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如何对电吹风分离电路做39.3.3和39.3.4?UL8590 ]' F) m7 _7 K% ^5 V
The air inlet opening shall be gradually obstructed until the operation of all circuits is interrupted
0 K( U& h% {( r% Zby the functioning of a limit or a temperature control, or until ultimate results are otherwise obtained2 G! n; O# y0 }( a
39.3.4.2 The air outlet is to be gradually obstructed using masking tape such that approximately 50, 75,4 ?# ]3 O! X6 H
90, and 100 percent of the outlet opening area is progressively blocked for 3 minutes at each of the four
3 T) H8 O L" a! P9 Q3 W( ?* n9 wpositions. For each of three samples, the location at which the blocking begins (the top, a side, or bottom)
+ z4 I7 f- I4 i- M$ Dis to progress in the same direction in which it was started and is to be such that the limit control will
5 t& H3 t8 G5 Uremain in the air flow for the longest possible time as blocking progresses. If temperatures cause
/ K9 U, p, \0 m$ s! @% x# ^3 C7 Rdegradation of the tape, or if the use of tape would cause deformation of an outlet nozzle, a metal plate: K+ p l' r0 V4 Q9 m
or other material resistant to combustion may be used to block the outlet opening. If the final 100 percent6 L/ Q+ d# O8 O$ @3 W
blockage test does not result in interruption of all heater and motor circuits by a limit control, the test is to
( \* x, K( `/ @ W2 P; Jbe continued, at 100 percent blockage, for 7-1/2 hours, at which time ultimate results are considered to
7 Q! v# X/ W+ }5 @: abe achieved.
( @8 n: }" C( b; 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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