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如何对电吹风分离电路做39.3.3和39.3.4？UL859$ S. T! a" P! ^) D* Z
The air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted
0 u/ E) O2 N3 M, hby the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained* x& l4 {6 A. B0 m
39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,! a# M% {3 Z- ]) ^
90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four
5 h+ B7 C& _& {/ o8 |. cpositions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)
$ v8 a1 R7 v/ p" M0 s8 z5 kis to progress in the same direction in which it was started and is to be such that the limit control will) x5 J6 q! V! |2 W. @
remain in the air flow for the longest possible time as blocking progresses. If temperatures cause, C2 z6 p8 j- }
degradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate" w- Y/ _0 T# H; l- N' O" U3 b
or other material resistant to combustion may be used to block the outlet opening. If the final 100 percent
, s: w* {: J7 ^6 qblockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to* {" U, {4 F2 g9 m; r3 i
be continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to
1 m t5 Z' r' `# a3 m* B9 lbe achieved.! w) \* P5 R R H7 h- T6 p ]( H1 y
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? |
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发表于 2009-5-30 17:21
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