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glow-wire test 的总定义：5 s! t5 s" U- z8 C3 z; S5 Q( @. q3 P
- |$ [- M+ X& @# B5 e, `
Parts of non-metallic material shall be resistant to ignition and spread of fire.
$ `6 S" B( N% `( ^' PThis 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）* u x- [; X0 H0 o& l! p3 n0 T
3 Q2 X/ i' m8 F1 L
m3 z% T' A2 ~2 g4 k b, J+ `再看：2 Y7 A9 P9 T% t& E: [1 p- C( ^
$ M3 r- o6 e: v: H |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( l5 s7 {+ z1 h5 W. T- m
of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11. 3 z3 \" g$ @/ A/ V
However, the glow-wire test is not carried out on parts of material classified as having a glowwire% e; A- K" ]& ?% y- ~# ?
flammability index according to IEC 60695-2-12 of at least/ @+ Q# \9 ?: w6 b: c: z2 `
– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,
: u0 J/ A4 O% X6 F4 A: p$ p– 650 °C, for other connections.$ p0 h) y3 H/ o6 ^" m# U
If the glow-wire flammability index is not available for a sample with a thickness within
+ H* ~, K& ]+ Y' ~6 s± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest1 \+ t; d3 r) q, h: M$ t# `
preferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.. m" [" Y6 G9 V0 s3 q4 D
NOTE 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.: j! C0 p) N# h6 W$ E6 w$ [
Where a non-metallic material is within 3 mm of a current carrying connection, but is shielded
) u7 [2 y) @( i: `from the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out% W% y: x, N2 h; d/ H: ~
at the relevant temperature with the tip of the glow-wire applied to the interposed shielding6 b) K: m. I& f h4 Y8 q) P$ p
material with the shielded material in place and not directly to the shielded material.* I' }+ O$ K! k; d" {+ J; o' V8 `2 g
When the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are
( F, m, m1 q: z6 m" P" M0 i– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,
K' ^2 \: u9 a0 n– 650 °C, for other connections.
/ s2 ~0 N$ `* J. H) _) tNOTE 2 Contacts in components such as switch contacts are considered to be connections.- U; ?$ ^2 B4 M! O5 G
NOTE 3 The tip of the glow-wire should be applied to the part in the vicinity of the connection.
{3 g {* T) M2 i) o+ {9 uThis test is not applicable to:* s; H3 z+ j& a9 ]# `
– parts supporting welded connections;
8 y- Y% U4 @( q+ t2 R– parts supporting connections in low-power circuits described in 19.11.1;5 S# E/ D; C0 L7 t% V- L$ `: U
– soldered connections on printed circuit boards;' |+ x; ]3 P; y
– connections on small components on printed circuit boards;
( [/ s# n1 ]. Y( ?' k( yand parts within 3 mm of any of these connections.
1 v7 ]2 A7 M ~7 P$ [. DNOTE 4 Examples of small components are diodes, transistors, resistors, inductors, integrated circuits and capacitors not directly connected to the supply mains." k o: [2 l3 R& a5 v
It is also not applicable to:3 h& u9 K; V6 t2 q# s
– hand-held appliances;& t9 k$ t) _$ [' a
– appliances that have to be kept switched on by hand or foot;7 w7 e: i$ ^) M( q
– appliances that are continuously loaded by hand.
4 z0 U. A. b8 d# Z, v6 C（IEC 60335-1-2006 Clause 30.2.2） |
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发表于 2007-6-1 21:07
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