DSH 445 Protection of users

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广东安规检测
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DSH 445 2 @' M* [! W! }* Z3 M6 Y( L

Protection of users . I8 E- v, W7 I$ F& @# S9 w+ G! B

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60950-1(ed.1) 4 Q6 ^5 @7 i: I; {/ h' b1 L+ s

Standard:
) k2 J, K8 _- a1 TIEC 60950-1:2000, 1st ed,
9 `3 g0 N1 r/ f$ {Sub clause:
, l& P4 q* J! \4 T4 u8 _7
Sheet No.
445
Subject:
" u' ^7 _0 ^4 ~# J- J% ~# aProtection of users
Key words:
Antenna, voltage surge test
Decision taken at the
9 k9 Y. O& O/ L$ l$ b3 ~9 y$ j, X9 G) [40th meeting 2003
4 a) b# r3 `% F8 w! p8 i5 K9 [Question:
For protection of users and service persons from transients and voltage surges, what are the appropriate
2 I4 w/ ^9 s* z0 _4 h" R' X$ t! h/ r% ^+ urequirements between the following points for ITE connected to an external antenna:
* o, W( [2 {; i0 s(a) antenna connection and Primary circuits?
(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)?
1 n3 [/ S7 k& d: U5 r2 z& ]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
+ [6 H1 _7 r; g; r' {+ x; sThe circuit connected to the antenna is classified in accordance with Sub-Clause 7.1 and subjected to the
appropriate requirements per 7.1. Additionally,
6 {. _( g2 }5 S& r8 Z- x3 E(a) Sub-clause 7.3.1 is applied between the external antenna connection (terminal) and Primary
5 K, r! k3 J- L8 v$ r0 }. Ycircuits.
4 ~0 O# f. Y, D(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.
; D; ~8 O2 ~8 ~# q) I) R) d(c) Sub-clause 7.2 is applied between the external antenna connection (terminal) and the SELV
7 ?, }7 I( p8 Z2 d$ Nconnector (RJ -45) when the antenna cabling is UTP.
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