Electrical Calculations
Transformer Calculations
Calculate transformer winding current and control-transformer loading.
Control Transformer Load CalculatorCompare continuous and startup control VA with transformer capacity.Transformer Current and Overcurrent Protection CalculatorCalculate winding current and review primary/secondary device limits.Transformer kVA Sizing CalculatorAdd user-selected headroom to an entered load demand and compare a selected transformer rating.Buck-Boost Transformer CalculatorEstimate correction voltage, winding current, and transformed VA for buck-boost applications.Transformer Turns Ratio CalculatorCalculate ideal winding voltage, turns, and current relationships from winding values.Transformer Tap Voltage CalculatorEstimate secondary voltage from actual supply voltage and a selected primary nameplate tap.Transformer Voltage Regulation CalculatorCalculate measured voltage regulation or estimate it from resistance, reactance, and load power factor.Transformer Efficiency and Loss CalculatorEstimate load-dependent losses, efficiency, annual loss energy, and energy cost from entered test data.Open-Delta Transformer Capacity CalculatorEstimate balanced-bank capacity for two equal transformer units in an open-delta arrangement.