THE POWER WHICH REAL UTILISATION OF THE MOTOR R OTHER 
EQUIPMENT CALLED AS ACTIVE POWER.BUT THE POWER CONSIDERING 
WITH LOSSES LIKE IRON LOSS,CU LOSS,FRICTION LOSS WEAR TEAR 
LOSS COMBINING THIS LOSSES WITH THE ACTIVE POWER CALLED AS 
REACTIVE POWER,ITS  SIMPLY SAY THE POWER DELEVARED IN THE 
OUTPUT...
IT CAN CONTROL BY AVOIDING ALL THIS LOSSES

We could define the reactive power if we how it generates 
as follow.
All inductive (i.e. electromagnetic) machines and devices 
that operate on AC systems convert electrical energy from 
the power system generators into mechanical work and heat. 
This energy is measured by kWh meters, and is referred to 
as “active” or “wattful” energy. In order to perform this 
conversion, magnetic fields have to be established in the 
machines, and these fields are associated with another form 
of energy to be supplied from the power system, known 
as “reactive” or “wattless” energy.

We can control the power factor by switch on and off the 
capacitor. Reactive power is nothing but capacitive power. 
by using capacitive power continuosly the winding, core 
gets heat and it will damage the equipment.  
KVA= KW+KVAr

KVA---- Apparent Power
KW----- Active Power
KVAR--- Reactive Power

Reactive Power is full of losses. If we use any electrical 
equipment automatically reactive power obtained due to core 
losses and iron losses