|
jjlamshushushu 发表于 2014-5-30 18:05
: A# N/ N8 @+ T' T1 m3 _9 o, cUL医疗插头,张力缓冲测试?测试规范呢?
1 q- ?) y/ {9 W% O, M/ m109 Strain Relief Tests) m$ d! b4 x: H2 i1 S
109.1 General
- J+ a5 Z7 n9 W, p+ w$ ?7 ^# ^109.1.1 After being subjected to the strain relief tests described in this section, there shall not be any- p3 Y9 q* Q6 S$ C2 n
displacement of the conductors, conductor insulation, or outer jacket of the flexible cord exceeding 1/325 G0 C0 \3 f2 h( J4 r9 x
inch (0.8 mm). There shall not be any cuts, rips, or tears in the cord insulation nor any breakage of the
?/ ^# {4 G* ? }* _* fattachment plug that could adversely affect the enclosure of live parts, strain relief, or grounding path1 p# o; s1 N8 g- B" M, d8 p
integrity.
* Y$ }- f9 Y: M3 q109.2 Method A – Static pull0 K2 y. q! \9 L" x% `7 v3 l7 Q
109.2.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors& a { `/ j P% X9 K
terminated to the blades or grounding pin, shall be subjected to a gradually applied pull of 30 lbf (133 N)3 u# b6 S; e% X. h
to the free end of the cord while the attachment plug is securely supported. The force shall be applied for7 x( D8 \/ Q+ M7 z. O
1 minute in a direction perpendicular to the plane of cord entry.
! ], c& W8 D" G4 E2 d109.3 Method B – Rotary pull
6 N! L$ Y) F. B109.3.1 Each of six representative attachment plugs molded onto flexible cord, without the conductors% D6 G" Q- |7 h- |4 r3 [9 P
terminated to the blades or grounding pin, shall be subjected to a rotary cord motion while a force of 100 Q- _7 d( c/ f! T) [5 x$ E
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 inch* @0 q$ Z6 [: M+ `% d6 k6 f
diameter (76 mm) circle at a point 6 inches (152 mm) below the cord exit with the attachment plug rigidly
3 O2 t# S9 P+ @: @4 c/ `mounted. (Note – This test is conveniently done with UL secureness test apparatus described in the, m- p% q* A' ^' n3 J9 M- p
Standard for Wire Connectors and Soldering Lugs for Use With Copper Conductors, UL 486A, or in the
, m) B) l! e4 M7 I' A8 a4 ~Standard for Wire Connectors for Use With Aluminum Conductors, UL 486B.) |
|