Rental energy solutions for hire companies and building professionals

# Calculate the power

NB: for single-phase load supplies, ensure that the load distribution is balanced between the 3 phases with a maximum difference of 20%

Inductive

Electric motors in general: pump, crane, grinder, circular saw, concrete mixer, etc.

Power coefficient
x 1.6

For example

For an electric motor developing 100 kWe:
100 Kwe x 1.6 = 160 Kwe power required
160 Kwe/0,8 = 200 kVA power required

As the operation of a generating set is optimised at 75%:
200 / 0.75
= a 275 kVA generating set

Resistive

Thermal resistance: heating, incandescent lamp, lighting, etc.

Power coefficient
x 1

For example

For an electric heating network with a total power of 100 kWe:
100 Kwe x 1 = 100 Kwe power required
100 Kwe = a 125 kVA generating set

As the operation of a generating set is optimised at 75%:
125 / 0.75
= a 165 kVA generating set

Capacitive

Load compensated by a capacitor: capacitor discharge lamps, electronic equipment, UPS, sound amplifying devices

Power coefficient
Convert to kVA and calculate the average Cos Phi of the installation

For example

For 100 kWe sound amplification with an average Cos Phi of 0.6, divide the kWe load by the Cos Phi to obtain the necessary power in kVA

As the operation of a generating set is optimised at 75%:
166 / 0.75
= a 220 kVA generating set

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