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jjlamshushushu 发表于 2014-5-30 18:05 
+ f# D5 k7 y. B& RUL医疗插头，张力缓冲测试?测试规范呢？
109 Strain Relief Tests' k2 Q! h' `$ K$ k- y
109.1 General
7 D" Y3 m3 B% y! {! t109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any7 Q: D. P h- \7 D$ L1 w* G
displacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/32
9 c w7 |3 N' @" [: E8 qinch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the: A3 E! R& U' F# n' q
attachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path
) T8 t! G3 I8 A; }. kintegrity.! J! P7 s. X, r) P: @+ }3 c9 s' U
109.2 Method A – Static pull
0 |& H+ J) N: W+ @109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors7 k0 f% K2 C' y. D1 N" V. Y( b
terminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)9 M8 w4 J1 r. l) ?# N
to the free end of the cord while the attachment plug is securely supported. The force shall be applied for W) E* e, I) }* F" M/ |
1 minute in a direction perpendicular to the plane of cord entry.
9 |! H( F0 |. g( R% [ I109.3 Method B – Rotary pull1 P6 A) n/ W- J3 a/ G
109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors! t; b3 f! Q$ \' Y7 B3 H4 J
terminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10
* {; z1 I5 h2 K; E# Q! Y# y$ Qlbf (44.5 N) is applied for 2 hours. The cord is to be rotated at a rate of approximately 9 r/min in a 3 inch
, X& W' {. f& U' jdiameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly
6 A. ^3 o3 Y3 s" G& zmounted. (Note – This test is conveniently done with UL secureness test apparatus described in the
4 k8 n& z9 G: B/ }. B. }Standard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the- b% g2 R' x/ Q* M5 p# q8 ]& B
Standard for Wire Connectors for Use With Aluminum Conductors, UL 486B.) |
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发表于 2014-5-30 15:53
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