|
fasten 发表于 2019-1-19 09:39+ A# a& t \( v: F
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ... ; i: N t* \9 N- [: w
49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8
! ~5 ^' r! H Z) Binches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial
& l) A, V$ H( H+ W7 g6 ~center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles
( p2 U' T5 W0 Uper minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
6 h8 F2 C. {. Y# j: yresulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
& b2 B2 @+ G7 _% V7 b; Rthe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
5 `3 V A9 Q. Areceived″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The' }& y5 o: ^1 M; o
conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
* r# T: Y" a8 P/ M3 [flexing.# ~8 n J. i7 R1 y$ k
Exception No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,2 B- L9 ~# V) i# [
adjusted such that the cord is held taut and the intended flexing action is produced., i7 i' M0 R+ g
Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater
1 k/ a0 w4 I3 r# X1 \6 y) W2 l2 Bthan specified
7 C$ }8 p7 H# y2 B4 H+ r% H8 ]$ k7 M# b
这里只是描述测试方法,没说转尾在线上吧? |
|