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glow-wire test 的总定义：
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0 C3 f: Z, W' V' R' eParts of non-metallic material shall be resistant to ignition and spread of fire.( n; N! M0 d- F R# H9 C- j L
This requirement does not apply to decorative trims, knobs and other parts unlikely to be ignited or to propagate flames that originate inside the appliance. （IEC 60335-1-2006 Clause 30.2）2 j/ Q/ p5 ~5 ?+ b- |
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! r2 i7 z d0 |4 q! ^/ d. E再看：
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30.2.2 For appliances that are operated while attended, parts of non-metallic material supporting current-carrying connections, and parts of non-metallic material within a distance ~3 n& Q+ Y( F* S5 ]4 g w
of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11. 5 Y4 k6 F/ |& ~% Q( H9 W3 Q
However, the glow-wire test is not carried out on parts of material classified as having a glowwire
7 s! ~$ E4 y! h. L* ?flammability index according to IEC 60695-2-12 of at least
* T! ]. N; \' v+ n* s% K; M) @- @2 C– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,
% K5 q( B: T: I( c– 650 °C, for other connections.
8 h( X. G7 a* b2 \If the glow-wire flammability index is not available for a sample with a thickness within5 e3 L) e# x6 o) l) d" P( e
± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest: _( _3 I) f- f8 e7 _
preferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.
. B R6 e; X9 bNOTE 1 The preferred values in IEC 60695-2-12 are 0,75 mm ± 0,1 mm, 1,5 mm ± 0,1 mm and 3,0 mm ± 0,2 mm.7 d; C- L: p! w
Where a non-metallic material is within 3 mm of a current carrying connection, but is shielded( c; c d3 w* @- x3 i
from the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out$ u& p* z4 x# c: |8 `# q
at the relevant temperature with the tip of the glow-wire applied to the interposed shielding
% m$ f: k9 x H- E3 Jmaterial with the shielded material in place and not directly to the shielded material.
3 Y+ c7 k9 ?: n+ F2 l3 KWhen the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are
$ \# K$ m7 e1 o' Y– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,' Z3 s" o( S# [ D6 g, I' W
– 650 °C, for other connections./ J; j3 e2 i$ G& P( u; E
NOTE 2 Contacts in components such as switch contacts are considered to be connections.
3 d9 I& `( `+ Z2 {NOTE 3 The tip of the glow-wire should be applied to the part in the vicinity of the connection.
+ y# U8 Q4 K% \3 `- A! R0 }, iThis test is not applicable to:
' O! J1 \5 s! ~" n– parts supporting welded connections;
% y. k. j7 {" h' B: E( U– parts supporting connections in low-power circuits described in 19.11.1;
1 f# R7 m5 W4 ^– soldered connections on printed circuit boards;
/ g1 N) U3 z- ^8 u3 s' p3 p– connections on small components on printed circuit boards;8 `+ F3 l/ |# u
and parts within 3 mm of any of these connections.
- i9 D' v$ ~# y8 d( FNOTE 4 Examples of small components are diodes, transistors, resistors, inductors, integrated circuits and capacitors not directly connected to the supply mains.' a! S% X* Q. u# V+ w H9 Z
It is also not applicable to:
6 ~5 q6 g9 T2 H$ @4 \– hand-held appliances;
7 {. Z' O8 h% f– appliances that have to be kept switched on by hand or foot;1 @; V% L8 P F6 c1 J6 ^7 c+ b, e
– appliances that are continuously loaded by hand. 0 | z* ^7 ^- Q: f
（IEC 60335-1-2006 Clause 30.2.2） |
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发表于 2007-6-1 21:07
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