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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。. J1 ^" F+ A2 b% a
仅以IEC 60598-1为例：
) e5 s+ Y8 k+ ]5 q. z, f+ d8 R1. 套管安装：
$ y B( n( ?; {$ ]( A+ b- j4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in9 E" n. V' Q) K# q0 @
position when switches, lampholders, terminals, wires or similar parts have been mounted.
9 [$ q$ C0 V5 G. T
7 S" K8 p" I4 l2 L# V2. 用于温度保护功能：
; z @# Q2 D& K; |0 z" F, ]4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
/ Z/ i" a# a5 U- c9 l* `; _1 a5 Tthe luminaire, either a connection shall be provided at the point of entry of the external wiring
7 R1 b# r2 L; ]into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
$ H( S3 J* n2 J8 v' Vshall be supplied with the luminaire to cover the part of the wiring placed inside it, which
% A B5 v! X( n, O/ {exceeds the wiring temperature limit.7 N! s& y) v1 C$ h% S- q4 c; M
^* _+ i8 [5 B& B% k$ F6 D1 d3. 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）
. D H6 N5 G5 l6 `; o4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
$ W. L" L( T0 iand thermal strength. ' s8 l3 a B0 M7 ]% H9 I
Compliance is checked by inspection, by manual test and by the electric strength test in3 K7 j" n4 C7 f# Q3 S" J6 E3 u
accordance with Section 10. The thermal properties of wire and sleeve are checked in
4 X) M9 v) i( o/ J1 `* c- f& laccordance with Section 12. Heat resistant sleeves used as covering for wires attaining a8 h! u) R% n9 z( l
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
; g: X( C. ]2 p; Hrequirements of IEC 60684, taking into account the temperature measured on the wire in3 g r" M' v6 g3 W) ?4 h1 X4 v8 p
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
! O' |- Q. Z* S4 _8 n: |$ ?& k 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）
/ a/ ~$ w% E4 D! p4 @; g( l+ C- X! u4 O2 t6 H
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。
" P3 F% u$ O: N' q. a+ z附电线的绝缘层厚度： M3 q/ ]1 r4 D" v+ `* n
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
$ f) m: j2 X9 O+ Bthe disconnection from the mains is relied upon by the external protection device(s), the2 t1 q q1 O. H0 G I7 Z
following is applicable:
8 M D, ^% s9 r: q( F M* QFor normal operating currents higher than 2 A:
2 o+ e% V- J- B" F: s* D0 I$ }& z/ X– nominal cross-sectional area: minimum 0,5 mm2,
* v* p# A# @$ v. } L2 n– for through-wiring of fixed luminaires: minimum 1,5 mm2,
9 j1 G! w3 t7 B& D/ V. m! @– nominal insulation thickness: minimum 0,6 mm (PVC or rubber)., q4 _% o( ^+ x" o( Q
For mechanical protected wiring carrying normal operating currents lower than 2 A:! E/ \ i8 k+ {2 A J5 S8 O: V
– nominal cross-sectional area: minimum 0,4 mm2,: Y x7 `2 r4 N9 [
– 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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