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发表于 2008-4-8 10:02
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引用第27楼0321于2008-04-03 15:43发表的 :, V4 ^3 J s2 Z3 N# a
[quote]引用第25楼hunhunli于2008-04-03 10:52发表的 :
) ]' Z2 |( m- {/ _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)
& T3 F3 \7 ]) \: h" |/ t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 3 C8 } V( y! E# 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 W/ L0 }! ?% R8 e
....... ! w8 p+ j) |, {: t
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 ?
; f! u0 }9 _8 Z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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