DSH 446 Protection of users

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广东安规检测
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DSH 446 6 ?1 i# G4 A+ `' j  h

Protection of users 1 t0 y1 k" B7 Z

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60950(ed.3) " W+ t; ?0 x/ o6 U7 N

Standard:
IEC 60950, 3rd ed.
7 J; w9 B, z  uSub clause:
/ \3 h; d" `" Q" a$ ]! M% R7
/ k/ ^4 d3 C- x2 pSheet No.
2 Q/ Q  i, l: \446
* g1 i9 G" G/ ^  H" x* ]Subject:
Protection of users
Key words:
Antenna, voltage surge test
+ ?6 C: Q  S+ a! B0 `Decision taken at the
, y6 E: J: O' L, S40th meeting 2003
Question:
For protection of users and service persons from transients and voltage surges, what are the appropriate
requirements between the following points for ITE connected to an external antenna:
(a) antenna connection and Primary circuits?
& [, H2 ~) p3 M* m5 |(b) antenna connection and SELV circuits when the antenna cabling is coax?
(c) Antenna connection and SELV circuits when the antenna cabling is unshielded twisted pair
4 g( L8 `. @" W2 h5 Q(UTP)?
See attached diagram.
Decision:
/ _7 c% X3 @: C! LSince Clause 7 is in IEC 60950-1, but is not in IEC 60950 3rd Ed, the requirements cannot be used for the 3rd
" _9 O; ?% E  \edition.
This decision applies to IEC 60950-1 3rd edition.
In the case of IEC 60950 3rd edition sub clause 10.1 of IEC 60065 6th edition is to be applied, by referring to
8 |2 \, [0 \! p  U. Q# n  v0 {IEC Guide 112 2nd edition "Guide on the safety of multimedia equipment".
Although, the test of 10.1 to IEC 60065 requires test between the terminal for the connection to antenna and
0 x5 ~; z- e+ o& K, {Mains supply Terminals, and not between the terminal for the connection to antenna and SELV.

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