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7/27/2019 YER ALTI KABLOLARI.pdf
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happyengineernotes.wordpress.com
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Enerjinin ak hava hatlar ile iletilmedii
yerlerde elektrik enerjisinin iletme vedatmak amac ile yeralt kablolarkullanlr.
Hava hattnn kullanma imkan olmayan
yerlerde nehir,gl ve deniz geilerindezorunlulukvardr.
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Kablolarn Ksa Devre artlar Altnda IsnmaAsndan Kontrol Ksa devre zorlamalara uygun iletken ve ekrankesitinin tespit edilmesi gerekir. letkenin Ksa Devre Kapasitesi
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Ksa devre olutuunda ksa devre akmlartarafndan retilen s iletkende depolanr. Bu artlar altnda iletken izin verilen
scakln tesinde snmamaldr. Bu sebeple ksa devrenin balangcndakiiletken scakl ile ksa devre sresimutlaka gz nne alnmaldr.
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Yldz noktas yaltlm veya sndrmebobini zerinden topraklanm ebekelerdeiki faz toprak akmnn ekranlar zerindeen yksek hata akmn meydana getirirler.
ki faztoprak hatas sonucu ekranlar ,metal klflar, zrhlar bu asimetrik ksadevre akmn tamas sonucu snrlar.happyengineernotes.wordpress.com
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Kablolar 3 faz ksa devre akm esas alnpseildiinden kablolarn ekranlarnn , metalklflarnn veya zrhlarnn asimetrik ksadevreye dayanma kapasitelerinin dearatrlmas gerekir.
Ntr dorudan . reaktans bobini veyadk deerli diren zerinden topraklebekelerde de sz konusu ksa deveredayanm kapasitesi kontrolu yaplr.
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LETME GERLMLERNE GRE
AGKablolar(1kV kadar)
OGKablolar(1kV-35kV kadar)YGKablolar(35kV-380kV kadar)
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KULLANILAN YALITKANSENTETKBLEMLERE GRE
Katizolasyonlu Kablolar
PVC (Polivinilklorid) Kablolar PE (Polietilen) Kablolar
XLPE (apraz bal Polietilen)
Kablolar
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LETKEN YAPILDIKLARIMALZEMEYE GRE
Bakr letkenli KablolarAlminyum letkenli Kablolarolarak snflandrlrlar.
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KABLO:Elektrik enerjisini ileten,elektrie karyaltlm bir veya birden fazla damardanolumu bir mamuldr.
DAMAR:Kablonun yaltlm her bir iletkendir. LETKEN:Elektrik enerjisini iletmeye yarayan
yaltlmam tel veya tel demetidir.
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KILIF:letkeni yaltmaya yarayan mekaniketkilerden korumak amac ile kullanlr.letkendamar ve damarlar iine alan bir gmlektir.
YALITKAN KILIF: plak iletkenlerini yaltan ilkklftr.Kullanlan izolasyon maddesine greadlandrlr.
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ORTA KILIF: ok damarl kablolarda damarlarkaplayan yaltc ve doldurucu klftr.
KORUYUCU DI KILIF: ok damarl kablolardaKabloya silindir biimi vermek iin dolgumalzemesinden yaplan ortak klftr. Kabloyud darbe etkilerine kar korur.
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EKRAN:YG Kar Korumak veya enerjikablolarnn haberleme tesislerine etkisiniazaltmak amac ile kullanlan metal sargdr.
KONSANTRK LETKEN: Bir damarl kablolardayaltkan klfn,ok damarl kablolarda ortakklfn zerine gelen bakr telden yaplmsargdr.Bu sarg ntr iletkeni olarak kullanlr.
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ZIRH:Kabloyu mekanik etkilerden koruyanyuvarlak tel veya yass metal eritlerdenyaplm rg veya sarg.Ortak klf zerine sarlr.
TERMOPLASTK YALITKAN: PVC ve PE gibistlarak ekillendirilen ve zamanla ilk sertliideimeyen polimer (plastik)maddelerdir.
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LASTK YALITKAN: Sentetik veya doalkauua veya bunlarn karmna baz katkmaddeleri katlmas ile elde edilen hamurunvulkanilize edilmi durumudur.
happyengineernotes.wordpress.com
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Byk glerin,byk kesitli kablo yerine eitkesitli ve birden fazla kablo ile tanmas dahaekonimiktir.
Ak havada denen kablolarn gne etkilerinden korunmaldr.
Isnma,kablolarn akm tama limitlerinesnrlama getirmektedir.
happyengineernotes.wordpress.com
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Kanal derinlikleri
01 KV ykseklik: 40-50 cm.
1 - 10 KV ykseklik 60-70 cm.
10 - 35 KV ykseklik 80-100 cm.
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happyengineernotes.wordpress.com
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Haberleme kablolarna50 cm.
Kanalizasyon su vehavagaz borularna50 cm.
Yap duvarlarnavediertesislere
70 cm.
(OG kablolar duvara uzakl) 70 cm
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Demiryolugeilerindederinlik en az 150 cmbz iinde olacak ve bir yedek geibulundurulmaldr.
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Diree klar galvaniz tavaolacak ve toprak stboyu1,5 m den az olmamal,
kroelerle yerden monteedilmelidir.
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Yksek gerilim kablolarnn beton kanal ierisine denmesi durumunda kanal derinlii 30 cm genilii ise d = 2n+1)cm arasnda olmaldr. Ancak geniliksnr 20 100 cm arasnda olmaldr. d = kanal ap n = kablo ap
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Kablolar birbirlerine ek kutularnda(muflarda)balant yaplmaldr.
Ek yerlerinde herhangi birarza durumunda Seklinde2 m. birfazlalk braklmaldr.
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Protolin
Silikon kauuk
Is bzdrmeSouk bzdrme
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Mekanik tahribata ve ekin nemalmasnaengelolacak iyi bir elektrii balant temin
edebilecek ekilde olmasgerekir.
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D klfiyice temizlenmeli.
Kabloyu keserken iletken ile izolasyon
arasndabir geveme olmamas iin iletkenularnn balanmas.
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D klf ve izolasyon maddesi soyulurkeniletkenin damarlarna zarar verilmemesine
dikkat edilmeli.
letken yzeyleri (apak) okiyi temizlenmeli.
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Kablo iletken demeti bklm yn tersinedndrlmemeli.
rtibat klemenslerinin kablo kesitineuygun olmasnadikkat edilmeli.
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rtibat klemensleri ve vidalalarnn temiz
olmas, iyice sklmasna zen gsterilmelidir.
Ek malzemeleri hazr olmal ve hazrlklartekrar gzden geirilmeli.
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Protolin maddenin kullanma tarihine ve hava ileirtibatnnolupolmadnadikkat edilmelidir.
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DAHLTP
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HARCTP
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Kablo balklar harici ve dahili olmakzere ikiyeayrlr.
Balk yaplmasnn amac dahilibalantlarda ksa devre darbelerine karkorumak harici tesislerde ise nemin kabloya
szmasn nlemektir.
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1 KVtun altnda dahili tesislerde kablobalna gerek yoktur.
1KVtansonraki dahili tesislerde kablobalyapmazorunluluu vardr.
Kablobalklarndakablo pabucukullanlacakve lehimle doldurulacak.
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malat hatalar
Nakliye ve depolama
Tesis hatalar
Montaj hatalar
Mekanik d etkiler
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Kimyasal ortam etkileri
Termik etkiler
Manevra ve atmosferik gerilim darbeleriEskime ve yalanma
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Soru stek neri ve
ikayet iin Hiekinmeden [email protected]
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