Definition of a flame for glow wire test& h1 A/ t/ h* X
11-12 0 z3 ?9 K' ~: W: y! B
60695-2-11 & 60695-2-12 & 60695-2-13 ! H; l ]! `% S+ w& N) E
1 n" ?/ |' k3 d! R1 UStandard(s): No. Year: N. C" Y. h8 ]9 V- @
IEC 60695-2-11 2 U4 l M: g8 A2 |* m% sIEC 60695-2-12 ( f8 h/ X. v5 a3 @. KIEC 60695-2-13 o7 @. H" p7 |- P4 w0 L- S
DSH 07527 z M K8 U0 v" S3 L4 A8 {$ F4 t8 C
2009 e- Q- O/ i; ~# G
Category: 7 F8 D1 {' z# e9 r% O( aVARIOUS - GENERAL , f$ g: n! a0 U/ I' N* k" B8 hSub-clauses: 0 i5 j c$ e+ _& z F4 |$ `. a" ^7 ~) e11 - 12 3 d+ Q/ _! c: T9 `2 T( Z' p$ xDeveloped by:$ h7 }4 Z- R' ~6 F- ]) ~
WG4 – WG2- c- e. y8 B% x& S
Subject:1 y5 i# E9 m& l" @) N+ X w
Definition of a flame for glow8 ^# }4 p, V7 w3 { g
wire test3 }2 c9 x; P( j5 U$ f/ P
Key words:- K) Y. L7 ?- P- M" i& Q$ B
- Glow wire test ) p$ X1 _/ s7 `& v2 g9 @+ |- Flame " k& K' N) e; g) d& {3 e' k( I- Corona Effect0 a& `4 x, V, Y
- Ionized gasses( b& h2 }* h2 w
- Ignition of the sample 1 \: t# Y* l4 g3 e, HApproved at the 47th CTL; S3 d0 F+ n3 D+ _( a/ S
Plenary Meeting, year 2010. % R7 x. O# M: D. N J3 G2 ?Question:! Y0 L3 H9 }6 V9 z; K/ {+ o
How is the “Corona-Effect” to be interpreted when performing the Glow Wire Test? 0 X7 `, T# l! K8 f/ _% _Decision: 7 d! Z1 z9 `) v; P# o) C/ VDuring the glow wire test (according to the temperature settings required by the standard), the , p) Y' [, L1 f2 h1 f" _0 f c' T% Tfollowing phenomena can occur:( {6 ]) _" R0 A+ O
1. If a brightly shining flame is observed directly at the test specimen (see picture 1), this is a6 _4 y! b$ } Z$ Z3 ^0 E/ D1 ?$ j
clear indication of an ignition. Some materials show a colourless transparent flame( f! U5 y- ]: l- Y" T
instead of a bright shiny flame. This is considered to be ignition of the test specimen, if the' p. R4 i M7 \, j J- B: m/ U6 L$ \& y
maximum flaming time allowed by the standard is exceeded. 1 J* N, w, m+ v$ D' Z3 ]2. Sometimes, a circular corona can be observed around the tip of the glow wire, see picture, H! M4 n; _$ b+ x
2. This corona consists of ionized gas, predominantly blue in colour and is located in the# D. U* T2 P4 x/ f0 A* F1 T
immediate vicinity of the glow wire. This phenomenon is not considered to be ignition of 7 M7 S3 x" R5 Qthe test specimen, as long as it does not lead to an ignition of the test specimen according . O' w; N1 Q% S. M* cto point 1. 4 c4 o7 T8 M$ y7 U! T' Z3. Furthermore, ionized gasses can sometimes be noticed along the glow wire (see picture- f& \' {1 I o- J
3). This effect is also not considered to be ignition of the test specimen, as long as it does ; k! O+ M2 `0 [- ]* M$ ^, Rnot lead to an ignition of the test specimen according to point 1.$ t& X3 f: Z& p- f# V2 {( {, |) r' D
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[attach]77309[/attach]8 O, P8 H8 ]% U. a1 N8 U. Q3 @6 f
DSH 752, ^4 |0 z/ n& y