标题: 灯具爬电距离问题 [打印本页] 作者: 付小胜 时间: 2018-9-14 11:04 标题: 灯具爬电距离问题 现有一类灯具产品，电源输出端与输入端有隔离，输出电压49V，请问输出部分（线路板和元器件）到灯具铝壳之间有没有电气/爬电的要求？! C0 |+ F# Z+ r. b
按照附录M,应该是电气0.2mm，爬电1.2mm。但是条款中又说No values are specified for working voltages below 25 V r.m.s. and 60 V d.c. as the test voltage of Table 10.2 is considered sufficient.那就是说如果耐压能过，就没有电气/爬电的要求。" e2 O% S$ t+ _; U* w 作者: Lordin 时间: 2018-9-15 11:14
结合下 5.3.1.5 和 8.2.3 条款进行考虑 —— 2 x6 `& P/ \) H5.3.1.5 The SELV current-carrying parts do not have to be insulated. However, if insulation is ' H( I, g( d. kapplied, they shall be tested as mentioned in Section 10. ' H. S; ?0 k7 u% ]+ Z" {0 U) n6 a9 ~5 i' T( Q
8.2.3 c) SELV circuits may have exposed current carrying parts under the following conditions. : z y- \8 f v3 S– For ordinary luminaires:," ]: a, }. _# s6 r; G2 Q
• the voltage under load does not exceed 25 V r.m.s. or 60 V ripple-free d.c. and - O, w$ {3 [; M& B% `, e• the no-load voltage does not exceed 35 V peak or 60 V ripple-free d.c.) k" J- `, f8 f
where the voltage exceeds 25 V r.m.s. or 60 V d.c., the touch current does not exceed: ( [# d# |/ _ B6 w+ C7 ?$ t• for a.c.: 0,7 mA (peak);% b) y% @5 |$ o
• for d.c.: 2,0 mA. . o( g0 v4 r m2 q1 _$ q( S, mIf the voltages or currents exceed the values given above, at least one of the conductive $ h! m$ n+ Q& U& r) _5 iparts in the SELV circuit shall be insulated by insulation capable of withstanding a test' J, ^3 D, ^: n X I! F+ d4 {
voltage of 500 V r.m.s. for 1 min.# E {, z0 ]' v3 I$ C
– For luminaires which are other than ordinary the nominal voltage (under load and under7 q2 y! x8 a. T& W9 `0 |8 Y
no load) does not exceed 12 V r.m.s. or 30 V ripple-free d.c.. When the luminaire is/ G; z% v( t' P6 `
opened for light source replacement, the voltage limits for ordinary luminaires are) J* ]: @7 g; |2 i! t1 ]5 k
applicable (for parts only accessible during maintenance).作者: 原任 时间: 2018-9-17 22:58
首先，隔离不等于selv；selv 60V以下是没有爬电和电气间隙的要求；) p3 P( |: h% y
如果不是selv，我们是一般是这样处理，＜220V,按220V考核；大于220V，按实际电压考核。 ' t+ y* R. T, j7 Wps，注意爬电和电气间隙的一个是峰值一个是 有效值作者: 原任 时间: 2018-9-17 22:59
首先，隔离不等于selv；selv 60V以下是没有爬电和电气间隙的要求；& j' \) y! D; ^
如果不是selv，我们是一般是这样处理，＜220V,按220V考核；大于220V，按实际电压考核。 1 P' l v% E6 a" O( g" d0 R% fps，注意爬电和电气间隙的一个是峰值一个是 有效值作者: 付小胜 时间: 2018-9-18 19:19