Transformer Losses Calculator

Calculate active and reactive power losses in transformers based on loading conditions. Uses Schneider Electric standard equations.

Transformer Data

* Required fields. Optional fields will use estimated defaults if left blank.

Results

Total Losses

Active Power (P) - kW
Reactive Power (Q) - kVAr

Breakdown

Copper Active (LWCu) - kW
Iron Active (LWFe) - kW
Copper Reactive (LVCu) - kVAr
Iron Reactive (LVFe) - kVAr

Transformer Loss Equations (Schneider Electric)

Active Losses:

P = LWCu + LWFe

LWCu = Pk × (I/In

LWFe = P0 × (V/Vn

Reactive Losses:

Q = LVCu + LVFe

LVCu = √(S×Z%)² - Pk² × (I/In

LVFe = √(S×I0%)² - P0² × (V/Vn

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