Sökning: "Transformer oils"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Transformer oils.

  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. Investigation of ion mobility in insulation liquids for transformers.

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Bruce Dondogori; [2020]
    Nyckelord :;

    Sammanfattning : This thesis studies a method of measuring ion mobility in insulation liquids for transformers (transformer oil). This method works by using a square wave voltage to make the charged particles (space charge) inside the oil move between two electrodes. LÄS MER

  4. 3. Measurements of resistivity in transformer insulation liquids

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för elektroteknik

    Författare :Jonathan Hägerbrand; [2020]
    Nyckelord :transformer oil; resistivity; ions; ion drift model; HVDC; contact resistance;

    Sammanfattning : This thesis focuses on measuring techniques and results of resistivity in four commercially available insulating transformer oils: mineral oil, ester oil and two isoparaffin oils. Two measuring techniques, the industrially used diagnostic system for electrical insulation IDA and the Labview implemented Triangular Method, are used for resistivity measurements and the techniques are compared, a correction algorithm to the triangular method is suggested. LÄS MER

  5. 4. 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

  7. 5. Utveckling av laboration om trefastransformatorn : En studie om transformatorer

    M1-uppsats, KTH/Skolan för teknik och hälsa (STH)

    Författare :Mohammed Al-Breihi; [2014]
    Nyckelord :Electrical Power; three-phase transformer; lab; mohammed; al-breihi; study; transformer; Elkraft; trefastransformator; labb; mohammed; al-breihi; examensarbete; studie; transformator; transformatorn; trefastransformatorn;

    Sammanfattning : Examensarbetet har utforts pa uppdrag av enheten for Data- och Elektroteknik pa skolan for Teknik och Halsa, KTH. Denna studie om transformatorer omfattar deras funktioner och anvandningsomraden, hur de ar uppbyggda, hur karnan och lindningarna som ar transformatorns viktigaste delar ar uppbyggda, vilka materiel som anvands vid konstruktion av dessa samt vilka typer det finns av dem beskrivs i rapporten. LÄS MER