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jjlamshushushu 发表于 2014-5-30 18:05  + L3 i: F9 Z1 V, T9 F/ x
UL医疗插头，张力缓冲测试?测试规范呢？
109 Strain Relief Tests: ?3 D' u2 |) D6 G
109.1 General
$ ^! x( j$ s* A! O109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any$ R: V- N0 t H# |6 }% }
displacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/328 D2 `) z4 d; x. G9 Q/ e3 B! g
inch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the4 s; [: C& o% f' o- l4 S) ^
attachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path
2 u! S, B( g3 S+ jintegrity.
, P0 N8 D! F, e7 u. j109.2 Method A – Static pull0 P9 R; p. D$ a- L8 x- n/ c4 Z* O7 U
109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors
% f7 z/ b0 A/ u, l; fterminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)
; d* b: x9 U3 B* k( _$ _to the free end of the cord while the attachment plug is securely supported. The force shall be applied for2 o8 o. X$ G5 n' G/ V) w7 @2 [ E
1 minute in a direction perpendicular to the plane of cord entry.% g0 Q8 f, Y* S& Z
109.3 Method B – Rotary pull
7 V8 n8 v' _) |8 X5 R9 |109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors
1 R3 v) D) F6 y% W& g4 Aterminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10
0 ]! K/ I3 M1 t/ u& l, P* f" ]$ 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/ P6 X3 m5 g7 ?' G5 O( K6 T% ^% k- k
diameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly ^( E1 f/ f3 W2 C; J: g; C( ~3 B; Y
mounted. (Note – This test is conveniently done with UL secureness test apparatus described in the
. q& z y) m% b9 Y' ~Standard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the, l$ M! n8 O9 c( H
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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