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     (1) 电阻率低：铝线电缆的电阻率比铜线电缆约高 1" />
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                        <b>变压器铜线的优缺点</b>
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                            <span><i></i>发布时间：2023/6/20 8:52:27</span>
                            <span><i></i>浏览：614</span>
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                      <p> <p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;">铜价一直持续走高，给<a href="http://www.xdbyq.com/" target="_blank">变压器</a>生产厂家带来很大的冲击，今天来谈谈铜线的优缺点</span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(1)</span>电阻率低：铝线电缆的电阻率比铜线电缆约高<span>1.68</span>倍。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(2)</span>延展性好：铜合金的延展率为<span>20~40%,</span>电工用铜的延展率在<span>30%</span>以上，而铝合金仅为<span>18%</span>。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(3)</span>强度高：常温下的允许应力，铜比铝分别高出<span>7~28%</span>。特别是高温下的应力，两者相差更是甚远。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(4)</span>抗疲劳：铝材反复折弯易断裂，铜则不易。弹性指标方面，铜也比铝高约<span>1.7~1.8</span>倍。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(5)</span>稳定性好，耐腐蚀：铜线抗氧化，耐腐蚀，而铝线容易受氧化和腐蚀。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(6)</span>载流量大：由于电阻率低，同截面的铜线电缆要比铝线电缆允许的载流量<span>(</span>能够通过的最大电流<span>)</span>高<span>30%-50%</span>左右，特别是家用电器越来越多，家装基本用铜线。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(7)</span>电压损失低：由于铜线电缆的电阻率低，在同截面流过相同电流的情况下。铜线电缆的电压降小。因此，同样的输电距离，能保证较高的电压质量<span>;</span>或者说，在允许的电压降条件下，铜线电缆输电能达到较远的距离，即供电覆盖面积大，有利于网络的规划，减少供电点的设置数量。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(8)</span>发热量低：在同样的电流下，同截面的铜线电缆的发热量比铝线电缆小得多，使得运行更安全。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(9)</span>电损耗低：由于铜的电阻率低，相比铝电缆而言，铜电缆的电能损耗低，这是显而易见的。这有利于提高发电利用率和保护环境。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(10)</span>抗氧化，耐腐蚀：铜线电缆的连接头性能稳定，不会由于氧化而发生事故。铝线电缆的接头不稳定时常会由于氧化使接触电阻增大，发热而发生事故。因此，事故率比铜线电缆大得多。特别是在一些铜线和铝线对接的地方，稍微没有接好时间一长就出问题。所以铜线和铝线对接一定要严格要求接好。</span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>(11)</span>施工方便：<span></span></span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>①</span>铜线柔性好，允许的弯度半径小，所以拐弯方便，穿管容易<span>;</span></span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>②</span>铜线抗疲劳、反复折弯不易断裂，所以接线方便<span>;</span></span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-size:small;"><span style="font-family:宋体;"><span>③</span>于铜线的机械强度高，能承受较大的机械拉力，给施工敷设带来很大便利，也为机械化施工创造了条件。<span></span></span></span> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <span style="font-family:宋体;font-size:small;"></span> 
	</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <b><u><span style="font-size:small;"><span style="font-family:宋体;"><br />
</span></span></u></b> 
</p>
<p style="font-family:" font-size:14px;background-color:#ffffff;"=""> <b><u><span style="font-size:small;"><span style="font-family:宋体;">铜线缺点：</span></span></u></b> 
	</p>
<span style="font-size:small;"><span style="font-family:宋体;">铜线价格高、铜线比重大，两者决定了铜线成本高。作为电缆用性能优点多多，就是成本高！所以我们常见的架空线基本不用铜线，它好是好就是太重了，所以架空线往往铝线用得多，地线通常就用铜线了。</span></span></p>
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