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根据EN60950-1:2006的定义
: I% m& ? t) n$ g+ sCLASS I EQUIPMENT8 \5 ^5 _% t# w6 m7 g: V# I
equipment where protection against electric shock is achieved by" \, c. Q4 s% x7 h* z9 K b) R2 _
− using BASIC INSULATION and
% i) U5 _% F" d9 Y; H! U3 X− providing a means of connection to the PROTECTIVE EARTHING CONDUCTOR in the building
+ ^ O! a3 f; W2 `wiring those conductive parts that are otherwise capable of assuming HAZARDOUS
) N- R$ L) f+ ^+ R& ?6 ]/ |. g2 XVOLTAGES if the BASIC INSULATION fails
# ^# u2 o, j+ C. v6 nNOTE CLASS I EQUIPMENT may have parts with DOUBLE INSULATION or REINFORCED INSULATION.
* C8 F& o, v( t# |5 i1.2.4.27 z' s/ p5 i. B' H: k# [! N$ v
CLASS II EQUIPMENT$ _- m, h* j) g2 y, u
equipment in which protection against electric shock does not rely on BASIC INSULATION only,$ ]' {( P. f& x2 ]
but in which additional safety precautions, such as DOUBLE INSULATION or REINFORCED
N. O: q/ a3 D: T0 D# R* O) r9 rINSULATION are provided, there being no reliance on protective earthing |
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发表于 2011-3-1 10:54
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