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jjlamshushushu 发表于 2014-5-30 18:05 
, O, R/ a. a7 t8 Z yUL医疗插头，张力缓冲测试?测试规范呢？
. ?7 M# F/ a8 p$ e# [109 Strain Relief Tests* L6 A6 H1 D2 C
109.1 General8 h% X% \0 s* B( V+ V8 ~# _
109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any
( r4 V9 U( f9 ^1 G7 J% {5 \. [displacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/32
7 P) J2 i+ d. Y# k- _' R9 O- u' f, oinch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the: u% l9 r: Y$ a% `! V2 C
attachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path% K! w% f i: L* H4 @( B3 W: A
integrity.
8 m: D$ `$ [0 d% u109.2 Method A – Static pull E2 Z4 ]2 M5 t- i, p
109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors
, x2 @* D% W2 Kterminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)+ U2 w- ?( x+ y/ ^. k5 x) X
to the free end of the cord while the attachment plug is securely supported. The force shall be applied for
3 _" E7 u. y) }6 e) e: I! E& Z5 E1 minute in a direction perpendicular to the plane of cord entry.
) x: O0 l+ \! v109.3 Method B – Rotary pull
& H2 o# j- B& `109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors* s$ g' F+ z% x: W. {
terminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10( @8 @6 t$ l N1 x g/ p+ B( V
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 inch5 v3 S& z/ q; M- Q
diameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly9 ~. f) W7 n( S* F p
mounted. (Note – This test is conveniently done with UL secureness test apparatus described in the
# Q A* z3 Y5 {5 aStandard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the
$ {/ I5 }7 f/ X2 hStandard 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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