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我认为各个标准会有不同的要求，所以想得出一个统一的答案是比较困难的。4 G) d& B3 l1 P. {4 K" I: `, H- ~
仅以IEC 60598-1为例：
2 I b7 q: w) R6 o; X1. 套管安装：
0 F% z ^5 n5 T" t4 ^4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
" O E" v& j: ~! l( ~9 ]; k& xposition when switches, lampholders, terminals, wires or similar parts have been mounted.
q3 Z9 {9 k2 n+ K7 m# m
8 R- X5 M2 L5 f& I% U6 T2. 用于温度保护功能：& J# P, Y/ x' M# B" h [" x
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside: K8 Q* G" s0 }/ n
the luminaire, either a connection shall be provided at the point of entry of the external wiring
4 m, v+ Z5 H9 uinto the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts. m: b% s9 B% F' E2 J& E
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which& w- h1 S$ Z) B6 d
exceeds the wiring temperature limit.
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# W- ]% W8 J3 e% n3. 类似的绝缘功能（具体是基本绝缘，附加绝缘或是加强绝缘看材料达到的测试等级）$ `: \, I0 f$ D1 V: f/ F
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical$ `2 e$ H3 |- M$ l! r" x, Z
and thermal strength. ) P' }# }# r$ m K( v* r
Compliance is checked by inspection, by manual test and by the electric strength test in4 v+ x% h( n5 `1 n( y) c7 [ `
accordance with Section 10. The thermal properties of wire and sleeve are checked in7 ~- J; m5 c) R) t4 T+ c
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
) W, n3 K, c/ w: b D* B2 Jtemperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
0 l" s* p1 A U4 {: J$ I3 E4 Y& Vrequirements of IEC 60684, taking into account the temperature measured on the wire in! F- v# x; X; F% c
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
) [" M6 l* R( m4 uon the wire by 20 °C or withstand the following test（潮态处理，温度处理，耐压测试，泄漏电流测量）
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' c# @& x" t$ C3 t4. 套管厚度，在IEC60598里面没有相应条款指出，是否可用电线绝缘层厚度做参考，我认为不合适。( l1 @$ L1 @! [4 Q4 {5 M
附电线的绝缘层厚度：
8 T% p1 e* b* m3 \1 x* p5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
7 |: Z9 d# R7 @0 @' C# D6 T& \the disconnection from the mains is relied upon by the external protection device(s), the1 j+ } S2 |/ P
following is applicable:! m, M U6 ?! |: W
For normal operating currents higher than 2 A:3 y( m. M: P, J! n* Z3 S
– nominal cross-sectional area: minimum 0,5 mm2,/ E2 ]( A& O( r0 ~9 [4 b
– for through-wiring of fixed luminaires: minimum 1,5 mm2,
4 C9 T2 R! r8 H! o$ ^– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
R) A7 \, ?: K( E% WFor mechanical protected wiring carrying normal operating currents lower than 2 A:
* T# \1 a5 e" H) P2 r– nominal cross-sectional area: minimum 0,4 mm2,
3 w W3 i! C. ~$ O– nominal insulation thickness: minimum 0,5 mm (PVC or rubber). |
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发表于 2011-6-24 12:46
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