The line cost is an important economic index for power supply enterprise , and gives direct impact to the economic benefit of power supply enterprise .It plays an important part to analyse the reason of line cost and take countermeasures .The paper puts empha-sis on analysing the reason for low voltage line cost and taking corresponding countermeasures , which can be taken as the guidance for reducing power supply cost and increasing the profit .%线损是供电企业的一个非常重要的经济指标，直接影响到供电企业的经济效益。无论从企业自身利益还是从节能减排等方面考虑，全面分析线损产生的原因并采取相应的对策降低线损，都具有十分重要的意义。本文重点分析了低压配电系统线损产生的主要原因和采取的措施，对供电企业降损节能，提高经济效益有一定的参考价值。
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