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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。
. U0 W% N5 P, [" x N1 c仅以IEC 60598-1为例：- ]$ y8 A& c# Q( H
1. 套管安装：# B* _$ o# f; A' B9 X
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in2 R7 J7 d; q2 t; ]6 E P
position when switches, lampholders, terminals, wires or similar parts have been mounted.
1 d% X8 n$ B4 Z- H! W, R4 A2 e7 ]$ u% x0 L0 v' v$ e
2. 用于温度保护功能：
3 {& \" `1 s. o1 h$ x& f2 T) ?/ ^4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside8 e- G. |! T# F. b7 n2 l
the luminaire, either a connection shall be provided at the point of entry of the external wiring
, b U; `/ Q( d1 d! Linto the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts% H4 A! H4 \3 u+ {5 o
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which* F; b% j( L0 R( A0 a* y9 r Y
exceeds the wiring temperature limit.
T @0 h5 Y3 ?) K0 M" q" b+ E
; l! a+ u A9 R* `& c* I6 K3. 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）
& F5 G: ~" T3 d6 A4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
% j, z8 M. f ^2 _% z1 c0 J9 @6 Band thermal strength.
! h% l# N1 O N5 P& j* ZCompliance is checked by inspection, by manual test and by the electric strength test in
* l3 I! ~% I$ f1 P, E8 oaccordance with Section 10. The thermal properties of wire and sleeve are checked in8 q2 p9 ^1 G( t& l
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
( ]7 U) ]" o# n, r' L5 I( ctemperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
7 N/ |) Y+ `1 _+ f2 T1 orequirements of IEC 60684, taking into account the temperature measured on the wire in: L _( x* C. P2 L$ q
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
, S A6 z1 l8 x" Lon 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）
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% A& O6 \( J( ^# @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。7 x% p" h1 a' X0 B! [
附电线的绝缘层厚度：6 G5 L% ]4 N p" N
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and+ w; Z$ j6 Y* j9 y4 ?# \( m5 N5 i
the disconnection from the mains is relied upon by the external protection device(s), the
' J4 Z4 K7 X3 ?" f& U% U, @' ifollowing is applicable:0 a9 h4 @! L8 a+ [, A
For normal operating currents higher than 2 A:
" W% e1 n3 k* y. L# O– nominal cross-sectional area: minimum 0,5 mm2,
u1 ]0 j+ b- l, T1 z8 y/ k1 ?– for through-wiring of fixed luminaires: minimum 1,5 mm2,; e3 y4 v0 H" ?* Y3 i
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).0 g( p' F; n. H8 l
For mechanical protected wiring carrying normal operating currents lower than 2 A:
6 T s( \0 t% v9 R, r7 y2 i– nominal cross-sectional area: minimum 0,4 mm2,; n) D8 S# y; G( m! _' i. I7 \
– 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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