Apakah yang di maksud dengan proteksi internal atau penangkap petir

Arus transient yang mengakibatkan kerusakan peralatan

Sementara overvoltages adalah sangat singkat peningkatan tegangan antara dua konduktor atau antara konduktor dan tanah. Mereka dapat disebabkan oleh atmosfer listrik discharge (petir), dengan switching atau oleh listrik kesalahan (kontak dengan bumi atau hubungan pendek). Meskipun overvoltages sementara telah ada sejak penciptaan jaringan listrik, kebutuhan untuk perlindungan yang saat ini banyak lebih besar. Hal ini karena teknologi membuat komponen listrik yang pernah lebih kecil dan lebih sensitif terhadap gangguan elektromagnetik.

Komponen eletronika

Efek dilakukan atau diinduksi arus akibat lucutan atmosfer baik dari jauh menyerang, petir antara awan atau oleh beralih operasi mesin berat ( yang menyebabkan overvoltages mirip dengan yang dihasilkan oleh petir menyerang ), dapat menyebabkan merusak peralatan elektronik dan kerusakan pada instalasi listrik.Atmosfer discharge menghasilkan tegangan puncak di sinyal, tetapi juga sangat tinggi dengan durasi. yang sangat singkat

Terkait dengan arus langsung petir menyerang bisa mencapai nilai di atas 100ka, dengan demikian bahkan yang efek sekunder membawa arus yang dapat menyebabkan kerusakan penting ke garis dan peralatan mereka terhubung ke.Sebagian besar kabel listrik yang dilengkapi dengan langkah pengamanan untuk menghindari short-circuits dan sengatan listrik untuk orang. Hampir setiap papan listrik berisi pelindung seperti pemutus sirkuit otomatis dan RCCB. Namun mereka tidak dapat menghindari konsekuensi dari overvoltages sementara, karena reaksi mereka jauh lebih lambat daripada puncak tegangan yang muncul. Sebuah contoh khusus adalah bahwa dari UPS (terganggu Power Supply). Elemen-elemen ini menjamin pasokan listrik peralatan terhubung bahkan ketika ada pemotongan pasokan listrik. Sebagian besar peralatan ini juga memiliki rectifier saat ini yang memungkinkan suplai listrik yang stabil dalam variasi 15%. Namun, karena mereka peralatan canggih dengan teknologi microprocessor dan sangat sensitif terhadap overvoltages, mereka bisa menderita kerusakan serius ketika mengalami sementara overvoltages.

Perangkat pelindung gelombang melengkapi perlindungan yang disebutkan. Pada umumnya mereka tidak diaktifkan dengan kecil deformasi di overload sinyal atau jaringan. Namun, mereka menanggapi di Nano tegangan puncak dan mampu arus petir drive (utama atau sekunder) ke dunia, menjaga peralatan terhubung.

Konsekuensi dari overvoltages yang paling khas overvoltages sementara yang disebabkan oleh operasi kuat mesin.Namun, yang paling merusak yang disebabkan oleh atmosfer discharge.Gelombang efek berkisar dari sederhana bekerja gangguan singkat terhadap total kerusakan peralatan sensitif: gangguan gangguan sistem operasi, kehilangan dan korupsi, data dijelaskan kegagalan, komputer dll.

Sementara degradcing overvoltages menurunkan, tanpa pengguna sadari, komponen elektronik dan sirkuit, mengurangi peralatan hidup dan meningkatkan kemungkinan kegagalan.Kerusakan parah sementara atas tegangan bisa merusak komponen, papan sirkuit dan bahkan bisa membakar atau menghancurkan peralatan serta memproduksi awal api.Mereka terutama mempengaruhi elektronik, komputer dan sistem telekomunikasi.

Semua efek ini menyiratkan gangguan ini di normal bekerja kondisi komputer dan dengan demikian hasil dalam kerugian ekonomi karena untuk penundaan dalam produktivitas.Yang lebih penting, efek ini dapat membawa risiko untuk orang-orang yang harus dihindari di semua biaya yang sesuai untuk keselamatan dan kesehatan pekerja-: hukum persyaratan minimum kesehatan dan keamanan instalasi digunakan oleh pekerja dan tim. bekerjaR.d. / 1215 97.Lampiran ii, titik 12. Setiap instalasi � atau mesin yang digunakan untuk bekerja tujuan, dan yang dapat dihubungi oleh petir, harus dilindungi terhadap efek menggunakan adecuate perangkat dan langkah-langkah.

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