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请教各位:19.8中“如果温升大约为1K(1℃)/min,则该实验就完成了。”请问,其中的温升指的是谁的温升?其中的试验指的是什么试验?3 q& K+ ?: J' v: q( L m
/ ~. z" A; X8 k/ ?) h' P19.8 All appliances provided with supplementary heaters are subjected to the following test
; Q/ b+ @3 Y' J9 Eunder the conditions specified in Clause 11:
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! }6 q" T5 t4 V! ~7 l3 }( dAfter the airflow conditions specified are established, the indoor airflow is restricted to such4 M! [# N! h; s
an extent that the temperature of the air in the outlet, measured by means of the
w4 w* i1 h' C/ W! |, q2 vthermocouple grid (see 11.3), is 3 K below the temperature obtained after a temperature
: V% o) Q# p$ ~: v& Zlimiting control, a motor protective device, a pressure switch or similar device operates for
1 Y$ a6 s# ?6 Q" {: ~/ N" t; w: Tthe first time as a result of slowly restricting the free area of the inlet.
$ D& Z' O" R4 a- z1 L3 X2 H% E/ b: Y4 K
This is achieved if the temperature rise is approximately 1 K per min.
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: P4 U+ o0 G5 z% ^7 VIt is necessary to restrict the free area of the inlet until the first of the protective devices5 b+ D k w) K: {+ L
operates and then operation is resumed with sufficient restriction so that the temperature of
" W# [; W6 i t" N4 x9 @the discharge air is 3 K below the temperature at the moment of cut-off.: B V& ` w. U7 ]6 j
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Appliances are operated at rated voltage or at the upper limit of the rated voltage range.0 E/ h1 D: |3 ]+ W+ j
NOTE 101 To facilitate this test, the protective device which has operated may be short-circuited once the temperature at which it operates has been determined. |
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