I want know example of capacitive load and why we dont have inductive bank in industry?

Question

another way to increase power factor without using capacitor bank?

Answer 1

There aren't too many capacitive loads.  The classic one is a synchronous motor that is 'overexcited,' meaning that it has lots of current through its rotor windings.  Most loads are inductive, as are the wires and transformers that supply them.  That's why we generally add capacitance instead of inductance to an industrial load.  

Make sure you have the concept of power factor correct: it sounds like you've reversed something in your thinking.

Answer 2

Try this applet:

http://www.fastbytes.net/demo/power_plan...

There are two main types of loads: resistive (incandescent lights, heaters) and inductive (induction motors, fluorescent lights).

Resistive loads draw real power (W) from the source.

Inductive loads draw real power and inductive reactive power (VAR) from the source.  The real power does useful work, such as provide light or create torque to do work.  

Now, inductive reactive power is required for the loads to work (ex. creates magnetic field for induction motors), but it increases the current the source must provide.  

Fortunately, capacitive reactive power is opposite in polarity than inductive reactive power.  Simply stated, when an inductor AND a capacitor are in a circuit, the capacitor acts a source and provides reactive power to the inductor, which decreases the reactive power the source must provide.  

This is power factor correction.  We can achieve it with capacitor banks (VAR) or over-excited synchronous motors  (W & VAR) or synchronous condensers (synchronous motors driving no loads) (VAR).

If no inductive loads are on, then capacitive loads draw reactive power from the source.  This does nothing useful, so capacitive loads are typically activated when inductive loads are on.

Play with the applet and you should see how different loads effect the source.  The goal is to have MEGAVARS at 0.

To answer your question.  There are no inductive banks in industry, since they would waste power.  

Good luck...