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glow-wire test 的总定义:
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Parts of non-metallic material shall be resistant to ignition and spread of fire.$ u$ R- a% S( t
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)1 q# | T& O% s3 h" X P7 c8 U
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! ^0 M& v1 D' f5 ~0 `! i再看:$ F0 ?+ O s4 h- F$ p' O
& k9 L8 N/ O+ h9 `2 r* y30.2.2 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
- u; W2 H; B6 m, t/ `of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11.
C/ d) m, F7 [However, the glow-wire test is not carried out on parts of material classified as having a glowwire. t/ U$ i8 h' [2 X
flammability index according to IEC 60695-2-12 of at least
3 D3 n7 H% P# I, G; t9 _2 H– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,1 O7 ?8 l! V/ @1 b
– 650 °C, for other connections.' Z" J% j: ^! h; {7 |; f; ]
If the glow-wire flammability index is not available for a sample with a thickness within# {3 Z: \0 h! z3 d: q
± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest
6 {2 P2 `4 L" {: F& Ppreferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.! b/ q- n6 E# R7 k: j# K
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." }# G: V3 D7 q0 y
Where a non-metallic material is within 3 mm of a current carrying connection, but is shielded
% |9 F9 w. R0 V, Z H8 J0 `7 ofrom the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out
+ p4 N5 F0 [5 O1 \% e5 @& Z- Lat the relevant temperature with the tip of the glow-wire applied to the interposed shielding+ b. M8 n1 I, ?/ Y8 ]" Y% J! Y
material with the shielded material in place and not directly to the shielded material.
% r3 O& M9 n, V& x8 [- e* C+ hWhen the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are
% f8 x2 z/ ^& d/ L- i M& \– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,. f+ C1 V4 b0 C$ n7 z8 ^5 ^
– 650 °C, for other connections.0 `; p |# b0 @" l5 V/ h( U1 [
NOTE 2 Contacts in components such as switch contacts are considered to be connections./ ?2 C/ E( I8 X( L d
NOTE 3 The tip of the glow-wire should be applied to the part in the vicinity of the connection.
+ R# ?# _( Z! w: H8 g) vThis test is not applicable to:0 ^; Z. M# T* u5 V4 X/ n0 a8 {* ]
– parts supporting welded connections;
, ?' k# T- O, |– parts supporting connections in low-power circuits described in 19.11.1;
; M" o, |+ C% Y– soldered connections on printed circuit boards;4 w, Y$ M) a6 T% S: ~. A
– connections on small components on printed circuit boards;
& Q5 S% I: P% C( ]& a( Cand parts within 3 mm of any of these connections.7 n; u- S- M7 F% d
NOTE 4 Examples of small components are diodes, transistors, resistors, inductors, integrated circuits and capacitors not directly connected to the supply mains.0 A: X6 W- x6 v+ K9 K
It is also not applicable to:6 W( E. o# F( x7 j: o- J% Q
– hand-held appliances;5 N4 n+ C+ b( _; r) k, }$ e
– appliances that have to be kept switched on by hand or foot;- [, ~: r+ M* W+ ]. T% Q
– appliances that are continuously loaded by hand. - s. x) }# p8 l: U( }0 T0 ^
(IEC 60335-1-2006 Clause 30.2.2) |
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