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如何对电吹风分离电路做39.3.3和39.3.4？UL859
8 n! e$ W- G7 E! s* v0 P% NThe air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted( _& B* V" `6 k" M+ t) e
by the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained9 J8 V1 S) `; z% A1 L
39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,, _' P& N* m6 R0 i" w; _
90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four
5 h% r0 o' w% `7 h& T( S% M: ^4 Fpositions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)
) ?8 p! h+ J/ T8 [& k7 g# Gis to progress in the same direction in which it was started and is to be such that the limit control will6 ?" ^) K6 U/ \1 l
remain in the air flow for the longest possible time as blocking progresses. If temperatures cause
* n0 `5 Y l6 V: V8 w; `, Cdegradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate
+ a J5 @/ ~+ r, h# B( |or other material resistant to combustion may be used to block the outlet opening. If the final 100 percent$ W4 ~" q/ o! F+ y9 {' m
blockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to
! X" A! p3 ~. ~1 \# @3 ~% }1 o7 ebe continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to. J; r, G7 n2 Z1 v& Z T
be achieved.
, T: ~- F. f2 q6 O7 \) ^; a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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