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fasten 发表于 2019-1-19 09:39, X! Y& B, ~: _5 O" w3 K8 ]) @
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ...
8 V9 G5 m X6 F( c6 S R49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8
; ~: p' L& }# y& v1 Yinches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial
1 F1 }$ P7 B5 b% h9 T" J/ \4 P% [center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles/ k/ L3 ]- F$ v/ M
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,$ b0 \2 F/ E' @( ?/ \8 V$ ^4 V
resulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
' y9 E% m/ v7 _2 othe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as3 F9 w" V4 @( C- [. }
received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
) _( E) N8 Z# i- c! U, d0 zconditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of$ x$ g$ A+ B6 V7 J! [
flexing.
& f2 F+ H }/ {+ X P# d, u) l+ ? NException No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,$ x/ k- B5 s, K# a6 B8 Z3 W
adjusted such that the cord is held taut and the intended flexing action is produced.
# W: \6 ]; |) P7 O' d+ p7 q2 dException No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater! C( `% ^3 y9 b! L, C0 d8 i+ j3 {
than specified
" p* z8 N; o0 G& L0 q8 ~2 L7 ~/ v8 G2 o" Z
这里只是描述测试方法，没说转尾在线上吧？ |
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发表于 2019-1-19 09:39
