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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。5 c$ Z( _; s+ G$ p
仅以IEC 60598-1为例：" q. a n, u! k5 A3 q1 a& k
1. 套管安装：
, K/ A* R, I: h5 r4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in2 X- w/ x6 Q7 _- O* k! A
position when switches, lampholders, terminals, wires or similar parts have been mounted.& w; _: q; H' ?
- a2 k5 N* i, K+ ~7 i1 F" W/ x2. 用于温度保护功能：
4 j- Q0 A z" ^4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside9 X6 \! n1 T& y. w- t
the luminaire, either a connection shall be provided at the point of entry of the external wiring
L. c5 Q5 I0 u# [* l; ?into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
0 f p/ C3 K6 [# C$ z' S2 Tshall be supplied with the luminaire to cover the part of the wiring placed inside it, which
1 G% S7 ^+ p& P7 Oexceeds the wiring temperature limit.
) H9 u( [6 E. T5 X% e8 u2 [: V: b2 h9 y! f+ u8 g% I* t# e5 i- D
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）3 _5 ~9 i6 j5 U
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical) \+ q4 W; x" m
and thermal strength. ) t/ a3 I0 Y, K; }2 q/ T- `
Compliance is checked by inspection, by manual test and by the electric strength test in
1 u1 k. n$ u g' \accordance with Section 10. The thermal properties of wire and sleeve are checked in
% r" o3 ?$ I; {& |accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a. [8 J0 K" v+ ]: |/ Y% L
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the9 l7 k% d5 y, c/ R% f/ G
requirements of IEC 60684, taking into account the temperature measured on the wire in, _$ N* t ?* \/ w1 v
question. The sleeve shall be resistant to a temperature exceeding the temperature measured. Z. m; @! k+ k3 e' J, d" J
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）
4 ]' A/ o: n1 W2 k! F6 o
: M6 p& d( f4 j0 a* Q5 W$ {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。
0 H8 H- g& |" O( m0 ?" {4 x2 e附电线的绝缘层厚度：
& U1 ]' c0 E" [- R! y1 {$ t5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
0 t8 }9 ?2 f: ]$ Z( {$ ythe disconnection from the mains is relied upon by the external protection device(s), the1 \6 x% K: x; R2 _0 B0 a; [3 q
following is applicable:: i6 k" B0 c; S$ x3 J2 o9 q
For normal operating currents higher than 2 A:
/ h/ X5 c) |2 j6 n– nominal cross-sectional area: minimum 0,5 mm2,
T4 I5 _4 s6 ^9 y* R– for through-wiring of fixed luminaires: minimum 1,5 mm2,
2 K! D9 Z2 r9 L$ X! {9 @: A– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).+ O( ^, X: G! H# y3 z& S
For mechanical protected wiring carrying normal operating currents lower than 2 A:7 B/ m+ w4 S4 E1 A; N
– nominal cross-sectional area: minimum 0,4 mm2,/ Q* l1 U4 u" V) 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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