|
fasten 发表于 2019-1-19 09:39/ k2 V. `. d8 D% o
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ... ! {% C. `5 F# [5 r1 ?( N3 Q
49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8
2 c# V$ s- u& O% H4 o* a( ginches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial
2 L% c! Z. P. J5 ?: Pcenter of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles
, f: n J+ L6 Q: Gper minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
/ K% H* Y/ N; J8 s1 X8 rresulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of' X8 C7 x! D: D1 r- C* f) w
the sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as/ e* S& U# J: f; [
received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The3 h( L2 D7 h) o8 Z) z4 l% C" Q
conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of4 k- K E4 \3 p: f4 ^2 s" |' t N
flexing./ S- z3 S, V$ j. Q0 N
Exception No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,+ z) w- M @9 d. U
adjusted such that the cord is held taut and the intended flexing action is produced.
% P. O$ ?1 W' v" hException No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater
0 J+ O2 h5 T2 r: {. [5 q& r ~than specified
5 Y1 x" N) D7 A, R9 t: X9 V. \
这里只是描述测试方法,没说转尾在线上吧? |
|