芯线绞距以及铜线绞距是什么意思啊? - 简版
也就是一根芯线或单线,旋转一周后,测量其两点直线距离,
说的不是很好,请找些绞线书籍看一下绞线的理论知识,或直接请教工人
ZHANGTAOC:
也就是一根芯线或单线,旋转一周后,测量其两点直线距离,
芯线是线芯吗？线芯绞距和外围绞距科是不一样的
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Aspecimen of approximately four to six feet in length shall be cut from thesample coil or reel. The specimen shall be tightly secured, at both ends, tothe work surface before the window is cut, to ensure that the conductors cannot untwist. A “window”, exposing the conductor assembly, shall be cut in thejacket, while leaving at least 12 inches (300 mm) of the jacket intact at bothends. The window shall be approximately 1/4 of the circumference in width andapproximately one inch (25 mm) longer than twice the maximum required laylength for the sample. e.g. for a 3-conductor, 18 AWG cord (which has a max.lay of 2-1/4 inches or 57 mm), the window is:
2 (2-1/4) + 1 = approx. 5-1/2 inches long, or
2 (57) + 25 = approx. 139 mm
简单地说就是在外被上开一个4分之1个圆的窗口，窗口长度大概是这种线号的电线最大允许绞距的两倍加上25mm，然后量出2个绞距，除以2，得出实际绞距。
铜线绞距概念与芯线绞距类似，不同的是指的是芯线内的铜丝的绞距，测量方法也不是窗口法，一般是测一根铜丝的10个绞距再平均。
绞距是芯线或铜线旋转一圈后的直线距离,
或旋转十圈后的直线长度除以十,为绞距,通常采用此中方法测量.
学习了
铜丝是绞合导体中其中一条铜丝同一方向环绕导体一周的距离。UL通常是测量10倍绞距。除以10. 测试方法就是在导体上剥离一条单丝，用手松开单丝，退绕导体10圈，上面有一绞路很清楚的，测量10个距离就行。
芯线其实也一样，但芯线更好测量，芯线有颜色，你找一个单色，同一方向环绕一圈后这条线出现的距离就是！！可以取平均数。比铜芯更好测量。
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