|
|
如何对电吹风分离电路做39.3.3和39.3.4？UL859
, ^# b- y6 I I5 CThe air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted4 N" ~9 f' l& U8 G/ c: m! J
by the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained
3 `, l" g! v0 f" `2 ^, {3 I; J39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,# x; J6 X9 R* I% ]
90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four; w! w h* b# s# V* x7 U
positions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)
, {/ E3 a2 W. u1 ^# i5 p1 his to progress in the same direction in which it was started and is to be such that the limit control will
) `0 x9 O% ^7 J& x& j' s8 c# ?remain in the air flow for the longest possible time as blocking progresses. If temperatures cause
% H+ Y Q* y, A2 t8 b# \degradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate
9 p1 S% u; R9 Y5 M* M B" for other material resistant to combustion may be used to block the outlet opening. If the final 100 percent
) K {; U2 }/ }" lblockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to
- ~9 S9 ?& y5 z6 }* U& Gbe continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to
, ~3 P- n/ X% `. hbe achieved.
+ Z. S5 V1 y2 L3 J是不是TCO动作了不停止了，还是做到最终结果或者是FUSE开路? |
|
/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2009-5-30 17:21
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
楼主