The story behind the "inverted" Apple "inverted" the story behind Apple's easy identification of Apple products not only because of its unique shape design, but also the iconic logo is an important element to convey information. In some of the early films, Apple's PowerBook and iBook appearance rates were relatively high. If you look carefully, you will find that the Apple logo on the top of these notebooks is often inverted. Apple once maintained such a design, and it was not until years later that it "disordered anyway."
Joe Moreno, a former senior web application engineer at Apple, told an interesting story behind the "inverted" Apple on his personal blog on Sunday.
At the time, there was a system called “Can We Talk†inside Apple. Any employee who had any questions but was not convenient to report to the manager or a higher level of staff could submit the problem to the Human Resources website “Can We Talkâ€. "In the system. So, some people ask questions:
“Why is the logo inverted when the Apple notebook opens the front cover?â€
The answer given by the Apple design team is that if the logo is to be presented to the user, the logo must be inverted if the front cover is closed. This is a dilemma. In any case, there is always one side that is upside down. The design team believes that the user's habit should be to open the notebook from the direction of the logo. If the logo is inverted at the beginning, it is likely to affect the user's use. At the time, CEO Steve Jobs always emphasized that the user experience is supreme, so meeting the needs of users is placed on the viewer's feelings.
Is it really a good choice to ignore the observer's feelings? It takes only a few seconds to open the front cover of the notebook, and the user's "wrong" of the viewer lasts longer. Despite the controversy, a few years later, Jobs changed his mind and turned the logo back.
Sometimes scientific research can be wrong, not because of a mistake, but because you are not digging deep enough.
Joe Moreno commented.
Maybe Apple can consider gravity sensing.
- Operating characteristics
1. Rated voltage U0/U: 0.6/1kV
2. Max.permissible continuous temperature:
PVC,PE insulated aerial cables:70℃
XLPE insulated aerial cables:90℃
3. Max. short-circuit temperature of the conductor shall not exceed:
PVC insulated aerial cables:160℃;
PE insulated aerial cables:130℃;
XLPE insulated aerial cables:250℃.
4. The installation ambient temperature should not below -20℃.
5. The bending radiuses of cables are recommended as follows:
When the diameter of cables less than 25mm: not less than 4 times the diameter of cables;
When the diameter of cables not less than 25mm: not less than 6 times the diameter of cables.
6. When the cables use in alternating current system, rated voltage of cables should be at least equal the rated voltage of the system;
When the cables use in direct current system, rated voltage should be not greater than 1.5 times of the rated voltage of the cables.
- Type of cables
|
Type |
Name |
Main Usage |
|
JKV |
Copper conductor PVC insulated aerial cables |
The cables fit for overhead fixed-installation, service line and so on. |
|
JKLV |
Aluminum conductor PVC insulated aerial cables |
|
|
JKY |
Copper conductor PE insulated aerial cables |
|
|
JKLY |
Aluminum conductor PE insulated aerial cables |
