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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。, Q8 I' E9 d( x W
仅以IEC 60598-1为例：% @0 B9 x/ T8 ~3 _( N+ Q$ V
1. 套管安装：6 M1 I2 Q3 E( I' T* |5 A/ W+ W
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in# ?5 L" \2 Y6 T/ D& [# }' ]
position when switches, lampholders, terminals, wires or similar parts have been mounted.* B( s0 \2 c' w$ L
; i. G2 ? O4 g
2. 用于温度保护功能：
0 }) {+ F& d5 X1 S% _8 e4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
( U E5 j/ Y2 |2 H: O$ Zthe luminaire, either a connection shall be provided at the point of entry of the external wiring" ^% J4 y9 d V7 H+ m
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
/ f: r6 C$ W* o+ m" _6 q3 t! O6 vshall be supplied with the luminaire to cover the part of the wiring placed inside it, which; ~# ]" l7 n6 s3 @: ?! X8 Y
exceeds the wiring temperature limit.! U7 Z7 l8 v. \+ p
% p& q4 p( s% n* E) A. b- A0 F) q( o# `
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）
- R# y6 ?" R6 K! c4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
6 Z& _& v* {& dand thermal strength.
( ~; I' q i y% M' oCompliance is checked by inspection, by manual test and by the electric strength test in
9 E' u+ p6 E2 F" q! ^* waccordance with Section 10. The thermal properties of wire and sleeve are checked in( l# Q* z/ }" q
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
% R2 y! |6 D+ w) F+ R Y1 T: htemperature exceeding the values given in Table 12.2 of Section 12 shall comply with the* Y7 J0 a1 Z+ K7 J
requirements of IEC 60684, taking into account the temperature measured on the wire in
?1 ]; J7 q8 e* v- t& }- Pquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured* C! y; d. P- W
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）
' t! \, w, |! Q( d( N
1 w8 B1 l6 ]+ k, s. t4. 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。
: D8 j- y3 H2 A" v附电线的绝缘层厚度：
+ G* [2 d+ o- d$ A4 J6 \1 C5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
/ ?( n1 N- w0 Z/ s2 t" cthe disconnection from the mains is relied upon by the external protection device(s), the
- t; b; d2 ?3 o8 K: E- I% \following is applicable:- j: p! e% b4 v4 t
For normal operating currents higher than 2 A:
6 C+ P V# H2 z! L4 @– nominal cross-sectional area: minimum 0,5 mm2,# p: B) _# t( h! ]
– for through-wiring of fixed luminaires: minimum 1,5 mm2,
5 A- f" _5 i5 t. D– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).# ]5 P' r- R5 H3 ~
For mechanical protected wiring carrying normal operating currents lower than 2 A:+ j* x' q* m( w7 l
– nominal cross-sectional area: minimum 0,4 mm2,
7 j* C7 Z4 R# J9 |) I' _9 _– 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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