火水晶 发表于 2013-10-14 15:54

这份报告中的NC,NB,CT是什么的缩写？


5.3 TABLE: fault condition tests Pass
ambient temperature ( ° C)............................... : 85—
Power source for EUT: Manufacturer, model/type, output rating................................................... : EBC series—
Component No. Fault Supply voltage
(V) Test timeFuse #Fuse current
(A) Observation
COMPONENT FAILURE TEST QPS5120------------
IC104 (op amp)Short Pn 2 to ref gnd 48VdcInstantly Power Board/ Test fixture F1 30ANC, NB, unit shut down
U101 (opto)Short Pn 2 to ref gnd 48VdcInstantly Same 30ANC, NB, unit shut down
IC200 (feedbacK)Pin 3-4 Short 48VdcInstantly Same 30ANC, NB, unit shut down
ABNORMAL OPERATION TESTS------------
EUT QPS5120No forced air, in wind tunnel ambient48Vdc2:05hrsPower Board/ Test fixture F1 30ANB, NC, CT Output loaded to 12.5A @ 12Vdcmain T1 core = 116.7°CMain T1 PWB trace = 118.2°C, Ambient = 48°CWithout air flow, the ambient and load is de-rated to the maximum shown here in the resultsBased on output current efficiency de-rating curves, 48V input has the highest output efficiency.

Nezof 发表于 2013-10-14 15:58

NB 是no break down 即电气强度可以
NC 是没有碳化现象
NT是没有超过温度限值

当然，上述是我根据字面和你的图猜的，具体可以通过看标准求证

zhh0815 发表于 2013-10-14 16:19

这个报告没有这些缩写解释吗？

火水晶 发表于 2013-10-14 16:29

zhh0815 发表于 2013-10-14 16:19 static/image/common/back.gif
这个报告没有这些缩写解释吗？

没有找到。这是一份UL报告。UL报告的解释一般会在什么地方？

wpcily 发表于 2013-10-14 16:56

IP = Internal protection operated (component indicated) CT = Constant temperatures were
obtained CD = Components damaged (damaged components indicated) NB = No indication of dielectric
breakdown NC = Cheesecloth remained intact NT = Tissue paper remained intact

stey 发表于 2013-10-14 17:45

一般报告后面会有注解。

火水晶 发表于 2013-10-15 08:36

wpcily 发表于 2013-10-14 16:56 static/image/common/back.gif
IP = Internal protection operated (component indicated) CT = Constant temperatures were
obtained CD ...

这个是在什么资料中有说明吗？能否上传让大家学习一下？

火水晶 发表于 2013-10-15 08:37

stey 发表于 2013-10-14 17:45 static/image/common/back.gif
一般报告后面会有注解。

在这份报告中没有找到。

wpcily 发表于 2013-10-15 11:19

火水晶 发表于 2013-10-15 08:36 static/image/common/back.gif
这个是在什么资料中有说明吗？能否上传让大家学习一下？

UL的datasheet上有描述的。详细的如下：
IP  Internal protection operated (list component)
CT  Constant temperatures were obtained
TW  Transformer winding opened
CD  Components damaged (list damaged components)
NB  No indication of dielectric breakdown       
YB  Dielectric breakdown (indicate time and location)
NC  Cheesecloth remained intact
YC  Cheesecloth charred or flamed
NT  Tissue paper remained intact
YT  Tissue paper charred or flamed
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