Sökning: "Transformatorolja"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet Transformatorolja.

  1. 1. Investigation of MIDEL 7131’s Dielectric Breakdown Strength and Thermal Behaviour : Master Thesis, an experimental study using concentric-like electrodes at elevated temperatures to study breakdowns

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Kim Lin; [2023]
    Nyckelord :Dielectric strength; High voltage; Liquid dielectric; MIDEL 7131; Electrical breakdown; Temperature cycle; Dielektrisk styrka; Högspänning; Dielektriska vätskor; MIDEL 7131; Elektrisk nedbrytning; Temperaturcykling;

    Sammanfattning : Dielectric insulation are constantly exposed to various stresses, while also being expected to last for long periods of time. Naturally, they degrade with use and in demanding operational environments, this degradation phenomena can be accelerated, leading to costly consequences. LÄS MER

  3. 2. The Sustainability related opportunities and challenges with various transformer insulation fluids and business case on re-refining

    Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Ibrahim Gharib Ali Jalal; Abdulbasit Abdulaziz Ali; [2017]
    Nyckelord :Transformer oils; LCA; Re-refining; Business case; Sustainability;

    Sammanfattning : Transformers are electrical devices used in practice to increase or decrease voltages. Transformers are of various sizes and used mainly in power distribution. To provide cooling and insulation, transformer oils are used together with cellulose that acts as a solid insulation. LÄS MER

  4. 3. Grease-oil compatibility in tribological applications - supergrease

    Master-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Anna Von Krusenstierna; [2016]
    Nyckelord :tap-changer; lindingskopplare; fett; grease; transformer oil; grease-oil compatibility; materials chemistry; materialkemi; Technology and Engineering; Chemistry;

    Sammanfattning : A common reason to malfunctioning of tap-changers is wear of tribological contacts. In order to reduce wear, it would be desirable to lubricate the contacts. Since the tap-changer is working in transformer oil, it is necessary that whatever lubricant is added is compatible with transformer oil. LÄS MER

  5. 4. General description of measures for environmental compliance of substations owned by Svenska kraftnät in protected areas with focus on oil spill

    Uppsats för yrkesexamina på avancerad nivå, KTH/Skolan för kemivetenskap (CHE)

    Författare :Victoria Done; [2014]
    Nyckelord :substation; environmental compliance; transformer oil; oil separation; oil handling; ställverk; miljösäkring; transformatorolja; oljeavskiljning; oljehantering;

    Sammanfattning : Svenska kraftnät is the Swedish transmission system operator, responsible for the national electrical grid with power lines of 220 kV and 400 kV, and the electrical substations of the grid. In this master thesis an old substation located in a sensitive environmental area is inspected and its environmental risks defined and assessed. LÄS MER

  7. 5. Transformatordiagnostik genom dissolverad gasanalys

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Daniel Ruisniemi; [2014]
    Nyckelord :Transformatordiagnostik; DGA; Krafttransformator; Transformatorolja; Dissolverad gasanalys;

    Sammanfattning : The transformer is one of the most common and most important electric machines for power companies. Cost of investment and the economic worth of a transformer are counted in millions of SEK. Because of that, proper maintenance actions that may lead to longer technical life time should be the aim in all situations. LÄS MER