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fasten 发表于 2019-1-19 09:39, G8 J" [6 U) d$ B& S! V a
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ...
6 M N/ e X0 j49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8
$ q' `& \: L9 V) rinches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial, v# T7 ^! a, c! M2 Y! ~! x M
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles
, k! g7 d$ A# i( }5 A5 Oper minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,- `4 r% }* z" s) o: {9 o
resulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
1 R+ K" q/ q$ T" {& P& ithe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as4 H G* ^9 k# o a8 i W! Y( b
received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
8 W, y: k2 W" \& r) ]9 K, Sconditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
$ K( M" M# d3 v+ s! e- C! b+ {* iflexing.5 y1 }: S4 s) N4 X q
Exception No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,5 e% @* `5 ?! z1 q1 C6 j: }) S
adjusted such that the cord is held taut and the intended flexing action is produced.6 T2 f; k* f& r
Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater' Y. W. O: ~) T7 H: O( M
than specified
7 q, {8 r3 {6 x8 y' w4 c5 f" d- I' R
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
