The load factor represents the operating / duty point of a load and is defined as the ratio of the absorbed power to the rated power, i.e.

$LF = \frac{P_{abs}}{P_{rated}} \,$

Where $LF \,$ is the load factor (pu)

$P_{abs} \,$ is the absorbed power of the load (kW)
$P_{rated} \,$ is the rated power of the load (kW)