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glow-wire test 的总定义:
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6 Z" x7 z, f1 ~9 u+ cParts of non-metallic material shall be resistant to ignition and spread of fire.
1 O' _' Y2 Y. u$ ?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)
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* Y! t! h! O' _) A. p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" c: ~8 `, Z, D; o3 x
of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11. 5 Z5 \; k" C( Q( @( z X0 U
However, the glow-wire test is not carried out on parts of material classified as having a glowwire
! n- B$ A- N( K& oflammability index according to IEC 60695-2-12 of at least1 t6 ~ Q2 k* P* T1 ]& r
– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,
2 X I1 ^9 E; p! |7 B– 650 °C, for other connections.9 f% [1 I4 j, m$ J1 i0 w
If the glow-wire flammability index is not available for a sample with a thickness within
' y5 F( D {* f, ^± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest& V# @; S& W/ S" T+ E
preferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.
) Y1 S% F* {0 o/ \9 X7 QNOTE 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.
?, l4 |( D, X$ ]9 jWhere a non-metallic material is within 3 mm of a current carrying connection, but is shielded
" l6 r0 R6 f' u1 X# K6 Afrom the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out5 j0 `: ^* `1 @) y
at the relevant temperature with the tip of the glow-wire applied to the interposed shielding
7 w& ^& E. ]7 B$ e3 O8 j% Pmaterial with the shielded material in place and not directly to the shielded material.
; f) |0 i" P6 f+ ~& Y8 [When the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are
) L& y& O& A1 F/ f1 l( V+ y– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,
% ]) x' I) G# V$ d! v4 x– 650 °C, for other connections.: x( b) W1 ]. q8 g) J/ y0 ]
NOTE 2 Contacts in components such as switch contacts are considered to be connections.
9 d' E1 h+ `' C: qNOTE 3 The tip of the glow-wire should be applied to the part in the vicinity of the connection.3 c2 K7 }* V/ R# x" z
This test is not applicable to:
. P* d' P) G% @– parts supporting welded connections;
N Y- |/ f* Z# u* u2 j k& T– parts supporting connections in low-power circuits described in 19.11.1;
+ ~/ c" @( G0 {6 U) j6 r0 z2 r) y– soldered connections on printed circuit boards;1 Z4 M$ z2 L' V# A' I- k' }, p
– connections on small components on printed circuit boards;
8 f9 \5 z) K' N5 [$ nand parts within 3 mm of any of these connections.
$ ~" r+ i y& N/ ANOTE 4 Examples of small components are diodes, transistors, resistors, inductors, integrated circuits and capacitors not directly connected to the supply mains.
% w4 X6 f! |8 q+ o+ J5 A" sIt is also not applicable to:
) Q9 P) I2 ?$ M; A8 b5 f5 \8 I– hand-held appliances;
) y& |9 O9 b- y A– appliances that have to be kept switched on by hand or foot;; g' k0 i0 u1 e/ g1 J8 D, K( Q
– appliances that are continuously loaded by hand.
6 S6 {4 i1 S2 g* |, q" @4 @(IEC 60335-1-2006 Clause 30.2.2) |
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