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发表于 2010-9-9 15:24
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fjapple大侠,谢谢你,还有问题想问你:2.9.4里面Separation from hazardous voltages方法1,2,3对于I类产品我应该选用哪一种呢?谢谢
: K; t" |- ?4 L0 Z2 a9 S$ }% B标准附上:a) (Method 1) DOUBLE INSULATION or REINFORCED INSULATION providing permanent separation,assured by barriers, routing or fixing; or
! _; z$ F0 {1 y- T, V) ~4 P* e/ B3 t2 V5 J' S
b) (Method 1) DOUBLE INSULATION or REINFORCED INSULATION on or between the parts to be
3 Z1 W }8 L; O& m3 e& y& |separated; or
! ~: a, Y! K" ~. N- `" Nc) (Method 1) DOUBLE INSULATION, consisting of BASIC INSULATION on one of the parts to be; F6 Q# y3 u2 u# V- e- Z2 R1 c
separated and SUPPLEMENTARY INSULATION on the other part; or& a* j2 H$ K$ N& B& w' R& q
d) (Method 2) BASIC INSULATION on the part at a HAZARDOUS VOLTAGE, together with protective
0 O! X& \1 E4 i0 q- H" |screening connected to the main protective earthing terminal in accordance with 2.6.1 b);0 `, I$ X* u4 |' q1 H: r
or; O# _# P. r# k) E: _0 L
e) (Method 3) BASIC INSULATION on the part at a HAZARDOUS VOLTAGE, together with
9 \; ~" c5 [$ ~7 |) w) X* k8 w9 Oconnection of the other part to the main protective earthing terminal in accordance with
, o4 R5 v( I0 Y( {1 Z% u2.6.1 b), such that the voltage limits for the accessible part are maintained by relative
$ e; x. Z+ s! A! f, ^! [circuit impedances or by the operation of a protective device; or
! L4 V" }* {, Of) any other construction providing equivalent separation. |
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