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fasten 发表于 2019-1-19 09:399 Z" H O% E* B8 S6 ~0 g6 q3 b
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ...
49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 81 M( C9 w% b$ _! D, Y
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial
3 X/ X5 Z+ p$ m$ r& xcenter of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles1 p9 h3 P ]8 ^/ U
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
6 ^- p4 O, x" R4 F3 \- iresulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
6 z( z( ^2 t$ j% U' fthe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
* @1 a6 @) E& Greceived″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The6 ?2 H) V! `7 M$ ^' }0 B
conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
8 G6 G0 p$ h" M; c, A3 K1 eflexing.( G& V- D+ Q$ s8 j
Exception No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,/ d$ w+ \" B6 o J f# }
adjusted such that the cord is held taut and the intended flexing action is produced.
# F5 F) J& `# D/ p6 k! h* bException No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater, X$ A9 j$ e' }$ T) d' _9 \1 Q
than specified' c& x) Q( }: X0 h
, T! N8 ?' [$ A* `: C) o( O
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 2018-8-2 09:37
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发表于 2019-1-19 09:39
