DSH 445 Protection of users

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广东安规检测
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DSH 445 4 `3 E- h! t: y

Protection of users 8 f4 y- a' @) X" I

7 + N: P( A1 ^! I. E" Z  x  l% m

60950-1(ed.1) $ y0 P6 U+ \2 M. l( D2 W

Standard:
, ^6 F7 m  V! T! z+ x$ R& TIEC 60950-1:2000, 1st ed,
Sub clause:
7
; I1 q, u4 H& h; fSheet No.
445
) U  q* P$ Z. Q/ m' ESubject:
Protection of users
Key words:
! A7 a! d' v9 Z, j/ lAntenna, voltage surge test
% E7 s+ d1 m, V( u) K) L. ODecision taken at the
40th meeting 2003
Question:
' [" \: {6 _& A4 p6 BFor 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:
( T" ?/ J( c: a! ?. j; K1 `8 u(a) antenna connection and Primary circuits?
+ s9 ]+ S8 r- i3 d" w(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
; W. p. X# o# {/ Q  b1 r: V(UTP)?
See attached diagram.
Decision:
# ~( F( d+ r( T' I. E; rSince 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
0 r1 x4 M0 }+ k0 s: lappropriate requirements per 7.1. Additionally,
' \/ a3 K, d3 U  z+ J(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.
(c) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
) w: [$ K+ p" O7 y+ H9 mconnector (RJ -45) when the antenna cabling is UTP.


+ c; Z. @( o& M2 ]. p: w