DSH 445 Protection of users

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广东安规检测
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IEC60335试验指甲

DSH 445 ! e, Q% a. u. ?

Protection of users 1 c' m) V5 t2 F: l! e/ U8 ~

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60950-1(ed.1)

; G; K  T6 c5 u" }, _5 Q4 q% \: ?# Z/ EStandard:
6 ?$ w# H& W( O7 B: ?4 |IEC 60950-1:2000, 1st ed,
Sub clause:
7
' h6 x$ p  I* d, Q( f0 qSheet No.
0 m9 d3 T4 H' M2 k- S# @( I445
# A) {" k' w1 |  bSubject:
# H. F4 z, y8 z4 |: uProtection of users
- d& U( m9 Z$ G/ [: cKey words:
Antenna, voltage surge test
Decision taken at the
40th meeting 2003
; q1 H$ k! x2 H. e; {2 mQuestion:
For protection of users and service persons from transients and voltage surges, what are the appropriate
$ s& d, l: |* k/ b: g) p( Drequirements between the following points for ITE connected to an external antenna:
(a) antenna connection and Primary circuits?
# I& `- k5 G) s(b) antenna connection and SELV circuits when the antenna cabling is coax?
! V, n; x, R: T( U(c) Antenna connection and SELV circuits when the antenna cabling is unshielded twisted pair
: q6 ?+ d( D5 i5 F) k8 j& K# O4 {(UTP)?
See attached diagram.
% s% m6 ~, ~3 L, \! D6 V; G+ A* SDecision:
Since 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
9 x: d6 }( T1 t8 eappropriate requirements per 7.1. Additionally,
$ V8 J2 }  }% P; G(a) Sub-clause 7.3.1 is applied between the external antenna connection (terminal) and Primary
* ?2 f5 o! Y) b& O; icircuits.
(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.
& i% N' A( x; u- Z; Q7 ?+ [(c) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
, q. {. O) |6 o5 ~connector (RJ -45) when the antenna cabling is UTP.

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