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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。3 C0 y* Q6 Q; H2 {# J
仅以IEC 60598-1为例：+ b9 ]/ b2 |. x; u( w, }
1. 套管安装：
! h: i/ [7 w/ w E! g, m: p& O4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in9 {. p/ C F. t! ~
position when switches, lampholders, terminals, wires or similar parts have been mounted. N; b& z# |. s& E
2 A# x+ X V6 e5 B5 h3 X# D
2. 用于温度保护功能：
* k# E' N% L. m2 ^0 _7 O4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
* r4 P/ t( u. O9 Ithe luminaire, either a connection shall be provided at the point of entry of the external wiring3 P& J. H# q7 s
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
7 u( a3 ~. _. N8 a9 Cshall be supplied with the luminaire to cover the part of the wiring placed inside it, which
- v( c3 k0 d& k1 o/ Z' k7 rexceeds the wiring temperature limit. {+ s! q# g, \! i) F
7 Y' Y) O+ P3 r
3. 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）6 A8 J9 q" b/ d; [' |3 \
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
2 Z" x4 P; c2 s2 Pand thermal strength.
4 `- ~; k+ D; o% X8 `Compliance is checked by inspection, by manual test and by the electric strength test in$ l6 r3 Y/ I0 X ]6 x7 O6 ~, e
accordance with Section 10. The thermal properties of wire and sleeve are checked in
- ^; O Y6 L4 {, L+ q. K- {accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a6 w8 \ d: c1 a
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the6 X4 s* A$ J, t- t- I6 n( w" d/ ~
requirements of IEC 60684, taking into account the temperature measured on the wire in
! N' \3 i6 Y' ?; m5 Z0 d5 k3 l% X3 Zquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured( j v, a1 w6 a9 R( m
on 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）
/ X) {) A+ ]! r3 c$ h/ S6 I8 }# S2 w* H
4. 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。
# w4 X$ e0 q! L附电线的绝缘层厚度：
( {. o( ]$ @; _( }: D" j' U5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
% [, S; F" Z) Q$ e" I; l5 u3 sthe disconnection from the mains is relied upon by the external protection device(s), the" x5 m C+ S0 e) }) X- j
following is applicable:7 }) t* Q* ]' r& T4 r
For normal operating currents higher than 2 A:
! e( Y5 [; u3 k) s– nominal cross-sectional area: minimum 0,5 mm2,
- Z# X+ o) N1 D* Y+ }8 J% c( A– for through-wiring of fixed luminaires: minimum 1,5 mm2,
4 s4 l2 V8 a, i+ Y; M0 p, {– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).7 c" T$ {* L$ K
For mechanical protected wiring carrying normal operating currents lower than 2 A:4 R* A# L, W1 O) j1 j! Y, x
– nominal cross-sectional area: minimum 0,4 mm2,8 L1 q3 S& t' b b* v0 r; h
– 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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