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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。
( L$ P4 I: a% _3 _仅以IEC 60598-1为例：: p! X) D3 y5 d& b0 |/ a
1. 套管安装：% a# g& w& \$ s$ x3 n; F
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
5 f& b1 V5 E2 |/ \9 d" G1 \position when switches, lampholders, terminals, wires or similar parts have been mounted.
# }5 O$ J0 h. E2 N( I" z3 d p6 n& K6 P1 y
2. 用于温度保护功能：8 X+ B3 E7 O( H' N
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside5 }# ?" Z4 C8 h) O
the luminaire, either a connection shall be provided at the point of entry of the external wiring& G) Z% _. v/ r* V$ W3 a L6 k* T
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts: B. V1 d1 ] H) [
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which
* I7 Z$ d3 L, m1 gexceeds the wiring temperature limit.5 v1 ]3 k* @' _2 T4 p7 V9 c
5 G* F9 Z6 r, r7 G9 ~, w, Q
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）
6 N( E9 o* W$ S9 _0 a$ l4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
6 P5 b1 X7 X1 `0 |8 Q+ Y. x* Rand thermal strength.
- Y2 J) h+ A9 W! J+ r% E7 s% L# Q1 uCompliance is checked by inspection, by manual test and by the electric strength test in- j4 N k$ {9 y( a! m! A5 o: H
accordance with Section 10. The thermal properties of wire and sleeve are checked in! [, s5 \8 g" E. ], h$ k3 E3 {& _
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a$ R: C: ]7 b- S3 t
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the- {& f6 i. }7 w7 S8 Y; B
requirements of IEC 60684, taking into account the temperature measured on the wire in
. a* d3 M; T/ U3 {1 v- Kquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured Y4 K8 ^* d) l) F5 p$ ~( h
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）, ]. B4 T1 c4 z2 l' F0 F
2 g8 F" p+ y' m o# ^8 Z$ {" B
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。
: A# |. {$ }7 Z: H附电线的绝缘层厚度：
( D, o' l0 R/ I& q5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
8 W7 i9 Q& O3 {7 Fthe disconnection from the mains is relied upon by the external protection device(s), the
. [( @, g2 W& B) ^following is applicable:6 P0 S) D& b2 n! R
For normal operating currents higher than 2 A:
6 \, W1 y/ s% \8 T9 b$ q– nominal cross-sectional area: minimum 0,5 mm2,, s% C6 J2 N* X" H/ K* L
– for through-wiring of fixed luminaires: minimum 1,5 mm2,
" o6 i5 l0 W: s; E– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
- h) y$ K+ U0 o, ^; ]" gFor mechanical protected wiring carrying normal operating currents lower than 2 A:/ O; v) x; f+ j0 H4 N2 N7 @* v
– nominal cross-sectional area: minimum 0,4 mm2,
5 l' E% w# k/ M% m/ n- v' J) w– 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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