DSH 445 Protection of users

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广东安规检测
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DSH 445

Protection of users ' U) o. o$ a2 L1 Z! x6 P( M" q

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60950-1(ed.1)

Standard:
3 _' P& ~0 {' L, HIEC 60950-1:2000, 1st ed,
Sub clause:
# J0 S: v- A1 C2 a1 d7
Sheet No.
$ W4 |3 e! ~( R/ C! m445
+ e2 c8 ]5 _8 w  USubject:
2 k8 b* }4 W5 B. K0 q5 }Protection of users
Key words:
Antenna, voltage surge test
Decision taken at the
40th meeting 2003
Question:
1 I  b9 j+ o( G" h$ _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?
% K# d! z" j  Y, i(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
8 k& ?9 P1 N  I& T) g(UTP)?
See attached diagram.
Decision:
% O- u" W/ C% ^5 t; I1 h$ gSince 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
  m" A% |5 ?3 V; l3 Kcircuits.
' o! z  t+ `9 K% y) Z) {" T- n& z(b) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
% J# {& c5 X4 tconnector (RJ -45) when the antenna cabling is coax.
% T! `3 T* r1 E5 m(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.

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