Spectroscopic investigations of the ablated species from the polymers exposed to electric arcs in air

• Polymeric walls have been widely used in the last decades to improve the arc interruption process in electrical switching applications. This improvement is achieved by the evaporation (ablation) of the polymeric walls due to the highly energetic radiation generated by the electrical arcs. This experimental study deals with polymeric walls that are exposed to the electrical arcs generated between a 5 mm air gap with prospective current of 1.4 kA. In this paper, two different techniques are discussed aiming at the identification of the dominant ablated species produced during the arc interruption process, namely Fourier transform infrared spectroscopy (FTIR) and Thermogravimetric analysis coupled with Fourier transform infrared analysis of evolved gases (EGA). In addition, the morphological and chemical changes on the surface of the exposed polymeric walls are analyzed by microscopical techniques.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

arc interruption process

Electrical arcs

FTIR spectroscopy

polymer ablation

Ablation

Chemical analysis

Electric arcs

Fourier transform infrared spectroscopy

Switching networks

Thermogravimetric analysis

Chemical change

Electrical arc

Electrical switching

Energetic radiation

Fourier transform infra reds

Spectroscopic investigations

Polymers

Publikations- och innehållstyp

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