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标题: DSH 446 Protection of users [打印本页]

作者: 小米    时间: 2012-11-6 16:55
标题: DSH 446 Protection of users
DSH 446
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Protection of users
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60950(ed.3)* S% D$ G( M( ?5 P

$ j6 J& |% T1 D  c# v* R: d2 C* MStandard:
9 g6 v2 ^! h# @3 N( VIEC 60950, 3rd ed.  ~4 d# k6 V- s5 X
Sub clause:% g$ M3 Y$ b9 B; E5 b
7
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446
! F7 V1 @) y! ^Subject:
, H$ w  k' Q! mProtection of users
) y  r* y8 ~% H( p; QKey words:) u5 J/ K7 y$ Z
Antenna, voltage surge test" J) b/ ^' E' f; }% K! I. E" w1 V
Decision taken at the
3 m4 T8 ~7 x& {40th meeting 2003
1 H& h$ X4 S6 D( D$ @! Z$ \Question:+ t  R7 `" J. ^! e# }: o' M/ ~" Z% B
For protection of users and service persons from transients and voltage surges, what are the appropriate1 r6 [4 x' D. D# S8 b- p6 t
requirements between the following points for ITE connected to an external antenna:
: q8 k. f1 q0 |6 k6 n4 |2 u(a) antenna connection and Primary circuits?
6 Q+ w2 N, w( |- n" w2 B/ `5 q6 f(b) antenna connection and SELV circuits when the antenna cabling is coax?
, R0 K- F2 e% L* ?; b. V3 C(c) Antenna connection and SELV circuits when the antenna cabling is unshielded twisted pair
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See attached diagram.# }4 ]) g$ W- x: c4 ?
Decision:
& t/ W5 x/ m& A# G* TSince Clause 7 is in IEC 60950-1, but is not in IEC 60950 3rd Ed, the requirements cannot be used for the 3rd
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This decision applies to IEC 60950-1 3rd edition.
' W/ s, x' u" t, L1 r0 FIn the case of IEC 60950 3rd edition sub clause 10.1 of IEC 60065 6th edition is to be applied, by referring to
9 P; D% `5 R  K5 ]6 xIEC Guide 112 2nd edition "Guide on the safety of multimedia equipment".( i, f0 w2 V9 y0 m# V& ?$ g
Although, the test of 10.1 to IEC 60065 requires test between the terminal for the connection to antenna and& g/ C5 m; ~4 X
Mains supply Terminals, and not between the terminal for the connection to antenna and SELV.
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[attach]77162[/attach]% e, M$ `; u0 j2 ]* j. T. ?





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