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Transformer - Secondary Fault
Calculate a transformer secondary three-phase fault current using an infinite or known fault level on the primary.

Photovoltaic (PV)

Array - Design Voltage & Current
Calculate the design current and voltage for a PV array in accordance with the IET Code Of Practice for Grid Connected Solar Photovoltaic Systems.


Power - DC
Calculate DC power [voltage, current, power].
Power - AC
Calculate AC single-phase and three-phase complex power [voltage, current, power factor, apparent power, real power, reactive power].


Resistance - Area & Length 20°C
Calculate resistance at 20°C given the material, length, and cross-sectional area.
Resistance - Area & Length @ T°C
Calculate resistance using the material, length, and cross-sectional area at a given temperature.
Resistance Temperature Change
This calculator computes the final resistance due to temperature change applied to a reference resistance and temperature.

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