|
|
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" }$ q2 T6 C/ k* O5 a! D* r8 p
仅以IEC 60598-1为例：
4 ^4 _( m3 ?4 i; q5 e1. 套管安装：, `! F* Y. @7 b- H- Q( s) H+ f
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
& M/ A0 P$ p9 Q" l# o( @position when switches, lampholders, terminals, wires or similar parts have been mounted.) a1 X9 S5 N; \0 ?* _
1 I T' n' d% I) L+ P0 _3 \2. 用于温度保护功能：. [0 ?- a5 P8 z: H6 [: t3 p
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
9 V# g" V+ f, n( `8 m D7 F) bthe luminaire, either a connection shall be provided at the point of entry of the external wiring ?: y) @9 C4 k q
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts# \- q8 G& B2 n- b. G0 P
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which
# {. [4 \* I' `2 } Y1 U3 Hexceeds the wiring temperature limit./ V$ z, M4 n `3 z. D
1 r& }% p' n. s# h2 i0 E Z3. 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）
: C9 f/ {1 S! p! P4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
# S0 q% f# @( i% A5 [* U" ]and thermal strength.
+ \7 O2 [$ m( U) ?. }3 ECompliance is checked by inspection, by manual test and by the electric strength test in
7 f# g' N9 L& K& B" xaccordance with Section 10. The thermal properties of wire and sleeve are checked in
( ~, l( t$ e, h# `4 ]5 X. zaccordance with Section 12. Heat resistant sleeves used as covering for wires attaining a& W$ t% [7 C3 E$ L
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
) c& F; d% K, j. ^requirements of IEC 60684, taking into account the temperature measured on the wire in. o4 T7 Y/ z3 N1 T. E% E, P# V/ K
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
; `) j3 k; S3 w+ q) U) K5 k9 qon 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）; i( _4 c9 u9 k1 k6 @! o' @
+ F( f" j% l) K( c; L4. 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。 Y# Q5 \+ D* u1 e; |! n/ y1 S4 S
附电线的绝缘层厚度：3 [9 ~: c- ?/ P4 ?5 Q
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and7 R2 V4 W1 y, P( [, d2 t
the disconnection from the mains is relied upon by the external protection device(s), the
! A8 M- i. g4 g! X/ M7 D3 afollowing is applicable:5 E% Y' A' p( @6 C) ^8 a" N* H2 g
For normal operating currents higher than 2 A:
- C( f) a2 O3 b. y- A2 w0 l& R– nominal cross-sectional area: minimum 0,5 mm2,0 C, G2 M+ \0 C& T# ~# t- E; W
– for through-wiring of fixed luminaires: minimum 1,5 mm2,) [! B3 r: T% W4 G9 n. F( M; t
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
- b* E. X) h+ W) Q; oFor mechanical protected wiring carrying normal operating currents lower than 2 A:5 U# k6 ]" t/ Y) Q1 g& r
– nominal cross-sectional area: minimum 0,4 mm2,
4 J5 O$ |2 d* @, }% g$ s. F– nominal insulation thickness: minimum 0,5 mm (PVC or rubber). |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
发表于 2011-6-24 12:46
显身卡
楼主