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如何对电吹风分离电路做39.3.3和39.3.4?UL859
$ A2 B ~0 a2 e- e z0 }! {The air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted
3 M0 C6 ?1 h6 j Zby the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained
' v/ }, F: T9 L. u, U: u. P39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,( s) @" I6 B8 @1 D- _7 _$ e
90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four
6 c, K6 }) F4 F$ L r { qpositions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)2 \; m' Y# ]0 {: W+ ]' F8 T- B2 s4 h1 l
is to progress in the same direction in which it was started and is to be such that the limit control will2 O+ h. J( w5 ~1 O% u
remain in the air flow for the longest possible time as blocking progresses. If temperatures cause
( i; }3 |8 K- p4 J8 m/ O& jdegradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate- Q" }1 a3 U1 C
or other material resistant to combustion may be used to block the outlet opening. If the final 100 percent' ~9 P! g @ o
blockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to/ C% J9 e8 O S& }/ w
be continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to
f0 l- t! s s2 D3 pbe achieved.
8 P/ D: b9 a( {" o: d( @2 w# _9 ?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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