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jjlamshushushu 发表于 2014-5-30 18:05
1 H4 h8 @1 x5 F/ j# I- uUL医疗插头,张力缓冲测试?测试规范呢? . ?6 Q7 a5 d2 k- |+ J
109 Strain Relief Tests6 _) z7 B( u( Y* P) Y2 }% X, C
109.1 General! a+ M& K ]$ W
109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any. ] b' v$ J3 s6 E
displacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/32
3 a5 a2 C6 S n+ ^/ _9 zinch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the
' v$ J+ a$ e9 F- f6 Mattachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path
3 [; d4 e$ S' u; vintegrity.0 p- f5 Q0 l/ R0 I$ y
109.2 Method A – Static pull0 L& h, U$ p% C) b% F+ c
109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors0 E$ @: ?2 b+ F1 j7 L; q! E! R
terminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)7 f/ s0 L% S. ~! [, e P
to the free end of the cord while the attachment plug is securely supported. The force shall be applied for
D: `. @$ n- O5 o. L1 minute in a direction perpendicular to the plane of cord entry.
# Q( R, z5 ^0 K+ C! b1 Q109.3 Method B – Rotary pull
7 a/ q% V# h! ~109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors
4 O% M B: B1 U' m7 G& R; [/ E& C; Wterminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 10
5 N4 x/ X. X8 D0 Elbf (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
% C% }4 a- g, |$ p1 Q( N Ddiameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly/ N% u4 E% M9 A) |
mounted. (Note – This test is conveniently done with UL secureness test apparatus described in the
1 d' g$ n& G% B& o( s6 _' @, G" fStandard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the+ L8 Z( ^& B/ L4 c( @/ C2 _, {2 z$ I
Standard for Wire Connectors for Use With Aluminum Conductors, UL 486B.) |
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