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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。6 l9 W( f% [) M7 _3 d$ I e
仅以IEC 60598-1为例：3 x$ r& B5 i. ~; ?
1. 套管安装：( [' @3 p2 w/ ^2 C, `/ o% f
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in9 F( v/ |- G# e9 j, N: a3 Q2 F+ h4 v
position when switches, lampholders, terminals, wires or similar parts have been mounted.
: s w0 G& o) z5 h, {
. ?/ n1 b& n6 l4 o' k$ d2. 用于温度保护功能：
H1 i$ E2 x- M4 V% g2 h4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
4 t1 a, _8 ^. }* T5 H& Cthe luminaire, either a connection shall be provided at the point of entry of the external wiring7 Q3 W) m- G2 k4 {9 C0 Z( K
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts0 s2 W* ]/ f8 h# t/ |9 ^6 b. ^+ d* X
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which" G& h, Z8 R/ u& z' M8 _2 i
exceeds the wiring temperature limit.- |/ C. c( S# Z6 D
) A. J1 r7 G) Z* G- Q P$ \4 c
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）
4 f8 q$ N; O! @+ X8 Z& f# s- x% t4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
. M& g1 o: P- {% Z: o. Band thermal strength.
1 a# w" Z, k$ N. X4 n" lCompliance is checked by inspection, by manual test and by the electric strength test in
$ c2 j5 f5 j: t( ]- t8 f8 @accordance with Section 10. The thermal properties of wire and sleeve are checked in, @: w; X3 N/ y& Q( F
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
, X8 W0 W7 l$ m6 A# D" `temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the$ X3 Z7 i e4 e+ ^
requirements of IEC 60684, taking into account the temperature measured on the wire in
: [& x- S; g* R& o3 wquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured
9 @ J* [! w* |$ }* a! `8 p9 V$ `9 {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）
; \$ E, R3 H$ y& r# m" ?0 {% n& C0 q: 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。1 C% \: k( Q5 p2 s( O/ k6 }
附电线的绝缘层厚度：6 y6 P# g l* j$ V0 l0 m& R; p
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
& I$ q. H3 ~ W1 Lthe disconnection from the mains is relied upon by the external protection device(s), the; w: y" C9 U4 S5 H
following is applicable:8 f7 ]( ^+ q% o: p
For normal operating currents higher than 2 A:
: E7 e; }' B& Y% `, P6 }! ?– nominal cross-sectional area: minimum 0,5 mm2,
- @9 G. Y1 T! P N, X– for through-wiring of fixed luminaires: minimum 1,5 mm2,
# P( M0 w5 {' G– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).7 P: G" J% n. I7 f& _9 K' t" u
For mechanical protected wiring carrying normal operating currents lower than 2 A:4 f+ |9 n+ b; r; b% R+ c# s
– nominal cross-sectional area: minimum 0,4 mm2,
6 f2 \" |- y* D: t– 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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