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 4 J2 s/ Y. W( i7 B/ @+ o(V)	Test time	Fuse #	Fuse current 5 W3 o" r/ o$ M$ s8 E(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.

8 D3 E( T5 {, V3 F2 N3 ~3 V

wpcily

火水晶 发表于 2013-10-15 08:36
. F9 I& e' m! t6 L2 c这个是在什么资料中有说明吗？能否上传让大家学习一下？

! F. G, M  q+ M  tUL的datasheet上有描述的。详细的如下：
IP  Internal protection operated (list component)
3 g: y+ `) |) U) k. K9 aCT  Constant temperatures were obtained
, I$ O) {: P/ @# I/ o8 o9 OTW  Transformer winding opened
CD  Components damaged (list damaged components)
NB  No indication of dielectric breakdown       
+ {. b0 k- U, f4 IYB  Dielectric breakdown (indicate time and location)
NC  Cheesecloth remained intact
YC  Cheesecloth charred or flamed
: h8 w  k* g( V+ ONT  Tissue paper remained intact
YT  Tissue paper charred or flamed

火水晶

stey 发表于 2013-10-14 17:45
一般报告后面会有注解。

# A) L0 x+ E6 X1 ?& l2 _4 S( y在这份报告中没有找到。

火水晶

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

- [  x% U5 M0 o$ F4 k: d# G" V这个是在什么资料中有说明吗？能否上传让大家学习一下？

stey

一般报告后面会有注解。

wpcily

IP = Internal protection operated (component indicated) CT = Constant temperatures were
* s; e- z4 _, {3 Qobtained CD = Components damaged (damaged components indicated) NB = No indication of dielectric
; O# J6 l: D, tbreakdown NC = Cheesecloth remained intact NT = Tissue paper remained intact

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？

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？

zhh0815

这个报告没有这些缩写解释吗？

Nezof

NB 是no break down 即电气强度可以
, ~! G7 H6 W7 V' [0 |! bNC 是没有碳化现象
  g; X4 z. X! \' I. \NT是没有超过温度限值

$ c+ m) G1 @7 n4 x$ o: e& a9 U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
% l0 T+ {# I5 R* g7 f+ B4 D