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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。: Q2 O6 C+ o4 l+ D' N; L) D
仅以IEC 60598-1为例：
4 D$ f% a; Q# n1. 套管安装：5 p: M4 B$ ?$ ~3 N
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
) t; ^3 q7 i! V6 X3 Q0 i. m2 B tposition when switches, lampholders, terminals, wires or similar parts have been mounted.
) s5 P3 _ h) |2 {: l0 X# O0 Z
8 W5 e7 o/ _4 U+ v( d" v2. 用于温度保护功能：
2 }# ?5 k* P6 z: X9 t4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
4 z( `' \! N9 D9 }9 E: [the luminaire, either a connection shall be provided at the point of entry of the external wiring) J. X, G8 J' N% Z
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
+ E9 K& y0 `7 N7 |: Rshall be supplied with the luminaire to cover the part of the wiring placed inside it, which; ~ p7 l. q) e3 ?( D1 r7 d% [
exceeds the wiring temperature limit.+ ~8 V6 h# I& _3 {$ u
; S. V5 b+ ~, j: b. N. i9 I' \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）
5 r) {* r0 o9 _4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical. v- h8 _( P0 i# A# v, a- K+ b' F
and thermal strength. ; d8 z. g2 x5 @3 [
Compliance is checked by inspection, by manual test and by the electric strength test in, n; i$ |# l4 G% v1 @) {
accordance with Section 10. The thermal properties of wire and sleeve are checked in
& }, S( U/ V( ?accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a( Z# F0 a' R) F
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
# y E: z& `: L. W3 G9 C+ erequirements of IEC 60684, taking into account the temperature measured on the wire in
6 U% A+ \5 [. \. iquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured
- _# k8 [3 W# Q7 Q9 |5 {$ Pon 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）
+ B" ?! r* w' }+ s7 p- U. ^6 q( ]: j) K+ d! m. y# R* p- W5 F
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。" P. B3 l# v; q) W% d6 O8 ^
附电线的绝缘层厚度： H+ ?& Y: b$ w9 y u- y5 d
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
( d5 ]$ ?9 S% I( f5 _the disconnection from the mains is relied upon by the external protection device(s), the# u; N( }' c' F9 z# V
following is applicable:
3 p) x0 \& M$ Y4 i1 R, ]For normal operating currents higher than 2 A:
, v6 O3 f7 c' A# b– nominal cross-sectional area: minimum 0,5 mm2,
: w6 J0 y x8 G( x* {4 C. t– for through-wiring of fixed luminaires: minimum 1,5 mm2,
3 c' I0 J( ^+ w6 A– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
5 c0 q4 O3 B: b8 j) \2 @( q2 AFor mechanical protected wiring carrying normal operating currents lower than 2 A:
( S( q$ s3 a% n q! }4 C& B– nominal cross-sectional area: minimum 0,4 mm2,( C7 Z4 p# G! q% d
– 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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