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ABB Power Factor Correction Improvement Audits

ABB Power Factor Correction Improvement Audits

Do you need to reduce your Energy Bills? Would you like more site capacity for your expansion plans?

ABB and Sentridge Control might just have the answer. We can provide a no cost audit on your own site. It takes about 1/2 day and all we ill need from you is your time and a look at your site electricity costs to discover the Power Factor charges you are currently paying.

Our survey, and an investment from you, could eliminate these Charges all together.

What is Power Factor ?


Power factor is a way of describing how efficiently electrical power is consumed. It refers to power in an alternating current (AC) electrical circuit, either for a single piece of equipment or all of the electrical equipment at a site.

The power that is drawn from the network can be described as consisting of two parts –useful power and reactive power.

Useful power is the power that equipment needs to achieve the task at hand and it is measured in kW.

Reactive power is drawn in addition to useful power by a reactive load and is measured in kVAR.
The consumption of reactive power does not contribute to achieving the task.

An electrical system’s power is composed of different parts:

  • Active (working) power which performs the useful work.
  • Reactive (non-working) power which creates the magnetic fields for inductive devices.
  • Apparent power (kVA) = Active power (kW) + Reactive power (kvar)


If your network is 100% efficient its power factor (PF) is 1 or unity. A poor PF results in additional costs for the electricity supplier. These costs are passed on to the customer as a ‘reactive power charge’ or ‘exceeded capacity charge’
All UK electricity suppliers impose a reactive penalty charge when the average PF falls below 0.95 in a month.

The causes of Poor power factor

Causes of poor PF include inductive loads equipment such as:

  • AC motors
  • Arc welders
  • Furnaces
  • Fluorescent lighting
  • Air conditioning

The more inductive loads there are on the network, then the greater possibility of a poor PF

What Is Power Factor Correction?

Power Factor Correction is  a modern technology to restore Power Factor to as close to unity as economically viable. This can be achieved by adding Power Factor Correction capacitors to the distribution system which provide or compensate for the Reactive Power demand of the inductive load, and thus reduce the burden on the supply. ABB Power are no1 in the UK providing these products.

How does it Work?

Capacitors work as reactive current generators “providing” needed reactive power (KVAr) into the power supply. By supplying their own source of reactive power, the industrial user frees the utility from having to supply it, and therefore the total amount of apparent power supplied by the utility will be less.

Power Factor Correction Capacitors reduce the total current drawn from the distribution system and subsequently increase the system’s capacity by raising the Power Factor level.


Benefits of improving Power Factor

  • Increased overall system efficiency
  • An increase in capacity using existing equipment reducing need for investment in more capacity
  • Gives the possibility to install more load or machines without the need to uprate the incoming supply, transformers, incoming network.
  • Reduction in load, Reduction in I2R losses of transformers and distribution equipment
  • Possibility of no increase in the existing Authorised Supply capacity (ASC)
  • Energy saving resulting in reduced electricity charges
  • Reduction and possible elimination of reactive charges
  • Prolonging the life of equipment from reduced heat in cables, switchgear, transformers and alternators
  • Possible reduction of Authorised Supply Capacity (ASC)
  • Reduction of transformer losses contributing to reduced Climate Levy Charges
  • Reduced voltage drop in cables, allowing the same cable to supply a larger motor and improving the starting of motors at the end of the long cable runs
  • Reduced carbon emission

Contact us today and Start Saving Tomorrow