HJH-Messtechnik - Electrical-Thermography

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SERVICES - Thermography
Electrical - Thermography

In the visible part of light only the normal function of gadgets / electrical distributors are seen.
Presumably the devices have already been in use for some years. Therefore the thermogram
gives you further results.

During the electric inspection with thermography the various electrical distributors have to bear
a load, i.e. they will be inspected during the normal operation. The facility operator has no
interruption of operation during the inspection. The conventional methods of maintenance are
confined to the visual- and mechanical check and so it is necessary to switch off the electrical
energy most of the time which can lead to an unpleasant situation. The engineer detects the
weak points already while measuring the plant and transforms the image to a data medium and
documents the results after the measurement. On the basis of the documents the maintenance
can be done in a very exact way. Hence, this kind of inspection elevates the efficiency and
reduces significant costs.

The following example shows an electrical distributor in a critical situation. The thermal image is shown in grey so also ordinary people can see the potential of defects more easily. The ostentatious part of the fuse can easily be recognized as well as the development of the heat in the cable ducts (the image can be presented in different colours).


damaged cut-off switch	safety fuses with different kinds of loads

-	in a few days a row of electrical distributors can be completely controlled by using electrical thermography. Therefore you receive accounting records with images of the status of the facility at the moment of the measurement.
-	Integrating the measurement of the temperature it is possible to decide whether there is a normal temperature rise or a defect at the facility. An adequate maintenance plan or repair work can be carried out.
-	Integrating the measurement of the temperature it is possible to decide whether there is a normal temperature rise or a defect at the facility. An adequate maintenance plan or repair work can be carried out.
-	The damaged part of the plant becomes quickly warmer because of the ohmic resistor. If a resistor is too big the contact could start burning out and the electric part becomes inoperative. Therefore all consequences of the electric break-down are to bear in mind.
-	The electric thermography gives you an overview of the balance of the electric phases.
-	The wires give information about the load of energy by showing a temperature rise. This way they can also be detected under the roughcast. The only requirement for this is a sensible thermography-system with a high image quality.
-	During an examination of your wiring system, concealed and unexpected electricity consumers which raise your electricity bill could be detected.
-	Short time overloads and shunt circuits are not always detected by the fuse. Consequently the risk of an electric shock or a fire hazard is possible. By having an inspection with thermography, this problem can be avoided completely.
-	The high inductive or capacitive load of a cable can further lead to a detectable temperature rise by blind current.


	Thermal abnormality of a wire connection	A defective machine at the terminal of the wire	A comparison of the temperature of the contact brushes of a generator