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fasten 发表于 2019-1-19 09:39! @3 p3 G1 {" f7 G4 E/ A
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ...
+ W9 ~" ]2 b2 E' k% H3 M49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 85 Y- P$ g- D. F
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial2 X4 f6 }# w0 C
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles' m' s) a$ Q4 b- a9 h- P
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
5 M( x$ _: R0 f8 r2 Wresulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
8 M* B" Z4 ]% p3 U* `7 R7 F# z3 Hthe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
~# }( G# g: X6 c! h5 O) creceived″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The/ F' A5 A' Y# O& P/ B
conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of# z( L# o% G: o
flexing.
- `# f, U V" o& i) FException No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound," q- B3 v1 c/ u# g+ ?: R
adjusted such that the cord is held taut and the intended flexing action is produced.
; s, t: u4 o6 `6 @9 B% y/ m) xException No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater( g% A0 q) D; P* e
than specified8 X X" {7 ^5 ^' O
1 m$ A) {5 E6 a6 d
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
