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引用第27楼0321于2008-04-03 15:43发表的 :( a( ?$ X9 Q' w! p8 P' S
[quote]引用第25楼hunhunli于2008-04-03 10:52发表的 :, U9 _, _3 b1 o( R
那标称为110-240V 25W的又该如何计算?还有其功率远小于25W的该如何测试?(电压加到300V了功率也还小于25W)
6 y) {3 t8 ^( [4 K! @6 d电热器具功率升不到应有值11章里的1.15倍该怎么办啊[/quot 0 k) Y' [) |( n- @, s# u" p
你说的那种应该是带PTC发热 元件的,你看下第5.13章节,0 D' {5 w! U3 u& C/ @; A3 [
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5 N1 d& }1 b' y' L比如说带PTC发热的器具,220-240V, 2400W. 在230V稳定下测量的功率小于2400W. 那么在做11.7的时候系数该用 √1.15 x 240V = 257.4V ? 6 z" Y& A( e+ C
根据5.13: The test for appliances with PTC heating elements are carried out at a voltage corresponding to the specified power input. When a power input greater than the rated power input is specified, the factor for multipluing the voltage is equal to the square root of the factor for mutiplying the power input. |
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