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jjlamshushushu 发表于 2014-5-30 18:05 2 _) @# y/ t$ `
UL医疗插头,张力缓冲测试?测试规范呢?
- S: m# H7 p) q8 n) e7 B109 Strain Relief Tests7 [! T, K' j' D& G8 Y
109.1 General
/ P, N, E- |8 R7 ]4 g109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any2 V! |6 T; i: A( }$ ~
displacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/32
, S- o3 ~' K( ?; K/ A9 Binch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the
# e0 P6 T H$ vattachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path& e: k" Q# o: ?- m& \8 w, g
integrity.
`3 g9 Z" w! ~" n109.2 Method A – Static pull
/ h" @* r! L& N) j9 H109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors5 O* Y* C6 x. U( I, z+ C* V: j2 ]% k
terminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)
0 P3 S; r% [* g5 U q# ]to the free end of the cord while the attachment plug is securely supported. The force shall be applied for
3 m" U: W& N; F" K1 minute in a direction perpendicular to the plane of cord entry.
4 G+ P; ~" P" T109.3 Method B – Rotary pull2 ?8 |" |2 x3 K
109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors9 k# j* g+ R+ p# _, [, Q, b
terminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10
5 q' Q' p2 g8 {lbf (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$ q4 y. z* f. g- Y* I
diameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly- B" |9 N; G& y) L; v% i' C
mounted. (Note – This test is conveniently done with UL secureness test apparatus described in the
% ]" s C9 J% F$ {& l# dStandard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the, j' _6 ~. J5 {0 F, V
Standard for Wire Connectors for Use With Aluminum Conductors, UL 486B.) |
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