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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。0 E( p- t( X4 B' \& y
仅以IEC 60598-1为例：
8 M0 o, f; u+ H/ G% U$ n. S1. 套管安装：( N: W9 y5 X" W+ L9 P3 e, v2 N
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
% T! ]( E# K H/ |9 M2 xposition when switches, lampholders, terminals, wires or similar parts have been mounted.
$ h* X( S2 p+ f: T
* C: v9 h% F. ]2 _: Y2. 用于温度保护功能：4 l' j8 F: z# U; c
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
b' E' }- K1 ~the luminaire, either a connection shall be provided at the point of entry of the external wiring+ |8 L( s, I% } J/ n( ^/ ]( D
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
; V. i: i( ~3 d% }# D0 xshall be supplied with the luminaire to cover the part of the wiring placed inside it, which. M) o8 k+ N4 ~/ y
exceeds the wiring temperature limit.
2 F8 m; t8 L; _% }# n* [
9 i8 f/ ?/ T2 I& @6 z4 K: g3. 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）8 \% i* ? j; p3 H: C" X$ a
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical5 C# O1 W0 O3 U, q6 ~4 P
and thermal strength. 8 S4 b4 A$ o, a* ^0 e2 }
Compliance is checked by inspection, by manual test and by the electric strength test in
+ w1 U' H A* y8 Haccordance with Section 10. The thermal properties of wire and sleeve are checked in! D C1 g8 Y% i3 D. Y7 U
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a3 M) G) Z4 p3 b" \3 x7 a8 G, ?
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the$ }% v6 r4 n* C7 |% q
requirements of IEC 60684, taking into account the temperature measured on the wire in
# F) m g8 r* f6 pquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured
! P1 m8 V1 M0 Son 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）1 a( l+ G/ }2 H; n9 }
/ ?; y, {% f3 H* C4. 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。% }1 x p% g; D; K
附电线的绝缘层厚度：
" y0 J- G- K6 ^# b5 G0 C5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
# a5 j4 u) N ^0 ?1 Rthe disconnection from the mains is relied upon by the external protection device(s), the
$ {* i5 F' d H" cfollowing is applicable:6 h2 k' H, Q4 @6 }9 n; M! a
For normal operating currents higher than 2 A:
- S/ n G5 _6 |, Q8 i– nominal cross-sectional area: minimum 0,5 mm2,8 { Q. l9 o+ \' Q5 X$ n- S: n$ b
– for through-wiring of fixed luminaires: minimum 1,5 mm2,$ [$ ~; `: }2 g/ J/ D4 m, f+ I
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
$ J# g: y; R$ qFor mechanical protected wiring carrying normal operating currents lower than 2 A:
3 W: Z, q2 v4 Z– nominal cross-sectional area: minimum 0,4 mm2,, _- ]. F- }4 m
– 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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