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glow-wire test 的总定义：& ?" p2 N5 @/ v, y
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Parts of non-metallic material shall be resistant to ignition and spread of fire.& t' C) _- j+ J. Q
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）7 M7 @( M# J( ?+ Y. N$ G- K; n2 m
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再看：
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' o0 D' h* c4 P4 m/ b30.2.2 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: b6 }/ q/ }4 v4 Y2 I3 K
of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11.
( W7 ]0 t& z4 t( kHowever, the glow-wire test is not carried out on parts of material classified as having a glowwire
: o2 u) t" X6 m+ k2 Gflammability index according to IEC 60695-2-12 of at least: U% F+ x! Y8 M9 R$ m$ w# P
– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,+ V$ q! O+ y8 ~
– 650 °C, for other connections.
) g$ n" V t) Q9 JIf the glow-wire flammability index is not available for a sample with a thickness within
4 s- O! ^) N! l" X' F; X+ Q± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest8 e; U& u& ^# ]6 V% H
preferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.
: _. Z9 u8 `4 k; ONOTE 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% M# F: _/ o3 Q3 i; A( [- y; v3 wWhere a non-metallic material is within 3 mm of a current carrying connection, but is shielded1 r) _- N3 z+ F4 _0 q4 @! v* {6 D
from the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out) K5 L6 _( D, x- M
at the relevant temperature with the tip of the glow-wire applied to the interposed shielding" w& f2 Q: b1 C) e2 W
material with the shielded material in place and not directly to the shielded material.
0 _6 ~0 k" c/ ~: ?9 l: A' ^! vWhen the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are4 p, e' H) }: n6 f/ `, N
– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,2 m$ k: a6 a4 w3 a8 S+ {
– 650 °C, for other connections.
9 ]6 ]$ p. t$ D9 U' B5 N; PNOTE 2 Contacts in components such as switch contacts are considered to be connections.
* N' l2 C7 s/ I, L2 SNOTE 3 The tip of the glow-wire should be applied to the part in the vicinity of the connection.9 o% m% q8 h$ K( {
This test is not applicable to:% w* a" j s$ W' X/ d3 @$ G5 [
– parts supporting welded connections;% X5 _9 F' C1 z9 T6 c* M; v
– parts supporting connections in low-power circuits described in 19.11.1;( e$ A# k9 O; Y4 O
– soldered connections on printed circuit boards;
* @( r$ i- _& Z6 O; ^) D8 {& u' B– connections on small components on printed circuit boards;
0 @: V9 _6 o, q. [) Zand parts within 3 mm of any of these connections.
# {3 Q+ K3 }: y7 V6 Y" G9 \$ M; BNOTE 4 Examples of small components are diodes, transistors, resistors, inductors, integrated circuits and capacitors not directly connected to the supply mains.
( ]/ z3 g' u1 U- V- m: p0 rIt is also not applicable to:" {/ `" }5 g/ A) I) ]
– hand-held appliances;
$ s4 L& W4 U; {+ m– appliances that have to be kept switched on by hand or foot;! N5 b: L% \+ o G$ T+ U, U
– appliances that are continuously loaded by hand.
- S) Z+ _4 s9 q. w0 p: X3 T（IEC 60335-1-2006 Clause 30.2.2） |
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发表于 2007-6-1 21:07
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