{"id":4266,"date":"2024-02-27T14:10:18","date_gmt":"2024-02-27T20:10:18","guid":{"rendered":"https:\/\/www.dreiym.com\/?p=4266"},"modified":"2025-01-17T18:02:42","modified_gmt":"2025-01-18T00:02:42","slug":"nec-2023-240-87-ark-enerji%cc%87si%cc%87ni%cc%87n-azaltilmasi","status":"publish","type":"post","link":"https:\/\/vm6fr4whzn6.c.updraftclone.com\/tr\/2024\/02\/27\/nec-2023-240-87-ark-enerji%cc%87si%cc%87ni%cc%87n-azaltilmasi\/","title":{"rendered":"NEC 240.87: Ark Enerjisi Azalt\u0131m\u0131"},"content":{"rendered":"<p>Elektrik Profesyonelleri i\u00e7in 2023 NEC bask\u0131s\u0131 i\u00e7in bir K\u0131lavuz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">NEC 240.87 nedir?<\/h2>\n\n\n\n<p>NEC 240.87 bir kod b\u00f6l\u00fcm\u00fcd\u00fcr. <a href=\"https:\/\/en.wikipedia.org\/wiki\/National_Electrical_Code\" title=\"\">Ulusal Elektrik Kodu (NEC<\/a>) 1200 amper veya daha y\u00fcksek de\u011ferdeki devre kesiciler i\u00e7in ark enerjisi azaltma y\u00f6ntemleri gerektirir. Ark enerjisi, bir ark taraf\u0131ndan \u00fcretilen \u0131s\u0131 ve \u0131\u015f\u0131k miktar\u0131d\u0131r. <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/tr\/2024\/06\/11\/ark-parlamalarinin-derinlemesine-elektrik-ariza-analizi-ve-denetimleri-ile-nasil-iliskili-oldugu\/'>elektrik ark\u0131<\/a> ekipman ve personelde ciddi hasara neden olabilen ar\u0131za. Ark enerjisini azaltma y\u00f6ntemleri, bir ark ar\u0131zas\u0131n\u0131n s\u00fcresini ve yo\u011funlu\u011funu azaltmak ve b\u00f6ylece potansiyel tehlikeleri en aza indirmek i\u00e7in tasarlanm\u0131\u015ft\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">NEC 240.87 neden \u00f6nemlidir?<\/h2>\n\n\n\n<p>NEC 240.87 \u00f6nemlidir \u00e7\u00fcnk\u00fc a\u015fa\u011f\u0131daki alanlarda ciddi bir g\u00fcvenlik sorununu ele almaktad\u0131r <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/tr\/2022\/07\/29\/elektrik-sistemlerinin-arizalanmasinin-3-yaygin-nedeni\/'>elektri\u0307k si\u0307stemleri\u0307<\/a>. Ark hatalar\u0131, izolasyon ar\u0131zas\u0131 gibi \u00e7e\u015fitli nedenlerden dolay\u0131 meydana gelebilir, <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/tr\/2024\/02\/28\/gevsek-elektri%cc%87k-baglantilarindan-kacinma-ve-yangin-tehli%cc%87kesi%cc%87ni%cc%87-onleme\/'>gev\u015fek ba\u011flant\u0131lar,<\/a> yabanc\u0131 cisimler veya insan hatas\u0131. Bir ark hatas\u0131 meydana geldi\u011finde, metali eritebilen, yan\u0131c\u0131 maddeleri tutu\u015fturabilen ve ciddi yan\u0131klara ve yaralanmalara neden olabilen 35.000 Fahrenheit dereceye kadar s\u0131cakl\u0131klar \u00fcretebilir. Ark ar\u0131zalar\u0131 ayr\u0131ca kulak zarlar\u0131n\u0131 patlatabilecek, akci\u011ferlere zarar verebilecek ve camlar\u0131 k\u0131rabilecek bas\u0131n\u00e7 dalgalar\u0131 olu\u015fturabilir. Ulusal Yang\u0131ndan Korunma Birli\u011fi'ne (NFPA) g\u00f6re, ark hatalar\u0131 Amerika Birle\u015fik Devletleri'nde y\u0131lda 2.000'den fazla yaralanma ve 400 \u00f6l\u00fcmden sorumludur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">NEC 240.87'nin gerektirdi\u011fi ark enerjisi azaltma y\u00f6ntemleri nelerdir?