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如何对电吹风分离电路做39.3.3和39.3.4？UL859
% I. G7 f( u" I u. y7 l- CThe air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted* Y) T) ]$ ^" p, E% q D
by the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained
6 h- f5 G v1 ?5 i39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,* t9 ~7 o. y" U- F" p5 X7 T
90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four' C! U% I0 Y- ]: D$ V8 J
positions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)
7 \5 _2 Q5 V' d5 m( gis to progress in the same direction in which it was started and is to be such that the limit control will
% z, c1 C/ E& F1 j+ b$ J( Rremain in the air flow for the longest possible time as blocking progresses. If temperatures cause" Z" J6 S# r' R# x. a
degradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate3 ~, n8 i- g( i0 F* a
or other material resistant to combustion may be used to block the outlet opening. If the final 100 percent, [/ M1 d0 t& `6 ^. N
blockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to' h) u' t% h- @& Y, f, d. }
be continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to2 V( z; e7 y7 R
be achieved.6 [! }1 h# u7 e$ l# f5 O
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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