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Warystor - Forum Elektroniczne

Warystor

Zadaj tu pytanie, jeśli nie wiesz w jaki sposób zrobić układ realizujący założone funkcje.
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movzx
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Postautor: movzx » wt 05 wrz 2006, 9:00

1+2):
"14" oznacza energie (w joulach bodajze) ktora tenze warystor moze pochlonac bez zniszczenia. Mozna zastosowac warystor o wiekszej wartosci, bedzie po prostu fizycznie wiekszy.
"271" czy "275" to napiecie zadzialania, roznica 4V (na dodatek w dol) nikomu krzywdy nie zrobi, wiec wymieniac prosze :)

3):
Warystor zabezpiecza elektronike przed przepieciami: w momencie kiedy napiecie zasilania wzrosnie powyzej tego opisanego na obudowie, jego rezystancja gwaltownie maleje i "zwiera" impuls przepieciowy, czesto przy tej okazji wywalajac oczywiscie bezpiecznik.
Jesli impuls przepieciowy jest duzy (a w tym wypadku byl), warystor moze ulec zniszczeniu, w mniej lub bardziej spektakularny sposob zreszta (od lekkiego nadpalenia po "zostana tylko nozki"). Zwykle dostaje wtedy permanentnego zwarcia, w kazdym razie do wymiany, kosztuje toto grosze.

Oczywiscie panowie w serwisie chcieliby najlepiej wymienic cala lodowke, ale skoro producent zastosowal warystory (i zapewne gdzies wczesniej bezpieczniki) to prawdopodobnie wystarczy wymienic jedno i drugie, problem z glowy i 500 w kieszeni :)
Pozdr.

tenap
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Postautor: tenap » wt 05 wrz 2006, 14:18


movzx
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Postautor: movzx » śr 06 wrz 2006, 0:13


elele
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Postautor: elele » pt 08 wrz 2006, 16:52

[quote="movzx"]1+2):
"14" oznacza energie (w joulach bodajze) ktora tenze warystor moze pochlonac bez zniszczenia.

Pośrednio msz rację, jednak jest to po prostu średnica tego warystora, a zdolność absorpcji aenergii zależy właśnie od średnicy. Czym większa średnica tym większą ilość energii bez szkody dla siebie warystor może pochłonąć, a właściwie to zewrzeć, bo takie ma zadanie.


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