Work out power demand for township instantly with clear inputs, formula shown and shareable results.
Connected load is what every appliance would draw if switched on together, which never happens, so a diversity factor of 0.3 to 0.5 gives the actual peak demand. Transformer capacity converts that to apparent power at the expected power factor and adds a margin for growth and for the loss of one transformer in a substation.
Peak demand
kW = households x connected load per household x (1 + commercial share) x diversity factor
Transformer capacity
MVA = peak kW / (power factor x 1000) x growth margin
Preliminary estimate only. Electrical distribution design must be carried out by a qualified engineer to the utility's planning standards.
kW = households x connected load per household x (1 + commercial share) x diversity factor. Connected load is what every appliance would draw if switched on together, which never happens, so a diversity factor of 0.3 to 0.5 gives the actual peak demand.
Because households cook, heat water and use appliances at different times. The larger the number of connections, the lower the diversity factor and the more efficient the network becomes per household.
This calculator takes 4 inputs: Number of households, Connected load per household, Demand diversity factor, Additional commercial and civic load. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.