Engineering calculators
Five calculators for the arithmetic that comes up in every test campaign: correcting a reading for temperature, comparing phases, sizing a battery bank, interpreting a dissolved gas analysis or converting the moisture content of an oil. They all run in your browser — no data is sent to any server — and each one states the standard it follows and the instrument that makes the actual measurement.
Insulation resistance calculator: temperature correction, PI and DAR
Correct a megohmmeter reading to 20 °C or 40 °C and calculate the polarization index (PI) and the dielectric absorption ratio (DAR) to IEEE 43.
Open the calculatorWinding resistance calculator: correction to 75 °C and phase imbalance
Correct a measured winding resistance to 75 °C, 85 °C or 20 °C and calculate the imbalance between the three phases.
Open the calculatorStationary battery calculator: sizing, autonomy and capacity test
Work out the minimum capacity your load profile demands, the estimated autonomy against a constant current and the result of a discharge test corrected for temperature.
Open the calculatorDissolved gas analysis calculator: IEC 60599 ratios and Duval triangle
Enter the chromatograph concentrations and get total combustible gas, IEEE C57.104 levels, the IEC 60599 ratios and the Duval Triangle 1 zone.
Open the calculatorMoisture in transformer oil calculator: ppm, relative saturation and saturation temperature
Convert the water content of an oil between mg/kg and relative saturation at any temperature, and find the temperature at which free water would appear.
Open the calculatorIndicative result. The calculation runs in your browser and is not sent to any server. This website may contain errors or omissions: before making any decision about an installation, the information must be checked and validated by a qualified engineer. Legal notice and terms of use