# TrafoCalc

> Power Transformer Calculations

Canonical page: [https://chrome-stats.com/d/id6757797482](https://chrome-stats.com/d/id6757797482)

## Overview

- **ID:** `id6757797482`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Mohd Dahnial Ismail
- **Category:** Utilities
- **Version:** 1.0.1
- **Last updated:** 2026-01-25
- **First published:** 2026-01-16
- **Size:** 4.48 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/my/app/trafocalc/id6757797482)
- **Privacy policy:** [https://www.notion.so/Privacy-Policy-2e9e4615c93b807aa50fe69027de816f](https://www.notion.so/Privacy-Policy-2e9e4615c93b807aa50fe69027de816f)

## Description

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.

## Rankings

- #2,194,743 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6757797482)