Osittaispurkauksien perusteet

Insinöörityössä käsitellään osittaispurkauksia, niiden mittauksia maakaapeleilla ja niihin liittyviä laitteita. Osittaispurkausmittausten tarkoituksena on kartoittaa vanhojen kaapelijärjestelmien kuntoa sekä varmistaa uusien asennusten toimivuus. Osittaispurkausmittauksia ei ole pakko suorittaa, mutta se voi tuoda esiin ongelmia, jotka voivat olla riski sähköverkkojen toimivuudelle. Tämän insinöörityön tavoite on toimia oppaana osittaispurkauksista ja niihin liityvistä mittauksista kiinnostuneille alan ammattilaisille. Teoriaosuudessa käsitellään erilaisia keskijännitekaapeleita ja varusteita, keskijänniteverkon häiriöitä, osittaispurkauksia ja erilaisia mittaustapoja. Työn lopussa tutustutaan kahteen erilaiseen mittalaitteeseen, jotka poikkeavat mittaustavallaan toisistaan. Työn tuloksena ELTEL Networks Oy sai työnjohdolle sopivan oppaan, josta aiheesta kiinnostuneet voivat perehtyä asiaan. Työtä voi myös käyttää mahdollisesti oppaana mittalaite hankinnoissa.The thesis deals with partial discharges and partial discharge measurements with ground cables and related equipment. The purpose of partial discharge measurements is to map out the condition of old cable systems and to ensure the functionality of new installations. Partial discharge measurements are not required, but it may reveal problems that may be a risk to the functioning of the electrical networks. The aim of this thesis is to serve as a guide for professionals interested in partial discharges and related measurements. The theoretical part deals with various medium voltage cables and equipment, medium voltage network interruptions, partial discharges and various measurement methods. At the end of the work, you will get acquainted with two different measuring devices that differ in their measuring methods. As a result of the work, ELTEL Networks Oy got a suitable guide for the management, from which the people interested in the topic can get acquainted with the issue. The work can also be used as a guide to measuring equipment purchases. The thesis deals with partial discharges and partial discharge measurements with ground cables and related equipment. The purpose of partial discharge measurements is to map out the condition of old cable systems and to ensure the functionality of new installations. Partial discharge measurements are not required, but it may reveal problems that may be a risk to the functioning of the electrical networks. The aim of this thesis is to serve as a guide for professionals interested in partial discharges and related measurements. The theoretical part deals with various medium voltage cables and equipment, medium voltage network interruptions, partial discharges and various measurement methods. At the end of the work, you will get acquainted with two different measuring devices that differ in their measuring methods. As a result of the work, ELTEL Networks Oy got a suitable guide for the management, from which the people interested in the topic can get acquainted with the issue. The work can also be used as a guide to measuring equipment purchases