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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。
0 B. k8 F/ Y* i' M) z9 b# c' u1 m8 c1 ^仅以IEC 60598-1为例:
" T) G" M* Q8 _7 o: U* ^; a1. 套管安装:1 T: v6 [% k, U) N3 |7 \
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in9 X* x5 g5 x, j( D6 {$ Z
position when switches, lampholders, terminals, wires or similar parts have been mounted.+ w; z5 M4 U$ U; G; n
. m- B! R3 m4 w, |4 z2 a5 J
2. 用于温度保护功能:
; x6 s& }; f4 _( P* s7 N( b4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
4 t( ?1 F2 |1 {! c3 G& othe luminaire, either a connection shall be provided at the point of entry of the external wiring6 W4 q: W$ z3 }" e! U
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
; @6 r! [. h3 L" X+ cshall be supplied with the luminaire to cover the part of the wiring placed inside it, which' @; V/ Q+ ]2 M7 W
exceeds the wiring temperature limit.' w# K& Q2 n6 W+ @9 F3 b* x
1 n D* b4 F+ l& u# Z/ H/ D1 f3. 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)4 Q. v9 \) H: _9 e
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
& L. i7 c; m* mand thermal strength.
2 G5 u7 o0 Z( I1 e; V9 ICompliance is checked by inspection, by manual test and by the electric strength test in6 y9 l) f2 u8 U: v/ ~( g, ~
accordance with Section 10. The thermal properties of wire and sleeve are checked in
( R' ~4 q0 j6 q0 m' {4 a- Vaccordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
. [6 l6 [4 e! ]7 }$ q5 Htemperature exceeding the values given in Table 12.2 of Section 12 shall comply with the" h- F: m- J) E$ d1 T
requirements of IEC 60684, taking into account the temperature measured on the wire in8 I' a2 A2 c% X! G/ W
question. The sleeve shall be resistant to a temperature exceeding the temperature measured7 j$ v" w/ n4 C
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), K/ ?- I! t+ r5 x$ V& p/ ~% b' V
4 |( B! Y. H4 l# x4. 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。1 p. f' U1 F( q) K) e- r. ~
附电线的绝缘层厚度:
7 _0 n- n/ _$ R" q! |6 J6 N5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
) ^: n9 W" a' w& fthe disconnection from the mains is relied upon by the external protection device(s), the
. D: U5 J4 t0 b* ~% R4 w9 efollowing is applicable:, |7 M0 R2 T( _
For normal operating currents higher than 2 A:- ~+ P9 f: g! g; K& z' |) O
– nominal cross-sectional area: minimum 0,5 mm2,' |- p2 j, j9 o3 @7 L3 r
– for through-wiring of fixed luminaires: minimum 1,5 mm2,
1 p& i0 {/ ]6 `0 B: z2 i7 j– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).. }8 }$ x, S% F/ V4 |' _
For mechanical protected wiring carrying normal operating currents lower than 2 A:6 Z' U0 [* u6 r$ H1 U
– nominal cross-sectional area: minimum 0,4 mm2,
. ?+ J% q; I% X4 b0 d! x8 ~– nominal insulation thickness: minimum 0,5 mm (PVC or rubber). |
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