Power generation and power distribution

It is in the best interest of power stations and utility companies to ensure that no interruptions occur, from the energy generation process through to distribution. Testo thermal imagers maintain the integrity of electrical and mechanical components as part of this preventive maintenance. Non-destructive thermographic testing can reduce costly system malfunctions or downtimes.

It is absolutely essential to prevent energy distribution systems from malfunctioning due to the far-reaching consequences. Faulty connections on high-voltage masts can be particularly critical here.
With thermal imagers, you can check out temperature increases non-contact and from a safe distance: without putting yourself at risk and without having to switch off the high-voltage system.

Power distribution systems

Thermographic inspection – to ensure smooth operation

Thermal image power distribution system
Thermal image power distribution system

Energy distributor malfunctions or failures can pose a serious risk to the security of supply. Signs of wear, material fatigue or cable breakages on the high-voltage lines are often the cause. These are often preceded by temperature increases due to increased resistance.

By detecting these anomalies at an early stage using thermography, damage to components and the threat of power failures in high-voltage systems can be prevented simply and efficiently. Power distribution is therefore guaranteed on a long-term basis.

  • Assess heating on disconnectors and circuit breakers from a safe distance
  • Non-contact inspection of transformers, insulators and screw connections
  • Precisely identify material fatigue and cable ruptures


testo 890 brochure

Thermography for the highest demands.

Application example high-voltage

Testing high-voltage plants with thermal imagers from Testo.

Application example distant objects

Thermography of distant objects.

Best image quality and interchangeable lenses.

With the testo 890, you won’t miss a thing. Thanks to manual focus, every thermal image is razor-sharp, and with the exchangeable lenses, you can ensure supply and plant safety easily and efficiently, even from greater distances.

testo 890 thermal imager with best image quality

The testo 890 thermal imager features an impressive infrared resolution of 640 x 480 pixels – which can even be expanded to 1280 x 960 pixels with the built-in testo SuperResolution technology. In addition, you always have full control over the thermal image thanks to the manual focus.

The testo 890 thermal imager with manual focus and interchangeable lenses

Thanks to manual focus, you always have full control - and 100% sharp thermal images. With the telephoto lens, even the smallest thermal anomalies on high-voltage lines can be detected reliably and efficiently from a greater distance.
FOV calculator for Testo thermal imagers

FOV calculator for Testo thermal imagers

Use the FOV calculator to check out the advantages offered by the testo 890 thermal imager in combination with the various lenses yourself. The FOV calculator shows you quickly and easily just how small the measurement object can be in order to be detected (IFOV geo) and reliably measured (IFOV meas) at the selected distance. Try it out for yourself [here] and put together the kit that is right for you.

Power generation

Maintenance of mechanical components

Power generation
Thermal image power generation

Heat generation in mechanical components in power-generating plants may indicate an elevated level of stress. This is caused, for example, by friction, faulty alignment, component tolerances or a lack of lubricant.

The main advantage of infrared measurement: it is non-contact and can therefore be carried out during operation and from a safe distance.

Maintenance of electrical installations

Electrical installation
Thermal image electrical

Testo thermal imagers facilitate evaluation of the heat status of low, medium and high-voltage systems. Thermographic images lead to the early detection of defective components or connections, so that the necessary preventive measures can be introduced in a targeted way.

This minimises dangerous fire risks and avoids costly production downtimes for energy producers.

Further advantages of the testo 890 thermal imager

Fold-out display and rotatable handle

Fold-out display and rotatable handle
The rotatable, fold-out display and the ergonomic rotatable handle allow measurements in difficult-to-access places.

Exchangeable lenses for outstanding images

Exchangeable lenses
  • Standard lens: Ideal for close-up measurement objects, offering a good overview thanks to a large image section
  • 25° x 19° lens: Ideal for use in preventive maintenance in the low-voltage sector
  • Telephoto lens: Suitable for medium and long distances

Super-telephoto lens

Super-telephoto lens

6.6° x 5° super-telephoto lens:

  • Small field of view (5° x 3.7°) for maximum resolution
  • Particularly suitable for measurements on objects that are far away, e.g. power lines
  • Easy to handle: no additional lens holder needed

testo IRSoft professional software

Use the testo IRSoft report wizard to generate professional reports quickly and easily – or use the software’s report designer to create customized templates to suit your own personal requirements. The software can be downloaded free of charge and without a licence.

Keeping limit values safely in view

Hotspot function
The hotspot function immediately displays the hottest spot in the image. In addition, points that exceed defined limits can be highlighted in colour using the alarm function.

Automatic measurement location recognition

The testo SiteRecognition technology guarantees fully automatic site recognition, as well as storage and management of the thermal images. This rules out any mix-ups, prevents errors during evaluation and saves time by eliminating the need for manual image assignment.