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STRUJNO OPTEREĆENJE KABELA<br />
Strujno opterećenje kabela je potrebno tako ograničiti, da se sva količina topline<br />
razvijena u <strong>vodiči</strong>ma kabela može slobodno prenijeti u okolni prostor. Odvođenje<br />
topline ovisi o unutarnjem toplinskom otporu između vodiča i vanjske površine<br />
kabela i toplinskog otpora okoline (prostora ugradbe kabela). Unutarnji toplinski<br />
otpor je određen konstrukcijom kabela i svojstvom ugrađenog materijala i praktički je<br />
nepromjenjiv za određeni tip kabela.<br />
Kod određivanja toplinskog otpora okoline, treba voditi računa o:<br />
- specifičnom otporu zemljišta<br />
- temperaturi okoline<br />
- izloženosti sunčevom svjetlu (kod polaganja u zraku)<br />
- načinu polaganja i zaštite kabela<br />
- broju paralelno položenih kabela<br />
- utjecaju ostalih instalacija (npr.: parovodi, itd.)<br />
CURRENT RATINGS OF CABLES<br />
The current load of the cables has to be limited to the extent that the whole quantity<br />
of heat generated in the conductors can be dissipated in the surrounding area. The<br />
heat dissipation depends on the inside thermal resistance between the conductor<br />
and the outside surface of the cable, and the thermal resistance of the ambient. The<br />
construction of a cable and the properties of its components decide its inside thermal<br />
resistance, which is practically unchangeable for a specific cable type. By stating the<br />
thermal resistance of the suroudings, one should calculate with:<br />
- specific soil resistivity<br />
- ambient temperature<br />
- exposure to sun (by laying in the air)<br />
- mode of laying and cable protection<br />
- number of parallelly laid cables<br />
- influence of other installations (e.g. steam pipelines, etc.)<br />
Tablica 4 - Strujno opterećenje kabela sa Cu <strong>vodiči</strong>ma i PVC izolacijom<br />
Table 4 - Current Ratings of Cables with Cu Conductors and PVC Insulation<br />
STRUJNO OPTEREĆENJE (A) / CURRENT RATINGS (A)<br />
Nazivni presjek vodiča mm 2<br />
1-žilni kabel<br />
Single-Core Cable<br />
2-žilni kabel<br />
2-Core Cable<br />
3 i 4-žilni kabel<br />
3 and 4-Core Cable<br />
Nominal Cross-Section of<br />
Conductor mm 2<br />
u zemlji<br />
in earth<br />
u zraku<br />
in air<br />
u zemlji<br />
in earth<br />
u zraku<br />
in air<br />
u zemlji<br />
in earth<br />
u zraku<br />
in air<br />
1,5<br />
2,5<br />
4<br />
6<br />
10<br />
16<br />
25<br />
35<br />
50<br />
70<br />
95<br />
120<br />
150<br />
185<br />
240<br />
300<br />
41<br />
55<br />
71<br />
90<br />
124<br />
160<br />
208<br />
250<br />
296<br />
365<br />
438<br />
501<br />
563<br />
639<br />
716<br />
845<br />
30<br />
39<br />
50<br />
62<br />
83<br />
107<br />
138<br />
164<br />
195<br />
238<br />
286<br />
325<br />
365<br />
413<br />
479<br />
539<br />
27<br />
35<br />
47<br />
59<br />
81<br />
107<br />
144<br />
176<br />
214<br />
270<br />
334<br />
389<br />
446<br />
516<br />
618<br />
711<br />
21<br />
28<br />
37<br />
47<br />
64<br />
84<br />
114<br />
139<br />
169<br />
213<br />
264<br />
307<br />
352<br />
406<br />
483<br />
552<br />
30<br />
41<br />
53<br />
66<br />
88<br />
115<br />
150<br />
183<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
17<br />
23<br />
37<br />
48<br />
65<br />
87<br />
118<br />
149<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
27<br />
36<br />
46<br />
58<br />
78<br />
101<br />
132<br />
159<br />
188<br />
232<br />
280<br />
318<br />
359<br />
406<br />
473<br />
535<br />
19,5<br />
26<br />
34<br />
43<br />
59<br />
78<br />
105<br />
129<br />
157<br />
1<br />
246<br />
285<br />
326<br />
374<br />
445<br />
510<br />
Tablica 5 - Strujno opterećenje kabela sa Cu <strong>vodiči</strong>ma i XLPE izolacijom<br />
Table 5 - Current Ratings of Cables with Cu Conductors and XLPE Insulation<br />
STRUJNO OPTEREĆENJE (A) / CURRENT RATINGS (A)<br />
Nazivni presjek vodiča mm 2<br />
Nominal Cross-Section of Conductor<br />
mm 2<br />
u zemlji<br />
in earth<br />
2-žilni kabel<br />
2-Core Cable<br />
u zraku<br />
in air<br />
u zemlji<br />
in earth<br />
3 i 4-žilni kabel<br />
3 and 4-Core Cable<br />
u zraku<br />
in air<br />
16<br />
25<br />
35<br />
50<br />
70<br />
95<br />
120<br />
150<br />
185<br />
240<br />
300<br />
125<br />
173<br />
205<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
108<br />
153<br />
185<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
111<br />
145<br />
174<br />
206<br />
254<br />
305<br />
348<br />
392<br />
444<br />
517<br />
585<br />
97<br />
132<br />
162<br />
197<br />
250<br />
308<br />
359<br />
412<br />
475<br />
564<br />
649<br />
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