20.500.12556/RUL-80639 Terensko testiranje kompaktnih odklopnikov in bimetalnih relejev Field testing of molded case circuit breakers and bimetal relays Namen diplomske naloge je predstaviti postopke in rezultate testiranj kompaktnih odklopnikov in bimetalnih relejev na terenu. Redna testiranja so potrebna, ker se s časom spreminjajo lastnosti varovalnih naprav, kar vpliva na njihove izklopne karakteristike. Meritve izvajamo po priporočilih in navodilih organizacije NEMA ( National Electrical Manufacturers Association ) s standardom AB 4. V diplomski nalogi so opisani kompaktni odklopniki in bimetalni releji. Podrobneje so opisani sprožilni mehanizmi za zaznavo okvarnih tokov in njihove tipične izklopne karakteristike. V nalogi nadalje predstavimo postopke testiranj električnih karakteristik kompaktnih odklopnikov in bimetalnih relejev. Meritve zajemajo merjenje kontaktnih upornosti in testiranja izklopnih karakteristik, kjer testiramo kratkostične in preobremenitvene sprožilnike. Na koncu naloge so predstavljeni rezultati testiranj in najpogostejši okvarni vzroki. The purpose of this thesis is to present procedures and results of field testing of molded case circuit breakers and bimetallic relays. Regular field testing is necessary, since the properties of the protective devices vary in time and this affects their time-current characteristics. The measurements are performed according to the recommendations and directions of the organization NEMA (National Electrical Manufacturers Association) standard AB 4. Initially, molded case circuit breakers and bimetallic relays are described. Their tripping mechanism to detect fault currents and tripping characteristic are presented in detail. Additionally, procedures for testing electrical characteristics of the circuit breakers and bimetal relays are demonstrated. The measurements include measuring of the contact resistance and testing tripping characteristic in which short-circuit and overload tripping mechanisms are tested. Finally, results of field testing with the most common origins of faults are reported. kompaktni odklopnik bimetalni rele kontaktna upornost izklopna karakteristika NEMA AB 4. molded case circuit breaker bimetallic relay contact resistance time-current characteristic NEMA AB 4. true false false Slovenski jezik Angleški jezik Diplomsko delo 2016-02-26 14:20:02 2016-02-26 14:20:04 2022-08-01 21:08:12 0000-00-00 00:00:00 2016 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 33081 Andrejas_Ales_-_Terensko_testiranje_kompaktnih_odklopnikov_in_bimetalnih_relejev.pdf Andrejas_Ales_-_Terensko_testiranje_kompaktnih_odklopnikov_in_bimetalnih_relejev.pdf 1 5622AB7D308BB3A441B4D258DF2E310D b873d1460a7371e95c630319194d590ae6ee909a1a6db534b4b25a9794c52643 691306e9-a1ad-11eb-a523-00155dcfd717 20.500.12556/rul/2b3d454e-8b8b-40e1-9f83-d6ff24a1f803 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=80685 Fakulteta za elektrotehniko 0 0 0