<\/h2>\n\n\n\n<p>NEC 240.87, 1200 amper veya daha y\u00fcksek de\u011ferdeki devre kesiciler i\u00e7in a\u015fa\u011f\u0131daki ark enerjisi azaltma y\u00f6ntemlerinden birini gerektirir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>B\u00f6lge se\u00e7ici kilitleme (ZSI): Bu y\u00f6ntem, a\u00e7ma s\u00fcrelerini koordine etmek ve ar\u0131zal\u0131 b\u00f6lgeyi m\u00fcmk\u00fcn olan en k\u0131sa s\u00fcrede izole etmek i\u00e7in devre kesiciler aras\u0131ndaki ileti\u015fim sinyallerini kullan\u0131r. ZSI, geleneksel koordinasyona k\u0131yasla ark enerjisini 50%'ye kadar azaltabilir. ZSI, uyumlu devre kesiciler ve bunlar aras\u0131nda kablolama gerektirir.<\/li>\n\n\n\n<li>Diferansiyel r\u00f6le: Bu y\u00f6ntem, bir devre kesicinin gelen ve giden ak\u0131mlar\u0131 aras\u0131ndaki fark\u0131 \u00f6l\u00e7mek i\u00e7in ak\u0131m transformat\u00f6rlerini kullan\u0131r ve fark ayarlanan bir de\u011feri a\u015farsa kesiciyi a\u00e7ar. Diferansiyel r\u00f6le, geleneksel koordinasyona k\u0131yasla ark enerjisini 80%'ye kadar azaltabilir. Diferansiyel r\u00f6le ek ak\u0131m transformat\u00f6rleri ve r\u00f6leler gerektirir.<\/li>\n\n\n\n<li>Yerel durum g\u00f6stergesi ile enerji azalt\u0131c\u0131 bak\u0131m anahtarlamas\u0131: Bu y\u00f6ntem, devre kesicinin a\u00e7ma e\u015fi\u011fini azaltmak i\u00e7in manuel olarak \u00e7al\u0131\u015ft\u0131r\u0131labilen bir anahtar ve anahtar\u0131n durumunu g\u00f6steren bir \u0131\u015f\u0131k kullan\u0131r. Enerji azalt\u0131c\u0131 bak\u0131m anahtarlamas\u0131, geleneksel koordinasyona k\u0131yasla ark enerjisini 70%'ye kadar azaltabilir. Enerji azalt\u0131c\u0131 bak\u0131m anahtarlamas\u0131, devre kesicinin \u00fczerinde veya yak\u0131n\u0131nda bir anahtar ve bir \u0131\u015f\u0131k gerektirir.<\/li>\n\n\n\n<li>Enerji azalt\u0131c\u0131 aktif ark parlamas\u0131 azaltma sistemi: Bu y\u00f6ntem, hata ak\u0131m\u0131 i\u00e7in d\u00fc\u015f\u00fck empedansl\u0131 bir yol olu\u015fturarak ve ark i\u00e7in bir kar\u015f\u0131 voltaj uygulayarak bir ark hatas\u0131n\u0131 tespit edip s\u00f6nd\u00fcrebilen bir cihaz kullan\u0131r. Enerji azalt\u0131c\u0131 aktif <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/tr\/2020\/09\/08\/ark-parlamasi-olaylarini-azaltmanin-yollari\/'>ark parlamas\u0131 azaltma sistemi<\/a> geleneksel koordinasyona k\u0131yasla ark enerjisini 90%'ye kadar azalt\u0131r. Enerji azalt\u0131c\u0131 aktif ark parlamas\u0131 azaltma sistemi bir cihaz ve bir g\u00fc\u00e7 kayna\u011f\u0131 gerektirir.<\/li>\n\n\n\n<li>Anl\u0131k a\u00e7ma ayar\u0131: Bu y\u00f6ntem, ar\u0131za ak\u0131m\u0131 \u00f6nceden ayarlanm\u0131\u015f bir de\u011fere ula\u015ft\u0131\u011f\u0131nda bir d\u00f6ng\u00fc veya daha k\u0131sa bir s\u00fcre i\u00e7inde a\u00e7abilen bir devre kesici kullan\u0131r. Ani a\u00e7ma ayar\u0131, geleneksel koordinasyona k\u0131yasla ark enerjisini 40%'ye kadar azaltabilir. Anl\u0131k a\u00e7ma ayar\u0131, ayarlanabilir bir anl\u0131k a\u00e7ma i\u015flevine sahip bir devre kesici gerektirir.<\/li>\n\n\n\n<li>Anl\u0131k ge\u00e7ersiz k\u0131lma: Bu y\u00f6ntem, normal zaman gecikmesini ge\u00e7ersiz k\u0131labilen ve ar\u0131za ak\u0131m\u0131 belirli bir seviyeyi a\u015ft\u0131\u011f\u0131nda hemen devreye girebilen bir devre kesici kullan\u0131r. Anl\u0131k ge\u00e7ersiz k\u0131lma, geleneksel koordinasyona k\u0131yasla ark enerjisini 60%'ye kadar azaltabilir. Anl\u0131k ge\u00e7ersiz k\u0131lma, anl\u0131k ge\u00e7ersiz k\u0131lma \u00f6zelli\u011fine sahip bir devre kesici gerektirir.