这份报告中的NC,NB,CT是什么的缩写？

火水晶

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[td]

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 time	Fuse #	Fuse current (A)	Observation
COMPONENT FAILURE TEST QPS5120	--	--	--	--	--	--
IC104 (op amp)	Short Pn 2 to ref gnd	48Vdc	Instantly	Power Board/ Test fixture F1	30A	NC, NB, unit shut down
U101 (opto)	Short Pn 2 to ref gnd	48Vdc	Instantly	Same	30A	NC, NB, unit shut down
IC200 (feedbacK)	Pin 3-4 Short	48Vdc	Instantly	Same	30A	NC, NB, unit shut down
ABNORMAL OPERATION TESTS	--	--	--	--	--	--
EUT QPS5120	No forced air, in wind tunnel ambient	48Vdc	2:05hrs	Power Board/ Test fixture F1	30A	NB, 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

NB 是no break down 即电气强度可以
NC 是没有碳化现象
0 M& D$ g# z, u% t6 lNT是没有超过温度限值
+ U8 _4 B; x, e* h& z0 x8 r9 z  i
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
+ }$ d. _& s6 s. B. j, E% B0 s

zhh0815

这个报告没有这些缩写解释吗？

火水晶

zhh0815 发表于 2013-10-14 16:19
这个报告没有这些缩写解释吗？

6 ?. j; U" c- u. ^2 W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

IP = Internal protection operated (component indicated) CT = Constant temperatures were
$ R( _0 ]  j" u1 fobtained CD = Components damaged (damaged components indicated) NB = No indication of dielectric
8 v) @( Z; L9 @9 X( Abreakdown NC = Cheesecloth remained intact NT = Tissue paper remained intact

stey

一般报告后面会有注解。

火水晶

wpcily 发表于 2013-10-14 16:56
5 o9 a8 }" l- _# N9 n7 `5 `IP = Internal protection operated (component indicated) CT = Constant temperatures were
obtained CD ...

. D4 V+ i" b* F& s3 [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

stey 发表于 2013-10-14 17:45
4 r+ ^' E1 o" k' u( i' U$ l. U! S一般报告后面会有注解。

在这份报告中没有找到。

wpcily

火水晶 发表于 2013-10-15 08:36
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)
' ^  W% r. d% I. e' B) n( CCT  Constant temperatures were obtained
TW  Transformer winding opened
1 s; r! {2 Y5 ?+ u$ f& s8 ZCD  Components damaged (list damaged components)
% w! G$ F' D- ~; m) V- I3 Q# TNB  No indication of dielectric breakdown       
4 T/ u. ]  y( c' p9 F; _YB  Dielectric breakdown (indicate time and location)
' C6 D2 q8 \' R/ H. ]. PNC  Cheesecloth remained intact
- @# n% k& _+ M: zYC  Cheesecloth charred or flamed
NT  Tissue paper remained intact
1 N" s+ c( q0 vYT  Tissue paper charred or flamed