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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。8 V8 N3 e2 H5 P8 Z+ ~7 c
仅以IEC 60598-1为例：: _1 p; K( r% _- b
1. 套管安装：6 b+ s K% Z1 o: w+ U3 G; |7 V) T* l4 h
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in- L% F/ v; ]% z- L; Q
position when switches, lampholders, terminals, wires or similar parts have been mounted.( T6 f/ |3 T- i9 U
* Z2 u" I S1 A9 |2. 用于温度保护功能：
" M6 h U% m5 R* b) O/ Y4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside* ]; a9 I# _ O
the luminaire, either a connection shall be provided at the point of entry of the external wiring& q" g) l. N0 \5 W# Y& H
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
5 w. S% s! R/ B9 @- m/ A' w/ Y) Ushall be supplied with the luminaire to cover the part of the wiring placed inside it, which
# d) ~% J! v( l8 Oexceeds the wiring temperature limit.7 v1 O. S1 w" A( d* T: T1 }
* Q8 [) y4 M8 R6 `; U1 r* 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 q$ G: D# O- x2 |/ p
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical, f9 G$ F& Z/ @! @8 {
and thermal strength.
8 c( D4 ^7 ?' N5 R# eCompliance is checked by inspection, by manual test and by the electric strength test in+ T/ O7 Q" y m% D2 t
accordance with Section 10. The thermal properties of wire and sleeve are checked in
: r7 [( N7 j% W& T, G. Caccordance with Section 12. Heat resistant sleeves used as covering for wires attaining a" w$ W/ A* _9 @7 T' ^ t" x2 H& ?
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
& n o1 d' l9 B, l1 ]+ Y3 B$ N9 }requirements of IEC 60684, taking into account the temperature measured on the wire in. B5 u! M" t0 X+ S
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
k2 x+ p6 e" P& O$ {% p; z' don 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）6 h7 m1 t- |: y2 a. J
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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。
) E; e3 l. c8 R! |附电线的绝缘层厚度：% m5 C- V6 V1 @
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and+ x# o/ |4 U" c' d4 i- M
the disconnection from the mains is relied upon by the external protection device(s), the
* ?: P. Z( d! }- g0 t. O! Rfollowing is applicable:$ W" ~! U! ~& t0 z
For normal operating currents higher than 2 A:
4 R, g8 h4 |8 |) t) g: P– nominal cross-sectional area: minimum 0,5 mm2,' N) P+ i: E& H7 _ I
– for through-wiring of fixed luminaires: minimum 1,5 mm2,$ p5 p* H) I* }3 T% g2 w% N
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
2 d* T$ i% S, [! `3 W% H5 uFor mechanical protected wiring carrying normal operating currents lower than 2 A:
- s0 U4 E6 T. p j$ }– nominal cross-sectional area: minimum 0,4 mm2,, w: U6 z" A. L6 \3 h: l
– 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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