IEC 60076 / AS/NZS 60076

Transformer Calculator

Calculate transformer full-load currents, turns ratio, impedance, losses, and voltage regulation.

Transformer Specifications

Typical: 5-15 for distribution transformers
From nameplate or leave blank for estimate
Copper losses at full load

Results

Primary Full-Load Current
I (Primary)
Unit A
Secondary Full-Load Current
I (Secondary)
Unit A
Turns Ratio
n (Vp / Vs)
Impedance Components
%Z
%R
%X
Impedance (Ω) on Secondary Side
Z (ohms)
R (ohms)
X (ohms)
Performance Metrics
Voltage Regulation (%)
Efficiency at Full Load (%)
No-Load Losses (W)
Load Losses at Full Load (W)

Calculation Steps

Step Description Formula / Result
1 Convert rating to VA
2 Calculate primary FLC
3 Calculate secondary FLC
4 Calculate turns ratio
5 Decompose impedance components
6 Calculate base impedance
7 Calculate impedance in ohms
8 Calculate voltage regulation
9 Estimate/use provided losses
10 Calculate efficiency