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在 power supply cord 标准UL817 和 成品标准针对 SR 的要求, 会有所区别的.
$ V& e- g" Y2 K1 i" c) u8 \如 fasten 兄所说, 在UL 标准的 strain relief 章节可以找到答案.
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) V/ t2 S( G& w3 p% w不同的标准, 输入线和输出线, 是有区别的, 所以还是要看具体的标准. 这里列举几个标准要求, 供参考9 T8 D; K* ^! r+ J
4 z( f3 V& ?, y. Q1. UL1310 第41章节
$ Z: p, H/ s# m- s) O$ p- N/ R2 DWith internal connections disconnected, the strain relief means provided for a supply cord, or a multi-conductor output cord where the interconnection of outputs exceeds Class 2 shall withstand the force described in 41.3 applied to the cord for 1 minute without displacement or breakage of the cord or deformation of its anchoring surface.3 u0 A- ?! c/ `/ }9 w& G
请再细看标准: 输入线(35lbf 1分钟), 输出线(20lbf 1分钟), 内部连接短开, 标准说不允许有位移, UL实际控制在1mm.
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$ R$ D& y! @0 d, A, {6 C2. UL697 第37章节 - 输入线 SR 吊重测试* K2 x2 \; i/ s6 y
When tested in accordance with 37.2 and 37.3, the strain relief means provided on the flexible cordshall be capable of withstanding a direct pull of 35 pounds-force (156 N) applied to the cord for a period of 2 minutes without any displacement of the cord or deformation of its anchoring surface that would result in a potential risk of fire, electric shock, or injury to persons.
+ S( o: O4 v( j* y% T请再细看标准: 输入线(35lbf 2分钟), 输出线(20lbf 1分钟), 内部连接断开, 标准说不允许有位移, UL实际控制在1mm.
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! \; k" n% O3 q( w3. UL697 第38章节 - 输出线 SR 吊重测试1 V' b! W7 y0 Y' d7 M
When tested in accordance with 38.2, the strain relief means and the output cord shall be capable
! @) x, l4 _; a) Sof withstanding a direct pull of 20 pounds-force (89 N) applied to the cord for a period of 1 minute without displacement or breakage of the cord or deformation of its anchoring surface.
" m2 h# z r$ @8 {: k: f请再细看标准: 输出线(20lbf 1分钟), 内部连接断开(标准虽然没说, 都这样做), 标准说不允许有位移, UL实际控制在1mm. |
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