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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% e0 `7 ~8 T- ]7 \
标准附上:a) (Method 1) DOUBLE INSULATION or REINFORCED INSULATION providing permanent separation,assured by barriers, routing or fixing; or
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b) (Method 1) DOUBLE INSULATION or REINFORCED INSULATION on or between the parts to be) v5 u! G5 ?+ m3 s K A8 h
separated; or) n1 d9 |# L" F) `4 L
c) (Method 1) DOUBLE INSULATION, consisting of BASIC INSULATION on one of the parts to be1 Q" N$ P" U4 o# ?
separated and SUPPLEMENTARY INSULATION on the other part; or, h# r2 N, I! X* Q
d) (Method 2) BASIC INSULATION on the part at a HAZARDOUS VOLTAGE, together with protective
; K2 ?* I/ m$ u1 j) yscreening connected to the main protective earthing terminal in accordance with 2.6.1 b);
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; W! {9 r% t! I8 Y- ee) (Method 3) BASIC INSULATION on the part at a HAZARDOUS VOLTAGE, together with
) n2 e: U, J1 ?% C7 `4 Fconnection of the other part to the main protective earthing terminal in accordance with* \' _2 H& j$ b% ~; I% x2 ~4 `
2.6.1 b), such that the voltage limits for the accessible part are maintained by relative$ U0 e: g2 h; O% m( C
circuit impedances or by the operation of a protective device; or, \$ V$ O/ Q/ d
f) any other construction providing equivalent separation. |
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