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jjlamshushushu 发表于 2014-5-30 18:05 
7 ~" t9 H5 V6 R9 qUL医疗插头，张力缓冲测试?测试规范呢？
109 Strain Relief Tests# e' s$ L7 J9 M7 j( X' G2 a
109.1 General) N' C3 X @5 E3 B W: M5 @
109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any
9 c; w7 r8 W+ R5 ddisplacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/32+ V! T& n8 J$ S' R! U
inch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the! p! g: y8 t5 C5 H" d) E( }4 }
attachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path/ G9 {4 A0 q$ H) ?2 }
integrity.
$ `1 I5 G( H5 `8 m2 E109.2 Method A – Static pull+ S. C1 ~) y5 W+ F% S2 S/ a. S: a
109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors
, p7 \$ q6 O9 {( n7 Q0 ^4 Pterminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)+ ^! q" K; S! l9 }6 z1 `7 w& R
to the free end of the cord while the attachment plug is securely supported. The force shall be applied for
1 v. X7 E& S# ~/ g9 E; }- [. d1 minute in a direction perpendicular to the plane of cord entry.+ \( I6 F' }0 `8 U0 h
109.3 Method B – Rotary pull9 Y$ ~$ G, a! L- M0 ]
109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors
~. C3 n2 J% h8 a! F$ Bterminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10
1 `! S. \) L: j% Rlbf (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" u# z+ {* E8 ~! I& A% K) f6 k
diameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly2 m8 T- F$ [/ K0 w( @$ T
mounted. (Note – This test is conveniently done with UL secureness test apparatus described in the7 R/ N9 o- |% O2 \- g$ E w
Standard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the2 O5 R7 n, ~& T' N% F/ b& R
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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