### Basic Energy Concepts

Active power (Kw.) Power demanded by a receiver or group of receivers, which is transformed into work or heat.

Apparent power (KVA) Real value demanded to the network and the vector sum of both active and reactive powers. It is important to point out that this is the real energy generated and transported by the transport and distribution lines.

Time lag between Active Power and Apparent Power or Cosine φ

Also called power factor, it is the existing relationship between Active Power and Apparent Power, or the cosine of the angle formed by intensity and voltage phasors, designated in this case as cosφ, being φ the value of said angle.

According to the power triangle graphic

We can see the explained concepts as well as the formulas for its calculation.

Reactive power (Kvar) reactive power is that one used by certain receivers to create electric and magnetic fields (such as motors, transformers, reactors, etc.).

This power does not convert to useful work, increases the total power to be transported and distributed by the suppliers companies, as well as the distribution losses.

Contracted power (Kw) Contractual active power value requested to the distributor.

Power consumed (Kw) Real value of active power consumed. It can be higher or lower than the value of the contracted power.

Efficient power (Kw) Optimized power once the measures adopted for the efficiency plan have been implemented.

Active energy (Kw /h) Active power consumed per unit of time.

Reactive energy (Kvar/h) Reactive power consumed per unit of time.