Electrical Thermal Imaging Inspections

Over the last few years facility management companies are seeing the importance of electrical thermal imaging inspections for their predictive maintenance programmes.

Thermal imaging is essential in electrical predictive maintenance programs because it identifies potential faults and allows for swift inspections and one image can show you various detail unlike using a spot pyrometer where you would have to test individual fuses, this allows maintenance teams to undertake remedial works before critical asset failure.

At APT Thermal Imaging we can analyse your assets and provide you with unique easily understandable thermal imaging reports. That can be rolled out within your predictive maintenance programs. Also, also if you need help analysing the data provided within the thermal inspection report you will have your own dedicated thermographer at hand to explain everything in layman’s terms.

What types of electrical equipment can be thermal surveyed? (drop down header)

Electrical maintenance thermography can be used on a wide range of electrical equipment including:

  • Distribution boards and fuse boards
  • Switchgears and switchboards
  • Control panels
  • Busbar systems
  • Transformers
  • High voltage systems
  • Batteries
  • UPS systems

So why do I need electrical thermal imaging inspection? (drop down header) 

It’s a very cost-effective way of ensuring that your electrical system doesn’t burn out or break down. This is especially important in industries with high voltage systems and/or where continuity of power is critical to the business, e.g. data centres, banks, utility suppliers, manufacturing, hospitals.

The most common benefits are:

  • Extension of equipment/building life
  • Less plant (critical asset) down time
  • Less energy wasted through inefficient operation.
  • The ability to prioritise and better target preventive maintenance
  • The avoidance of consequential damage to plant or facilities from fires/short circuits

Can I undertake the thermal inspection on live equipment? (drop down header)

Yes, our electrical thermal imaging surveys are carried out while plant and equipment is running. There will be no interruption to electrical supplies and your operations (critical assets) will not be affected while the thermal survey is being undertaken. Our thermal inspections engineers are all certified electrical professionals with extensive experience in thermal scanning of electrical systems and undertaking a safe system of works is their top priority.

What are the main benefits of thermal imaging inspections? (drop down header)

Thermal imaging inspections can help to prevent fires, explosions, or breakdowns. It can find loose connections, overloaded and/or fatigued components, uneven voltage distribution and blockages in cooling tubes of transformers. The principal advantage over other types of testing and inspection is the ease with which components can be checked in a non-intrusive and safer way. Other benefits are normal operations can continue unabated with limited downtime and large installations with hundreds of electrical installations can be covered in a short space of time.


What types of buildings require electrical thermal inspections? (drop down header)

There are literally hundreds of different types of buildings that require thermal imaging inspections to their electrical installations, they are:

  • Office Blocks
  • Hospitals
  • Server rooms
  • Data Centres
  • Industrial Plants and facilities.
  • Warehouses & Cold Stores
  • Shops and stores
  • Backup generators and UPS Rooms

 Why use us to undertake your electrical thermal imaging inspection? (drop down header)

There is a very important and simple answer – all our thermal imaging engineers are trained to level 3, which is the highest level you can achieve as a thermographic engineer. We also use large format thermal imaging cameras; this provides you with the absolute best chance of solving any potential issues by utilising thermographic technology.

Our specification includes:

  • Level 3 thermographic certification
  • Level 3 qualified thermographers
  • Large format FLIR cameras with 45-degree lenses

As our level 3 certified electrical thermal imaging surveyors are trained to a minimum of Level 3 and use only the highest resolution thermal imaging equipment, its means we can keep further away from the danger zone. Our engineers also have a vast amount of experience in conducting this type of survey which further lowers risk.  We issue a risk assessment and method statement for each and every survey we undertake.

What’s included in your electrical thermal imaging service? (drop down header)

Our team of Level 3 certified professional Thermographers are highly experienced in carrying out thermal imaging surveys and have many years’ experience in all aspects of engineering, construction, maintenance, management, and professional survey work. Our thermal imaging equipment is some of the most accurate on the market, ensuring we pick up faults that other equipment may miss.

Our reports are professionally presented and are clear, concise, and easy to follow. We endeavour to give our clients a first class service every time.

Thermal Imaging Service

  • Supply of an ITC trained thermographer and level II reporting assessment using a large format FLIR P6n-Series (640×480 resolution) thermal imaging camera.
  • To supply an external thermographic inspection of the electrical systems, taking into account, distribution boards, fuse boards, Switchgears, switchboards, Control panels, Busbar systems and Transformers.
  • Looking for loose connections, overloaded and/or fatigued components, uneven voltage distribution and blockages in cooling tubes of transformers


  • Single report to include Introduction and fault cover pages, summary problem pages, elevation inventory,
  • Detailed fault documentation pages with possible root cause and remedial recommendation (isotherm included if using equations), baseline IR and DC image of every area (100% coverage-no isotherm)
  • Application of thermal indexing formulas
  • Eco Friendly Email Report

 Why Level 3 Thermographer’s produce reportage (drop down header)

Highly qualified thermographer’s usually produce better quality and more technically consistent inspections. Highly trained Level 3 thermal engineers have the ability to troubleshoot, calibrate equipment, interpret data, and create reports.

It also allows our engineers to develop inspection procedures and severity criteria for our clients, as well as interpreting relevant codes, and manage a client-based thermography program, including overseeing and providing training and testing, and calculating the return on investment for the program.

When you are employing a thermographer, you should check to see that they incorporate the high specifications possible for their inspections. Are they certified to Level 3 and do they use large format FLIR thermal imaging cameras?

Their specification should include:

  1. Level 3 thermographic certification
  2. Level 3 qualified thermographers
  3. Large format FLIR cameras with 45-degree lenses

 Will the thermal imaging report my satisfy insurance requirements? (drop down header)

Our thermal imaging reports have been set up to satisfy the requirements expected by insurance companies, facility managers and safety auditors. Our electrical thermographic inspection reports usually comprise of the following four sections:

  • Introduction/Report Summary – This section provides details on the survey carried out along with summary of the overall findings.
  • Main Body Report Pages – this section explains where faults/anomalies are identified, an individual report page is produced providing a description of the fault, its severity and recommended remedial action.
  • Condition Monitoring Assessment – this section provides an understanding of the current operational condition of equipment that have been reported during previous surveys – an ongoing assessment if you will.
  • Appendices – This section provide a checklist along with images of every asset inspected during the survey. This provides an auditable record of what was inspected, together with equipment health at the time of the thermographic survey.

Electrical Thermal Imaging Inspections & Reporting

We spend much a large amount of time on our reportage, that’s why it’s one of the best in the industry, this is obviously a part of the service which is off site and clients don’t see. Whilst we may draw initial conclusions on site, which may need more investigation; usually, our final conclusions and report will only be finalised after all the data has been studied. It’s our ongoing aim to provide every report that is clear and easy to reference.

If you require a electrical thermal imaging inspection our professional and certified Level 3 Thermographer’s will carry out your thermographic Inspections for all necessary standards and current regulations.

All we need are a few details such as the building address and the number of electrical installations within the building. Floor plans and would also be helpful to allow us to orientate ourselves during the inspection. We will also send across our informative checklist to help you prepare for the thermal survey.

Please contact us for more information

If you would like to contact us for more information on our thermal imaging services, please contact us on 01525 303905 or email us at info@aptsoundtesting.co.uk