
dhin railu

dinn railu anedi oka praamaanika rakam loha railu, idhi parikaraala raakla lopala circuit breakerlu mariyu paarisraamika niyantrana parikaraalanu amarchadaaniki vistrutamgaa upayoginchabadutundi. eee utpattulu saadhaaranamgaa jink-puuta ledhaa rangula prakaasavantamaina uparitala mugimputho challani chuttabadina carbon steel sheet nundi tayaaru cheyabadataayi. lohamainappatiki, avi yaantrika maddatu kosam matrame uddesinchabaddaayi mariyu vidyut pravahanni nirvahinchadaaniki bus barga upayoginchabadavu, ayinappatikee avi chatram grounding connectionnu andinchavacchu.
eee padam germanyloni duish institute pharr normang (dinn) prachurinchina asalu specificationla nundi udbhavinchindi, ivi appati nundi european (enn) mariyu antarjaateeya (iec) pramanaluga sweekarinchabaddaayi. asalu bhavana 1928loe germanylo abhivruddhi cheyabadindi mariyu amalu cheyabadindi, mariyu 1950laloe prastuta pramaanaalaku vistarinchabadindi.
rakalu.
dhin railulo moodu pradhana rakalu unnaih
top hyaat rail iec/enn 60715.
eee 35 mimi vedalpu gala railu circuit breakerlu, rilelu, prograamable logic controllerlu, motaru controllerlu mariyu itara vidyut parikaraalanu amarchadaaniki vistrutamgaa upayoginchabadutundi. enn 60715 pramaanam 7.5 mimi (paina chuupina) mariyu 15 mimi lothaina version rendintinee perkontundi, ivi adhikarikamga niyaminchabaddaayi.
kontamandi tayaareedaarula ketalaglu eee padaalanu kooda upayogistaayih top hyaat vibhagam/th/th35 (35 mimi vedalpu kosam)/rakam o/rakam omega (ω).
eee railunu americalo ts 35 railu anie pilustaaru.
module vedalpu.
35 mimi "top hyaat" dhin raillo amarchabadina parikaraala vedalpu saadhaaranamgaa "modules" nuu vedalpu unitga upayogistundi, oka module 18 mimi vedalpu untundi. udaaharanaku, oka chinna parikaram (udhaa.zii. circuit breaker) 1 module vedalpu (18 mimi vedalpu) kaligi undavacchu, ayithe oka pedda parikaram 4 modules vedalpunu kaligi undavacchu, parikaraala aavaranalu kooda eee module vedalpulanu anusaristaayi, kabatti dinn rail unna aavaranalo 20 maadyuullaku sthalam undavacchu, udaaharanaku. anni parikaraalu eee module vedalpulanu anusarinchavu. 
module vedalpulu saadhaaranamgaa "m" (e.zii. 4 mea = 4 modules). kontamandi tayaareedaarulu (sagatu baavitho sahaa) "suu" (bahusha "praamaanika unit" nuu suuchistumdi, udhaa.zii. 4su = 4 modules).
sii vibhagam.
eee pattalu icchina sahanasaktulalo samaruupamgaa untaayi. naalugu prasiddha sii-section pattalu unnaayi, sii20, sii30, sii40 mariyu sii50. sankhya pratyayam railu yokka mottam niluvu ettuku anugunamgaa untundi.
zii vibhagam.
zii-rakam railu (enn 50035, bs 5825, dinn 46277-1 prakaram).
zii railu saadhaaranamgaa bhaarii, adhika-shakti bhaagaalanu pattukoodaaniki upayoginchabadutundi. idhi diguvana lothaina vaipu amarchabadi, parikaraalu pedavipai kattabadi, aapai lotuleni vaipu loki klippayye varaku tippabadataayi.
itarulu.
prajaadarana pondina 35 mimi × 7.5 mimi top-hyaat rail (enn 50022, bs 5584, dinn 46277-3) thoo paatu, aneka takkuva vistrutamgaa upayoginche mountu pattalu kooda praamaanikam cheyabaddayi