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如何对电吹风分离电路做39.3.3和39.3.4？UL859
' K# N. Q- `) v+ Q% ?" g+ ]/ XThe air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted: @( U. G4 j& s5 O
by the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained+ p4 X. _, [+ A2 H
39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,
1 z; o9 D& G; R* m0 Q90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four7 t" Y: c* K5 G* u
positions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom): O& r' P$ y' Y7 N' b n7 M8 {- |
is to progress in the same direction in which it was started and is to be such that the limit control will
# f2 X* B9 b6 O( U( x% u, ^8 Lremain in the air flow for the longest possible time as blocking progresses. If temperatures cause1 A3 F! `: r$ k7 \
degradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate
) Z9 K" p* u9 S! h9 J; Bor other material resistant to combustion may be used to block the outlet opening. If the final 100 percent/ T& \0 n) r2 X. I# r8 L; E# M
blockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to, t1 Z9 W1 b4 Q. G- P/ g" f% K
be continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to! }: A3 p6 \7 G* G
be achieved.
8 s4 S8 ^4 P# f9 _7 N( T+ @, e/ d, U* B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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