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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?
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- A# [5 R, B, \8 T19.8 All appliances provided with supplementary heaters are subjected to the following test1 u6 |+ W: {$ }
under the conditions specified in Clause 11:
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8 p& I1 {, D8 W7 n8 z5 XAfter the airflow conditions specified are established, the indoor airflow is restricted to such: E0 k3 I3 v; _3 |, R- ~
an extent that the temperature of the air in the outlet, measured by means of the2 f0 y% J$ Q9 c) z/ t- m
thermocouple grid (see 11.3), is 3 K below the temperature obtained after a temperature
y2 C) m7 w) T3 _. S3 }limiting control, a motor protective device, a pressure switch or similar device operates for
' }+ g8 s1 _; U/ C4 F, gthe first time as a result of slowly restricting the free area of the inlet.
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This is achieved if the temperature rise is approximately 1 K per min.
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It is necessary to restrict the free area of the inlet until the first of the protective devices
/ o7 B* x0 X# M3 {7 u7 w& c; ?operates and then operation is resumed with sufficient restriction so that the temperature of# ^( |; ^0 |4 G$ f! _- }! E
the discharge air is 3 K below the temperature at the moment of cut-off.
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. i; U, B/ g5 }" N1 S; S0 qAppliances are operated at rated voltage or at the upper limit of the rated voltage range.
' s; Y+ v$ O) N5 M( _) g3 J9 CNOTE 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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