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fasten 发表于 2019-1-19 09:39
, L6 ?' E! s( p6 p42.3 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
* b4 t5 i4 @ p5 _+ a: V! m0 [inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial( }7 \2 O2 A, c+ a( V; A& N! |, }
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles
9 J2 E" _: r3 \$ E9 c9 ]8 Fper minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,+ F+ G/ t5 F2 }1 Y
resulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of& w& i5 T! j/ j
the sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
S& ~$ ~2 w' S% q4 _3 z _received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
1 s2 Y- H) s$ r& A! L5 |$ i ^conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
# c. _ K4 r$ j- Lflexing." T6 A/ I9 @7 A9 [: u, W
Exception No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,
* ^. w; [# @! t( K* A6 O* i+ ^adjusted such that the cord is held taut and the intended flexing action is produced.
; s" v! I) c6 `/ {Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater
3 }& \+ |: N$ f: s9 N3 L9 ~than specified% `7 w( J% u9 C* [8 x9 ^/ ^; x
- I- d8 ?! ?6 n% d. A' z
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
