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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。 n- R5 E6 E$ I+ {
仅以IEC 60598-1为例：
$ w! t3 b: u: Y3 K! z9 y( t1. 套管安装：. B0 x. Y* o/ w2 J6 }5 @ ?! n
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
! K# f' {" N5 @8 p: T7 Q1 P, Rposition when switches, lampholders, terminals, wires or similar parts have been mounted.
/ Z: T+ n; Y6 j7 n
. R# Y H$ f8 p. Q. p2. 用于温度保护功能：
1 {, ?6 a b, y5 @. d* Q4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
' {3 |; C9 W8 h( j8 ^& ^7 [9 a/ tthe luminaire, either a connection shall be provided at the point of entry of the external wiring# `- f, _* y3 z6 T6 y
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts4 t w+ X' W$ t7 h! Q
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which
: q9 V( @0 U2 Y* Xexceeds the wiring temperature limit.
9 f" C# a/ M4 O, p* U# a7 B4 N _* x2 Z/ `/ {% N& _ P7 K U
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）
+ \7 l9 }6 r) a4 D6 o& C" G4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical3 }5 J# R# I7 ?" U9 Y0 l3 e
and thermal strength.
. w: A8 _# Y2 qCompliance is checked by inspection, by manual test and by the electric strength test in
% o0 }$ e, k9 H; @4 I6 ^: j; Q4 S$ v8 O+ ]accordance with Section 10. The thermal properties of wire and sleeve are checked in# X) Y' }, z* y, @, v
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
: f8 D0 R3 N9 ]1 z9 etemperature exceeding the values given in Table 12.2 of Section 12 shall comply with the6 m" h" ^( \, N; i/ W0 ?
requirements of IEC 60684, taking into account the temperature measured on the wire in" v" @5 P; A/ `
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
- w$ j: R+ C, O1 O6 I% P+ Y0 o5 Aon 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）
9 U H& k3 I1 G6 t- q$ \9 b8 ^0 h$ W$ v% \
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。 j* l& r9 b" M
附电线的绝缘层厚度：& o/ h+ _' u8 h T0 Y* K
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
; w" H6 Y, n: N3 ithe disconnection from the mains is relied upon by the external protection device(s), the
6 K) Q# S$ @+ [; P0 j/ ~3 C4 K mfollowing is applicable:5 ~: { I/ G: p4 }+ Q$ z! B
For normal operating currents higher than 2 A:
' I7 S; o1 w t& ~– nominal cross-sectional area: minimum 0,5 mm2, D8 N$ ^/ T" f! A* V$ z2 m0 F
– for through-wiring of fixed luminaires: minimum 1,5 mm2,
% e7 M) F3 |: v" H, I4 [# Z– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
3 R% Y4 _9 ]; H: c; W1 S2 w: S& FFor mechanical protected wiring carrying normal operating currents lower than 2 A:
5 s+ [, @3 p& |* e% A% ?! y– nominal cross-sectional area: minimum 0,4 mm2,
b: U9 C' Z A! I' 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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