Correct option is D
Three-part tariff is not a type of power factor tariff:
Power factor tariff
A type of electricity tariff that considers the power factor of the consumer's load. Some types of power factor tariffs include:
kVA Maximum Demand Tariff: A modified two-part tariff where fixed charges are based on maximum demand in kVA. Consumers with low power factors pay more towards fixed charges.
Sliding Scale Tariff: Also known as the average power factor tariff, this tariff uses an average power factor as a reference. If the consumer's power factor is below the reference, they pay additional charges. If the power factor is above the reference, the consumer receives a discount.
kW and kVAR Tariff: This tariff charges both active power (kW) and reactive power (kVAR) separately. Consumers with low power factors draw more reactive power and pay more charges.
Three-part tariff
A tariff where the total charge is split into three parts. It's usually used for bulk supplies.
