Technical data of electrical conductor
Copper strips (≥99.9%Cu).
Surface: uncoated or tinned.
Resistivity: ≤1.785μΩcm
2/cm.
Electrical conductivity: ≥55 Sm/mm
2.
Tensile strength: ≥200N/mm
2.
Extensibility: ≥30%.
Technical data of insulation
Material: PVC.
Color: black.
Thickness: 1.8-2.1mm.
Shore hardness: A70-80.
Electrical strength: ≥23kV/mm.
Oxygen index: 30%.
Flame retardant; self-extinguishing.
Elasticity: ≥180% after 7-day aging-test with 135℃.
Tensile strength: ≥20MPa.
Technical data of flexible insulated busbars
Operating temperature: -30℃ to +105℃.
Operating voltage: 750V.
Voltage withstand performance with 15min / 50Hz AC:
- between flexible insulated busbar and earth: ≥15kV.
- between two flexible insulated busbars: ≥30kV.
Main features of flexible insulated busbars
Easy assembly: it could be easily bended and fixed with hands or easy tools.
Possibility of reducing sizes of the equipment:
- Due to favorable thermal radiation properties, the flexible insulated busbars can handle
heavier current loads than solid busbars of the same cross-section.
- Due to good insulating performance of the PVC, it could be possible to reduce the
distances between different flexible insulated busbars and between the flexible insulated
busbars and earth.
- The bending-radius could be smaller than that of normal cable or solid copper bars, so
that the connections could be more simple and short, and visually it could have better effect.
Lower temperature rise on the flexible insulated busbars than on normal copper bars.
High flexibility: no problem with vibrations or thermal expansions.
Application of flexible insulated busbars
The flexibility of the bars makes it possible to install them into difficult equipment or small places very easily. They will be particularly well used as connectors in switchgears and between transformers, switching devices and prefabricated power networks.
Dimensions and ampacity
Standard conductor: copper (99.9%), uncoated or tinned.
Standard length: 2m (for 1-layer busbar, 25m is possible).
Cross-section: up to 1200mmm
2.
Color of insulation: black.
Ampacity: values are only for information because the actual ampacity is related to the
application conditions.
Dimensions and
Qty. of strips
|
Cross section (mm2) |
Ampacity (A) |
Dimensions and
Qty. of strips |
Cross section (mm2) |
Ampacity (A) |
|
△T=20K (3) |
△T=40K (4)
|
△T=50K (5) |
△T=20K (3) |
△T=40K (4) |
△T=50K (5) |
|
15.5*0.8*2 |
24.8 |
125 |
175 |
200 |
40*1*2 |
80 |
240 |
330 |
380 |
|
15.5*0.8*3 |
37.2 |
160 |
210 |
240 |
40*1*3 |
120 |
330 |
480 |
540 |
|
15.5*0.8*4 |
49.6 |
195 |
265 |
295 |
40*1*4 |
160 |
400 |
560 |
630 |
|
15.5*0.8*6 |
74.4 |
225 |
320 |
360 |
40*1*5 |
200 |
450 |
630 |
710 |
|
15.5*0.8*8 |
99.2 |
265 |
380 |
430 |
40*1*6 |
240 |
480 |
680 |
750 |
|
15.5*0.8*10 |
124 |
300 |
420 |
480 |
40*1*8 |
320 |
600 |
830 |
920 |
|
20*1*2 |
40 |
170 |
240 |
270 |
40*1*10 |
400 |
670 |
920 |
1030 |
|
20*1*3 |
60 |
230 |
320 |
360 |
50*1*3 |
150 |
400 |
570 |
650 |
|
20*1*4 |
80 |
270 |
380 |
440 |
50*1*4 |
200 |
490 |
700 |
790 |
|
20*1*5 |
100 |
300 |
430 |
490 |
50*1*5 |
250 |
540 |
780 |
880 |
|
20*1*6 |
120 |
330 |
470 |
530 |
50*1*6 |
300 |
590 |
840 |
950 |
|
20*1*8 |
160 |
400 |
560 |
620 |
50*1*8 |
400 |
680 |
1000 |
1130 |
|
20*1*10 |
200 |
420 |
580 |
650 |
50*1*10 |
500 |
750 |
1100 |
1300 |
|
24*1*2 |
48 |
200 |
280 |
320 |
63*1*5 |
315 |
650 |
900 |
1000 |
|
24*1*3 |
72 |
250 |
360 |
410 |
63*1*6 |
378 |
690 |
980 |
1100 |
|
24*1*4 |
96 |
280 |
410 |
460 |
63*1*8 |
504 |
840 |
1200 |
1350 |
|
24*1*5 |
120 |
330 |
470 |
530 |
63*1*10 |
630 |
920 |
1300 |
1450 |
|
24*1*6 |
144 |
360 |
510 |
570 |
80*1*5 |
400 |
700 |
1100 |
1230 |
|
24*1*8 |
192 |
420 |
590 |
670 |
80*1*6 |
480 |
780 |
1210 |
1360 |
|
24*1*10 |
240 |
500 |
700 |
790 |
80*1*8 |
640 |
950 |
1400 |
1570 |
|
32*1*2 |
64 |
230 |
320 |
360 |
80*1*10 |
800 |
1090 |
1550 |
1730 |
|
32*1*3 |
96 |
280 |
410 |
460 |
100*1*5 |
500 |
860 |
1250 |
1400 |
|
32*1*4 |
128 |
320 |
460 |
520 |
100*1*6 |
600 |
950 |
1380 |
1530 |
|
32*1*5 |
160 |
390 |
550 |
610 |
100*1*8 |
800 |
1100 |
1580 |
1760 |
|
32*1*6 |
192 |
440 |
620 |
700 |
100*1*10 |
1000 |
1220 |
1710 |
1920 |
|
32*1*8 |
256 |
510 |
720 |
822 |
100*1*12 |
1200 |
1300 |
1800 |
2010 |
|
32*1*10 |
320 |
600 |
840 |
930 |
|
|
|
|
|
Guidance for selecting the correct dimensions
The ampacities are related to the cross-sections and operating ambient temperature, as shown in above table. Therefore, three factors should be considered for deciding the dimensions:
Ampacity
Allowed temperature-rise on the bars
Width of the bars
The temperature-rise (△T) of bars can be calculated with following formula:
△T=Tr – Ta
Ta: ambient temperature
Tr: temperature of bars with rated current (pay attention: for general electrical apparatus, Tr should be ≤105℃).
Example (just for reference):
If your operating ambient temperature is 40
℃, and you need ampacity 510A with bar width ＜ 40mm, you could get allowed highest temperature-rise 65K (105℃-40℃=65K), so you could decide dimension 32×1×4. With this bar, the highest temperature-rise will be 50K with current 520A.
