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fasten 发表于 2019-1-19 09:39
" g/ \1 K% E, P* }0 a42.3 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 j3 d% |2 v- e, q
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial* n- b6 ] o: a" y9 L) e
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles8 p; m( p& ^0 H. v
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
: n" R4 m! w) S) M3 M z& aresulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of5 I4 t- H+ \4 }6 d' v2 f* d
the sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as, Z% n; N& X( w0 m4 T/ e
received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
7 p2 G+ Z, k y3 U2 W+ q4 ^+ K: bconditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
- s* O: Z, ^4 m+ {+ ?1 s7 s7 yflexing.
; d9 {6 o! R3 B; T& fException No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,
! }' j% e4 X6 H4 l& Q' ]adjusted such that the cord is held taut and the intended flexing action is produced.
2 X! ^# n- B4 m' xException No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater! b- F, X; k$ D" }* E
than specified
8 h+ U3 Z) B4 l' ?) ]& s; h- \4 ?. @9 w" r0 I8 E/ i
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
