux AppImage
• Linux DEB
• Linux RPM

Each artifact is auto-tested and uploaded to GitHub Releases.

See: .github/workflows/release.yml

👤 Author

Developed by Godwin TGN.
Issues and contributions are welcome.