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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。
- f* O/ L4 s2 F( W仅以IEC 60598-1为例：7 o# X4 L) Q& f1 \3 @/ M
1. 套管安装：, f$ ~/ W; C- Z7 m7 M# A& [, N) I
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
1 q- x% ?/ g, o/ p: t" kposition when switches, lampholders, terminals, wires or similar parts have been mounted.: q: T F8 C0 [( ?
! U3 p+ a& a4 A4 \; z) x# _
2. 用于温度保护功能：- R. J& ]5 v. N( A2 ]& u8 ~
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
+ E) g" Y0 @5 j2 \' k% t% L9 Tthe luminaire, either a connection shall be provided at the point of entry of the external wiring
. A8 i, Y! r1 g% hinto the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts% S' O5 z! A" f" k
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which$ N& J, @2 [) Q) m, Z. b4 X, |
exceeds the wiring temperature limit.
% K t" r5 [ m+ s
+ `- P _# f4 N3 X3. 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）
; q% }! q( F, V) n7 u; P9 t4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
6 t% O3 T3 f3 C: N x S; N% i% R5 K8 h( D$ aand thermal strength. 1 I6 x! a3 G5 {: ]$ A0 } s q
Compliance is checked by inspection, by manual test and by the electric strength test in
4 v) A: d- x8 Q' {' vaccordance with Section 10. The thermal properties of wire and sleeve are checked in& u! R% E5 Z" K( a0 S1 U
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a+ ]5 A3 D* B* `7 {' C
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the5 B$ ~- D \ \) k+ i; f( ?7 |9 d
requirements of IEC 60684, taking into account the temperature measured on the wire in3 M. T' j, F% X2 C& K2 W
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
7 A1 C" k4 R5 Aon 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）; ^9 H @. i! v& W. a$ @; H: g( U) d
6 r! {( P0 v$ I& D4. 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。/ `* r8 W! {, H5 \& k
附电线的绝缘层厚度：
2 {( [( Q0 g* M2 ^$ v1 C+ J! W) V5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
4 ~; ~* w" x/ S0 Othe disconnection from the mains is relied upon by the external protection device(s), the
/ l! j) q7 [0 f. d9 Y6 i; Tfollowing is applicable:
; A& e5 [. l5 D3 @" d' o' K4 F% ^For normal operating currents higher than 2 A:
" S- e: B9 s3 T+ v2 r# f3 ]– nominal cross-sectional area: minimum 0,5 mm2,
" G& A% I* h/ `: |) n" Z- c– for through-wiring of fixed luminaires: minimum 1,5 mm2,8 r4 w9 O) A/ @. K3 N& h
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).9 v2 P3 Z8 K( R) D. T
For mechanical protected wiring carrying normal operating currents lower than 2 A:
! H' G2 @" [" G* G& d# c– nominal cross-sectional area: minimum 0,4 mm2,
# f* L' H; ] `8 g9 |- M! e– 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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