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[OFF] DSH 446 Protection of users

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发表于 2012-11-6 16:55 | 显示全部楼层 |阅读模式
广东安规检测
有限公司提供:
DSH 446( T( R  s" C4 ^3 N

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Protection of users
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-
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60950(ed.3)- w$ @. o* E% m+ B% K  \- q/ N
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Standard:4 E6 V1 P0 b6 R6 Y7 E0 v5 ^- V
IEC 60950, 3rd ed.& j1 \$ \: z8 ?# w
Sub clause:
  }" w4 V4 J- Y" }6 \3 y7
+ x  `' J+ @0 d% x1 q- cSheet No." F6 O. W9 z* R) n3 U! P$ S
4461 ]$ ]# o9 F1 O5 n" T  ?$ ~3 G3 y# T+ d
Subject:
+ V8 H" @: j& B4 f1 r+ UProtection of users
! w; T8 W7 @& b5 h* Q5 G5 RKey words:
8 Z4 b+ b6 F5 g/ g' n9 @$ gAntenna, voltage surge test  u( x; x6 Y  s9 i3 d) z2 b8 K
Decision taken at the1 r% _7 g8 y! V9 a
40th meeting 2003
" ^$ c: a3 c) uQuestion:
  D. v" n/ _! y6 O+ AFor protection of users and service persons from transients and voltage surges, what are the appropriate" X9 q; Q4 d" q5 y2 i
requirements between the following points for ITE connected to an external antenna:4 f) a* j: v' a6 S% t7 V- a
(a) antenna connection and Primary circuits?
9 ^* d. n& i' d% Y(b) antenna connection and SELV circuits when the antenna cabling is coax?
8 I9 B5 L( P# P* g5 W& {0 t7 M(c) Antenna connection and SELV circuits when the antenna cabling is unshielded twisted pair
: M8 C. W4 m- A$ d) R  ^(UTP)?1 x, X* f4 `, y9 ~' |& x
See attached diagram.  c2 i6 o+ G% y0 \  \# c
Decision:
. {6 E( q1 y/ O; c; HSince Clause 7 is in IEC 60950-1, but is not in IEC 60950 3rd Ed, the requirements cannot be used for the 3rd
: j6 F* K% U, J) h1 d& \edition.! I4 Z+ D5 ~' W+ L* o
This decision applies to IEC 60950-1 3rd edition.
( z* S1 b& Z/ o; OIn the case of IEC 60950 3rd edition sub clause 10.1 of IEC 60065 6th edition is to be applied, by referring to' ^% R% c6 S# q8 Z. a
IEC Guide 112 2nd edition "Guide on the safety of multimedia equipment".( g+ l; ^- ?. `' e- t/ A8 V2 J
Although, the test of 10.1 to IEC 60065 requires test between the terminal for the connection to antenna and' l. {" K4 f, i
Mains supply Terminals, and not between the terminal for the connection to antenna and SELV.. u9 v% v9 s% H3 O5 ~. a

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