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接地在60950里面1.7.7讲到protective earthing connector 连接使用带圈的接地符号,使用protective bonding connector 可以不用接地符号或者使用 不带圈的符号.
/ n! ~1 {% m2 X. Z' A后面还有两条豁免条款,谁能来解释下
; P8 M" C) |% V& n6 x4 }6 dThe following situations are exempt from the above requirements:( a$ f7 Z2 z$ X$ I" r( Z7 \- L
– where terminals for the connection of a supply are provided on a component (for2 m3 q- }2 V, i/ V! N9 Z2 C/ B
example, a terminal block) or subassembly (for example, a power supply unit), the
' e$ J" A6 ?: Q0 gsymbol(没圈的接地符号) is permitted for the protective earthing terminal instead of(有圈的接地符号) ;
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– on subassemblies or components, the symbol(有圈的接地符号) is permitted in place of the symbol(没圈的接地符号)
1 R5 q- B* ?* Q. M8 uprovided that it does not give rise to confusion.3 E+ c4 N/ G, r6 {% V: C; z6 f& O
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下面我把CTL 关于这个接地符号的决议放上来,大家也看看,我没看懂& l' }7 Y) I9 v3 _% o) k
Question:1 A( H7 w7 d1 c+ f
Is this requirement applicable to products provided with a mains inlet? If yes, is the symbol1 t+ E$ K0 j5 i6 h' d4 _% J
IEC 417 No. 5019,(有圈的接地符号) then, required at the location where the earthing conductor (coming from& @& v! v1 c. J. j/ J7 O+ b$ I5 H
the inlet) is terminated?
' `: f2 g, e8 c% fDecision:
1 {& G) b1 D! U, Y9 TThe symbol is not required in the above mentioned case
" b) r& F G4 C1 zExplanatory notes:
' Y! A9 g" }, w, rIt has been reported that some test houses require this symbol. |
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