DSH 752 Definition of a flame for glow wire test

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 752

Definition of a flame for glow wire test

11-12

60695-2-11 & 60695-2-12 & 60695-2-13

( m/ n% D% n6 O2 n3 @Standard(s): No. Year
IEC 60695-2-11
IEC 60695-2-12
IEC 60695-2-13
DSH 0752
2009
Category:
VARIOUS - GENERAL
Sub-clauses:
0 y0 D, i/ @6 ]  @( r. y11 - 12
# x, H1 @+ ?0 @$ UDeveloped by:
1 @* U$ n0 i; w+ P) \WG4 – WG2
8 _, c& c3 h% ?7 dSubject:
. @( t/ O+ b8 \. `: Y; ODefinition of a flame for glow
) Y2 S2 ^' k" E' q  V' |6 xwire test
Key words:
6 `$ F. w/ U1 j& B! ?! G- Glow wire test
- Flame
' W+ Z$ y& o" g( h7 x- Corona Effect
" j* ^- g) E' [2 w+ X: e- Ionized gasses
- Ignition of the sample
Approved at the 47th CTL
Plenary Meeting, year 2010.
Question:
How is the “Corona-Effect” to be interpreted when performing the Glow Wire Test?
  V9 B( {. `# W0 t; E  XDecision:
* P# N; I: r0 Q4 s5 ADuring the glow wire test (according to the temperature settings required by the standard), the
following phenomena can occur:
1. If a brightly shining flame is observed directly at the test specimen (see picture 1), this is a
clear indication of an ignition. Some materials show a colourless transparent flame
instead of a bright shiny flame. This is considered to be ignition of the test specimen, if the
2 N% o$ E) h# M  ]maximum flaming time allowed by the standard is exceeded.
: v+ |' F" H) s3 Z2 _2. Sometimes, a circular corona can be observed around the tip of the glow wire, see picture
2. This corona consists of ionized gas, predominantly blue in colour and is located in the
0 U% Q1 q3 ~5 y  q! [4 Iimmediate vicinity of the glow wire. This phenomenon is not considered to be ignition of
the test specimen, as long as it does not lead to an ignition of the test specimen according
to point 1.
3. Furthermore, ionized gasses can sometimes be noticed along the glow wire (see picture
3). This effect is also not considered to be ignition of the test specimen, as long as it does
! L+ R5 ~- R. }not lead to an ignition of the test specimen according to point 1.

! M2 H# ]) b" ]# x- F  z
$ M, I8 a7 [8 Z* m  r: i