TrafoCalc
Power Transformer Calculations
$0.99 · Designed for iPad. Not verified for macOS.
TrafoCalc is a professional transformer calculator designed for site engineers, testers, and utility personnel.
TrafoCalc is a practical transformer calculation tool built specifically for field engineers, commissioning teams, and utility professionals.
Designed for real-world use at substations and test sites, TrafoCalc provides fast, reliable calculations without spreadsheets or manual formulas.
Key Features
• Rated current calculation (HV & LV, 3-phase)
• Transformer ratio calculation based on vector group
• Full tap-changer support (Tap 1 = highest voltage)
• Per-tap voltage and ratio calculation
• ±0.5% ratio tolerance range for testing reference
• Short-circuit current calculation
• Supports common IEC vector groups (Dyn, YNd, Yy)
• Clean, offline-ready interface
Built for Professionals
TrafoCalc follows IEC-based formulas and is suitable for:
• Factory Acceptance Tests (FAT)
• Site Acceptance Tests (SAT)
• OLTC verification
• Ratio testing reference
• Substation commissioning
No ads. No clutter. Just the calculations engineers actually need.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New vector group added, ZNyn1 and ZNyn11.
The developer, Mohd Dahnial Ismail, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mohd Dahnial Ismail
- Size
- 4.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.2 or later.
- iPhone
Requires iOS 18.2 or later. - iPad
Requires iPadOS 18.2 or later. - Mac
Requires macOS 15.2 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © dahnialb2026
