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如何对电吹风分离电路做39.3.3和39.3.4？UL859
% c3 r+ Z- n7 {+ lThe air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted6 {3 E6 p( D5 t/ O1 v5 b
by the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained' }; o# t6 ~ L# E/ g- v
39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,/ ~7 w% ` b p5 v$ S1 q* G1 L: A+ ]
90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four& C5 }4 i& r6 e8 N- Y9 s
positions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)9 `+ z0 W; g0 Z. Z. r$ P
is to progress in the same direction in which it was started and is to be such that the limit control will
7 G1 z! P" M) P" [remain in the air flow for the longest possible time as blocking progresses. If temperatures cause$ R5 _ c. z" N; S% o' o
degradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate
- ?# x% | L3 S4 n6 h2 d* N' [or other material resistant to combustion may be used to block the outlet opening. If the final 100 percent
5 E# U, B+ q6 t I4 R# X/ k+ u, h( ablockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to
4 \4 p9 ^) k/ s$ U2 n- N$ J9 _* s$ A1 dbe continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to0 \; G( I1 b) n0 Y v
be achieved. [ f1 x9 P) L
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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