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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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. F3 w3 p$ e7 X. w" \$ z" N; ]19.8 All appliances provided with supplementary heaters are subjected to the following test
7 U3 V1 V5 @: yunder the conditions specified in Clause 11:8 _: u. a( H9 Y! C0 W
/ J( Z' \" m0 s8 D; MAfter the airflow conditions specified are established, the indoor airflow is restricted to such& B5 W4 U/ I9 a. o( s
an extent that the temperature of the air in the outlet, measured by means of the
# ?- k/ [4 k4 |! ?4 ^5 b( kthermocouple grid (see 11.3), is 3 K below the temperature obtained after a temperature% o; x0 ?* Q0 O9 [
limiting control, a motor protective device, a pressure switch or similar device operates for
y) P2 {* d$ m% J6 ]" w2 g5 ]2 ethe first time as a result of slowly restricting the free area of the inlet.
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8 E, G, B$ a9 x# l7 l! uThis is achieved if the temperature rise is approximately 1 K per min.1 v' z0 t% r1 Y0 `) ^) b
# m a, I Y2 B# S) }; J m8 [It is necessary to restrict the free area of the inlet until the first of the protective devices
, }( e8 W& _& Q9 B$ W+ Moperates and then operation is resumed with sufficient restriction so that the temperature of
/ q' T) l6 ^( v7 d2 W) Qthe discharge air is 3 K below the temperature at the moment of cut-off.# |0 q7 q6 s$ s# {. Z
4 \ J3 {* R, Z9 V- }+ DAppliances are operated at rated voltage or at the upper limit of the rated voltage range." u" t3 Y5 t. K/ R
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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