Power Factor Correction
Specialised Power Factor Correction in South Africa for Commercial and Industrial Facilities
Power Factor Correction
Not all the electricity you draw does useful work. Correcting power factor helps your site use it more efficiently.
Not all of the electricity drawn from the supply does useful work. Motors, transformers, welding equipment and some lighting need a share of the current just to establish the magnetic fields they depend on. That share does not turn into light, heat or movement, but it still flows through cables, transformers and switchgear. Power factor is the measure of how much of the current drawn is doing useful work, and power factor correction is the process of improving it.
For a business, a poor power factor can mean a supply that is working harder than it needs to, equipment that is closer to its limits than it appears and, depending on the electricity tariff, additional charges. Correcting it is a practical, technical task that has to be matched to the way a site actually uses power.
National Electrical Services (NES) is a renowned electrical contractor in South Africa, operating in the electrical, construction and maintenance sector with offices in KwaZulu-Natal, Gauteng and the Western Cape. Its service offering includes power factor correction, alongside load profiling, energy efficiency consulting and maintenance of existing installations. Organisations looking for a reliable electrical company in South Africa can contact NES to confirm the scope and availability of support for a specific site.
For businesses in Durban, Johannesburg, Cape Town and other parts of the country, effective power factor correction begins with understanding how the site draws power and what the business wants to achieve.
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Power Factor Correction
Why Specialised Power Factor Correction Matters
Specialised power factor correction helps businesses improve energy efficiency, reduce electricity costs, and minimise unnecessary electrical losses. By optimising power usage and reducing strain on electrical infrastructure, NES Group helps ensure reliable system performance, improved equipment efficiency, and long-term operational savings.
National Electrical Services operates in the electrical, construction and maintenance sector. Its listed services include power factor correction, load profiling and energy efficiency consulting, and it has offices in KwaZulu-Natal, Gauteng and the Western Cape.
For commercial and industrial organisations, NES is a premium electrical company in South Africa to consider when looking at how a site draws power. The appropriate scope depends on the site, its equipment and its tariff. Providing details of the property, its main loads and your objectives helps the requirements to be discussed clearly.
If your organisation is comparing the best power factor correction providers in South Africa, assess each against the same criteria: experience, qualifications, use of site data, clear quotations and realistic expectations. NES can be contacted to confirm which services are available for your site.
Making Better Use of the Supply
Reduce wasted current so that more of the electricity you draw does useful work.
Understanding Tariff Implications
Where your tariff charges for poor power factor, correction can help avoid those extra charges.
Supporting Reliable Operation
Lower current means less heat and strain on cables, transformers and connected equipment.
Getting the Design Right
Equipment sized from your load profile avoids under-correction, over-correction and wasted spend.
Choosing a Contractor
How to Choose the Best Power Factor Correction Contractor?
Relevant experience
Ask whether the contractor has carried out power factor correction on comparable commercial or industrial sites.
Qualifications and authorisations
Confirm that personnel are suitably qualified and authorised to work on the electrical installation in various industries.
Site data
Ask what measurements or bills will be used to size the equipment, rather than accepting a generic solution.
Clear scope and pricing
Request a written proposal that sets out equipment, exclusions, assumptions and any additional charges.
Power Factor Correction FAQs
Find answers to common questions about NES Group’s power factor correction solutions, energy efficiency, cost savings, and how we help businesses optimise electrical performance and reliability.
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What is power factor correction?
Power factor correction improves the efficiency of an electrical system by reducing the reactive power drawn from the electricity supply, helping businesses optimise energy usage and reduce unnecessary costs.
Why is power factor correction important for businesses?
A low power factor means more current is drawn than is actually needed, which can lead to higher demand charges or penalties on your electricity account, extra losses in cables and transformers, and less spare capacity on your network. Correcting it can lower costs and ease the load on your installation.
How does power factor correction work?
Correction equipment, typically capacitor banks with an automatic controller, supplies the reactive power that motors and other inductive loads need locally. Less reactive power is then drawn from the supply, bringing the power factor closer to one.
How do I know if my facility needs power factor correction?
Common signs include a low power factor or high kVA demand charges on your bill, and heavy use of motors, compressors or other inductive equipment. A site assessment and load profile can confirm whether correction will benefit your facility.