{"id":6401,"date":"2018-06-27T09:50:13","date_gmt":"2018-06-27T07:50:13","guid":{"rendered":"https:\/\/www.miottisrl.com\/?p=6401\/"},"modified":"2018-06-27T09:50:13","modified_gmt":"2018-06-27T07:50:13","slug":"toplotna-otpornost-izolacionih-materijala","status":"publish","type":"post","link":"https:\/\/www.miottisrl.com\/hr\/toplotna-otpornost-izolacionih-materijala\/","title":{"rendered":"TOPLOTNA OTPORNOST IZOLACIONIH MATERIJALA"},"content":{"rendered":"<p>Termi\u010dke otpornosti elektri\u010dnog izolacionog materijala \u010desto se mere prema standardima IEC 60216-1 i IEC 60216-2.<\/p>\n<p>Standardi obja\u0161njavaju kako se odre\u0111uje indeks temperature (TI), \u0161to predstavlja temperaturu pri kojoj izabrani parametar dostigne kriti\u010dnu vrednost, nakon 20.000 sati \u017eivota.<\/p>\n<p>U slu\u010daju elastomers kao \u0161to su polyolefins, norma IEC 60216-2 inicira odabir &#8220;elongacije do ta\u010dke lomljenja&#8221; kao parametar za odre\u0111ivanje prekida veka trajanja : kada ovaj parametar padne ispod 50%, pretpostavlja se da je elastomer izgubio izolacione karakteristike.<\/p>\n<p>Ovo se mo\u017ee smatrati konzervativnom metodom, uglavnom u aplikacijama gde materijal nema elongaciju, posle instaliranja.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6179 \" src=\"https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-1-2.jpg\" alt=\"\" width=\"458\" height=\"334\" srcset=\"https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-1-2.jpg 476w, https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-1-2-300x219.jpg 300w\" sizes=\"(max-width: 458px) 100vw, 458px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Uzorci materijala peku se na razli\u010ditim temperaturama kako bi se izmerili sati potrebni da se postigne kraj veka trajanja samih uzoraka. Zatim se ekstrapolira da bi se dobila vrednost temperature koja odgovara vremenu od 20.000 sati starenja.<\/p>\n<p>Pretpostavlja se da postoji gotovo linearna veza izme\u0111u logaritma &#8211; potrebnog vremena za smanjenje elongacije do lomljenja na 50% i temperature (relacija Arrhenius).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6222 \" src=\"https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-1-3.jpg\" alt=\"\" width=\"491\" height=\"443\" srcset=\"https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-1-3.jpg 504w, https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-1-3-300x271.jpg 300w\" sizes=\"(max-width: 491px) 100vw, 491px\" \/><\/p>\n<p>Arrheniusov izve\u0161taj tako\u0111e dozvoljava odre\u0111ivanje prepolovljenog nivoa HIC, to je temperaturni interval potreban za dupliranje (u slu\u010daju smanjenja) ili prepolovljavanje (u slu\u010daju pove\u0107anja) o\u010dekivanog trajanja.<\/p>\n<p>Za ovu vrednost, normalno podrazumeva 10\u00b0C za izolacione materijale. Dakle, smanjenje od 10 \u00b0 C duplira \u017eivot, a pove\u0107anje od 10 \u00b0 C prepolovi \u017eivot. Me\u0111utim, ovaj linearni odnos, prestaje da va\u017ei na visokim temperaturama blizu temperature staklene tranzicije ili topljenja.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6189 \" src=\"https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-2-modif.jpg\" alt=\"\" width=\"484\" height=\"422\" srcset=\"https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-2-modif.jpg 643w, https:\/\/www.miottisrl.com\/wp-content\/uploads\/2018\/05\/diagramma-2-modif-300x262.jpg 300w\" sizes=\"(max-width: 484px) 100vw, 484px\" \/><\/p>\n<p>Odre\u0111ivanje indeksa temperature (TI) omogu\u0107ava upore\u0111ivanje performansi razli\u010ditih \u017eica. Testovi Huber + Suhner-a pokazali su bolje performanse RADOKS \u017eica u pore\u0111enju sa glavnim konkurentima.<\/p>\n<p>Na zahtev ispitiva\u010da mo\u017ee se razgovarati sa korisnicima \u017eica o postignutim rezultatima pomenutih produkata.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Termi\u010dke otpornosti elektri\u010dnog izolacionog materijala \u010desto se mere prema standardima IEC 60216-1 i IEC 60216-2. Standardi obja\u0161njavaju kako se odre\u0111uje indeks temperature (TI), \u0161to predstavlja temperaturu pri kojoj izabrani parametar dostigne kriti\u010dnu vrednost, nakon 20.000 sati \u017eivota. U slu\u010daju elastomers kao \u0161to su polyolefins, norma IEC 60216-2 inicira odabir &#8220;elongacije do ta\u010dke lomljenja&#8221; kao parametar<\/p>\n","protected":false},"author":28,"featured_media":6239,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[60,65],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>TOPLOTNA OTPORNOST IZOLACIONIH MATERIJALA - Miotti<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.miottisrl.com\/hr\/toplotna-otpornost-izolacionih-materijala\/\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TOPLOTNA OTPORNOST IZOLACIONIH MATERIJALA - Miotti\" \/>\n<meta property=\"og:description\" content=\"Termi\u010dke otpornosti elektri\u010dnog izolacionog materijala \u010desto se mere prema standardima IEC 60216-1 i IEC 60216-2. 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