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Spectroscopic investigations of the ablated species from the polymers exposed to electric arcs in air
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.ORCID iD: 0000-0002-5547-3986
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0003-3515-3536
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
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2015 (English)In: 2015 3rd International Conference on Electric Power Equipment - Switching Technology, ICEPE-ST 2015, Institute of Electrical and Electronics Engineers (IEEE), 2015, 337-340 p.Conference paper, Published paper (Refereed)
Resource type
Text
Abstract [en]

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.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2015. 337-340 p.
Keyword [en]
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
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-186782DOI: 10.1109/ICEPE-ST.2015.7368331ISI: 000380583500072Scopus ID: 2-s2.0-84962855629ISBN: 9781467374149 (print)OAI: oai:DiVA.org:kth-186782DiVA: diva2:929870
Conference
3rd International Conference on Electric Power Equipment - Switching Technology, ICEPE-ST 2015, Haeundae Grand HotelHaeundae-Beach Road 217, Haeundae-guBusan, South Korea, 25 October 2015 through 28 October 2015
Note

QC 20160520

Available from: 2016-05-20 Created: 2016-05-13 Last updated: 2017-03-02Bibliographically approved
In thesis
1. On the polymer-based nanocomposites for electrical switching applications
Open this publication in new window or tab >>On the polymer-based nanocomposites for electrical switching applications
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Recent research demonstrated that polymer based nanocomposites (PNCs) have been engineered in order to improve the arc interruption capability of the circuit breakers. PNCs are the combination of nano-sized inorganic nanoparticles (NPs) and polymers, opened up new developments in materials science and engineering applications. Inorganic NPs are selected based on their physical and chemical properties which could make multifunctional PNCs in order to interrupt the electrical arcs effectively. In particular, we presented the PNCs fabricated by using CuO, Fe3O4, ZnO and Au NPs in a poly (methyl methacrylate) (PMMA) matrix via in-situ polymerization method, recently developed method to avoid NPs agglomeration, leading to good spatial distribution in the polymer matrix. Thus, several samples with various wt% of NPs in PMMA matrix have been fabricated. These PNCs have been characterized in detail for the morphology of NPs, interaction between NPs and polymer matrix, and radiative/thermal energy absorption properties. In the next stage, PNCs are tested to determine their arc interruption performance and impact on the electrical arcs of current 1.6 kA generated using a specially designed test set-up. When PNCs interact with the electrical arcs, they generate ablation of chemical species towards core of the electrical arc, resulting in cooling-down the arc due to strong temperature and pressure gradient in the arc quenching domain. This thesis demonstrates for the first time that these engineered PNCs are easily processed, reproducible, and can be used to improve the arc interruption process in electrical switching applications.

Abstract [sv]

Ny forskning har visat att polymerbaserade nanokompositer (PNCs) har utformats för att förbättra strömbrytares förmåga att undvika ljusbågar vid överslag. PNCs är en kombination av nanostora oorganiska nanopartiklar (NP) och polymerer, som har öppnat upp för ny utveckling inom materialvetenskap och tekniska tillämpningar. Oorganiska NP väljs baserat på deras fysikaliska och kemiska egenskaper som kan hjälpa PNCs att motverka elektriska ljusbågar effektivt. I synnerhet, presenterade vi PNCs tillverkade genom användning av CuO, Fe3O4, ZnO och Au NP i en poly (metylmetakrylat) (PMMA)-matris via in situ-polymerisationsmetod, nyligen utvecklad för att undvika NP-agglomerering, vilket leder till god rumslig fördelning i polymermatrisen. Därför har flera prover med olika vikt% av NP i PMMA-matris tillverkats. Dessa PNCs har utvärderats i detalj för NP-morfologi, interaktion mellan NP och polymermatris, och strålnings- och värmeenergiabsorption. I nästa skede testas PNCs för att bestämma deras förmåga att undvika ljusbågar och påverkan på de elektriska ljusbågarna av 1,6 kA strömstyrka, genererade med hjälp av en specialdesignad test-set-up. När PNCs interagerar med de elektriska ljusbågarna, genererar de ablation av kemiska ämnen mot kärnan i den elektriska ljusbågen, vilket resulterar i nedkylning av ljusbågen på grund av starka temperatur- och tryckgradienter i området. Denna avhandling visar för första gången att dessa konstruerade PNCs är lätta att framställa, reproducerbara, och kan användas för att förbättra avbrottsprocessen för ljusbågen i elektriska kopplingstillämpningar.

Place, publisher, year, edition, pages
Stockholm, Sweden: KTH Royal Institute of Technology, 2017. 62 p.
Series
TRITA-FYS, ISSN 0280-316X ; 2017:08
Keyword
Polymer-based nanocomposites, Inorganic nanoparticles, Electrical arcs, Circuit breakers, Ablation/Outgassing, Arc interruption capability, PMMA, CuO, Fe3O4, ZnO, Au, Radiative energy, Electric power, Arc temperature.
National Category
Composite Science and Engineering
Research subject
Physics
Identifiers
urn:nbn:se:kth:diva-202702 (URN)978-91-7729-288-3 (ISBN)
Public defence
2017-03-24, FA31, Roslagstullsbacken 21, Albanova Universitetscentrum, Stockholm, 14:00 (English)
Opponent
Supervisors
Funder
Swedish Research Council, D0564701Swedish Foundation for Strategic Research , EM11-0002
Note

QC 20170303

Available from: 2017-03-03 Created: 2017-03-02 Last updated: 2017-03-03Bibliographically approved

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