Thermography of electrical systems

Neglect the inspection obligations of electrical systems can have serious consequences: a labour- and cost-intensive plant shutdown is only on of the possible consequences. Electricity is the commonly cause of fire! We support you to comply with your annual inspection obligations. SYSWE is certified after DIN VDE 0105 from the VdS to execute this inspection of mobile and stationary equipment.

Overheating of an electrical system
Overheating of an electrical system

With our thermographic camera of the type FLIR P 620 we check all your electrical systems for failures of interconnection, local overheating and age-related abrasion. Low voltage systems as well as medium- and high-voltage systems can be checked.

A thermographic check of your electrical system has many advantages for the plant operator:

  • Increased safety for persons and environment
  • Enhancement of technical reliability of the system

  • Fast and easy inspection of the system while continous operation

  • Verification of the inspection obligation in case of damage for the insurance

Ask for our quotation for the annual periodic inspection!

Thermographic camera

The thermographic camera is able to picture thermal radiation at electrical systems which is invisible for the human eye. It reacts sensitive to the long-wave infrared radiation.

Every object emits thermal radiation. Thermal radiation is electromagnetic radiation taht owns different characteristic spectra. One part of this radiation is infrared radiation, thus wavelenghts from 780nm to 1mm.

Conspicuities at electro thermography

Thermography at elecrical systems can illustrate defects, that mostly can’t be seen with the naked eye. In the following you can see some examples of defects in electrical systems, which were detected with the thermographic camera.

Defective busbar connection of a 6kV separator

Defective connection at the bushing of a medium voltage installation

Conspicuous connection at an electric contactor

Thermographical abnormality at a NH-fuse switch disconnector

Dangerous thermal conspicuity at connection point of a power contactor

Transformer secondary side defective busbar connection L1

Control transformer with defective connection compartment

Neozed fuse block – faulty upper fuse contact

Inspection report for electro thermography

After the thermography of your electrical installations, you get an inspection report. The structure and content are defined by VdS 2860.

Content of the inspection report after VdS 2860:

  • Front page
  • List of inspected facilities with comments
  • Appendix each 1 site per thermal conspicuity

Front page

The front page of the inspection report contains all fundamental information regarding the thermography:

  • Address of the inspected object
  • Date of the inspection

  • Type of business
  • Plant utilization (full load, partial load)
  • Purchaser
  • Information about the thermographer
  • Result of the inspection

List of the inspected facilities

The list of the inspected facilities contains the following information:

  • Sequential number
  • Inspected facility

  • Result (without thermal conspicuity, thermal conspicuity, dangerous thermal conspicuity)
  • Comment/ plant description (e.g. sub-distribution)

Appendix for thermal conspicuities

If a thermal conspicuity is detected while the electro thermography, the inspection report have to contain an appendix, one page for each conspicuity. In this appendix the conspicuity is illustrated and described. There are details about the facility and whose denomination, where the conspicuity was found. Furthermore the kind of component and the name of it are stated. Besides the thermogram and a colour picture of the affected component, there are also information about the operating state while the inspection, the measured temperatures and the temperature difference as well as a proposal for solution. Also the error level is given.

The error level is subdivided into different categories depending on the severity:

  • Category 0: 0K  Δθ  10K – no measure necessary
  • Category 1: 10K  Δθ  35K – plan long-term repair

  • Category 2: 35K  Δθ  70K – elimination of weak point within 6 months
  • Category 3: Δθ  70K – immediate elimination of weak point
How does thermography work?

The thermographic camera is able to picture thermal radiation at electrical systems which is invisible for the human eye. It reacts sensitive to the long-wave infrared radiation. Every object emits thermal radiation, the detector cell of the camera absorbs this radiation and is heated in this way. Simultaneously current flows through the detector cell, so there is a change in voltage caused by the heating. This change in voltage is outputted as measuring signal and counted back as an image. As result we get an thermogram and can see the different temperatures of the objects.

Why should I execute thermography at electrical installations?

Thermography at electrical installations can help to find possible weak points, that won’t be seen with naked eye. Electro thermography recognizes all initiating defects. The defects occur by overheating of the component, e.g. by a loose screw connection.

Am I obligated to check my electrical installations?

Thermography of electrical installations can be prescribed by the property insurer. A periodic (annual) thermographic inspection of electrical installations is required. The electro thermography has to be performed by a recognized expert after DIN VDE 0105.

What are the advantages of the electro thermography?
  • Reducing fire and accident risks
  • Increase of plant availability
  • Electro thermography is performed while ongoing operation
  • Electro thermography can support the visual inspection

Your contact

Stephan Neitzel
Stephan Neitzel

Tel.: +49 4222 - 805 805 0
E-Mail: info@syswe.de

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