Math Aid Math Aid

Transformers

Transformer theory and calculations.

Transformer Fundamentals 3
77Transformer Equations

Calculate Voltage, Turns, or Current on either winding (V₁/V₂ = N₁/N₂ = I₂/I₁).

Practice
78Transformer Ratio

Calculate the HV:LV Ratio, HV tap voltage, or fixed LV voltage.

Practice
79Rule of Thumb Fuse Size

Calculate Fuse Size or KVA rating for single- or three-phase transformers.

Practice
Transformer Performance 7
80Voltage Regulation

Calculate Voltage Regulation (V%), Full-Load Voltage, or No-Load Voltage.

Practice
81Efficiency

Calculate Efficiency (η), Output Power (Pout), or Input Power (Pin).

Practice
82Transformer Impedance

Calculate Impedance (Z%), Rated Voltage (V), or Short-Circuit Voltage (VSC).

Practice
83Short Circuit Current

Calculate Short Circuit Current (ISC), Impedance (Z%), or Rated Current.

Practice
84Load Sharing (Equal KVA)

Calculate Load Share (SA), Impedance (ZA), or Total Load (SL) between two parallel transformers.

Practice
85Load Sharing (Different KVA Ratings)

Rebase % impedance to a common KVA rating before sharing load.

Practice
86Losses

Calculate Losses, Input Power (Pin), or Output Power (Pout).

Practice