关于UL1082标准7.11疑问

myhet · 发表于 2008-5-18 11:02

7.10 An opening in the enclosure that has a minor dimension of less than 1 inch (25.4 mm) is acceptable
if a probe as illustrated in Figure 7.2, inserted through the opening, cannot be made to touch any
uninsulated live part of film–coated wire that involves the risk of electric shock. The probe shall be applied
in all possible articulated positions before, during, and after insertion.
7.11 An opening that has a minor dimension of 1 inch (25.4 mm) or more, in an enclosure, as illustrated
in Figure 7.3, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire
less than;
a) R distance from the inside edge of the perimeter of the opening and
b) X distance from the plane of the opening.
T equals the enclosure thickness, R equals X minus T, and X equals 5 times the diameter of the largest
round rod that can be inserted through the opening but not less than 6-1/16 inches (154 mm). In
evaluating an opening, any barrier located within the volume is to be ignored unless it intersects the
boundaries of the volume in a continuous, closed line.

7.11是否说在一个符合7.3描述的外壳上，当有大于或等于25.4mm的开口时，如果在外壳的以下范围内没有uninsulated live part or film-coated wire的是可以接受的？
这个范围是：A，从开口内边角算起的R距离间。R=外壳厚度+X
B，从开口平面算起的X距离间。X=MAX.（5*Rod直径，154mm）

simondai · 发表于 2008-5-19 22:09

个人理解:
7.11 当产品的外壳上有如图7.3那样的一个开口,并且此开口的最小边长度大于等于1英寸时,如果能够满足：

Ａ）在以开口内边为中心，距离为Ｒ的周长范围内，同时
Ｂ）距开口外表面Ｘ距离的范围内

没有任何未绝缘带电体或者漆包线，则认为是可接受的．

Ｔ为外壳厚度，Ｒ等于Ｘ－Ｔ，并且Ｘ应当等于最大可伸入开口圆棒直径的５倍但不应小于６－１／１６英寸．在评估开口时，任何挡板都应当被忽略除非该挡板在外壳上的投影可以和开口２边外壳形成一个连续封闭的线．

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