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30.2.2 For appliances that are operated while attended, parts of non-metallic material
' Y9 s# v0 ~2 r& ysupporting current-carrying connections, and parts of non-metallic material within a distance3 _! T/ T% Q5 [: k
of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11.
0 d) g) f$ r2 U0 l" E' ]; AHowever, the glow-wire test is not carried out on parts of material classified as having a glowwire
" Q2 W' S9 W, f" Q, Yflammability index according to IEC 60695-2-12 of at least
2 G6 Z# `1 g7 x– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,
8 D0 D! s+ d. j5 j& W( e– 650 °C, for other connections.) {' }0 C/ B3 r B% ^8 t, @. U
If the glow-wire flammability index is not available for a sample with a thickness within3 n5 J, {8 s4 e% U% c7 Y @, J3 f
± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest
0 r" V/ R5 H% Z bpreferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.# w8 _" \" {8 g
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.
( m+ u* h" x0 k0 e: o) h E) k0 kWhere a non-metallic material is within 3 mm of a current carrying connection, but is shielded
1 }5 [; ?* h& x0 r$ }. d$ g0 m6 ^from the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out
/ @! y5 ]' X. t9 [at the relevant temperature with the tip of the glow-wire applied to the interposed shielding
1 e4 _% t/ Y. Q4 t6 wmaterial with the shielded material in place and not directly to the shielded material.
1 z9 R+ k% O4 X9 n' JWhen the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are( Z( c2 P( S! p( s/ \
– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,, F" \! P+ f" e8 A8 j! N5 W: M% N
– 650 °C, for other connections.. [3 e' G7 H! j p/ F5 Q
如果中间挡板能经受住同等温度的灼热丝测试,则不需要对零件3mm内挡板以外的非金属材料进行灼热丝测试,因为就算电弧导致起火,经过挡板隔离后是则不认为可以蔓延至外部零件的,故不需要对其外部零件进行测试。 |
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