文章来源：http://www.trcables.com/ 作者：上海嗨润 发布时间：：2018-01-19 14:20 浏览次数：次
|
Conductor |
90℃ |
|||||
|
Nominal cross- |
Single core |
Two core |
Three core & four core |
|||
|
0.5 |
10 |
8.5 |
7 |
|||
|
0.75 |
13 |
11 |
9 |
|||
|
1 |
18 |
15 |
13 |
|||
|
1.5 |
23 |
20 |
16 |
|||
|
2.5 |
30 |
26 |
21 |
|||
|
4 |
40 |
34 |
28 |
|||
|
6 |
52 |
44 |
36 |
|||
|
10 |
72 |
61 |
50 |
|||
|
16 |
96 |
82 |
67 |
|||
|
25 |
127 |
108 |
89 |
|||
|
35 |
157 |
133 |
110 |
|||
|
50 |
196 |
167 |
137 |
|||
|
70 |
242 |
206 |
169 |
|||
|
95 |
293 |
249 |
205 |
|||
|
120 |
339 |
288 |
237 |
|||
|
150 |
389 |
331 |
273 |
|||
|
185 |
444 |
377 |
311 |
|||
|
240 |
522 |
444 |
366 |
|||
|
300 |
601 |
511 |
420 |
|||
|
|
d.c. |
a.c. |
d.c. |
a.c. |
d.c. |
a.c. |
|
400 |
690 |
670 |
587 |
570 |
483 |
469 |
|
500 |
780 |
720 |
663 |
612 |
546 |
504 |
|
500 |
890 |
780 |
757 |
663 |
623 |
546 |
Note
1. Maximum permissible service temperature of the conductor is 90℃.
2. The current ratings given above are based on an ambient air temperature of 45℃.
3. The current ratings given above are for 6 cables of less bunched or laid together in flat formation. When more than 6 cables are bunched or laid close together, the current ratings
given above should be multiplied by correction factor 0.85.
4. For cables with more than four core cables, the current ratings are calculated by the following formula.
I=I1/N1/3
I1: Current for single core cable
N: Number of cores
5. Correction factors for various ambient air temperature
|
Maximum |
Correction factors for ambient air temperature |
|||||||||
|
℃ |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
70 |
75 |
80 |
|
90 |
1.10 |
1.05 |
1.00 |
0.94 |
0.88 |
0.82 |
0.74 |
0.67 |
0.58 |
0.47 |