<\/li>\n\n\n\n<li>Onaylanm\u0131\u015f e\u015fde\u011fer ara\u00e7lar: Bu y\u00f6ntem, ark enerjisini \u00e7al\u0131\u015fma mesafesindeki olay enerjisinin alt\u0131ndaki bir seviyeye indirebilen ba\u015fka herhangi bir teknolojiyi kullan\u0131r. Onayl\u0131 e\u015fde\u011fer ara\u00e7lar performanslar\u0131 ve kurulum gereksinimleri a\u00e7\u0131s\u0131ndan farkl\u0131l\u0131k g\u00f6sterebilir. Onayl\u0131 e\u015fde\u011fer ara\u00e7lar yetkili makam taraf\u0131ndan onaylanmal\u0131d\u0131r. Bazen yarat\u0131c\u0131l\u0131k gereklidir ve \u00f6zel r\u00f6le fonksiyonlar\u0131n\u0131n veya di\u011fer m\u00fchendislik \u00e7\u00f6z\u00fcmlerinin uygulanmas\u0131 ark hatas\u0131n\u0131n azalt\u0131lmas\u0131 i\u00e7in ayn\u0131 veya daha iyi sonu\u00e7lar elde edebilir. Bunu ba\u015farmak i\u00e7in m\u00fchendislik hesaplamalar\u0131 gerekecektir. Bir uzmana dan\u0131\u015f\u0131n <a href=\"https:\/\/vm6fr4whzn6.c.updraftclone.com\/tr\/services\/elektrik-gucu\/ark-parlamasi-calismalari\/\" title=\"\">elektri\u0307k m\u00fchendi\u0307si\u0307<\/a> di\u011fer \u00e7\u00f6z\u00fcmlerde size yard\u0131mc\u0131 olmak i\u00e7in.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">NEC 240.87 ile nas\u0131l uyum sa\u011flan\u0131r?<\/h2>\n\n\n\n<p>NEC 240.87 ile uyumlu olmak i\u00e7in elektrik uzmanlar\u0131 a\u015fa\u011f\u0131daki ad\u0131mlar\u0131 izlemelidir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Elektrik sistemindeki 1200 amper veya daha y\u00fcksek de\u011ferdeki devre kesicileri tan\u0131mlay\u0131n.<\/li>\n\n\n\n<li>Her devre kesici i\u00e7in ark enerjisi azaltma y\u00f6ntemlerinden birini se\u00e7in ve kurun.<\/li>\n\n\n\n<li>Devre kesiciyi ark enerjisi azaltma y\u00f6ntemi ve belgelerin konumu ile etiketleyin.<\/li>\n\n\n\n<li>Ark enerjisi azaltma y\u00f6ntemini ve devre kesicinin ayarlar\u0131n\u0131 belgeleyin.<\/li>\n\n\n\n<li>Ark enerjisi azaltma y\u00f6nteminin i\u015flevselli\u011fini test edin ve do\u011frulay\u0131n.<\/li>\n\n\n\n<li>Ark fla\u015f\u0131 tehlike analizini ve elektrik sisteminin ark fla\u015f\u0131 etiketlerini g\u00fcncelleyin.<\/li>\n<\/ul>\n\n\n\n<p>NEC 240.87, 1200 amper veya daha y\u00fcksek de\u011ferdeki devre kesiciler i\u00e7in ark enerjisi azaltma y\u00f6ntemleri gerektiren bir kod b\u00f6l\u00fcm\u00fcd\u00fcr. Bu, a\u015fa\u011f\u0131dakilerin g\u00fcvenli\u011fini art\u0131rmay\u0131 ama\u00e7lamaktad\u0131r <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/tr\/2024\/06\/11\/ark-parlamalarinin-derinlemesine-elektrik-ariza-analizi-ve-denetimleri-ile-nasil-iliskili-oldugu\/'>elektrik sistemleri ve ark risklerini azaltmak<\/a> hatalar. Elektrik uzmanlar\u0131 ark enerjisini azaltma y\u00f6ntemlerini ve NEC 240.87'ye uymak i\u00e7in gerekli ad\u0131mlar\u0131 bilmelidir.<\/p>","protected":false},"excerpt":{"rendered":"<p>A Guide for Electrical Professionals for the 2023 NEC edition. What is NEC 240.87? NEC 240.87 is a code section in the National Electrical Code (NEC) that requires arc energy reduction methods for circuit breakers rated at 1200 amps or higher. Arc energy is the amount of heat and light produced by an electrical arc [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":4267,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_mbp_gutenberg_autopost":false,"_pgmb_is_evergreen":true,"_pgmb_ap_template_id":0,"iawp_total_views":218,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electrical"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.6.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"A Guide for Electrical Professionals for the 2023 NEC edition. What is NEC 240.87? 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