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jjlamshushushu 发表于 2014-5-30 18:05 $ v( p3 ]7 ^# l; @5 ]
UL医疗插头,张力缓冲测试?测试规范呢?
! Q; l9 _4 O! x0 x- z: s0 E0 s109 Strain Relief Tests
& W- ]/ [; u, i5 `+ U109.1 General, E! U5 N6 N' K! b/ H2 o) @
109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any
/ t( m; P6 Y1 p$ b2 hdisplacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/329 U+ I: o5 Z3 O3 n
inch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the
* n. O& s3 k6 ~7 v0 X7 U/ mattachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path+ |. M2 z" S; ]* ]3 n+ p0 N( o4 e- K
integrity.# b* t. ?% A( |; G; g o
109.2 Method A – Static pull
) A; o+ C5 \) U" w9 k% C' B* ^109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors" H0 `$ b& X0 w8 Q- O: U+ d
terminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)9 Y$ h) I3 C. G
to the free end of the cord while the attachment plug is securely supported. The force shall be applied for% d* X# K# B1 A
1 minute in a direction perpendicular to the plane of cord entry.
( }; u0 ^; O e+ u% B$ F {109.3 Method B – Rotary pull
9 h* G5 g4 w$ g) r U109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors. L, B0 |# z/ B4 b
terminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10
7 ^% ] [( J3 ^& M6 Q! P+ ~4 Glbf (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
" S6 n+ Y) }& |! d$ S8 c9 u0 P4 m3 m" Tdiameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly' o; p! w: n7 Y" C1 _( \; H
mounted. (Note – This test is conveniently done with UL secureness test apparatus described in the& g8 R' L* q' Y' q% }" r/ ]
Standard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the0 k/ R* l" x1 q( v
Standard for Wire Connectors for Use With Aluminum Conductors, UL 486B.) |
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