描述

5X00622G01 導(dǎo)線的截面選擇

確定線路設(shè)計(jì)的氣象條件。對(duì)于在大氣中運(yùn)行的架空線路機(jī)械計(jì)算來(lái)說(shuō)，氣溫、風(fēng)速和履冰厚度三種氣象因素為重要。因此，應(yīng)根據(jù)當(dāng)?shù)氐挠嘘P(guān)氣象資料和當(dāng)?shù)匾延芯€路的運(yùn)行經(jīng)驗(yàn)進(jìn)行綜合考慮。根據(jù)廣東省梅州市氣象資料：（1）大風(fēng)速不大于25m/s，溫度為-5℃；（2）履冰厚度不大于5mm，溫度為-5℃；（3）高溫度不+40℃（4）低溫度不低于-40℃。上述資料可以確定：10kV配電線路選用LGJ型鋼芯鋁絞線，0.4kV配電線路采用架空絕緣電線，即鋁芯塑料線（BLV）型。 ??4.2導(dǎo)線的截面選擇。一般是按允許電壓損耗確定，同時(shí)滿足發(fā)熱條件和機(jī)械強(qiáng)度的要求。還應(yīng)根據(jù)負(fù)荷情況留有發(fā)展的裕度。但為了確保線路運(yùn)行質(zhì)量和安全，要求10kV線路及0.4kV主干線路截面不小于35mm2，三相四線的零線截面積不宜小于相線截面的50％，其余0.4kV分支線、接戶線均按實(shí)際用電設(shè)備容量具體確定。 [b]5 導(dǎo)線弧垂及排列方式的選擇 [/b]??5.1 導(dǎo)線弧垂的確定。導(dǎo)線的弧垂與導(dǎo)線的截面、氣象條件和電桿的檔距有關(guān)。根據(jù)氣象條件和運(yùn)行經(jīng)驗(yàn)，可通過(guò)查計(jì)算出不同檔距、不同溫度時(shí)的導(dǎo)線弧垂表。

5X00622G01 導(dǎo)線的截面選擇

Determine meteorological conditions for route design. For the mechanical calculation of overhead lines operating in the atmosphere, three meteorological factors, temperature, wind speed and ice thickness, are important. Therefore, comprehensive consideration should be made according to the relevant local meteorological data and the operation experience of the existing local lines. According to the meteorological data of Meizhou City, Guangdong Province: (1) the wind speed is not more than 25m/s, and the temperature is -5℃; (2) The ice thickness is not more than 5mm, and the temperature is -5℃; (3) The high temperature is not +40℃ (4) the low temperature is not less than -40℃. The above information can be determined: 10kV distribution line uses LGJ steel core aluminum stranded wire, 0.4kV distribution line uses overhead insulated wire, that is, aluminum core plastic wire (BLV) type. 4.2 Selection of cross section of wire. It is generally determined according to the allowable voltage loss, while meeting the requirements of heating conditions and mechanical strength. There should also be a margin for development according to the load situation. However, in order to ensure the quality and safety of the line operation, the cross-section of the 10kV line and 0.4kV trunk line is required to be not less than 35mm2, the neutral line cross-sectional area of the three-phase four-wire should not be less than 50% of the phase line cross-section, and the remaining 0.4kV branch line and access line are determined according to the actual capacity of electrical equipment. [b]5 Choice of wire sag and arrangement [/b] 5.1 Determination of wire sag. The sag of the wire is related to the cross section of the wire, weather conditions and the spacing of the pole. According to the weather conditions and operating experience, the traverse sag table can be calculated at different intervals and temperatures.

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Chengdu Sunshine Xihe Co., Ltd. specializes in one-stop procurement consulting for imported industrial spare parts, offering original equipment and professional discontinued parts services. We are committed to providing efficient and reliable automation solutions for our customers. Customer support fast responseThe network of partners spans all continentsGlobal partner networkAlways achieve more delivery, be it parts, service or speed



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