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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 ]/ p+ ]) [" r9 G0 [/ L' s3 P
仅以IEC 60598-1为例：: A9 ]2 d( s2 A' J1 X; c5 T4 W) C ?
1. 套管安装：% S X! N4 O3 t' U( n8 x
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
1 R# b& M; Q. O+ L+ Hposition when switches, lampholders, terminals, wires or similar parts have been mounted.. x1 r( c" E5 p# W. f% l
9 A) |% _' S4 [0 b
2. 用于温度保护功能：8 L* ?* e7 W& M. I* V
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside* f1 U/ `- I' D5 M
the luminaire, either a connection shall be provided at the point of entry of the external wiring1 |5 ` }5 q# p
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
; O+ Q& x" M8 d, dshall be supplied with the luminaire to cover the part of the wiring placed inside it, which
2 Z, m0 y3 |7 V; n! u& vexceeds the wiring temperature limit.- | D' I* M$ z) l) }
# O/ N* R% ^3 [1 w! u- H3. 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）: R" i7 f! e" [) v5 Z
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical5 N1 Z* ?2 g! M: [& F
and thermal strength. ' Z( Y2 w" K* [7 A( l
Compliance is checked by inspection, by manual test and by the electric strength test in
+ B5 z4 q* C$ L/ G L7 ^accordance with Section 10. The thermal properties of wire and sleeve are checked in
; S( `9 @* R% u# ^' ` `4 naccordance with Section 12. Heat resistant sleeves used as covering for wires attaining a1 \& B8 C; ]/ Y. T% Q
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
' a1 `$ y( x5 c* Srequirements of IEC 60684, taking into account the temperature measured on the wire in; d8 g* w& b% v. B9 I8 F
question. The sleeve shall be resistant to a temperature exceeding the temperature measured1 w& q$ F8 [/ g6 Q+ Z0 O
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）
; n; C$ {- e) ?3 }4 X( X B9 M" r! s0 _, _7 Y
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。
" k* Q q& M, C1 [# z# Y# E* H附电线的绝缘层厚度：, V7 @* K) K8 R- Z5 q' s
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and: Y" A$ @! s! E- v. h
the disconnection from the mains is relied upon by the external protection device(s), the
" `5 M& J2 J) _! L" o4 q" @; z: m) ffollowing is applicable:! Z5 Q$ h' X" R- H/ Y+ q
For normal operating currents higher than 2 A:( z/ t; |1 \3 |% p
– nominal cross-sectional area: minimum 0,5 mm2,0 B9 q# I$ v. V6 v/ _, D, D
– for through-wiring of fixed luminaires: minimum 1,5 mm2,5 W1 F7 i4 N5 G# w/ W! ]4 |
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).' K! b; J& l6 i' O# ^- K
For mechanical protected wiring carrying normal operating currents lower than 2 A:
* P6 W Z/ i- w% z& D– nominal cross-sectional area: minimum 0,4 mm2,
0 z7 _$ C9 j+ I5 p– 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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