DSH 445 Protection of users

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广东安规检测
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DSH 445 4 @- i9 N3 S' Q4 N3 Y: k3 \

Protection of users : [9 d4 p' Z& I" s  L, C

7 7 M* z" J$ V0 ?

60950-1(ed.1)

Standard:
IEC 60950-1:2000, 1st ed,
& b+ j. X, Y+ b2 T5 \* ASub clause:
7
: b6 e6 `/ }; g6 D( l9 X6 T9 q/ kSheet No.
445
8 u- a' S; O2 Y" G) q/ MSubject:
5 P1 C& V3 L: W& a! d1 T- g: KProtection of users
Key words:
Antenna, voltage surge test
Decision taken at the
40th meeting 2003
Question:
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?
(b) antenna connection and SELV circuits when the antenna cabling is coax?
( v; k4 U, u3 J2 ?" A1 A% f(c) Antenna connection and SELV circuits when the antenna cabling is unshielded twisted pair
(UTP)?
See attached diagram.
Decision:
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
appropriate requirements per 7.1. Additionally,
) E' ~( i! u( g$ K(a) Sub-clause 7.3.1 is applied between the external antenna connection (terminal) and Primary
circuits.
9 I6 o6 H$ n7 M) e(b) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
1 r5 I7 _( M$ j1 ^- zconnector (RJ -45) when the antenna cabling is coax.
" t: a" ?1 h! _3 g$ V) ]3 _+ V(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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