|
|
JKYJ |
Copper conductor XLPE insulated aerial cables |
|
|
JKLYJ |
Aluminum conductor XLPE insulated aerial cables |
|
|
JKLGV |
ACSR conductor PVC insulated aerial cables |
|
|
JKLGY |
ACSR conductor PE insulated aerial cables |
|
|
JKLGYJ |
ACSR conductor XLPE insulated aerial cables |
- Production range of cable
|
Type |
Cores Number |
Rated Voltage KV |
Nominal Cross Section mm2 |
|
JKV,JKLV,JKLHY,JKY, JKLY,JKLHY,JKYJ,JKLYJ, JKLHYJ,JKLGV,JKLGY JKLGYJ |
1 |
0.6/1 |
10~240 |
|
2+4 |
10~240 |
||
|
JKLV,JKLY,JKLYJ |
3+K* |
10~240 |
- Construction of cable
- Conductor
- Steel core
- Insulation
- Conducor screen
- Construction and main technical data
|
0.6/1KV single-core, insulated Aerial Cable,ABC Cable |
|||||||||
|
Nominal cross-sectional area of conductor |
Max. Diameter of cable |
Cable calculated Weight |
Min. Tensile force of cable |
Current carrying |
|||||
|
JKY JKYJ |
JKLY JKLYJ |
JKV |
JKLV |
Cu |
Al |
in air |
|||
|
Cu |
Al |
||||||||
|
mm2 |
mm |
kg/km |
kg/km |
kg/km |
kg/km |
N |
N |
A |
A |
|
16 |
8.0 |
178 |
80 |
176 |
77.3 |
5486 |
2512 |
84 |
67 |
|
25 |
9.4 |
266 |
112 |
277.7 |
119.9 |
8465 |
3762 |
107 |
88 |
|
35 |
11.0 |
366 |
150 |
375.0 |
156.1 |
11731 |
5177 |
134 |
108 |
|
50 |
12.3 |
510 |
200 |
501.3 |
205.4 |
16502 |
7011 |
172 |
136 |
|
70 |
14.1 |
697 |
264 |
706.5 |
278.8 |
23461 |
10354 |
207 |
168 |
|
95 |
16.5 |
945 |
358 |
974.4 |
383.3 |
31759 |
13727 |
257 |
208 |
|
120 |
18.1 |
1175 |
435 |
1209.8 |
460.7 |
39911 |
17339 |
295 |
240 |
|
150 |
20.2 |
1470 |
512 |
1488.6 |
570.7 |
49505 |
21033 |
360 |
276 |
|
185 |
22.5 |
1813 |
590 |
1865.0 |
714.3 |
61846 |
26732 |
412 |
320 |
|
240 |
25.6 |
2343 |
668 |
2437.0 |
918.5 |
79823 |
34679 |
496 |
384 |
|
0.6/1KV Two-core, insulated aerial cable |
||||||||||
|
Nominal cross-sectional area of conductor |
Max. Diameter of cable |
Cable calculated Weight |
Min. Tensile force of cable |
Current carrying |
||||||
|
JKV |
JKY JKYJ |
JKLV JKLHV |
JKLY JKLYJ JKJHY JKLHYJ |
Hard copper |
Aluminum |
Aluminum Alloy |
in air |
|||
|
Cu |
Al |
|||||||||
|
mm2 |
mm |
kg/km |
kg/km |
kg/km |
kg/km |
N |
N |
N |
A |
A |
|
10 |
11.6 |
228 |
216 |
102 |
89 |
10972 |
5024 |
8044 |
59 |
44 |
|
16 |
14.4 |
361 |
343 |
158 |
140 |
16930 |
7524 |
12568 |
102 |
79 |
|
25 |
16.8 |
521 |
500 |
217 |
195 |
22462 |
10354 |
17600 |
138 |
107 |
|
35 |
19.6 |
733 |
704 |
302 |
272 |
33004 |
14022 |
25138 |
170 |
132 |
|
50 |
22.2 |
969 |
937 |
387 |
352 |
46922 |
20708 |
35192 |
209 |
162 |
|
70 |
25.2 |
1336 |
1300 |
513 |
473 |
63518 |
27454 |
47760 |
266 |
207 |
|
95 |
29.4 |
1882 |
1835 |
715 |
662 |
79822 |
34678 |
60328 |
332 |
257 |
|
120 |
32.2 |
2348 |
2297 |
872 |
815 |
99010 |
42066 |
75412 |
384 |
299 |
|
150 |
36.2 |
2954 |
2889 |
1098 |
1025 |
123692 |
53464 |
93006 |
442 |
342 |
|
185 |
40.0 |
3536 |
3456 |
1320 |
1231 |
159646 |
69358 |
120658 |
515 |
399 |
|
240 |
45.3 |
4609 |
4510 |
1709 |
1597 |
199576 |
86698 |
150822 |
615 |
476 |
|
0.6/1KV Four-core, insulated aerial cable |
||||||||||
|
Nominal cross-sectional area of conductor |
Max. Diameter of cable |
Cable calculated Weight |
Min. Tensile force of cable |
Current carrying |
||||||
|
JKV JKY JKYJ |
JKLV JKLHV |
JKLY JKLYJ |
JKJHY JKLHYJ |
Hard copper |
Aluminum |
Aluminum Alloy |
in air |
|||
|
Cu |
