What is Power Factor Correction?

There are many different types of electrical equipment which affect the electricity supply in different ways. Some electrical loads have a bad power factor, which results in higher electrical current flowing than is necessary to achieve the end result, irrespective of whether that is heating, lighting, mechanical power, ventilation, etc.

This means more generators and a heavier distribution network is required, the results of which is YOU, the user, have to pay for it all. Power Factor can be regarded as a measure of “efficiency” and has values ranging from 0 to 1, where 1 is 100% efficient.

Power Factor Correction equipment improves this “efficiency” so that less electrical current is needed to achieve the same result. A wide variety of products are available to do this, some of which operate automatically, in order to compensate for varying electrical loads, which are common in today’s manufacturing plants and offices.

What does Power Factor Correction do?

Reduces load in Cables and Switchgear, resulting in extension of their useful life and improving system reliability.

Increase the useful load from a given transformer. For example, a 1MVA transformer at 0.75 PF can only supply 750KW of load. Increasing to 0.95PF can give extra 200KW of load.

Reduces current flow and power loss in cables and transformers, etc.

Reduces Levied Charges. Using above example, 200KVA saving in chargeable load saves £300 per month on typical charge of £1.50 per KVA of maximum demand charge for supply.

Reduces PF charges, & Climate Levy charges.

Reduces the number of KWH units consumed.