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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。
2 Z& y/ D2 }4 s! Q6 W4 ^: ], a仅以IEC 60598-1为例：
' H8 {5 Z' Y& Q; r1. 套管安装：
& I0 B( p% H" o4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
$ l; e: R$ w/ N+ k3 ]; H2 \position when switches, lampholders, terminals, wires or similar parts have been mounted.; h x# Y$ j; a7 T
) T4 s5 L: ]. Q4 ]2. 用于温度保护功能：
! ^( [6 b u( \' S, J3 |) m- V4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside, ?* z, v& b. m6 L7 Y/ d
the luminaire, either a connection shall be provided at the point of entry of the external wiring
- z1 C4 Q5 T6 P% B( X- c: jinto the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts
. \) Y% G( g; G ~. k9 f& {6 W* Sshall be supplied with the luminaire to cover the part of the wiring placed inside it, which
1 ?% x* v, D) I4 x4 r6 Vexceeds the wiring temperature limit.
8 Z; u$ X6 J* c: v( P
9 S5 }6 O( j. \3 }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）
) ?2 e$ O" N7 r/ ~$ i w* Q5 S4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
$ p/ l- A, @" C( p3 fand thermal strength.
- z2 }3 J2 @3 l8 qCompliance is checked by inspection, by manual test and by the electric strength test in( [/ h- E7 w, M8 P; ~5 \7 `
accordance with Section 10. The thermal properties of wire and sleeve are checked in$ q& H) a# \4 v
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
8 z( j+ D7 T0 S0 R9 v2 htemperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
' I: }! [+ c; Y: F/ [, h0 t/ H, j: urequirements of IEC 60684, taking into account the temperature measured on the wire in5 [" w, P' C# ^# r1 R
question. The sleeve shall be resistant to a temperature exceeding the temperature measured1 W* J, g& [# a; 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）" M/ D+ u4 L! r; ~( m
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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。
, V$ a/ H+ i5 ?& V1 l( t附电线的绝缘层厚度：
9 @! C, ^& h4 J, t9 H" }5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and3 Z% U+ F! v5 _
the disconnection from the mains is relied upon by the external protection device(s), the" `0 e/ v1 ~( z' }
following is applicable:" R/ y) a8 `. O( V
For normal operating currents higher than 2 A:! w' ^5 b5 [ R/ D/ [, }5 t
– nominal cross-sectional area: minimum 0,5 mm2,
" G* h2 [4 D' ?$ Z- F0 a– for through-wiring of fixed luminaires: minimum 1,5 mm2,' B+ w3 L9 r8 T" f
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
5 _- t% @0 k9 V& W& @( mFor mechanical protected wiring carrying normal operating currents lower than 2 A:
* F5 I, s2 O& Y( k/ q: t: k– nominal cross-sectional area: minimum 0,4 mm2,, B+ x8 p, }6 f$ s
– 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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