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172 Ulošci osigurača Fuse - links 1 - krivulja prekidanja / operating curve 2 - krivulja taljenja / melting curve KRIVULJA PREOPTEREĎENJA overloading curve 1 2 3 X I n 4 10 3 10 2 10 1 10 0 10 -1 10 -2 10 t (s) 1 1,2 6,3 4 50 100 A - struja kratkog spoja sa 80 % istosmjerne komponente ( r = 1.8 ) short circuit current with 80 % d.c. component B - struja kratkog spoja bez istosmjerne komponente ( r = 1 ) short circuit current without d.c. component 3UHNLGQD PRġ 5 MREŘAMA POGONSKOG NAPONA !# 6 ULOŃCI OSIGURAĐA SA aM karakteristikom pouzdano prekidaju 120 kA eff kod napona 1,1 U n I COS UZ ISTOVREMENO VELIKO STRUJNO OGRANIĐENJE VIDI $IJAGRAM PROPUŃTENIH STRUJA Breaking capacity Fuse - links with aM characteristic definitely break 20 kA r.m.s. in networks AC 500/690 V at voltage 1,1 U n and cos = 0,2 with a great current limiting - see Cut - off current diagram. Dijagram propuštenih struja; AC 400/500/690 V Cut - off current diagram; AC 400/500/690 V 2ÏHNLYDQD VWUXMD N$ eff ) / Prospective current (kA r.m.s. ) 3URSXĞWHQD VWUXMD N$ Cut-off current (kA) 0.1 0.2 0.4 0.6 1 2 3 4 6 8 10 20 30 40 60 80 120 0.2 0.3 0.4 0.6 0.8 1 2 3 4 6 8 10 20 30 40 60 80 100 16 A 20 A 25 A,32A 35 A 40 A 50 A 63 A 80 A 100 A 125 A 160 A 200 A 400 A 500 A 630 A A B KARAKTERISTIKA CHARACTERISTIC aM 4 x I n 6,3 x I n 8 x I n 10 x I n 12,5 x I n 16 x I n 25 x I n 50 x I n Max. vrijeme prekidanja Max. operating time (s) - 60 - - 0.5 0.15 0.04 0,009 Max. vrijeme taljenja Max. melting time (s) 60 - 0.5 0.2 - - - - Područje vrijeme - struja ; AC 500 / 690 V Time - current range ; AC 500 / 690 V Prekidna vremena prema HRN EN 60269 i DIN VDE 0636 Breaking times according to HRN EN 60269 and DIN VDE 0636