|
|
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。
4 e C% u3 [ {# b, |& Y$ X2 C仅以IEC 60598-1为例:& X- F; i" Q9 d H& G! x5 q% S
1. 套管安装:/ d5 ?2 O& }4 O, _4 h3 L: H4 @
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
6 A1 x3 F/ u& J8 l9 `position when switches, lampholders, terminals, wires or similar parts have been mounted.7 C5 B$ g, V, \* d
6 Q2 Z J- _6 l2. 用于温度保护功能:
; X M2 H/ [. M* M$ h3 |4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
( _& V+ k7 v* H' |0 K$ V% _the luminaire, either a connection shall be provided at the point of entry of the external wiring" c5 ~6 S) A. Y1 R; v& O# T
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts. Y2 S; Q' J! J B6 F9 r" [; ~
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which
9 l- |1 M. C' y$ q, ]exceeds the wiring temperature limit.
0 j& W# H' P* v- U/ H, ]9 q9 h3 [
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)1 I2 [6 d! Q) ^ ?4 b* S! U
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical! J# M/ K2 `; T
and thermal strength.
1 n0 _' h! ]; g. Z) \Compliance is checked by inspection, by manual test and by the electric strength test in1 o9 D4 T; P" a1 T# J
accordance with Section 10. The thermal properties of wire and sleeve are checked in# o8 y2 c' B7 @, l R
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a: v; H3 Y, `' K8 |: D6 z
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the& f& J# x& M0 s% j. n3 U
requirements of IEC 60684, taking into account the temperature measured on the wire in
" r: ^( a4 t7 r: X7 `. hquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured; \ [! r( i4 ~. d. ^' b' Q7 Q
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& [0 j* ~6 G& W: X8 e8 h2 I& u
' s% J5 a+ I/ b/ F: F0 d4. 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。& E" S4 D5 G. Q9 h9 q7 _. O( R& n3 T
附电线的绝缘层厚度:
, J. j0 d* a5 S5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
( }* v5 g9 L# A* O; d; w: ?! Ithe disconnection from the mains is relied upon by the external protection device(s), the
7 s% p o" ]* ^following is applicable:. ]5 c" O! C9 k
For normal operating currents higher than 2 A:. W: ? C V# j6 R H; T
– nominal cross-sectional area: minimum 0,5 mm2,: T* `; A+ s L6 x
– for through-wiring of fixed luminaires: minimum 1,5 mm2,
9 }! v2 K5 m" Z& T8 d3 @; l$ ` v– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
" h3 u. A- {2 r. ?! sFor mechanical protected wiring carrying normal operating currents lower than 2 A:
) R" ^- Q$ _0 T) {( ]! k1 k' e– nominal cross-sectional area: minimum 0,4 mm2,
0 [* v3 x. n6 F– nominal insulation thickness: minimum 0,5 mm (PVC or rubber). |
|