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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。$ e; W; w, E6 R& A% K% x4 V# q ?
仅以IEC 60598-1为例：+ l; R2 D/ `5 i' O2 ^
1. 套管安装：
6 z/ A& T8 a* ]2 z1 Q. T4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in* q% Q. a) h* v) {+ j6 l& v
position when switches, lampholders, terminals, wires or similar parts have been mounted.
& U$ G, a2 ] w, j' z/ M
6 W6 q( g- Z. j3 Z2. 用于温度保护功能：
3 c; w+ M2 n7 g2 A1 o* D( n8 j$ \4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside' S( \( ~- K7 L$ J) [. ]
the luminaire, either a connection shall be provided at the point of entry of the external wiring
' E8 N. k; ~! c* e0 \) K! S9 Qinto the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts: L2 `- S8 x" v4 I
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which
: V+ ^9 N( ?' {) V% v; A2 pexceeds the wiring temperature limit.
8 L" W* Y5 e ]9 p7 j% E1 o/ e2 |3 I) C* c, l! }! P
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）) Q, K8 [$ I; C5 _& ?+ {
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical' L4 w2 t1 Y8 n8 X
and thermal strength. % ]. g7 ]0 X5 ~
Compliance is checked by inspection, by manual test and by the electric strength test in
7 G1 r, W( U7 }* u1 C! naccordance with Section 10. The thermal properties of wire and sleeve are checked in3 ]( S0 C9 W& ]% {: l
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a' i& D( q' E5 D' `* `$ p5 W2 n
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
, |( \ {2 M9 t1 P& y: u( J+ jrequirements of IEC 60684, taking into account the temperature measured on the wire in2 H2 a! K; h' o' G9 i( E& ^
question. The sleeve shall be resistant to a temperature exceeding the temperature measured4 U Y7 }) v, U6 w, G+ x+ P: H6 ]* B
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）. O N- d2 p; ` e, H: G
+ `4 e) I. o7 o9 ?9 H* 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。! g) w( T; D7 ?, Z+ Y
附电线的绝缘层厚度：1 R9 O) r" C" J) c; U3 @
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
5 G3 ?/ `- R3 i7 n, K4 jthe disconnection from the mains is relied upon by the external protection device(s), the$ z( R& z! t7 `
following is applicable:3 d* f6 n) F9 O* R5 [" V) M
For normal operating currents higher than 2 A:
1 l3 d: X: H0 E# a1 ^$ i% B– nominal cross-sectional area: minimum 0,5 mm2,
8 } }8 m% ^6 ?+ r% g( r7 G* q ]5 {7 v– for through-wiring of fixed luminaires: minimum 1,5 mm2,
. p/ ]6 J, k% {4 Y– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).7 Y3 Y3 n" s% E9 X1 O% C1 C
For mechanical protected wiring carrying normal operating currents lower than 2 A:
0 n% D; M% \. c$ `0 d5 b1 Y– nominal cross-sectional area: minimum 0,4 mm2,
@( D; E' c, O' a; \– 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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