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fasten 发表于 2019-1-19 09:39
. ?4 w Z6 P/ p5 _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 8$ a0 u" q% f- P
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial6 L% \* w, q! y' u' }
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles4 @' i& A7 F/ U2 ~+ M5 t% @1 H0 ]
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,7 a5 {2 |; m; C
resulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
& K, r$ f2 t3 t9 C4 m' Vthe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
; g; }2 R$ w3 a J& ]* lreceived″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
4 A# m! l. v/ y0 D6 f6 |conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
5 j- X( B- f. M) cflexing.
0 _1 H( n2 @. B2 _Exception No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,
$ v& ]8 j( J: @: C; e' U% Vadjusted such that the cord is held taut and the intended flexing action is produced.' q6 X, r+ h9 K# `0 s# p
Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater
/ Y3 x4 \4 F# Q1 C8 q r: Ethan specified) X. s5 O" x+ t5 k- _2 E3 O
. h7 P. c1 Q) `4 @$ c9 A9 @4 [' h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