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本帖最后由 ljh809809 于 2015-8-17 17:18 编辑
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标准是相通的。可以参考这个 IEC60950-1:2005+A1:2009+A2:2013说得好清楚了。
6 ]9 [4 y% j- E# z# ~2.6.2 Functional earthing" o. u7 E w' J2 `
If FUNCTIONAL EARTHING of accessible or inaccessible conductive parts is necessary, all of the( N( a1 ~ a6 q: X+ @# ^
following apply to the FUNCTIONAL EARTHING circuit:
- U2 t- A$ C; `− the FUNCTIONAL EARTHING circuit shall be separated from parts at HAZARDOUS VOLTAGES in
6 [5 X, N/ `4 I" H* C% Athe equipment by either:% B! E* Q3 }* O$ q, ~
• DOUBLE INSULATION or REINFORCED INSULATION; or1 s8 G$ [1 M+ |: D x
• a protectively earthed screen or another protectively earthed conductive part, separated! l# o- d& {4 U. Z
from parts at HAZARDOUS VOLTAGES by at least BASIC INSULATION; and
( N: |( l9 J9 f2 x! M2 F0 ?6 ~− it is permitted to connect the FUNCTIONAL EARTHING circuit to a protective earth terminal or: |% a. b/ n) X
to a PROTECTIVE BONDING CONDUCTOR; and* a: {$ \3 B0 U, `, P- J
− wiring terminals to be used only for FUNCTIONAL EARTHING shall not be marked by the
. |: i, ?. d: p S# w/ ?- ?symbol (60417-IEC-5017) or by the symbol (60417-IEC-5019), except that, where a2 D& C# u% g% K5 a P. V
wiring terminal is provided on a component (for example, a terminal block) or0 c9 e2 Q' T! O' s
subassembly, the symbol is permitted; and
8 C8 y6 R+ w8 a# w$ w& E( N) |NOTE Other markings such as one of the symbols, (IEC 60417-5018 (DB:2002-10)) or% H& u3 J) w& C6 o
(IEC 60417-5020/ F; B) b( [8 \0 ^
(DB:2002-10)), if appropriate, are permitted." p+ P2 a- k0 T5 v
− for internal FUNCTIONAL EARTHING conductors, the colour combination green-and-yellow& p7 I9 a( b- P
shall not be used except in multipurpose preassembled components (for example, multiconductor
2 L6 ~9 j1 o6 H! p& e. s: |cables or EMC filters); and6 ]- R* h' l% ]2 E* J4 K/ B' d( B# t
NOTE Other markings such as one of the symbols, (IEC 60417-5018 (DB:2002-10)) or
2 H' Y7 T+ ?1 v# V& S(IEC 60417-5020
( z; h- P# W( ^9 F3 N( R(DB:2002-10)), if appropriate, are permitted." u3 O8 W$ s$ M1 q- `0 g
− for internal FUNCTIONAL EARTHING conductors, the colour combination green-and-yellow
! r' P' _( H( }; m# zshall not be used except in multipurpose preassembled components (for example, multiconductor% R1 A, u1 @3 R. p |. F0 q
cables or EMC filters); and
* j3 u4 ], q/ M6 `" {# z6 t− in a power supply cord where a conductor having green-and-yellow insulation is used only1 z. \% \ t# w* V
to provide a FUNCTIONAL EARTHING connection:
# D! B S! R; K• the equipment shall not be marked with the symbol (IEC 60417-5172 (DB:2003:02));
# b7 M( x6 U; ^4 Z, N+ g0 Jand R) ?6 ]! E Q8 z: ~4 r+ O
• there are no requirements other than those in 3.1.9 regarding the termination of this8 `. ~* T- o% L
conductor at the equipment end.
# i z, Q! T4 J& YFor equipment having a power supply cord where a conductor with green-and-yellow
" |6 L# @2 H# @/ z, ~3 K6 Jinsulation is used only to provide a FUNCTIONAL EARTHING connection:
1 d! }0 b7 s* o% I* q− the equipment shall not be marked with the symbol , IEC 60417-5172 (2003-02); and
4 B& r$ h/ p3 E& Y− the equipment may be marked with:$ w' }- O- s. d) R& q. f
• the symbol , IEC 60417-5018 (2011-07); or( c* a' l' Y. w5 a5 D" K
• the symbol , IEC 60417-6092 (2011-10).
* p7 Q! N }4 S; a0 a9 N& P% sThese symbols shall not be used for CLASS I EQUIPMENT.
9 j( S% h" ]8 O7 g! S3 {: M' }There are no requirements other than those in 3.1.9 regarding the termination of this
9 r+ V7 D9 X1 N# |9 o* S# i) A, q! R+ uFUNCTIONAL EARTHING conductor at the equipment end.8 {7 a. L3 n- ^7 y+ q. D! _
Compliance is checked by inspection.4 ?% \) h9 w7 ~) _: S
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图片出不来,有兴趣可以看原文标准。: e- _! Q9 D3 c$ ~% @
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