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fasten 发表于 2019-1-19 09:399 A0 G& }! O) V7 v5 L1 T
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ... $ r( D! W; q/ z1 P5 v
49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 89 t% L2 }8 m! @' e
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial u9 N% X, `6 P8 D: Q
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles
- ?5 R ^4 X4 o3 Hper minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,- F+ `% k. Z* H* X6 B
resulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of) A( J4 M9 C+ K+ g2 N# |! b. ?
the sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as% k# A( M0 G$ Z
received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The2 f. ], u# u9 D3 N; ]
conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
& C& q% g* p! p0 ]0 iflexing.
; `/ d/ B; d( V eException No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,
: E- Q4 O/ r# e; }2 G9 O3 Madjusted such that the cord is held taut and the intended flexing action is produced.+ z7 v, C' d5 s5 _( C+ W9 \
Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater
6 i5 u9 R# W) N1 Z7 }than specified; t& o, e3 u% ~4 R$ m* v
0 n( C0 h9 s) b. c% K' a
这里只是描述测试方法,没说转尾在线上吧? |
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