Al |
|||||||||
|
mm2 |
mm |
kg/km |
kg/km |
kg/km |
kg/km |
N |
N |
N |
A |
A |
|
10 |
11.6 |
456 |
434 |
204 |
179 |
13884 |
6600 |
10056 |
59 |
44 |
|
16 |
14.4 |
721 |
678 |
316 |
280 |
21944 |
10048 |
160088 |
102 |
79 |
|
25 |
16.8 |
1040 |
1001 |
433 |
390 |
33860 |
15048 |
25136 |
138 |
107 |
|
35 |
19.6 |
1464 |
1410 |
504 |
546 |
46924 |
20708 |
35200 |
170 |
132 |
|
50 |
22.2 |
1936 |
1876 |
773 |
706 |
66008 |
28044 |
50276 |
209 |
162 |
|
70 |
25.2 |
2669 |
2601 |
1025 |
948 |
93844 |
41416 |
70384 |
266 |
207 |
|
95 |
29.4 |
3761 |
3672 |
1429 |
1327 |
127036 |
54908 |
95520 |
332 |
257 |
|
120 |
32.2 |
4692 |
4597 |
1744 |
1632 |
159644 |
69356 |
120656 |
384 |
299 |
|
150 |
36.2 |
5903 |
5782 |
2197 |
2054 |
198020 |
84132 |
150824 |
442 |
342 |
|
185 |
40.0 |
7065 |
6916 |
2641 |
2466 |
247684 |
106928 |
186012 |
515 |
399 |
|
240 |
45.3 |
9210 |
9026 |
3418 |
3199 |
319282 |
138716 |
241316 |
615 |
476 |
|
0.6/1KV Three-core and the weight bearing insulated aerial cable |
||||
|
Nominal cross-sectional area of conductor |
Cable approx. diameter |
Cable approx Weight |
Tensile force of cable |
|
|
JKLY |
JKLV JKLYJ |
Aluminum |
||
|
mm2 |
mm |
Kg/km |
Kg/km |
N |
|
10 |
12.5 |
153 |
134 |
4950 |
|
16 |
15.5 |
237 |
209 |
7536 |
|
25 |
18.1 |
325 |
292 |
11286 |
|
35 |
21.1 |
453 |
408 |
15531 |
|
50 |
23.9 |
580 |
528 |
21033 |
|
70 |
27.1 |
769 |
710 |
31062 |
|
95 |
31.7 |
1072 |
993 |
41181 |
|
120 |
34.7 |
1308 |
1222 |
52017 |
|
150 |
39.0 |
1647 |
1538 |
63099 |
|
185 |
43.1 |
1981 |
1846 |
80196 |
|
240 |
48.9 |
2563 |
2935 |
104037 |
|
0.6/1KV Single-core Copper aluminum alloy insulated aerial cable |
||||
|
Nominal cross-sectional area of conductor Al/Fe |
Single Cable approx. diameter |
Single Cable approx Weight |
Single Tensile force of cable |
|
|
JKLGV |
JKLGYJ JKLGY |
|||
|
mm2 |
mm |
Kg/km |
Kg/km |
N |
|
25/4 |
9 |
143 |
131 |
9290 |
|
35/6 |
10.6 |
199 |
183 |
12630 |
|
50/8 |
11.9 |
262 |
243 |
16870 |
|
50/30 |
13.9 |
447 |
424 |
42620 |
|
70/10 |
13.7 |
355 |
334 |
23390 |
|
70/40 |
15.9 |
603 |
578 |
58300 |
|
95/15 |
16.1 |
486 |
457 |
35000 |
|
95/20 |
16.3 |
514 |
484 |
37200 |
|
95/55 |
18.5 |
827 |
793 |
78110 |
|
120/7 |
16.8 |
486 |
455 |
27570 |
|
120/20 |
17.6 |
589 |
557 |
41000 |
|
120/25 |
17.9 |
634 |
602 |
47880 |
|
120/70 |
20.4 |
1025 |
987 |
98370 |
|
150/8 |
18.7 |
610 |
572 |
32860 |
|
150/20 |
19.4 |
702 |
663 |
46630 |
|
150/25 |
19.7 |
748 |
708 |
54110 |
|
150/35 |
20.2 |
832 |
791 |
65020 |
|
185/10 |
20.7 |
751 |
704 |
40880 |
|
185/25 |
21.6 |
872 |
823 |
59420 |
|
185/30 |
21.8 |
916 |
867 |
64320 |
|
185/45 |
22.4 |
1029 |
978 |
80190 |
|
210/10 |
21.9 |
847 |
798 |
45140 |
|
210/25 |
22.8 |
981 |
930 |
65990 |
|
210/35 |
23.1 |
1042 |
989 |
74250 |
|
210/50 |
23.7 |
1162 |
1108 |
90830 |
|
240/30 |
24.4 |
1122 |
1061 |
75620 |
|
240/40 |
24.7 |
1182 |
1120 |
83370 |
|
240/55 |
25.47 |
1327 |
1263 |
102100 |
|
300/15 |
26.2 |
1196 |
1125 |
68060 |
|
300/20 |
26.4 |
1242 |
1171 |
75680 |
|
300/25 |
26.7 |
1294 |
1222 |
83410 |
|
300/40 |
27.1 |
1392 |
1319 |
92220 |
|
300/50 |
27.5 |
1476 |
1401 |
103400 |
|
300/70 |
28.3 |
1662 |
1585 |
128000 |
Aerial Insulated Cable,Aerial Bundled Cable,Digital Aerial Cable,ABC Cable,Aerial Cable
Huayuan Gaoke Cable Co.,Ltd. , http://www.bjhygkcable.com