SOLUTION

Generally industrial loads include inductive motor coil,

• Industrial wiring systems are very inductive because they contain many inductive machines and circuits., such as electric motors, transformers, welding plants, and discharge lighting.
• The inductive nature of the industrial load causes the current to lag behind the voltage and creates a lagging power factor.
• The power factor is the percentage of current in an alternating current circuit that can be used as energy for the intended purpose. A power factor of say 0.7 indicates that 70% of the current supplied is usefully employed by the industrial equipment.
• An inductive circuit, such as that produced by an electric motor, induces an electromagnetic force that opposes the applied voltage and causes the current wave to lag the voltage wave, therefore, they have a lagging power factor.