Thursday, 27 July 2023

Can Capacitor Reduce Electricity Bill


The answer for the question "Can capacitor reduce Electricity Bill ?" is No. Capacitor cannot reduce electricity bill.

Capacitor
CAPACITOR


First we have to know about the " Power Factor " to understand  why addition of capacitor won't reduce electricity.

Let us see why addition of capacity cannot reduce electricity bill below example

Example : Inputs from Single phase Energy meter reading - Power Factor 0.6, Current is 36A before the installation  of Capacitor.

Power P = V I Cos Ⲫ

              = 230 x 36 x 0.6

              = 5000 Watts

After the installation of Capacitor, Inputs from Energy meter - Power Factor is 0.8, Current is 27A

Power P = V I Cos Ⲫ

              = 230 x 27 x 0.8

              = 5000 Watts

From the above calculation, It is clear that when we improve power factor by adding capacitor the current drawn by the load reduces. Hence, the power consumed by the load will be same as before installation of capacitor.

Note

In Industries, Due to the poor power factor. It will consume more amount of current from the service provider for the same amount of power. It limits the capacity of the distribution equipment. So that the utility will impose penalty for the consumer if power factor goes below the recommended level.

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