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如何对电吹风分离电路做39.3.3和39.3.4？UL859
; _4 F0 N: p1 rThe air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted
% j! X7 V0 @) s$ t3 b! `1 V( lby the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained
" w$ f( N7 z% F" ^, c2 d& r39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,
. o5 c# f' q; b90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four9 H- O5 I' B" x
positions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)+ Z' i& Q& F$ d1 J0 n" Y
is to progress in the same direction in which it was started and is to be such that the limit control will
# p! {3 y6 f% @remain in the air flow for the longest possible time as blocking progresses. If temperatures cause
/ p$ e( L9 [7 a8 Q; }6 Tdegradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate+ ?6 N) ]4 W, u! X4 K
or other material resistant to combustion may be used to block the outlet opening. If the final 100 percent
* _5 q ^* A6 w" [blockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to
- ^" y& j, z/ wbe continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to
9 d$ I& y' n$ Y( b Pbe achieved.
% z7 [- s( ? f- p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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