Sökning: "current transformer"

Visar resultat 1 - 5 av 83 uppsatser innehållade orden current transformer.

  1. 1. Dielectrics calculation of on-load tap-changer VUCL

    M1-uppsats, KTH/Hållbar produktionsutveckling (ML)

    Författare :Seywan Karimi; [2021]
    Nyckelord :Dielectrics; tap-changer; transformer; lightning impulse levels LI ; system voltage; direct current; resistor; and epoxy material; Dielektriska; lindnings kopplar; transformator; blixtimpuls nivåer LI ; systemspänning; likström; motstånds; epoximateria;

    Sammanfattning : This is a bachelor's thesis in Mechanical engineering. The main topic of the thesis is the electrical calculation of the tap changer's shield. Although there are many kinds of tap-changers, this study focuses on VUCL models. The theoretical background of the thesis is that the new shield is suitable and useable in all VUCL models. LÄS MER

  2. 2. Optimal Demagnetization of Transformer After Winding Resistance Measurements

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

    Författare :Niclas Grönström; [2020]
    Nyckelord :;

    Sammanfattning : In this thesis, transformer demagnetization in connection to winding resistance tests is investigated. In transformer testing, winding resistance measurement (WRM) is an important test used to detect winding or connection faults. It is common practice to measure the resistance by injecting a DC current into the windings of a transformer. LÄS MER

  3. 3. 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. 4. Omkonstruktion av lyftögla till ABB:s transformatorer

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Industriell teknik; Uppsala universitet/Industriell teknik

    Författare :Nils Enbom; Faruk Kodzaga; [2020]
    Nyckelord :Transformator; Transport; Lyft; Produktutveckling; FEM;

    Sammanfattning : Being able to supply larger parts of the world with renewable energy and satisfy the increasing energy demand requires larger and more efficient power transformers. Larger transformers are causing problems within the transport area since most of the railway in Sweden has a maximal width that must not be exceeded. LÄS MER

  5. 5. Empirisk bestämning av nollföljdsimpedans hos transformatorer med utdragen deltalindning

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

    Författare :Carmen Dahlin; [2020]
    Nyckelord :;

    Sammanfattning : The main goal of the thesis is through available data, empirically determine the ratio betweenthe zero and positive-sequence impedance of different transformers with accessible-winding, i.e. when the -winding is loaded. LÄS MER