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Retningslinjer for valg av ledertverrsnitt for trefase- motorer avhengig av kabellengden.

Det forutsettes fast opplagt kabel i bygninger eller bevegelig ledning, med tillatt belastning etter FEB 91. Gjelder 230V.

Det er ved beregningen forutsatt et maksimalt spenningsfall på 3%. I de fleste tilfelle er det motstrømmen og tillatt sikringsstørrelse som avgjør valget av ledertverrsnittet.

         
Motoreffekt Kabellengde i meter
kW HK 30 50 100
    mm2 mm2 mm2
0,5 0,68 1,5 1,5 1,5
1,0 1,36 1,5 1,5 1,5
1,5 2,04 1,5 1,5 2,5
2,0 2,76 1,5 2,5 4,0
2,5 3,40 1,5 2,5 4,0
         
3,0 4,08 2,5 2,5 6,0
3,5 4,78 2,5 4,0 6,0
4,0 5,44 2,5 4,0 6,0
4,5 6,12 4,0 4,0 10,0
5,0 6,80 4,0 4,0 10,0
         
6,0 8,16 6,0 6,0 10,0
7,0 9,52 10,0 10,0 16,0
8,0 10,90 10,0 10,0 16,0
9,0 12,20 10,0 10,0 16,0
10,0 13,60 16,0 16,0 16,0
         
12,0 16,30 16,0 16,0 16,0
14,0 19,00 16,0 16,0 25,0
16,0 21,80 16,0 16,0 25,0
18,0 24,50 25,0 25,0 35,0
20,0 27,20 25,0 25,0 35,0
         
22,0 29,90 25,0 25,0 35,0
24,0 32,60 35,0 35,0 35,0
26,0 35,40 35,0 35,0 35,0
28,0 38,10 35,0 35,0 50,0
30,0 40,80 35,0 35,0 50,0
         
35,0 47,60 50,0 50,0 50,0
40,0 54,40 70,0 70,0 70,0
45,0 61,20 70,0 70,0 70,0
50,0 68,00 70,0 70,0 70,0
55,0 74,80 70,0 70,0 70,0
         
60,0 81,60 95,0 95,0 95,0
65,0 88,40 120,0 120,0 120,0
70,0 95,20 120,0 120,0 120,0
75,0 102,00 150,0 150,0 150,0
80,0 109,00  150,0 150,0 150,0
         
85,0 116,00 185,0 185,0 185,0
90,0 122,00 185,0 185,0 185,0
95,0 129,00 185,0 185,0 185,0
100,0 136,00 240,0 240,0 240,0
         
         

Informasjonen er opprinnelig hentet med bakgrunn fra Nexans Norway.

Forbehold: Alt ovenfor av standarder, retningslinjer mm. er gitt med basis av alminnelig kjente tekniske håndbøker, allmenn informasjon, og etter beste overbevisning og i god tro, og uten ansvar for mulige feil.


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