電導綫問題

2007-07-12 6:06 am
630mm² 4CXLPE/SWA/PVC cu Cable and Aluminium Cable

how many current can carry out and how many voltage drop per Km
更新1:

甘就用單股既啦,唔之重有無人能夠答更好既,因爲個圖係甘話。

更新2:

個師父話負荷500A,長度係500meter。

回答 (1)

2007-07-13 3:26 am
✔ 最佳答案
咦?630mm² 4CXLPE/SWA/PVC cu Cable and Aluminium Cable?
630mm² 好似無4股既,就算有都好大條,我就未用過,單條就有

資料如下 :

630mm² 1C cu/XLPE/SWA/PVC Copper Cable
method (1) 669A method (11) 728A
Vd = r=0.105 x=0.165 z=0.195


600mm² 1C al/XLPE/SWA/PVC Aluminium Cable
method (1) 626A method (11) 669A
Vd = r=0.160 x=0.130 z=0.210

2007-07-13 09:46:51 補充:
既然係甘就同你計埋啦銅綫 = Cu( 0.195 x 500 x 500 ) / 1000 = 48.75 Vd 如果380V 既電壓降 = 48.75Vd / 380V = 12.83% 係唔能夠用既 因爲 380 - 48.75 = 331.25V如果11000V 既電壓降 = 48.75Vd / 11000V = 0.443% 就能夠用 因爲 11000 - 48.75 = 10951.25V

2007-07-13 09:47:08 補充:
鋁綫 = Al( 0.210 x 500 x 500 ) / 1000 = 52.50 Vd如果380V 既電壓降 = 52.50Vd / 380V = 13.82% 係唔能夠用既 因爲 380 - 52.5 = 327.5V 如果11000V 既電壓降 = 52.5Vd / 11000V = 0.477% 就能夠用 因爲 11000 - 52.5 = 10947.5V

2007-07-13 09:49:46 補充:
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