UL859/UL1727 直发器的功率测量疑问

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UL859 、UL1727直发器(PTC发热器件)的功率测量：是一分钟后测量瞬时功率 还是 测量平均功率？请做过的朋友帮忙解答下，谢谢！
% f: y) \( e+ h1 k4 zUL859 原文：
6 @3 Q* ?/ t) \36 Power Input Test
0 r7 ?0 K4 e% `- @( `! i7 r: ~36.1 The power input to an appliance marked with a rating of 50 watts or less shall be within the inclusive range of 75– 110 percent of that rating. If the marked rating is greater than 50 watts, the power input shall be within the inclusive range of 90 – 110 percent of that rating.
; g5 g9 u- b  l7 h$ b# z' C36.2 With respect to 36.1, the wattage of an appliance marked with its electrical rating only in amperes and volts will be assumed to be the product of those two values.
36.3 The power input to the appliance is to be measured with the appliance at operating temperature under full-load conditions, and while connected to a circuit of a voltage in accordance with 37.1.13. Control switches or the equivalent, if provided, are to be set to give the maximum power input. For an appliance having a preheat cycle of operation as defined in 3.23, the maximum input value measured during the preheat cycle, with the appliance at room temperature at the beginning of the measurement, is to be used to determine compliance with the requirement specified in 36.1.
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Exception: The power input of an appliance that uses a positive temperature coefficient (PTC) heating element shall be measured 1 minute after it has become energized.


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1 C0 K  v1 \" c) u$ L41 Power Input Test （UL1727）
41.1 The current or power input to an appliance rated 50 watts or less shall be within the inclusive range of 75 – 110 percent of that rating. If the marked rating is greater than 50 watts, the current or power input shall be within the inclusive range of 90 – 110 percent of the rating.
41.2 The current or power input to the appliance is to be measured with the appliance at intended operating temperature under full-load conditions, and while connected to a circuit of a voltage in accordance with 37.2. Control switches or the equivalent, if provided, are to be set to give the maximum power input.
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! ?% z% W- O3 C2 f' OException: The current or power input of an appliance that uses a positive temperature coefficient (PTC) heating element shall be measured 1 minute after it has become energized.
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fengweihua

我的理解：通电后立即测量，测量1分钟，算出平均功率。

zyhua1985

前面说那么大一段，其实是说功率限制的，要看关键语句
Exception: The power input of an appliance that uses a positive temperature coefficient (PTC) heating element shall be measured 1 minute after it has become energized
说的就是PTC发热器具是测试通电后，在最大档位下，正常运行1分钟时的功率，如果遇到部分特殊PTC发热器具，在1分钟时测的的值是跳动的，那就记录跳动前的功率。
. L( Y9 {; k6 f+ f% D& ^! Q我们公司是做直发器的，通常就是PTC的直发器就测试1分钟功率，发热丝的就测试开机后的最大功率

Jason020

老搭档的看法：测试通电后1分钟时候的功率。

qqpltdj

???
( B, I9 ~8 M! Z" d很不明白,这个是一通电就开始测试吗??
' K0 i* \: u2 X; dPTC 刚刚通电时功率变化很大啊,一分钟能从100多降到20-30W啊

liuyingcai

通电后一分钟时记录功率。