zihwoei 发表于 2013-11-4 11:28 static/image/common/back.gif
如果你是跟UL做案子的话, UL对于传统UL标准中的Strain Relief Test这项测试的位移要求是"零", 零位移的情况 ...
UL507等标准里，strain relief test 可以允许电源线发生2毫米位移啊
极品老工 发表于 2013-8-13 16:05 static/image/common/back.gif
只有谁先谁后绷紧的要求，对长度没有要求。长了不一定合格，短了也不一定不合格。
UL标准对不同器具，其电源线长度有要求的。
jjlamshushushu 发表于 2013-11-4 11:46 static/image/common/back.gif
UL507等标准里，strain relief test 可以允许电源线发生2毫米位移啊
以UL 507来说, 条文42.1 The strain relief means provided on a flexible cord shall withstand for 1 minute without displacement a direct pull of 155.68 N (35 pounds) applied to the cord with the connections within the appliance disconnected. The strain relief is not acceptable when, at the point of disconnection of the conductors, there is such movement of the cord as to indicate that stress on the connections have resulted.条文里头的说明应该满明确的, 就是零位移.
如果你是跟"UL"做案子, UL在拉力的判定上就是要求零位移(without displacement), 除非像是UL 60335这种IEC Base的标准才与IEC的做法一致.而其他发证单位可能接受电源线位移但那是基于该单位的技术/商业考虑, 而非基于标准的要求.
zihwoei 发表于 2013-11-4 12:22 static/image/common/back.gif
以UL 507来说, 条文42.1 The strain relief means provided on a flexible cord shall withstand for 1 m ...
哦，这是2012版本?给你加分！
