TrafoCalc

About: TrafoCalc

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.