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Safety ELV (SELV) circuit; ?7 j8 P$ P3 w) l9 N' w
electrical circuit with the following characteristics:" M! l( e# G9 m- |- ~5 K. n
• the voltage does not exceed ELV;/ t, w( u, t* l* m7 d' A- P
• protective separation from circuits other than SELV or PELV;% S" G0 Y/ t5 `9 F
• no provisions for earthing of the SELV circuit, or its accessible conductive parts;* T4 I5 o' |! D/ ]1 A
• basic insulation of the SELV circuit from earth and from PELV circuits" Q2 |( K) i8 G" }( X" ?! u
protective ELV (PELV) circuit
: @. J! M0 q# a% J( i$ u4 `; lelectrical circuit with the following characteristics:
: t; e# B2 ?% t7 D7 O( B• the voltage does not continuously exceed ELV under single fault as well as normal
* n; \# G; F8 N9 J# J5 Jconditions;# T9 M( Z2 [' x7 R" H
• protective separation from circuits other than PELV or SELV;
3 p4 s' D) b5 i, | ], x• provisions for earthing of the PELV circuit, or its accessible conductive parts, or both
- J3 e' Y @8 Q7 W请问PELV与SELV有和区别?SLEV的第三句话(no provisions for earthing of the SELV circuit, or its accessible conductive parts;)是什么意思?
' w# l- E" O" D& h+ JPELV和SELV哪个是安全可接触的?另外SELV和PELV与DVCA电压的关系?4 _, }) K* m6 h3 L, \- |. c
DVCA电压等级是可以直接接触的,那如果是DVCA的电压为SELV的电路为什么要跟地做基本绝缘? |
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