DSH 445 Protection of users

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广东安规检测
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DSH 445 : c) _2 n0 l* v6 |

Protection of users

7

60950-1(ed.1) " B* F1 p% m: u

Standard:
: X. \3 J& {2 c0 D! |IEC 60950-1:2000, 1st ed,
* r* B' q: h' f6 U. c; k/ USub clause:
5 S0 f' j. Q6 q8 i, B7
Sheet No.
  `7 F. \; V' f! M, A& S1 g445
Subject:
( j- L4 L) t4 d5 p8 W1 |: T1 @9 _Protection of users
Key words:
Antenna, voltage surge test
3 Z+ Q3 C/ q- C- \& a% z3 }) KDecision taken at the
) j2 s" O3 _3 t+ Y40th meeting 2003
& n# I2 Y& K# w% x* H" MQuestion:
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?
1 _, d5 A; e( b1 s) B0 h# J(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
(UTP)?
See attached diagram.
; a- k7 e  Z# u1 G/ @2 m2 eDecision:
3 ^# A. [& n- S& J* f' F( uSince 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
appropriate requirements per 7.1. Additionally,
(a) Sub-clause 7.3.1 is applied between the external antenna connection (terminal) and Primary
circuits.
5 o, |* H1 i5 T, a6 ]; L(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.
% K, n7 o  A% I4 X. y; |(c) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
connector (RJ -45) when the antenna cabling is UTP.

* d% ~: d" E. v& i$ |