DSH 445 Protection of users

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广东安规检测
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DSH 445 & E, \+ ^/ B# c/ j9 G

Protection of users & i* A! v, ~# w9 u7 K

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60950-1(ed.1) / j2 [2 y3 {: s

Standard:
IEC 60950-1:2000, 1st ed,
6 U" I% L+ G5 ]; I* }) nSub clause:
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- T/ z0 {# p/ Q, a2 W! M9 ySheet No.
445
1 d" i# J0 C, ^& a: ISubject:
Protection of users
/ |* m2 k- I# JKey words:
0 I; r3 z% ]- w8 j/ |) U* DAntenna, voltage surge test
Decision taken at the
40th meeting 2003
& N3 {& a; s; l7 a' ]Question:
6 p: Z3 W% q' {For protection of users and service persons from transients and voltage surges, what are the appropriate
6 @# }: M0 K; ^* frequirements between the following points for ITE connected to an external antenna:
(a) antenna connection and Primary circuits?
(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
' H# V7 T/ y: H7 S(UTP)?
See attached diagram.
Decision:
2 y0 v* r/ @8 t% r1 XSince Clause 7 is in IEC 60950-1, but is not in IEC 60950 3rd Ed, all references are to IEC 60950-1
The circuit connected to the antenna is classified in accordance with Sub-Clause 7.1 and subjected to the
5 U) s$ o- w7 A( L' Rappropriate requirements per 7.1. Additionally,
! o2 o6 z1 o# {(a) Sub-clause 7.3.1 is applied between the external antenna connection (terminal) and Primary
circuits.
(b) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
connector (RJ -45) when the antenna cabling is coax.
$ G0 y. M" \, s& g; g(c) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
9 B: \; [1 C5 j7 w# b* j% n/ J: V1 V% Gconnector (RJ -45) when the antenna cabling is UTP.


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