hrvatski

Ispitivanje transformatora

Rad izlaže i ukratko opisuje glavne postupke pri ispitivanju transformatora. Na samom početku rada izložena je svrha ispitivanja transformatora i podjela postupaka ispitivanja prema njihovoj svrsi, vremenu izvođenja i normama. U nastavku su predstavljena rutinska ispitivanja transformatora: dielektrična rutinska ispitivanja, ispitivanja prijenosnog omjera i grupe spoja, ispitivanja otpora namota, ispitivanja pri kratkom spoju, ispitivanja u praznom hodu, ispitivanja stranim izmjeničnim naponom, prenaponska ispitivanja, mjerenja parcijalnih izbijanja, ispitivanja udarnim naponom i pokus zagrijavanja. Pri prikazivanju svakog pojedinog ispitivanja opisan je postupak provedbe ispitivanja, njegova svrha, te su navedene reference iz standarda na kojima se ispitni postupak zasniva.

ispitivanje transformatora; rutinska ispitivanja transformatora

Abstract: The paper presents and briefly describes the main procedures concerning transformer testing. At the beginning of the paper the aim and the classification of the testing procedures are presented according to their purpose, time of execution and performance standards. Furthermore, routine tests of transformers are presented: dielectric routine tests, measurement of voltage ratio and vector group or phase displacement, measurement of winding resistance, measuring of the short-circuit voltage impedance and the load loss, measuring of the no-load loss and no-load current, separate source AC withstand voltage test, induced voltage tests, partial discharge measurements, lightning impulse and switching impulse test and temperature rise test. Each test is described in considerable detail concerning its testing procedure and purpose. In addition, each test is denoted by the corresponding references listed in standard IEC and IEEE procedures.